US1218711A - Elevator. - Google Patents

Description

J. J. SPROUL.

ELEVATOR.

APPLICATION FILED IAY I. 1916.

4 SHEETS--S HEET I.

w 5 zziz rm: mwms Psrsns c0 PNOTG-LITNO WASHING mu. 0 c.

J. J.- SPROUL.

ELEVATOR.

APPLICATION FILED MAY 1, I916.

Patented Mar. 13, 1917.

4 SHEETS-SHEET 2.

1.1. SPROUL.

ELEVATOR.

APPLICATION FILED MAY 11 I916.

Patented Mar. 13, 1917.

4 SHEETSSHEET 3.

Hll Mwms PETERS 40,. PNDHLLITHOY.WASNINUMN 1, c.

Patented Mar, 13, 1917.

4 SHEETS-SHEET 4- J. J. SPROUL.

ELEVATOR.

APPLICATION FILED MAY 1. BIG.

Ulf llTED STATES PATENT OFFICE.

JOHN J. SPROUL, O1 NEX I YORK, I A.STII\ GS-UP"I 1L1 TO AUGUST SUNDTEI, OF iJDElGI' l', NE YORK.

ELEVATOR.

Application filed May 1, 1916. Serial No. 94,578

To all whom it may concern ie it known that 1, JOHN J. Sriiouri, a citizen of the United States, and resident of New York, in the county Of New York and State of New York, have invented a certain new and useful Flevator, of which the following is a specification.

My invention relates to elevators of the type in which a motor operated by non- COIl'lPl'GSSllJlG fluid is employed to drive the elevator car, and more particularly the invention involves a motor d'iven by oil or other non-comp. sible fluid under steam pressure. Preferably, a reciprocating motor is comiected to and arranged to rotate a drum for driving the elevator car by means of hoisting cable The steam which applies pressure to the non-compressible fluid may be derived directly from a steam generating plant in the building, or from an outside source of steam supply.

An object of the invention is to provide an elevator mr-ticularly adapted for high buildings and which will have a high elli ciency, and which will be simple, safe and practical for driving the elevator by steam pressure appli d directly to non-compressible fluid wl 'ch drives the motor for lit ing the car. The arrangement dispenses with the power transforming elements including origin s, electric generators, and electric motors, or pumps, usually interposed between the steam gen" tor and the motor for driving the elevator car, as in hydraulic clc vators, wherein a steam pump is ei'uployed for returning the Fluid to the pressure tank, or as in ele ""ic elevators, wherein a steam engine and an electric generator are employed for generating current for the mo cem nts transforms the loss 0:? elliciency.

The invention also secures the advantages of an overhead motor connected directly to the hoisting drum and adapted to rotate the same, and provides for the use of a motor which is compara ively small, compact and light in weight, and therefore well adapted f r overhead use.

During the travel of the elevator car from the bottom to the top of its run, or vice versa, the motor makes a certain number of revolutions, and a corresponding amount of the non-compressible fluid which actuates the power at a great Specification of Letters Patent.

L which drives the elevator, each of which 7 Patented Mar. 13, 191 *7.

cause it lubricates the engine, packings can be dispensed with in the engine, and the ellicieucy is greater and the life of the en gine longer than when water is used therein. I employ a column of water however between the steam and oil to avoid heating of the oil and also to prevent oil from being drawn back with the water condensed iron the steam, to the steam boiler.

I am familiar with, and have had espericnce in installing and operating elevator systems known as hydro-steam elevators, in which a piston or a plunge is operated in a *ylinder and driven by fluid controlled by steam in a pressure tank. The present invention is an improvement on such systems, because it can be used to great advantage .in very high buildings, since a rotary element is employed to drive the elevator. As th steam is cond ici'ed from the generating of the building, the present system can be usec where it would not be possible to use the old style or hydro-steam elevator.

In the present system, 1 prefer to have he cables on the drum tree and operated 3y frictional contact with the drum. This is an advantage in that the drum does not need to be so large as would be required if the cables were fastened to the drum. I prefor L0 use a multiple cylinder engine, al-

though some other rotary engine might be used. A multiple cylinder engine has a large fact 1 of safety, as each cylinder forms a safety device, and there is hardly a possibility of all the cylinders breaking at one time. Also the multiple cylinder engine is you well adapted to operate as a pump while the elevator car is descending, so that it operates as a safety device and controller during both the ascent and descent of the car.

In practising the inventioin the elevator car may be driven by an overhead motor of the type above mentioned, which is connected directly to a hoisting sheave to drive the car by means of cables running fron the car over the sheave and connected to counterweights. Steam under pressure may be supplied from a generator in the basement of the building or other convenient location. the steam being conveyed to an overhead tank to supply pressure to water therein. Said tank communicates with a second pressure tank containing oil or the like for driving the motor. The steam pressure when admitted to the water tank transmitted through the water to the oil pressure tank forcing the oil therein through the rotary motor to drive the same. The oil which circulates through the motor is conducted therefrom to a reservoir which may be open to atmospheric pressure. The motor is driven by the oil in a direction to lift the car.

The car may be lowered by its own weight the motor being driven thereby in the reverse direction, and acting as a pump to circulate the oil through the motor in the reverse direction, whereby the oil is returned to the pressure tank. A friction brake may be connected to the motor shaft and may be operated to a released position by steam pressure. The supply of steam pressure to the water pressure tank, the circulation of the oil through the motor and the supply of steam to the brake, may be controlled by magnetically operated valves electrically controlled from the car.

Other features and advantages of the invention will appear hereinafter.

Referring to the accompanying drawings which illustrate an elevator system embodying the principles of my invention, Figure l is a part sectional elevation showing the elevator as installed in a building. Fi 2 is a, front sectional elevation of the motor. Fin".

is a sectional side elevation of the same. Fig. 4 1s a part sectional elevation of the brake and operating means therefor. Fig. 5 is an elevation view of the water pressure tank the valve controlling tne supply of steam pressure thereto, and the electromagnets for operating the valve the valve being shown in section. 6 is a diagrammatic view of the electric circuits and the various controlling magnets. Fig. '3 is a sectional plan view of the set of valves controlling the circulation of liquid through the motor. the view being taken at the section line 7 7, on Fig. 9. Fig. 8 is a part sectional elevation of the same the section being at the line 8-8 on Fig. 9. Fig. 9 is an elevation of the same looking in a direction at right angles to that of. Fig. 8. 10 is a sectional elevation at the line 10-10., of Fig. 7.

Referring particularly to Fig. l, the elievator car 2 is driver by a motor B, having a shaft ll on which is mounted a hoisting sheave 12, over which run hoisting cables 13, connected at one end to the car and at the other end to a counterweight l t. The car counterweight travel between vertical 5 and lb respectively. A fricma be mounted directly on the drive shaft 11. The motor 3 may be driven by forcing a non-compressilile liquid 17 preferably oil, to circulate through the motor, pressure being i ireferably supplied by steam.

