US1959042A

US1959042A - Gate opening and closing device

Info

Publication number: US1959042A
Application number: US289036A
Authority: US
Inventors: Staley Marccllus
Original assignee: Otis Elevator Co
Current assignee: Otis Elevator Co
Priority date: 1928-06-28
Filing date: 1928-06-28
Publication date: 1934-05-15
Anticipated expiration: 1951-05-15

Description

M. STALEY GATE OPENING AND CLOSING DEVICE May)! 5, 1934;'

Filed June 28, 1928 5 Sheets-Sheet 1 INVENTOR ATTORNEY May 15, 1934. ,M. STALEY GATE OPENING AND CLOSING DEVICE- 5 Sheets-Sheet 3 7 Filed June 28, 1928 BY W 7 ATTORNEY May 15, 1934. I STALEY 1,959,042

GATE OPEXING AND CLOSING DEVICE Filed June 28, 1928 5 Sheets-Sheet 4 INVENTOR A TTORNEY May 15, 1934. s E 1,959,042

GATE OPENING AND CLOSING DEVICE Filed June 28, 1928 Shaves-Sheet 5 4O p IjgJl. CAR SWITCH 5oeq 500 42 I D IREICT swrrn GATE MAG SWITCH V as 56 GATE 1 WITC 111 89 syv lfi: 90110 R I /NVENTOR A TTOANE y Patented May 1-5, 1934 PATENT- OFFICE GATE OPENING AND CLOSING DEVICE I Marcellus Staley, Brooklyn, N. Y., assignor, by

mesne assignments, to Otis Elevator Company, New York, N. Y. a corporation of New Jersey Application June 28 1928, Serial No. 289,036

30 Claims. (Cl. 187-52) My invention relates to means for opening and closing gates for elevators and more particularly to means for opening and closing sliding gates or doors on the elevator car, or at the elevator landing, comprising a reversible electric motor and friction clutch, driven by said motor, with an arm attached to one member of the clutch, a sliding gate being attached to the other'end 0 said arm.

One of the objects of my invention is to provide a motor and friction clutch on the car which will operate the gate and means whereby the friction clutch members may be disengaged so that the gate may be operated by hand, or stopped when the gate meets with an obstacle.

Another object of the invention is to provide a gate opening and closing mechanism which is of simple construction and easy to operate and which can be easily attached to elevator gates now in use.

Another object of my invention is to provide a plurality of electrical circuits for starting the gate motor so as to close the gate before the elevator motor starts to operate the car and for stopping the elevator motor and reversing the gate motor so as to open the gate after the car reaches and stops at an elevator landing.

Another object of the invention is to provide mechanical means for locking and unlocking the door at the elevator landing, the said means being controlled by the motor which opens and closes the elevator gate.

Another object of the invention is to.provide means operated by the door lock, controlled by the gate motor, whereby the.elevator motor cannot be started while the door at the elevator landing is unlocked.

With the above and other objects in view, my invention consists in the parts, improvements and combinations more fully pointed out hereinafter.

Turning now to the drawings, which illustrate one embodiment of the invention:

Figure 1 is a front elevation of the motor and arm, in position for controlling the elevator gate, and the door at the elevator landing.

Figure 2 is a cross-sectional view, thrbugh the hollow, transverse shaft and friction clutch.

Figure 3 is a section on line 3-3 of Figure 2.

Figure 4 is a detail view of the ring, carried by one of the friction clutch members.

Figure 5 is a side elevation, partly in section, showing the gate motor and the parts operated thereby for opening and closing the elevator gate and the door at the elevator landing.

Figure 6 is a detail view of the friction clutch and the adjusting spring, and

Figure 7 is a top plan view showing the means for unlocking and opening the door at the elevator landing.

Eigure 8 is a detail view of the lock for the door at the elevator landing, taken on line 8-8 of Figure 7.

Figure 9 is a side elevation of the door lock, showing the means for making and breaking the circuit to the elevator motor.

Figure 10 is a horizontal cross-section of the lock, taken on line 10-10 of Figure 9.

Figure 11 is a diagram of the electrical circuits for the elevator motor and for the gate motor.

