US1566374A - Elevator - Google Patents

Description

Dec. 22, 1925.

L. CHASAN ELEVATOR Filed Aug. 21, 1525 5 Sheets-'Sheet 1.

INVENTOI? Dec. 22, 1925. 1,566,374

' L. CHASAN ELEVATOR Filed Aug. 21, 1923 5 sheets sheet 2 a Q INVENTOR /Z L MW %k I, [ml 3 j TTmM/Ew Dec. 22, 1925. 1,566,374

I 1.. cHAsAN ELEVATOR Filed Aug. 21, 1923 5 Sheets-Sheet 4 A TTOR E 75 Dec. 22,1925. 1,566,374

L. CHASAN ELEVATOR Filed Aug. 21, 1923 5 Sheets -Sheet 5 Patented Dec. 22, 1925.

UNITED STATES v v 1,566,374 PATENT OFFICE.

LOUIS CHASAN, OF NEW YORK, N. Y,., ASSIGNOR TO SI-IUR LOG ELEVATOR SAFETY COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ELEVATOR.

To all whom it may concern:

Be it known that I, LOUIS CHAsAN, a citizen of the United States, residing in the borough of Bronx, in the city ofNew York and State of New York, have invented certain new and useful Improvements in Elevators, of which the following is a speci-' fication, reference being had to the accompanying drawings, forming a part hereof.

This invention is concerned particularly with the means whereby the elevator car gate or the shaft door or both, are operated by power under the control of the operator, and to the interlocking devices by which the movement of the car is prevented when the car gate or the shaft door is unlocked for movement. In the embodiment of the invention which is illustrated and described herein, there is mounted onthe car a carriage which is reciprocated by power. under the control of the operator, such carriage being directly connected with the car gate by means which permit the ready disconnection of the two when necessity arises, and provision is made by improved means for effecting operative connection between the car riage and each'shaft door, under the control of the operator when the car is in position for such "operation, the means being of such a character that-there is no liability to breakage during the movement of 'the car by reason of carelessness-on the part of the operator or accident. Provision is also made whereby the car switch, by which the movement of the car is controlled,;is locked mechanically before the opening movement of the gate or door is commenced and is kept locked throughout the opening and the closing movement of the gate oridoor until the gateor door is returned to its locked position.- Means are also provided whereby, in an emergency, the gate or door or both can be released for opening without operation of the motor, as in case of failure of power, the car switch nevertheless remaining locked. There are also provided emergency devices, as sometimes required by statute or ordinance, whereby the car can be operated while the gate or door is open. Other features of the invention will be more particularly referred to hereinafter.

In the accompanying drawings, in which the invention is illustrated as embodied in an approved and practical form,

Figure 1 is a view in elevation, somewhat Application filed August 21 1923. Serial No. 658,480.

diagrammatic, showing so much of an elevator car and its associated parts, together with a portion of a shaft door, as is necessary to enable the invention to be understood, some of the parts being, for clearness, shown slightly displaced from their preferred positions. D

Figure 2 is a view in elevation of some of the parts shown in Figure 1, but on a larger scale, the partsabove referred to as being shown displaced in Figure 1 being 'here shown in their proper relative' positions.

Figure 3 is a composite sectional view on the plane indicated generally by the broken lines 33 of Figures 1 and 2, looking in the direction of the arrows, and on a larger scale than that of Figure 2. '7

Figure 4 is a detail view' in section on the plane indicated by the broken line 4-4 of Figure 2, looking in the direction of the arrowsfon a larger scale and with some parts elevation and partly in section as seen from p the right hand in Figure 6.

Figure. 8 is a detail view in elevation showing particularly the devices for locking the shaft door.

Figure 9 is a detail view in elevation showing particularly the motor and its immediate connections.

Figure 10 is a group view showing successive' positions of the valves which determine the movement of the motor piston.

Figure 11 is a view in elevation showing particularly the means for controlling the .motor valves through the movement of the motor piston.

Figure 12 is a detail view of the valve controlling devices as seen from above.

Figures 13 and 14 are detail views showing also portions of the valve controlling devices. a

Figures 15 and 16' are detailed views in elevation of the lever. shown in Figure 1,

in its two extreme positions of travel.

