US962214A - Valve-control mechanism for explosion-engines. - Google Patents

Description

. N. T. HARRINGTON. v VALVE CONTROL MECHANISM FOR EXPLOSION ENGINES.

' APPLIO ATION FILED JA'N.20, 1908.

Patented June 21, 1910.

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- m um b W e h b aw f azrwwaw 'N. T. HARRINGTON. v VALVE CONTROL MECHANISM FOR EXPILOSION ENGINES.

APPLICATION FILED JAN. 20, 1908.

Patented Jl llle 2 1, 1910.

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NORMAN r. HARRINGTON, or LANSING, MICHIGAN.

VALVIl l-CONTROL MECHANIS M FOR EXPLOSION-ENGINES Specification of Letters Patent. Patented June 21, 1910.

Application filed January 20; 1908. Serial No. 411,739.

all whom it may concern:

Be it known that I, NORMAN T. HARRING- 'roN, a citizenof the United States of America, residing at Lansing, in the county of Ingham and State of Michigan, have invented certain new and useful Improvements in Valve-Control Mechanism for Explosion-Engincs, of which the following is a specification, reference being had therein to the accompanying drawings. 4

It is the object of the invention to obtain a construction of controlling mechanism for valves of explosion engines by which the valves may bercadily ad: pted for o crating with different gases; for lnstance, if the engine as originally designed isintended for the use of manufactured gas a slight adj ustment adapts it for the use of natural gas or for a gas from a suction producer.

The invention consists in the means employed for controlling separatel the gaseous ingredients forming the exp osive mixaire, as for instance air and the fuel gas;

further in the means whereby the separate controlling valves are simultaneously operated and correspondingly tuned; further 1n the means by which the amplitude of movement of said valves is correspondingly automatically varied with variations in the load; and, further, in the means for adjusting the relative degree of movement of the-separate valves without effecting either the timing thereof or' the corresponding adjustment of the engine by the automatic control,

In the drawings Figure 1 is a side elevation, partly in section, of myimproved valve operating and controlling mechanism; Fig.

2 is a plan view thereof, also partly insection; Fig. 3 is a diagrammatic view illustrating a modified construction.

A is the engine cyl nder conta-lnlng the mixing chamber A, and B is the main admission valve controlling the port from the mixing chamber into the cylinder proper.

C is a casing connected to the cylinder and communicating with the mixing chamber A, this chamber being divided by pa-rtitions into separate compart'mcntsC D and E. The compartments D and E are respectively connected with inlet conduits for air, gas or other gaseous ingredients of the explosive mixture, and F and G are valves The operating mechanism for the valves F and G comprises a rod H operated by any suitable mechanism not shown) and controlled by any suitab e construction of antomatic governor so that the stroke is varied in amplitude with varying loads of the engine. The particular construction of this governing mechanism forms no part of the present invention and is therefore not illustrated in the drawings, as various constructions well known in the. art may be employed for this purpose. The rod H is also employed for operating the main inlet valve B of the engine, and to this end is connected to a rock arm I Which operates a rock shaft J, the latter being connected through the medium of compound levers or rock arms K and L to a second rock shaft M. This shaft M has secured thereto two rock arms N for respectively operating the valves F and G through the medium of bell crank levers P P. Each of these bell crank levers has secured to one arm thereof an adjustable bearing Q, preferably a roller bearing, which contacts with the corresponding rock arm N, whereby the degree of movement imparted therefor to the bellerank levers is-changed. The opposite arms of the bell cranks 1 I contact with the stems R of the valves F and G respectively, and springs S serve to seat the valves and actuate the bell cranks in the opposite direction.

In operation the movement of the valve rod H is transmitted to each of the valves B, F and (l, which are operated simultaneously thei cl'iy, and are timed for the proper operation of the engine. The degree or am- )litude of movement iven to each valve 1 ment of the rod H, this being varied by the governor in the usual way, as, for instance, by the shifting of an eccentric. The amplitude of movement of the valves F and G is however further dependent upon the particular adjustment given to each of the adjustable bearings Q and the bell crank levers P, Thus if thesebearings are adjusted into similar ositions on their bell cranks the amplitu' e of movement of the two valves F and G will be the same, and may be more v amplitude of or less in relation to the movement of the valve 13. On the other hand, if the bearings Q, are differently adjusted upon the bell cranks N N, as illustrated in Fig. 1, the movement imparted to one of the valves, as (l, willl be greater than that of the other valve but with each and everyadjustment both of the valves will be simultaneously seated and unseated by the operation of the rod H.

