US533656A - Nathaniel lombard - Google Patents

Description

Patented Feb. 5, 1895.

lIL'x/E P0; or. $53722. ZomZarcZ 2 Sheets Sheet 2.

M0 ifindelu) N. LOMBARD. SPEED BEGULATQR.

Patept Feb. 5, 1895.

5 i, 6 EM 15 w 7 a, citizen of the United States, residing at 1305- UNITED STATES PATENT FfliLEe NATHANIEL LOM'BARD, 0F BOSTON, MASSACHUSETTS, ASSIGNOR TO THE LOMBARD \VATER WE IEEL GOVERNOR COMPANY, OF

SAME PLACE.

SPEED-REGU LATOR.

srncmcanon forming part of Letters Patent No. 533, 56. dated February 5, 1 see.

Application filed August 14. 1894 stain No. 520,268. (No model.)

To al l whom it may concern:

Be it known that I, NATHKNIEL LOMBARD,

ton, in the, county of Suffolk and State of Mas sachnsetts, have invented certain new and useful Improvements in Speed -Regnlators;

and} do hereby declare the iollowing to be a foil, clear, and exact description of the invention, such as will enable others skilled in the art-to which fit appertains'to make'and use the same, reference being had .to' the accompanying drawings, and to figures of reference marked -thereon, vhi'ch form a part of this.

. specification.

erated by centrifugal action upon revolving weights. ltisn v'vell known fact that in regn-- 'lators'o; this class there is a tendency to continned changes due-to various agencies, as the aznount'of .work, steam pressure, or other mctdentalcanses As these changes require "more or less motive-power in the form of regulator causes the valve to open,- and this latter in lieu of being opened a certain amount and then-stopped continues to open. The resalt is that the speed increase's'until the normal is not only reached, butver'y twitches-- cceded, when the weightsfagain operate to partially close the valve; and perhaps reduce the speed .too much. However this may be, the general effects of thegxresent and most approved speed regnlatot's are to keep the apparatus fluctuating constantly. This tends to maintain the speed not at a steady-normal rate, but either. too fast or too slow;

v The purpose and object of my invention is toendeavor to preserve the speed at a nor mal, apd'ivh'en the main valve which admits- -the actuating medium is shifted by the action [of the vveight-s, to prodncc a. change, certain This invention relates to improvements inspeed regnlators' particnlarly that class op mechanism is put into activity to operates secondary valve, which checks the movement of the main valve before the Enli elfects of the change in the said main valve upon the motion is fully felt; hence excessive variations cannot take place. If, as before-instanced, the speed =is'below the normal the weight opens the main valve which is very soon stopped; the full amount of gate demanded by the balls not-being used. If this is not suflicient the weightsagain operate and these acts are repeated, the main valve which admits-the power, as steam or wateibeing success'ively changed until the desired degree of opening or closing is attained.

My present improvements relater to that, class of speed regulators in whichthe main gate or valve supplying the medium, as steam, 1

water or gas, is held inpcsition or changed,

as circumstances may reqni re, by means of a piston adapted to reciprocate within a fluidfilled cylinder, the finid in the latter being allowed to circulate. from end to -end,-and by such circulation to permit movements of the piston." This circulation is-regulated by a means of a secondary valve under the control of the speed regulator Weights, and nor molly said valve is closed over both inlet and outlet ports by which means the main gateis held locked fast and prevented from moving.

.My invcntionis embodied as beforeprd,

mised in mcchan ism which operates to. bring,

the secondary valve or that which regulates the circulation of liquid within the closed cylinder to a fixed predetermined position and so maintains it. This secondary valvehowever is frecio heshifted by the action of the regulator weights, and snfh'shifts or changescause-the piston to move withinthe cylinder;

bid: the mechanism Whichl consider'as novel a is intended to return the secondary valve at once or very shortly thereafter to its normal or closed position'after it has heeh shifted 0; opened by the regulator weights, andalso to allow return of the weights to their proper place, and which departure necessitated more or less movement oi the main valve, without.

disturbingthe position of thesecondaryvalve.

In brief this mechanism comprises a station IQO ary post adapted to rock and to whichis at tached two oppositely disposed'rods, one

equipped with a piston contained within a brake cylinder for air or fluid. The other rod terminates in a raolnwhich engages a pinion fast aha-ct the secondary valve rod. Thus this valve is adapted to be opened by the regulator weights, while the travel of the pisin the main cylinder serves toreciprocate a tapered bar, which rocks a bcllcrank lever andtilts the post to close the secondary valve. clined from the vertical is intended to allow the weights to shift their position commensurate with the change in the speed due to the movement of the secondary valve without changing the aid valve from its normal closed position.

The other peculiar features and the method of operating the various parts which LlO'Op crate to produce the object to he attained under my invention will he hereinafter fully set forth and explained.

