US1206407A - Hydraulic-elevator control. - Google Patents

Description

'J. E. BOYCE.

HYDRAULIC ELEVATOR CONTROL.

APPLICATION nuzu MAR. 10. 1913.

1,206,407. Patented Nov. 28, 1916.

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J. E. B 0YCE. HYDRAULIC ELEVATOR CONTROL. 7 APPLICATION FILED MAR. 10, 8913. 1,206,407. Patented Nov. 28, 1916.

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ITTO [Y J. E. BOYCE.

HYDRAULIC ELEVATOR CONTROL. APPLICATION FILED MAR- !0, 1913.

1,206,407. v PatentedNov. 28, 1916.

3 SHEETSSHEET 3.

WITNESSES. IN VE N T UNITED STATES PATENT OFFICE.

JOHN E. BOYCE, 0F PEEKSKILL, NEW YORK, ASSIGNOR TO OTIS ELEVATOR COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATIGN OF NEW JERSEY.

HYDRAULIC-ELEVATOR CONTROL.

Application filed March 10, 1913.

To all whom it may concern Be 1t known that I, JOHN E. Boron, a

citizen of the United States, residing in car for effecting the opening of a main valve, and to permit the car or some other part of the elevator mechanism moving therewith to effect the closing of the said valve to stop the carf A still further objectof the invention is the provision of means carried on the ele vator car for effecting the opening and closing of the main valve to any desired degree after the car has started, the operation being governed by the movement of the car.

In automatically operated hydraulic elevators, it is customary to employ a floor controller or selective device geared to the elevator car or other moving parts thereof, and to provide in conjunction with a floor controller an electric push button system,

whereby, whenever a push button in the car or at any of the floor landings is operated, the valve whichcontrols the flow of fluid to and from the hoisting cylinder will be automatically operated at a predetermined point in the travel of the car, in order to bring the car. to rest at the corresponding floor landing. In this operation it is neces sary to commence the movement of the valve before the car reaches the floor landing at which it is desired to stop. The distance, however, through which the car travels in being brought to rest, when the valve is operated at a given speed, varies with the load and speed of the car, so that with the controlling apparatus usually employed, it is impossible to bring the car uniformly to rest at the desired floor landing with the varying conditions of load and speed of the car found in actual practice.

Another object of this invention is to overcome this defect and bring the car uniformly to rest at any desiredfioor landing,

Specification of Letters Patent.

Patented Nov. 28, 1916.

Serial No. 753,232.

irrespective of load conditions and speed of the car at the commencement of operation of the valve. This object I attain by providing means for changing the points of contacts on the floor controller in proportion to the opening of the valve.

Other objects 'of the invention, and the exact nature thereof will appear hereinafter.

In the accompanying drawings, which illustrate a construction embodying the present invention, Figure 1 is a diagrammatic illustration of a push button plunger hydraulic elevator system showing the elec trical circuits, and mechanism controlled thereby; Fig. 2 is a front elevational view of the floor controller; Fig. 3 is an end view of Fig. 2; Fig. dis a side view of Fig. 1, showing a manually operative means for controlling the main valve; Fig. 5 is a modification of Fig. l, and shows a car switch system of electrical control.

Referring .to the drawings, an elevator car C is carried on a plunger G, adapted to travel in a plunger cylinder B. The control of'liquid to and from the cylinder is effected by means of a main valve V, which as herein shown, is of a well known con struction. This valve comprises a valve cylinder 1, in which is adapted to reciprocate a piston valve 2. This valve 2, when in a central position, as shown, cuts off the fiow of liquid between the cylinder B and the pressure and exhaust pipes P and E, respectively. If the piston valve 2 is moved downwardly, the pressure pipe P is connected through the to-and-from pipe K, to the cylinder B, supplying pressure beneath the plunger G'to lift the car. If the piston valve 2 is moved above central position, the cylinder B is connected with the exhaust E, permitting the car to descend by gravity, the weight of the car and plunger forcing the liquid outfrom the cylinder B through the exhaust. The piston valve 2 is operated by means of a rack bar 3, in mesh with a pinion 4, rigidly connected with a wheel or sheave 5.

