FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
AND
THE PATENT RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
“CONFIGURATION FOR ADJUSTING THE OSCILLATOR
RANGE OF A FAN”
We, Bajaj Electricals Limited, an Indian National, of 45/47, Veer Nariman Road, Fort Mumbai- 400001, India.
The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF INVENTION
The present invention relates to the field of consumer electronic goods. In particular, the present invention relates to fans, more particularly, a configuration for adjusting the oscillator range of a head of a fan.
BACKGROUND OF THE INVENTION
Generally, pedestal fans have a base with a vertical stand to which a motor housing is mounted. The motor housing further mounts the fan blades. When the motor is turned on, the fan blades rotate to generate air movement. Furthermore, the fan blades are housed inside a fan outlet for safety purposes. The fan usually includes a control to switch on or off the swing operation of the fan. When the swing control is switched on, the fan outlet oscillates in a fixed pre-defined fixed arc. Typically, such fans have a single fixed arc, which is not adjustable.
In general, the fan outlet oscillates to cover a maximum area of the room in which the fan is placed. Conventionally, the fans utilize a gearbox mechanism or a linkage mechanism to achieve the desired oscillation range. For example, the conventional electric fans generally oscillate or swing in a fixed angle range of 80 to 100 degrees.
However, the conventional fan outlet can oscillate only in the fixed range of motion. For example, when a user switches on the swing operation, the fan outlet starts oscillating but only in the pre-defined fixed range of motion. In real-life situations, different users may require different oscillation angles as per their requirement. There is no such option for the user to change the oscillation range of the fan outlet of the electric fan.
In light of the above, there is a need in the art for fan configuration with a simple variable oscillation mechanism.

SUMMARY OF THE INVENTION
This summary is not intended to identify the essential features of the invention nor is it intended for use in determining or limiting the scope of the claimed subject matter.
In an aspect of the present invention, there is provided a configuration for adjusting the oscillator range of a head of a fan, the configuration comprising: a link-bar having a first end and a second end, the first end connected to a follower, and the second end connected to at least a part of a fan motor housing; a guide screw having a first end and second end; and a rotary knob; wherein the oscillator range of the head of the fan can be adjusted by changing the position of the first end of the link-bar between a first position on the guide screw and a second position on the guide screw.
In an aspect of the present invention, in the configuration, the follower is adapted to move between a first position on the guide screw and a second position on the guide screw.
In an aspect of the present invention, in the configuration, the rotary knob is adapted to facilitate the travel of the follower between a first position on the guide screw and a second position on the guide screw.
In another aspect of the present invention, there is provided a method for adjusting the oscillator range of the head of the fan, the method comprising: rotating a rotary knob for facilitating the travel of a follower between a first position on a guide screw and a second position on the guide screw, said rotatory knob, follower, and guide screw comprised in a configuration for adjusting the oscillator range of the head of the fan, the configuration comprising: a link-bar having a first end and a second end, the first end connected to the follower, and the second end connected to at least a part of a fan motor housing; the guide screw having a first end and

