US876880A - Valve mechanism. - Google Patents

Description

PATENTED JAN. 14, 1908.

L. J. JOHNSON.' VALVE MECHANISM. APPLIUATION FILED MAY 2, 1907.-

v W/ TNE SSE S lLOUS J. JOHNSON, OF TERRE HAUTE, INDIANA.

VALVE MECHANISM.

Specification of Letters Patent.

Patented Jan.14, 1908.

' .ippumion mea May 2.1907. seria No. 371.428.

To all rwho/ra 'it may concern:

Be it known'that I, LOUIS J, JOHNSON, a citizen of the United States, and a resident of Terre Haute, in the county of Vigo and State of Indiana, haveinvented a new and lImproved Valve Mechanism, of which the following is'a full, clear, and exactdescription.

The invention relates to two-cycle gas eni gines, and its object is tol provide a new and improved valve mechanism, more especially designed for two-cycle gas motors having two cylinders, and arranged to insure charging of the cylinders with'a like amount of the combustible mixture, to insure uniform running of the motor.

The invention consists, of novel features and parts Vand combinations of the same, which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the views.

Figure 1 is a sectional plan view of the improvement as applied to a two-cycle gas motor having two cylinders, and Fig. 2 is an enlarged sectional plan view of the improvement showing the valves in a diiierent posil pressed previousto its entrance into the corresponding Working chambers of the cylinders of the engine. l.

In the outside chambers D and AD' are arranged the valves H and H', secured on the valve stem H2, mounted to slide at its ends in the heads A' and A2 of the valve casing A.

The valves Hand H move in unison and alternately to and from the valve seats B and B', that is', when the valve H is closed the valve H' is open, as shown in Fig. 1, and

when the valve H' isin a closed position, the'n the valve H is open, as illustrated in Fig. 2. By reference to Fig. 2 it will be seen that the valve H is integralvwi-th the stem H2,- While the valve H is held adjustably on the stem H2 by screwing thereon and being secured in position by a nut H3 after the desired adjustment is madejv Thus, by the arrangement described more Orless lift or Opening and closing movement can be given to the valves H and H' NOW when the engine is running and the piston in the cylinder connected 'with the v crank case G is on the down lor compression strokeand the piston in the cylinder connected with the crank case G.' isat the up or suction stroke, -then it is evident that the pressure in the chamber Dis reduced, While that in the chamber D is increased, and consequentlythe valves H and H' are shifted to the position shown in Fig. 1, that is, the valve H is moved to its seat B while the valve H' is moved O' its seat B. Thus compression Of the combustible mixture in the crank G can take place, and at the same time the combustible mixturel in the supply is drawn through the connection E into the central chamber C and through the open .valve seat B, into the outer chamber D',

from'which the combustible mixture passes through the channel F' into the crank case G and into the open end of the cylinder opening into this crank case G.-

strokes and begin the reverse strokes, that is,

When lthe pistons in the` two cylinders reach the-ends of their` when the pistons in the cylinder connected with the crank case G moves upward on the suction stroke and the piston in the cylinder connected with the crank case G' moves downward on the vcompression stroke, then the valvesH and H' are instantly shifted from the right to the left into the position shown in Fig. 2, so that compression of the mixture previously drawn into the crankcase G' can take place ,while the combustible mixture is drawn into the crank case G from the supply, by way ofthe connection E, central chamber (l, open valve seat B, outside .chamber D and channel F.

` From the foregoing it will be seen that the valve mechanism controls the. supply of the combustible mixture for the two cylinders of a two-cycle gas engine, by having two valves moving in unison and alternately to and from seats by the simultaneous compression and suction action of the engine. It will also lbe noticed that both cylinders receive the same quantity oi combustible mixture and the-same quality of the mixture under all conditions, and consequently the maximum power of the engine is obtained as wellas a maximum speed, as the valvesopen instantlyV and remain open during the entire stroke of the pistons in the cylinders of the engine. It will also' be noticed that as the valves have but a comparatively short movement verylittle noise, if any, is had.

The device is very simple and durable in' construction, com osed of .comparatively few parts, and not iable to easily get vout of order.

Having thus described my invention, I:

claim as new and desire to secure by Letters Patent:

1. A valve mechanism for controlling the:

i supply of the combustible mixture for a gas engine, 'comprising a air of connected valves movingin unison an alternately to and from their seats by thesimultaneous compression and suction action of the engine,

2. A valve mechanism for twocycle gas engines having multiple cylinders, comprising a valve casing having connection with the combustible mixture sup ly and with the cylinders of the motor, an connected valves for controlling the flow of the combustible mixture through the casing from the said su plyalternately to the said cylinders, t e valves moving alternately to and fromftheir 'seats by the compressing and suction action of the pistons in the said cylinderson the change of the strokemf the said piston.

3. A valve mechanism for two-cycle multiple cylinder gas e ines, comprising a casing havingspaced va ve seats forming 'a central chamber connected with the combustible mixture "supply and delivery chambers connected with the crank cases of the engine,

and valves mounted to move -in unison and alternately to and from the said seats.

4. A valve mechanism for two-cycle multiple cylinder gas engines comprising a .casing having spaced valve seats formi acentra chamber connected with the combustible mixture su ply and delivery chambers con` nected wit the crank cases of the engine, and valves having a common valve stem for the valves to move in unison and alternately to. and from their seats.

5. A valve mechanism for two-cycle multiple cylinder as engines comprising a casing having space valve seats forming a central chamber connected with the combustible mixture su ply, and delivery chambers connected with the crank casesof the engine,

valves having a common valve stem for the valves to move in unison and alternately to vand from their seats, and means for adjusting valve b'eing adjustably secured to' the valve stem.

In testimony whereof I have signed-my name to this specification in the presence of two subscribing witnesses.

LOUIS J. JOHNSON.

Witnessesi HARRY D. SNIDER, ORA D. DAVIS.

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