A furnace 18, in basement of ing or other convenient location,

the build generates steam which is conveyed from the boiler 19, 0

through a pressure pipe 20 leading upward through the vfloors 2i, E23 of the building 0 a pressure tank D v-rh'ch contains a nonompressibl-e fluid, preferably water. lhe n1 plv of steam. underpressure to the tank D is controlled by a valve actuated. by electromagnets and re, as will appear more fully hereinafter.

fin oil pressure tank F communicates with the tank D through a connecting pipe 25 i t .nks. The tank F is fil 9 the bottom of the a led with oil and water the water remaining in the lower part of the tank, owing to its specific gravity being greater than that of the oil. l vhen the car A is at the lower end of its sha t, the level of the water in the tank is areierably just above tiie connecting pipe to prevent oil from running into the water tank D and rising through the water. When steam pressure is admitted to the tank D the water therein is forced through the pipe 25 into the tank F, the oil in the tank l being forced through a pressure pipe 2?) leading through a valve chest G to the motor it through which the oil circulates, thereby driving the motor to litt the car. The oil is conveyed from the motor through an exhaust pipe which also leads through'tlie valve chest G to a reservoir 28. To lower the car the supply of steam pressure is cut off, permitting the car to descend by gravity thereby rotating the motor B in the reverse direction which also reverses the circulation. of the oil tierein. In other words, as the car descends the oil 17 runs from the reservoir 28 through the motor, being pumped by the motor back into the oil tank F, the oil as it enters said tank. forcing the wafer back into the tank D.

During the descent of the car the valve lt is in position 0 ct off the steam pressure supply and open the tank to an exhaust pipe 29 which leads to condensing chanr ber 30. the latter contains a condensing co1l 31, through i hich may circulate water from a main 32. The coil 31 may serve as a heating coil from which water may be drawn through pipes 33 and 34.- leading to the hot water taps 35 at the dillerent floors of the building. These taps 35 as well as cold water taps connected directly to the main 32, may be mounted at sinks 37.

The upper level of the water in the pressure tank D may be controlled by an overflow tank 38. A portion of the steam as it comes in contact with the water in the tank D is condensed and as the water reaches the level of a pipe 39 near the top of the tank it runs therethreugh into an overflow tank 38. The water as it rises in the overflow tank, hits a float 10 and raises a valve all, thereby opening the tank to a drain pipe 412 leading downward to a tank 13. The latter may be connected through a pipe 41 with the condensing chamber 30 to carry off the water that condenses in the latter. From the reservoir 1-8 the water may be pumped back into the steam boiler by a pump 45 driven by a motor 16. Thus very little water is wasted.

The valve mechanism for controlling the supply of steam to the pressure tank D will now be described Referring particularly to Fig. 5, the electromagnets 47 and 48 for actuating the valve, may be conveniently mounted on the tank D. The magnet 47 comprises a core 17 connected through a link 1-9 to an arm 50 secured to a rock shaft 51. The core 18 of the magnet 48 is in like manner connected to said rock shaft. An arm 553 fixed to the rock shaft 51 is connected through a link 53 to a valve piston 5-1 which is vertically slidable in the cylindrical valve casing The pressure and exhaust pipes 20 and communicate with the va ve chamber 56 respectively below and above the valve section 57. With the parts in their normal position of rest as shown in Fig. 5, which position is assumed when the car at rest, communication of the tank D with both the pressure and exhaust is cut oil by the valve s ction 57 which blocks the pipe 58 lead' 5 pm t 1e valve chamber to the tank. If

it is desired to supply pressure to the tank D, the electromagnet is energized, causing its core 17 to be drawn inward, thereby rocking the shar t 51 and swingin the arm upward A dotted line position, thereby lifting the valve section 57 into position to open the port 58 and block the exhaust pipe 29. The pressure pipe 20 is thus placed in conn'nunication with the pipe 5-8, admitting steam under pressure to the tank D. In order to open the tank D to the exhaust pipe 29, the magnet 18 is energized so that its rawn downward rocking the to the upper core 18 is o. shaft 51 and carrying the arm 02 downward to the lower dotted line position, thus moving the valve section 57 down to block the pressure pipe 20 and. open the pipe 58 to the exhaust pipe 29. hen the operated magnet is again deenergized, a centering spring 60 operating on an arm 61 depending from the rock shaft 51, returns the pa to their normal position of rest. The valve mechanism which directly controls the circulation of the oil through the motor and thereby regulates the speed of the motor will now be described.

This mechanism is shown in detail in Figs. 7, S, and 10. For the purpose of illl'lstration the i ve chest F is shown as containir" four verti val disposed valves 61, ($2, 63, and 6". The oil for drivingthe motor flows from the pressure pipe 26 into a pres-- sure chamber (35, (Fi 10) and from thence through one or more oi the valve chambi-u's (36 into pressure chzuuber 7 from which leads a pressure i. to the il'lOtOl. The return pipe 69 from the motor leads to a chamber 0 which may be connected through one or more of the valve chambers (36 to a chamber 27" which opens into the return pipe 27. lit should be noted that the valves (31, 62, 63, and 6 1, which may be identical in construction, are in parallel relation, each controlling a passage between the pressure chambers 65 and 67, and each also controlling a passage between the exhaust chambers and 27.

The valves 61, 6'2, 63, and 61 are operated respectively by electromagnets 71, 7 2, 73 and 7 When the magnets are deenergized the valves more doii' nward by gravity to their normal closed position shown in Fig. 10. With the valves in this position, it will be seen that communication between the pressure pipes 65 and 67 is cut oil, also between the exhaust chambers 70 and 27. Circulation of the oil through the motor is thus prevented. If an electromagnet, Fig. 10, is energized, the connected valve 61 is drawn upward from the Fig. 10 position to tile Fi 8 position, so that communication is established from the pressure chamber to the chamber 67, whereby a How of oil to the motor is permitted. At the same time the exhaust chamber 70 is opened to the xhaust chamber 27, permitting the return ilow of the oil from the motor. The speed of the motor is governed by the number of open valves. The magnets 71 to 7 -'l-, for operating the valves are controller. as hereiuaiter pointed out.

The rotary motor B may be of the construction disclosed in the patent to A. Sundh, 1,159,613, or 01 other approved construction. F or a detailed description of the motor, reference may be had to said patent. Briefly, the motor comprises a vertical casting mounted on a bed plate 7 6, said casting containing a plurality of symmetrically disposed cylindrical bores 77, each of which may be lined with a bushing 78. lVithin each of said bores is located an oscillating disk 79. Each disk is provided with a cychambers 87, there being one chamber 86 and one chamber S? for each dist: 0. Each disk is provided with a port or passage 88 which may be brought into COilllllllXllCiltion with. av pressure chamber 87, and a passa e r port 89 which may be brought into communication with an eXiai chamber 80. When a piston at the outer limit of its movement (as he uppermost piston in Fig. 2,) both the ports 88 and 89 are closed. itssumii'iq th crank to he ro ting in a counter ClO-L' use dircct'on lg. it will. be seen that the pistons (n tie ght ham side are being drawn inwarl and that the ports 89 n'ovide an open passage from the pressure chamber 86 to the piston nders, so i is admitted to tle ylinders to drive them inward. lt vvil also be seen that the exhaust ports 88 ar closed. During the outward movement or the pistons, the oressure ports are closed and the exhaust ports 88 are open. thus a continuous circulation through the motor while the i nin g. As the motor is run in the reverse rection "While the car is going down, t ie on:- culation of the oil through the motor is reversed. The terms and exiaust have been applied tor convenience to var ous chan'ibers and pipes, but will be urderstood that these are merely elative terms and also that their use assumes that the motor is being driven in a certain direction.

