US1392320A

US1392320A - Elevator-door-operating mechanism

Info

Publication number: US1392320A
Application number: US409687A
Authority: US
Inventors: Claud L Fulghum
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-09-11
Filing date: 1920-09-11
Publication date: 1921-10-04
Anticipated expiration: 1938-10-04

Description

C. LFULGHUM.

IVELEVATOR DOOR OPERATING MECHANISM. APPLICATION HLED SEPT. H, 1920.

1,392,320, Patented Oct. 4, 1921.

2 SHEETS-SHEET I.

C. L. FULGHUM.

ELEVATOR DOOR OPERATING MECHANISM v APPLICATION FiLED SEPT. 11, I920- I I 1,3S;)2,320 Patented Oct. 4, 1921.

2SHEETS-SHEET 2 UNITED STATES ennui) L. FULGHUM, or QUINCY, ILLINOIS.

ELEVATOR-DOOR-OPERATING MECHANISM.

Specification of Letters Patent.

Patented Oct. 4, 1921.

Application filed September 11, 1920. Serial No. 409,687.

To all whom it may concern:

Be it known that I, CLAUD L. F ULGHUM, a citizen of the United States of America, and a resident of Quincy, county of Adams, and State of Illinois, have invented certain new and useful Improvements in Elevator- Door-Operating Mechanism, of which the following is a full and clear specification.

This invention has for its particularobject to provide a power device tobe carried by the elevator which will openand close the door thereof, or the door of the elevatorshaft, upon the operator pressing electric push-buttons in the car.

A further object of the invention is to provide a power device for opening and closing the door quickly and noiselessly, and also mechanism to prevent the door slamming but which at the same time Will throw the door to its extreme limit of travel.

A still further object is to provide a means which will out out the door-operating power device should the door become stalled in its travel to a closed-position, and also another means for cutting out the elevator circuit when the door is open.

These and other objects are attained by the means illustrated in the accompanying drawing, in which- I Figure 1 is a plan view of the improved door-operating mechanism;

Fig. 2 is a side elevation thereof;

Fig. 3 is an edgeview of the parts shown in Figs. 1 and 2, including an edge view of a portion of the door;

Fig. 4 is a detail view of the door-latch.

Similar reference numerals in all of the figure of the drawing designate like parts.

This device is constructed to be mountedon the top of the elevator-car and in the drawings at 5 is shown one of the channelbeams of the cross-head of the elevator. Rigidly secured in any suitable manner to said beam 5 are the supporting-brackets 6,

which are connected together by the rails 7 and a rack-bar 8. Mountedto slide on said electric motor 11, a brake 12, a reducinggearing 13, a panel-board 14; for control-- ling the motor, adoor-arm 15 for operat-- ing the doors or gates, at drive-gear 16 which one arm of which is secured to plate 29 by a link 36.

travels on the rack-bar 8 to move the platform back and forth, and suitable shaftsupports, switches and springs forming a part of the operating mechanism.

The power is transmitted from the motor through a shaft 17 to the reducing-gears 18 and from these gears to the drive-gear 16 by a shaft 19, so that, as the motor is actuated, the gears are driven and the drivegear 16 is caused to travel along the rack 8 and carry the platform 9 therewith. The motor has a remote control; that is, it is controlled by a push-button 20 mounted in the cab of the elevator at some point convenient to the operator who has charge of, the car. Another push-button 21 is provided for, reversing the motor to close the gates or doors, and a third button 22 is used to control the brake 12 which will allow the operator to stop the gate or door at any point in its travel.

Door-arm 15 is pivoted atone end at 23 to the top of the platform, preferably near one edge thereof, and is formed witha short angular bend at 24 to extend the free end beyond the edge of the platform, is then extended forwardly a suflicient distance to reach the vertical plane of the gate, and is provided with a depending portion 25 which extends downwardly to near the latch 26 of the gate. On the end of this depending portion 25 is a two-faced cam 27 which is adapted to travel between the guide-

plates

28 and 29 mounted upon a suitable base 30 which is fixed to the gate or door preferably above the latch 26, said cam 27 serving to insure the proper positionof the arm 15 in its up-and-down travel with the car.