In the drawings, the elevator car 1, is provided with a gate 2, supported by rollers 3, running in track 4, at the top of the car. An electric motor 5, which is a torque motor, which, when stopped with the current on, will not burn out its armature and which is capable of reversing, is provided and may be either a direct current or an, alternating current motor. Motor 5, is mounted'in a bracket 6, on the top 7 of the car. Although shown for operating the gate of the car, it may be used for operating the gate at the landing.

The motor 5, by means of a coupling 8, drives a shaft 9, on which is mounted a worm 10, which, 35 in turn, engages a worm wheel 11. The worm wheel 11, is secured to a hollow, transverse shaft 12, by set screw 13. The hollow shaft 12, as shown, has secured thereto, one member 14 of a friction clutch, by set screw 15. This friction member is preferably a disk having an inclined periphery 16, to which is secured suitable friction material 17, by means of rivets 18. Another friction member. 19 of the clutch, is a concavedisk, with inclined periphery 20, fitting over the friction material 17 of the disk 14. This member 19, is free to rotate on the hub 21 of the friction member 14, and the two friction members are interengaging, being pressed together by a shaft 22, and spring 23. Shaft 22, passes through the hollow shaft 12, and carries on its outer end, a plate 24, permitting the free rotation of the friction member 19, on the hub 21. 7

An arm 25, is secured to friction member 19, by rivets 26. The sliding gate is attached to the other end of arm 25, by means of an elongated slot 27 in the arm, engaging a pin 28, on the gate.

Means are provided for separating the members of the friction clutch, so that the gate may no be operated by hand, or so that it may be stopped when the gate meets an obstacle.

In the embodiment of the invention illustrated, I provide a ring 29, having radial grooves 30, which is attached to the friction member 14 of the elutch, as by pins a, passing through holes 31, in the ring. The pins 32, secured to the other friction member 19, are pressed by spring 23, into engagement with the grooves 30 of the ring 29. When the gate meets an obstacle, arm 25, and disk 19, are held while the motor continues to turn disk 14, raising the pins 32, out of the grooves 30, so that the pins run on the track of the ring 29. This disengages the friction clutch members, separating the inclined periphery 20 of disk 19, from the frictionmaterial 17, of disk 14. The gate arm 25, it will be seen is directlyg connected to the disk 19. When it is desired to operate the gate by hand, this may be readily done by placing the hand on the door and sliding it back and forth, while the motor is running or not, for this will raise the pins out of the grooves of the ring, so that they will run on the track of the ring.

. This-will separate the inclined periphery 20 of disk .19 from the friction material 17 of the disk 14.

Means are provided for adjusting the members of the friction clutch with relation to each other, so as to compensate for wear of the pins in the grooves of the ring.

- As shown, one end of spring 23, is secured to a plate 33, carried by the hollow shaft 12, on which shaft one member 14 of the clutch is carried,

andthe other end of the-spring engages a plate 34, carried by shaft 22. On the hub 21, the other member 19 of the friction clutch is mounted.

Look nut 35, adjusting nut 38 and washer 37, are

provided to hold the spring at the desired tension and the clutch members in position. It will be seenthatby loosening and then screwing up the adjusting nut36, so as to move the plate 34,

. the tension onspring 23. will be increased so as landing.

to move shaft 22. This movement of shaft 22, will move the member 19 of the clutch toward the other clutch member 14. This will compensate for any wear of the clutch lining.

' It will be seen that the shafts and spring are arranged'facin'g inwardly so as to avoid them striking parts on the landing.

Means are provided, operated by the motor which opens and closes the elevator gate," for controlling the lock for the door at the elevator As shown, see Figures 1 and 5, friction clutch member 19, is provided with an extending slotted arm. 300. Bolt 301, to which is secured one end of a chain 302, passes through the slot in the arm 300, and is held in place therein by nut 303. The bolt and chain may be adjusted in the slot in various positions. 2

Chain 302, passes over pulley 304, which is mounted by bracket 305 on the car top. From the pulley the chain passes and is secured to shoe 206. Shoe 306, by means of arms 307 and pivot bolts 308, is pivotally secured to the side of the elevator car.

Mounted on a; plate 309, on the elevator shaft 310, at each elevator landing is a rod 311, pro- Jecting inwardly in the shaft. At its inner pro-- iecting end rod 311 carries a lever 312, having roller 313, which is adapted to ride on the face of shoe 306. Mounted on the other end of rod 311, at the shaft wall, is a'latch 314. The door 315, for the elevator iandins, carries an extend tween the two

angle irons

318, 319.

ing arm 316, provided with teeth 317, which are engaged by the latch 314.

