Claims:
1. A rotational speed control mechanism for climbing or mountaineering equipment, said mechanism comprising:
a pulley having at least one loop of a single or double rope wound around circumference of said pulley; and
a light-emitting diode (LED) electrically connected in series with at least one motor;
wherein said pulley, while descending, rotates and transfers said rotational movement to said motor so as to generate current, and said LED is powered by the generated current and its property of cut-off voltage results in controlled descending along the rope .

2. The rotational speed control mechanism as claimed in claim 1, wherein the motor, upon receipt of said rotational movement, operates as a generator to generate said current.

3. The rotational speed control mechanism as claimed in claim 1, wherein said LED comprises a cut-off voltage.

4. The rotational speed control mechanism as claimed in claim 3, wherein said cut-off voltage is provided as an input to said motor to prevent one or more additional voltages entering into said motor to create a braking force through generation of a magnetic locking in said motor, the additional voltages being generated by the motor due to free falling of a load descending along said rope.

5. The rotational speed control mechanism as claimed in claim 4, wherein said cut-off voltage causes a resistance to induce magnetic locking in said motor and prevents shaft of the motor from turning faster.

6. The rotational speed control mechanism as claimed in claim 4, wherein said cut-off voltage restricts free falling of said load descending along said rope.

7. The rotational speed control mechanism as claimed in claim 3, wherein said cut-off voltage regulates voltage as well as the current in said motor.

8. The rotational speed control mechanism as claimed in claim 1, wherein said pulley is mechanically connected to said motor having said LED connected in series via epicyclic gearbox.

9. The rotational speed control mechanism as claimed in claim 1, wherein said epicyclic gearbox comprises one or more planet carriers, one or more planet gears, one or more ring gears, and one or more sun gears.

10. The rotational speed control mechanism as claimed in claim 8, wherein said epicyclic gearbox is connected to shaft of said motor via one or more belts.
, Description:
TECHNICAL FIELD
[0001] The present disclosure relates to a rotational speed control mechanism and, more specifically, it relates to an electro-mechanical system and a mechanism which controls a rotation speed of descend when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] There are many examples where a climbing device is needed that can be operated by the person ascending the rope, such as mountain climbing, caving, tree trimming, rescue operations and military operations. Industrial uses of a climbing device may include scaling tall structures, towers, poles, mine shafts or bridge works for servicing, cleaning, window washing, painting, etc. Manual lifting devices, also known as ascenders, are configured to grip a vertical tensioned rope when load is present and to slide when the load is released. Typically, an individual must be capable of repetitively lifting their own weight on the manual ascender when climbing or descender when descend with these devices.
[0004] There are several mechanisms in the market that can reduce the speed of descend and completely bring it to a stop. The belaying device used by the climber while descend has several mechanisms for controlling their speed of descends. While some systems use centrifugal brakes, some use the concept of twining and friction. Currently, various braking systems are used in belaying devices to control the speed of descend of the person hanging from the device through the rope. These braking systems include, drum brakes, centrifugal brakes and friction generated by various twining shapes. The term drum brakes usually mean a brake in which a set of shoe or pads press against the inner surface of the drum. This creates friction between the pads and the drum, resulting in reduction of the speed. This is a commonly used technique in any mechanical braking systems. Friction between two parts is used to reduce/control the speed. The kinetic energy is converted into heat. The heat generated during the braking process needs to be dissipated from the system through various parts into the atmosphere.
[0005] Also, this braking system uses a lining which creates necessary friction required to control the speed. This lining is prone to wear and tear and the effectively of the brake reduces when the lining gets degraded over use. This system also requires a lot of parts making the entire system bulky. Also, these systems need to be continuously operated by the operator. The centrifugal brake is another commonly used mechanism in these controlled descend devices. These brakes work on the same principle as the drum brakes. But instead of an actuator that pushes the brake liners towards the drum, the centrifugal force generated due to the speed of rotation pushes the brake liners towards the drum. The effectiveness of these brakes depends on the centrifugal force felt by the liner shoes and the weight of the liner shoes installed. Thus, making the system heavy and bulky.