The brake mechanism C comprises a pair of brz ke shoes 00 adapted to bear on a brake pulley 91 keyed to the shaft 11. The brake shoes are pivotally mounted on brake levers 92 connector by pivots 93 to a standard 9%. Toggle links 95 connect the brake levers to a piston rod 96 and piston 07 which Works in a cylinder 98. The brake shoes are normally :a imlied by the power of a spring 99 which bears di'nvuwardly on the piston 07. The brake shoes are lifted by steam pressure admitted to the cylinder 98 beneath the piston, through a port 100 controlled by a valve 101, said valve being actuated by an electromagnet 102. When the magnet 102 is energized and the valve 101 thereby littec, steam pressure is admitted through a pipe 103, Fig. 1, through the port 100 and lifts the piston 97 to release the brake shoes.

The various electromagnets are actuated from a controller in the car comprising a controlling lever 10 i. Current is supplied from anv suitable source, through positive and neg ive mains 106 and 10'? connected to the controlling circuits through a switch 105. It the controlling lever is moved to the right from a central position, it establishes circuits through the magnets for 'ausing the motor to drive the 'z r upward. The lever first makes connection with a contact bar 108 and thereby e tablishes circuit for the electromagnet which may be the positive main 100 throuo'l 109, switch lever 10 i, contact i ll conductm conductor magnet 1-7, conductor 11.1, b rake controlling magnet 102, and conductor 112 to the ne tive main. Tie magnet t? being energized lifts the valve 7 i as already descr'bed to permit steam pressure to the tank D. The brake controlling magnet 102 at the same time permits steam pressure to the cylinder 98 to release the brake.

The motor 13 is still locked against rot tion on account oi? the bank of valves G being closed and preventing the circulation of the oil through the motor, but the continued movement oi? the controller lever to the right immediately brings a Contact 118 on said lever into engagement With a contact a, and then contacts 5, and o and (Z in succession thereby establishing circuits for the magnets '71, i3 and 7% respectivel When 11 5 conta with a, a circuit is completed through 001 ductor 109, contacts 11,

llet and agnet 71. The magnet 71 there- ;ore hits the valve (51 and permits a retricted lieu: of oil through the motor under the steam pressure transmitted through the Water and oil tanks D and F. The motor is thus started in a direction to lift the car but can only be run at slow speed owing to the restricti-:m of the oil through the pors oi the valve 61.

38 the magnets 72, 73, and 7 1 are successively energised when the contact 1.13 oncontacts o 0 (Z the valves 62 63 and r a. a a 7 7 7 1 l are successlvely opened permitting a correspondingly greater How of oil to the motor, thereby increasing its speed. llhen the controller lever is retur ed to central position the electron agnets controlled thereby are deenergised in the reverse order, permitting the valves to return to normal position. The supply of oil to the motor is thus gradi'ially cut oil and then the supply of steam pressure to the tank l) and to the brake cylinder 97, is also cut oil causing the b 'ake to be applied by its spring 90.

When the controller lever is thrown to the loft tr in central position, it first engages a contact 115 thereby establishing a circuit through conductor 109, lever 10%, contact 115, conductor 110, electromagnet -18, brake controlling magnet 102, and conductor 112.

The magnet 48 moves the piston of the valve E downward, thereby opening the tank D to the exhaust pipe 29. The continued movement of the controller lever to the left completes circuits for the magnets 71, 72, 73 ant 74 through contacts a, 7), o, rZ,-said ma ets tans being operated to open their va ves 61. 1'32, 63, 6st, whereby the oil is permitted to circulate through the motor. The brare 11153 now been lifted, and. the car, due to its weight, starts downward. The motor being drive.-

the car, acts as a pump to draw the oil from the tank and returns it to the oil tank F, the oil in the tank F in turn forcing the water back into the tank D.

The speed of the car is controlled during both its ascent and descent, by the position of the controller lever which determines how many of the alves G1, 62, 63, and 6-1 shall be open at any time.

Although for the purpose of illustration, I have shown the system arranged to show a single elevator car, it will be understood that where a bank of elevators is installed, a. common steam gei'ierating plant for all the elevators may be employed, an d also a common discharge tank may be used for all the.

elevators.

It will be seen that the various valves for controlling the steam and the circulation of the liquid for driving the motor are balanced. T hat is, in any valve chamber, the upward and downward pressures of the fluid on the vertically movable valve therein, are equal. The inner faces of the valve chambers are also provided with annular recesses 120 opposite their ports whereby lateral pressure on the valves is avoided.

By the t rms hydraulic motor or hydraulic engine is meant a motor or engine operable by the circulation therethrough of a liquid r non-compressible fluid such as oil or otl'ier lubricating liquid.

Variations may be resorted to without departing from the spirit and scope of my invention and portions of the invention may be used without others.

lVhat I claim is 1. In a hydro-steam elevator system, the combination with a car and an engine to drive the car, means to supply steam under pressure providing driving power for the engine, and two columns of fluid, consisting respectively of column of water and a. column .ubrica ting fluid, both interposed between and the engine, said column of uizl con'nn uni eating with the engine, and said water column interposed beeen the steam-and lubricating fluid to \lrive the latter through the engine.

2. In a hydro-steam elevator system, the combination with a car and an engine to drive the car, means to supply steam pressure, a lubricating fluid actuated by the steam pressure and circulated through the engine to drive it, and a water column interposed between the steam and said fluid.

3. In a hydro-steam elevator system, the combination of an elevator car, an engine at upper end of the elevator shaft arranged to drive and control the car, said engine having inlet and discharge ports, receptacles communicating respectively with the inlet and discharge ports, liquid for driving the motor, said engine operable by said liquid circulating therethrough from one receptacle to the other, a steam generating plant, a riser through which steam is conveyed for applying pressure to the liquid in one receptacle to cause the liquid to drive the motor.

l. In a hydro-steam elevator system a steam generating plant, an elevator car, a hydraulic motor in an elevated position, on ranged to drive the car, liquid to drive the motor, receptacles for said liquid adjacent the upper end of the elevator shaft, a riser from the steam generator through which steam is conveyed upward to the liquid in one receptacle and by which the liquid is forced through the motor to the other receptacle and thereby caused to drive the motor, and means to exhaust the steam.

5. In a hydro-steam elevator system, the combination with a car, of an engine operable to drive the car, said engine having an inlet port and a discharge port, conduits communicating respectively with said ports for conveying a fluid to and from the en gine, and valve mechanism comprising a series of valves each controlling a passage in both said conduits, and means to operate said valves seriaze' m.

6. In.a hydro-steam elevator system, the combination of a car, a motor operable by a fluid circulating theretln'ough to drive the car, inlet and discharge ports for the motor, conduits leading from said inlet and dis charge ports respectively for the passage of an operating fluid, valve mechanism controlling the flow of fluid through both said conduits, means to supply steam under pressure for operating said fluid an exhaust port for the steam, and valves controlling both the steam pressure and exhaust ports.