It will thus beseen that when the car reaches a landing and the gate motor is started to open the gate, the friction clutch member will turn, carrying the extending arm 300 from the dotted line position'to the full line position shown in Figure 1, so that chain 302, passing over pulley 304, allows the shoe 306, to rock on its pivots,

away from the side of the car. This forces lever 306 is withdrawn from engagement with roller 313 on lever 312 so as to enable latch 314 of the' door lock to lock door 315 in closed position.

Means are provided whereby the opening of the gate on the elevator car, will open the door at the elevator landing. after the door lock has been released. J

These means comprise a pair of

angle irons

318, 319, carried by the door for the elevator landing, and a T-bar 320, carried by the elevator gate 2. Bar 320 is mounted so as to extend be- When the gate motor 5, is started and arm 25 is moved to open the gate, and the door look at the elevator landing has the opening 0 the elevator gate will cause the T- bar 320 to engage angle iron 319, and so open een unlocked as above described,

the door for the elevator landing. When the gate is closed, the T-bar 320 will engage the other angle iron 318, and so close the door at the elevator landing as the elevator gate is closed.

Means comprising a plurality of electrical circuits, are providedfor starting, stopping and aeversing the elevator motor so as to control the the movement of the car, and for starting, stops ping and reversing the gate motor, so as to control the operation of the gate and the door at the elevator landing. The various circuits are so opened and closed that the gate motor will be started and completely close the gate and door before the elevator motor is started and the car moved. They also operate to stop the elevator motor and the car, when the car reaches a landing, before the gate motor is started in the reverse direction to open the gate and the door at the l nding.

These circuits are schematically illustrated in Figure 11. The circuits are shown as used with a three phase motor for the elevator and a three phase motor for the gate, although one circuit may be omitted and two phase motors or direct current motors, used. As shown inFigure 11, the car is shown stopped at a landing and the gate and door are open, both motors being at rest.

If it is desired to operate the car, for example upward, the movement of the car switch will close and open a plurality of circuits, which will first energize one side of the elevator motor, start the gate motor and close the gate and the door at the elevator landing, stop the gate motor when the gate and door are completely closed, and then energize the other side of the elevator motor to move the car. The circuits for starting and stopping the gate motor will first be described.

Gar switch 40, is shown pivoted to car switch terminal 41, which is connected to wire 55, wire 55 being connected, through terminal 48, with main 46. When the car switch 40, is moved to the left of Figure 11, up terminal 42 is made. Current from a source (not shown) will pass through main 44, terminal 49,

wires

50, 51, 52, through coil 53, through wire 54, terminal 42, car switch 40, car switch terminal 41, wire 55, terminal'46' to main 46. This circuit, it will be seen, energizes, .c oil 53. Coil 53, when; energized, will operate up direction'switch 56, on its pivot 57.

Direction switch 56, when operated, as above, closes another circuit which energizes a coil for operating the gate magnet switch 67, controlling the current to the gate motor. As shown, the operation oi switch 56, closes contacts60, 61. Current may now pass from .main 44"through ter-.

minal 49,

wires

50 and 62, through coil 63, through wire 64, contacts 61, 0,'

wires

65, 66 and 55, terminal 42, car switch 40. car switch terminal 41 wire 55, terminal 48 to main 46. This will energize coil 63.-

Coil 63, when energized, will operate 'gate'magnet switch 67, on its pivot 68, so as to make

contacts

69, 70, and 71, 72, thus closing the circuits I leading to the gate motor 5. Currentwill now-- pass from main 44, through terminal 49, wires 73, 74,

contacts

69, 70, wire 75, contacts 76, 77 on main line switch 102,

wires

78, 79, tothe gate motor A three phase motor being illustrated, current also passes from main 45,through terminal 47, wires-83, 84,- contacts 71, 72, wire 85.

contacts

86, 87, also on main line switch 102, wires" 88 89, to the gate motor 5, at 90. The current leaves the motor at 81, and returns through wire 82, terminal 48 and main 46. The gate motor 5, will now be started and arm 25,. moved so as to close the gate. As soon as the gate starts to close it allows switch 106 to rock on its pivot 108 and be returned by spring 1080, thus moving

contacts

109 and 110 into contact with

contacts

112, 111, which is the position of 'the switch for opening the gate when the elevator'car reaches a landing.