[0006] However, in the conventional controlling mechanism like drum brake and centrifugal brakes a constant speed of descend is difficult to achieve, and these brakes needs to be constantly operated. Additionally, none of the conventional mechanism results in a steady and defined speed of vertical descend.
[0007] Therefore, there is a need to provide a new, efficient, and technically advanced and improved controlled descend mechanism that can provide a constant speed of vertical descend without the intervention of an operator. Further, there is also a need to provide an electro-mechanical system which controls the speed of descend when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires. Furthermore, there is also a need of a controlled descend device with a mechanism where, climbers do not need to constantly operate various brakes while descending from a certain height. Additionally, there is also a need of a compact controlled descend device with a mechanism that is used as an emergency system in heavy lifting cranes, where the heavy load hanging at a certain height can be lowered at a controlled speed in case of any system failure.
[0008] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
[0009] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, reaction conditions, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about”. Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
[00010] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[00011] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein. All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[00012] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all groups used in the appended claims.

OBJECTS OF THE INVENTION
[00013] An object of the present disclosure is to provide a rotational speed control mechanism that helps controlled descend of the load at a pre-defined speed.
[00014] Another object of the present disclosure is to provide an electro-mechanical system which controls the speed of descend when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires.
[00015] Another object of the present disclosure is to provide a controlled descend mechanism that can provide a constant speed of vertical descend without the intervention of an operator.
[00016] Another object of the present disclosure is to provide a compact controlled descend mechanism that is used as an emergency system in heavy lifting cranes, where the heavy load hanging at a certain height can be lowered at a controlled speed in case of any system failure.

SUMMARY
[00017] The present disclosure relates to a rotational speed control mechanism and, more specifically, it relates to an electro-mechanical system and a mechanism which controls a rotation speed of descend when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires.
[00018] Accordingly, an aspect of the present disclosure relates to a rotational speed control mechanism for climbing or mountaineering equipment. In an aspect, the mechanism can include a pulley having at least one loop of a single or double rope wound around circumference of said pulley; and a light-emitting diode (LED) electrically connected in series with at least one motor. In another aspect, the pulley, while descending, rotates and transfers said rotational movement to said motor so as to generate current, and said LED is powered by the generated current and its property of cut-off voltage results in controlled descending along the rope.
[00019] In an aspect, the motor, upon receipt of said rotational movement can operate as a generator to generate said current.
[00020] In an aspect, LED can include a cut-off voltage.
[00021] In an aspect, cut-off voltage can be provided as an input to said motor to prevent one or more additional voltages entering into said motor to create a braking force through generation of a magnetic locking in said motor, the additional voltages being generated by the motor due to free falling of a load descending along said rope.
[00022] In an aspect, cut-off voltage can cause a resistance to induce magnetic locking in said motor and prevents shaft of the motor from turning faster. In another aspect, cut-off voltage can restrict free falling of said load descending along said rope. In another aspect, cut-off voltage can regulate voltage as well as the current in said motor.
[00023] In an aspect, pulley can be mechanically connected to said motor having said LED connected in series via epicyclic gearbox
[00024] In an aspect, the epicyclic gearbox can include one or more planet carriers, one or more planet gears, one or more ring gears, and one or more sun gears.
[00025] In an aspect, the epicyclic gearbox can be connected to shaft of said motor via one or more belts.
[00026] In contrast to the conventional system, the present invention provides a new, efficient, technically advanced and improved rotational speed control mechanism that can provide a constant speed of vertical descend without the intervention of an operator. Further the present invention provide an electro-mechanical system which controls the speed of descend when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires. Furthermore, the present invention provides a compact controlled descend device with a mechanism that is used as an emergency system in heavy lifting cranes, where the heavy load hanging at a certain height can be lowered at a controlled speed in case of any system failure.