7. In a hydro-steam elevator system, the combination with an elevator shaft, of an engine at the upper end of said shaft, said engine having a rotary drive shaft, an ele vator car, a drum connected to the drive shaft, hoisting cables connecting the car and drum, means to supply steam pressure, a lubricating fluid actuated by the steam pressure to drive the engine, and means cooperating with the engine to complete a circulating system for the fluid b} which the fluid is all retained at about the evel of the upper end of the elevator shaft.

8. In a hydro-steam elevator system, a hyraulic engine having a rotary driye shaft, a car, means whereby the car is driven from aid shaft, steam actuated brake mechanism, valve mechanism to control the supply and exhaust steam to and from the brake mechanism, valve mechanism operable to control the flow of liquid through the engine to thereby control the starting and stopping of the engine, a controlling lever, and electro-responsive means actuated thereby to concomitantly control said valve mechanisms.

9. In a hydro-steam elevator, the combination of a car, a motor to drive the car, the motor having inlet and exhaust ports, a noncompressible lubricatin fluid by which the motor is driven, a receptacle to contain said fluid and from which the latter is conveyed through said inlet port to the motor, means to supply steam pressure to the fluid in said receptacle, and a pressure transmitting medium through which. the steam pressure is applied to said fluid and by which the steam is prevented 'lron'i entering the receptacle, and a receptacle which the tluid is conveyed from the motor through said exhaust port.

10. In a hydro-steam elevator, the combination of a car, a hydraulic motor comprising a rotary element connected to drive the car, a non-compressible lubricating Fluid, a pressure tank containing said fluid for operating said motor, means for supplying steam under pressure and transmitting said pressure to said noncompressihle fluid and driving it through the motor to operate the motor, said transmitting means comprising a liquid interposed between the steam and said lubricating fluid, and a receptacle separate from the pressure tank, containing said liquid.

11. In a hydro-steam elevator, the combination of a car, a counter-weight, a motor having an inlet and an outlet port and comprising a rotary drive shaft, a drum on said shaft suspending said car and counterweight, a non-compressible fluid for operating said motor, an open tank communicating with the outlet port, a closed tank containing said fluid and communicating with the inlet port and means for supplying steam under pres sure and transmitting said pressure to said non-compressible fluid in the closed tank and driving said fluid through the motor into the open tank and thereby operating the motor.

12. In a hydro-steam elevator, the combination of a hydraulic motor having a plurality of cylinders, pistons in said cylinders, a drive shaft connected "ith said pistons, a drum attached directly to said drive-shaft, a car and a counterweight, cables suspending said car and counterweight from the drum, a liquid for operating the pistons in the cylinders and causing the pistons to rotate the drum, and means for supplying steam under pressure and transmitting said pressure to the liquid in the cylinders.

13. In a hydro-steam elevator, the combination of a car, a motor comprising a rotary element connected to drive the car, a noncompressible lubricati g liuid for operating said motor, a pressure tank containing said fluid, means for supplyingsteam under pre sure, a compartment separate from said tank, and water in said compartment forming a medium for transmitting said pressure to said non-compressible fluid.

ll. in a hydrosteam elevator, the combination of a car, a motor comprising a rotary element connected to drive the car, a noncompressible lubricating fluid circulating through the motor for operating it, m ans for supplying steam undur pressure, and a water column between the said lubricating fluid and the seam, through which said pressure is transmitted to said luln'icating fluid.

15. in a hydro-steam elemtor, the comb.i--

nation of a car, a counterweight, a motor for driving said car and counterweight, coinprising a plurality oi cylind pistons working in said cylinders, a rotary element, a non-compressible lubricating fluid for op erating the pistons in said cylinders, and causing the pistons to drive the rotary element, and means for confining steam under pressure and transmitting said pressure to said non-compressible fluid in the cylinders, said transmitting means comprising a *ater column between said non-compressible lubrieating fluid and the steam.

16. In a hydro-steam elevator, the combination of a car and amotor having a rotary drive shaft to drive the car, a non-compressible lubricating fluid for operating said motor, means for confining steam under pressure to drive said fluid, a water column between said non-compressible fluid and the steam, and means to contain said non-compressible fluid arranged at a higher level than said water column.

17. In a hydro-steam elevator, the combination or a car, a rotary element for transmitting power for driving said car, a multiple piston engine arranged to drive said rotary element, a non-compressible fluid for operating said engine, means to supply steam under pressure for keeping said noncomg iressible fluid under pressure and driving it through the engine to operate said engine, and a receptacle arranged to receive the fluid discharged from the engine atter driving it.

18. In a hydro-steam elevator, the combination of a rotary element, a car and coun tel-Weight suspended from said rotary ele ment, a multiple piston engine for driving said rotary element in one direction to move the car in one direction, means to supply a n iii-compressible fluid to said engine, means to supply steam pressure for keeping said non-compressible fluid under pressure to op-- erate the engine, said engine being driven in the opposite direction independently of power supplied thereto by said fluids.

19. In a hydro-steam elevator, the combination of a rotary element, a car and a counterweight suspended from said element, a motor comprising a rotary drive shaft connected directly to drive said element, cylinders extending radially from the axis of the drive shaft and pistons reciprocating in the cylinders, said element and shaft being rotatable by the weight of the car as the latter descends, and a non-eonmressible fluid actuated by stean'i pressure to drive said motor for raising the car, said fluid circulating through the motor while the car descends, and means to control said circulation and thereby control the speed of motor and car as the car descends.

20. In a hydro-steam ele ator, the combination of a rotary element, a car and coun- "erweight suspended from said element, a motor comprising a rotary drive shaft connected to drive said element, said element and shaft being rotatable as the car descends, by a load including the car itself, and a noncompressible lubricating fluid actuated by steam under pressure for driving said motor and thereby rotating said rotary element in the opposite direction and raising the car, and a water column interposed between said non-compressible fluid and the steam.

21. In a hydro-steam elevator, the combination of a rotary element, a car and counterweight suspended from said element, a motor comprising a rotary drive shaft connected to drive said element, said element and shaft being rotatable as the car descends, by a load including the car itself, and a noncompressible lubricating fluid actuated by steam under pressure for circulating said fluid through the motor and thereby driving said motor and rotating said rotary element in the opposite direction and raising the car, and tanks into which the liquid is conveyed from the motor respectively during the ascent and descent of the car, and means to control the rotary element from the car.

In an elevator, the combination of a rotary element, a car and counterweight suspended from said element, a motor to drive said element, said rotary element being rotatable as the car descends by a load including the car itself, and a non-compressible lubricating fluid actuated by steam under pres sure for circulating said fluid through the motor and thereby driving the motor in the opposite direction and raising the car, tanks into which the liquid is conveyed from the motor respectively during the ascent and descent of the car, valve mechanism for controlling said non-compressible lubricating fluid and the steam pressure, and manually operative means in the car for controlling said valve mechanism.

23. In an elevator, the combination of a rotary element, a car and counterweight suspended therefrom, a motor having a drive shaft connected to said element, lubricating liquid, means to supply steam under pressure to drive said liquid and cause the latter to drive the motor, valve mechanism controlling the supply of steam, separate valve mechanism controlling the circulation of said liquid and thereby controlling the speed of the motor, and electro-responsive means for controlling said valve mechanism.

