US154405A - Improvement in steam-engine governors - Google Patents

Description

UNITED 5 STATES? AJOHNJ). LYNDE, OF PHILADELPHIA, PENNSYLVANIA.

IMPRQVEMENT INl STEAlVlIl-KENGINE GOVERNORS.

Y Specification forming part of Letters Patent No. 154,405, dated August 25, 1874; application led f April 3o, 1574.

To all whom it may concern:

Beit known that I, JOHN D.LYNDE, of Philadelphia, State of Pennsylvania, have invented "new and useful Improvements in Steam-Enengines requiring suddenly a large amount of steam. Heretofore, governors have been constructed to operate according to the speed of the engine, so that, in cases where the vload is very irregular and the work being done requiring regular speed, the difference of speed in light and heavy work has been 1to0 great,

causing trouble, loss, and damage. Another difficulty vhas been experienced in some kinds of engines, especially such as are constructed with puppet-valves, taking the steam so,v suddenly (as the valves are jerked open withcams) the governor-valve receives a` sudden impetus from thesteam, as, with great velocity, it rushes into the cylinder, causing a jerk on the rods and works of the governor, causing unwonted detriment and wear; also, the steam driving by and above and around the valve,

in many eases unbalancing it.

Referring to the drawings, Figures 1 and 2 are partial sectional views of this invention.

It is found that, in many manufactories Where various kinds of work are being done by one engine, and where the load on the engine is extremely unequal, it has been `quite an impossibility to keep a regular speed at all times. Usually, the amount of steam permitted to go to the cylinder rhas been governed by the speed of the engine itself, so that when large changes of load occur too much change of speed is. necessary before the steam will be added or retarded, as required. To meet this most serious difficulty another power has been brought to bear to assist the governor. The actual load of the engine is used to assist in supplying steam so as to keep up its regular speed. Figs. 1 and 2 show two forms of apparatus for the purpose, as applied to a governor; Fig 3, another form, which is similarly applied as that in Fig. l.

A is the body or valve-chamber of the governor; B, the valve. C and C are cylinders, in which is fitted the grooved piston D. E, E', and E .are levers which, when forced upward, assist the governor`in lifting the steamvalve in chamber A; F, F', and-F, springs to regulate the pressure exerted by the lever. G and G show a section of the fork of lever of governor by which the valve is lifted, and underV which lever lever E acts, lifting upward transversely. 1n each Vof the three ways the spring is compressed differentlyin Fig. 1, by screwing down `the nut at top; in Fig. 2, byscrewing up the nut on which it rests at bottom; in Fig. 3, by screwing down the nuts on cross-head H. The power used to operate the described levers E, E', and E is the pressure of steam in the steam-chest and cylinder, which varies with the changes of load. When the construction used is like exhibits Figs. 2 and 3, the pressure is admitted under the piston D in Fig. 2. It is taken from the top of the outer chamber of the governor, (in which the pressure is the same as in the steam-chest,) through passage M. In Fig. 3 the pressure is taken from the steam-chest or from governor-chamber, as in Fig. 1. In Fig. 1, instead of a cylinder, a vconstruction is used similar to a steam damper-regulator, in which the piston J stands on a disk of rubber, K, under which the pressure is admitted from steamchest by pp M, or from side of chamber A, by a similar pipe as M. The governor is set so that when the engine is light it will run the proper speed. The spring F being tightened down so as to just prevent the lever E from having any `effect on thelever GJ, as soon as load is put on'the engine the pressure in the cylinder will be increased, which will be instantly felt under the .piston J, and, pressing up lever E, will proportionately assist the revolving weights of the governor to depress and raise the valve to supply the PATENT i OFFICE.

"necessary increase of steam Without-pereep tible change of speed of engine. The three plans of using the said power are shown, Fig. 2 being built with the governor, While Figs. l and 3 may be attached to va governor already in operation. The steam which passes upward, through orl by the valve B, must b e turned downward,and,r rushing into the cham# ber Z', the force of the velocity is added to the pressure, which causes a momentary slightly in-'l creased pressure in the chamber "Z", and, react= in g on the valve, causes thejerk downward described. To obviate the said jerk, the adjustable disk U is provided, Fig. 1,W11ich is set so as to vreceive `on its underside enough of the force from said-velocity to balance the reaction, and the valve remains practically balanced.

Having thus described the nature and object of my said invention, what Iclaim therein as new, and desire'to secure rby Letters Patent, is-

The combination of the pipe M, disk K, piston J, lever E, adjustable spring F, valverod O', disk U, valve B, and chamber A, substantially as and for the purpose herein set JOHN n. LYNDE.

Witnesses:

ALEXANDER FOGEL, J oHN H. SEBOLD.

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