When the door and gate reach closed position, shoe 306 is withdrawn, as previously described, and latch 314 moves into position to lock door 315 in closed position. v

Means are provided, controlled by the gate, for stopping the gate motor, and permitting the elevator motor to start so as to move the car upward.

As shown, these means comprise a gate switch 92, provided with a roller 93 and a pair of

contacts

94, 95. When the gate and door have closed, gate shoe 91, has moved to the left of Figvure 11 and roller 93, riding upon the shoe, brings

contacts

94, 95, into contact with a pair of line I contacts, 96, 97, suitably provided. This closes a circuit, now to be described, (

contacts

517, 514 in such circuit having engaged as a result of the closure of door 315, as hereinafter described) ,for

energizing the line switch coil 99. The current in such circuit passes from main 44, through terminal 49,

wires

50 and 101, contacts 97, 95, contacts 9 4. 96', wire 518,

contacts

517, 514, wire 516,

wire 100,coil 99,

wires

93, 64, contacts 61, 60,

wires

65, 66, 54, terminal 42, car switch 40, car.

switch terminal 41, wire 55, terminal 46 to main 46.

The energizing of coil 99, as above described, will operate line switch 102, on its pivot 103.- This operation of the line switch, it will be seen, opens

contacts

76, 77, and 86, 87, thus breaking the circuit leading to the gate motor and deenergizing this .r'notor. v

The operation of the line switch also completes the circuit to the elevator motor, so that the ole; vator motor, after the gate and door have been closed and the gate motor stopped, can startand move the car upward. The elevator motor 'circuit will now be described.

The closing or contacts 580, 59a was preparatory to completing a connection from main 45 to the elevator motor.. Theoperation of line switch 102 causes the closing of its

contacts

104, 105 and 104a, 105a. The. closing of

contacts

104, 105 completes the connection from main 45 to the elevator motor 500, through'wire 503, contacts 59a, 58a, wire 504,

contacts

105, 104 and Wire 505.

The-closing of contacts 104a, 105a connects main I, 46 to the elevator-motor through wire 507, contacts 105a, 104a and wire 506. The elevator mo-' tor 500 will now start and move the elevator car upward. I -When the car reaches a landing, it is desired to stop the car and open the elevator gate-and door at the landing. Car switch 40, is brought. I to its neutral position (as shown in Figure 11), so as to open the various above described circuits. This de-energizes coils 53, 63 and 99. When coils 53 and 99 are de-energized, contacts 58, 59 and 58a, 59a and

contacts

104, and 1040, 105a, 1; are broken and the current supply to the'elevator motoris shut 01! and the elevator motor is stopped.

67 to operate so as to open

contacts

71, 72 and 69,-

70, and make contacts 113,; 114 and 115, 116.

The gate being in its closed position when the car reaches a landing, gate shoe 91 is away from open limit switch 106. Current will now pass through main 44, terminal 49,

wires

73, 74, 117, through

contacts

113, 114, wire 118,

contacts

109, 112, wire 136 to the gate motor 5'at 90. .Current also passes from main 45, terminal 47, wire 83, 84,119, through

contacts

115, 116, wire 120, contacts 110,115 111, wire 135, to the gate motor 5 at 80. The current returns from the motor at 81-, as before, through wire 82, terminal 48 and main 46. Current will thus be supplied to the gate motor so as to turn it in the reverse direction and open the gate 2 of the elevator car.

The first movement of gate motor 2 in the opening direction moves arm 300 of the friction clutch from the dotted line position shown in Figure 1 to a position in which shoe 306 engages roller 313 on door lock lever 312 and effects the unlocking of door 315. By the time gate motor 2 moves the gate from closed position suflicient to cause the engagement of T-bar 320 with angle iron 319, the unlocking of door 315 is completed, so that further opening movement of gate 2 alsocauses the opening of door 315.

when the gatehas fully opened, roller 107 of limit switch 106, rides upon shoe 91, thus

open ing contacts

109, 112 and 110, 111 and breaking.

the circuit leading to the gate motor. This stops .the gate motor and stops the opening of the gate.