The drawings represent in Figure l a lon vitndinal sectional elevation oi. aspeed regulator equipped with mechanism embodying myinvemion. Fig. 2 is a plan. Fig. 3 isavertical central sectional elevation inv part of the regulator proper. and secondary valvestcm, and transversely of the main cylinder. Fig. i is an enlarged view of the rocking post and the secondary cylinder which serves as the resistance to the movement of said post.

in said drawings I have shown a closed cylinder 2 llquid fillod and adapted to contain a piston 3 which is capable of movement therein only as the liquid circulates from one side of said piston to the other; This is offectedby means of two pipes 4. 4'. which connect with a valve 5 termed the secondary valve. I (5 and contains the feed parts 7.7. respectively for the pipes 4.4:. as likewise a common dis charge 8. rod interconnects the piston with the main gate or valve, not shown, which admits the active medium as steam, water or gas to the prime motor.

A belt 12 to the pulley 13 serves to rotate a pair of centrifugal weights or balls 14. These latter are supported on levers 15'. 15'. which are mounted upon a fixed upright 16. Rotation of the balls is created by means of the toothed wheel 17 which meshes with another 18 affixed to the lower end of a sleeve l9 secured to the upright. A flanged tube20 1s placed within the upright standard and is constructed toreciprocate, but not to rotate The time during-. which the post is in This valve is located within a casing,

The supply pipe is at- 9, while 2..

position oi the balls the rotation of the s cations likewise car rod 24; and serve to in part, according to the speed; but whet in the cylinder 2 ti and such movement tion of the valve-Ste:

doe to varyingspeed in eeve 19. Such reciproy the valve 5 and valve pen the valve wholly or the amount of change in circulation takes place no piston ii is advanced is accompanied by rota i. This latter actscrves to close the seconda -y valve without further changein the position of the halls. immediately after such closing of this valve the balls begin to move again in order to resume the 80 position they held prior to this chance in the gate which has just been cifeoted, this more meat of the balls being occasioned by. the prime motor n )w influenced by this change of gate. ,To pr vent the secondary valve heing actuated by such movement of the halls and to retain the valve closed at times and again to allow it to he opened at other times is one of the important features of my inven- 'tion which lshall now proceedto describe.

To effect rotation of the valve stem J l at proper times and to cause the operating niechanisin to quickly close the valve 1 have employed the following group of instrumentali tics: Upon the top of the pipe 4: for compactness of form is secured a hollow block or pedestal 25 which is capped to receive the base of a rocking post 20. The manner of uniting these two pieces is very simple and consists in the present instance of two trans verse pins 27, which enter correspondi g grooves 28 in the base of thcpost, while centrally is a pivotal rod .29 which is pendent from the base but within the pedestal and is spring-actuated. The tension of this spring is such that the'postalways tends to assume the vertical whichcvorwayit is inclinedfrom a normal. At the free or top end of this rock-- ing post is positioned a bar 30 which interconnects said post with atoothed rack 31 suitably supported in a horizontal-guide block 32, while a pinion 34 is afiixod about the valvestem 24. This pinion is of considerable length, see Fig. 3, in order that the valve and valverod may he raised or lowered,when the valve r is given longitudinal movement without cans ing the rack and pinion to disengage. A hand lever 35 may be attached in order that manual operation of the secondary valve may be effected if circumstances require. Furthermore to'cause the rotation of the valve-stem which results in sliding of the secondary valve to close and to render this efct directly dependent upon the travel of the piston 23, the following elements are provided: In parallel ism with the piston rod 10 andattached there to and moving with it is a tapered bar which serves to oscillate a bell lever 37inctened to the cylinder 2. One arm of this is equipped with an antitric'tion roller which cooperates with a similar roller on the cylinder, while the tapered bar 3% slides therebe-' tween. A spring 48 maintains constant con i tact between the bell lever an the bar in orceases d'er to render the latter active should it move in either direction.' The upper end of the opposite bell-lever arm'is'ipivotally fastened to a cylinder 38 which serves as a brake or retarder and prevents the too quick return of the rocking post to the vertical, this return being varied by means of liquid or air confined within the cylinder 38. From the rocking post extends a rod 40 which passes through the cylinder, while a piston 41 affixed upon said rod. is permitted movement within the Yspective of the variable positions of the balls.

Hence, as before stated, the secondary valve 'isto be opened by the balls to advance the pisten 3 one ,way or the other, but this shift .of

the valve is but temporary for the reasonthat.

the very act of moving said piston 3 serves to operate to close the valve quickly, but likewise causes said valve to remain closed during subsequent movement and'return of the balls to theirproper position, and which return has been produced by the change in themain .gate just, effected. With these promises, it will be seen that the piston 3 isno'w held stationary, and the maingate (not; shown) at the end of the rod 10 positively locked because the valve 5 is shut and no circulation occurs in the cylinderZ. Upon this assumption and that the various parts are now operating normally, when an extra burden is assumed by the prime motor'this calls for were main, gate. At this moment the ball drop slightly ahd raise the flanged sleeve-l9,-

see Fig. 3, carrying up the valve-stem and valve 5 which now allows fluid to enter the pipe 4 and advances the piston 3 in direction of arrow 1 to open the main gate; but to prevent excessive'results from this opening of the.