In the general assembly represented in Figure 1 of the drawings the car a, which drum may be of any usual or suitable construction, is indicated mainly in outline, with a car gate 72 and a shaft door 0, which may also be of any suitable construction, and are shown only in part. A portion of the car gate is shown also in Figure 2 and a portion of the shaft door in Figures 3 and 8. On the top of the car is mounted a frame (Z which is shown (Figures 1, 2, 3 and ll as composed of horizontal rails 41' and end brackets (Z the rails d forming a support for a reciprocating carriage e, which, through an arm e, is operatively connected with the car gate b so t-hat the car gate may be opened or closed through the movement of the carriage. In order that it may be possible to disconnect readily the cargate from the carriage, when conditions require, the connection between the carriage and the car gate is effected through a spring pressed plunger or latch 6, adapted to engage a block 6 which is carried by the arm 6', and mounted in a block 6 secured to the gate. the latch or plunger 6 being provided w th a convenient means, such as the ring 6 by wh ch disconnection of the gate from the carriage can be effected readily. Under ordinaryconditions of operation the carriage 'e is connected at all times with the car gate, but provision is made, as will be described hereinafter, whereby the carriage can be connected operatively, at the will of the car operator, with any shaft door a. I

Also mounted on the car is a motor 7 which may be of any suitable character but is shown (see particularly Figures 2, i and 9) as consisting of an air cylinder f, a piston f and a piston rod f which is adapted to be placed in operative connection, as now described, with the carriage e. As shown each end of the piston rod 7 has connected thereto a cable 7" which passes about an idler f the end brackets 61 and also passes about and is secured to a drum 9 which is mounted loosely on a shaft 9', supported in suitable hearings in the other bracket 0Z Adjacent the drum 7, on the shaft 9, and connected therewith by a spline as at so as to rotate therewith but to be free to move longitudinally thereon, is a clutch member held normally by a spring g in operative engagement with the drum g. It may be disengaged therefrom at the will of the operator by any convenient means, such as the bell crank lever provided the pull 9 and a retaining hook or device 7 by which,

when desired, the clutch member 9 can be held out of operative engagement with the g. The shaft 1' also has secured thereon a drum to which is secured a cable g the ends of which are connected, as at to the carriage e. The cable 9* passes about an idler g, mounted in the mounted in one of ment. Through the means just described or equivalent means the car gate and the shaft doors may be moved to open or close by the motor under control of the operator as will be explained.

The power for the operation of the motor may be derived from any suitable source. In the construction shown air under pressure is supplied from a tank It also mounted on the car and charged by any convenient means. Through pipes h the tank It is connected with the cylinder 7 near its ends,

the admission of air to one end or the other of the cylinder and the exhaust at one end or the other being controlled by the operator, or automatically through the regulation of valves h and if, the several positions of which are shown in the several parts of Figure 10 as will now be described briefly.

In part I of Figure 10 both valves k and h are shown as closed, the carriage being then in its extreme left hand position as indicated in Figures 1 and 2 with the car gate and the shaft door closed. In part II of Figure 10, the valve k is shown in position to admit air to the right hand end of the cylinder and valve kg. in position with the exhaust open. Under these conditions the position, shown the right hand, opening both the car gate and the shaft door through the described connections. As the car gate approaches its open position the valve k will be shifted automatically as hereinafter described to shut off the admission of air to the right hand end of the cylinder so that the valve it remains in position as before, with the exhaust at the left hand end of the cylinder ,open. As the gate approaches still further its open position the valve k remains in the position last described but the valve k is shifted so as to close the exhaust, thereby cushioning the piston and the movement of the gate and door so as to prevent slamming. The gate and door being now fully opened and it being desired to close the same, the valves are shifted, under the control of the operator, to the, position shown in part V, air being then admitted to the left hand end of the cylinder while the exhaust at the right hand end is open. The closing movement of the gate and door then begin. As they approach the fully closed position the valve k is shifted to the position shown in part VI, cutting off the admission of air to the left hand end of the cylinder, the valve h remaining in its former position with the exhaust open. As the gate and door approach more nearly to the fully closed position the valve it remains in the same position as before and the valve h is shifted to close the exhaust thereby cushioning the piston and its connections and preventing the slamming of the gate and door.

