US787494A - Valve mechanism for fluid-fuel burners. - Google Patents

Description

l l PATENTED APR, 18, 1905n H. M. BURNELL n M. E.' MOGG. I' VVALVL MEGEANISM FOR FLUID FUEL BURIMRS;`

APPLIGATIGN ILED (10T, 10,1904.

.u u. 4 u'r five.

UNITED. STATES Patenten April 18, 1905.

PATENT Orricn.vm.

n, BURNELLAND MILLARD E, Mose, oF cineasta;Ii".L'niois.g

VALVE MECHANISM Fon FLUID-FUEL BURNE'R-SY vsencri-Ica:cron forming part of Letters Patent no. 787,494, dateajfiprn'isfieog, 'ff

Application ned ontario, 1904. semi No. 227,913. y l

f do declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art.to which it appertains to make and use the same.

This invention relates to improvementsin automatic supply mechanisms forvtluidrfuel burners, and more particularly to a thermostatically-controlled valve for' regulating the A supply of liquid or gaseous fuel to the burne of a steam-boiler or* the like.

One object of the invention is to provide a simple and highly-efficient mechanism of this characterwhich is especially' adapted for use on steam-propelled motor-vehicles.

Another object of the invention is to pro' vide avalve mechanism of this character which may be quickly and easily adjusted' by hand to control the supply of fuel to the burner.

. A further object of the invent-ion is to im- `prove and simplify the construction and operation of mechanisms of this character, and thereby render them more efiicient and durable in use and lessnexpensive to manufacture.

With the above and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be more fully described,

and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a perspective view of'a valve mechanism constructed in accordance with this invention.

`Fig. 2 is a vertical sectional view through the a detail perspective view of the valve, and

Fig; 6 is a detail perspective view of the adf .justable Avalve-Seat.l

Referring now more particularly to the ment of the invention,.thenumeral denotes a casing or housing, preferably inf the 'form'of p l a casting, which comprises ahollow-orftubular body 2, having adjacent to. its: upper end a laterally-projecting extension 3,lv which .has

l its outer end anged to provide a-.circularhead v 4;. Said extension or projection rhasanjopen-`1 ing 5 extending thereth rough and communicating with the bore 6 of the tubularifbody 2. In the bore 6 is formed an integral guide 7 in which a valve 8 is slidably mounted and concentrically disposed with respect to said bore.' Said valve 8, asv clearly shown in Fig.

5 of the drawings,consists ofla cylindrical body portion 9, formed witlra tapered' or pointed lower end' 10 and a'cylindrical enlargement 11 at its upper end, which enlargement A i terminates in a reduced portionor valve-stem 12. This stern slides in an opening 13, formed in the lower e'nd of a screw-plug 14, which closes the upper end of the tubular body portion 2 of the casing, provides a guide `for the .f-

upper end of the valve, andserves'as a stop to limit the opening or upward movement ofthe latter. In order to facilitate the feed of Huid fuel around the valve, the body portion-:9. of

the latter is formed withra series of longitudi- -f nally-disposed grooves or channels 15. The valve 8 coacts withian adjustablevalveseat 16, formed in the upper end of a movable element 17, which closes the lower end of the tubular-body portion 2, of the casing. .The

`said element 17, as clearly-shown in Fig.6 of

the drawings, is in the' form of lascrew-.plug having its lower portion'sol'id and cylindrical, as at 18, and its upper portionghollow 'Ortubular, as at 19. The extreme'fupper end of the tubular portion 19.1is.v .externally vscrewthreade'd, as at 20, with thread-s of a low pitch,

which engage similar s'crew-tli reads 2-1, formed' in a reduced portion '22: @of the b'ore 6i of the tubular body 2 at a point belowstliefopening 5 in theextension or housing gIheextreme lower and outer endo'f :the-,lelenientl "is formed with a polygonalb head by means of which the latter may zbe` tuinedfi'nthe screw-threads 21 in ordertoladjustthe valveseat 16 toward-orfromthe taperedlo-wered end 10 of` the valve, which endp'roje'cts'finto the bore orfopening in-"thetubularportion lof the said element, as shown. That part of the tubular portion 1-9 of the element 17 imme` diately below the screw-threads 2O is of a reduced diameter, as shown at24, so as to leave a Space between it and the adjacent portion of the bore 6. The said portion 24 is formed with a series of radial openings or apertures 26, which permit-the Huid passing below the Valve toentei said space or cl1ambe1'25, as presently explained.

In ordertoprovide a fluid-tight connection -o'r closure for the lower end of the bore 6, the

latter is formed with'an annular shoulder 27..

