US1587007A

US1587007A - Door-operating mechanism for elevators

Info

Publication number: US1587007A
Application number: US506959A
Authority: US
Inventors: Norton Clifford; Neville S Dickinson; John G Gustafson
Original assignee: ELEVATOR SUPPLIES CO Inc
Current assignee: ELEVATOR SUPPLIES CO Inc; ELEVATOR SUPPLIES COMPANY Inc
Priority date: 1921-10-11
Filing date: 1921-10-11
Publication date: 1926-06-01
Anticipated expiration: 1943-06-01

Description

BEST AVAILABLE COPY June 1 1926. C'NORTON ET AL 1,587,.007

DOOR bPERATING MECHANISM FOR ELEVATORS Filed 0013.: 11, 1921 6 Sheets-Sheet 1 -Z TF & 1

//6 W m avwemtoi flatter/n f 7 W I" A ebu- BEST AVAILABLE COP\ C. NORTON ET AL DOOR OPERATING MECHANISM FOR ELEVATORS Filed 001:. 11, 1921 6 Sheets-Sheet 2 -75 74; tam

'/a AZ m7: //5 0 $1 ii g; ml, :5 III! I g BEST AVAILABLE com June 1 1926.

C. NORTON ET AL DOOR OPERATING MECHANISM FOR ELEVATORS Filed Oct. 11,

1921 6 Sheets-Sheet 5 BEST AVAILABLE COPY Jun-e 1926 I c. NORT' ON ET AL 1 9 DOOR OPERATING MECHANISM FOR ELEVATORS Filed Oct. ,11, 1921 6 Sheets-Sheet 4. 7

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.C. NORTON ET AL DOOR OPERATING MECHANISM FOR ELEVATORS Filed 001). 11, 1921 6 Sheets-SheeE-Z G.

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Patented June 1, 1926.

BEST AVAiLABLE COPY VILLE :JEFys aYHh...-

(if an and the direction of the current through the urete 2 ,.t. l e v by r ersing, l es The.e ectrica lc nnee o s forv on ro g.

the starting and stopping of the elevator are clearly shown diagrammatically in Fig 10. In the diagram illustrated in this figure, 16 and 18 ind1cate- ,the,-inai n c reuitlea-ds; 1

As shown in this figure, the circuit through the motor has ,been 5 closed by thecontroller 10 and the positions of the reversing switches 12 and 14: are such that the motor 8 is rotated in a direction to elevate theca-r.--. With-the reversing switches (in this position, a circuit may be traced frem-thejlead ltithrough the wire 19, master interlock switch 2Q,\Wire 21, contact 22, z-reversi-ng switch 12,17-11'6, 2d,; controlleri 10, resistance 26', Wire 28,-.through-the hoisting motor 8 and-from the hoisting; mo tor through the-wires 30iand 32, the reversing switch 14, contact-34; and

wires

35 and 36, back to the 0ther,.sicle-,18'ot theline. From the controller 10 a shunt circuit is made through the contact 37 and through the magnet or solenoichBS- across toithe Wire '30 at the point 39. Inreversing themotor,--t'ne reversingswitches L1 and. 12 aresh ifted to earl-5 the-reversing switch l-t front-engagement with thecontact 3% intoengagement with the contact 22 and to carry.theirevers ing switch l2-froin engagement with the contact 22-into engagement with the contact d0, When the motor is out out, the controller 10 is located at the left of the position in which it is shown in Fig. 10, so that the motor circuit-is-lnokcn between the controller and the resistance 26 and the circuit for the solenoid 38 is. broken between the controller and contact 37. In starting the motor, the controller 10- isshifited-to the right thereby establishing an electrical connect-ion between the controllerand the resistance 26 and also between the controller and the contact 3?, and? completing the circuits for the motor and the solenoid 38, the continued movement of the controller to the right gradually reducing the ,resistanceiin the circuit with the motor and causing the motor to speed up gradually. In cutting out the motor to stop the car thecontroller 10 is shifted back toi-ts initial position, thereby breaking the electrical connection between the controller 10 and theresistancc 26 and also. between saidcontroller and contact 37.