24-. In an elevator, the combination of a rotary element, a car and a counterweight suspended therefrom, a motor having a drive shaft connected to said element, and radially reciprocating pistons, means to supply steam under pressure, a fluid actuated by said pressure and operable to drive said motor and cause it to lift the car, said lluid con trolling the motor during the descent of the car, valve mechanism arranged to concomitantly control said fluid and steam, and. means in the elevator car for controlling said valve mechanism.

25. In an elevator, the combination of a rotary element, a car and counterweight suspended therefrom, a motor having a drive shaft connected to said element, said motor operative to lift the car and concomitantly lower the counterweight, means to supply steam under pressure, oil driven by the steam to actuate said motor in a direction to lift the car and lower the counterweight, a water column interposed between the steam and oil and means to control the circulation of oil and thereby control the rotation of the motor during the descent of the car and the ascent of the counterweight.

26. In an elevator, the combination of a rotary element, an engine connected to drive and control said element, a car and counter weight suspended from said element, ports for said engine, a pressure TGSQIVOlI connected with one port, a liquid in said reservoir, an open tank connected with the other port, means to supply steam under pressure to said liquid for forcing the liquid through the engine to thereby drive the engine, the liquid being discharged from the engine into the open tank, the engine being operative when driven by said liquid, to rotate the retary element in direction to raise the car and lower the counterweight.

27. In an elevator, the combination of a rotary element, an engine connected to drive and control said element, a car and a counterweight suspended from said element, ports for said engine, a pressure reservoir connected with one port, a liquid in said reservoir, an open tank connected with the other port, means to supply steam under pressure to said liquid for forcing the liquid through the engine to thereby drive the engine, the liquid being discharged from the engine into the open tank, the engine being operative when driven by said liquid, to retate the rotary element in a direction to raise the car and lower the counterweight, means to cut oil the supply of steam from said liquid, and means to connect the pressure tank with an exhaust, thereby permitting the rotary element to be driven by a load including the elevator car and drive the engine, and cause the latter to draw the fluid from the open tank and return it into the pressure reservoir as the car descends.

In an elevator, the combination of an engine comprising a plurality of cylinders and pistons working in the cylinders, a shaft connected with said pistons. a traction sheave on said shaft, cables running on said sheave, a car and a counterweight suspended by the cables, a liquid under pressure for actuating said pistons, means to supply steam under pressure for applying pressure to said liquid, and means to control said liquidjand steam pressure, and thereby cause the elevator and counterweight to be raised and lowered by said engine.

29. In an elevator, the combination of a multiple cylinder engine comprising pistons reciprocating in the cylinders, an engine shaft connected to said pistons, a traction sheave on said shaft, an elevator car and counterweight suspended from said traction sheave and driven thereby, a liquid to drive said engine, a pressure tank containing said liquid, means to supply steam under pressure and apply said pressure to said liquid in the tank and cause it to circulate through the engine and drive the engine, and valve mechanism interposed between the engine and said tank and controlling the rate of flow of the liquid to the engine, thereby controlling the speed of the engine.

30. In an elevator, the combination of a multiple cylinder engine comprising pistons reciprocating in the cylinders, an engine shaft connected to said pistons, a traction sheave on said shaft, an elevator car and counterweight suspended from said. traction sheave and driven thereby, a liquid to drive said engine, ports to admit and discharge said liquid to and from said. cylinders, a pressure tank connected with one of said ports, an open tank connected with the other port, means to supply steam under pressure to saidpressure tank to apply pressure to said liquid, and means to control the admission of steam pressure to the liquid and the circulation of the liquid for actuating the engine to raise the elevator car and to control the descent of the car.

31. In a hydro-steam elevator, the com.- bination of a car, a motor having a rotary drive shaft connected to drive the car, a. liquid for operatii'ig said motor, means for supplying steam under pressure for keeping said liquid under pressure to operate said motor, valve mechanism controlling the How of said liquid to the motor to thereby control the speed of the motor, separate valve mechanism controlling the supply of steam pressure to said liquid, and electromagnetic means to actuate the valve mechanisms.

In a hydro-steam elevator, the combination of a car, a motor having a rotary driveshaft connected to drive the car, a liquid for operating said motor, means for supplying steam under pressure for keeping said liquid under pressure to operate said motor, valve mechanism controlling the flow of said liquid to the motor to thereby control the speed of the motor, separate valve mechanism controlling the supply of steam pressure to said liquid, and electroiinignetic means to actuate the valve mechanism, and a manually operated switch in the elevator car for controlling said electromagnetic means.

In an elevator, the combination of a car, an oil driven motor connected to drive the car, means to contain oil for driving the motor, means to supply steam under pressure to apply pressure to the oil, and a pressure transmitting medium consisting of a liquid heavier than oil interposed between. the steam and the oil.

8%. In an elevator, the combination of a car, an oil driven motor connected to drive the car, means to contain oil for driving the motor, means to supply steam under pressure to apply pressure to the oil, and a liquid heavier than the oil. arranged to prevent the steam from coming in direct contact with V the oil.

In an elevator system, the combination of a multiple cylinder engine, a shaft for said engine, said engine comprising pis tons in said cylinders and connected to said shaft, inlet and outlet ports for said cylinders, and a fluid adapted to be circulated through said cylinders to drive the engine in one direction and to control the running of the engine in the other direction, said fluid being actuated by steam pressure while driving the engine, a traction sheave on the engine shaft, and an elevator car and a counterweight suspended from said traction sheave and operated thereby.

36. In an elevator system, the combina tion of an engine, a traction sheave operated thereby, an elevator car and a counterweight suspended from said sheave, a steam gener ating plant, a pressure tank for the engine, containing oil adapted to circulate through and drive the engine, a pressure tank containing water communicating With the oil tank, means for conveying steam from the generating plant to said water pressure tank, and valve mechanism for controlling the supply of s cam and the circulation of said oil.

37. In an elevator system, the combination oi a multiple cylinder engine comprising pistons in the cylinders, a shaft to which the pistons are connected, a traction sheave on said shaft, an elevator car and counterweight suspeiulcd from said sheave, a liquid 0 ierr-ible unde' pressure to actuate said engine and drive said car and counte weight, a tank containing said liquid and communicating with the engine, and means to supply steam under pressure to said tank, an exhaust tank into which the liquid is exhausted from the engine and from which the engine operable to pump the liquid back into the pressure tank, and means to regulate the return flow of liquid and thereby control. the speed of the motor.

38. In an elevator, the combination oi a car, a counterweight, a traction sheave, an engine for driving said sheave, sail, engine having inlet and discharge ports, containers, oil therein, said containers opening respectively to said. inlet and exhaust ports, means to supply steam under pressure for actrating said oil and causing it to drive the engine and rotate the traction sheave, and thereby drive the car and counterweight.

In an elevator, the combination of a car, a counterweight, a traction sheave, an engine for driving said sneave, said engine having inlet and discharge ports, containers, oil therein, said containers opening respec tively to said inlet and discharge port, means to supply steam under pressure, and transmit said pressure to the oil in one of aid containers, and thereby cause the oil to circulate hrough the engine and drive it in a direc on to lift the car.