second end; and the rotary knob; wherein the oscillator range of the head of the fan can be adjusted by changing the position of the first end of the link-bar between a first position on the guide screw and a second position on the guide screw.
In yet another aspect of the present invention, there is provided a fan system comprising a fan; and a configuration for adjusting the oscillator range of a head of a fan, the configuration comprising: a link-bar having a first end and a second end, the first end connected to a follower, and the second end connected to at least a part of a fan motor housing; a guide screw having a first end and second end; and a rotary knob; wherein the oscillator range of the head of the fan can be adjusted by changing the position of the first end of the link-bar between a first position on the guide screw and a second position on the guide screw.
BRIEF DESCRIPTION OF THE ACCOMPANYING FIGURES
The following drawings form part of the present specification and are included to further illustrate aspects of the present disclosure. The disclosure may be better understood by reference to the drawings in combination with the detailed description of the specific embodiments presented herein.
Figure 1 is an isometric view of a configuration for adjusting oscillator range of a head of a fan, in accordance with an embodiment of the present invention.
Figure 2 is a top view of the configuration for adjusting oscillator range of the head of the fan, in accordance with an embodiment of the present invention.
Figure 3 is an exploded view of a fan system, in accordance with an embodiment of the present invention.
Figure 4 is a side view of the fan system, in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION
Those skilled in the art will be aware that the invention described herein is subject to variations and modifications other than those specifically described. It is to be understood that the invention described herein includes all such variations and modifications. The invention also includes all such features referred to or indicated in this specification, individually or collectively, and any and all combinations of any two or more of said features.
For convenience, before further description of the present invention, certain terms employed in the specification, examples are collected here. These definitions should be read in light of the remainder of the disclosure and understood as by a person of skill in the art. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by a person of ordinary skill in the art. The terms used throughout this specification are defined as follows, unless otherwise limited in specific instances.
As used in the specification and the claims, the singular forms “a”, “an”, and “the” include plural referents unless the context clearly dictates otherwise.
The present disclosure is not to be limited in scope by the specific embodiments described herein, which are intended for the purposes of exemplification only.
The present invention provides a configuration 100 for adjusting the oscillator range of a head of a fan, the configuration comprising: a link-bar 102 having a first end 104 and a second end 106, the first end 104 connected to a follower 108, and the second end 106 is connected to at least a part of a fan motor housing 110; a guide screw 112 having a first end 114 and second end 116; and a rotary knob 118; wherein the oscillator range of the head of the fan can be adjusted by changing the

position of the first end 104 of the link-bar 102 between a first position on the guide screw 112 and a second position on the guide screw 112.
In an embodiment, the link bar 102 is essentially a metal strip. In another embodiment, the link bar 102 is essentially a metal rod. In a preferred embodiment, the first end 104 and the second end 106 of the link bar 102 connecting with the follower 108 and part of the fan motor housing 110 respectively, are on different planes. In a preferred embodiment, the first end 104 of the link bar connecting the follower 108 is at a lower plane compared to the second end 106 of the link bar 102 connecting to at least part of the fan motor housing 110. In an embodiment, the link bar 102 can have at least a curved section, and at least a straight section.
In an embodiment, the link bar 102 can be a single curved section. In another embodiment, the link bar 102 can comprise of at least two or more curved sections of same or different radii of curvature defining each of the curves. In yet another embodiment, the link bar 102 can be a single straight section. In another embodiment, the link bar 102 can comprise at least two or more straight sections, each section connected with the adjacent section at an angle. In an embodiment, the multiple straight sections can be of same or different lengths.
The fan motor housing 110 houses a fan motor (not shown in figures). Conventionally, the fan motor housing 110 rotates a spindle (not shown in figures), which, at one end, is attached to the fan motor housing 110 and at other end, attached to fan blades 308. Upon rotation of the spindle, the fan blades 308 also rotate to provide the air flow.
In an embodiment, the first end 104 is connected to the follower 108 with a screw. In another embodiment, the first end 104 is welded to the follower 108. It is understood by a person skilled in the art that the connection of the first end 104 to the follower 108 is not limited to the particular embodiments disclosed herein. Any other mechanism known in the art which achieves a connection between the first

end 104 and the follower 108 can be reasonably and readily implemented, which is within the scope of the present invention.
In an embodiment, the second end 106 is connected to at least the part of the fan motor housing 110 with a screw. In another embodiment, the second end 106 is welded to at least the part of the fan motor housing 110. It is understood by a person skilled in the art that the connection of the second end 106 to at least part of the fan motor housing 110 is not limited to the particular embodiments disclosed herein. Any other mechanism known in the art which achieves a connection between the second end 106 and at least part of the fan motor housing 110 can be reasonably and readily implemented, which is within the scope of the present invention.
The configuration 100 comprises a guide screw 112 having the first end 114 and the second end 116. The configuration 100 comprises the rotary knob 118 connected with the first end 114 of the guide screw 112 and is capable of axial rotation of the guide screw 112. The follower 108 is adapted to travel between at least a first position on the guide screw 112 and at least a second position on the guide screw 112. The travel distance of the follower 108 between a first and a second position on the guide screw 112 is facilitated by the rotary action of the rotary knob 118. In an embodiment, the rotary knob 118 can be rotated in clockwise direction. In another embodiment, the rotary knob 118 can be rotated in anticlockwise direction.
The oscillator range of the head of the fan can be adjusted by changing the position of the follower 108 on the guide screw 112 between a first position and a second position. In an example, the first position is a position of the follower 108 on the guide screw 112 proximal to the first end 114 and the second position is a position of the follower 108 on the guide screw 112 proximal to the second end 116. In an example, a position of the follower 108 on the guide screw 112 between the first position and the second position thereon corresponds to an oscillation arc. The oscillation arc varies according to the position of the follower 108 on the guide