The elevator hatchway, as shown in Fig. 6, is provided w-itlrdoorsorgates,-one -d0 or or onese-t ofdo orsootc0urse,,f0reachfloor which the elevator serves. In the preferred BEST AVAlLABLE COP\ form of the invention, mechanism is provided which, when the main hoisting motor is thrown out upon the arrival of the car at the floor at which the car is to stop, will operate automatically to open the door at that fioor, Themloorousetgt.doors -zt each floor and that part of the operating-mechanisnr therefor which is individual to that flew ar apli a sn the o s and the pend n ..-narts 9f. the. epv etihgg n isml ffqr e., henfl0et mm; Pr embodimentof the invention, the doors are all operated from a commonoperating or driving mechanism. The door driving mechanism isnoi mally out of operation and is thrown into operation upon the cutting out, of thetmain hoistingtmqtom and the doorsiare wall normally disconnected from said: drivingsmechanismi .,,\Vhen the-main hoisting ,motor is cut out with-the car subnected with. the door driving mechanism automatically.

As rshown in-F igs. ,l, and, 3 to 6' inclusive. ofv the drawings, the hatchway is provided at each. fioon-wit-lntwo cooperating: doors .68 and-7091: the Wellknown- :Peele-type-arranged toslide'in suitable, slides at the. sides of (the doorway. .These;doors are-connected hy cables 72; atthe oppositesendsmf the idoors, ea.cl i attached at one end to-thenpper door, 68, passing'over a ifixed pnll'ey 74 and attached at, its, other endto a bracket 76 vsecured to the lower door 70. The doors may be evenly counter-balanced or the upgperdoor may be slightly.heavierthanthe,lower secured rigidly to the shaft '82,-but is connected with'theishaft-by means ofa friction clutch comprising friction disks 90, one of which is secured rigidly to the shaft and the otheugaf whichis mountedto turnwith the shaft but ismovable longitudinally thereof and is held yieldingly inengagement with the sprocket by -means of -a. coiled spring 91... This frictional connection between thel door motor. and the. dooroperats wi h? r as nesse i e y'sde ic p eventing breakage of the parts of the'door BEST AVAILABLE COP;

position shown in dot and dash lines, Figure 3, by the weight 116. As the lower door-is carrieddownwardly in opening the doors, each of the pins 104 is disengaged from the slot 106 in the corresponding arm 107. As the lower door is elevated in closing the doors, the pins 104 are again engaged in the slots 106. W'hen the main hoisting motor is again thrown into operation, the cable 110 is lifted, thereby breaking the toggle. 1-20122, retracting the clutch hook 92' and the lever 124 to the positions shown in Fig. 3 and throwing the locking lever 98 into locking position at the floor at which the car has been stopped.

Figs. 7, 8 and 9 show a construction of line clutch and controlling mechanism-which may be advantageously employed in connection with a single door arranged to slide upwardly to open and downwardly to close.

The clutch mechanism shown in these figures comprises a clutch hook similarto the hooks 92, but secured to-the door indicated at 132 in a reversed position so that the hook is adapted to engage a block 134 secured to the cable 78.- The hook 130 is securedtoa rock shaft 136 mounted to turn in a bracket 138-secured to'the door to which shaft is also secured a weighted arm 140. Athird arm 142 secured to the-rock shaft 136 is formed with a slot 144 in which engages a pin 146 mounted in the upper end of a locking lever 148 pivoted at 150 on a bracket 152 secured to-the wall of the hatchway, the locking lever being arranged to engage a projection on a latch plate 153 secured to the door. In this construction as shown, the controlling cable 110 of the mechanismshown in Figs. 1 to 6 inclusive is eliminated, the line clutch and locking lever being respectively thrown into and out of operation by means carried by the car.

The hook 130 is normally held in retracted position and the locking lever 148 is normally held in locking position by a spring-154 mounted on a rod 156 and arranged to engage the lever 148. The hook is thrown into operating position and the locking lever is thrown outof locking position as shown in dot-and-dash lines Fig. 7 by means of a lever 158 pivoted at 160 on the bracket. 152 and connected with the looking lever by a link 162. The lever 158 carries at .its lower end a roll 164 arranged to engage the contact plate 128, on the car.

