US23519A

US23519A - of brand ywine

Info

Publication number: US23519A
Authority: US
Publication date: 1859-04-05
Anticipated expiration: 1876-04-05

Description

UNITED STATES PATENT OFFICE.

G. D'. VEST, OF BRANDYVINE, DELAVARE, ASSIGNOR TO P. W'. NEEFUS, OF NEVv YORK, N. Y.

VALVE-MOTION OF OSCILLATING STEAM-ENGINES.

Specification of Letters Patent No. 23,519, dated April 5, 1859'.

To all whom it may concern.'

Be it known that I, GEORGE I). IVEST, of Brandywine Hundred, Newcastle county, State of Delaware, have invented a new 'Talve-lniotion for Oscillating Engines; and I do hereby declare that the following is a full and exact description thereof, reference being` had to the accompanying drawings and to the letters of reference marked thereon.

The drawings represent elevations of an oscillating cylinder and its crank in different positions.

Figure l, shows the cylinder and crank at the center and my improved attachment in such a position, as to give no mot-ion to the valves. Fig. 2 represents cylinder and crank in two positions, and my attachment in such a position, as to give the crank a motion in direction of the arrow. Fig. 3, shows the engine with an attachment for a lead. to the valves, and my valve motion in a position to give the crank a reversed motion. Fig. 4:, is a detached view of rock .shaft and its crankarms. In all these tigures the frame of the engine is omitted.

The nature of my invention consists in providing an arch and an intermediate lever, to produce a quick and sudden motion in the valves of the oscillating engine.

To enable others skilled in the art to make and use my invention I will proceed to describe its construction and operation.

A. represents an oscillating cylinder with its center of vibration at a.

b b are the valves. The stem of these valves is hinged to the upper end of a lever c on the side of the cylinder a which lever c turns on a stud c fixed to cylinder c. The lower end of this lever c extends downward below the fulcrum c to the center line of the cylinder a, where it enters with a pin the slot of an arch d. This arch (Z turns on a fulcrum d', and is made concentral with the center of vibration of cylinder c unless it is placed eccentric by lever e and connecting rod f. If arch (l is placed in a concentral position with c by lever c as shown in Fig. l7 it is evident7 it will impart no motion to the valves b and consequently the engine will stop. But if arch Z is placed in an eccentric position by means of lever e F the engine will turn in direction of arrow, and the position of cylinder c shown in red lines in the same figure illustrates how fastthe opening of the ports take place as the crank has traveled a short distance only. If no lead were required it would be suiiicient to give arch d a stationary fulcrum at cl in the frame of the engine, butin order to give the valves a lead I propose to apply the well known device of 2 eccentrics and an arch as shown in Fig. 3, and connect this arrangement with arch d, by a rock-shaft g which has its bearing in some convenient part of the f 'ame and contains a crank arm /i and z' on each end. To the upper end of arm /L I attach the fulcrum of arch CZ and the upper end of arm z' is provided with a pin 7c, which enters the slot of arch Z.

Having thus fully described my invention what I claim therein and desire to secure by Letters Patent is- The combination of arch CZ and lever c for the purpose and in the manner substantially as set forth.

GEORGE D. IVEST. Titnesses ALB H. HAAR, WM. PALMER.