FIELD OF THE INVENTION
This invention is a device for descending and retraction of personnel or goods during emergency situations while there is a power failure or no power condition.
BACKGROUND
In high rise buildings, during an emergency such as fire or earthquake, electrical power is shut off to prevent electrocution. Without electrical power, elevators do not work, and the only way down from a high rise is using the stairs. Stairs are not user-friendly for the elderly, disabled and patients with medical conditions. The new invention offers a method to evacuate personnel or goods without the use of power, and it has a unique feature of retracting the lowering mechanism so multiple evacuations can be done repeatedly. The new invention ensures personnel or goods of varying weights all descent at the same speed. This device can also be used in places such as industries, offshore rigs, etc. to evacuate personnel or goods.
DISCUSSION OF THE PRIOR ART
US 20100252365 A1 titled “Personnel Transfer Device” discloses a personnel transfer device that belongs to the category of the one commonly used in offshore oil and gas operations, includes a means for lowering personnel from the device in a controlled manner, with the device in an elevated position. The personnel transfer device includes an automatic descender device fixed thereto. Such personnel transfer devices are typically elevated by cranes mounted on offshore platforms or drilling rigs and shift persons from elevated positions on the platform or drilling rig to and from the decks of boats. If there is a failure in the crane, during the personnel transfer procedure that would result in the device suspended in the air in an elevated position, personnel who are being transferred can use the automatic descender to lower themselves safely from the raised personnel transfer device to a waiting boat, the water's surface, etc.

US 8316991 B2 “Device of an evacuation system” discloses a concealed device of an evacuation system, in specific a foldable evacuation means that is arranged to be lowered from a parked folded up position on the vessel to be vacated to a stretched out position on a salvage device. The bottom section includes a weight device to keep the evacuation adequately extended in a use position, comprising a set of one or more cables/wires connected to a winch arrangement for lowering and lifting the evacuation means. The device is illustrated in that the weight appliance is arranged to be positioned on the salvage device, and the system includes means to balance for varying distances between the vessel to be evacuated and the rescue vessel.
US 4660677 A titled “Personnel evacuation apparatus for an offshore platform” discloses a personnel evacuation apparatus for use with an offshore platform. A launching ramp is mounted to the platform by a gimbal stowed in a vertical position with an endurance vessel secured at the entry end of the ramp. A release mechanism that can be activated from the deck of the platform enables flotation members secured to the ramp exit end, to turn the ramp about the gimbal to its deployed position. The gimbal further allows the ramp to maintain a usable orientation in spite of inclination of the deck of the platform by 25° due to pitch, roll or yaw. The exit end will revolve under wave action so as to gravity launch the survival vessel downwind and, upon release of the boat lock, carry the container safely away from the platform.
US 20140291070 A1 titled "Public Building and School Evacuation System" discloses a building evacuation system for the occupants to escape pursuit or peril, such as fire, violence, natural catastrophe, or other emergency utilizing a deployed emergency exit integrated into a building's outer wall, like a hinged latched window consisting an emergency exit deployment actuator mounted near the emergency exit that will simultaneously deploy an inflatable chute at the emergency exit, initiate an internal audio and/or visual indicator to a central location to announce that the emergency exit has been deployed, and instigate an

automated text or voice message to appropriate authorities stating the location at which the emergency exit has been deployed.
US 6684978 B1 titled “Building evacuation system” discloses an evacuation system for a building in which at least one vertical evacuation chute is offered for each floor of a building to be evacuated. A plurality of collapsible buckets is stored on each floor and, after loading, is slid along horizontal rails to the vertical chute where they employ multiple vertical guide tracks. The guide tracks are provided with tapered brake pads in order to provide progressively amplifying braking force on the falling buckets. A sloping slide is provided adjoining a lower open end of the chute to slidably transport the bucket and evacuee to the ground.
US 4640384 A titled “Emergency evacuation system for high-rise buildings” discloses an emergency evacuation system for a high-rise building having a cable carried on a spool located on the top of the building, such cable having at its end remote from the spool a weighted coupler dimensioned to be obtained by a powered spool carried within an escape cabin, such escape cabin having an entry-exit side and crawler means held on that entry-exit side for engaging the building in facilitating smooth raising and lowering of the cabin.
The proposed invention is a device for descending and retraction of personnel or goods used in high rise building that includes retraction feature which can operate without any kind of external power supply, and the speed is consistent irrespective of the weight of the person.
SUMMARY OF THE INVENTION
The device of this invention allows for descending and retraction of personnel or goods from varying heights at a fixed speed. The speed of descent is automatically regulated and maintained at 1 m/s irrespective of the weight of the occupant. The device has an automated retrieval mechanism that allows for retraction of the body harness such that additional personnel can be lowered. This device does not