[00027] Further, the present invention provides a mechanism that can provide a constant speed of vertical descend without the intervention of the operator. The speed of descend can be pre-defined and the mechanism can be designed for various loads and speeds of descend. The inception of the invention came from controlled descend devices used by mountain climbers which use various aforementioned mechanisms to control the speed of descend. This mechanism facilitates this aspect, for example, when a load of 50 kg is to be lowered from a certain height with the help of a rope and a pulley, the load will fall freely unless a mechanism is used to control the rate of its descend. Furthermore, the present invention addresses this aspect of vertical descend. The mechanism can be used only allow the load to fall at a predefined speed. This can be a useful addition to the controlled descend devices where, climbers do not need to constantly operate various brakes while descending from a certain height. This mechanism can also be used as an emergency system in heavy lifting cranes, where the heavy load hanging at a certain height can be lowered at a controlled speed in case of any system failure. The mechanism can be very compact even for heavy loads and can thus find applications in various industries.
[00028] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF THE DRAWINGS
[00029] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. The diagrams are for illustration only, which thus is not a limitation of the present disclosure, and wherein:
[00030] FIG. 1 illustrates an exploded view of a proposed system, in accordance with an exemplary embodiment of the present disclosure.
[00031] FIG. 2 illustrates a graph of current (I) in LED vs. voltage (V) across LED, in accordance with an exemplary embodiment of the present disclosure.
[00032] FIG. 3 illustrates an exemplary working of a proposed system, in accordance with an exemplary embodiment of the present disclosure.
[00033] FIG. 4 illustrates an isometric view of a proposed system, in accordance with an exemplary embodiment of the present disclosure.
[00034] FIG. 5 illustrates a front view of a proposed system, in accordance with an exemplary embodiment of the present disclosure.
[00035] FIG. 6 illustrates a top view of a proposed system, in accordance with an exemplary embodiment of the present disclosure.
[00036] FIG. 7 illustrates an exploded view of a drum, in accordance with another exemplary embodiment of the present disclosure.
[00037] FIG. 8 illustrates an exploded view of a ring gear, in accordance with another exemplary embodiment of the present disclosure.
[00038] FIG. 9 illustrates an exploded view of a gear, a motor and LED, in accordance with another exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION
[00039] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure as defined by the appended claims.
[00040] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.
[00041] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[00042] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. These exemplary embodiments are provided only for illustrative purposes and so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those of ordinary skill in the art. The invention disclosed may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Various modifications will be readily apparent to persons skilled in the art. The general principles defined herein may be applied to other embodiments and applications without departing from the scope of the invention. Moreover, all statements herein reciting embodiments of the invention, as well as specific examples thereof, are intended to encompass both structural and functional equivalents thereof. Additionally, it is intended that such equivalents include both currently known equivalents as well as equivalents developed in the future (i.e., any elements developed that perform the same function, regardless of structure). Also, the terminology and phraseology used is for the purpose of describing exemplary embodiments and should not be considered limiting. Thus, the present invention is to be accorded the widest scope encompassing numerous alternatives, modifications and equivalents consistent with the principles and features disclosed. For purpose of clarity, details relating to technical material that is known in the technical fields related to the invention have not been described in detail so as not to unnecessarily obscure the present invention.
[00043] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the "invention" may in some cases refer to certain specific embodiments only. In other cases, it will be recognized that references to the "invention" will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[00044] All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g., “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[00045] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[00046] The present disclosure relates to a rotational speed control mechanism and, more specifically, it relates to an electro-mechanical system and a mechanism which controls a rotation speed of descend when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires.
[00047] Accordingly, an aspect of the present disclosure relates to a rotational speed control mechanism for climbing or mountaineering equipment. In an aspect, the mechanism can include a pulley having at least one loop of a single or double rope wound around circumference of said pulley; and a light-emitting diode (LED) electrically connected in series with at least one motor. In another aspect, the pulley, while descending, rotates and transfers said rotational movement to said motor so as to generate current, and said LED is powered by the generated current and its property of cut-off voltage results in controlled descending along the rope.
[00048] In an aspect, the motor, upon receipt of said rotational movement can operate as a generator to generate said current.
[00049] In an aspect, LED can include a cut-off voltage.
[00050] In an aspect, cut-off voltage can be provided as an input to said motor to prevent one or more additional voltages entering into said motor to create a braking force through generation of a magnetic locking in said motor, the additional voltages being generated by the motor due to free falling of a load descending along said rope.
