US442462A

US442462A - Philip m

Info

Publication number: US442462A
Authority: US
Publication date: 1890-12-09
Anticipated expiration: 1907-12-09

Description

(No Model.)

P. M. SHARPLES.

REACTION MOTOR GOVERNOR.

No. 442,462. Patented Dec. 9, 1890.

ATTORNEY mm, wwummon n c UNITED STATES PATENT OFFICE.

PHILIP M. SHARPLES, OF \VEST CHESTER, PENNSYLVANIA.

REACTION-MOTOR GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 442,462, dated December 9, 1890.

Application filed December 12, 1887. Renewed October 14, 1890. Serial No. 368,072. (No model.)

.To all whom it may concern:

Be it known that I, PHILIP M. SHARPLES, a citizen of the United States, residing at West Chester, in the county of Chester and State of Pennsylvania, have invented certain new and useful Improvements in Reaction-Motor Governors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates particularly to means for regulating the speed of motors constructed on the reaction principle, best illustrated in the so-called Barkers mill. The centrifugal force developed is utilized for this purpose by combining a movable valve or valves with the motor in such a manner that their tendency, when the latter is in motion, will be to close the disch arge-outlets for the steam or other motive force. Means are also provided for counteracting this tendency, so regulating it that approximately any desired speed may be automatically maintained notwithstanding variations in the work orin the force applied.

Figure 1 is an elevation, and Fig. 2a plan, partly in section, of a reaction-motor with my governor attached. Fig. 3 shows in plan and elevation the end of one arm of such a motor, having attached a modified form of my governor.

A represents the body of the motor with the spindle B secured to it. The bottom A is supported by and adapted to revolve upon the head of the supply-pipe C, and has an inlet A which is represented in the drawings as branching off through two oppositely-curved arms A so as to terminate in two dischargeoutlets A though it is evident that one only might be used. These arms are formed with radial cylindrical ends A, with chambers A bored toward the center and intersecting the outlet-passages. Cylindrical valves adapted to move smoothly and easily in said chamber are formed with a main body D, which extends below the outlet-passage, a reduced diameter D, to allow the free flow of the steam, a collar D and an extended stem. A spiral as to permit the cross-bar D of the valve r913;

turn in close proximity to the curved face A of the motor-arms. ings D extend from the yoke, with projections D which bear against the ends of suitable springs. The latter serve to counteract the centrifugal force, which tends to throw the cross-bars of the valves in front of the outlets.

The reaction-motors, to which my invention is especially applicable, are adapted to run at a very high speed, and a very slight variation in the amount of work or in the pressure of steam or other motive force supplied may make it vary to such an extent as to seriously interfere with good w0rk,and unless close attention is given to the regulation of the inlet- 'alve the machine may run away and cause considerable damage to itself, if not to its surroundings. These objections it is intended to overcome by making the regulation of the speed automatic. The pressure of the spring acts as a centripetal force, pushing the valve toward the center of rotatiointhus permitting the steam or other motive force when first. admitted to freely escape through the discharge-outlets, thus causing it to revolve. As the speed increases, the centrifugal force tends to throw the valve away from the center. \Vhen this force becomes greater than the pressure of the spring, the valve begins to move, and the outlet for the steam is partly cut oif until the speed is reduced to the rate determined by the amount of pressure put on the spring.

It will be observed that the valve effects the regulation of the outlet directly by its centrifugal movement held in check by a centripetal force acting directly upon it. The moviu g weight being in consequence very light the inertia is so little as to present no obstacle to fine adjustment and quick response to a variation in speed.

Having thus described my invention, I desire to secure the following claims thereon:

1. The combination, with a reaction-motor havinga discharge-outlet, of a governor-valve actuated directly by its centrifugal force and thereby adapted to close said outlet by a means of regulating the movement of said valve, substantially as and for the purpose set forth.

2. The combination, with a reaction-motor having a discharge-outlet with intersecting circular chamber, of a cylindrical valve adapted to move in said chamber, and adjustable springs to regulate the movement, substantially as set forth.

3. The combination, with a reaction-motor