use any form of external energy like electrical or battery to regulate the descent speed.
The descent speed is maintained independent of the weight and does not require any peripheral energy for lowering as well as retraction of the harness for multiple evacuations.
This invention is a device for descending and retraction of personnel or goods with automatic speed control using energy dissipation mechanism having, a closed hook, a yoke, a rivet, one or more fasteners, a guide wheel, a cable, multiple clamps, bracket, (i) rollers, upper brackets, spacer elements, a locking lever, structural side panels, drum winding unit, and speed regulation unit. The fasteners are fastener-f1, fastener-f2, fastener-f3, fastener-f4, fastener-f5, fastener-f6, fastener-f7, fastener-f8 and fastener-f9. The rivet is rotationally free moving one and connects the closed hook to the yoke. The cable is connected onto itself by the multiple clamps and held together by the fastener-f2 and said cable loops around the guide wheel which in turn is connected to the yoke through the fastener-f1. The cable is guided by the two rollers connected to the bracket by means of the fastener-f3, said rollers prevent side to side movement of the cable during the descent and retraction. The bracket is connected to the structural side panels and by means of the fasteners-f8, and said side panels and in turn, is connected to the upper brackets, via the fasteners-f4. The structural side panels and are held apart rigidly by the spacer elements, and the bracket is rigidly connected to the upper bracket and retains the locking lever. The upper brackets and of the device are rigidly bolted to either a balcony ceiling or some structural member in a high rise using the fastener-f5.
The device rewinds the personnel or goods attachment feature through the drum winding unit having, a translating guide, a double helix self-reversing screw, a retainer brace, a rope drum, gears, and gear trains. The gears are gear-g1, gear-g2, gear-g3, gear-g4, gear-g5, gear-g6, and gear-g7, the gear-g1 meshes with the compound gear-g2, g3 and said compound gear-g2, g3 meshes with gear-g4. The gear-g1 is rigidly connected to the drum. The cable exits the translating guide and

winds on the rope drum which is rigidly attached to the gear-g5 that meshes with the gear-g6 meshing with a gear-g7 that is rigidly attached to the double helix self-reversing screw. The translating guide has an internal thread that mates with the double helix self-reversing screw. The mechanism of drum winding during the retraction comprises of, as the cable is wound onto the drum, the gear pair ensures transverse motion of the translating guide is in sync with the pitch of the winding, this allows for uniform winding of the cable on the drum as the translating guide slides are left- right and reverses continuously back and forth to allow continuous uniform guidance and winding of the cable on the drum, and the retainer brace is attached to the structural side panel via the fastener-f6, said retainer brace holds an energy spring in place. As the drum rotates during the descent of the cable, the gear train-g1, g2, g3, amplifies the rotational speed of the drum element and transfers it to the gear-g4.
In this invention, the speed regulation unit comprising, a shaft, a support plate, rotary mass elements, bearings, a slider sleeve, a plate, multiple compression elements, a pressure plate, multiple clutch, a carrier, a thrust bearing, an energy spring, a rotational handle, a gear train, and one way bearing. The gear-g4 is connected to the shaft via the one-way bearing and the support plate, for speed regulation mechanism is rigidly fastened to the shaft by the fastener-f7. The two rotary mass elements are attached to support the plate via the bearing, the rotary mass element presses against a slider sleeve which in turn presses on the plate via the thrust bearing. The plate pushes on multiple compression elements which in turn press against the pressure plate, and said pressure plate presses on the multiple clutches which are supported by the carrier. The carrier has the rigidly connected gear-g5 meshing with the gear-g6 which in turn meshes with the gear-g7. The gear-g6 is rigidly connected to the drum which is supported by the bearings on either side. The rotational handle is rigidly connected to the energy spring, and the gear-g6 interfaces and allows for a manual rotation from an external input. The upper attachment brackets gear train is rigidly attached via the fastener-f9, said gear train meshes with the gear train which is connected to the shaft via the one-way bearing. The retainer brace is attached to the structural side