[00051] In an aspect, cut-off voltage can cause a resistance to induce magnetic locking in said motor and prevents shaft of the motor from turning faster. In another aspect, cut-off voltage can restrict free falling of said load descending along said rope. In another aspect, cut-off voltage can regulate voltage as well as the current in said motor.
[00052] In an aspect, pulley can be mechanically connected to said motor having said LED connected in series via epicyclic gearbox
[00053] In an aspect, the epicyclic gearbox can include one or more planet carriers, one or more planet gears, one or more ring gears, and one or more sun gears.
[00054] In an aspect, the epicyclic gearbox can be connected to shaft of said motor via one or more belts.
[00055] In contrast to the conventional system, the present invention provides a new, efficient, technically advanced and improved rotational speed control mechanism that can provide a constant speed of vertical descend without the intervention of an operator. Further the present invention provide an electro-mechanical system which controls the speed of descend when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires. Furthermore, the present invention provides a compact controlled descend device with a mechanism that is used as an emergency system in heavy lifting cranes, where the heavy load hanging at a certain height can be lowered at a controlled speed in case of any system failure.
[00056] Further, the present invention provides a mechanism that can provide a constant speed of vertical descend without the intervention of the operator. The speed of descend can be pre-defined and the mechanism can be designed for various loads and speeds of descend. The inception of the invention came from controlled descend devices used by mountain climbers which use various aforementioned mechanisms to control the speed of descend. This mechanism facilitates this aspect, for example, when a load of 50 kg is to be lowered from a certain height with the help of a rope and a pulley, the load will fall freely unless a mechanism is used to control the rate of its descend. Furthermore, the present invention addresses this aspect of vertical descend. The mechanism can be used only allow the load to fall at a predefined speed. This can be a useful addition to the controlled descend devices where, climbers do not need to constantly operate various brakes while descending from a certain height. This mechanism can also be used as an emergency system in heavy lifting cranes, where the heavy load hanging at a certain height can be lowered at a controlled speed in case of any system failure. The mechanism can be very compact even for heavy loads and can thus find applications in various industries.
[00057] Further, the present invention provides a mechanism that can provide a constant speed of vertical descend without the intervention of the operator. The speed of descend can be pre-defined and the mechanism can be designed for various loads and speeds of descend. The inception of the invention came from controlled descend devices used by mountain climbers which use various aforementioned mechanisms to control the speed of descend. This mechanism facilitates this aspect, for example, when a load of 50 kg is to be lowered from a certain height with the help of a rope and a pulley, the load will fall freely unless a mechanism is used to control the rate of its descend. Furthermore, the present invention provides addresses aspect of vertical descends. The mechanism can be used only allow the load to fall at a predefined speed. This can be a useful addition to the controlled descend devices where, climbers do not need to constantly operate various brakes while descending from a certain height. This mechanism can also be used as an emergency system in heavy lifting cranes, where the heavy load hanging at a certain height can be lowered at a controlled speed in case of any system failure. The mechanism can be very compact even for heavy loads and can thus find applications in various industries.
[00058] For the simplicity of understanding of the subject matter, following reference numerals are used for associated/corresponding feature/elements of the proposed system:
102. Planet carrier
104. Planet gears
106. Ring gear
108. Sun gear
110. Belt drive
112. LED
114. DC motor
116. Support for motor
118. Support/ Casing
120. Support for ring gear
122. Support for carrier shaft
124. Drum
126. Rope/ Wire
128. Pulley on motor shaft
302. Generator
304. Epicyclic gear box
306. Weight
402. Secondary drum
502. Belt
602. DC motor shaft
[00059] In an embodiment, the electro-mechanical system primarily can include a drum/pulley, an epicyclic gearbox, a motor, and at least one LED. The rope/wire that can be used for the harness the load passes through the drum. The drum can be attached to the epicyclic gearbox through a spindle. The epicyclic gearbox (sun gear) can be connected to the motor via a belt. When the load, attached to the rope, falls, results in rotation of the drum as well as the motor. The motor starts function like a generator, creating a voltage across its terminals. The DC motor can be connected to the LED, in series. The LED draws the current from the motor. LED’s cut-off voltage regulates the voltage and current in the circuit, wherein any additional voltage generated by the motor due to the freely falling load is blocked by the LED, thus causing a resistance. This resistance can be responsible for inducing a phenomenon called ‘magnetic locking’ in the motor and prevents the shaft of the motor from turning any faster. In other words, LED when used in series with the DC motor creates a certain kind of braking force. This braking force can be utilized to restrict the freely falling motion of the load.