Guide-plate 28 is rigidly fixed to the base 30 and guide-plate 29 is mounted to move sidewise upon the bolts 31, this movement being limited by the slots 32. A spring 33 is provided to retain plate 29 in its normal position with its vertical edges parallel with a corresponding edge of plate 28 and slightly spaced therefrom to form a channel between. the two plates, through which the cam 27 travels. Adjacent the bottom edge of the base 30 is pivoted an angle-lever 34,

slot-and-pin connection 35, its other arm being connected to latch 26 through the With the construction thus far described, when the car is stopped at one of the landshown in Figs. 1 and 2), thereby causing the arm to engage plate 29 and push it sidewise to the limit oi the slots 32. This movement of the plate operates angle-lever 3 1 on its pivot with the result that the link 36 is.

pulled upwardly, which in turn lifts the latch 26 and thus unlatc-hes the doorsfastening. The platform continues to move to the right and the gate is pushed to open pos1- tion by the arm 15 after the latch is unfastened. hen it is desired to close the gate, the operator pushes the reverse button 21 when the motor starts in the reverse direction, causing cam 27 to engage plate 28 which is rigidly atlixed to the gate; thus the gate is forced to closed position and the latch automatically catches in its keepers.

To prevent slamming of the door, a butfer mechanism comprising a dash-pot and a spring device is used. The dasl1pot cylinder 37 is secured adjacent the end of one of the brackets 6, and its piston-rod 38 has an arm 39 secured thereto which is extended upwardly and laterally over the dash-pot and is provided with an upwardly-turned free end which forms a contacting 10 which lies in the path of and against which the forwardly-extending portion or the door-arm is adapted to strike. The dash-pot is also provided with a spring 37 for returning it to normal position. The spring device comprises a pair of

springs

41 and 41 mounted on a pull-rod 12 and positioned on opposite sides of a lug 43 fixed to the top of the platform 9. Said springs 11 are mounted be tween said lug 43 and nut-collars 14. One

endfof said rod is secured to the door-arm 15' as shown at 15. Thus when the door is being operated to closed position and before it reaches its limit of movement, arm 15 engages contact-lug 40 and operates the piston in the dash-pot. This part of the operation cushions the closing movement, and the resistance offered by the dash-pot forces arm 15 slightly to the right (from the position shown in Fig. 1), thereby pushing the rod 42 to the right and compressing spring 41. This resistance to the movement or the doors stops 1t and its operating mechanism slightly short of complete closed position then after the motor is shut ofi,

s ring i1 expands and completes the closing operation without a jar or slam. When the resistance of the dash-potoper'ates to compress "spring 11', the movement to the right of arm 15 also operates a shift-rod &6 which in turn operates a pivoted switch-lever 47 provided with a switch-pla te 48 at one end and which normally closes the gapfbetween the contacts 49 forming a part of the motor operating circuit. Thus the motor circuit of the doormechanism is automatically broken to stop the motor short oi a complete closing of the door or gate.

The principle involved is that of air Working against springs. The two springs T1 and 4.1 are mounted on the platform at a central point between them, so that, no mat ter in which direction the arm 15 tends to move on its pivot 23, it will be counteracted by a spring of suflicient tension to withstand a force sufiicient to move the door. In the regular travel of the platform, the springs stand the pull of the doors, but when the dash-pot is reached the resistance compresses one of the springs and also causes the arm to operate the motor-switch and cut out the motor.

WVhile the door is closing, should it become blocked by a person or mechandise in its path, the effect .upon arm 15 would be the same as caused by the dash-pot; that is, the resistance of the obstacle against the movement of the platform would cause the arm 15 to operate the motor-cut-outswitch and stop the motor and also the door at the point of blockade.

. Another cut-out switch 50 is provided. in the elevator circuit which is operated to cutout elevator lifting power when the door starts to open. This switch is operated by anextension 51 from arm 39 of the dash-pot mechanism. Said switch 50 is secured to the frame of the elevator.