During the normal running of the car, the hook- 130 and the locking lever 148 at each floor respectively are thrown into and out of operative positions as the car reaches a position adjacent each floor and after the car passes a floor, the hook and the locking member are restored to their normal positions by the spring 154.- hen-the car is loca'tedat or substantially ata certain floor and :the. main hoisting -.motor .is. thrown out to stop the car at that .fioor, the door operating line 78 is thrown into operation and is actuated in. the direction of the arrow, Fig. 7, thereby elevating the door through the engagement of the block 134with the 70 hook 130. In closing the door, the door operating line 78 is reversed and the door is moved downwardly by the engagement of the block 134 with the-bracket 138.

The door operating mechanism in the preferred form of the invention illustrated in the drawing, comprises the door operating motor 84, a. brake 168 for controlling the motor and a motor brake solenoid 170 for controlling the action of thebrake. .W'hen the solenoid 170 is energized, the brake is released and when the solenoid is deenergized, the brake is applied to the motor by a spring 171.

The direction in which the-motor is driven is controlled by reversing

switches

172 and 173, the latter when closed connectingcircuits to drive the gate motor-in the opening direction andvthe former when closed connecting. circuits to drive the motor in the closing direction.

These switches may be closed .by the energization of solenoids 17 4 and 175,- respectively.

The solenoid 174 also operates a switch 176, and solenoid 173 also operates

switchesv

177 and 178. An. automatic relay or switch indicated as a whole at 179 operated by a solenoid 180 is provided, this solenoid controllingswitches 181, 182 and 183.

In the present construction, mechanism is 109 provided by which the doors, after they are started in operation, control their own operation. This mechanism in the present embodiment of the invention, comprises a chain or belt 184 passing about a sprocket secured 105 to the shaft 82 and about a sprocket on a shaft 185 on which are mounted a series of cams. As the shaft 82 is rotated in a direction to open the doors, the shaft 185 is 1'0- tated. in a clockwise direction, Fig. 1, and as 110 the shaft 82 is rotated in a direction to close the doors, the shaft 185 is rotated in a counter clockwise direction. The shaft 185 and the cams mounted thereon constitute a selector or knock-out device which opens and 115 closes various circuits hereafter to be described.

The reference number 186 indicates a commutator selector which is arranged to be driven through certain connections from the 120 hoisting drum 4 and which makes and breaks of the'switch 17 BEST AVAILABLE COPY 5:

in the manner above described.

The sole- The circuit through the armature of the "which is'-1ndtor--n'1ay =be-tmced irpmtheside 16 of the line through the

wires

230 and 242,-tlnrough.-

244; the wires 246 and 1 247,

the cent-103 226 ofthe switch-1 to, the wires 10 4.5931 1161' 25-1. thronglv the immature: 252 ly understood ot the motel; through the'wmesflfi 256 and:

the wife; i34- and-iifi through the eont aots-- cloiqe when the i elgyig. .eneggizd. 51nd per-..

thence thiough-wire ate to maintain the-eimuit-fiov the'relziyee.

"of-the iswitch -l ?2,- long as";thenminqhqisting -motor-iisuit .rc-stl 23 5610 th'e' ezmtzict then thtoughthe wire: and 24010 poinboi as lmigmsqthe-ebntaeils iiQtl-aggid 1&1. are.

h I a... ...16., in lit.

the. contacts 308 and310 close and may be traced from the wire196 through

wires

280 and 311, through

switch contacts

308 and 310, and wire 312, to wire 202, then through solenoid 175,to.\vire- 204 and on as before. When the doorihas reached the limit of its opening-movement, a cam 316 on the cam shaft 185 comes in contact with the knockout switch 206, thereby actuating the switch to separate the switch contacts and breaking the circuit ,for solenoid 175 controlling the reversing switch 173-. The breaking of the circuit for this solenoid causes the opening of the switch, thereby throwing out the, door operating motor and deenergizing the brake so that the brake is applied to the motor and the doors are brought to rest.

