US82874A

US82874A - randall

Info

Publication number: US82874A
Authority: US
Publication date: 1868-10-06
Anticipated expiration: 1885-10-06

Description

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JDHN H. RANDALL AND CHARLES n. RANDALL, or BOSTON, MASSACHUSETTS Laim Panam. "82,874, dated caoba c, 186s,

IMPROVEMENT IN STEAM-ENGINE GOVERNORS.

TO ALLWHOM IT MAY CONCERN: Y

Be it known that we, JOHN H. RANDALL and CHARLES E. RANDALL, both of' Boston, in the county of Suffolk, and State of Massachusetts, have invented a new and improved Hydraulic Regulator for Steam-Engines, Water-Wheeis, &c., of which the following is aV full, clear, and exact description, reference being had to the accompanying drawing, making a'part of this specification, and representing a vertical longitudinal section of the regulator. A A

The object of our invention is to produce a simple, inexpensive, and efficient regulator for steam-engines, water-wheels, dto., but which is more particularly adapted for marine engines.

' Another object is to simplify the transmission of motion, so as to operate the regulator directly from the main moving parts ofthe engine, without interpositon of pulleys, belts, gears, and shaftings.

And our nventionconsists in the employment bf fluids for operating the throttle-valve, cut-oi, or'shut, and

for regulating the speed of engines or other motors by means of raisingthe fluid from a tank by a double-acting force-pump, and connecting the delivery-pipe with a second cylinder, which is provided with a piston and pistonrod, the latter being attached to the lever of a throttle-valve.

A waste-pipe is attached to the second cylinder, at a point below the lowest position'of the piston, for the purpose of discharging the duid, through a cock, back into the tank orreservoir.

My invention consists, further, in the arrangement cfa cock with the waste-pipe, at s uch point between the cylinder and the tank, for the purpose of increasing'ior decreasing the flow of the uid through the same; the cock being provided with a handle, to bel operated according to the option of the attendant.

Referring to the drawings, a represents a plate or part ofthe frame-of the engine, to which is attached the pump-cylinder Zz, which is provided iwith the piston c and piston-rod d d, extending through the heads of the cylinder, and which may be attached by an arm, directly to the piston-rod of a steam-engine, and thus give the piston of the pump the full stroke of the engine, or it may be attached to an eccentric on the main shaft,and then give the piston any desired length of stroke. i g

To the lower portion of the pump-cylinder b, and near its heads, are attached the receiving-valvese e and pipesff. The endf extends into a tank or reservoir iilled'with Huid.

At the upper portion ofthe pump-cylinder b, and opposite to the receiving-valves e e, are "placed the delivery-valves g'g, connecting, by means ofthe delivery-pipes 7th L, the cylinder b with the second cylinder z', which latter is provided with the piston ,7c and piston-rod c, and communicates motion, by means of lever` l, to the throttle-valve m. l

To the lower portion of the cylinder'i is attached the waste-pipe n, with the cock p, and'which conducts the iluid'back into the tank.

rllhe operation of this regulator is as follows i The action ofthe pump, when the engine is in motion, forces the iluid constantly up into the second cylinder z', and also into the Waste-.pipe n, which latter is provided with the cock p. The latter is-opened so far only as to allow a quantity of iiuid toA pass through, and which has been previously raised by the pump at a certain speed of the engine, but as soon as this speed increases, more'uid will be forced into the cylinder z' than can readily escape through the cockp, and consequently the piston k in said cylinder will be raised, operating onthe lever Z, and closingl the throttle-valve, until thespeed of the engine is thus reduced to the desired velocity.

, To increase the speed of the engine, it is simply required to turn the cock p, so as to increase the opening through it, and thus facilitate the flow ofthe Huid, and 'uz'ce versa.

' Thus it will be seen that any-sudden change inthe speed, as on marine engines, produces immediately the required setting ofthe throttle-vnlve'orv cut-off, without danger of slipping belts or breaking cogs. p

The iluid used may be water, alcohol, oils', air, mercury, or any other suitable substance, as the ui'd is used over and over again.

To secure an even and exact working of the regulator, the parts should be so arranged as t0 raise equal quantities through the receiving and delivery-valves respectively, and, when' ths properly proportioned, the piston 7c will be at rest until a change in speed of the engine occurs.

What we claim as our invention', end desire to secure by Letters Patent, is-' 1. The combination of the double-acting force-pump with the pipe h", cylinder i, and with the throttlevalve m and waste-pipe n, as herein specified.

2. The arrangement of the cock p with the waste-pipe h, cylinder z', pipe 71,", and double-acting force-pump,

substantially as herein set forth.

In testimony whereof, we have signed our names to this specification in the presence of two subscribing witnesses.

' J. H. RANDALL, C. E. RANDALL.

Witnesses:

J. H. CorrERnAeEN, J.V H. ADAMS.