US48652A - Improvement in governor-valves - Google Patents

Description

'UNITED STATES j PATENT nalen.

"oLIvnn i.. BROWN, or MANITOWOG, vvIsrmN-sriv.l

11M PRovEiwi-:NT uv sovranaoR-vit|...v esf.vv

Specification forming part of Letters latent No. 8,65% dated July 171, 1865.

Stateof Wisconsin, have invented anew and Improved Governor-Valve; .and ll do hereb5r declare that the following isa full, clear, and

l/exact description thereof, which'will enable those skilled in the art to make and ,use the same, reference being had'te the accompanyin gcanlbe firmly secured in the sides of the chamberyand it is fastened in its socket'by suitable screws or keys,`c. l

The valve D is slight] y tapering', and i "t-tedinto the seat C, as clearly shown i1 iig.

2 of thev drawings, and it is' provided with two v stems, et d', extending. in opposite directions through suitable stuffing-boxes in' th/heads -E E( of the case A. Theouter end. of these drawings, forming part of this specification, in

which\ Y Figure 1 represents a vertial section of vthis invention, taken in the plane indicated bythe line mja', Fig. 2,. Fig. 2is-a similar section, the line y y, Fig. 1f, indicating the plane of section. Fig. 3 is a partial plan ofthe valve and valveseat detached. Y

Similar-'letters of yreference indicate correspending parts.'

fe-This invention relates to avalve which-.is lprovided with a series of cavities and works stems arerfurnished with steel caps to receive the points of the screws e e', which-screw intoe the ends of arms F .screwedto the case A. .means of these screws the valve can be adjust ed in itsseat so that it works with the, least possible friction, and said screws are prevent. ed shifting their. position spontaneously by` jamhuts ff. One of the stems bears the le- Yver g, which connects by a suitable rod with the governor, and the other stem isperi'orated to receive the index, which moves over a scale marked on the outside of the head B, and cal,

. a sudden stoppage is prevented. Y ofthe valve in its seat is lregulatejl by set- `screwsacting on the ends of 'the valve-stem,

in an annular seat which is `surrounded by'a steam-chamber and perforated with a series of fapertures or `slots corresponding-iu number ,and position tothe cavities in the valve .in such a manner that byturning thevalve in its seat said cavities can be made to registerpartially or wholly with the apertures in the seat and more or less steam passes through the valve.; The cavities in the valve are tapering `'on-top, so that their edges ,out off the steam gradually, and injury to theworlriug parts by 'ihe position so that it works with the least possible amount oi' frictiomand the steam acts on it with equal pressure all round, so that it works equally well under pressure as it does in the open utmosphere.

My valve is composed of a shell, A, ot'cast iron or any other suitable material, to which steam is admitted' through a channel, a, and

from which the steam discharges-through a' channel, b.. The supply-chan'nela leads to a steam-chamber, B, which forms a separate part of 'the casera, and the sides of this chamber are bored out to receive the seat G of'the valve D.- Said seat is slightly tapering, so that it' culated to show the amont of motion given to the valve.

The valve-seat C is perforated with a series of apertures, h, at suitable distances apart, and arranged so that the valve is exposed to a uniform pressure all round, and that it will oper-v ate justas easy `when exposed to a high press uro of steam as it will whenexposed to the ordinary pressure oi' the atmosphere.

`The valve 'D lis' provided with a series of cavities, i, corresponding in number and posi-4.

tion to the apertures hin'theseat.. These cavities extend through 4the entire length. of the valve', and if they are brought to register whol# -ly or partially with the aperturesh the 'steam` from the chamber B passes through them into the space between the partition-walls of said chamber and the shell A, and thence through the discharge-channel l) tothe steam-cylinder or other place where it may be required. The apertures h in the vaivelseat are rectangular, but the openingsor outcredges of the cavities i'. form trapezoids, the short sides ot which are parallel, asv clearlyY shown in Fig.. 3. It' the valve is turned, it cuts ctt' the steam gradually andinjury from a sudden stoppage'isavoided. The cavities increase toward the center for thc purpose o? giving free egress tothe steam.

' of-the valve is avoide 'and the steam has free to operate as specified.-

This valve wQrls very easy under high or stems d d', arms F, screws e e','conica1 valve loixr pressure. It can be readily adjusted sim- D, formed with trapezodal openings i', annuply by turning the screws e e'. By'eombiniug lar seat E, with rectangular openings h, steamtlie cham/ber B with the shellAallend friction chamber B, inlets a, and outlet b, all arranged passage at boih ends, so as v0 equalize the re- LVER L BROWN" ,I claim as new md desire to secure by Let- Witnesses:v v ters Patent- RUFUS l. FULTQN,

The combination of the projeoing valve- D. L. WHITNEY.

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