An endless rope or cable 6 is driven by a small worm geared traction machine T to control the movements of the main valve V. The machine T comprises a small shunt wound motor M, which drives a sheave 7 through the worm and ear connection I. The. eleatromagnetic brace mechanism tacts 9,

is of a well known type, and operates to apply or release the brake to or from a wheel F. An endless rope or cable 6 makes one or two turns around. the sheave 7 and passes around the sheaves and 8, the latter being mounted on an overhead beam. The speed of the motor M may be controlled from the car by means of a manually operable controller L comprising a series of conconnected to section of resistance 10, which is in series in the circuit of the shunt field winding S. The resistance is controlled by the manual lever J. The machine T is carried by the car, and may be located in any suitable place.

The floor controller A. is substantially like that disclosed in U. S. Patent No. 783,174: issued on February 21, 1905, to E. R. Carichotf, for system of electrical control, and is connected in such a manner to the valve operating mechanism, that the contact points such as 11 or 12, etc, may be changed in proportion to the opening of the valve V, to make the car stop at the same place, no matter what position the valve sheave 5 might be in at the time it is desired to have the car come to a stop. The floor controller A comprises a rocking member 13, and a stationary member 11. The rocking member 13 is pivotally supported on shaft 15, and is provided with a se mental gear 16, positioned to mesh with a worm 17. A bevel gear 18 is carried on a shaft 4 and engages with a bevel gear 19, which in turn rotates the worm 17 through a sprocket and chain connection 20. The worm 17 is suitably journaled in the stationary member 14;;

The rocking membe 13, carries a right hand series of contacts 11, and a left hand series of contacts 12. The left hand contacts are operated in succession during the upward travel of the car to control the stoppingof the car, and the right hand contacts control the stopping of the car in like manner during its descent. An endless sprocket chain 21 is connected at 22 to the elevator car and runs over an upper sprocket wheel. 23, idler sprocket wheel 2%, sprocket wheel 25 and around an idler sprocket wheel 24:. A pinion 26 is mounted on a shaft 27 with the sprocket wheel 25 and rotates the shaft 15, which carries arms 28, 29, etc., each provided with rollers 30, 31, etc, which move the arms 32, 33, etc. The arms 32, 33, etc., carry contact members 8%, 35, etc, and are operated to etl ect the stopping of the car in a well known manner.

\Vhen the elevator car is at rest, the parts will assume the relative positions shown in Fig. 1. If current is now supplied to the motor M, and the electromagnet D orU, as hereinafter described, the brake mechanism will operate to allow the mot-or to start. The motor will operate to rotate the sheave 7 through the worm and gearconnection I,

thereby moving the valve 2, either up or down, depending upon the direction in which the motor M is rotated. Fluid will be admitted to the plunger cylinder B to move the plunger and car, say upwardly for example, and the speed of the same will be in proportion to the opening of the valve 2. As the car starts to move upwardly, the sheave '7 will begin to pull the cable to open the valve 2, until the speed of the car is equal to the peripheral speed of the sheave. So long as the peripheral speed of the sheave and the speed of the car remain substantially the same, the speed of the car will remain constant, but if the speed of the car starts to exceed the peripheral speed of the sheave, it will start to close the valve, or vice versa, if the car slows down. To stop the car, the current is cut oil from the motor M and brake magnet, as the car approaches the desired floor landing and the brake mechanism operates to stop the worm gear traction machine T, upon which the continuedmovement of the car transmits motion through the cable 6 to the valve mechanism, and moves the valve to central position, thereby cutting of]? the flow of liquid between the main valve and plunger cylinder, so that the car is brought to rest. As the peripheral speed of the wheel 5 is equal to the speed of the car when the motor ll is at rest, the valve V will be moved to central position at a speed directly proportional to that of the car, and the latter will therefore be brought to rest in a given distance of travel, which will be the same whether the car is moving slowly or at a high rate of speed, when the worm gear machine T is stopped.

W hen the sheave 5 is operated to efiect a movement of the valve, it transmits motion through the gears 18 and 19, and the sprocket chain connection, to rock the floor controller, in proportion to the opening of the valve, thereby changing the position of the series of cont- acts 11 and 12, etc., and the mechanism operative therewith, with respect to the arms 28, etc., the idea being to rock the floor controller in proportion to the movement of the main "'alve, so that it is operative to effect a movement of the valve at a predetermined point in the travel of the car, in order to bring the car to rest at the desired floor landing, no matter what position the valve sheave might be in at the time the car is desired to come to a stop.

