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Publication numberUS735912 A
Publication typeGrant
Publication dateAug 11, 1903
Filing dateFeb 7, 1901
Priority dateFeb 7, 1901
Publication numberUS 735912 A, US 735912A, US-A-735912, US735912 A, US735912A
InventorsCarl Schrotz
Original AssigneeCarl Schrotz
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Rebound-preventing device for gas-engines.
US 735912 A
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Description  (OCR text may contain errors)

PATBNTED AUG. '11, 1903.




WITNESSES UNITED STATES Patented August 11, 1903.



SPECIFICATION forming part of Letters Patent No. 735,912,dated August 11, 1903.

Application filed February "7, 1901. serial No. 46,341. (No model.)

tion, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improved apparatus that is to be inserted into the pipe admitting gas to a gas-engine and whereby the t pressure in the neighboring pipes is rendered more nearly equable and the flickering of flames fed by the same is prevented The apparatus consists of a return-valve preferably arranged within a chamber con-" nected with the admission-pipe.

Of the accompanying drawings, Figure 1 is a longitudinal section, and Fig. 2 a cross-see tion on line 00 y in Fig. 1, of the preferred construction of the herein-described appa- 2 5 ratus.

The same letters of reference indicate the same parts in both figures. I

In the drawings, M is a gas-pipe supposed to be connected with the gas-main, and F is the gas-engine and admitting gas to the same.

Between both pipes is placed the air-tight chamber 0, preferably made in the shape of a cylinder. Within this cylindrical'chamber and closely fitting one end of the same is placed the circular flange B, with a stud S in its center. The st'ud S, I prefer to cut off obliquely, as shown in the drawings. I further provide a flat lid or cover V, suitably hinged at one end, which partly by its own weight and partly by the action of the spring N is normally pressed against the edge of the stud S.

In order to secure tight closing of thelid a feed-pipe supposed to be connected with The pressure of the spring N can be adjusted by means of the screw 0, which passes through the wall of the chamber C, and there- :fore remains accessible at all times. t

1 The operation of the herein-describedapparatus is as follows: \Vhen the engine begins to suck, a certain reduction of pressure in thechamber C will precede the lifting of the cover V. The'spring N ought to be adjustedin such. a Way that. the difference of pressure on both sides of the lid V is merely 6o sufficient to lift it very slightly, and thus a wider opening of the valve is only effected when the inertia of the stream of gas has accumulated. When the period of suction has attained its end and the cut-on? valve of the engine has closed,-the flow of the gas will still continue for ashort time until the increasing pressure in the chamber 0 gradually stops it. At this period, however, the lid V, being subjected to the pressure of the spring N,besides the gas-pressure in chamber G,will close before the pressure in O has increased to the full amount of the pressure in Maud will thereby prevent a rebound of the gas, which otherwise usually is effected by the congestion ofthe gas in admission-pipes to gas-engines. It will readily be seen that the action of my apparatus is regulated not only by the pressure of the spring N, but also by the capacity of the chamber 0, and since the gas inclosed in the feed-pipe F will add its cushion action to that of the gas in the chamber O the size of the latter can be varied according to the length of the feed-pipe, and where the feed-pipe is sufficiently long the chamber 0 might be omitted altogether without altering the nature of my invention. Likewise if instead of having a sufficiently long feed-pipe an elastic reservoir were pro vided in the feed-pipesuch as, for instance, the rubber bag usually employed for the purpose-the same result would be obtained.

- Having now particularly described and as-' certained the nature of my said invention and in what manner thesame is to be performed,

-I declare that what I claim is.

An apparatus for preventing the rebound of gas in the feed-pipe of gas-engines, consisting of a chamber arranged in the feedtion with exteriorly-operabie means for regupipe, said feed-pipe, where it discharges into lating the pressure of the spring upon the lid. 10 the chamber, being formed in the shape of In testimony whereof I have affixed my an obliquely-truncated stud having its dissignature in presence of two witnesses.

charge substantially in line with the How of CARL SCHROTZ.

the gas through said feed-pipe, a hinged lid Witnesses:

closing the oblique mouth of said stud, and CHARLES LE SIMPLE,

a spring bearing upon said lid, in c-oinbina- KARL SCHMITT.

Referenced by
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US2419318 *Nov 8, 1944Apr 22, 1947Aro Equipment CorpCheck valve
US2461351 *Nov 21, 1945Feb 8, 1949Leslie SilvermanFlowmeter
US5046408 *Jul 13, 1990Sep 10, 1991John EugenioHooded exhaust vent
US5099886 *Aug 22, 1989Mar 31, 1992Grovag Grossventiltechnik AgSeals for gas isolators having multiple bias springs
US5772928 *Jun 14, 1996Jun 30, 1998Holtzman; Barry L.Needle and seat valve assembly
US6050294 *Mar 17, 1999Apr 18, 2000Val-Matic Valve And Manufacturing Corp.Spring return check valve
US6393628 *Jun 2, 1999May 28, 2002James Edward KelloggValve assembly for swimming pool cleaning systems
US6823896 *Mar 4, 2002Nov 30, 2004Samsung Gwangju Electronics Co., Ltd.Valve assembly of a reciprocal compressor
Cooperative ClassificationF02D17/04