The connection of the carriage to each shaft gate is effected through a channeled shoe to be described which engages an arm a of the shaft door. This arm has pivoted thereon a pawl 0' which is adapted to engage a rack c fixed on some part of the shaftway. This pawl has a cross head 0* which is provided with pins 0 and 0 which lie in notches a and o in the edges of the arm 0. The'first effect of movement of the shoe above mentioned with the carriage, is, through contact with the pin 0 to disengage the pawl 0 from the rack 0 so as to release the door, the continued movement of the shoe with the carriage through contact with the arm 0, effecting the movement of the door as above described. In the closing movement of the carriage the other side of the shoe contacts with the pin 0 and holds the pawl away from the rack, thereby preventing noise.

The means whereby the valves h and k are controlled will now be described. To

the stem k of each valve'h and k is secured a T-shaped fixture h? which has an arm k and two arms h and 72. in different planes. Each arm h carries a pin 71. which'is engaged by a slotted member 2' of a rod 11, the members 2' being slotted so as "to movement of. the valve stems independently of the movement of the rod 71' while providing for movement of the valve stems through movement of the rod 2'. The rod i is connected through a bell crank 2' and a rod 2' with the operators starting lever i which is suitably mounted on the car. By suitable movement of the lever 2", the operator, therefore, is able to shift the valves h and k for the purpose of initiating the movement of the gate and door from either position of rest. The further shifting of the valves, during the movement of the gate and door, until they come to rest, is effected automatically. For this purpose there is connected to the piston rod 7, by arms 70, a rod k which partakesof the movement of the piston. This rod is is armed with four lugs k k and if, the lugs 10 and la co-operating respectively with the arms k" and k of the valve b and the lugs kand I0 00- operating respectively with the arms hand it of the valve h". In the movement of the rod is with the, piston rod i the lugs [0 k, 53 10 through the arms if, b of the two valves, effect the shifting'of the valves illustrated in detail in Figure 10 and above described. As indicated in Figure 11 each of the lugs W, 72 k, W, is secured adjustably on the rod is as by a set screw it permit so that the points of cut off and opening can be varied as the conditions of the particular installation may require.

It will be understood that after the initial operation of the valves by the operator, the arms h, h" and k of eachvalve stem 71, are left.at a position of about 45 to one side or the other of that shown in Figure 12, depending uponwhether the carriage is started by the operator from the closed position or from the open position.

In the movement ofthe rod '70 abm'e described the longer or higher lugs I0 70 one of which, k is shown in Figure 14, will co-operate respectively with the arms 71, in the higher plane and the shorter or lower lugs 1: 70 one of which is shown in Figure 13, will co-operate respectively with the arms [L8 in the lower plane.

The shoe above referred to, by which the reciprocating carriage is operatively engaged with each shaft door as required, indicated generally at Z in Figures 1, 2 and 3, is movable toward and away from the plane of the arms 0' of the several shaft doors, being moved into such plane for engagement with the armas the elevator car is brought to rest in proper position with rspect to the door to be opened, and being retired from such plane while the car is in motion so that neither through carelessness nor through accident will the shoe be in position to collide with any of the arms 0' or other parts of the shaft during the movement of the car. To this end the shoe is connected to the carriage e by links Z, shown particularly in Figures 2 and 3 so that the shoe Z may have a parallel movement with respect to the carriage. The shoe carries at its back a friction roller Z which bears against a barm supported at the ends of the frame 03 by arms m which are pivoted upon studs m shown particularly in Figure 2, so that the bar on can be moved toward or from the plane of the arms 0 of the shaft doors. To effect such movement of the bar m it is providedon its rear side with a cam surface 771. for cooperation with a roller m which is carried by a vertically movable bracket m which has also a limited swinging movement in a plane parallel with the plane of the carriage. It is therefore guided at its lower end by a stem m in a bracket m which in turn is pivoted on a stud m secured to oneof the rails d1 of the frame 01. At its upper end thevbracket' m is forked, as at m to'straddle a part fit to be referred to, operative engagement. of the bracket m with'such part n. being effected through a pin m indicated in Figure 1 and by dotted which isv pivoted at a. One arm n is notched as at a for engagement with a pin 12. on the carriage c.