The electrical controlling apparatus and circuits will now be described. This apparatus as shown is designed for an elevator operating between three floors. The apparatus comprises the floor cont-roller A already referred to, a series of floor magnets 36 and 37, a differentially wound magnet 0, comprising coils 38 and 39, a car safety switch 40, car push-button switches a, Q and a, floor landing push buttons a, b and a, reversing switch magnets U and D, reversing switches R and R. The circuits and controlling devices are shown in the position assumed when the car is at rest at the second floor landing. Current is supplied from any suitable source through the positive and negative mains designated and respectively. If a person at the third floor, for example, desires to bring the car up to said floor, the push button 0' is operated and establishes a controlling circuit which may be traced from the positive main, through a line switch H, conductor 41, contacts 42, conductor 43, door contacts 44, conductor 45, safety switch 40, conductor 46, car gate contact 47, conductor 48, coils 39 and 38 of the magnet 0, contacts 49, conductor 50, hall push button 0 which has been operated.

conductor 51, floor magnet 37, conductor 52, switch of the floor controller, conductor 53, reversing switch up-magnet U, and conductors 54 and 55 to the negative main. This circuit therefore includes the coils 38 and 39 of the magent 0. the floor magnet 37, and the up-magnet U, for the reversing switch R. As the magnet coils 38 and 39 are wound in opposition to each other, the magnet O is not energized suiiiciently 'to open the contacts 49, while the current is confined to the circuit just traced. The floor magnet 37, I

however, closesthe contacts 56 and establishes a circuit in parallel to the magnet coil 38 which circuit may be traced from the junction 57, throrwh a resistance 58, conductor net 0 may operate to open the contacts 49 which serves to prevent any interference at the floor landing push buttons, as the circuit for the latter remains open until the magnet 0 has again been deenergized. As the magnet U is energized the contact plate 60 is lifted into engagement with the contacts 61, 62 and 63, thereby establishing a circuit for the motor M, the field coil S and the brake magnet X. The circuit for the motor is as follows: through the conductor 41, contacts 64', conductor 66, armature brush 67, through the armature to the brush 68, conductor 69, through the lower switch contacts of the reversing switch R and conductor to the negative main. The circuit through brake magnet X, conductor 74 to the junctlon 7 The brake magnet now receives current and will operate to release the braking power from the wheel F and allows the worm gear machine T to start up. The sheave 7 is now rotated in a clockwise direction to cause a downward movement of the valve 2 so that liquid under pressure is admitted through the pipe P. valve cylinder 1 and pipe K to the plunger cylinder. and operates in the usual way to lift the car. As the car starts to move upwardly, the sheave will continue to pull the cable to open the valve, until the speed of the car is equal to the peripheral speed of the sheave, and so long as the relative speeds are maintained, the car will run at its maximum speed, but if the speed of the car starts to exceed the peripheral speed of the traction sheave, it will start to close the valve, or vice versa, if the car slows down. The speed of the shunt field motor may be controlled from the car by moving the lever J to the ri ht. thereby inserting the resistance 10 in series with the shunt field winding,

As the sheave 5 is rotated to effect a movement of the valve downwardly, it will trans mit a motion through the bevel gears 18 and 19, etc., to rock the floor controller A to the left. the floor controller rocking on the shaft 15. We will now say for example the valve is opened full, and the car is running at its maximum speed, the floor controller will. be rocked to the left in proportion to the opening of the valve, and as the car approaches the floor landing corresponding to the push button 0, which has been operated, the contacts 35 are automatically opened, thereby opening'the controlling circuit through the floor magnet 37, magnet O, and reversing switch U. These magnets being deenergized the switches controlled thereby are restored to their initial positions, and the current supply cut off from the motor M and winding of the brake mechanism X. The brake will now be applied and the machine T will come to a stop, and the continued movement of the car will eifect a movement of the valve to its central position. As the floor controller A is geared to and acts in unison with the car, and in accordance with the extent of opening of the main valve, the switch 35 of the floor controller is opened at a predetermined point in the car travel, which is variable, and depends upon the speed of the car. The point at which the contacts 35 are opened, and the machine T stopped. is

ductor 45, switch40, conduct-or 46, contact conductor 50, push button a, conductor 79,

47, conductor 48, winding 39 of magnet O, magnet 40, conductor 76, push button 0, conductor 51, floor magnet 37, conductor 52, contacts 35, conductor 53, magnet U, conductors 54 and 55 to the negative main. The magnet 1O being energized closes the contacts 77 and establishes a holding circuit, which circuit is the one just traced up to and through the magnet 40, contacts 77, to the negative main. As this latter holding circuit can normally be opened only at one of the hatchway door contacts 44 or the safety switch 40, in the car, the control of the car through the operation of any of the floor landing switches is prevented until the car has stopped and the hatchway door opened to restore the magnets O and 37 and the hatchway door again closed.