screw 112. In an embodiment, the difference of oscillation arc between any two adjacent positions of the follower 108 on the guide screw 112 is constant. In another embodiment, the difference of oscillation arc between any two adjacent positions of the follower 108 on the guide screw 112 can vary.
In an embodiment, the rotary knob 118 may be rotated clockwise to move the follower 108 between a first position and a second position on the guide screw 112 to increase the oscillation arc. In an embodiment, the rotary knob 118 may be rotated anticlockwise to move the follower 108 between a first position and a second position on the guide screw 112 to increase the oscillation arc.
In an embodiment, the rotary knob 118 may be rotated anticlockwise to move the follower 108 between a first position and a second position on the guide screw 112 to decrease the oscillation arc. In an embodiment, the rotary knob 118 may be rotated clockwise to move the follower 108 between a first position and a second position on the guide screw 112 to decrease the oscillation arc.
Figure 1 is an isometric view of the configuration 100 for adjusting the oscillator range of the head of the fan, in accordance with an embodiment of the present invention. In a non-limiting example of the present invention, as seen in Figure 1, the configuration 100 essentially comprises a link bar 102 having a first end 104 connected to a follower 108 coupled with a guide screw 112, and the second end of the link bar 102 is connected to at least a part of the fan motor housing 110. The first end 104 of the link bar 102 is at a higher plane than the second end 106 of the link bar 102. The link bar 102 comprises a curved component proximal to the second end 106 and a series of straight sections connected at an angle to each other. The link bar 102 is a flat metal bar in the present exemplary example. The follower 108 is coupled with the guide screw 112. Other implementations of the follower 108 and guide screw 112 are also possible. The position of the follower 108 on the guide screw 112 can be changed by rotating the rotary knob 118, which is in connection with the guide screw 112. Change in distance of the follower 108 from

the first end 114 or the second end 116 of the guide screw 112 changes the oscillator range of the head of the fan.
Figure 2 is a top view 200 of the configuration 100 for adjusting oscillator range of the head of the fan, in accordance with an embodiment of the present invention. As seen in Figure 2, there is provided a first length L1, a second length L2, a third length L3, and a fourth length L4. While L3 and L4 are fixed, L1 can be adjusted by rotating the rotary knob 118, thus resulting in different oscillator range of the head of the fan.
The present invention also provides a fan system (not shown), comprising a fan (not shown) and a configuration 100 as described substantially in the present disclosure. In a particular non-limiting example, the fan system is a pedestal fan comprising a base, a vertical rod (which can be telescopic), a fan motor body and fan blades. The fan may also comprise a switch assembly comprising at least a switch to control one or more functions of the fan, such as, but not limited to, switching the fan on or off, control speed of fan blades, switching the fan oscillator on or off. In an embodiment, the switch function may also be remotely operable. In an embodiment, the fan is a table fan. In another embodiment, the fan is a wall mounted fan. It is understood that in case where the fan is a wall mounted fan or a table fan, the fan may not comprise a vertical rod.
Figure 3 is an exploded view 300 of a fan system, in accordance with an embodiment of the present invention. The fan system comprises a front guard 302, a blade lock nut 304, a guard ring 306, fan blades 308, a guard lock nut 310, a back guard 312, a control panel 314, a front lid 316, an oscillation control mechanism 318, a fan motor housing 110, a motor cowl 320, a swing selector 322, and the link bar 102. Figure 4 is a side view 400 of the fan system, in accordance with an embodiment of the present invention.

