US1312814A - Potted si - Google Patents

Description

UIL FEED APPLICATION Paented Aug. 12, 1919.

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j@ filillll .CHARLES nnwnnnoe sToKE-s, or' nnrinerre, We. Yonne, New senses: wenns,

. .eusitnein Specification ci! et'ters Patent.

l @riginal application filed August 5,1915, Serial No. 43,7631. Bivre and application llet Elan 23, 1316. Serial. lilo. simi?.

To all whom t 'may eoncern:

Be it known that CHARLES LAWRENCE Sienne, citizen of the United States of America, residing at M illong, via Young,

New South Wales, Australia, has invented certain new and useful Improvements 'in Oil-Feed Controls Vfor Carbureters, which are divided out from his prior application, Serial No. 43,761, dated' August 5, 1915, and of which the following is a specification.

The invention relates to valved oil feed controls and has for one of its olijeets a means whereby suction et an engine er the like yserves to control or regulate a valvetl liow et fuel of a Carloni-eter. y The invention comprises a piston or the like which on beine sub'ected to suction a y a l controls or regulates by its movement a fuel valve leading to the earbnreter. Such fuel valve control engine suction need not neesarily open the fuel port to its fullest extent, but the spring pressure or the like against which the suction operates inlay regulate the fuel iow in proportion to the engine suction'. This type of regulation will depend merely on the stiffness of the spring ortlie like'provifled.

In carrying out a further object of the invention I provide avjt'uel valve control which. although. below the normal leve'i or the source enables me to dispense with al' kinds of paelings er glands which would necessarily interfere With the responsiveness with which tne fuel control er regulator' would be susceptible to the engine suotion.

Moreover, l cimtenxplate regulating the responsiveness er tlie suction 'fuel vulve by varying the play of the spring controlling' the lvalve piston.

In the aeeompanymg drawing which illustrates a carburetor in Vertical seetion with 'Elie inlet connection fuel oil, 9 fuel oil feed pipe through which oil is supplied under an approximately constant heed of pressure, l() connection from valve chamber ll et end of pipe 9 to feed connection 8 of the earlou` roter, l2 pipe Connection from upper part of carbureter te cylinder 13.

The piston let is a free sliding lit in the cylinder V13. A. helical spring incompression is fitted above said piston 14 and acts to press same downward. i6 is a valve stem attached to the piston 14 and passing freely tlirougili a tube l?, the lower enti` of which is screwetl inte the top of the valve case ll.. 0n the lower end of the stem i6 is a valve i8; said stem may also have a re.

verse valve if'ace 19 formed upon it. The valve lis adapted to eo-aet with a seating 20, and the valve fece l) is adapted to eoaetwitli a seating at tile foot of the pipe l?. The pipe il' is of sufficient height to extend above the level to which the oil would rise in said pipe under the head or pressure applied te it; thus astullingr box is rendered unnecessary and sticking of the valve stein is avoided, the valve stem llening easily mevable antler 'tire action (yf the suction or of tlie spring. The weight et' the valve and its stein and pistou may be counterlmlanced in any convenient way, as by the means iliagrannna-tioalljy indicated in tlie drawing, such means consisting; of: a lever 22 with connterweiglxt 23 fulernmerl t 2% on a bracket 25 and pivotally connected at 2G to- -said stem l, suoli co1mlerbalaneing facilitilting the movement of tlie valve 'by the eli-- gine suction. The air shutters 3 and 4: are llap valves closing against apertures 2l'. and 2S on either side oi an angularly disposed Cirami/er 29 terminer nait of the mixingr chamber These air salvos arc liingrerl ou one pintle 30 wlxioli is mount al in tile part 29'. l is a 'liunm wlieel having two srie's :al spindles l and 33 i oitlmr sillo of tlireaileal rin-lit and t hand respcwti\'clj/ These worl-r through nuts '-l :unl Ili lie-:eil en e enfle el' leaf springs ill; ami. il?,

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the other ends of said springs being attached to the valves 3 and 4 at 38 and 39 respectively. The weight of' the thumb wheel 31 with its spindles counterbalances the Weight or' the valves 3 and 4, said' thumb Wheel and saidivalves being respectively on either side of the pivotal center 30, so that if the said valves wereV not in contact with their scatings the weight of said thumb wheel and its spindles overhanging the center 30 would prevent them falling by gravity around the pintle 30. The tension on the springs 3G and 37 which is varied by turningir the thumb Wheel 31 operates to holdtlie valves 3 and l more or less tightly against their seatings, so that their sensitiveness is thus readily, adjusted. Said valves are opened automati cally by the external pressure ot' air on them when the throttle 5 is opened so as to bring the atmosphere in the mixing chamber 2 below atmospheric pressure. As `the valves open they move toward each other and they tend to move the outer ends of the springs apart. As this is prevented by nuts 34,35, the springs are tensioned and tend to return the valves to closed positions when the pressure in the mixingchamber rises.