[00060] In an embodiment, the electro-mechanical system can control the speed of descend when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires. The system has a mechanism and the mechanism can include a pulley to twine the rope/wire around it. The load can be applied to the rope/wire directly or to the device that housing this novel invention. Control can be established by transferring the rotational movement at the pulley to the DC motor connected in series with LED. The resistance can be provided by the LED across the armature functions as a dynamic breaking means for the motor, thus controlling the speed of descend. In another embodiment, the mechanism helps in lowering a load at a constant rate irrespective of the load applied within the design specification.
[00061] In an embodiment, the system harnesses the potential energy due to gravity. An escapement mechanism is used in the gravity clock to slow down the speed of descend of the working load. In this invention, a LED is used as an escapement. LED has a cut-off voltage which prevents additional voltage from entering in the circuit. This inherent property of LED is used when connected in series with a motor, which acts as a generator when the input energy is provided through the shaft. The LED blocks the additional voltage, which increases current in the armature of the motor. This phenomenon is called magnetic locking. This phenomenon prevents the motor shaft from turning any faster. Thus, controlling the speed of descend. By increasing the number of LED’s the amount of voltage across the circuit can be increased, increasing the speed of descend. This mechanism however, cannot bring descend to a complete stop unless an additional system is used in the addition. The mechanism is designed such that the body of the climber is the load falling due to gravity. Its potential energy is converted into mechanical energy at the shaft of the motor, which in turn powers the LED. LED prevents the shaft of the motor from turning any faster, due to its inherent property, hence, controlling the speed of descend.
[00062] FIG. 1 illustrates an exploded view of a proposed system, in accordance with an exemplary embodiment of the present disclosure.
[00063] In an embodiment, the proposed system is a device with an electro-mechanical system to control a rotation speed of descends when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires.
[00064] In an exemplary embodiment, the proposed system can include a planet carrier 102, planet gears 104, ring gear 106, sun gear 108, belt drive 110, LED 112, DC motor 114, support for motor 116, support/ casing 118, support for ring gear 120, support for carrier shaft 122, drum 124, rope/ wire 126, pulley on motor shaft.
[00065] In an embodiment, the epicyclic gearbox can include two gears mounted so that the center of one gear revolves around the center of the other. A carrier or planet carrier 102 connects the centers of the two gears and rotates to carry one gear, called the planet gear 104, around the other, called the sun gear 108. The planet 104 and sun gears 108 mesh so that their pitch circles roll without slip. A point on the pitch circle of the planet gear traces an epicycloids curve. In this simplified case, the sun gear 108 is fixed and the planetary gear(s) roll around the sun gear. An epicyclic gear train can be assembled so the planet gear rolls on the inside of the pitch circle of a fixed, outer gear ring, or ring gear, sometimes called an annular gear. In this case, the curve traced by a point on the pitch circle of the planet is a hypocycloid. The combination of epicycle gear trains with a planet engaging both a sun gear and a ring gear is called a planetary gear train. In this case, the ring gear is usually fixed and the sun gear is driven.
[00066] In an embodiment, LED 112 connected in series with the motor 114 creates the braking force required to lower the load at a constant speed. In an embodiment, the ring gear 106 is a type of gear which looks like a ring and have angular cut teethes at its inner surface and is placed in outermost position in en epicyclic gearbox, the inner teethes of ring gear is in constant mesh at outer point with the set of planetary gears, it is also known as annular ring.
[00067] In an embodiment, the sun gear 108 is the gear with angular cut teethes and is placed in the middle of the epicyclic gearbox; the sun gear is in constant mesh at inner point with the planetary gears and is connected with the input shaft of the epicyclic gear box.