Means, comprising an electrical circuit, operated by the door lock and controlled by the gate motor, are provided for breaking the circuit leading to the elevator motor, when the gate and elevator door are open, so that the car may not be started, and for closing the circuit leading to the elevator motor, after the gate has been compiete- 1y closed and the door at the elevator landing has also been completely closed.

As shown, see Figures 9 and 11, the plate 309 on the elevator shaft wail, carries a lever 510, pivot.- ed at 511. Secured to lever 510, is a block 512. which carries an insulating strip 513. Contact 15 514, by means of screw 515 is secured to the insulating strip" 513. Connected to contact 514 (see Figure 11) is wire 516, which is connected to wire 100 of the line switch circuit, previously described. Mounted in plate 399, is another contact 517, to which is secured wire 518, connected at its other end to contact 96 of the gate switch. A spring 519, connected to block 512. and to the plate 309, presses the block against the arm 316 of the door lock and keeps

contacts

514 and 517 open until the arm 316 on the elevator shaft closes them by rocking lever 510 about its pivot 511;

i It will thus be seen that when the door 315 is opened and the arm 316, moves to the right, spring 519 is released and ,causes the block 512 and lever 510 to rock about pivot 511. This allows contact 514 to move away from contact 517, and break the circuit leading to the elevator motor through the line switch. The circuit will remain broken while the door at the elevator landing is open. When the door has been completely closed, lever .510 will be rocked back on its pivot, com-,

, pressing spring 519, and bringing contact 514 into contact with contact 517, thus completing the circuit to theelevator motor, only after the elevator gate and the door at the landing have been completely closed, and allowing the car to a travel upward.

When the car is to be operated downward, the switch 40 is thrown to the right of Figure 11, making contact with terminal 43. Current from main 44, will pass through terminal 49,

wire

50 and 51, wire 121, through coil 122, wire 123, terminal 43, car switch 40, car switch terminal 41, Wire 55, terminal 48 and main 46. This circuit will energize coil 122, so as to operate down direction switch 124 on its pivot 125. This switch will close

contacts

137, 138 and 137a, 138a. It will also close contacts 126, 127, so as to close the circuits above described for sending the car upward.

It is to be observed that when the gate is operated by hand-as may be done due to the releasable friction clutch as previously described-- shoe 306 is also operated. Thus, the manual opening of gate 2 by one within the car causes the unlocking of door 315 and the opening thereof similarly as though gate 2 were opened by motor 5.

It is to be understood that throughout the'description the term gate is used to mean the elevator gate and the term door to mean the landing door and that the device can be used to operate either or both constructions.

Having thus described the invention, its operation will be clear and it is understood that changes may be made, as for instance the elevator may be operated by means of the car switch shown or by push buttons, the number of grooves in ring 29 may be increased; or changes may be made in the kind of circuits and motors used, without departing from the principle of the invention.

What I claim is:

1. An electric gate opening and closing device for elevators comprising in combination, a reversible electric motor mounted on the car top, means for reversing the motor, a friction clutch, one member of said friction clutch being driven by said motor, an arm secured to the other member of said friction clutch and a gate attached to said arm.

2. An electric gate opening and closing device for elevators comprising in combination, a re-- versible electric motor mounted on the car top, means for reversing the motor, a clutch, one

member of said clutch being driven by said motor, an arm. secured to the other member of said clutch, a sliding gate and a sliding connection between the arm and the gate.

3. An electric gate opening and closing device for elevators comprising in combination, a reversible electric motor mounted on the car top, means for reversing the motor, a shaft for said motor, a worm mounted on the motor shaft, a hollow, transverse shaft, a worm wheel on said transverse shaft driven by said worm, a friction clutch, one member of said clutch being secured to said transverse shaft, a shaft passing through said hollow shaft and carrying a second friction clutch member, cooperating with said first member, a spring forcing said clutch members together, an arm secured to said second clutch member and a gate attached to said arm.

4. An electric gate opening and closing device for elevators comprising in combination, a reversible electric motor mounted on the car top, means for reversing the motor, a shaft for said motor, a worm mounted on the motor shaft, a hollow, transverse shaft, a worm wheel on said transverse shaft, driven by said worm, a friction clutch, one member of said clutch being secured to said transverse shaft, a shaft passing through said hollow shaft and carrying a second member of the friction clutch, cooperating with said first member, a spring forcing said friction clutch members together, means for adjusting said spring, an arm secured to said second friction clutchlmember, and a gate attached to said arm.