When the carriage a is in the left hand position shown, the pin n is in engagement with the notch n of the lever a". As the movement of the carriage to the right hegins preparatory to the unlatching and opening of the door the pin a carries the lever 72 to the position indicated in Figure 15. This movement of the lever 911 through a slotted arm n, moves downward the bracket m and the roller m co-acting with the cam surface m of the bar m, moves the bar in to the right in Figure 3 and the bar m, co-acting with the roller Z moves the shoe Z from its normal position into position for engagement with the arm 0 of the shaft door. As the carriagecontinues its movement the pin or moves out of engagement with the notch n leaving the lever n in the position shown in Figure 15. "When the carriage returns to its left hand position, the door having been closed, the pin a again enters the notch 12, and moves the lever 7L2 from the position shown inFigure 15 to the position shown in Figure 1, thereby, through the slotted arm n, raising the bracket m and removing the roller m from contact with the cam surface m The shoe z, by gravity, then swings back into its inoperative position.

The lever a is also interconnected with the locking devices and in order that its relation thereto may be understood it will be necessary now to describe the interlocking devices.

The ordinarycar switch, by which the movement of the car is controlled by the operator, is indicated at 0. It is shown as having a segment 0 which is notched as at 0 for engagement with the locking rod 0 When the car is in motion the rod 0 is down, out of the notch 0 and the switch can then be operated to control the movement of the car. Whenever, however, the switch has been moved from its position of rest, the segment 0" prevents upward movement of the locking rod 0 and, through the devices to be described, prevents operation of the means to move the carriage. Likewise,when the starting switch is in the initial position and the movement of the valves to start the. carriage is initiated, the locking rod is moved up into engagement with the last sector and in that position prevents the movement of the switch to start the car. In a' convenient position, preferably below the floor of the car, the locking rod or an eX- tension thereof passes through a housing 0 in which is mounted, on a stud 0 a cam 0 which is adapted toco-operate with a roller bearing stud 0 fixed in the locking rod. The cam 0 is connected through an arm 0 a rod 0 (see Figures 1, 6 and 7), which has a lost motion connection 0 a bell crank 0 and a rod 0 with the door controlling lever i so that when the lever i is operated to initiate the shifting of the valves it brings about the opening of the door, thecam 0 is operated to raise the locking rod 0 and so lock the car switch against movement even before the actual movement of the door begins. The locking rod is engaged automatically and held in its raised or locking position by a counter-weighted pawl or detent 7), having a shoulder at p for engage ment with the other end of the stud 0", and in order that this pawl or detent may be disengaged and release the locking rod as soon as the gate operating carriage has been returned to its closed position, the pawl 19 is connected by a flexible connector p with the arm W of the three-armed lever a above mentioned. As the carriage nears its closed position its pin a, as above described, enters the notch n in the arm n of the lever and moves it from the position shown in Figure 15 to the position indicated in Figure 1, which movement, through the connector p withdraws the detent p and permits the locking rod to drop and to release the car I switch 0 for further, operation.

In the event of any failure of the motive power which is relied upon under ordinary conditions for the opening of the car gate or the shaft door it is desirable that it should be possible to open the door by the operator, a condition of safety being at the same time brought about by the interlocking of the car switch or controller and maintained thereafter as long as the door is open or unlocked. To this end there is provided a foot press or pedal g (in order that the operators weight may be utilized), which is connected through a bell crank q, with a link 9 having a lost motion connection at 9 a bell crank 9 a link 9 a bell crank 9 and a slotted rod 9 with the arm n of the threearmed lever a above mentioned. Pressure on the foot press 9 pulls the lever n from the position indicated in Figure 1 toward the position shown in Figure 15. It is a characteristic of the devices disclosed herein that complete closing of the door. takes place a little before the carriage e completes its N the movement of the shoe Z into-engagement with the arms 0 which is brought about by the engagement of the upper end of the slot n with the pin m of the bracket m, the downward movement of the bracket m and the forward movement of the bar m to advance the shoe Z into engagement with the arms 0. Themovement of the bell crank 9, through a link 9 effects movement of the cam 0 to raise the locking rod 0 and thereby prevent movement of the carv switch. vThe provision of the lost motion devices at 0 and 9 permits operation of either the foot press 9 or the door controlling lever'vl independently of the other.