To close the door, one of the close push buttons 318 is pressed. Preferably there is one of these push buttons in the car and one at each floor outside of the hatchway. The depressing of this push button closes an initial circuit for energizing the solenoid 174 of the close reversing switch 172. The closing of this switch completes a circuit for the door motor 84 and brake solenoid 170, the motor is started-in the reverse direction and the door commences to close, the starter solenoid 260 operating as before. The initial circuit whereby the close reversing switch is energized starts from the point 192 and continues through contacts 190 and 191, through wire 193, across commutator 186 to contact 194, through wires 195 and 320, across the push button 318, to wire 322, thence through wire 324,through the solenoid 174 of the reversing switch to wire 326, thence to knock-out switch 328. The contacts of this switch are closed when the door is open and therefore, the circuit-continues through wire 330 and resistance 210 to wire 212, across stop button 216, wire 217, stop buttons 218, key switch 220 and through wire 222 to the side 18 of the line.

The energization of the reversing switch 172 closes the

switch contacts

332, 237 and 334, which completes the circuits for the motor 84 and brake solenoid 170. The circuit for the brake solenoid may be traced from the point 229, through

wires

230, 231 and 232, through the coilcf the brake solenoid '170, through the wire 234, vtheswitch contacts'237, wires 238 and'240tothe point 241 on the other side of the line. The cirshort circuit, the close thereby maintain the c rcuit of the close re- ;out switch and closes its contacts.

BEST AVAILABLE cot-w cuit for the motor uponstarting the motor may be traced from the point 229 on the line 16 through wires' 230, 242, resistance 244, wire 246, switch contacts 332,

wires

256, 254, through armature 252. From the armature, the circuit continues through wires 251, 250, 342, through switch contacts 334, contact 237, wires 238,and 240 to point 241 on the other side 18 of the line. The resistance 244 is .short circuited in the same manner as before by, the starter solenoid 260.

The close reversing switch 172 is provided with ahset of holding contacts 344 and 346 forming partof switch-17.6 which shunt or push button 318 and versing, switch 172 afterthe contacts of the push buttonseparate. The circuit for the reversing switch when -these holding contactsare closed and. thecofritacts of the push button have separated, may be traced from. the wire 195 through=wires 196, 280, 348, through switch contacts 344 and 346 to wire 324, throngh solenoid 174, and on as before.

When the doorisalmost' closed and preferably when it is within about an inch of full closure, a cam 350 on the cam shaft'185 comes in contact withknock-ont switch 328 and 'actuates the switch to separate the switch cont-acts. The separation, oft-he switch contacts opens the. circuit of the close reversing switch, the switch opens thedoor motor is thrown out and the brake is applied to the motor so that the door is brought to rest.

The door may be stopped at any time during its opening or closing -mov ement by pressingone of the

stop buttons

216, 218.

\Vhen the controller 10 is actuated to start the car, the solenoid 38 is energized, thereby opening the switch contacts 190 and 191, and actuating the levers 112 to lift the cables 110. By the opening of the switch contacts 190 and 191, the circuit of the door opening rela 179, which remains closed after the closing of the reversing switch 175 until the car is started, is inter-- rupted and the relay and switch contacts controlled thereby are restored to their normal positions. The mechanism is thus set for the next opening of the door. The lifting of the cables 110 throws the hooks 92 back out of operative position and swings the locking members 98 into locking position so that the door is locked when the elevator leaves the floor.

\Vhen all of the doors of the hatchway are closed, the knock-out switch 20 is held by a cam 352 on the cam shaft 185 in position to maintain the switch cont-acts closed. As soonas a door commences to open, the cam releases the knock-out switch and the switch opens, thereby opening the circuit for the main hoisting motor. When the door is closed, the cam 352 again engages the knock- Thus it is impossible to operate the car except when all of the doors are closed.

The door operating mechanism also prel e 'ahly comprises a series of open push-linttons 354: by means of which an operator may cause the opening of the door at the floor at which the car is located. As shown in the diagram, there is one of these pushbuttons provided for the car and one for location at each floor on the outside of the hatchway. -The circuits closed by the pressing of these open switches may be readily traced and need not be described in detail, the opening reversing switch of the door-operating motor being operated in substant'ally the same manner as when the motor is thrown in automatically on stopping the car. The.

relay 179, however, is not affected by the closing of the circuit completed by depressing any one of these buttons.

It is to be understood that the invention is not limited to the particular form thereof illustrated and described in the presen application, but that the invention may be embodied in other forms within the scope of the claims.