40. In an elevator, the combination of an elevator c r, a counterweight, a traction sheave from which said car and counter weight are suspended, an engine driving said traction sheave, ports on said engine forming inlet and discharge, and means to contain a in 'icating fluid connected to each of said po steam pressure for obtaining pressure on the fluid in one of said means, and thereby circulating the fluid through. the e mine and driving the engine and cause the elevator to be raised, n'icans to cut oil. said steam pressure,

and means to connect said last mentioned container with an exhaust to relieve the steam pressure from the oil lubricating fluid and thereby cause the elevator car to descend.

a l. In an elevator, the combination of a traction sheave, a car and counterweight suspended from said sheave, an engine for driving said sheave, said engine including a plurality of cylinders, two chambers, and ports individual to said cylinders and connecting each cylinder to both of said chamhers, containers for oil connected respectivc-ly to said chambers, means for supplying steam under pressure for controlling said oil and causing it to drive the engine in one direction, and means to cut oil said steam pressure and permit the engine to be driven in the opposite direction by a load including the elevator car.

42. In an elevatm', the combination of a car, a counterweight, a traction sheave suspending said car and counterweight, an engine for driving said sheave, said engine having pressure and discharge ports, two pressure tanks connected in series with the PYGSSUITG port, and a discharge tank communicating with the discharge port, oil in one of said pressure tanks, the other containing water, and means for conducting steam under pressure to the water pressure tank.

43. In a hydro-steam elevator system, the combination of a traction sheave, a fluid motor for rotating said sheave, a car and a counterweight suspended from said sheave and operated thereby, means to lock the fluid in the motor and thereby control the motor, a brake for said motor, means to supply steam pressure for operating the brake, a valve to control said supply, and electroresponsive means to control the valve.

44. In a hydro-steam traction elevator sys tem, the combination of a fluid. engine, a traction sheave driven thereby, a car and a counter weight suspended from said sheave, a fluid, means to supply steam under pressure to said fluid for operating said engine in one direction, the engine being driven in-the opposite direction by a load including the car, means to break the engine by locking the fluid therein and a brake operated by steam pressure.

45. In a hydro-steam elevator system, the combination of a traction sheave, a fluid motor for operating said sheave, means for locking the fluid in the motor and thereby controlling the motor, a car and a counterweight suspended from said sheave and operated thereby, a steam operated brake for said motor, means to supply steam for operating the brake, valve mechanism controlling the supply of steam to the brake, and electro-responsive means controlled from the car for controlling said val ve mechanism.

46. In a hydro-steam elevator system, the combination of a fluid motor and a traction sheave connected thereto and adapted to be rotated thereby, a car and a counterweight suspended from said traction sheave, valves arranged to lock the fluid in the motor and thereby control the motor, a steam operated brake for said motor, means to supply steam pressure to operate the brake, and electro responsive means to concomitantly control said steam pressure and said valves at will from the elevator car.

47. In a. hydro-steam elevator system, the combination of a traction sheave, a fluid motor for rotating said sheave, motor-controlling valves to lock fluidin the motor, a car and a counterweight suspended from said sheave and operated thereby, a brake for said motor, a spring for applying the brake while the motor is at rest, means operated by steam for releasing the brake, and electromagnetically operated valve mechanism to control the supply oi steam to said releasing means, and. thereby control the brake.

4-8. In a hydro-steam elevator system, the combination of a traction sheave, a iiuid motor for rotating said sheave, a car and a counterweight suspended from said sheave and operated thereby, a. brake for said sheave means to operate aid brake by steam, and an electro-responsive device for controlling said brake.

4-9. in a hydro-steam elevator system, the combination of a traction sheave, a fluid motor for rotating said sheave, a car and a counterweight suspended from said sheave and operated thereby, a brake for said motor, means to operate said brake by a fluid, an electro-responsive device for controlling said fluid, and a manually operated switch in the car for controlling said electro-responsive device.

50. In a hydro-steam elevator system, the combination of a traction sheave, a fluid motor for rotatin said sheave, a car and a counterweight suspended from said sheave and operated thereby, a brake for said motor, brake applying means including a cylinder, and a piston in said cylinder, means to supply fluid under pressure to the cylinder for operating said piston, a valve for controlling said fluid, an electro-responsivc device for operating said valve, and a man- .ually operated circuit closer in circuit with said electroresponsive device for controlling it.

51. In a hydro-steam elevator system, the combination of a traction sheave, a fluid engine for rotating said sheave, a car and a counterweight suspended from said sheave and operated thereby, a lubricating fluid for driving the engine, ports for said fluid to enter the engine and discharge therefrom, means to supply steam under pressure for actuating said fluid, a brake, and a controller operable to control said fluid, said steam, and said brake.

In a hydro-steam elevator system, the combination of a traction sheave, a fluid motor for rotating said sheave, a car and a counterweight suspended from said sheave and operated thereby, a bi: he for said motor, oil to drive the motor, means to supply steam under pressure for circulating said oil and thereby driving the motor in one direction, means to control said steam ann said oil, mechanism actuated by steam pres sure for operating the brake, and means for controlling the steam pressure to the brake operating mechanism in conjunction with the first mentioned controlling means.

53. In a hydro-steam elevator system, the

combination of an elevator car and counterweight, an oil engine, a traction sheave rotatable thereby and suspending said car and counterweight, oil to drive the engine, means to supply steam under pressure for circulating the oil to thereby drive the engine, ar I plurality of valves for controlling the circulation of the oil, a valve controlling the steam, electromagnets to operate said valves, and a manually operated electric switch in the car to effect the operation of the electro magnets and thereby cause a concomitant operation of said valves.

In a hydro-steam elevator, the combination with a car and a motor to drive the car, said motor operable by the circulation of oil therethrough, of an oil pressure tank, a water pressu e tank, a pressure pipe leading from the upper portion of the oil tank to the motor, a pipe connecting said tanks and opening into the tanks near the bottoms thereof, and a steam pipe opening into the water tank at the upper portion thereof whereby steam under pressure admitted through the steam pipe to water in the water tank may force the water through said connecting pipe into the oil tank and force oil from the oil tank through said pressure pipe to the motor and thereby drive the motor.

553. In a hydro-s cam elevator, the comb-ination with a car and a motor to drive he car, said motor operable by the cireulatimi oi oi] therethr r'flgh, oi' an oil pre re tank, a water pressure tank, a pre sure pipe leading from the mpg-er portion of the oil tank to the motor, a pipe connecting said tanks and opening into the tanks ne: the bottom thereof, and a steam pipe opening into the water tank at the upper portion thereof \vherel'ry steam and admitted through the steam p l to water in the water ank may force the water through said connecting pipe into the oil tank and force oil from the oil tank. through said pressure pipe to the motor and thereb dri the motor in. one direction, a reservoir for the oil d" charged from the motor, and a disehar pipe leading from the motor to said r voir, the motor operable when runmng the reverse direction to return the oil and water to their pressure tanks.

56. In a hydro-steam elevator combination of a car, a motor to din car, said motor operable by circulation oi oil therctln'ough, the motor having a sub per stantially constant oil capacity so that the volume of oil therein remains substantially constant throughout its run, an oil pressure tank containing oil to drive. the motor, means for conducting the oil from said tank to the motor, said tank being of acapacity to contain oil suflicient to drive the motor during a full run of the car from its lowest to its highest position, and a receptacle into which the oil is discharged during the run of the motor.