panel via the fastener-f6 and said retainer brace holds the energy spring in place. The gear-g6 is connected to the energy spring thereby causing the winding and unwinding of the spring based on the direction of rotation of the gear-g6. As the drum rotates during the descent of the cable, the gear train-g1, g2, g3 amplifies the rotational speed of the drum element and transfers it to the gear-g4.
During retraction, as the cable is wound onto the drum, the gear pair ensures the transverse motion of the translating guide is in sync with the pitch of the winding, thus allows for uniform winding of the cable on the drum as the translating guide slides left- right and reverses continuously back and forth to allow continuous uniform guidance and winding of the cable on the drum.
The method of operation of the device is as follows. An interlocking person or goods need to be evacuated on a body harness to the hook. Transferring body weight of the person or goods to be evacuated to a ceiling by the device, as the person steps off or the goods are unloaded from a ledge either of a building or structure. Pulling the locking lever to release the locking feature, once the person or goods are stabilized. Beginning to unwind the cable due to the person’s or goods weight and speeding up the rotation of the drum to unwind. Rotating the meshing gear-g1, g2, g3, g4 begins due to the unwinding of the drum. Engaging the shaft via the one-way bearing by the gear-g4 and increasing the speed of the shaft, and rotating the masses element due to the rotation of the shaft. Pushing of the slider sleeve as centrifugal force of masses leads to their rotation about its center about the bearing, the said motion of the slider sleeve compresses the clutch to be compressed via movement of following elements, the thrust bearing, plate, compression elements, pressure plate. Increasing friction force as the speed of descent increases which also amplifies the friction at the clutch and the increased speed leads to slowing down of the carrier. Slowing the drum unwinding which is connected to the carrier via gear-g5, g6, g7 elements and this closed loop feedback regulates the descent speed independent of the weight of personnel or goods. Winding the energy spring as the person or goods continue to descent due to the rotation of the gear-g6. Removing the body harness and exiting

on a complete descent. Retracting the body harness automatically by the energy spring without the need for external power. Revolving the shaft via the gear trains and one-way bearing element while the drum winds. Engaging the one-way bearing element during descent and engaging the one-way bearing element during retraction, as the one-way bearing elements and are configured to engage in opposite direction of rotation. Regulating retraction speed similar to the descent regulation via the clutch mechanism. Regulating speed of retraction similar to the regulation of the speed of descent, as the drum rotates it causes the rotation of the gear-g5 which in turn causes the rotation of gears-g6 and gears-g7 thereby regulation of retraction speed.
The device has a manual rewind option facilitated by the rotation handle. The device is attached either to a ceiling of a balcony or a structural member in a high rise structure by means of the multiple fasteners-f5.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows the isometric view of the device of the present invention.
Figure 2 shows the side view of the device with the cover removed.
Figure 3 shows the sling details.
Figure 4(a) shows the ISO view of cable exit guide.
Figure 4(b) shows the cable exit guide.
Figure 4(c) shows the Section AA - details of cable exit guide.
Figure 5 shows the upper attachment brackets.
Figure 6(a) shows the drum winding mechanism.
Figure 6(b) shows the rear ISO view Spring.
Figure 7(a) shows the top ISO view drum gear train.
Figure 7(b) shows the bottom ISO view drum gear train.
Figure 8(a) shows the speed regulation mechanism.
Figure 8(b) shows the sectional detail of speed regulation mechanism.
Figure 8(c) shows the front ISO view Spring.