It has just been stated that the carriage, in its closing movement, moves a little after the shaft door has been completely closed. Such movement is ordinarily effected by the motive power supply, but when such power fails, as has just'now been assumed, it is obvious that some other means must be provided to continue the movement of the carriage for a little after the door has been closed completely by the operator. For this purpose a spring a is connected to the arm n in which energy is stored during the movement of the lever 11, from the position indicated in Figure 1 to the position shown in Figure 15. The lever n is held in its secondary position as well in operation under normal conditions as in operation under the abnormal condition last referred to, that is, in theevent'of failure of power, by a spring pressed detent n which normally holds the lever n in its secondary position and is acted upon by the door, in the last of its closing movement, to release the lever 91. so that, through the energy stored in the spring a the movement of the carriage will be continued for a little after the door has been closed completely. Of course the spring a acts even when the mechanism is operated under normal conditions but under normal conditions the motor is the main factor in the return of the carriage to its extreme left hand position.

It will be understood that in practice the car gate 6 will be disengaged from the carriage '5 through operation of the latch b and the gate opened in order that the operator may have access to the shaft door 0: for the purpose of opening it.- It will alsov be understood that through disengagement of the clutch member 9 it is possible to disconnect the carriage from the motor and; therefore obviate the necessity of moving the motor piston when the shaft door is to be opened by hand as above described.

Statutesor ordinances sometimes require that in elevator installations it shall be possible to move the car even when the car gate -or the shaft doors are opened. To meet this requirement the detent n which holds the lever n in its secondary position, is connected by a flexible connector n with an emer-' gency pull indicated at 02 When thelever n has been moved into its secondary position the operation of the car switch, to move the car, is prevented under ordinary conditions, but the release of the detent n by the emergency .means just described permits the lever n to return to its normal or initial position, notwithstanding the fact that the opening movement of the gate or door has commenced, and therefore unlocks the car switch and permits the car to be moved.

Theoperation of the several parts of the improved structure has been explained in connection with the description of the construction of such parts; The operation in general may be briefly described as follows: Motive power being supplied from any suitable source and the parts being in the positions represented in Figure 1 (with some igures 2 and 3, with the carriage in its extreme left hand position, the car gate fully closed, the car in position at a landing and at rest, and the shaft door fully closed, the operator pulls down the handle of the lever i. This movement shifts the cam 0 to raise the locking rod 0 into engagement with the car switch and prevent operation thereof to start the car either up or down. The same movement shifts the valves k and b from the positions shown in part I of Figure 10 to the position shown in part 11 thereof and this operation starts the .movement of the carriage to the right and then moves the shoe Z into engagement with the arm 0'. Through the connection of the shaft door in this manner and of the car gatethrough the arm 6' with the carriage both the gate and the door are moved together toward the right. As the carriage moves toward its right hand position, first the air is cut off from the driving end of the cylinder'and then the exhaust at the other end is closed 1 so that the carriage is cushioned and the door and gate open together without slamming. 'When the door and gate are to be closed the handle of the lever i is moved up and the valves k and k are shifted so as to bring about the movement of the carriage in the opposite direction, such movement being continued and finallycushioned substantially as above described. The operation under 1. In an elevator, the combination of a car, a car gate, a reciprocating carriage and nection between the same and the carriage.

3. In an elevator, the combination of a car, a reciprocating carriage mounted on the car, a vertically channeled shoe supported on the carriage, a shaft door having an arm to be engaged by the shoe, a fixed rack, and a T-headed pawl adapted to engage said rack' and pivoted on said arm and having a pin disposed at the side of said arm and adapted to be engaged by the side of the channeled shoe to disengage the pawl from said rack preliminary to and during the movement of the arm with the shoe.

