US1794791A - Blower valve - Google Patents

Description

March 3z 1931 Filed Nov. 26, 1929.

B. J. MORRISON l BLOWER VALVE 2 Sheets-Sheet l March 3, 1931. B. J. MORRISON BLOWER VALVE Filed Nov. 26, 1929 2 Sheets-Sheet 2 Urfa MUFFLER & SAFETY COMPANY, OF BALTIMORE, MARYLAND, lA'y CORPORATION OF MARYLAND BLOWER VALVE The blower valve, which is the subject of the invention, is variously applied, being used in locomotives for discharging steam into the stack to create a forced draft wherever forced draft is required, shutting offfthe flow of steam when, for any reason, thenatural draft is suflicient. rlhese valves are also used to control the steam supply in blowing out boiler tubes and under various circ,uinstances'where immediate control of a supply of steam which can be instantaneously released to flow at high speed, is desired. vl/Vith. the blowerr valves formerly 'in use, ay considerable amount of difficulty has been encountered dueto the tendency to-lose the balances or upper and lower valve seats.

This difiiculty incident to the loss ofy such valve parts, occurs mainly when the pipe connections are removed for any reason as when locomotives 'are dismantled forrepairs, the

different parts being removed by differentV gangs of steamiitters, boiler workers,va'lve men' and the like. When the blower valves as vformerly constructed are thus removed, there is nothing to hold the valve discs, otherwise known as the valve seats, in position, so that both discs or seats .dropout and are lost. When it becomes necessary to reassem-V ble the locomotive or other installation containing such valves, these parts are missing Vand'arereplaced in various ways, either by obtaining'new ones from'the valvemanufaeturer, or, on account of the tendency ofrail-w way shops to make whatever 1s required in.`

the way of repairs, they arereplaced by discs or seats made in the shop. Such replacements cause great difliculty, delay and expense.y To

overcomethis diflicultyis the object of the invention.

- With the foregoing facts in view, the present invention provides a blow off valve provided with'means for securing the lower seat or disc, as it may be termed, in position, so that neither` seat vor the disc can befac-cidentally released. litV will be understood in ythis connection that the upper valve disc or seat rests on the lowerone andis removably connected to the valve stem to be rotated thereby. The lower seat holds the upper one in operative position. vThe securing means which is the subject ofthe invention permits free play'of the lower disc relatively tothe casing so that thelower disc maybe positioned by suitably formed surfaces provided forthis purpose on the valve casing and the adj acent coupling.

ln the accompanying drawings l haveillust-rated a blower valve for the variousV uses described embodying the features of' Iny'in-V f kvention in the preferred form.

inthe drawings: s

- Figure l is a section inr a plane including the axis of the 'valve stemor spindle.

*Figure Qis a section in a plane at right angles to the, planeof Figure land incl-udn ing the line 2 2 of Figure l, looking` down'- wardly. f

@FICE BAnrnoLoivI-nw J. ivronnrson, or BAnr'rIvronn, MARYLAND, Ass'renon 'ro rim ooALE y Figure 3 1s a section on the line 3-3 lookv ing upwardly.k y y i .Figure 4 is an elevation-of the upper valve disc, also referred toas the upper valve seat;

a portion-to be broken away to show the internal formation of the disc in section.

Figure 5 is acorresponding view of the lower valve seat or disc.

Figure V6 is a side elevation of the valve casing, the lower portion being broken away,

eXposingthe valve disc and seat. This'view valso shows the valve coupling member in a position'y slightly removed in the direction of the axis from its operative position in connection with the valve.

Figure 7 isa planview taken from a position indicated by line `Zi-7, looking upwardlyrat the valve casing and seats with the coupling memberremoved.

Referring to the drawings by numerals,`

eachof whichis used to indicatethe same or similar parts in the dierent'views, the construction shown comprises a valve casing l, containing upper valve disc or seat 2 and lower valve disc or seat 3. The lower valve seat 3 is shown as having a peripheral flange d projecting outwardly from its lower edge. This flange projects beneath the bottom edge 5 offthe valve casing' and in the assembled relation of the valve parts it is held between I they bottom edge of the valve casing vand the inner horizontal surface 6 of the couf pling member 7, being suitablypacked at 6.

separate from the discs and having means for engaging the upper disc to rotate it,a.coupling member having athreaded engagement with v the bottom of ther casing, said lower dise being adapted to be securedbetween said oasing'and said coupling member, and a bayonet slot connection for securing said bottom disc 1n said casingto prevent the loss of the discs when thecoupling isy removed from the valve casing. ,y

3. The combination 1n ya blower valve substantially as described of a valve Casing, of a gagement with the bottom of the casing,y the f lower seat having means for holding the same in position, said means being adapted to be secured between said casing and said cou- Y,

pling member and meansfor securing said bottom disc. in said easing,said securing means permitting free play of the'disc. relative to the casing so that it may be positioned between the casing and the coupling member f and serving to prevent the loss of thediscs when the coupling is removed from the valve casing.

Signed 23rd day of November, '1929.

BARTHoLoMEw J.A MORRISON.

by me at Baltimore, Maryland, this. Y

CERTIFICATE 0F coRaEcTioN.

Patent No. 1,794,791. Granted Marcil 3, 1931, to

BARTHOLOMEW J. MORRISON.

It is hereby certified that the assignee in the above numbered patent was erroneously described and specified as "The Coale Muffler 81 Safety Company, of Ealtimore, Maryland, a corporation of Maryland", whereas said assignee should have been described and specified as The Coale Muffler & Safety Valve Company, of Baltimore, Maryland, a corporation of Maryland, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 14th day of April, A. D. 1931.

M. J. Moore, (Seal) Acting Commissioner of Patents.

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