US1091519A - Engine-starter. - Google Patents

Description

G. M. LEECH.

ENGINE STARTER.

APPLICATION rum) mom, 1912.

Patented 31, 1914.

2 SHEBTS-SHEET 1.

mm Jul 6 e a 0 FATE FTC.

CHARLES M. LEECH, OF LIMA, OHIO.

ENGIN Iii-STARTER.

i ,osn,51o.

Specification of Letters Patent.

Patented M21133], 1914.

Application filed August 27, 1912. Serial No. 717,323.

To a?! whom it may concern:

Be it known that I, Cnnnnns M. LEECII, a citizen of the United States, residing at Lima, in the county of Allen and State of Ohio, have invented certain new and useful Improvements in Engine-Starters, of which the following is a specification.

The present invention relates to pneumatic means for cranking or starting an internal combustion engine.

An important object of the invention is to provide means of the above mentioned character, which are automatic in operation, simple in construction, durable, and cheap to manufacture.

A further object of the invention is to provide means of the above mentioned character, so constructed that when the same is at rest, it will not interfere with the proper operation of the engine.

In the practice of my invention I provide a device which is adapted to supply compressed air or the like to one side of the piston, to move the same in one direction. When the piston starts on its opposite movement, the device is automatically operated to out ofi? the supply of compressed air and exhaust the compressed air which has previously moved the piston.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, Figure l is a central vertical sectional view through an engine equipped-with my improved structure, Fig. 2 is a central vertical sectional view through the device, showing the sliding valve in its intermediate position to establish communication between the interior of the crank case and the atmosphere, Fig. 3 is a similar view, showing the sliding valve in its uppermost position, to supply compressed air into the crank case, and, Fig. 4 is a similar view, showing the sliding valve in its lowermost position, the device being at rest and serving as means for allowing the free passage of air into or out of the crank (fuse,

In the drawings wherein, for the purpose of illustration, I have shown a preferred embodiment of my invention, the numeral 5 designates an explosion cylinder of an internal combustion engine, provided with inlet and exhaust ports 6 and 7. Mounted to reciprocate within the cylinder 5 is a hollow piston 8, provided at its lower end with an auxiliary piston 9, of greater diameter than the cylinder 5, as shown. The auxiliary piston 9 operates within a lower casing 10. connected with the cylinder 5 at its upper end and with a closed crank case 11 at its lower end. Extending into the piston S a pitman 12, connected therewith by means 61: a pin 13. The pitman 12 is connected at its lower end with a crank 12 by a pin 15. This crank is rigidly connected with the crank shaft 16, as is customary. As no claim is made to the construction of the engine per sc, it is thought that the above description will sufiice.

The crank case 11 is provided with an tion 18 of a shell included in my improved starter. The shell comprises an pppcr contractcd portion 19, which is preferably cast integral with the large portion 18. The contracted portion 19 extends downwardly within the large portion 18, is shown at 20.

Mounted to reciprocate within the contracted portion 19 a sliding valve 21, provided with an opening or recess 22, as shown. The sliding valve 91 is connected with a stem 23, extending through an opening in the upper end of the contracted portion 19. A compressible coil spring 2% surrounds the stcm :22, within the contracted portion 19 of the shell and serves to force the sliding valve '21 (lowuwnrdly. Connected with the upper end oi" the stem 23 is a roller 25, which is adapted to engage a cam 27, rigidly mounted upon the crank shaft 16.

Formed through the large portion 18 of the shell is an auxiliary exhaust port 28, which leads into the interior of the contracted portion 19, as shown at A transverse port serves to establish communication between the interior of the crank case and the interior of the portion 20 of the shell. Formed through the large portion 18 of the shell is a breathing port 31, having communication with an opening 32. The sliding valve 21 is provided near its upper adapted to be moved into registration with 21 is in its lowermost position, as shown in Fig. t. A pipe 33 leads into the breathing port 31.

The numeral 34 designates a pressure storage tank, containing compressed air or the like. Connected with this tank is a pipe opening 17, to receive a lower enlarged porend with a transverse port 33, which is the opening only when the sliding valve openi11g 22, opening the pipe is a v shell 36 and a swing therein. This valve is turned h s. 38. The velie provided Wit),

of the pipe 35, who] is supplied to the star also provided with. so i e20, leading into the main ening 39. The 36 is provided with a small opening il, dis posed at a right angle to main openings Attention called to the fact hatthe starter disposed to one side of the 14, so that it does not in any Way interfere with the operation of t gins.

