US307128A - Louis chaely ltjgmaye - Google Patents

Description

( No Model.)

L. G. LUGMAYR.

VALVE GEAR FOR. ENGINES.

No. 307,128. Patented Oct. 2 1884.

lNV E NTBFE y WI+NEEEEE= 6. dfi 6 N. PETEBi Pholmulhugraphar. Wrlihlngiun. n. c.

I UNITED STATES PATENT Orrics.

LOUIS CHAR-LY LUGMAYR, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE-HALF TO JOHN GBIME, OF SAME PLACE.

VALVE-GEAR FOR ENGINES.

SPECIFICATION forming part of LettersPatent No. 307,128, dated October 28, 1884.

Application filed May 26, 1884. (No model.)

I (0% whom it may concern:

Be it known that I, Louis 0. LUGMAYR, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Valve-Gear for Engines, of which the following is aspecifieation.

My invention relates to that class of steamengines in which the valves are operated with one eccentric; and the objects of my invention are to work the valves for cutting off grams of the mechanism and operation.

bymeans of one eccentric, and to enable the engine to be reversed with the same mechanism.

The invention consists in the slide-block connected with the eccentric and valve-rod,

and carried by a guide or slide suitably pivoted to swing for shifting the valve, and in the adjustment of other parts of the engine to suitsuch mechanism.

In the drawings, Figure 1 is a side view ofa vertical engine containing the improvements. Figs. 2, 3, and at are illustrative dia- Figs. 5 to 8 are details of the guide and block.

B is the crankshaft ol' the engine, provided with the cranlearm b, from which the rod 7; passes to the cross-head or pistoirslidef,

A is an eccentric on the shaft B, provided with a strap, a, from which the arm a extends in a plane parallel with the plane of the crank-arm I).

G is a rod from the eccentric-arm a to the valve-stem v. The end of the rod 0 is pivoted to'the arm a, within the slot a", by means of a thumb-screw or other suitable means, whereby it may be adjusted to regulate the valve movement.

D is a rock-shaft fitted in suitable hearings on the bed-plate, and provided with a handlever, 71 by means of which the rock'shaft can be given the desired partial revolution. This hand-lever moves at the side of a segment-plate suitably notched for engaging a spring-catch, h, on the lever, and the lever is thereby held in the position to which it is moved.

On the end of the rock-shaft D is the guide 6, carrying the slide-block c, at the center of which is connected the eccentric-arm a by a pivot, r. The guideeis a solid piece of metal,

preferably made somewhat wide and flat, and has its edges beveled on the side next to the rock-shaft, and fits into a corresponding groove in the block 0. the guide 6 and block 0 may be somewhat varied from the forms shown and described to serve the same purpose. The lever h enables the rock-shaft to be turned, so as to bring either end of the guide 6 above or below the axis of the rock-shaft, as desired. The two extreme positions to which the guide may be turned are shown by the lines a: m and y y in Figs. 2, 3, and 4., in both of which positions the cutoff is made at full-stroke. By adjusting the guide to intermediatepoints, by means of the lever 71., the cut-off may be regulated as desired. In any position of the guide the revolution of the shaft B moves the eccentricarm a, in and out and carries the slide-block c forth and back on its guide, and the rod and when the guide is turned to its extreme lim its, as illustrated in the diagrams Figs. 2, 8, and 4. The valve movementcan also be somewhat controlled by adjustment of the valverod G in the slot a in the eccentric-arm, an adjustment toward the outer end of the arm tending to shorten the throw of the rod and toward the eccentric tending to lengthen the rod-throw.

In building the engine the parts should be so constructed that,in setting up,the geometric center of the eccentric will beiuline with the axes of the crank-pin Z and shaft B, and the axes of the shafts B and D should be in the same horizontal plane in a vertical engine and in the same vertical plane in a horizontal engine.

I am aware that in Letters Patent No. 252,683, granted to myself January 24, 1882, is shown a means for operating engine-valves with one eccentric and for reversal of the engine with the same mechanism, and I there= fore do not claim, broadly, such construction and combination; but

Vhat I do claim, and desire to secure by Letters Patent, is

The shape and size of LOO The combination, with the shaft 13, having I block being connected to the eccentric-arm a the cranlparrn I), connected by it rod to the by t pivot, a, all constructed and arranged I0 cross-head, and the eccentric A, having the substantially as and for the purpose set forth. strap a and arm (1 provided with the slot a T t t r T ,p

5 within which the i'od 0, connecting with the Is CHARLY LUGMAXR' valve-stem o, is pivoted, oi the lever 71, at- Vitnesses:

tachcd to the rock-shaft D, on which shaft is J. F. GoLLoM, carried the guide a and siideblock c, said siide- MILTON H. BIOKEL.

Images