US35584A - Jm provement w fx ed-r eg u lato r s fo r - Google Patents

Description

i To all wh n ztmay concern: "i i Be itknownthat LifGHARLns H. BROWN, of Fitchburg, jin `l i i ty of lVorcesterV and l Stateot-Massach i s, have `invented anew l and usefull Impro `ment in Feed- Regulators i for Steam-Boile dldohereby declare that thefollowing ull, clear, and exact deky `scription ofthe `etreference being had to "theaccompany drawing, forming" part of "this specificatio aid drawing t. representing acentral verticall section of afeed-'regulator 1 constructed` according to my invention. ,.r y `This inventionrelates to that -classsof boiler feed-regulators," hichieffect the movement `necessary tosctthe feedlpuinp in operation or` "produce thelsuspension of its operation by means ofltheexpansnand contraction of a. pipe whichis arranged atthe intended waterlevel of theboiler, and which receives fronithe boiler eithersteam or; water, according as the water thereinis aboveorlb'elow a certain level. `To enableothers skilled inthe art tomake f y and use myinventioml will proceed to describe Y its construction andoperation.' i J i f A is the expanding and contracting pipe ar-` ranged ina lfiorizontal position, connected at one end.ld.,iwith the "boiler atthe intended water-level,andfurnished at the other end with t `anyelbow,"C, whichy has a downward direction i for-the connection of a pipe, B, which is`-con nectedwith the waterlspace of the boiler some ldstance` below `where A is connected., The pipe B ismadeoi brass, or some other metal i which hasgreatcapability of expanding by heat.

. suitable fixedsupport and having arranged to work nponit a lever, E, of the first order, which has its shorterarmconnected by a pin, i b, with the elbowQpand its longer arm con- -nected by a pin, c, link G, and pin d, with a isa stationaryffulerumpin attached to any "secondlever, F,of the second order, the fuland the .opposite end, f, of which is connected with 'a belt-shipper forthrowing the feed-pump into and out of` gear wtha steam-engine, with a stop cock or `valve inthe suctionpipe of the pump, or with aistop-cookv in the steam-pipe of the pump,A in caselof a steampump being used for feeding the boiler.

always correspondsiwith that in the boiler.

cruni H of `which, is secured to the elbow C,

The level of the water in the pipes A B` "rt Bnown, on Frrtjnetune;MAssAcHusnrTs,

ENT il FEED-@REG ULAT R S FO ST E-AM BOI LERS.

` formingpart of Letters Patent No. 35,5841, datedJu'ne 1,7,

the top ofthe pipe A, thelevers E and F are in such positions that the leverv F keeps `the feed-pump out of gear or'closes the stop-cock onvalve, by which its operation is suspended;

ibut when the said level gets near or below the bottom of the said pipe the said pipe expands by thelheat imparted to it from the` 'steam and moves the pin band fulcrum `H in the directionj of the arrows l and 2,- (sliown near them `in the drawngs,)and bythis means theupper ien'd of the leverE and the link G are moved i in 'the direction of the arrowu'iand the upper end ofthe levv'erfF is moved in the direction ofthe arrow 4, and so caused to throw the *feedpump into gear or open the valve or cock by which the said pump is put in operation;

"but when the level of the water in the boiler againgets up `to or above the top of. the pipe A, the water in thesaid pipe, being out of ciri culation, cools, and the pipe getting cooler contracts and produces a movement of the levers precisely the reverse of that above described, and causes the lever F to throw the pump out of gear or close the stop-cock or valve, and thereby stop itsoperation.

The abovedescribed movement of the upper end of the lever F is produced in part by the action of the pipe A at b upon the lever E, which action is transmitted by the link Gto the lever F, and in part bythe action of the said pipe at I-I upon the lever F, and hence a Avery much greater movement ot' the upper part of the latter lever is produced than could the single lever of the same length.

ment the fulcrum D of the short lever E is exactly on a line with the center of the expanding-pipe, and the short arm ot` the short lever .is connected with the pipe on one side, and the short arm of the long lever is connected with the pipe on its opposite side and at equal distances. from the center, ot' the pipe. This combination not only increases the motion of the long lever just one-third, but equalizes the strain, bringing it into the center of the pipe,

the same purpose. In shifting a belt from a it is requisite in ordinary cases to get a motion of from threeto four inches, and to obtain this motion from an expanding pipe by a combina- When the level in the boiler is up to or above tion of levers it is lnecessary to have all the be produced by the action of the pipe upon It will be observed that with my arrange insteadof on Oneside, as in other devices for tight and loose pulley to stop and start a pump side, the resistance is generally so great that the pipe and other parts are apt to spring to such a degree as to cause the long lever to fail to operate. This objeeton'is entirely obviated in my improvement.

The contrivance for producing the copious How of Water into the pipe A to cool it and produce its contraction as the level of the Water :in the boiler rises consists of a large chamber p or reservoir, I, in the pipe B. This chamber contains a considerable quantity of water.

. When the circulation of the water in the said pipe ceases, owing to the filling up of the pipe A with water, the temperature of the Water in the chamber l, as well as that in the pipe B, is soon reduced by the exposure of the said chamber and pipe to the atmosphere. Villen the level in the boiler rises, the water Hows therefrom into B, and through it toward the outer end of the pipe A; but the water which has been retained in the pipe B and reservoir I is forced upward therefrom into the pipe A before any of the hotter Water from the boiler itself can ent-er the latter pipe, and hence by having retained a larger quantity of Water between the lower part of the boiler and the outer end of the pipe A than could have been retained in the pipe I Without the reservoir a larger quantity of cool Water is supplied to the pipe A, and it is cooled more quickly and caused more quickly to effect the stoppage of the aetion of the feed-pump.

The pipe B should be flexible enough to yield to the expansion and contraction of the pipe A, or be provided with a slip-joint which will accommodate itself to such expansion and contraction.

What I claim as my invention, and desire to secure by Letters Patent, is

1. Having both of the levers E F jointed separatel y to the expanding pipe A, said joints being arranged upon opposite sides of said pipe, in combination with the fulcru n1 D and the link G, as and for the purpose herein shown and described.

2. The employment of the cold-Water reservoir I, in combination with the expanding pipe A and lever F, substantially as and for the purpose-herein shown and described.

CHARLES H. BROWN.

Wi tn asses:

C. H. B. SNOW, CHAs. J oHNsoN.

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