US27786A - Ormrod - Google Patents

Description

UNITED sTATEs PATENT oEEioE.

ORMROD C. EVANS, OF NEXV YORK, N. Y.

STEAM-ENGINE.

Specification of Letters Patent No. 27,786, dated April 10, 1860.

To all whom it may concern.'

Be it known that I, ORMROD C. EVANS, of New York city, county and State, have invented certain novel and useful Improvements in the Mode of Operating Shafting for Steam-Engines; and I hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon, which letters constitute and form a part of the specification.

To enable the public to fully understand the nature of my aforesaid invention and those skilled in the mechanic arts to construct it and operate the same I will describe it as follows.

The ligure is a perspective drawing of a stationary steam engine having my improvements attached as shown at letters (A, A, A2, A3,) which are a series of rule joints so arranged that they form the connection between the piston rod by means of the bridles (F, F,) when operated or moved forward by the piston in cylinder (J.)

(1),) is the cross head which supports the piston rod (N, N, N,) and travels back and forth with the same. This cross head is also provided with movable arms which are supplied with vertical pins (e, e,) at the outer ends thereof these pins move backward and forward in the horizontal curved slits in plates (M, M,) which also serve as slide-plates upon which the crosshead (D,) travels.

The Oflice of the springs (S, S,) is to force the arms (e, e,) toward the outer curve of the slits next to the inner edges of the slide plates (M, M,) by which means the concussion is entirely overcome if the springs are sufficiently strong.

((1,) is an adjustable compound lever employed to operate the valve in steam chest (K,) by means of a horizontal plate provided with a catch or lip at each end thereof, this plate is fastened to the cross head (D,) so that the catches or lips strike the lower end of the lever (C,) as the piston is moved in either direction.

The nature of my invention consists in converting reciprocating into rotary motion and applying the same to stationary steam engines by means of a cam operated by a jointed piston rod which rod presses the cam upon the outer face of the driving wheel (G,) in its (the piston rods) backward motion, while the cam (B,) is detached from the face of wheel (Gr,) during the forward movement of the piston rod and cam.

The superiority of my mode of operating a shaft of a stationary steam engine is that it imparts the greatest amount of available power when the cam is in contact with the face or outer periphery of the driving wheel at the same time the reaction of the piston raises the cam so that the wheel and shaft continue their forward rotatory course without obstruction.

The novelty consists in constructing a iexible or jointed piston rod (A, A,) at the outer end of which is attached an eccentric cam (13,) which is so held in a working position upon the smooth face of a driving wheel (G,) by means of movable bridles (F, F,) attached to the main shaft (I,) and cam (13,) that when the power is applied and the piston is moved suddenly forward the cam takes hold on the face of the driving wheel (G,) drawing it forward also. And when the piston is moved back the cam is released from contact with the driving wheel allowing it, the wheel, to continue its motion without hindrance from the cam connection or power setting it in m0- tion.

Attached to the main shaft (as in ordinary engines) is a balance wheel which in weight is intended to be proportioned to the amount of power employed and the work to be done, the effect of which is, when set lin motion by my attachment that the balance wheel and shaft accumulate motion more readily than from the ordinary engine crank attachment, and if the jointed portion of the piston rod is constructed of sufficient length to admit the cam to travel one-fifth, one-fourth, or one-third, the periphery of the driving Wheel (when a suiieient amount (S, S,) and Compound lever (C) in combiof power is applied) a free and regular monation, constructed and arranged substan- 10 tion of the main shaft is obtained. tially as described and for the purpose set Therefore what I claim as novel and useforth and shown in the drawings. 5 ful, and desire to secure by Letters Patent ORMROD C. EVANS.

of the United States is- Witnesses:

The 0am (B,) the rule joints (A, A', A2, JAMES P. MGLEAN, A3,) bridles (F, F,) arms (e, 6,) springs Gr. S. GILLCHREST.

Images