If it is desired to bring the car from the position shown to a lower floor, the push button a for example is operated, which establishes a circuit through conductor 11, contacts 42, conductor 43, contacts 44, con ductor 45, car switch 40, conductor 46, contact 47, conductor 48, magnet 0, contacts 49,

floor magnet 35-, contacts 80, conductor 81, reversing switch magnet D, and conductors 54; and 55 to the negative main. The magnet D now being energized, the reversing switch R is operated to establish a circuit through the motor M, and the winding of the electro-magnetic brake mechanism X as before, except that the direction of the current through the motor armature is reversed in a well known manner. The brake magnet will now release the brake mechanism, and the motor will therefore operate in a reverse direction, and effect the upward movement of the valve 21, so that the plunger cylinder is connected with the exhaust E, permitting the car to descend. As the car nears the first floor the contacts 80 of the floor controller are automatically opened, thereby cutting the circuit off from the motor M, and denergizing the brake magnet, which will operate to stop the machine T. The stopping of the machine T and the continued movement of the car downwardly, will effect the downward movement of the valve to central position to block the exhaust port and bring the car to rest.

The electrical system of control above described has been somewhat in detail for the purpose of giving a complete understanding of the operation of the invention. It will be apparent however, that the invention is adapted for use in various other systems of electrical control, both for direct and alternating current.

Referring now to Fig. 4, it shows a manually operated clutch mechanism H associated with the traction sheave 7. The clutch mechanism comprises a member 82 keyed to the shaft 7 of the traction machine. The

traction sheave runs free on the shaft 7 and has a member 83 integral therewith which engages with the member 82 to retate the sheave 7, being normally held into engagement with the said member 82 by means of a spring 8%, secured at one end to a manually operative lever 85. f for any reason the elevator car fails to move after the machine T has been operated to effect a movement of the valve, as for example, in case of an overload, the motor M would keep on running to effect the opening of the valve, but by operating the lever 85, it disengages the member 83 from the member 82, and the cable 6 maybe operated manually to close the valve. It will readily be seen that by moving the lever 85 a manual operation of the valve may be had at any desired time.

Referring now to the modification shown in Fig. 5, it shows my invention applied to car switch system of electrical control. This system comprises the car C carried on the plunger G, adapted to travel in the cylinder B. The machine T is carried on the car C and is operative in a manner heretofore fully described for effecting the movement of the valve mechanism V. The details and arrangement of parts of the valve mechanism V, etc, are exactly the same as heretofore described. The machine T is controlled by a manually operative switch TV operable to reverse the current through the motor and to control the speed of the same. The switch comprises a lever 86, carrying contacts 87 and 88 thereon. The contacts S7 and 88 engage with stationary contacts 89, 90, and 112 when the lever is moved to the right, and the contacts 91, 92, and 113 when moved to the left. The contact strip 88 also engages with the series of contacts 93 and 9%, which are connected to resistances 95 and 96 respectively. The system of electric circuits will now be described: If it is desired to run the car upwardly, the lever 86 is moved to the right. A circuit will be established for the motor, shunt field coil, and the brake magnet as follows: from the conductor 97, contact strips 88 and 90, conductors 101 and 102, brush 6?, and through the armature to brush 68, conductors 103 and 10%. to contact strips 89 and 87, conductor 10 5 to the negative main; the shunt field coil circuit branches from the contact strip 88, which engages the first contact of the series, 91, through conductors 106 and 107, through the winding S, conductor 108, to the negative main. The brake circuit branches from the conductor 97 at the junction 98, conductor 109, brake magnet X, conductor 110, to the negative main. The brake mechanism will now operate to release the brake power from the wheel F and the machine Will operate to rotate the sheave in a clockwise direction to cause a downward movement of the valve, so that the fluid v under pressure will be admitted to the plunger cylinder 3, to start the car moving upwardly. The speed of the motor may be controlled by moving the lever 86 to the right, which will insert a corresponding amount of resistance into the shunt field. circuit, whereby the machine may be controlled to run at any desired speed. After the motor has started up it will control the movement of the main valve in proportion to the speed of the car, in a manner heretofore fully described. lVhen it is desired to stop the car, the lever 86 is brought to its central or off position, which cuts off the current from the motor, shunt field and brake magnet. The brake magnet now being deenergized, operates the brake mechanism to stop the machine T, and the contin ued movement of the car will move the valve back to center position at a speed proportional to that of the car. To run the car down, the lever is moved to the left, and current is directed through the armature in a direction to rotate the sheave 7 in a counter-clockwise direction to effect the upward movement of the valve, and thereby connect the exhaust pipe E with the plunger cylinder, to direct the flow of fluid to permit the car to descend. The shunt field and brake mechanism are controlled in a manner before described when operating the lever to the left. The main valve is automatically closed at the upper and lower limits of the cars travel, by the latter striking against the stop buttons 98 and 99 on the rope 6, and moving the rope in one direction or the o-the in a manner to close the valve.

