US842817A - Valve control and reverse mechanism. - Google Patents

Description

EAPPLIOATION FILED APR.18,1906.

ATENTEE AN; 29, 1907.

UNITED STATES PATENT VALVE CONTROL AND REVERSE MECHANISM.

To all whom it may concern):

Be it known that 1, JOHN W. SLATER, a

' citizenof the United States of America, and

a resident of. Slatersville, in the county of' Providence and State of Rhode Island, have invented certain new and useful Improvements in Valve Control and Reverse Mechanism, of which the following is acspecification.

This invention relates to means for regulating and controlling the degree of lift of the valves in a gas-engine, together with means for so timing the actuation of said valves that they will permit the engine to run either in the forward or reverse direction, as desired.

My improvements comprise certain changes.

in construction and arrangement of parts differing from my former application, Serial No. 261,869, (since matured into Patent No. 828,064, dated August7, 1 906.)

In the drawings, Figure 1 is a side elevation of parts embodying my improvements shown in operative relation with a valve of an internal-combustion engine. Fig. 2 is a section on the line 2 2 of Fig! 1. Fig. 3 is a similar view to that of Fig. 1, showing the actuating parts elevated by the cam. Fig. 4 is a bottom plan view of. the bipart pivotal link, and Fig. 5 is a sideview of one part of said pivotal link. A

In said figures, A indicates a broken-away portion of a gas-engine cylinder having a valve-opening, and B indicates a valve seated within said opening and having a spring I) to hold it normally closed. The valve stem or rod passes through a guide, as b, which maintains said stem or rod in a true vertical position. The means provided for lifting the valve through the medium of its stem or rod comprise a link, which may be in two parts C C, pivotally united at c'and having an outer curved surface 0', adapted to form. a

' way or track movable against the end of the valve stem or rod.

The pivot D, uniting the link members, is tearried by a supporting-arm E whose opposite end is mounted on a cam-shaft F.

G G indicate, respectively, separate eccentric-stra s mounted upon circular supports, as g g, w 'ch latter are placed about the camshaft, and'each has a localizing extension .or arm, as 9 that is fulcrumed upon a rockshaft 9 which is mounted in a rigid part of the frame. Secured upon the camshaft F within the circular supports 9 g, respec- Specification of Letters Patent.

Application filed April 18. 1906. Serial No. 312,292.

tively, are cams H H, Whose radial enlargements h h, respectively, contact with and are adapted to move against the. inner surfaces of said circularsupports. I i

The eccentric-straps I G provided with rods g g, the latter being pin men -6am. 29, 1907.

Gt are respectivelyoted, respectively, to: lugs 0 0 depending I from the link members C C, whereby movement communicated through said eccentricstrap rods 9 g rocks said link members 0 C upon their common pivot D.

Secured against the inner surfaces of the circular sup orts g g are the cam-drops or curved disp acing-blocks k h, respectively, said blocks h h serving to elevate the eccentric-straps and rods through the action of the cams in the rotation of the latter.

It will be noted that the blocks h k are so positioned within the circular supports g as to be in the vertical plane of the va vestem and the axis of the link members. Thus while the supporting-arm E holds the pivot D, which carries the link members, in a set position beneath the valve-stem, thereby affording a neutral point at which no movement is communicated to the valve with the rotation of the cam-shaft, it is evident that the opposite rocking movement which is communicated to the link members becomes effective in lifting the valve-stem and valve when the link is moved laterally in either direction. It is further evident that the degree of lift imparted to the valve varies according to the degree to which the link is moved and presents its upper surface or way towardthe valve-stem in different positions having different degrees of vertical movement.

The means for moving the link to vary its position relatively to the valve-stem may be as follows'i A lever f is secured to the rockshaft 9 to which is also connected a rod or barf, the latter carrying pivotally a rod or bar f that is freely connected to the pivot D. A set of the rods or bars f f a is employed for each link, and all are operated through the medium of the single lever f, as is obvious. The modus operandi with respect to the valve operation to run the engine in the forward or reverse directions and the means employed pression correspond with the means referred to in'my'said former patent application. In fact, the, main difference existing between said former application and the present case resides in the arrangement of the present hinged link to move laterally under a valve rod or stem that is immovable except vertically, to actuate the valve difierently, while in the former application the hinged actuator was immovable laterally and the valve push-rod was movable over the surface of said actuator to accompilsh a like result.

The present device is more particularly adapted for use where a short valve stem or rod is used.

I claim J In an internaLcombustion engine having a valve and a valve-stem therefor, a bipart actuator for said stem composed of two hinged members, a cam-shaft having a pair of cams, an actuator-support pivoted to said camshaft and having a pivot uniting said actuator members, a pair .of circular supports about said cams, and having localizing eX- tensions, and a fixed cam-displacing block within each support; together with an eccentrio-strap mounted upon each circular support, and a rod extending from each strap, said rods being respectively pivoted to the actuator members.

Signed at Kissimmee, Florida, this 13th day of November, 1905.

JOHN W. SLATER.

Witnesses:

J. M; WILLSON, Jr.,

W. B. Hm'ron.

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