In a hydro-steam elevator, the combination of a car, a motor to drive the car, said motor operable by the circulation therethrough of oil under pressure, an oil pres sure tank, a water pressure tank, said tanks being substantially on a level, a pipe connccting said tanks near their lower ends, the oil tank arranged to contain Water in the bottom thereof, the level of the water being above said connecting pipe when the car is at the bottom of its run, said water in the. oil tank supporting oil thereon, the oil. tank being of snliicient capacity for the oil therein to run the motor and lift the car from the bottom to the top of its run, and means to supply steam under pressure to the water tank and force the Water therein through said connecting pipe into the oil tank and thereby drive the. oil through the motor for driving the latter.

58. In an elevator, the combination of a car, a motor connected. to drive the car, said motor operable by a liquid forced to circulate therethrough, a valve mechanism controlling the circulation of said liquid and comprising a plurality of valves in parallel relation in the circulating system, means to supply steam under pressure to apply during driving pressure to said liquid, a valve mechanism controlling the supply of steam, and valve. controlling means to operate said valve mechanism in succession and arranged to open said parallel valves scrim 21m.

59. In an elevator, the combination of a car, a motor connected to drive the car, said motor operable by a liquid forced to circulate thcretln-ough, valve mechanism CO11 trolling the circulation of said liquid and comprising a rdurality of valves in parallel relation in the circulating system, each of said valves controlling ports through which the liquid is conducted to the motor, and separate. ports through which the liquid is conducted from the motor, each valve permitting a. restricted [low toward and from the motor, and valve controlling mechanism for opening any desired number of the valves to thereby control the speed of the motor.

(30. In an elevator, the combination with a car, of a motor connected to drive the car, said motor operable by a liquid circulating therethrough, means forming with ,the motor, a circulating system for the liquid, valves in said system e'vternally of the motor andcontrolling the circulation of liquid through the motor, means to supply steam pressure to the liquid, a steam valve normally closed to cut off the supply of steam pressure while the motor is at rest, and a controller operable first to open the steam valve and then said first mentioned valves, whereby the steam pressure is applied to the liquid before the latter is permitted to circulate through the motor.

61. In an elevator, the combination with a car, of a motor connected to drive the car, said motor operable by a liquid. circulating therct-hrough, means forming with the motor, a circuhiting system for the liquid, valves in said system externally of the motor and controlling the circulation of liquid through the motor, means to supply steam pressure to the liquid, a steam valve normally closed to cut elf the supply of steam pressure while the motor is at rest, electromagnets for operating the valves, and a controller operative when moved from a normal position of rest, first to operate the magnet for the steam valve to admit pressure to the liquid, and then to operate the first mentioned valves successively to gradu ally open the circulating system.

62. In an elevator, the combination of a car, a motor connected to drive the car, an oil pressure tank to contain oil to drive the motor, a water pressure tank to contain water, said tanks being in communication to permit the water to displace the oil and drive the oil through the motor, means to supply steam under pressure to the water in the tank, an overflow pipe leading from the water tank, a trap to receive the overflow, and means operable automatically to discharge the water from said trap.

63. In an elevator, the combination of a car, a motor connected to drive the car, a lubricating fluid to drive the motor, a. pressure tank containing said fluid, a water tank communicating with said pressure tank, means to supply steam under pressure to said water tank, whereby the water under said. pressure may cause the lubricating fluid to drive the motor, an overflow chamber communicating with said water tank, a valve in said chamber, and a float arranged to operate said valve to discharge the water from said chamber.

64. In an elevator, the combination of a car, a motor connected to drive the car, said motor being operable by a. liquid under pressure, means to supply steam under pressure to the liquid, a valve controlling the supply of steam to the liquid, a brake for the motor operable by steam under pressure, means for conducting steam to the brake independently of said valve, and a valve controlling the supply of steam to the brake, and valve mechanism controlling the circulation of liquid through the motor and operable to lock the liquid in the motor thereby providing an additional brake for the motor.

65. In a l'iydro-steam elevator, the combination With a car, of a hydraulic motor having a rotary drive shaft, a drum and cables forming a driving COllYlGQt'lOl], bet on the motor and car, a non-compressible lubricating fluid to drive the motor, means to supply steam to apply pressure to said fluid, and a Water column forming a pressure transmitting medium interposed between the steam and said fluid.

In a hydro-steam elevator, the combination with a car, of. an overhead engine U having a drive shaft connected to drive the car, liquid operable by circulation tl'irough the engine to drive it, nuians forming with the engine an overhead circulating system for said liquid, a steam generating plant, and a riser through which steam is conveyed from said plant upward through the build ing to supply pressure to said liquid and thereby cause it to drive the engine.

(3'7. In an elevator system, the combination of a hydraulic motor having a rotatable shaft, a drum rotated by said shaft, a car, a counterweight, cables connecting said car and counterweight and suspending them from said drum, a steam generating plant, a riser from said steam generating plant to the engine, a fluid reservoir connected with said. riser, and also connected with an inlet port of the engine, and a receiving reservoir con nocted with a discharge port of the engine, and means to control the tluid and the steam, and cause said fluid to be driven trom the fluid reservoir through the engine to the receiving reservoir and thereby rotate the eugine.

G8. in an elevator system, the combination of a car, a hydraulic motor connected to drive the car, a fluid actuated by steam precsure to circulate through said motor and thereby drive it to lift the car, said car operable to drive the motor in the reverse direction and reverse the circulation Oil the fluid therethrough, two receptacles for said fluid, one receptacle arranged to receive the fluid from the motor when the car is driven by the steam pressure actuating the fluid, the other receptacle arranged to receive the fluid when the motor is driven by the car.

69. In an elevator system, the combination of a car, a hydraulic motor :lor driving said car, means suspending said car from said motor, fluid actuated by steam pressure to circulate through said motor and thereby drive it, two receptacles for said fluid, one receptacle arranged to receive the fluid discharged from the motor While the fluid is acing actuated by steam pressure in the other reservoir, and is driving the motor.

70. In an elevator system, the combina tion with a car and counterweight, of a hy draulic motor for driving said car and counterweight, a drum connected with said motor, cables suspending the car and counterweight from said drum, fluid actuated by steam pressure for driving said motor, tivo receptacles for said l'luid, one receptacle arranged to receive the fluid as it is discharged from the motor While the fluid is being actitiated to drive the motor by steam pressure apolied in the other receptacle.

71. In an elevator system, the combination of an elevator car, a hydraulic motor ha ring a rotatable shaft, a drum driven by said shaft, cables connecting the car with said drum, fluid actuated by steam pressure and thereby forced through the motor to drive the same, and a receptacle into which the fluid is discharged from the motor While the latter is being driven by said pressure.

72. in an elevator system, the combination of an elevator car, a hydraulic motor for driving said car, moans tor suspending said elevator car from said motor, a fluid actuated by steam pressure and thereby forced through the motor to drive it and lift the car, 1 ea us to relieve the fluid from tl steam pressure and cause the hydraulic notor to be driven by the car, and t'WO receptacles for the fluid, namely one reci-rptacle from which the fluid is forced through the engine by said steam pressure as the car ascends, the other receptacle arranged to receive the fluid as it is discharged from the engine during the ascent of the car.

