US48904A - Improvement in valve-gears for oscillating engines - Google Patents

Description

UNITED STATES PATENT OEEICE.

HENRY CARTER, OF PORTLAND, MAINE.

IMPROVEMENT IN VALVE-GEARS FOR OSCILLATING YENGINES.

Specication forming part of Letters Patent No. 48,904, dated July 25, 1865.

To all whom it may concern:

Be itfknown that I, HENY T. CARTER, of Portland, Cumberland county, State of Maine, have invented anew and Improved Valve-G ear for Oscillating Steam-Engines; and Ido hereby declare that thefollowing is a full, clear, and exactdescription thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specication, in which- Figure 1 is a sectional side elevation of this invention; Fig. 2, a plan or top view of the same.

Similar letters of reference indicate like parts.

Thisinvention consists in the arrangement of a stationary link, in combination with an arm extending from the valve-stem of an oscillating steam-engine, in such a manner that by the combined effect of this stationary link and the oscillating motion of thecylinder the requisite reciprocating motion is imparted to the valve-stem and the valve is changed at the proper intervals.

A represents an ordinary steam-cylinder, which is hung on truunions B, that have their bearings in suitable standards, C C', rising from the bed-plate D, or which are otherwise arranged in such a manner that the cylinder is free to oscillate in either direction. The piston-rod E connects directly to the wrist-pin of the crank F, which is mounted on the end ot' the ily-wheel shaft Gr in the usual manner, and the reciprocating motion of the piston is converted into a continuous rotary motion of the fly-wheel.

Secured to the side of the cylinder next to one of the standards, C, is the valve-chest H,

A and the stem I of the Valve extends up through a lip projecting from the flange at the end ot' the cylinder, as clearly shown in the drawings. By this arrangement the valve-stem is guided in its np-and-down movement and prevented from being bent or from binding when the engine is in motion. From said valve-stein eX- tends an arm,J, provided with a stud,a,which extends into a slotted link, b, as shown particularly in Fig. l. This link is rigidly attached to the standard C, and the slot in the same may be rectilinear or curved; but it must be eccentric in relation to the truunions on which the cylinder oscillates. As the cylinder oscillates on its .truunions the stud a ,is carried in and out in the slotted link, and vby the eccentric shape ot' said slot in relation to the center of motion of the cylinder the valve is caused to assume a reciprocating motion. It will be easily understood by practical engineers how the slotted link has to be placed in order to cause' the requisite change in the position of the valve at either end ot' the stroke of the piston.

The simplicity of this valve-gear is unsurpassed. It can be readily applied to oscillating engines of any desired description, whether the cylinder oscillates on a horizontal or on a vertical axis, and if the link is once properly adjusted the valve-gear will require no further adjustment.

I cla-im as new and desire to secure by Let ters Patent- The arrangement ot' the stationary slotted

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