Figure 9 shows the retraction speed regulation.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Figure 1 shows the isometric view of the device of the present invention with the overall construction. The device is attached to a structure either in a balcony or on a frame as needed. The lower hook is attached to a body harness that is worn by the descending personnel or goods. Figure 2 is the cover removed side view that shows the internal construction of the device. The cable is guided to ensure smooth operation of the wire descending and retraction. The device has a closed hook 1 connected to a yoke 2 by a rotationally free moving rivet 3. A cable 6 loops around a guide wheel which in turn is connected to the yoke 2 through a fastener-f1 4. The cable 6 is guided by two rollers that is connected to a bracket 9 by means of a fastener-f3 10. The device is attached to the ceiling of a balcony or a structural member in a high rise building or structure by means of multiple fasteners-f5 14. A bracket 49 is rigidly connected to the upper bracket and retains a locking lever 48. The drum winding mechanism shows the cable 6 entering a translating guide 16 which has an internal thread that mates with a double helix self-reversing screw 17. There is a uniform winding of the cable on the drum as the translating guide 16 slides are left- right and reverses continuously back and forth to allow continuous uniform guidance and winding of the cable 6 on the drum 20. A retainer brace 18 is attached to the structural side panel via the fastener-f6 19.
Figure 3 includes the sling details that consist of a closed hook 1 connected to a yoke 2 by a rotationally free moving rivet 3. The rivet 3 allows for rotation of the closed hook 1 and prevents inadvertent winding of a cable 6 during descent or retraction. The cable 6 is connected onto itself by multiple clamps 7a and 7b held together by a fastener-f2 8. The cable 6 loops around a guide wheel 5 which in turn is connected to the yoke 2 through the fastener-f1 4.

Figure 4(a) is the ISO view of a cable exit guide that shows the guidance method for the cable 6 as it enters the device. Figure 4(c) provides Section AA - details of the cable exit guide with sectional details of the cable exit guide shown in Figure 4(b). The cable 6 is guided by two rollers 11 that are connected to a bracket 9 by means of a fastener-f3 10. These rollers prevent side to side movement of the cable 6 during descending and retraction. The cable 6 is connected onto itself by multiple clamps 7a and 7b held together by a fastener-f2 8. The upper attachment brackets with the bracket 9 are connected to the structural side panels 51a and 51b by the fasteners-f8 element 50 and are held apart rigidly by the spacer element 15c.
Figure 5 shows upper attachment brackets with bracket 9 connected to structural side panels 51a and 51b by means of fasteners-f8 element 50. The side panels 51a and 51b, in turn, are connected to upper bracket 12a and 12b via fasteners-f4 13. The upper brackets 12a and 12b are rigidly bolted to either a balcony ceiling or some structural member in a high rise using a fasteners-f5 14. The two structural side panels 51a and 51b are held apart rigidly by spacer elements 15a, 15b, and 15c. A bracket 49 is rigidly connected to the upper bracket 12a and retains a locking lever 48.
Figure 6(a) is the drum winding mechanism that shows the cable 6 entering a translating guide 16 via roller 11 similar as shown in Figure 4(c), Section AA -details of cable exit guide. The cable 6 exits the translating guide 16 and winds on a rope drum 20. The rope drum 20 has a rigidly attached gear-g5 37 that meshes with a gear-g6 38 meshing with gear-g7 39 that is rigidly attached to a double helix self-reversing screw 17 as in Figure 6(b) that shows rear ISO view Spring. The translating guide 16 has an internal thread that mates with the double helix self-reversing screw 17. During retraction, as the cable 6 is wound onto the drum 20, the gear pair 38, 39 ensures the transverse motion of the translating guide 16 is in sync with the pitch of the winding. This allows for uniform winding of the cable on the drum as the translating guide 16 slides are left- right and reverse continuously back and forth to allow continuous uniform guidance and winding of

the cable 6 on the drum 20. A retainer brace 18 is attached to the structural side panel 51b via the fastener-f6 19. The retainer brace holds an energy spring 41 in place.
Figures 7(a) and 7(b) is the top and bottom ISO view drum gear train respectively, that displays the rigid connection of gear-g1 21 to the drum 20. The gear-g1 21 meshes with compound gear-g2, g3 22, 23. The compound gear-g2, g3 22, 23 meshes with gear-g4 24. As the drum 20 rotates during the descent of the cable 6, this gear train-g1, g2, g3 21, 22, 23 amplifies the rotational speed of the drum element 20 and transfers it to the gear-g4 24.
Figure 8(b) gives the sectional detail of speed regulation mechanism that shows the gear-g4 24 connected to a shaft 25 via a one-way bearing 47. A support plate 26 as shown in Figure 8(a) for speed regulation mechanism is rigidly fastened to the shaft 25 by the fastener-f7 27. Two rotary mass elements 28a and 28b are attached to support the plate 26 via the bearing 29. The rotary mass element 28a presses against a slider sleeve 30 which in turn presses on a plate 31 via a thrust bearing 36. The plate 31 pushes on multiple compression elements 32 which in turn press against a pressure plate 33. The pressure plate 33 presses on the multiple clutches 34 which are supported by the carrier 35. The carrier 35 has the rigidly connected gear-g5 37 meshing with the gear-g6 38 which in turn meshes with the gear-g7 39.
Figure 8(c) is the front ISO view spring that shows the gear-g6 38 is connected to an energy spring 41 thereby causing the winding and unwinding of the spring 41 based on the direction of rotation of the gear-g6 38. The gear-g6 38 is rigidly connected to the earlier said drum 20. The drum 20 is supported by bearings element 40 on either side. A rotational handle 42 is rigidly connected to the energy spring 41 and the gear-g6 38 interfaces and allows for a manual rotation from an external input. From Figure 5 the upper attachment brackets gear train 43 is rigidly attached via a fastener-f9 element 44. The gear train 43 meshes with the gear train 45 which is connected to shaft 25 via a one-way bearing 46 as seen in Figure 9 that shows the retraction speed regulation.

