US541291A - Valve-gear - Google Patents

Description

(No Model.)

E. SALZER. VALVE GEAR.

Patented June 18, 1895.

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UNTTE STATES PATENT OFFICE.

EDUARD SALZER, OF LA POR'IE, INDIANA.

VALVE-GEAR.'

SPECIFICATION forming part of Letters Patent No. 541,291, dated June 18, 1895.

Application filed June 1, 1394. Serial No. 513,206. (No mode -J) To asZZ whom it may concern.-

Be it known that I, EDUARD SALZER, a citizen of the United States, residing in La Porte, in the county of La Porte and State of Indiaua, have invented a new and useful Improvement in Valve-Gear for Steam-Engines, of which the following is a specification.

This invention relates to a compact, cheap and simple device applied to the crank shaft of a reciprocating steam engine and connected to the valve operating eccentric for changing the throw of the eccentric to reverse the operationof the valves.

The nature of the improvement will be fully understood from the subjoined description and the accompanying drawings, in which Figure l is a diagrammatic plan View of a steam-engine provided with my invention. Fig. 2 is a side elevation of the reversing apparatus. This and the following figures are on a larger scale than Fig. 1. Fig. 3 is asection on the line 3 3 of Fig. 2, looking in the direction to which the arrow points. Fig. 4 is a side view similar to Fig. 2, but showing the reversing-gear in a different position with the throw of the eccentric reversed. Fig. 5 is a section on the line 5 5 of Fig. 4, looking in the direction to which the arrow points. Fig. 6 is a longitudinal vertical section taken on the line 6 6, indicated in Fig. 5.

Like letters of reference indicate like parts throughout all the figures' In said drawings A is the crank shaft. B is the valve operating eccentric which is loosely mounted on the shaft. Rigidly connected tothe eccentric or made one therewith is the stop plate B havingthe segmental stop projection B Adjacent to this stop plate and keyed to the shaft A is the opposing stop plate 0 which is perforated with the circular slot 0. A projection b from the stop plate B passes through this slot and is secured to the face plate B which face plate carries the projecting arm 13. It will be seen that the eccentric B, the stop plate B, the stop B the face plate B and the projection B are all rigidly connected together. The face plate B and projection B may be readily and quickly detached.

b is a bolt connecting the projection B and face plate B D is a hollow sleeve fitted at one end with agrooved collar E to receive the forks of a reversinglevere. Shownin Fig.1. The sleeve D is splined or keyed to the shaft A by the spline a in such manner that said sleeve will revolve with the shaft A but may be moved longitudinally thereon. To afford a better bearing for the sleeve I prefer to extend from the stop 0 a tubular projection C which extends into the sleeve D, enlarges the driving shaft A and affords a ready means of fixing the stop plate 0 rigidly to said shaft.

In the sleeve D is cut a spiral slot or groove D. I prefer to cut this slot entirely through the sleeve in order to facilitate lubrication. Entering this slot from the projection B is a pin d. When the apparatus is in the position indicated at Fig. 2, the sleeve D maybe moved by the reversing lever e engaging the collar E into the position indicated at Fig. 4: while the shaftA is revolving and the engine in motion. The effect of thus moving the sleeve will be to reverse the position of the eccentric; that is to say, the spiral slot D by eugaging the pin (1, will carry the projection B around with a rotary movement; and the projection B will impart to the face plate B the stop plate B and the eccentric B the same rotary advance, which rotary advance will be checked or stopped by reason of the stop B coming into contact with the stop B ,'t.he latter on the plate 0. The effect of reversing the position of the eccentric, moving it from one to the other side of the shaftis, as will be understood, to reverse the throw of the eccentric and the position of the valves and consequently reverse the motion of the engine.

It will he noticed that the construction of this reversing apparatus is exceedingly simple. It is compact; easily lubricated at all parts; can be readily applied to reciprocating engines of almost every form; puts no strain upon the engine; and is exceedingly strong and durable.

the crank shaft A, the eccentric B loosely mounted on said shaft, stop plate B rigidly connected to the eccentric, the stop plateG keyed to the shaft, the projection 13*, the face plate B connected to the stop plate B, the arm B projecting from the face plate E the hollow sliding sleeve D splined to theshaft andhavi'ng the-spiral slot D, thepin dand means for sliding the sleeve, substantially as specified.

2. The valve reversing gear for reciprocating steam engines comprising in combination an eccentric looselymounted on the crankshaft, a face plate secured rigidly to the eccentric, a projection extending from the face plate longitudinal with the shaft and carrying a pin, a hollow sleeve splined to the shaft EDUARD SALZER.

JOHN W. RUSSERT,

\Vitnesses:

WILLIAM WURSTER.

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