. .By means of the construction and'adjust ments just described, the proportion of the ingredients composing the explosive mixture may be adjusted to the greatest degree of nicety, and consequently greater power may be developed than with a construction where the mixture is less perfect. The adjustment is quickly effected preferably by providing a thumb screw T for clamping the bearings Q, imposition.

While-L have described a specific construction of mechanism intermediate the valve operating rod and the separate valves F and G, it is obvious that this may be modified without departing from the spirit of my invention-for instance, in Fig. 3 is illustrated diagrammatically a modified con struction, in which F G are the separate air and gas valves, H the rod operated by a cam U and a shaft U of the engine, and V a lever which is rocked by the rod H. This lever is provided with a pair of segmental arms V to which are adjustably con-' nected the radius arms W, having their opposite ends attached to bell crank levers X. One arm of each of the bell crank levers X is arranged in parallelism with a rock arm Y, and between these rock arms Y and the arms of the bell cranks are arranged shiftable bearings Z. In operation the valves F i are simultaneously operated by the move ment of the shaft U, cam U, rod ll" and intermediate connections. The amplitude of movement imparted to these valves is dependent, first, upon the position of'the intermediate bearing Q, and these may be shifted by an automatic governor, not shown, and, second, the relative degree of movement of the valves may be changed by an adjustment of the radius rods \V in the point oi connection to the segments V.

What I claim as my invention is:

1. In an explosion engine, the combination with a mixing chamber, of a plurality of valves for separately and inelepemlently controlling the admission of the gaseous ingredients for the explosive mixture to said chamber, and timed operating mechanism for simultaneously seating and u-nseating said valves adjustable to vary the relative movement thereof.

2, In an explosion engine, the combination with a mixing chamber, of 'a plurality l of valves for separately and independently 6 controlling the admission of the gaseous ini gradients for the explosive mixture to said chamber, and timed mechanism for simultaneously seating said valves intermediate i suction strokes, said mechanism being adjustable to vary the relative degree of move? ment'of said valves.

3. In a gas engine, the combination with a plurality of valves for separately controlling the gaseous ingredients forming the explosive mixture, 2. main admission valve for the explosive mixture, a chamber intermediate said main valve and the valves for the separate ingredients, timed mechanism for simultaneously seating and unseating'all of said valves, and means for varying the amplitude of movement of the ingredient controlling valves. Y

4:. In an explosion engine, the combination with a mixing chamber having separate air and gas admission ports thereto, valves respectively controlling said admission ports, a common timed actuating mechanism for simultaneously .unseatingand seating said valves at the beginning and ending of each suction stroke, and means for rela-. tively varying the amplitude of movement of said valves.

5. In an explosion engine, the combination with a mixing chamber having separate admission ports for air and gas respectively controlling said ports, a common timed actuating mechanism for simultaneously unseating and seating said valves at the beginning and ending of the suction stroke, and intermediate connections between said common actuating mechanism and, the re-' spective valves whereby their relativevdegrees of movement may be adjusted without changing the timing.

6. In an explosion. engine, the combination with an admission valve, of an adjustable actuating mechanism therefor comprising a pair of eoiiperating rock arms and an adjustable hearing in one of said arms for variably contacting with the other arm.

7. in an explosion engine, a pair of valves,

rockable member for simuitaneously'actuating said valves, separate intermediate rock'abie members for transmitting the movement of said first mentioned member to the respective valves, and adjustable bearings for varying the pointof contact of said first mentioned rockable member upon the respective intermediate rockable members.

8. A valve actuating mechanism compris-' ing a reciprocatory rod, a rock shaft actuated\ thereby, a second rock shaft, compound levers for transmitting movement from the first to the second roel: shaft, :1. pair of rock arms on said second rock shaft, a pair of bell-crank levers, and adjustable bearings tudes of movement of said valves without 10 forming contacts for said bell cranks with changing the timing thereof. the respective rock arms on said second rock In testimony whereof I affix my signashaft. 1 v ture in presence of two witnesses.

9. In an exp osion en ine the combination with a timed admiss i on ilalve, of corre- NORMAN HARRINGTON spondingly timed valves for separately con- Witnesses: trolling the admission of the air and gas, NELLIE KINsELLA,

and means for adjusting the relative ampli- JAMES P. BARRY.

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