Rings of suitable .packing'-material 28 are placed upon the portion 18 of said element 17 and confined between said shoulder and the Iinner end of a screw nut or plug 29,;through which said portion 1 8 projects.- By screwing said nutinto the internally-screw-threaded 20 lower end of the'tubular body 2 the packing 2 8 maybe .jammed tightly around the element 17,110 prevent the escape of oil or gas.

Theoil,v gas, or fiuid fuel is admitted into vthe casing through aconnection in theform of an externally-screw-threaded nipple, which yprojects l lterally from one side of the casing and' open into' the'bore @above the valve. After passing through said valve the oil or gas passes into the space or chamber 25,' as

previously stated, and then passes out of a' The valve is automatically controlled byA means of a thermostat, as. illustrated in Fig.-

2 of the drawings. Any form of thermostat may beused; but, as shown, it comprises a tube 34, of copper o r other suitable material, inclosed in a tubular casing 35, having suit,- able steam connections 36 with asteam-boiler and screwed upon the outer end of a nipple or boss 37, in which the tube 34 is secured. Said nipple 37 is .formed upon a circular disk or coverplate,'which is bolted, as shown at 38, upon the head or iange 4 oi the casing in order to close the outer, end of the opening 5 inthe latter, a washer or packing-ring 39 being interposed between said plate and head to effect a fluid-tight connection.

Mounted in the tube 34 is a rod 40, of steel. or other metal, which has its inner end projeeting through an opening formed in said cover-plate. Said inner end of the rod 40 eo acts with the short arm 41 of a bell-crank lever 42, which is fulcrumed at 43 between two arms of a bracket 44, secured by screws 45 upon the inner face of said cover-plate. '.lhe

long arm 46 of said bcllecrauli is forked or bifurcated, asat 47, to engage the enlarged portion 11 of the valve. The parts will be so proportioned and adjusted that when the boiler temperature exceeds the required degree the excessive heat will cause the tube 34 to ex- A tent and nieves the rod 40 in the required directlon to open the valve 8 from its scat, so

as to cause an increased Vquantity of fuel to be supplied to the main burner. Hence the supply of fue] to the main burner is automatically controlled, with'the result that the pressure of the steam is prevented from varying excepting to a very slight extent.

The valve preferably closes by gravity, as shown, andits opening may be readily regulated by adjusting the valve-seat 16, as previously stated.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invern tion will be readily understood without re quiring a more extended explanation.

While the preferred embodiment of the invention is here shown and described, it will be understood that we do not wish to be link ited to the precise construction herein set forth, since various changes in the shape, proportions, land minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages o our invention.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. A mechanism of the class described, comprising a easing having inlet and outlet openings, a valve-seat opening between the inlet and outlet openings, an adjustable \falvescat in said valve-seatopening, an opening opposite said valve-seat opening and a guide device between the valve-seat opening and the opening which is opposite the sanne, a longitudinallymovable valve in said casing, guided in said guide device and extending into said vaisev seat opening, an adjustable valve-seat for said valve in said valve-seat opening and having a "stem projecting out of said casing and sorvving asa means whereby said valve-scat may be adjusted, an adjustablestop device for the valve in the opening which is opposite the valve-seat opening, a bell-crank in said casing connected to said valve, and a thermostat to control said bell-crank and operate said valve.

r2. A mechanism of the character described comprising a casing having inlet and outlet openings, internal screw-threads intermediate said openings, an integral guide above -said screw-threads and an internal shoulder below the latter, a tubular element adjustably engaged with said screwfthreads and formed with a valve-seat at its inner end and a series of apertures below said seat to afford communication between said tubular element and the 1nterlor of said casing below said screw-threads,

a packing for the outer end oi said elementl ing intermediate said connections, an integral apertured guide in said casing above said screw-threads, an annular shoulder in said "casing below said screw-threads, a tubular eie- `said seat to afford communication between said tubular element and the interior of said casv y ing below said screw-threads, a packing surrounding said elementand engaged with said annular shoulder in said casing, a packing-nut for said packing, a valve slidably mounted in said guide and coacting with said valve-seat, a cover-plate upon the outer end of said extension or housing, a bracket secured; upon said cover-plate, a bell-crank pivotally mounted in said bracket and engaging's'aid valve, anda rod for operating said bell-crank, substantially as described.

In testimony whereof We have hereunto set our hands in presence of two subscribing witnesses.

HARRY, M. BURNELL. MILLARD E. MOGG. Witnesses: y

WM. A. THIRLWALL, A. J. HALLE.

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