Having explained the nature oi the object of the invention and having specifically described the mechanism embodying the invention in its preferred form, what is claimed is:

1. An elevator mechanism hhving in combination a hatchway, a series of doors for said hatchway, a car, car hoisting means, a

door operating line for operating all. of the doors thrown into operation automatically upon stopping the car in normal operation, and means controlled by the car for connecting the door at the floor at which the car is stopped with said line for movement with the line while the other doors are disconnected from the line.

2. An elevator mechanism having in combination a hatchway, a series of doors for said hatchway, a car, car hoisting means. a door operating line for operating all of the doors, and means thrown into operation automatically and only upon stopping the car in normal operation to coimect the door at the floor at which the car is stopped with the door operating line positively for movement with the line while. the other doors of the hatchway are disconnected from the line.

3. An elevator mechanism having in combination a hatchway, a series doors for said hatchway, a. car. car hoist means. a door operating line for operating all of the doors, and means controlled by the car and thrown into operation automatically andonly upon stopping the car to connect the door at the floor at which the car is stopped with the door operating line positively for movement with the line while the other I f I BEST AVAlLABLE COPY doors of the hatchway are disconnected "rom the line.

4. An elevator mechanism having in combination a hatchway, a series of doors for said hatchway, a car, car hoisting means, a door operating line for operating all of the doors thrown into operation automatically upon stopping the car and means thrown into operation automatically and only upon stopping the car and operating to connect the door at the floor at which the car is stopped with the door operating line positively for movement with the line while the other doors-of the hatchway are disconnected from the line.

5. An elevator mechanism havin incombinaticn a hatchway, a series of doors for said hatchway, a car, car hoisting means, a

door operating line for operating all of the doors thrown into operation.automaticall-yupon stopping the car and means controlled by the car and thrown .into operation automatically and only upon stopping the car and operating to connect .the. door at the floor at which the car is stopped positively with said line for movement with the line while the other doors are disconnected from the line.

6. An elevator mechanism having in combination a hatchway, a series of doors forsaid hatchway, a car, car hoisting means, means for operating the doors and means thrown into operation automatically upon stopping the car and means controlled by the car cooperating to cause the operation of the door at which the car is stopped while the other doors remain closed.

7. An elevator mechanism having in combination a hatchway, a seriesof doors for said hatchway, a car, car hoisting means, a

door operating line for operating all of the doors, line clutches for connecting the several doors with' the door operating line and means thrown into operation automatically upon stopping the car in normal operation and means-controlled by the car cooperating to cause the clutching of the door at the floor at which the car is stopped to the line, while the other doors are unclutc-hed from the line.

8. An elevator mechanism having; in combination a hatchway, a series of doors for said hatchway, a car, car hoisting memeans for operating the doors, clutches .or connecting the doors with the door operating means, means thrown into operation automatically upon stopping the car for actuating sa'id clutches, con'iprising a connected with the several clutches, a v; 0 attached to the cable, means for raising and lowering the cable and a contact plate carried by the car, said last means and contact plate cooperating to cause the engageiinent of the clutch tor the door at the floor at which the car is stopped while the other clutches are disengaged.

9. An elevator mechanism having in combination a hatchway, a seriesof doors for said hatchway, a car, car hoisting means, a door operating line for operating all of the doors thrown into operation automatically upon stopping the car inlnormal ,operation, a clutch member carried by said line at each floor, a clutch member connected with each door for engagement with the corresponding clutch member on the line to connect the door positively with the line and means carried by the car for causing the actuation of the clutch member con nected with the door at the floor at which the car is stopped with the corresponding clutch member'on the line, while the clutch members connected with the other doors are held in their inoperativepositions.

10. An elevator mechanismj having in combination a hatc'hway, a series of doors for said 'hatchway, a car, car hoisting means, a door operating line, a clutch member carried by the line at each floor, a clutch member connected with each door for engagement -with the corresponding clutch member on the line, common means thrown into operationupon stopping the car in normal operation for actuating all of the clutch members connected with the several doors to carry the same into position to engage the corresponding clutch members on' the line and means carried by the car cooperating with said last means to cause the movement of the clutch member connected with the door at the floor at which the car is stopped into position to engage the corresponding clutch member on the line while the clutch members connected with the other doors are held in their normal inoperative positions.

