US787692A

US787692A - Air-motor.

Info

Publication number: US787692A
Application number: US17287703A
Authority: US
Inventors: James Lowe Pilling
Original assignee: Individual
Current assignee: Individual
Priority date: 1903-09-12
Filing date: 1903-09-12
Publication date: 1905-04-18
Anticipated expiration: 1922-04-18

Description

No. 787,692. PATBNTED APR. 18, 1905.

J. L. PILLING.

AIR MOTOR.

APPLIOATION FILED SEPT. 12, 190s. v

' a SHEBTSQ'SHBET 1.

y PATBNTED APR. 18, 1905. .1. L. BILLING.

AIR MOTOR.

APPLIOATION FILED SEPT. 12. 1903.

3 SHEETS-SHEET 2,v

WITJVESSES l I 3% @y @maf/m 91iiarneys.

UNITED STAT-Es .Patented April 1s, 1905.

PATENT OFFICE.

AIR-MOTOR.

SPECIFICATION forming part of Letters Patent No. 787,692, dated April 18, 1905.

Application filed September 12, 1903'. Serial No. 172,877.

To (all whom, may concern:

Be it known that l, JAMES LOWE PILLING, a citizen of the United States, residing at Bucyrus, county of Crawford, State of Ohio', have invented a certain new and useful lmprovement in Air-Motors; and l declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to motors; and it consists in the improvements hereinafter described.

An object of my improvements is to provide an oscillating engine that maybe readily and cheaply constructed and which' shall be durable and mechanically eficient. l attain this object in the device illustrated in the accompanying drawings, in which- Figure 1 is a section on the line 1 l of Fig. 3, a portion of the side plate B being left in full. Fig. 2 is a diagrammatic representation of the ports and inlet-valve, showing the cylinders in their relative position thereto. Fig. 3 is a side elevation with the side plate B removed, looking in the direction of the arrow 2 2 of Fig. 1, one cylinder and aportion of one piston-rod being shown in section. Fig. 4 is a similar view to that of Fig. 3, the side plate B being secured in place, a portion of the plate being brokenaway to show the passages `therein, the cover-plate being removed from the projection B. Fig. 5 is a section of the projection B and a portion of the plate B adjacent thereto. This section is taken on the line 5 5 of Fig. 6. Fig. 6 is a section on the line 6 6 of Fig. 5.

The engine herein shown embodying my invention is designed especiallyas a motor for using compressed air, though steam may be used in it.

A is a hollow casing which may be inclosed by securing the side plate B upon one side thereof. Vithin the casing 'A are pivoted two cylinders G and G1,.connected to one crank-pin E upon the crank D upon the main shaft C. The air or workinor fluid is exhausted from the cylinders into the interior of the casing A and escapes therefrom through av port A. l

G G2 are trunnions upon the cylinders G or G2. One of said trunnions is pivoted in a bearing at the back of the casing A and the other in a bearing in the side plate B.

G1 is a pin having a disk G3 at its inner end, which disk is formed into a portion of a sphere at its inner surface and bears against the end of the trunnions G.

G5 is ahelical spring surrounding the pin G1.

G6 is a cap surrounding the pin G4 and bearing against the spring G5 and engaging by interior screw-threads with screw-threads upon a sleeve or bearing for the trunnions G.

G7 is a set-screw by which the cap GG may be iiXed in the position to which it is adjusted.

On the inner surface of the side plate B is secured annular plates P P, the inner surfaces of which are faced off to form bearings for the bearing-surfaces G13 upon the cylinders G and `Ga, through which surfaces eX- tend the valve-ports G5.

The spring G5 acts to press the cylinder G toward the plate B and keep the surfaces G13 in close contact with the inner surface of the annular plates P. Through the plates P eX- tend ports P with which register at the proper time the ports G9, leading to the cylinders G or G5.

ln the plate B are formed passages B2 B3 B4 B5, Fig. 4.. The projection B from `the plate B is formed with a cylindrical bore concentric therewith and with thick-walls having longitudinal passages B11 B15 B15 therein. These passages are open at their outer ends at the outer end of the projection B and are closed by a plate secured upon the outer end of said projection and communicate with the bore of said projection, respectively, by ports H5 HG H1. The passage B11 communicates with the passages B3 and B5 and the passage B15 with the passages B2 and B1.

B21 B21 B21 B21 are diaphragms separating the passages B3 and B1 and B2 and B5. The

plates P are secured inside of and contiguous to the diaphragms B21 s0 as to make a tight joint between the edges of said diaphragm and said plates and so as to close the adjacent portions of passages B3 B1 and B2 and IOO B5, which would otherwise be open to the interior of the plate B, so that the cores used in forming the passages may be readily removed. The passage B1 communicates directly with the interior of the casing, as indicated most distinctly in.Fig. 5.

Hb is a Corliss valve in the bore of the projection B u on a spindle H, the lower end of which spind e is formed so as to be rectangular in cross-section at the part indicated by H on the drawings.