[00068] In an embodiment, planet gears can be small gears used in between ring and sun gear, teethes of the planet gears are in constant mesh with the sun and the ring gear at both the inner and outer points respectively. The axis of the planet gears can be attached to the planet carrier which is carrying the output shaft of the epicyclic gearbox. The planet gears 104 can rotate about their axis and also can revolve between the ring and the sun gear 108 just like our solar system. The planet carrier 102 is a carrier attached with the axis of the planet gears 104 and is responsible for final transmission of the output to the output shaft.
[00069] In an embodiment, the rope/wire 126 used for the harness can pass through the drum 124 as shown in the figure. The load attached to the mechanism, during free fall, will rotate the main drum 124 with the help of rope/wire 126. The falling weight can rotate the drum 124 at a certain rpm. The drum 124 can be attached to an epicyclic gearbox through a spindle. The purpose of the gearbox here is to increase the input speed of rotation and to reduce the torque output at the sun gear. This increased rpm is fed to the DC motor 114 shaft by mounting the drum 124 on the same shaft as that of the sun gear 108. This drum 124 can be connected to the DC motor 114 via belt. This rotational input provided at the shaft of the DC motor 114, causes it to function like a generator, creating a certain voltage across its terminals. The DC motor 114 can be connected to the LED 112 in series. The LED 112 draws the current from motor 114. Every LED 112 has a cut-off voltage. This cut-off voltage regulates the voltage in the circuit, and thus the current. Any additional voltage generated by the motor 114 due to the freely falling load is blocked by the LED 112, thus causing the resistance. This resistance induces a phenomenon called magnetic locking in the motor 114 and prevents the shaft of the motor from turning any faster. In other words, LED 112 when used in series with the DC motor 114 creates a certain kind of braking force. This braking force is utilized to restrict the freely falling motion of the load. Since, the motor 112 is connected to the main drum 124 through the gearbox. The restriction to the speed of the shaft of the motor 114 in turn restricts the main drum 124 from rotating any faster, thus controlling the speed of descend. The braking force is a result of magnetic locking phenomenon induced in the motor due to its connection with the LED and uses not contact or friction based principle generally used for braking.
[00070] FIG. 2 illustrates a graph of current in LED VS voltage across LED, in accordance with an exemplary embodiment of the present disclosure. As shown in FIG. 2, current of LED VS voltage across LED. Traditional bulbs require a lot of current to operate; LED’s on the other hand are different. If user applies a voltage across a LED, it draws no current until it gets to a certain threshold, and then it starts to draw current and emit light. But the voltage gets to a point where it won’t increase. This property if any LED is called the cut-off voltage (as shown in figure).
[00071] FIG. 3 illustrates an exemplary working of a proposed system, in accordance with an exemplary embodiment of the present disclosure. In an embodiment, the proposed system can include LED 112, generator 302, an epicyclic gear box 304, main rotating drum 124, and weight 306. In another embodiment, the main rotating drum 124 can be connected to epicyclic gear box 304. In another embodiment, due to LED 112 threshold voltage, the DC motor 114 is subjected to reduce in speed. In another embodiment, elliptical gear box 304 can assures uniform load distribution among planet gears 104, and increases the load carrying capacity for a given size due to increased point of contact between the gear teeth.
[00072] In an embodiment, when voltage is applied to the motor 114, the speed of the motor 114 is directly related to the volatge across its terminals. The generator 302 is just the opposite, if the voltage drawn from it is limited, the speed of the shaft is also limited to a certain rpm. When an LED 112 is connected to the motor acting as a generator 302, same principle comes into play. The cut-off voltage of the LED 112 limits the voltage drawn from the motor 114 and restricts the rpm of the shaft of the motor from turning any faster. In effect, the load can fall freely untill the motor reaches the speed at which it matches the cut-off voltage of the LED 112, after which the LED 112 can control the rpm of the shaft of the motor and the load can fall at a pre-designed speed of descend. So, when the mechanism is designed for 100 kg load, it means the gear-train can handle such loads. If you add 20 kg or 100 kg load, both the loads will fall at the same speed. Since the voltage in the circuit is constant irrespective of the load, the additional current generated can result in the braking torque.