It will be understood that the principles of my invention may be embodied in many specific forms of apparatus other than herein set forth, and also that various changes in details of construction and arrangement of parts could be made without departing from the spirit and scope of the invention. I wish therefore not to be limited to the particular features of construction herein disclosed.

hat I claim as new and desire to secure by Letters Patent of the United States is:

1. In a hydraulic elevator, the combination of a car, a hydraulic motor, a controlling valve therefor, and motor means carried on the car and connected to the valve operable automatically to control the car throughout its entire travel.

2. In a hydraulic elevator, the combination of a car, a hydraulic motor, a control ling valve therefor, and electro-responsive means carried on the car and connected to the valve to control the car in accordance with its speed.

In a hydraulic elevator, the combination of a car, a hydraulic motor, a valve, and an automatically controlled electro-responsive means carried on the car and connected to the valve operable to control the car in accordance with its speed.

I. In a hydraulic elevator, the combination of the car, the valve, a rotary power unit carried by the car and connected to the valve dependent on the joint action of its speed and the car speed for its operation to control t 1e speed of the car.

In a hydraulic elevator, the combination of the car a h draulic motor a valve therefor, and motor means carried by the car and connected to the valve dependent on the joint action of its speed and the car speed for its operation automatically to control the speed of the car.

6. In a hydraulic elevator, the combina tion of the car, the valve, motor means carried by the car and connected to the valve operable automatically to effect the opening of the valve.

7. In a hydraulic elevator, the combination of the car, the valve, means carried by the car and connected to the valve operable automatically to open the valve until the speed of the car and the initial rate of valve opening substantially balance each other.

8. In a hydraulic elevator, the combination of the car, the valve, a rotary power unit carried by the car and connected to the valve operable to move the valve toward open position when the speed of the car is below the speed of the power unit.

9. In a hydraulic elevator, the combination of the car, a hydraulic motor, a valve therefor, and a motor device carried by the car and connected to the valve, operable automatically to move the valve to the open position when the speed of the car is below the speed of the motor device.

10. In a hydraulic elevator the combination of the car, a hydraulic motor, a valve therefor, a valve sheave, a traction sheave and means for driving the same, carried by the car, and a flexible connection between the valve sheave and traction sheave operable to effect the movement of the valve to open position until the speed of the car and traction sheave are in synchronism with each other.

11. In a hydraulic elevator, the combination of the car, a hydraulic motor, a valve therefor, and valve moving means comprising a motor carried by the car and connected with the valve to move the same to a closing position when the speed of the car exceeds the speed of the valve moving means. 12-. In a hydraulic elevator, the combination of the car, a hydraulic motor, a valve therefor, and valve moving means comprising a motor carried by the car and connected to the valve operable automatically to move the valve to closing position when the speed of the car exceeds the speed of the valve moving means.

13. In a hydraulic elevator, the combination of the car, a hydraulic motor, a valve therefor, a valve sheave, a traction sheave and means for driving the same carried by the car, and a flexible connection between the valve sheave and traction sheave, operable automatically to effect the movement of the valve to closing position when the speed of the car exceeds the speed of the traction sheave.

l-l. In a hydraulic elevator, the combination of the car, a hydraulic motor, a main three-Way valve, and electric means to open said valve at a rate dependent upon the speed of the car.

l5. In a hydraulic elevator, the combination of the car, a hydraulic motor, a main valve therefor, and electric means carried by the car and connected to the valve operable to open said valve at a rate dependent upon the speed of the car.