5. An electric gate opening and closing device for elevators comprising in combination, a reversible electric motor, mounted on the car top, a friction clutch, one member of said clutch being driven by said motor, an arm secured to the other member of said clutch, a gate attached to said arm, and means for disengaging the friction clutch members, so that the gate may be operated by hand or stopped when it meets an obstacle.

6. An electric gate opening and closing device for elevators comprising in combination, a reversible electric motor mounted on the car top, a friction clutch, one member of said clutch being driven by said motor, an arm secured to the other member of said clutch, a gate attached to said arm, a grooved ring'secured to one of said clutch members, and a pin engaging the groove, and secured to the other clutch member.

7. An electric gate opening and closing device for elevators comprising in combination, a reversible electric motor mounted on the car top, a friction clutch disk provided with an inclined periphery, friction material secured to said periphery, a concave friction disk, with inclined periphery, fitting over said friction material, one of said friction disks being driven by said motor, an arm secured to the other friction disk, and a sliding gate secured to said arm.

8. An electric gate opening and closing device for elevators comprising in combination with an elevator car, an elevator gate, a reversible electric motoor on the car top, mechanical connections between the gate and the motor, including a gate arm and a friction clutch comprising a pair of interengaging members, means for separating one clutch member from the other, said gate arm being attached to the gate and directly connected to said first-named clutch member, a shaft door. a locktherefor, and means controlled by the opening and closing of the gate for unlocking and looking the shaft door lock.

, 9. An electric gate opening andclosing device for elevators comprising in combination, areve'rsible electric motor mounted on the our top, a friction clutch, one member of said clutch 'being driven by said motor, an arm secured to the other member of said friction clutch, a gate attached to said arm, an'elevator shaft door, a lock for the shaft door, and means operated by said motor for unlocking and locking the shaft door lock, when the gate is openedand closed.

10. An electric gate opening and closing device for elevators, comprising in combination, a reversible electric motormounted on the car top, an elevator gate,- a friction clutch driven by I said motor, means connecting said friction clutch to the elevator gate whereby the gate may be opened and closed when themotor is operated, an'elevator shaft door, alock for the shaft door, a chain connected at one end to said clutch and operated by said motor, and a shoe carried by the elevator and secured to the other end of said chain, said shoe being adapted to engage and unlock the lock for the shaft door. i

11. An electric gate opening and closing device for elevators comprising in combination, a reversible electric motor mounted on the car top, an elevator gate, a friction clutch driven by said motor, means connecting said friction clutch to the elevatorgate, whereby the gate may be opened and closed when the motor is operated, an elevator shaft door,'a lock for the shaft door having a lever, a chain connected at one end to saidfriction clutch and operated by the motor, a shoe carried by the elevator and secured to the' other end of said chain, said shoe adapted to engage the lever so as to unlock the shaft door lock, and means for adjusting the chain. 7

1 2. An electric gate opening and closing device for elevators comprising in combination, a reversible electric motor mounted on the car top, an elevator gate, a friction clutch driven by said motor, means connecting said friction clutch to the elevator gate, an elevator shaft door, a lock for the shaft door, means connected to said friction clutch and operated by the motor for unlocking and locking said lock, and means carried by the gate for engaging the shaft door, whereby the opening of the gate will open the elevator shaft door,

13. An electric gate opening and closing device for elevators comprising in combination, a reversible electric motor mounted on the car top, an elevator gate, a friction clutch driven by said motor, means connecting said friction clutch to the elevator gate, an elevator shaft door, a lock for the shaft door, means connected to said friction clutch and operated by the motor for unlocking-and locking said look, a pair of extending bars "carried by the shaft door, and a bar carried by the gate, said bar projecting between the bars on the shaft door, so as to open and close the shaft door when the elevator gate is opened andclosed.