The device as shown in Figure 1 is attached to the ceiling of a balcony or a structural member in a high rise building or structure by means of multiple fasteners-f5 14. A person or goods needing to be evacuated on a body harness that is interlocked to the hook 1. As the person steps off or the goods are unloaded from the ledge of the building or the structure, the weight is transferred to the ceiling by the device structure. Once the person or goods are stabilized, the locking lever 48 is pulled, releasing the locking feature. Due to the weight of the device, the cable 6 starts to unwind and speeds up the rotation of the drum 20 to unwind. As the drum unwinds, the meshing gear-g1, g2, g3, g4 elements 21,22,23,24 begin to rotate. The gear-g4 24 engages the shaft 25 via the one-way bearing 47 and increases the speed of the shaft 25. As the shaft 25 rotates, it causes the rotation of the masses element 28a and 28b. The centrifugal force of the masses leads to their rotation about its center about the bearing 29 and pushes the slider sleeve 30. The said motion of the slider sleeve 30 compresses the clutch 34 to be compressed via the movement of the elements 36, 31, 32, 33. The increase in friction at the clutch depends on the speed of descent of the person or goods. As the speed increases, the friction force increases proportionally, and the increased speed results in slowing down of the carrier 35. As the carrier 35 being connected back to the drum element 20 via gear-g5, g6, g7 elements 37, 38, 39 thereby slowing the drum unwinding. This closed loop feedback regulates the descent speed independent of the weight of the person or goods descending.
As the person or goods continue to descent, the rotation of the gear-g6 38 causes the winding of the energy spring 41. Upon complete descent, the person removes the body harness, or the goods are removed and exits. The energy spring element 41 automatically retracts the body harness without the need for external power. As the drum 20 winds, its rotation causes the shaft 25 to revolve via the gear trains 43, 45 and one-way bearing element 46. The one-way bearing elements 46 and 47 are configured to engage in opposite direction of rotations, the one-way bearing element 47 engages during descent, and one-way bearing element 46 engages during retraction. Retraction speed is regulated similarly to the descent regulation via the clutch mechanism. As the drum element 20 rotates, it causes the rotation of

the gear-g5 37 which in turn causes the rotation of gears-g6 38 and gears-g7 39 thereby regulating the speed of retraction similar to the regulation of the speed of descent. Manual retraction can be done by the rotation handle 42.
In this invention, the device that allows for lowering with automatic speed control using energy dissipation device for personnel or goods utilizing a clutch mechanism, a governor to regulate speed, and automatically rewinds. Also, stores potential energy while lowering personnel or goods through spring energy storage. Further, said device rewinds the personnel or goods attachment feature (it rewinds cable and pulls back the harness to the top) regulates the rewind speed and enables manual rewind option.