11. An elevator mechanism having in combination a hatchn'ay, aseries of doors for said hatchway, a car, car hoisting means, devices for controlling the car hoisting means to start and stop the car, means for operating all of said doors arranged to be thrown into operation automatically when the car is stopped in normal operation and normally disconnected therefrom, and means controlled by the car for connecting the door at the floor at which the car is stopped with the door operating means While the other doors are disconnected from said means.

12. An elevator mechanism having in combination a hatchway, a series of doors for said hatchway, a car, car hoisting means, means for controlling the hoisting means to start and stop the car, means foroperating the doors normally disconnected from the doors, normally inactive means adapted to cause the connection of any one of the doors with said operating means, means for throwing said last means into op- BEST AVAlLABLE COPY eration and means controlled by the car for rendering said last means efiect'ive to connect the door at the floor at which the car is stopped with said door operating means while the other doors are disconnectcd from said means.

13 An elevator mechanisnr having in combination a hatchway, a series ofdoors for said hatcli\ vay,,a car, car hoisting means, means for cont-rolling the hoisting means to start and stop the car, means common to all of the doors for operating fall of the doors, -normally inactive means common to the severaldoorsadapted to c'ause tlie connectionv ofany one of said doorswith said operating means, mean'sfor-throwing said last means into operation an meanscom trolled by the car for rendering said la'st means effective to connect the rdoor at the iioorat which the penis sto ped with said door operating means while the otl ier doors are disconnected from said means. 7

1a. An elevator mechanism having; .in combination a hatchwa'y, a series of doors for-said hatchway, a car,- car hoisting means, means for controlling the hoisting m'eansto start and stop the car, means com'monflto the several doors and thrown into operationallto'n atically uponstopping normally thec'ar for operating all mon to the several doors, thrown. interoperation automatically uponstopping the car and adapted to cause the connection of any one of the doors with said operating means, and means controlled by the car for rendering said last means effective to) connect the door at the floor at which the car is stopped with said operating mea'n's while the other doors are disconnected [from means.

15. An elevator mechanism having in combination a hatchway, a series of doors {or said ha-tchway, a car, car hoisting means, means for controlling the hoisting means to start and stop the car, means for operating the doors, a single electro-magnetic device. means controlled by said electrdmag'neti'c device and means controlled by the car cooperating to cause the opening of the door at the floor at which the car is stopped while the other doors remain closed.

16. An elevator mechanism having in combination a hatchway, a series of doors for said hatchway, a car, car hoisting means, means for controlling the hoisting means to start and stop the car, means for operating the doors, and means comprising a single electro-magnetic device only for causing the opening of the door at the floor at which the car is stopped While the other doors remain closed.

17 An elevator mechanism having in combination a hatchway, a series of doors for said hatchway, a car, car hoisting means, means for controlling the hoisting means to of the doors, means .com-

bination a hatchway, a series ot-doorsfor said hatchway, a car, car hoisting means, a door operating line for operating all of the doors,-frictionally acting means for actuating said line, means for connecting any 'one of the doors positively with said line,

and meanscontrolled by themov'ement of a door for controlling the line'actuating means: 5 I

19. An elevator mechanism having in combination a hatchway, a series ofdoors for said hatchway, a car, car hoisting; means,

common'means for operating all of the doors, a friction drive for the dooroperating means, means for connecting the several doors with said operating 'means and disconnectingj-the same therefrom and means controlled by the movement of-a door for controllingthe door operating means.

20. An elevator mechanism having in combination a hatchway, a series of doors for said hatchway, a car, car hoisting means, means for controlling the hoisting means to startand stop the car, means for operating the doors, a single electro-magnetic device, means controlled by said device and thrown into operation upon stopping the car, and means controlled by the car cooperating to cause the doors to remain closed during the normal running of the car and to cause the opening of the door at a floor at which the car is stopped while the other doors remain closed.