' 4. In an elevator, the combination of a car, a frame mounted on the car, a reciprocating carriage mounted on the frame, an air cylinder, piston and piston rod mounted on the car, a driving pulley and idler mounted on the frame, a cable having its ends connected to the piston rod and passed about the driving pulley and the idler, a second driving pulley also mounted on thevframe in operative relation with the first mentioned pulley, a corresponding idler, and a cable passed around the second driving pulley and idler and having its ends connected to the reciprocating carriage.

5. In an elevator, the combination of-a car, a frame mounted on the car, a reciprocating carriage mounted on the frame, an air cylinder, piston and piston rod mounted on the car, a driving pulley and idler mounted on the frame, a cable having its ends connected to the piston rod and passed about the driving pulley and the idler, a second driving pulley also mounted on the frame in operative relation with the first'mentioned pulley, a corresponding idler, a cable passed around the second driving pulley and idler and having its ends connected to the reciprorating carriage, and a manually controlled clutch between the driving pulleys.

6. In an elevator, the combination of a car, a reciprocating carriage, a shaft door, a shoe movably mounted on the carriage, and 'means to move the shoe bodily toward and from the shaft door and into and out of operative engagement therewith.

7. In an elevator, the combination of a car, a reciprocating carriage, a shaft door, a shoe mounted movably on the carriage and adapted for operative engagement with the shaft door, a bar mounted on the carriage in operative relation with the shoe and movable to effect operative engagement'of the shoe with the shaft door, said bar having a cam surface, a vertically movable bracket for co-operation with said cam surface, and means to move the bracket in a vertical direction to effect movement of the shoe into operative engagement with the shaft door.

8. In an elevator, the combination of a car, a reciprocating carriage, a shaft door, a shoe mounted movably on the carriage and adapted for operative engagement with the shaft door, parallel links supporting the shoe from the carriage, a bar mounted on the carriage in operative relation with the shoe and movable to effect operative engagement of the shoe with the shaft door, said bar having a cam surfs ce, a vertically mova ble bracket for co-operation with said cam surface, and means to move the bracket in a vertical direction to effect mgvement of the shoe into operative engagement with the shaft door. I e

9. In an elevator, the combination of a car, a reciprocating carriage, a shaft door,

a shoe mounted movably on the carriage and adapted for operative engagement with the shaft door, depending parallel links supporting the shoe from the carriage, a bar mounted to swing on the carriage in operative relation with the shoe and movable to effect operative engagement of the shoe with the shaft door, said bar having a cam surface, a vertically movable bracket for co-operation with said cam surface, andmeans to move the bracket in a vertical direction to effect movement of the shoe into operative engagement with the shaft door.

10. In an elevator, the combination of a car, a reciprocating carriage, a shaft door, a shoe mounted movably on the carriage and adapted for operative engagement with the shaft door, a bar mounted on the carriage in operative relation with the shoe and movable @to effect operative engagement of the shoe with the shaft door, said bar having a cam surface, a vertically movable bracket for co-operation with said cam surface, a

lever mounted on the car and adapted for operative engagement with the carriage, and intermediate connections whereby, on movement of the lever with the carriage, the bracket is moved to actuate the bar and to move the shoe into operative engagement with the shaft door.

11. In an elevator, the combination of a car a reciprocating carriage, a shaft door, a shoe mounted movably on the carriage and adapted for operative engagement with the shaft door, a bar mounted on the carriage in operative relation with the shoe and movable to effect operative engagement of the shoe with the shaft door, said bar having a cam surface, a vertically movable bracket for cooperation with said cam surface, a lever mounted on the car and adapted for operative engagement with the carriage, and an arm connected with said lever and slotted for engagement with the vertically movable bracket.

12, In an elevator, the combination of a car, a reciprocating carriage, a shaft door, a shoe mounted movably on the carriage and adapted for operative engagement with the shaft door, a bar mounted on the carriage in operative relation with the shoe and movable to effect operative engagement of the shoe with the shaft door, said bar having a cam surface, a vertically movable bl'ttChet for co-operation with said cam surface, a lever mounted on the car and adapted for operative engagement with the carriage, an arm connected with said lever and slotted for engagement with the vertically movable bracket, and a. pivoted support for said bracket to permit limited swinging movement of the bracket withsaid lever and arm.