14. In an electric gate opening and closing de-- vice for elevators having a reversible rotary electric motor for opening and closing the gate driving it in both directions, a gate and mechanical connections including a friction clutch and a gate arm between the gate and the motor, said clutch comprising a pair of interengaging members, means for separating one clutchv member from the other, said gate arm being attached to the gate and directly connected to said first-named clutch member, a plurality of electrical circuits, and means for opening and closing said circuits so as to operate the rotary gate motor and cause trio motor for operating the the gate motor-to close the gate before the elevator 15. m an electricEate opening" and closing device r slevators havmg an [elevator carj and a gate" which opens and "closes the; car opening having a reversible 1 rotary' electric motor for operating thegatef' driving it "in both directions,

a gate an rriechanicalconnections "including a friction clutch'j'anda gate-arm between-the gate and themotor, 's'aid clutch comprisingapan's:-

interengaging members, means fOr separating one clutch member f'rom*the other,'said gate arin being attached to thegne anq doecuy'eanne tec to said flrst-named clutch memberg aplurality of electrical circuits, one-ofsaid-circuits' being adapted to operate thegate motor-in onefjdirection to cause the gate motor to-closefthegate before the elevator is started,- another'-of s'aid circuits being adapted tooperate 'the gate-motor in the reverse direction to open" the gate after the elevator is stopped, and means for-opening and closing'said circuits. a h

-16.- In an electric gate opening and closing device for elevators having an elevator car and a gate for opening and closing the car opening 0 having a reversible rotary electric motor for op-i crating the elevator and a reversible rotary elecgate, a gate and mechanical connections including a ,friction clutch and a gate arm'between the'gate and the 0 gate motor, said clutch comprising a pair of interengaging members, means for separating one clutch member from the other, said gate arm being attached to the gate and directly connected to said first-named clutch member, a plurality and for reversing the gate motor the gate, a gate. switch carried by the elevator and means for closing the gate switch after the gate has closed so as to close another circuit to the elevator motor. v

' 17. In an electric gate opening and closing device for elevators having anfelevator car and of electrical circuits, for operating the gate motor so as to cause the gate motor to close the gate so as to open a gate which opens and closes the car opening having a reversible electric motor for operating the gate, a gate and mechanical connections including a friction clutch and a gate arm between the gate and the motor, said clutch comprising a pair of interengaging members, means for separating one clutch member from the other, said gate arm being attached to the gate and directly connected to said first-named clutch member, a plurality of electrical circuits for operating the gate motor so as to close the gate and for reversing the gate motor so as to open the gate, a limit switch carried by the elevator, and means for actuating the limit switch to open the circuitto the gate motor to stop thegate motor, after the gate is opened.

1-8. In an electric gate opening and closing device for elevators having in combination with the elevator and its gate, a reversible electric motor for operating the gate, another reversible electric motor for operating the elevator, a friction clutch driven by the gate motor, mechanical con-" nections between the gate and the gate motor for opening and closing the gate, an elevator shaft door, a lock for the elevator shaft door, means connected to said friction clutch for un- 146 locking and locking said shaft door look, a pluopening the elevator motor circuit when the shaft considerably shorter radius from the pivot there'- 0! than is the operative connection between said closure operating lever and said car closure.

26. In an elevator installation; an elevator car; a closure for the hatchway opening at a floor served by said car; a lock for said hatchway clossure havingan operating member mojvably mounted on said hatchway; an unlocking cam'mounted on said car for engaging and moving said operating member to effect unlocking or said hatchway closure when said car is opposite. the same, said unlocking cam being movably mounted on said case that it may be moved from engagement with said operating member to effect lockving 01' said hatchway closure; aclosure on said car for the ;car opening; mechanism on said car for power opening and power closing said car closure, said mechanism comprising motive means and mechanical connection between said motive means and said car closure, said mechanism pro- 1 viding for manual opening oi. said car closure f means.

27. In an elevator installation; an elevator car; a closure for the hatchway opening at a floor served by said car; locking means'jor locking said hatchway closure in closed position, said means having a member movably mounted on said hatchway adjacent said hatchway closure so that said member normally assumes a position lockingsaid hatchway closure in closed position, said member, upon movement thereof irom such locking position, unlocking said hatchway closure; 9.

moving said member adjacent-said hatchwa'y' closure to efiect unlocking thereof when said car is opposite the same, said member-on said carf necting mechanism'betwee'n the output of said power drive and said car closure normally'eii'ective to transmit motion through itself from either of its ends to its other end without lost motion,

, so that normally said power drive actuates saidcar closure to open and close the same without 7 lost motion in said connectingmmechanism, said connecting mechanism being'eitect'ive, under abnormal conditions, such as when manual eflort' in the opening direction is applied to the car closure when it is in closed position, to provide lost motion in itself, thereby enabling said car car through the intermediary of said motion transmitting connecting mechanism to effect lock- 1 ing and unlocking of said hatchway closure when said power drive moves said car closure to and "tr-om closed position, respectively, whereby, when said car closureisopened manually, such action causes said member on said car to eflect unlocking of said hatchway closure similarly as though such manual opening of said car closure were caused by said power drive.