The fan blades 308 are assembled within the front guard 302 and the back guard 312 using the blade lock nut 304 and the guard lock nut 310 to prevent a user from accidentally coming in contact with the fan blades 308, especially when the fan blades 308 are rotating. In addition, the guard ring 306 is positioned around the front guard 302 and the back guard 312. As depicted in Figure 3, the front guard 302 and the back guard 312 are suitably meshed to allow the airflow therethrough.
The control panel 314 encompasses all the electrical or electronic components required to operate the fan system. For example, the control panel 314 includes various switches that enables the user to change the speed setting of the fan blades 308. For example, the control panel 314 may include a switch S1 that sets a first speed of the fan blades 308, a switch S2 that sets a second speed of the fan blades 308, a switch S3 that sets a third speed of the fan blades 308, and a switch S4 that sets a fourth speed of the fan blades 308. Moreover, the fourth speed is more than the third speed, the third speed is more than the second speed, and the second speed is more than the first speed.
The link-bar 102 along with oscillation control mechanism 318 realise adjustment of the oscillator range of the fan system. The motor within the fan motor housing 110 is mechanically coupled with fan blades 308 to rotate the fan blades 308. The fan motor housing 110 is covered using the motor cowl 322 to prevent dust accumulation or damage to the motor assembly 320. The motor cowl 320 also has an opening for the swing selector 322. The swing selector 322 controls the oscillation or swinging motion of the head of the fan.
The present invention also provides a method for adjusting the oscillator range of a head of a fan, the method comprising: rotating a rotary knob 118 for facilitating the travel of a follower 108 between a first position on a guide screw 112 and a second position on the guide screw 112, whereby, the rotary knob 118, follower 108, and guide screw 112 are comprised in a configuration 100 as substantially described herein.

ADVANTAGES OF THE PRESENT INVENTION
The configuration of the present invention enables users to vary the swing (oscillation) range of a fan (i.e., head of a fan) as per requirement. The configuration allows for a very high level of customized swing range, enabling the user to precisely control the swing range to an accuracy of 0.1°. In addition, the configuration facilitates varying the swing angle with very little mechanical effort.
LIST OF REFERENCE NUMERALS
100 – Configuration
102 – Link-bar
104 – First end
106 – Second end
108 – Follower
110 – Fan motor housing
112 – Guide screw
114 – First end
116 – Second end
118 – Rotary knob
L1 – First length
L2 – Second length
L3 – Third length
L4 – Fourth length
200 – Top view
300 – Exploded view
302 – Front guard
304 – Blade lock nut
306 – Guard ring
308 – Fan blades

310 – Guard lock nut
312 – Back guard
314 – Control Panel
316 – Front lid
318 – Oscillation control mechanism
320 – Motor cowl
322 – Swing selector
400 – Side view

I/We Claim:
1. A configuration (100) for adjusting the oscillator range of a head of a fan,
the configuration (100) comprising:
a link-bar (102) having a first end (104) and a second end (106), the first end (104) connected to a follower (108), and the second end (106) connected to at least a part of a fan motor housing (110);
a guide screw (112) having a first end (114) and second end (116); and
a rotary knob (118);
wherein the oscillator range of the head of the fan can be adjusted by changing the position of the first end (104) of the link-bar (102) between a first position on the guide screw (112) and a second position on the guide screw (112).
2. The configuration (100) as claimed in claim 1, wherein the follower (108) is adapted to move between a first position on the guide screw (112) and a second position on the guide screw (112).
3. The configuration (100) as claimed in claim 2, wherein the rotary knob (118) is adapted to facilitate the travel of the follower (108) between a first position on the guide screw (112) and a second position on the guide screw (112).
4. A method for adjusting the oscillator range of the head of the fan, the method comprising:
rotating a rotary knob (118) for facilitating the travel of a follower (108) between a first position on a guide screw (112) and a second position

on the guide screw (112), said rotatory knob (118), follower (108), and guide screw (112) comprised in a configuration (100) as claimed in claim 1.
5. A fan system, comprising: a fan; and a configuration (100) as claimed in claim 1.