US779385A - Compressor. - Google Patents

Description

No. 779,385. PATENTED JAN. 3. 1905. W. P. VALENTINE. COMPRESSOR.

APPLIUATION FILED IDEO.8, 1903.

VIII/fillllll UNiTED STATES Patented January 3, 1905.

W ARREN P. VALENTINE, OF WVESTFIELD, NEIV JERSEY.

COMPRESSOR.

SPECIFICATION forming part of Letters Patent No. '279,385, dated January 3, 1905.

I Application filed December 8, 1903. Serial No. 184,249.

To a whom it 777/601] concern:

Be it known that I, VVARREN P. VALENTINE, a citizen of the United States of America, and a resident of WVestfield, county of Union, State of New Jersey, have invented certain new and useful Improvements in Compressors, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to improvements in compressors, and particularly to power-coinpressors operated by internal-combustion motors.

My invention consists in providing a powercompressorcomprising a cylinder having the same diameter at both ends and areciprocating piston fitted thereto, one end of said cylinder constituting a Working chamber and the other end of said cylinder constituting a compression-chamber, with a supplemental exhaustchamber between the cylinder and the piston and intermediate the working and compression chambers, and in providing the cylinder with an exhaust-passage communicating with said exhaust-chamber. By this construction motive fluid escaping past the piston-head at the working-chamber end will be exhausted into the supplemental exhaust-chamber and thence through the supplemental exhaust-passage instead of being delivered into the compression-chamber end of the cylinder, and so mixed with the fluid being compressed.

I will now proceed to describe acompressor embodying my invention and will then point out the novel features in claims.

In the drawings, Figure l is a view in central longitudinal section of a compressor embodying my invention. Fig. 2 is a similar view of certain portions thereof, showing a slightly-modified construction.

In the present embodiment of my invention I have provided a cylinder 1, in which is mounted a reciprocating piston 2. One end of the cylinder 1 is adapted to be employed as the working chamber of an internal-c0mbus tion motor, such Working chamber designated by the reference character 3. The other end of the cylinder is adapted to be employed as a compression-chamber and is designated by the reference character 4. The combined motor and compressor will have the usual pistonrod 5, cross-head 6, connecting-rod 7, crankshaft 8, and fly-wheel 9, or parts equivalent thereto, in order to constitute a complete working device. The cylinder'will also be provided withan inlet for motive fluid at its working end and an exhaust 1O therefor, and the compression end of the cylinder will be provided with the usual inlet valve or valves and with a discharge for compressed fluid 11. Intermediate the motive-fluid exhaust 10 and the compressed-fluid discharge 11 is arranged a supplemental exhaust 12. This supplemental exhaust is preferably located between the inner limits of travel of the piston ends, so that it will never be uncovered by the piston ends to cause it to connect directly with either the working chamber or the compression-chamber. Preferably the piston 2 will have a reduced central portion 13, arranged to register with the said supplemental exhaust.

In operation motive fluid which passes the end of the piston at the working end of the cylinder will be dischargedthrough the supplemental exhaust 12, and thereby prevented from entering the compression-chamber end of the cylinder.

My improved compressor may be employed for compressing air for purposes other than merely supplying compressed air for the working end of the cylinder, as is common in this type of combined internal-combustion motor and com prcssor, and by the foregoing construction and arrangement which provides for the discharge of motive fluid leaking past the piston will deliver compressed air or other fluid in a pure condition and not contaminated by the working gases, as might easily happen in the absence of such provision.

In Fig. 2 of the drawings I have shown a slight modification, in which the piston is of uniform diameter throughout, but in which the central portion of the cylinder is chambered out, as at 14:, to receive gases leaking past the piston from the working end of the cylinder and discharge them out through the supplemental exhaust 12.

That I claim is 1. In an air-compressor, the combination of a cylinder having the same diameterat both ends and a reciprocating piston fitted thereto, one end of the cylinder constituting a working chamber and having means for controlling admission and exhaust of motive fluid thereto and therefrom, the other end of said cylinder constitutinga compression-chamber, and having means controlling admission and discharge thereto and therefrom, said cylinder and piston having between them a supplemental exhaust-chamber, said exhaust-chamberlocated intermediate said working and compression chambers, and said cylinder provided with a supplemental exhaust-passage communicating with said exhaust-chamber.

2. In an air-compressor, the combination of a cylinder having the same diameter at both ends and a reciprocating piston fitted thereto, said piston having working heads of equal diameter fitted to the said cylinder, and having a reduced central portion, one end of the cylinder constituting a Working chamber and having means for controlling admission and exhaust of motive fluid thereto and therefrom, the other end of said cylinder constituting a compression-chamber and having means controlling admission and discharge thereto and therefrom, said cylinder provided with a supplemental exhaust-passage communicating with the chamber formed by the reduced central portion of said piston.

3. In an air-compressor, the combination of a cylinder having the same diameter at both ends and a reciprocating piston fitted thereto, one end of the cylinder constituting a working chamber and having admission and exhaust ports located at the rear end thereof, the other end of said cylinder constituting a compression chamber and having inlet and discharge ports, said cylinder and piston having between them a supplemental exhaustchamber, said chamber located intermediate said working and compression chambers, and said cylinder provided with a supplemental exhaust-passage communicating with said eX- haust-chamber.

WARREN P. VALENTINE.

Witnesses: c

D. HOWARD HAYWOOD, O. F. GARRINe'roN.

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