28. In an elevator installation; an elevator car; a. closure for the hatchway opening at a floor served by said car; locking means for locking said 'hatchway closure in closed position, said "means having a member fmovably mounted" on' said said hatchway closure in closed, position, said" member, upon movement thereof from suchlocking position, unlocking said hatchway closure; an unlocking cam mounted on said car for e'ngaging and moving said memberto efliect unlocking oi saidhatchway closure when said caris'opposite the same, said unlocking cam being movably mounted on said car so that it may be moved from engagement with said member to effect locking of said hatchway closure; af'closure on said carrot the'car opening; a closure operating leverpivotally' supported on said car above said car clo sure, with the lower endoi. said leveroperat'ively connected to said car closu'r'eg a. fpow'erdunit I mounted on said car with rotatory 1 'n'eehanical output tor actuating said'c r ensure irom openposition to closed position" fdvice versa; '-irre-- versible speed reducing equipment driven by. said power unit; means connectingythel-low speed output or said speedi reducing equipment and said closure operating lever-normally without relative motion therebetween so that said car closure is actuated by saidpower'unitthrough the intermediary of said speed reducing equipment, said connecting means and said closure operating lever, said-connecting :m eans being eflective, in the eventjmtzabnormal conditions; such as when manualieflbrt-in the opening direc- 115 tion" is appliedto thelcar closure when it is in closed .positiomto provide for relative motion be,-

, tween said closure operating lever and thelow member mounted on said car for engaging and speed output] of said speed-reducing equipment, thereby-enabling said'car closure to be opened manually in spite of the irreversible character 0! saidspeed reducing equipment; and means controlling: said unlocking'cam in accordance with the position 'orjsaid car closure so as to effect locking and unlocking of said-hatchway closure when said car closure is, moved to and from closed position, respectively, and to maintain said [unlocking cam disengaged from said member while said car closure'is in cldsedposition, said'means comprising mechanical connections between said 130 cam and a point on said closure operating lever at a considerably shorter radius from the pivot thereof than is thecperative connection between said closure operating lever and said car closure, whereby said hatchway closure is unlocked upon opening of said car closure irrespective of whether i such opening is eflected manually or bypower. 29. In combination, an elevator. car; a closure on said car; a motor on said car;.voperative connections from said motor to-said car closure for eflecting opening and closing of said car closure I by said motor, said operative-connections including a power transmitting device having a driving member and a driven-member fixed relative to each other. under normal conditions while move his relative to each other in the event said'car closure encounters an' obstruction and for enabling manual operation of said car closure, against the influence of said motor, in the event said motor becomes disabled while a passenger 150 Lies hatchway adjacent said hatchwayclosure so that said member normally assumes a position locking is in said elevator car; a landing closure; a lock for said landing closure; a movable cam carried by said elevator car for operating said landing closure lock and means actuated in accordance with the position of said car closure for operating said car cam to unlock said landing closure when said car closure is moved from closed position, and to lock said landing closure-when said car closure is returned to closed position, so that normally said motor, in actuating said car closure, causes such operation-of said car cam, but that, in the event said motor becomes disabled while a passenger is in said elevator car, said passenger, in manually opening said car closure against the influence of said motor. efiects the unlocking of said landing closure. v

30,. An electric gate opening and closing device mr elevators comprising, in combination with an elevator car; a gate on said car: an electricmotor on the car top; worm gear speed reducing equiption, respectively.

ment connected to said motor: a gate, arm pivotally supported above said gate and connected I at its lower end to said gate; operative connections between said gate arm ahdthe slow speed shaft'of said speed reducing equipment, said connections including a constantly eilfective coupling releasable in the event the force attempted to be transmitted through said coupling exceeds a given value; a shaft door; a shaft door look; a cam movably mounted on the side of said car for actuating said shaft door lock to unlock said shaft door when said cam is extended and said car is opposite said shaft door; and operative connections between said cam and said gate arm controlling the position of said cam so as to effect locking and unlocking of. said shaft door when said car gate is moved to and from closed posi-