73. in an elevator system, the combination of a car, a hydraulic motor for driving the car, means for suspending the car from the motor, a fluid actuated by steam pressure and thereby forced through the motor to drive it and lift the car, means t relieve the fluid from the steam pressure and cause the car to descend and drive the motor, and two receptacles for the fluid, the fluid being ceived by the u lot" from one receptacle and conveyed through the motor and delivered to the other receptacle during the descent ot the car.

74. In an elevator stem, the combination of an elevator car, a counterweight, a hraulic motor having a rotatable shaft, 2 drum driven by said shaft, cables suspending said elevator car and counterweight said drum, a fluid for driving the engine, means to supply steam pressure to said fluid and force it through the engine to drive the engine and lift the car, a receptacle to which the fluid is delivered as the car rises, said liquid being returned through the engine as the car descends by its Weight, a receptacle to Which the fluid is delivered from the motor as the car descends, and means to control the flow of fluid through the motor.

'75. lo an elevator system, the combination of a car, a counterweight, a hydraulic engine, a liquid for driving said engine, said engine having ports through each of which the liquid flows to and from the engine alternately as the engine is operated in opposite directions, cables connecting the car and counterweight and suspended from the engine, and a valve system comprising valves controlling said ports and having a normal rest position in which they cut off the flow of liquid at both ports whereby the fluid is controlled and locked in the engine between the ports, thereby holding the engine at rest.

76. In a hydro-steam elevator, the combination of an elevator car, a hydraulic motor, a 'rotatable drum connected to and driven by said motor, ropes suspending the car from said drum, said engine having in lot and discharge ports, valves at said ports, and valve controlling mechanism for simultaneously closing the valves atboth said ports and retaining them in closed position.

77. In a hydro-steam elevator system, the combination of a car, a counterweight, a hydraulic motor, fluid to drive the motor, a rotatable drum connected to and driven by the motor, ropes suspending the car and counterweight from the drum, said motor having inlet and discharge openings for the fluid, valves at said openings, and means for simultaneously actuating said valves to control the flow of fluid through said openings, thereby controlling the starting, running and stopping of the motor, said valves having a normal position of rest in which they close said openings and thereby lock the motor.

78. In a hydro-steam elevator system, the combination of a car, a counterweight, a hydraulic motor, fluid to drive the motor, a rotatable drum connected to and driven by the motor, ropes suspending the car and counterweight from the drum, said motor having inlet and discharge openings for the fluid, valves at said openings, and means for simultaneously actuating said valves to control the flow of fluid through said openings, thereby controlling the starting, running and stopping of the motor, said valves having a normal position of rest in which they close said openings and thereby lock the motor, said controlling means being located at the car and manually operable at will.

70. In a hydro-steam elevator system, the combination of a car, a counterweight, a hydraulic motor, fluid to drive the motor, a rotatable drum connected. to and driven by the motor, ropes suspending the car and counterweight from the drum, said. motor l'iaving inlet and discharge openings for the fluid, valves at said openings, means for sn'miltaneously actuating said valves to con trol the flow of fluid through said openings, thereby controlling the starting, running and stopping of the motor, said valves having normal rest positions in which they close said openings and thereby lock the motor, an electric control system controlling said valve actuating means, said system comprising a controller operable at will from the elevator car.

80. In a hydrosteam elevator system, the combination of a car, a counterweight, a hydraulic motor, a rotatable drum connected to and driven by the motor, ropes suspending the car and counterweight from the drum, a fluid for operating the motor, and means to supply pressure for actuating the fluid, the motor having inlet and discharge ports for the fluid, a system of valve control for simultaneously controlling the fluid at said ports, and a valve controlling system for controlling the steam.

81. In a hydro-steam elevator system, the combination of a car, a counterweight, a hydraulic motor, a rotatable drum connected to and driven by the motor, ropes suspending the car and counterweight from the drum, a fluid for operating the motor, means to supply pressure for actuating the fluid, the motor having inlet and discharge ports :lor the fluid, a system of alve con trol for simultaneously controlling the fluid at said ports, a valve controlling system arranged to control the steam, and means to simultaneously actuate the valves of both said controlling systems.

82. In a hydro-steam elevator system, the combination of a car, a counterweight, a hydraulic motor, a drum connected to and driven by said motor, ropes suspending the car and counterweight from the drum, a fluid for operating the motor, means to supply steam pressure for actuating said fluid to drive the motor in one direction, means to relieve the fluid from the steam pressure and cause the motor to be driven in the opposite direction by the weight of the car, said. engine having inlet and discharge ports for the passage of said fluid, and a valvecontrollin system for simultaneously controlling the fluid at both said ports for starting the motor, for driving the motor in both directions, and for stopping the motor.

83. In a hydro-steam elevator system, the combination of a car, a counterweight, a hydraulic engine, a drum driven thereby, ropes suspending the car and counterweight from said drum, a hatchway having guides for the car and counterweight, the engine being located in an elevated position rela tively to the car and counterweight, a steam generating plant in the basement, a fluid for operating the engine, a riser for conveying the steam under yn'essurc from said plant to the engine, the steam being operable to drive said fluid through the engine to operate it, and means to control the flow of said fluid and the supply of steam pressure thereto.

84. In an elevator system, the combination of a car, a counterweight, a hydraulic motor, a rotatable drum connected to be driven by the motor, ropes suspending the car and counterweight from thedrum, fluid for operating the motor, and means to supply pressure for actuating the fluid, the motor having inlet and discharge ports for the fluid, and valve mechanism for opening said ports in running the elevator, and for closing both said ports and holding them closed for stopping the elevator and holding it stationary.

85. In an elevator system, the combination of a car, a counterweight, a hydraulic motor, a rotatable drum driven by said motor, ropes suspending the car and counterweight from the drum, fluid for operating the motor, and means to supply pressure for actuating the fluid, the motor having inlet and discharge ports for the fluid, and valve mechanism for simultaneously opening said ports gradually during the acceleration of the motor for controlling the acceleration of the car.

86. In. an elevator system, the combination of a car, a counterweight, a hydraulic motor, a rotatable drum driven by the motor, ropes suspending the car and counterweight from the drum, fluid for operating the motor, and means to supply pressure for actuating the fluid, the motor having inlet and discharge ports for the fluid, and valve mechanism for simultaneously closing said ports gradually during the stopping of the motor for obtaining a smooth slowing down and stopping of the elevator.

87. In an elevator system, the combination of a car, a counterweight, a hydraulic motor, a rotatable drum connected to be driven by the motor, ropes suspending the car and counterweight from the drum, fluid for operating the motor, and means to supply pressure :tor actuating the fluid, the motor having inlet and discharge ports for the fluid, and valve mechanisn'i for simultaneously opening or closing said ports dillerent extents while the motor is running to thereby control the speed oi the car, and also control the stopping of the car entirely by the locking of the fluid in the motor.

Signed at Chicago, in the county oil Cook and State of Illinois this 26th day of April A. D. 1916.

JOHN J. SPROUL.

Uopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, T0. Q.

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