The valve Hb is provided with a cavity which lits over the portion H of the spindle H, so as to be guided thereby. Within the portion H of the spindle H are Jformed apertures in which are placed helical springs H2, which act against the valve Hb to press the valve-faces H7 H2 against the Wall of the bore of the projection B.

B19 is the inlet-passage for the actuating fluid, as in this instance compressed air. By turning the spindle H the valve Hb may be turned to a position putting the ports HG into communication with the port H1, as indicated in Fig. 2, or it may be turned to a similar position, putting the port H5 in communication with the port H1. In the first case the port H5 is in communication with the actuating fluid and the port Hb with the exhaust-port H1, as indicated in Fig. 2, and in the second case the port H6 is in communication with such fluid and the port H5 with the exhaust-port.

B B9 are ports formed through a plate P adjacent to and upon opposite sides of a diaphragm B21.

B7 B8 B10 B13 B11 B12 are ports similar to ports B B2 and similarly located with reference to the other diaphragm B21.

In the position of the valve Hb shown in Fig. 2 the ports B6 B7 B12 B13 are open to the working Huid, and the ports B8 B1 B10 B11 are open to the exaustort H1.

When a port G2 o one of the cylinders registers with one of said ports through the plate P, that end of the cylinder receives the working iuid or communicates with the exhaust through said port. The port G1 at the opposite end of said cylinder is then in communication with the exhaust-port H4 or with the inlet-passage B12. In one case this is in proper position of the valve Hb to run the motor in one direction. If said valve is turned so as to alter the connection of the ports, as above pointed out, the motor will be in adjustment to run in the opposite direction.

In oscillating engines the cylinders are vibrated about their trunnions by the action of the piston-rod upon the cylinder at that part Where said piston-rod passes through the y cylinder-head. This action causes the piston-rod to act against the passage through the cylinder-head and enlarges it, causing a leak or injuring the packing in the stuffingbox. To provide against this, I have provided a piston G8 of conical or cup-shape form, and the cylinder-head is formed of conical form adapted to extend into the groove of the piston when the piston is at that end of the cylinder, as indicated distinctly in Fig. 3. Thus I am able to obtain a long bearing for the piston-rod in the cylinderhead without extending the cylinder to an objectionable extent in this direction. The cylinder-head at the other end of the cylinder is grooved out in any usual form to receive the nut and projecting part of the piston G8, as indicated at G10. The pistonrods F are bored from their inner ends, forming cylindrical cavities F. At the center of the cylinder-head opposite to that in which is the stuffing-box is secured rigidly a cylindrical rod G12, which extends and fits closely into the cavity F. This rod serves to strengthen the connection between the pistonrod and cylinder, and it also serves to compress air in the cavity F and cushion the parts at one end of the piston-stroke, acting as a counterbalance and maintaining the piston-rod parallel, thereby relieving wear on the stufIing-box.

What I claim is- 1. In an oscillating engine, a cylinder having a bearing-surface on one side thereof having the ports therein, a trunnion upon the side of said cylinder opposite to said bearingsurface, a pin bearing at its center and end upon the end of said trunnion, and departing from the surface of the end of said trunnion toward the periphery of its end, and a spring j acting to press said pin against said trunmon.

2. In an oscillating engine, a cylinder having a bearing-surface on one side thereof havin the ports therein, a trunnion upon the si e of said cylinder opposite to said bearingsurface, a pin bearing at its center and end upon the end of said trunnion and departing from the surface of the end of said trunnion, toward the periphery of its end, and a spring acting to press said pin against said trunnion, and means for adjusting the tension of said spring.

3. In an oscillating engine, a cylinder having a bearing-surface on one side thereof having ports therein, a trunnion on the other side lying in aY cylindrical bearing, a pin having bearing-surfaces on its inner end, a cap over the outer end of said bearing provided with screw-threads engaging with screw-threads connected with said cylinder, a spring bearing against said pin and against said cap and means for securing said cap against accidental. movement, for the purpose described.

'4. In an oscillatin engine, the combination of the pivoted cy inder, a piston therein, a piston rod extending from said piston through one of the cylinder-heads, said piston-rod being provided with a longitudinal IOO cavity therein, a rod secured at one end to a cylinder-head and extending inward therefrom and into said cavity, for the purpose described.

5. In an oscillatin engine, the combination of the pivoted cy inder, a piston therein, a piston rod extending from said piston through one of the cylinder-heads, said piston-rod being provided with a longitudinal cavity therein closed at its outer end, a rod secured at one end to a cylinder-head and extending inward therefrom and itting closely, in said cavity, for the purpose described.

6. In an oscillating engine, a casing iliclosing the cylinders, a side plate for said casing having passages therein, a projection from JAMES LowE PILLING.

Witnesses:

EDWARD VOLLRATH, MARY K. STREIB.