main gate, the tapered bar 36 is withdrawn from beneath the bell-lever '37, when the.

spring 48-rocks said-lever to the-rightand simultaneously tilts the post 26 likewise to the right since the rapid action of the" spring causes the contents in the brake cyliiider' to serve as a solidhody. This tilting of the post;

to the right also causes the rack to' revolve its pinion and the valve 5 is immediately closed bythe rotation of itsvalve stem, the flanged .tube being a stationary or fixed point It is evident that with a change in the gate, as instanced, the speed of the prime motor will be accelerated and the balls now bel0w t-heir' normal'position will tend t'orise and resume their proper place. This act would again ro tate the valve rod and actuate the valve. Hence to keep said valve closed during the re turnof the balls; the post is retarded more or less asit returns to the vertical, since it is this latter act, which serves to prevent movement From the above description it will be under-' stood that the return of the tilting post. to the avertioal 'is intended to counteract the return of the weights to their proper position, the deviation of said weights from such position neccssitatin g a change in the main gate. Hence this movement of the post is intended to be slow, as the balls ordinarily are not suddenly influenced bythe main gate. it will he further understood that when theposts. is at either direction will open the secondary valve.

On the other hand the departure of the rocklug post from the verticalcaused by'the movement of the weights will serve to close the valve.

.What I claim is-- 1. The combination with a centrifugal regnlator,- a fluid-filled cylinder, and a pistontherein' which controls a main valve for some prime motor, of a regulator valve adapted to control the travel of the piston, mechanism operated by movementof the pistontoclose the valve, and means to counteract the'functious of theballs inv the act of resuming their normal position to prevent the valve being operated, substantially asspecificd.

2. The combination-with a centrifugal regulator, a main valve, a fluid-filled cylinder,

nlator valve for the piston, and mechanism interconnecting said regulator valve and piston and adapted to neutralize ahcertaiu times the functions of the regulator weights to move said valve, substantially as and for purposes explained. v

3.1:: combination with a centrifugal regulater, a fluiddilled cylinder,; and a piston therefor, a secondary valve to control circulation in said cylinder, and a rocking post.- operated by the piston to regulate the movements of the valve, substantially as set forth.

4. Acentrifugal regulator, a fluid-filled cylinder, its pietomscda valve operated by the regulator, combined with a rocking poet, mechanism from the post; to the valve, ZSlllU3 wise means toaotuate the posting travelof the-piston, substantially as stated. I 5. In-speed regulators having centrifugal weights, aliquid-t ight cylinder, a piston therein, a valve to regulate traveioi' the piston,

regulator to shift the val vein right line movethe verticaL'then movement of the halls in too and a pistonoperating the said valve, of a regcombined with mechanism operated by the.

the piston, a love rod united with said regulator for right line slitling travel, a rocking post, a, rack and pinion to rotate at times said valve rod to slide the valve, and mechanism to interconnect the, postwith the piston, substantially as set forth. 7. In regulators, a rotary sleeve, centrifugal weights thereupon, a flanged tube reclprocated by said weights, combined withe valve, a. valve rod longi! udinelly of the flanged tube, connections between the valve rod and tube to permit independent rotation of the rod means for producing rotation of said rod, ands, pision controlled within a cylinder by the movementsof the valve, substantially as described. 8. '-In combination with a, cylindenits piston, a valve to control the travel of said piston, a rocking post, and n hcnisin to operate the valve upon tiitin f the post, a bar nfiixed to tilt theorist, and broke mechanism toreguiste the return of the post to a normal, substsntinlly as specified. 9. The ooiniainntion with a fluid-filled eyl-- 3o incl a piston, its piston rod, on actuating be a hell lever operated by the her, of a room iost adopted to stand unright n raga later valve operated thereby, means to incline the post from the vertical, and brake mechanism to regulate the return of the post to an upright position, as stated.

10. The combination with n fiuid-fillod cylindex, its piston, a brake cylinder, and a regulator valve adapted to slide entlwise upon movement of the piston n tilting post, a rack and pinion united with said post to retote the regulator valve, and a, hell lever like wise connected with said post and actuated by the travel of the pistom-substantialriy as explained.

11. In regulators a. cylinder, its piston, a regulator valve, and a, reciprocating rod,et-

taehecl to said valve, combined with a. fixed.

standard, a tilting post adapted to stand upright thereupon, e bell-lever, and a her alfixed to the piston rod for actuating the said lover,

s pisron-equinped 4L pivotally secured to the post, a brake cylinder secured to the bell- .lever, and means to regulate the travel of the brake piston by which to controLt-he return 55 of the post to it normal, substeutinllyfor purnoses specified. I in testimony whereof I :alfix my signature in presence of two witnesses.

NATHANIEL LOMBARD.

' Withessesi H. E. honors FRANCIS =13. asuwoon.

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