[00073] FIG. 4 illustrates an isometric view of a proposed system, in accordance with an exemplary embodiment of the present disclosure. In an embodiment, the electro-mechanical system primarily can include a drum/pulley such as main drum 124 and secondary drum 402, the epicyclic gearbox 304, the motor 114, and at least one LED 112. The rope/wire 126 that can be used for the harness the load passes through the drum 124. The drum 124 can be attached to the epicyclic gearbox 304 through a spindle. The epicyclic gearbox (sun gear) can be connected to the motor 114 via a belt. When the load, attached to the rope, falls, results in rotation of the drum as well as the motor.
[00074] FIG. 5 illustrates a front view of a proposed system, in accordance with an exemplary embodiment of the present disclosure. In an embodiment, the electro-mechanical system primarily can include a drum/pulley such as main drum 124 and secondary drum 402, the epicyclic gearbox 304, the motor 114, and at least one LED 112. The rope/wire 126 that can be used for the harness the load passes through the drum 124. The drum 124 can be attached to the epicyclic gearbox 304 through a spindle. The epicyclic gearbox (sun gear) can be connected to the motor 114 via a belt 502. When the load, attached to the rope, falls, results in rotation of the drum as well as the motor.
[00075] FIG. 6 illustrates a top view of a proposed system, in accordance with an exemplary embodiment of the present disclosure. FIG. 7 illustrates an exploded view of a drum, in accordance with another exemplary embodiment of the present disclosure. FIG. 8 illustrates an exploded view of a ring gear, in accordance with another exemplary embodiment of the present disclosure. FIG. 9 illustrates an exploded view of a gear, a motor and LED, in accordance with another exemplary embodiment of the present disclosure.
[00076] It may be appreciated that, without any limitation, for example, the proposed mechanism is currently designed for lowering 100 kg of load at a rate of 1.4 m/s. However, by making small changes in the gear ratio and using a different size of motor, the load carrying capacity and the speed of descend can be varied as per requirement. Thus, it can be used in various industries from safety, construction, adventure sports and heavy lifting industry.
[00077] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, components, or steps that are not expressly referenced. Where the specification claims refers to at least one of something selected from the group consisting of A, B, C ….and N, the text should be interpreted as requiring only one element from the group, not A plus N, or B plus N, etc. The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the scope of the appended claims.
[00078] While embodiments of the present disclosure have been illustrated and described, it will be clear that the disclosure is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the scope of the disclosure, as described in the claims.
[00079] In the present invention, unless otherwise clearly defined and limited, the term "mounted," "connected," "connected," "fixed" and other terms to be broadly understood, for example, can be a fixed connection, it can be detachable connection, or integrally; can be mechanically connected, or may be electrically connected; can be connected directly, or indirectly through the intermediary may be connected, may be interaction between the two internal communicating elements or two elements. Those of ordinary skill in the art, it can be understood that the above terminology specific meaning in the present invention, depending on the circumstances.
[00080] In the description of the present specification, reference to the term "one embodiment," "an embodiments", "an example", "an instance", or "some examples" and the description is meant in connection with the embodiment or example described the particular feature, structure, material, or characteristic included in the present invention, at least one embodiment or example. In the present specification, the term of the above schematic representation is not necessarily for the same embodiment or example. Furthermore, the particular features structures, materials, or characteristics described in any one or more embodiments or examples in proper manner. Moreover, those skilled in the art can be described in the specification of different embodiments or examples are joined and combinations thereof.
[00081] All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
[00082] Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
[00083] The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
[00084] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE INVENTION
[00085] The present disclosure provides an electro-mechanical system which controls the speed of a descend device when a load, hanging at a certain height, needs to be lowered with the help of ropes or steel wires.
[00086] The present disclosure provides a mechanism that enables to achieve a constant speed of vertical descend without the intervention of an operator.
[00087] The present disclosure provides a compact controlled descend mechanism that is used as an emergency system in heavy lifting cranes, where the heavy load hanging at a certain height can be lowered at a controlled speed in case of any system failure.