16. In a hydraulic elevator, the combination of the car, a hydraulic motor, a' valve, means carried by the car comprising an electric motor connected to the valve operable to open said valve at a rate dependent upon the speed of the car, and means to control the speed of said electric motor.

17. In a hydraulic elevator, the combination of a car, a hydraulic motor, a main valve, electric means carried by the car and connected to the valve operable to effect the initial opening of the valve, and to effect an opening and closing of the same in proportion to the speed of the car.

18. In a hydraulic elevator, the combination of car, a hydraulic motor, a main valve, means carried by the car and connected to the valve comprising an electric motor, operable to effect the initial opening of the main valve, and to effect an opening and closing of the valve in proportion to the speed of the car, and a manually operative switch to control the speed of said electric motor.

19. In a hydraulic elevator, the combination of a car, a hydraulic motor, a main valve, electric means carried by the car connected to and controlling the main valve, and automatic means to control the first named means in accordance With the speed of the car.

52'. In a hydraulic elevator, the combination of a car, a hydraulic motor, a valve therefor, means connected to said valve and carried on the car comprising an electric motor, a system of electrical circuits for said electric motor,v and automatic means for controlling said circuits to effect the control of said "valve throughout the entire travel of the car.

21. In a hydraulic elevator, the combination of a car. a hydraulic motor, a valve therefor, means carried on the car connected to and controlling the valve, means to control the said means, comprising a push button system of electrical circuits, an automatic floor controller therefor, and means for adjusting the floor controller.

22. In a hydraulic elevator, the combination of a car, a hydraulic motor, a valve therefor, means carried on the car connected to and controlling the valve, a push button system of electrical circuits for controlling the said means, automatic mechanism for controlling said circuits to effect the control of said valve, and means for adjusting said automatic means in proportion to the movements of the valve.

23. In a hydraulic elevator, the combination of a car, a hydraulic motor, a valve therefor, an electro-responsive means carried on the car and connected to the valve operable to ellect the movement of the valve to open position, automatic mechanism and :1V system of electrical circuits cont-rolled thereby, for controlling the electro-responsive means and means for adjusting the automatic mechanism in proportion to the movements of the valve to effect the movement of the valve to closed position at a predetermined point in the cars travel.

2%. In a hydraulic elevator, the combination of a car, a hydraulic motor, a valve therefor, means carried on the car and con nected to the valve operable to effect the movement of the valve to open position, means to control the said means comprising a push button system of electrical control and an automatic floor controller therefor, means for gearing the fioor controller to be moved in proportion to the valve move ments, to effect the movement of the valve to closed position at a predetermined point in the cars travel and in proportion to the speed of said car.

25. In a hydraulic elevator, the combination of a car, a hydraulic motor, a valve therefor, means carried by the car and connected to the valve'operable to move the valve to open position, an automatic floor controller and a push button system of electrical circuits for controlling the said means, a driving connection between the car and said floor controller, and means to adjust the floor controller in proportion to the movements of the valve, to effect a movement of the valve to closed position at a predetermined point in the cars travel, and in proportion to the speed of the car.

26. In hydraulic elevator, the combination of a car, a hydraulic motor, avalve there-for, a valve sheave, av traction sheave and a motor for driving the same carried by the car, a yielding connection between said valve sheave and traction sheave, automatic means to control the starting, stopping and reversal of said motor, comprising a push button system of electrical circuits and a floor controller therefor, a driving connection between said floor controller and the car, means for adjusting the floor controller in proportion to the movement of the valve, and means to regulate the speed of the said electric motor.

27. In a hydraulic elevator, the combination of a car, a hydraulic motor, a valve therefor, valve operating means carried on the car comprising an electric motor, a traction sheave, gearing therebetween, an electromagnetic brake mechanism therefor, a connection between said valve and sheave, automatic means to control the electric motor and brake mechanism, and a manually operative switch to regulate the speed of said electric motor.

28. In an elevator, the combination of a car, a hydraulic means for operating the car, a valve therefor, an electro-respol'isive device carried by the car, an operative connection between the electro-responsive device and valve, a source of current supply, a push button system of electrical circuits for directing the current to the electroresponsive device to effect the operation of the latter to move the valve to an opening position, an automatic floor controller, a driving connection between the floor controller and the car, means for adjusting the automatic controller in proportion to the movements of the valve, to effect the stopping of the electro-responsive device at a predetermined point in the cars travel, whereby the movement of the car will efieot a movement of the valve to its closed position.