13. In an elevator, the combination of a car, a reciprocating carriage mounted on the car, a shoe mounted movably on the car for movement into and out of operative engagement with a shaft door, a lever mounted on the car and adapted for operative engagement with the carriage, and intermediate means actuated by movement of the lever to effect movement of the shoe into operative engagement with the shaft door.

14. In an elevator, the combination of a car, a reciprocating carriage mounted on the car, a shoe mounted movably on the car for movement into and out of operative engagement with a shaft door, a lever mounted on the car and adapted for operative engagement with the carriage, intermediate means actuated by movement of the lever to effect movement of the shoe into operative engagement with the shaft door, and a spring in which energy is stored by the movement of the lever in the opening movement of the carriage and by which energy is returned to the lever to complete the closing move-- ment of the carriage.

15. In an elevator, the combination of a car, a reciprocating carriage mounted on the 'car, a shoe'mounted movably on the car for movement into and out of operative en'- gagement with a shaft door, a lever mounted on the car and adapted for operative engagement with the carriage, intermediate means actuated by movement of the lever to elfect movement of the shoe into operative engagement with the shaft door, and a detent for engagement with the lever to prevent movement thereof from its secondary position after movement with the carriage in the openingmovement of the carriage, said detent being also in operative relation with the carriage to release the lever during the last of the closing movement of the carriage.

16. In an elevator, the combination of a car, a reciprocating carriage mounted on the car, a shoe mounted movably on the'car for movement into and out of operative engagement with a shaft door, a'lever mounted on the car and adapted for operative engagement with the carriage, intermediate means actuated by movement of the lever to effect movement of the shoe into operative engagement with the shaft door, a detent for engagement with the lever to prevent movement thereof from its secondary position after movement with the carriage in the opening movement of the carriage, said detent being also in operative relation with the carriage to release the lever during the last of the closing movement of the carriage, and means under control of the operator for actuating the detent to release the lever.

17. In an elevator, the combination of a car, a. reciprocating carriage mounted on the car, a shoe mounted movably on the car for movement into and out of operative engagement with a shaft door, a lever mounted on the car and adapted for operative engagement with the carriage, intermediate means ment with the shaft door, a detent for engagement with the lever to prevent move-- ment thereof from 'its secondary position after movement with the carriage in the opening movement of the carriage, said detent being also in operative relation with the carriage to release the lever during'the last of-the closing movement of the carriage, and means under the control of the operator to move the lever to initiate the opening movement of the carriage.

18. In an elevator, the combination of a car, a reciprocating carriage mounted on the car, a shoe mounted movably on the car for movement into and out of operative engagement witli a shaft door, a lever mounted on the car and adapted for operative engagement with the carriage,.intermediate means actuated by movement of the lever to effect movement of the shoe into operative engagement with the shaft door, a detent for engagement with the leverto prevent movement thereof from its secondary position after movement with the carriage in the opening movement of the carriage, said detent being also in operative relation with the carriage to release the lever during the last of the closing movement of the carriage, power driven means to reciprocate the carriage, and means under the control of the operator to move the lever to initiate the opening movement of the carriage.

19. In an elevator, the combination of a car, a reciprocating carriage mounted on the car, a shoe mounted movably on the car for movement of the shoe into operative engagement with the shaft door, a detent for engagement with the lever to prevent movement thereof from its secondary position after movement with the carriage in the opening movement of the carriage, said detent being also in operative relation with the carriage to release the lever during the last of the closing movement of the carriage, means under the control of the operator to iove the lever to initiate the opening movement of the carriage, a car switch, a locking bar therefor, and devices actuated by the movement of said last named means to move the locking bar into locking relation with the car switch. 7

20. In an elevator, the combination of a car, a reciprocating carriage mounted on the car, a shoe mounted movably on the car for movement into and out. of operative engagement with a shaft door, a lever mounted on the car and adapted for operative engagement with the carriage, intermediate means actuated by movement of the lever to effect movement of the shoe into operative engage-- ment with the shaft door, a detent for engagement with the lever to prevent move ment thereof from its secondary position after movement with the carriage in the opening movement of the carriage, said detent being also in operative relation with the carriage to release the lever during the last of the closing movement of the carriage, power driven means to reciprocate the carriage, means under the control of the operator to movethe lever to initiate the opening movement of the carriage, a car switch, a locking bar therefor, and devices actuated by the movement of said last named means to move the locking bar into locking relation with the car switch.

