US752232A - Ho model - Google Patents

Description

No. 752,232.v PATENTED FEB. 16, 1904,

- J. P. LAJOIE.

FLUID PRESSURE MOTOR.

APPLICATION FILED MAR. 2a. 1903 no MODEL. 1 2SHEBTSSHEET 1.

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No. 752,232. 2 PATENTED FEB. 16, 1904; J. P. LAJOIE.

FLUID PRESSURE MOTOR.

V APPLICATION FILED MAR. 23. 1903. K0 MODEL. 2 SHEETS-SHEET 2 5 5 i 5 p 5 1 v a 5 i I Patented February 16, 1904.

UNITED STATES PATENT OFFIC JULES PAUL LAJOIE, OF PARIS, FRANCE.

FLUID- -PRESSURE MOTOR.

SPECIFICATION forming part of Letters Patent No. 752,232, dated February 16, 1904:.

Application filed March 23, 1903.

To all whom, it may concern.-

Be it known that I, JULEs PAUL LAJOIE, a citizen of the Republic of France, and a resident of Passage du Havre 31, Paris, France, have invented new and useful Improvements in Fluid-Pressure Motors, of which the follow ing is a specification.

This invention relates to anew or improved vertical motor adapted to be driven by means of gaseous carbon dioxid.

One form of the invention is illustrated, by way of example, in the annexed drawings, in which Figure 1 is an elevation of the motor, partly in section; Fig. 2, a cross-section on the line connecting-rods c c 0 c on one motor-shaft d.

Two of the cylinders 05 a receive the driving fluid at high pressure. The other two cylinders, which are of larger diameter, receive the expanded fluid from the cylinders a a, respectively. There are thus practically two distinct compound motors working on the same shaft. In each of these two compound motors the cranks belonging, respectively, to the high-pressure and low-pressure cylinders are at an angle of one hundred and eighty degrees to each otherthat is to say, lie in one plane which cuts the axis of the shaft (1. In order that the dead-point will be easily overcome, the cranks belonging to the respective motors are in planes which out each other perpendicularly. The entire system thus practically comprises two compound motors, the cranks of which are respectively at right angles to each other. The four cylinders are mounted on a cast-iron frame 9, supported by pedestals it, which serve as guides for the cross-heads of the piston-rods and are fixed to a bed-plate a, which carries the hearings j for the motor-shaft cl. The latter has at one end Serial No. 149,071- (No model.)

a fly-wheel k and can be provided at the other end with a pulley.

In each group of motorsthat is to say, in I each of the two compound motors-the distribution of the driving fluid is efiected by means of six valves, which are inclos'ed in identical boxes Zin vertical groups of three. The said boxes can be placed symmetrically to the right hand and left hand, respectively, of the plane containing the cylinder-axes, or the two groups of valves can be placed one above the other in the vertical plane passing through the axis of the crank-shaft, as shown in Fig. i. In the former case the valves are controlled by means of two rods m, which have guides at and 0 and each of which has at its upper end a triangular plate p in contact with the valve-spindles q and at its lower end an arm 7, carrying a roller 8, adapted to bear on a cam t, mounted on the shaft d. A spring 12 serves to hold the said roller in contact with the cam. In the second case only one cam-operated rod on is used, which operates the uppergroup of valves during its upward movement and the lower. group of valves during its downward movement. Since the valve-boxes are all identical with each other, it will be suflicient to describe one. Inside the box Z a seat a is provided, adapted to support the valve o. A spring m tends to hold the'latter continuously against the said seat. The spindle q of the said valve isadapted to slide in a stufling-box y and terminates in a rounded end, against which the triangular plate 19 bears. The fluid to be distributed enters at the port 2 concentric with the valve and passes out through the lateral port 1.

Fig. 6 diagrammatically represents the connection between the valves themselves and between the valves and the cylinders. In each group of three valves one box 18 or 15 receives the fluid supplied by the pipe 2. This box communicates with one end of the respective high-pressure cylinder. Another box 13 or 16 communicates with the corresponding. end of the low-pressure cylinder and with an exhaust-pipe 3, and the third box 14: or 17 communicates with the opposite ends of the two cylinders. Assuming the small piston to be at the lower end of its stroke, as shown in Fig.

6, the large piston will be at the upper end of its stroke, supply will be required below the small piston. For this purpose the valve of the box 18 must be open, the gas contained in the large cylinder must be exhausted into the atmosphere. The valve of the box 13 must therefore also be open and also the valve 14 of the box, in order to allow the fluid contained in the small cylinder to pass to the large cylinder. In the other group, the admission taking place at the lower end of the small cylinder, the valve of the box 15 will be closed. The exhaust taking place at the lower end of the large cylinder, the valve of the box 16 will be closed, and since the two cylinders communicate with each other at their upper parts the valve of the box 17 will be closed. It will thus be clearly seen that the distribution is effected by means of the alternate opening and closing of the valves of each group, the closing of one group coinciding withthe opening of the other. The reversing of the engine is therefore effected by reversing the opening and closing of the valves. For this purpose the cam has three projections 4 5 6, of which the two extreme ones are identical and have the same throw. The cam mounted against rotation on the shaft cl is adapted to slide on the latter between two stops 7 and 8 during its rota-.

tion, so as to present to the rollers s of the rods m projections 4 and 5 for rotation in one direction and projections 5 and 6 for rotation in the other direction. The cam can be displaced for this purpose by means of the rod 9, which is adapted to operate the bifurcated levers 10, which engage a collar 11, adapted to slide with slight friction in a circular groove formed in the cam.

This motor, which has been specially combined for use with carbon'dioxid, can obviously be worked by means of any other gaseous fluid.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed,

I declare that what I claim is A fluid-pressure motor of four cylinders arranged two and two and of which the cranks are crossed at right angles, comprising: six valves in each group of two cylinders, the said six valves being divided into two groups of three each, a triangular plate for each group of three valves arranged opposite the lower extremities of said valves and fixed to one of the extremities of a rod maintained axially by a guide in which it moves and the other end of said rod being provided with a roller, a spring located between the lower face of the axial guide for the rod and a support for the same, a cam provided with three projections for contacting with the rollers of the lower extremities of the rods of the two plates arranged opposite the lower extremities of the two groups of three valves for each group of two cylinders, the two extreme projections of the said cam being similar to the middle projection but keyed at an angle of one hundred and eighty degrees from the latter, the said cam with three projections being mounted upon the motor-shaft but movable axially thereon, an oscillating lever for each cam of which one of the extremities engages in an annular groove in said cam, a rod jointed at one of its extremities and within its length jointed with theother extremity of the oscillating levers of which the first extremity is engaged with the annular groove of the cam with the three corresponding projections.

In testimony whereof I have signed myname to this specification in the presence of two subscribing witnesses. V

J ULES PAUL LAJOIE.

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