1. A device for descending and retraction of personnel or goods with automatic speed control using energy dissipation mechanism 41 having,(a) a closed hook 1, (b) a yoke 2, (c) a rivet 3, (d) one or more fasteners f (4, 8, 10, 13, 14, 19, 27, 44, 50), (e) a guide wheel 5, (f) a cable 6, (g) multiple clamps (7a, 7b), (h) bracket (9, 49), (i) rollers 11, (j) upper brackets (12a, 12b), (k) spacer elements (15a, 15b, 15c), (l) a locking lever 48, (m) structural side panels (51a, 51b), (n) drum winding unit, and (o) speed regulation unit, wherein:
(i) The fasteners are fastener-f1 4, fastener-f2 8, fastener-f3 10, fastener-f4 13, fastener-f5 14, fastener-f6 19, fastener-f7 27, fastener-f8 50, fastener-f9 44; (ii) The rivet 3 is rotationally free moving one and connects the closed
hook 1 to the yoke 2; (iii) The cable 6 is connected onto itself by the multiple clamps 7a and 7b held together by the fastener-f2 8 and said cable 6 loops around the guide wheel 5 which in turn is connected to the yoke 2 through the fastener-f1 4; (iv) The cable 6 is guided by the two rollers 11 connected to the bracket 9 by means of the fastener-f3 10, said rollers 11 prevent side to side movement of the cable 6 during the descent and retraction; (v) The bracket 9 is connected to the structural side panels 51a and 51b by means of the fasteners-f8 50, and said side panels 51a and 51b in turn, are connected to the upper brackets 12a, 12b via the fasteners-f4 13;

(vi) The structural side panels 51a and 51b are held apart rigidly by the spacer elements 15a, 15b, 15c and the bracket 49 is rigidly connected to the upper bracket 12a and retains the locking lever 48; and
(vii) The upper brackets 12a and 12b of the device are rigidly bolted to either a balcony ceiling or some structural member in a high rise using the fastener-f5 14.
A device of Claim 1, rewinds the personnel or goods attachment feature through the drum winding unit having, (a) a translating guide 16, (b) a double helix self-reversing screw 17, (c) a retainer brace 18, (d) a rope drum 20, (e) gears, and (f) gear trains, such that, (i) The gears are gear-g1 21, gear-g2 22, gear-g3 23, gear-g4 24, gear-g5
37, gear-g6 38, and gear-g7 39, the gear-g1 21 meshes with the
compound gear-g2, g3 (22, 23) and said compound gear-g2, g3 (22,23)
meshes with gear-g4 24; (ii) The gear-g1 21 is rigidly connected to the drum 20; (iii) The cable 6 exits the translating guide 16 and winds on the rope drum
20 which is rigidly attached to the gear-g5 37 that meshes with the
gear-g6 38 meshing with a gear-g7 39, that is rigidly attached to the
double helix self-reversing screw 17; and (iv) The translating guide 16 has an internal thread that mates with the
double helix self-reversing screw 17. A device of Claim 1, wherein the mechanism of drum winding during the retraction comprises of: (i) As the cable 6 is wound onto the drum 20, the gear pair (38, 39) ensures
transverse motion of the translating guide 16 is in sync with the pitch
of the winding; (ii) Step (i) allows for uniform winding of the cable 6 on the drum as the
translating guide 16 slides are left- right and reverses continuously
back and forth to allow continuous uniform guidance and winding of
the cable 6 on the drum 20; and

(iii) The retainer brace 18 is attached to the structural side panel 51b via the fastener-f6 19, said retainer brace holds an energy spring 41 in place.
4. A device of Claim 1, wherein as the drum 20 rotates during descent of the cable 6, the gear train-g1, g2, g3 21, 22, 23 amplifies the rotational speed of the drum element 20 and transfers it to the gear-g4 24.
5. A device of Claim 1, wherein the speed regulation unit comprising, (a) a shaft 25, (b) a support plate 26, (c) rotary mass elements (28a, 28b), (d) bearings (29, 40), (e) a slider sleeve 30, (f) a plate 31, (g) multiple compression elements 32, (h) a pressure plate 33, (i) multiple clutch 34, (j) a carrier 35, (k) a thrust bearing 36, (l) an energy spring 41, (m) a rotational handle 42, (n) a gear train 45, and (o) one way bearing 47, such that,
(i) The gear-g4 24 is connected to the shaft 25 via the one-way bearing 47
and the support plate 26, for speed regulation mechanism is rigidly
fastened to the shaft 25 by the fastener-f7 27; (ii) The two rotary mass elements (28a, 28b) are attached to support the
plate 26 via the bearing 29, the rotary mass element 28a presses
against a slider sleeve 30 which in turn presses on the plate 31 via the
thrust bearing 36; (iii) The plate 31 pushes on multiple compression elements 32 which in
turn press against the pressure plate 33, and said pressure plate 33
presses on the multiple clutches 34 which are supported by the carrier
35; (iv) The carrier 35 has the rigidly connected gear-g5 37 meshing with the
gear-g6 38 which in turn meshes with the gear-g7 39; (v) The gear-g6 38 is rigidly connected to the drum 20 which is supported
by the bearings 40 on either side;

