US168803A - Improvement in steam-engines - Google Patents

Description

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Steam-Engine.

Patented Oct. 11,1875.

I S I I l I l l I I l l l I I l I i VIEW TOR Attorneys new, WASHPNGTQ'L 0 cf UNITED STATES PATENT OFFICE.

GEORGE B. STEVENSON, OF UPPER SANDUSKY, OHIO.

IMPROVEMENT IN STEAM-ENGINES.

Specification forming part of Letters Patent No. 168,803, dated October 11, 1875 application filed August 21, 1875.

To all whom it may concern:

Be it known that I, GEORGE B. STEVEN- soN, of Upper Sandusky, in the county of Wyandot and State of Ohio, have invented a new and valuable Improvement in Steam-Engines; and I dohereby declare that the follow-- ing isa full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings making a part of this specification, and to the letters and figures of reference marked thereon.

Figure I of the drawings is a representation of a longitudinal vertical sectionof my steamengine, and Fig.2 is a transverse vertical sectional view of the same. Fig.3 is a transverse vertical sectional view of the slides and their attachments.

This inventionhas relation to the construction of steam-engines, whereby I obtain light ness and strength, at the same time cheapness and solidity and the novelty consists in the construction of the parts, as will be hereinafter more fully set forth.

In the annexed drawings, A A designate the two legs which constitute my engine-bed, which legs are connected together by an arch, B. This bed is made up of flanges and a web, preferably cast entire. Upon this bed is formed a horizontal cylinder,- G, terminating at one end in a head, D, having a flange, a, and a stuflingbox, b, which latterreceives through it a piston-rod, E. This piston-rod has a piston, F, on one end, which works in a steam-cylinder, G, bolted by its flange c to the flange a of the cylinder 0, as shown in Fig. 1. By these means the head D of the cylinder 0 serves as the head for one of the ends of the steam-cylinder G; J is the cross-head on the piston-rod, constructed with cars 01 and a wristpin, f, for the pitman-rod. This cross-head J is also constructed with square sockets z in its upper and lower sides, which receive square shanks e 6 formed on two slides, g g, the faces of which are convex transversely,as shown in Fig. 2, for the purpose of fitting the concave surfaces of slideways h it formed on the inside of the cylinder 0. These ways h h extend the full length of the traverse of the cross-head,

and in cross-section their surfaces are concentric to the axis of the piston-rod and cylinder 0. This concentricity of the surfaces of the slideways and slides allows the cross-head to be adj ust-ed about its longitudinal axis, so that proper connections of the pitman-rod with the cross-head and crank can be conveniently made and all binding of the parts prevented.

In order to compensate for the wear of the slides and slideways I make the slides adj ustable by means of set-screws s s, which are ac: cessible by means of an opening through the cylinder 0. The open end of the cylinder (J terminates in a receiver for the brasses, which afford journal-bearings for the driven shaft.

cylinder 0, having concave slideways h, substantially as and for the purpose set forth.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

GEORGE B. STEVENSON. Witnesses:

R. L. STEVENSON, S. S. PETTIT.

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