' 21, In an elevator, the combination'of a car, a reciprocating carriage mounted on the car, a shoe mounted movably on the car for movement into and out of operative engagement with a shaft door, a lever mounted on the car and-adapted for operative engagement with the carriage, intermediate means actuated by movement of the lever to effect movement of the shoe into operative engagement with the shaft door, a detent for en-- gagement with the lever to prevent movement thereof from its secondary position after movement with the carriage in the opening movement of the carriage, said detent being also in operative relation with the carriage to release the lever during the last of the closing movement of the carriage, means under the control of the operator to move the lever to initiate the opening movement of the carriage, a car switch, a locking bar therefor, devices actuated by the movement of said last named means to move the locking bar into locking relation with the car switch, a detent to hold the locking bar in locking position, and an operative connect-ion between said lever and said detent whereby in the last of the closing movement of the carriage the movement of the lever moves the detent to release the locking rod.

22. In an elevator, the combination of a car, a reciprocating carriage mounted on the car, a shoemount-ed movably on the car for movement into andont of operative engagement with a shaft door, a lever mounted on the car and adapted for operative engagement with the carriage, intermediate means actuated by movement of the lever to effect movement of the shoe into operative engagement with the shaft door, a detent for engagement with the lever to prevent movement thereof from its secondary position after movement with the carriage in the opening movement of the carriage, said detent being also in operative relation with the carriage to release the lever dui ing the last of the closing movement of the carriage, power driven means to reciprocate the carriage, means under the control of the operator to move the lever to initiate the opening movement of the carriage, a car switch, a actuated by the movement of said last named means to move the locking bar into locking relation with the car switch, a dctent to hold the locking bar in looking position, and an operative connection between said lever and said detent whereby in the last of the closing movement of the carriage the movement of the lever moves the detent to release the locking rod.

23. In an elevator, the combination of a car, a reciprocating carriage, a controlling device for the car, a locking rod for the controlling device, devices actuated by the operator to move the locking rod to locking position, a detent to retain the locking rod in looking position, during the movement of the carriage, and means actuated by the carriage during the last of its closing movement to move the detent to release the looking rod.

24. In an elevator, the combination of a car, door operating devices mounted on the car, means actuated by the operator to control the door operating devices, a car controller, a locking rod therefor, means actuated by the movement of the controlling means to move the locking rod to locking position, a detent to retain the locking rod in locking position during the operation of the door operating means, and means actuated by the last of the closing movement of the door operating means to move said detent to' release the locking rod.

25, In an elevator, the combination of a car, a controlling device, a locking rod therefor, a cam to move the lockingrod to locking position, means to actuate the cam, a detent operating normally to retain the looking bar therefor, devices locking rod in locking position, andimeans to move the detent to release the locking rod. I

26. In an elevator, the combination of a car, a controlling device, a locking rod therefor, a cam to move the locking rod to locking position, means to actuate the cam, a counterweighted pivoted detent to retain the locking rod in looking position, and means to move the detent against the counterweight to release the locking rod.

27. In an elevator, the combination of a car, door operating means mounted on the car, a fluid pressure motor for said operating means the same comprising a cylinder, a piston and a piston rod, valves to control the admission and exhaust of the motive fluid to and from the cylinder, said valves having valve stems, arms connected to the valve stems, means under the control of the operator and connected to said arms Whereby the valves are shifted to initiate the movement of the piston, other arms also connected to the valve stems, a rod connect- -ed to the piston rod to move therewith, and

lugs mounted on said rod for co-operation With said other arms of the valve stems, whereby the admission and exhaust of motive fluid to the cylinder is controlled by movement of the piston rod after initiation of its movement under control of the operator.

This specification signed this 9th day of August, A. D. 1923.

LOUIS CHASAN.

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