(vi) The rotational handle 42 is rigidly connected to the energy spring 41, and the gear-g6 38 interfaces and allows for a manual rotation from an external input;
(vii) The upper attachment brackets gear train 43 is rigidly attached via the fastener-f9 44, said gear train 43 meshes with the gear train 45 which is connected to the shaft 25 via the one-way bearing 46; and
(viii) The retainer brace 18 is attached to the structural side panel 51b via the fastener-f6 19 and said retainer brace 18 holds the energy spring 41 in place.
6. A device of Claim 1, wherein the gear-g6 38 is connected to the energy spring 41 thereby causing the winding and unwinding of the spring 41 based on the direction of rotation of the gear-g6 38.
7. A device of Claim 1, wherein as the drum 20 rotates during the descent of the cable 6, the gear train-g1, g2, g3 (21, 22, 23) amplifies the rotational speed of the drum element 20 and transfers it to the gear-g4 24.
8. A device of Claim 1, wherein during retraction, as the cable 6 is wound onto the drum 20, the gear pair (38, 39) ensures the transverse motion of the translating guide 16 is in sync with the pitch of the winding, thus allows for uniform winding of the cable on the drum as the translating guide 16 slides left- right and reverses continuously back and forth to allow continuous uniform guidance and winding of the cable 6 on the drum 20.
9. A method of operation of the device of Claim 1, comprising the steps of:
(i) Interlocking person or goods need to be evacuated on a body harness to the hook 1;
(ii) Transferring body weight of the person or goods to be evacuated to a ceiling by the device, as the person steps off or the goods are unloaded from a ledge either of a building or structure;

(iii) Pulling the locking lever 48 to release the locking feature, once the
person or goods are stabilized; (iv) Beginning to unwind the cable 6 due to the person’s or goods
weight and speeding up rotation of the drum 20 to unwind; (v) Rotating the meshing gear-g1,g2,g3,g4 (21, 22, 23, 24) begins due
to the unwinding of the drum 20; (vi) Engaging the shaft 25 via the one-way bearing 47 by the gear-g4
24 and increasing the speed of the shaft 25, and rotating the masses
element (28a, 28b) due to the rotation of the shaft 25; (vii) Pushing of the slider sleeve 30 as centrifugal force of masses leads
to their rotation about its center about the bearing 29, the said
motion of the slider sleeve 30 compresses the clutch 34 to be
compressed via movement of following elements, the thrust
bearing 36, plate 31, compression elements 32, pressure plate 33; (viii) Increasing friction force as the speed of descent increases which
also amplifies the friction at the clutch and the increased speed
leads to slowing down of the carrier 35; (ix) Slowing the drum 20 unwinding which is connected to the carrier
35 via gear-g5, g6, g7 elements (37, 38, 39) and this closed loop
feedback regulates the descent speed independent of the weight of
personnel or goods; (x) Winding the energy spring 41 as the person or goods continues to
descent due to the rotation of the gear-g6 38; (xi) Removing the body harness and exiting on complete descent; (xii) Retracting the body harness automatically by the energy spring 41
without the need of external power; (xiii) Revolving the shaft 25 via the gear trains (43, 45) and one-way
bearing element 46 while the drum 20 winds;

(xiv) Engaging the one-way bearing element 47 during descent and engaging the one-way bearing element 46 during retraction, as the one-way bearing elements 46 and 47 are configured to engage in opposite direction of rotation;
(xv) Regulating retraction speed similar to the descent regulation via the clutch mechanism; and
(xvi) Regulating speed of retraction similar to the regulation of the speed of descent, as the drum 20 rotates it causes the rotation of the gear-g5 37 which in turn causes the rotation of gears-g6 38 and gears-g7 39 thereby regulation of retraction speed.
0. A device of Claim 1, has a manual rewind option facilitated by the rotation handle 42.
1. A device of Claim 1, wherein the device is attached either to a ceiling of a balcony or a structural member in a high rise structure by means of the multiple fasteners-f5 14.