29. In an elevator system, the combination with a car, a power mechanism for operating the car, a controlling device for said power mechanism, a master controller carried by the car, a yielding connection between the controlling device and master controller,an automatic floor controller adj ustable by the movements of the said controlling device, a system of electrical circuits for said master controller, a driving conmotion between the automatic floor controller and the car, and a manually operative means to control the master controller.

30. In a hydraulic elevator, the combination with the car, a hydraulic motor, a valve, means carried by the car and connected to the valve, operable automatically to control the valve in accordance with the car speed, and a manually operable means for controlling the first named means.

31. In an elevator, the combination with the car, a hydraulic motor, a valve therefor, a valve sheave, valve operating means carried by the car comprising a motor and sheave yieldingly connected to the valve sheave, a system of electrical circuits to control the said valve operating means, and means for automatically eifecting the movement of the valve to closed position at predetermined points in the cars travel.

32. In an elevator, the combination with the car, a hydraulic motor, a controlling valve therefor, a valve sheave, Valve operating means carried by the car comprising a motor and traction sheave, a cable operatively connecting the valve sheave and traction sheave, a source of current supply, a system of electrical circuits, operative to direct the current to the said valve operating means to operate same to effect a movement of the valve to open position, and also to regulate the speed of the said motor.

In a hydraulic elevator the combination of a car, hydraulic means for operating the car,.a valve, an electro-responsive device carried by the car, yielding connections between the valve and the electro-responsive device, a source of current supply, a system of electrical circuits and a car switch operable to direct the current to the electro-responsive device, to allow same to operate to effect a movement of the valve to open position, and to cut off the current supply to effect the stopping of the said device where by the movement of the car will efl"e :t a movement of the valve to its closed position in proportion to the speed of the car.

34;. In a hydraulic elevator, the combination with a car, hydraulic means for operating the car, a main valve, operating means carried on the car and connected to the valve, comprising a motor, a source of current supply, a manual switch operable to direct the current supply to the valve operating means to operate the same to effect the movement of the valve in a position to allow the car to run either up or down, and means for controlling the speed of said motor.

35. In an automatic push button system of electrical control for hydraulic elevators the combination of a car, a controlling valve, motor operated means carried by the car connected automatically to control the main valve, and means associated with the first named means, whereby a manual operation of the said valve may be effected independent of the said push button system.

36. In an elevator, the combination with the car, of a main motor, a pilot auxiliary motor, means comprising a push button system of circuits for controlling the auxiliary motor, and means operated by the joint action of the main and auxiliary motors for controlling the speed of the car.

37. In an elevator, the combination with the car, of a main motor, a pilot motor, means comprising a push button system of electrical circuits and an automatic floor controller for controlling the auxiliary motor, and means operated by the joint action of the main and auxiliary motors for controlling the said main motor.

38. In an elevator, the combination with the car, of a main motor, a pilot motor de pendent on the joint action of its speed and the car speed for its operation to control the car speed, and means for controlling the pilot motor comprising a push button system of electrical circuits and an automatic floor controller adjustable in accordance with the car speed.

39. In an elevator, the combination with the car, of a hydraulic motor, a pilot motor, means comprisin a push button system of electrical circuits and an automatic floor controller for controlling the pilot motor, and means operated by the joint action of the speeds of the car and pilot motor for controlling the car speed.

40. In an elevator, the combination with the car, of a hydraulic motor, a pilot motor, means comprising a push button system of electrical circuits and an automatically adjustable floor controller for controlling the pilot motor, and a valve operated by the joint action of the speeds of the car and pilot motor for controlling the hydraulic motor.

41. In an elevator, the combination With the car, of a hydraulic motor, a pilot motor, a valve operated by the joint action of the speeds of the car and pilot motor for controlling the hydraulic motor, a push button system of electrical circuits for controlling the pilot motor, and an automatic floor controller adjustable in accordance with the valve movements, for controlling the said circuits.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing Witnesses.

' JOHN E. BOYCE.

Vitnesses:

J. G. BETHELL, In. L. GALE, Jr.

Copies of this patent may be obtained for five cents each, by addressing the Commissionezaof Patents, Washington, D. C.

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