21. An elevator mechanism having in combination a hatchway, a door for said hatch way, a car, car hoisting means, means for controlling the hoisting means to start and stop the car, means for operating the door, a clutch for connecting the door with said operating means, a solenoid, mechanism for operating the clutch, a connection between the solenoid and said mechanism. a contact plate carried by the car arranged to be en gaged by said mechanism and cooperating with the solenoid to cause said clutch to be maintained out of operation when the main hoisting mechanism is in operation and when the car is remote from a floor and to throw the clutch into operation when the main hoisting mechanism is thrown out of operation and the car is at or adjacent a floor.

22. An elevator mechanism having in combination a hatchway, a door for said hatchway, a car, car hoisting means, means for operating the door, and means thrown into operation automatically upon stopping the aEsT AVAILABLE COPY the car cooperating to cause the operation of said door when the car is stopped at or ad jacent the floor at which said door is located.

23. An elevator mechanism having in combination a hatchway, a door for said hatchway, a door operating line, a car, car hoist ing means, two interengageable line clutch members. one carried by the line and one connected with the door for connecting the door positively with the line for movement with the line, andmeans thrown into and out of operation automatically upon stopping and starting the car, and means controlled by the position of the car cooperating to move one of said clutch members into and out of position to engage the other clutch member.

24. An elevator mechanism having in combination, a hatchway, a series of doors for said hatchway, a car, car hoisting means, common means for operating the doors, a clutch at each floor for connecting the doors respectively with the door operating means, solenoid, mechanisms for throwing the several clutches into and out of operation, a connection between the solenoid and said mechanisms, a contact plate carried by the car arranged to be engaged by said mechanisms and cooperating with the solenoid to cause the clutches to be maintained out of operation when the main hoisting mechaism is in operation and when the car is remote from a floor and to throw the clutch into operation when the main hoisting mechanism is thrown off and the car is at or adjacentsaid floor.

An elevator mechanism having in combination a hatchway, a door for said hatchway, a car, car hoisting means, a door operating line, a clutch hook for connecting the door directly with .said line, a solenoid, means for throwing the clutch hook into and out of operation, a connection between the solenoid. and said mechanism, a contact plate carried by the car arranged to be engaged by said mechanism and cooperating with the solenoid to cause the clutch hook to be maintained out of clutching position with relation to the line when the main hoisting means is in operation and when the car is remote from a floor and to throw the clutch hook into operation when the main hoisting means is thrown out of operation and the car is at or adjacent a floor.

26. An elevator mechanism having in combination a hatchway, a door for said hatchway, a car, car hoisting means, a door operating line, a clutch hook for connecting the door directly with the line, mechanism comprising a toggle for operating the clutch hook, a solenoid, a connection between the solenoid and the central joint of the to gle for controlling the position of the togg e, a contact plate mounted on the car, and a lever connected with the toggle and arranged to engage the contact plate to control the position of the clutch hook through the toggle.

27. In combination a hatch-way, floor landings and gates along said hatchway at the several floors, a car and car hoisting means, a hand controllertherefor, gate operating mechanism comprising a movable member at each of said floors, a contact member on the car and means comprising an electromagnetic device common to all the gates and arranged to cooperate with said contact member to actuate the movable member upon moving the said controller to neutral position.

28. In combination a hatchway, floor landingsand gates along said-hatchway, a-car and car hoisting means, a hand controller for said hoisting means, means for moving the several gates and devices cooperating to cause said gate opening means to open a gate at one or'said fioors upon moving said controller to neutral position, comprising a contact member on the car, a movable member at the floor and an electromagnetic device common to all the gates and controlled from said controller.

29, In combination with an elevator car, a hoisting motor, a circuit therefor, 21 hand controller, gates at the several floors, gate opera-ting means, an electrically controlled device for controlling the gate operating means, a circuit for said device and switches for said circuits operated by said controller to break both said circuits upon moving the controller to neutral position.

30. In combination, a hatchway, floor landings and gates, a car and car hoisting means, a hand controller, gate operating means, a cam and lever for controlling said gate operating means, an electromagnetic device forrelati'vely actuating said cam and lever, a circuit for said hoisting means, a circuit for said electromagnetic 'device, -a-nd meansfor opening both of said-circuits upon the moving of said hand controller-to its neutral position.

Signed at Hoboken, New Jersey, this-5th day of October 1921.

CLIFFORD NORTON. JOHN G. GUSTAFSON. NEVILLE s. DICKINSON.

Bil