For the valves 3 and lany otlier known. form et spring loaded automatic air valve may be substituted. The manual additional air valve Z is a cap the spindle A'l0 of which 'is fitted with a closing; spring 4-1which holds the valve tace down on the seat 42. 43 are air ports. ll a flexible wire or other mcchanical connection to a hand lever, said hand lever being' placed within easy reach of the driver.

ln operation, oil is supplied through the pipe 5l under an approximately constant head. Flow of same to the carburetor is checked by the valve 1S until the engine is started up, producing n suction in the upper part ot' the carburetor. also in the upper part ot' the cylinder 13 through its pipe connection l2 to the carburetor, and relieving;` more or less the atmospheric pressure abovethe piston 14, permits atmospheric pressure below it to force it upward, thereby bringing up the stem 1G and lifting the valve 18 oil' its seat, and imn mediately thereafter closing the valve 19 on its seat 21 whenever a full lift of the valve occurs. Oil may now flow through the pipe 9 the valve case 1l and pipe 10 to the carbnretcr inlet connection 8,i the extent of opening oi' the valve 1H boing determined by the degree ot engine rsuction and the stiliness of the spring l5. The counterbalancc acting through the lever supports the static weight ot'ithe piston, its stem, and the vulve and so the valve is controlled only by the action of the spring lli on the one hand and the degree oit vacuum duc to engine suction on the other hand.

The construction of the mixing chamber This suction exists' vantage to use a valve shut olf which is -t'o A be opened by an initial suction of a suction producing device', the above described valve control can -be installed. l

De ending on the size and outlets of the chain Jer 13, the outlet branch 12 'and the strength of the spring 15 in certain adjustments, it is clear that during normaloperaf tion of the engine the valve 18 vvillv be tained in full open position.

' As the function of the piston 14 is to move in response to variations in the degree'of vacuum in the induction of the engine. its particular form is immaterial, and it :may be substituted by any equivalent device.

What I claim as my invention and desire to secure by Letters Patent is l. Mechanism forcontrollingthe fuel supply of carburetingmeans for internal combustion engines, comprising incombination a chamber separate from and independent oli said carbureting means and adaptedto be connected to the inlet pipe of an engine, means Within said .chamber'movable in one. direction under engineI suction, a valve chamber having an inlet adapted to be'connected to a tuel supply and an outlet adapted to be connected to said carburetin'g means, a. valve in said valve chamber controlling the passage of fuel from the inlet to the outlet, said valve'having a valve stem 'connected to and operable by said movable means, and a stein and having` its upper end` above the highest level to'which the fuel can rise therein under its head pressure.l

2. Mechanism foif controlling the fuel supply of carbureting means tor internal; combustion engines, comprising in 'combinae tion, a chamber separate from and independent of said onrbnretingmeans and adapted to be connected tp the inlet pipe of an enmain.v

Otubular n'iember loosely surrounding said gine, means with'in said chamber movable in one direction under engine suction, a. valve chamber having 'an inlet adapted to be connected to a fuel .supply and van outlet adapted to be connected to said carbureting means, a valve in said valve chamber controlling; the passage of ,fuel from the inlet to the outlet, said valve having a valve stem connected to and operable by said movable means, and counter-balancing means con: ncctcd to said valve stein.

3. The combination with the inlet of an internal combustion engine and carlnuetu ing means connected to said pipe. et e valve chamber having a fuel' inlet, a fuel conduit upper Wall of the valve chamber and loosely l extending from said chamber t0 said means, surrounding said valve stem, said member a valve within said chamber controlling `the extending upwardly above the highest level passage of liquid fuel from said inlet'to said to which the liquid can rise therein under its 1.5 5 conduit, a chamber independent of said carhead pressure.

vbureting means, alconduit connecting said In testimony whereof I have aiixed my chamber to said inlet pipe, means Within signature' in presence of two witnesses.

fsaid chamber operable by-engine suction, CHARLES LAWRENCE S'lOKES.

va valve stem between the last mentioned Witnesses: y 10 means and'said' valve for operating the lat- H. C. CAMPBELL,

ter, `and a tubular member carried` by the W. I. DAVIS.

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