The operation es in? dc is fol.- lowss-ll hen the valve is c osed, as shown in l ig. 4;, the f the sliding valve 521 to its "owermost position. The interior of tie ennk case 13. is now in free communication with the'pipe e: is

7 0o whereby air passes r ,lyinto and out of said crank case during the inovez'nent' of the pie ton. In the ordinary multiple cylinder 611 g'ine the pipe 33 serves to couple all the crank together, whereby they are in communication during the operation of the engine. ll place one oi my starting zipperetuses Within each crankcase, the same having suitable connection with the common pressure supply pip-e above the valvesteuctnre it is thoiwht that as these starting eppzimtuses are it lillCiLl only one need be shown descri? d in application. Attention. is c: led to the feet that any compressed air ((f:"3li':-if Il=Cl Within the pipe 85 shove the valve is free to exhaust to the atmosphere through on :20, and L1. The "eng may now considered at rest. To start the handle 38 is swung to move the valve 37 to its open position. Goings ed air l the pipe and foices the sliding upwardly, to assume position shown in Fig. 3. The comgnes M through the port ZOinto the crank case on' forces the piston upwzi-Tcllb hen the piston reaches its eppermost posit on the cam 27 has been turned so that its large portion engages the "Wheel to downwardly to assume it. intermediat he he sition, shown in l? 2. The compresscc 8-11 Within the crank case 1 will new on:

lmust to the atmosphere through port 30,

and port- Et 1s n will I he allowed to thus seen that the 0 move downwardly. "the 7 reaches its lowermost peel-J11, compro air is again introduced the crank case shell air now passes with the lower end l is val is closed, si sequently to which the spying will move the sliding valve 21 to its loi ei'most position, as shown in Fig. l.

the valve 21 is in its lowermost positio-., the interior of the crank case 11 is in. free communication with pipe through ports 30, 2rd, 53 and 3]., Wheeloy the interior of the crank-case will he in communieticn with the atmosphere or in breathing communication With the other cronlz-cese or crzmlz-eases. v

It is to be understood that the form of my invention herewith shown and described is to he taken as a preferred example of the some and that certain changes in the shape, size, and arrangement of parts may he resorted to Without departing from the spirit of the invent-ion or the scope of the subclaim:

1. The combination with an internal cembiistion engine comp-listing a cylinder, :1 piston operating therein, e closed crank case, crank shaft, pitnian connecting the piston and crzml: shaft, of means to supply compressed into the case to move said piston in one direction, and means automatically operated by the movement of the piston to cut the supply of compressed air from the crank case and establish conimonication between the interior oi": the same and the atmosphere, so that the piston. may move in a reverse direction.

2. Thece nhine. ion with the closed crank case of an internal combustion engine, of means for supplying compressed air into the same, and means operated by such compressed ill to establish communication he I 4 l a n q i x I u I 1 tween L118 lllterlQl or the 01 not C1156 and toe atmosphere.

' The combination with the closed-crank case of an internal combustion engine, of means for supplying compressed air into the same for starting the engine, and auto mst-ieally operated means to cut 05 the sup ply of compressed air Item the crank case. and place the interior of the crank case in communication witlithe atmosphere.

l. The combination with an internal combustion engine comprising a cylinder, e piston a closed crank case. a crank shaft andto foi ce the same upwardly. The operation l sliding valve, and means to supply compressed air into the shell to move the sliding I valvein opposition'to the spring.

5. The combinationwith an internal comb'ustion engine comprising a cylinder, a piston, a closed crank case, a crank shaft, and a pitman, of a device to start the engine comprising, a shell having a breathing port, an inlet port leading into the crank case,

nd an exhaust port leading to'the atmos pherc, a sliding valve mounted within said shell and provided with transverse and lon gitudinal openings, a spring to move the valve in one direction, means for supplying compressed air into the shell to move the valve in a reverse direction, and means operated by the crank shaft of the engine to move said valve.

6. The combination with an internal combustion engine comprising a cylinder, a closed crank case connected with the lower end thereof, a crank shaft mounted within the crank case, a piston mounted within the cylinder and a pitman connecting the piston and crank shaft; of a device mounted within the closed crank case upon one side of the crank shaft and adapted to supply compressed air into the crank case upon the up stroke of the piston and 'cut 01? the supply of compressed air from the crank case and establish communication'between the same and the atmosphere upon the down stroke of the piston; and a device mounted upon the crank shaft to automatically operate the device.

7. The combination-with an internal combustion engine comprising a cylinder and piston operating therein, of a starting device to supply compressed air within the cylinder to move the piston in one direction and to alternately establish communication between the interior-of the cylinder and the atmosphere, comprising a shell provided with inlet and exhaust ports, a sliding valve mounted within the shell and adapted to be moved to a position for connecting the inlet and exhaust ports and to another position for disconnecting them and uncovering the inletport, a spring to move the sliding valve in one direction, and a pressure supply pipe leading into the shell near one end of the sliding valve to supply pressure therein to move the valve in opposition to the spring.

8. The combination with the crank-case of an internal combustion engine, of apparatus disposed near the crank-case to start the engins by compressed air or other fluid,'comprising a shell provided with a breathing port, an exhaust port, and a pressure inlet port, and means whereby the ports are selectively placed in communication with the interior of the crank-case.

In testimony whereof I affix my signature in presence 0 two witnesses.

CHARLES M. LEEOH.

Witnesses: v e

W. J. Brenna, CLARENCE C. MILLER.

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