The panel-board 14 is of standard electrical equipment, and in this instance is used as. a control for the motor in connection from the motor. This board and the connecting circuits are shown only diagrammatically, as their specific construction forms no part ofthis invention. The brake 12 is solenoid-operatedand is preferably connected with the motor in a way to allow thebrake to release only when the motor is operating.

The whole mechanism is carried on the brackets 6. attached to the-cross-head beams of the car, and is sufliciently light in weight to not affect the-operation of the car in any manner. x

The nature and; scope of the invention having been thus indicated and its preferred embodiment having been specifically described, what is claimed as new is:

1. An elevator-door operator comprising a platform movable on the to of the elevatorcar, a power mechanism or moving said platform back and forth mounted on the platform, a' 'door arm' pivoted on the plat. form and constructed to engage the door to be operated, means for controlling said power mechanism from within the car, a

' platform movable on the top of the elevatorcar, a power mechanism for moving said platform back and forth mounted on the platform, a door-arm pivoted on theplatform and constructed to engage the door to be operated, means for controlling said power mechanism from within the car, a buffer mechanism for stopping the movement of the door, and means operated by the lateral movement of the door-arm on its pivot for stopping the power mechanism.

8. An elevator-door operator comprising a platform movable on the top of the ele vator-car, a power mechanism for moving said platform back and forth mounted on the platform, a door-arm pivoted on the platform and constructed to engage the door to be operated, means for controlling said power mechanism from within the car, a buffer mechanism for stopping the movement of the door, and means operated by the lateral movement of the door-arm on its pivot for stopping the power mechanism, said lateral movement being caused by the resistance offered by the buffer mechanism.

4. An elevator-door operator comprising a platform movable on the top of the elevator car, a power mechanism for moving said platform back and forth mounted on the platform, a doorearm pivoted on the platform and constructed to engage the door to be operated, means for controlling said power mechanism from within the car, a buffer mechanism for stopping the movement of the door, including a dash-pot having a projection carried by its piston-stem which lies in the path of the door-arm, and means operated by the door-arm for stopping the power mechanism.

5. An elevator-door operator comprising a platform movable on the top of the elevator, a power mechanism for moving said platform back and forth mounted on the platform, a door-arm pivoted on the platform and constructed to engage the door to be operated, means for controlling said power mechanism from within the car, a buffer mechanism for stopping the movement of the door,.including a dash-pot having a projection carried by its piston-stem which lies in the path of the door-arm, means operated by the door-arm for stopping the power mechanism, and a pair of springs mounted on a rod connected to the door-arm and separated by an abutment fixed to the platform.

6. An elevator-door operator comprising aplatform movable on the top of the elevator-car, a power mechanism for moving said platform back and forth mounted on the platform, a door-arm pivoted on the platform and constructed to engage the door to be operated, means for controlling said power mechanism from within the car, means for operating the door-arm'in one direction on its pivot to cut-out the power mechanism and stop the door short of its full movement, and means for operating the door-arm in another direction to finish the full movement.

7. An elevator-door operator comprising a platform movable on the top of the car, a power means for moving the platform car ried by the car, a door-arm secured to said platform and provided with a cam-projection on its free end, and a combined door and door-latch operating mechanism secured to the door and also constructed to form a guide-way for the cam on the door as the elevator-car travels up and down.

8. An elevator-door operator comprising a platform movable on the top of the car, a power means for moving the platform carried by the car, a door-arm secured to said platform and provided with a camprojection on its free end, and a combined door and door-latch operating mechanism secured to the door and embodying a pair of plates arranged to be alternately engaged by said cam-projection to open and close the door, one of said plates being mounted movable with respect to the other plate and provided with a connection extending to the door-latch, whereby the primary engagement with the movable plate will unlatch the door previous to its opening movement.

9. In combination with an elevator-car, a support movably mounted thereon, a motor mounted on said support and mechanism for moving the support when the motoris operated, an arm for moving the elevator-door movably mounted on said support, and means actuated by the movement of this arm for stopping the motor when the elevator-door reaches the limit of its travel.

In testimony whereof I hereunto afiix my signature.

CLAUD L. FULGHUM.