US284328A - Lamateb - Google Patents

Description

G. H. REYNOLDS.

(No Model.)

GASV ENGINE.

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` GRORGRII. REYNOLDS, Orjnnw YORK, CORNELIUS II. DRLAIVIATRR, GEORG LAMATRR, or sAMR PLACE.

,N.` Y., ASSIGNOR OF-ONE-HALF rIO .l H. ROBINSON,` AND WILLIAM DE- SPECIFICATION fel-ming pere of Letters Patent' Nol 284,328, dated september 4, ieee.

Application leu July 21, Itas.` (No model.)

.To a/ZZ whom, it may con/cern,.-

Be it known that I, GEORGE H; REYNOLDS,

of the city and county of N ewr Ork, in the State of New York,

have invented a new and useful 1 I 5 Improvement in Gas- Engines, of which the following is a specification.

My invention relates to those engines which are operated by an explosive mixture of air and gas, and in which the explosive mixture,

Io` taken into the cylinder at 011e stroke ofthe piston, is compressed to a high return-strokeof the piston,

degree by the and is exploded While in such compressed state. `Engines-of this class are much more economical and de- `I5 sirable than those in which the gas and air are exploded at or but little above the normal pressure, becausefor equal power they are 0f a smaller size, and because they work with V l much less clearance; but heretofore the addi l 2o tional mechanism necessaryto adapt the engine for liring under pressure has been of such complicated' characterand has added so much to the cost of the engine that onlyl gas-engines of .the larger sizes-say two-horse power and over-have been operated O11 that principle. The object of 'my invention is to provide a simple and inexpensive means for enabling the engine to firekunder pressllre, and thus to secure all the advantages ofthe more` expensive "3VO classof engines now in use, while retaining the simplicity of engines of the other class.`

`'Io this end the invention consists in the combination of a gas-engine cylinder having a large and a small compartment, apiston fit- "35, ted to the larger compartment, a valve controlling the admissionof the explosive mixl tllre to the smaller compartment and its igni tion in said compartment, and a valve separating the two compartments 'andadapted to4 40 open toward the larger compartment. The vvalve between the two 'compartments opens to allow the explosive mixture to pass through the slnaller compartment into the larger, and

l 1 to allow the fire to communicate with the gas which is under `pressurein the larger compartment when the ment is ignited.

gas in the smaller compart- I may separate or form the two compartments bya partition or diaphragm t Introduced into the cylinder and having the I valve fitted in it; or the valve itself may be 5o made `large enough to constitute a partition and close on a seat inthe cylinder. A

In the accompanying drawi1lgs,Figure 1 is a rear elevation of part/of an engine embody- `ing my invention, and Fig. 2 is a longitudi- 55 nal sectin of a part ofthe cylinder `and appurtenances. n

A Similar letters of reference designate corresponding parts in both gures.

`A designates the cylinder, which is closed 6o at the back by a hollow head, A', in which is the usual mixing-chamber, a; Gas is introduced to the mixing-chamber a by a passage or Ainlet opening, b, and air is introduced thereinto through a pipe, c, provided with the 'usualreservoin c', to prevent the loss of gas by its escapinginto the atmosphere.

- On the inner side of the head A is the usual disk-valve, B, which controls the inflow of the mixture of gas and air from themixing-cham- 7o ber a, and which also controls the ignition of the explosive mixture from a j et or burner, d, which is arranged in a recess in the head A', and communicates with the cylinder when an aperture in the valve B comes opposite `a small aperture in the head A. The .diskvalve B is mounted upon a stem or. shaft, B', upon which is a gear-wheel, B2, and said stem, and-valve are rotated by awheel, B3, on a shaft, B4, which extends lengthwise ofthe en- 8O gine and is geared with the crank-shaft of the engine. I have not shown the crank-shaft or the connection with the shaft B4; but as in engi-nes of this kind the shaft B? commonly `works the exhaust-valve, it follows engine firing under pressure the shaft Bt should make only one revolution to two revo lutions of the crank-shaft, so that the exhaustvalve will be opened onlyduring the returnstroke of the piston which follows the explosion. n I have not shown the exhaust meehani'sm, as it forms no part of my present invention.

In the cylinder A is tted a partition or diaphragm, C, dividing the cylinder with two compartments, e f. The former compartment, e, which is very small, receives the explosive mixture of gas and air from the valve B, and

that in an 85 larger compartment f,

Athe valve-stemor shaft B, and has a spring,

g2, applied to its rear end to hold the valve closed.

In lieu of having a fixed partition and a valve tted thereto for dividing` the cylinder into two compartments, I may employ a larger valve, which by seating on the cylinder will 'constitute a partition to form the two compartments ef..

Referring now to the operation of the engine, I will suppose that the piston is just about to commence its movement away from the partition or diaphragm C, and that the valve B is just about to admit the explosive mixture to the compartment e. As the piston moves, it draws in a charge of the explosive mixture through the compartment@ and valve g,- but when the piston commences its return movement, the valve g instantly closes, and hence at the completion of the return movementthe mixture in the compartment f is highly compressed, while the mixture in the compartment e (supposing the valve g to be tight) is at the normal pressure. If the ignition-burner d were exposed to the compressed mixture in the compartment f, it would be blown out without firing the gas; but the mixture inthe compartment e, notbeing compressed, is red when the valve B exposes theV ignition-burner d. rIhe pressure produced by the explosion of the mixture confined in the compartment e momentarily opens the valve g and. ignites the compressed mixture in the compartment f, which acts upon the piston. Moreover, the mixture confined in the comin the compartmentf,

partment e becomes heated sufficiently to produce a slight degree of expansion before it is fired, and consequently when the vignitionburner d is exposed by the valve B there will bea slight puff ofthe explosive mixture through the apertures in the valve B and cylinder-head A to'meet the burner; hence the iiring of the mixture in the compartment e is rendered certain.

The construction of the cylinder with the partition C and valve g adds comparatively nothing to the cost of the engine, and does not complicate it in any way; hence my invention may be embodied with'advantage in the smallest gasengines, and will greatly increase their power as compared with engines which do not fire under pressure.

lhat I claim as my invention, and desire to secure by Letters Patent, is

l. rIhe combination of a gas-engine cylinder having a large and a small compartment, a piston tted to the larger compartment, a valve controlling the admission of the explosive mixture to the smaller compartment and its ignition in said compartment, and a valve separating the two compartments and adapted to open toward the larger compartment, substantially as and for the purpose described. 2. The combination of the cylinder A, di-` vided by the partition C into small and large compartments e f, the head A', the piston D in the compartment f, the valve B in the compartment e, and the valve g in the partition C, all substantially as described.

3. The combination of the cylinder A, divided by the partition C into small and large compartments e f, the head A', the piston D the valve B in the compartment e, the hollow valve stem or shaft B', the valve g and its stem g', and spring g2, all substantially as described.

GEO. H. REYNOLDS.

Vitnesses:

FREDK. HAYNEs, ED. L. MORAN.

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