US984276A - Carbureter. - Google Patents

Description

J. B. KELLY.

CARBURETER.

APPLICATION FILED 111111.21, 1910.'

Patented Feb. 14,1911.

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CARBUIRETEB. j

-u "L ai:y Specification ot Letteretemente` i N gina n i Application led March 21, 1910. lSerial Ho. 550,737. Y

B e itltnown that I, JOHN B. Knlafr, a

citizen of theUnited States, residing at improved `means ,for controlling the admissionof air, for mixture with the fuel-oil,

into. the mixing chamber, whereby the proper;` amount of air may be supplied regardless of the speed at which the engine Isupplied therefrom operates. .15, t

, view in sectional elevation a carbureter con-y structed v1nacco-rdance'w1th my invention.

gThe accompanying drawing shows by a The mixing chamber of the carbureter is -illustrated at 7 and is formed with an outlet `8 controlled by a throttle-valve 8, and com- -municates with an air-conducting passage 9 below it. The passage 9 contains an upwardly opening nozzle 10 which communicates through the passage 11 with the usual valve-equipped gasolene supply chamber (not shown).

Screwed into an opening 29 in the wall of the chamber 7 directly above the passage 9 is a plug 30 containing an opening 31 with tlie wall of which a needle-Valve 32 has 'screw-threaded connection for the purpose of permitting the valve to be adjusted up and down. The lower end of this valve which is of inverted conical form, as represented at 33, is arrangedconcentric with relation to the outlet 34 ofthe nozzle 10, the wall of which is of inverted truste-conical shape as representedcat 35.

The passage 9 opens into a combined priming cup and air-inlet device 3G which,

.. in its preferred embodiment, is formed of a cup-shaped member 37 containing a plurality screwed into the circular wall 38 forming the passage 9 and i I of radially-disposed openings 39"rea`ching short of the bottom of the cup.

Screwed into one end of the wall 40 forming the mixing chamber 7 is a plug 4l formed with a 'relatively large circular opening 42 having its inner edge beveled as indicated at 43. The outer end of this plug is of spiderframe construction as represented at 44, the central hub-portion 45 of which contains an opening 46 of angleshape in cross-section in having a beveled edge-portion 49 at 'which 1t 1s adapted to seat against the beveled portion 43 of the plug 41. The opposite end and is threaded externally as represented at 50, issurrounded by an internally-screw threaded sleeve 51 screwed upon the threads 50 and adjustable thereon for a ,purpose stem 47 carrying a nut 52 adapted to hold the sleeve 51 on the stem 47 invv adjusted position. The sleeve "51 is also externally threaded as representedJ and screwing upon these threads is a nut 53 of preferably hex` agonal form, this nut having one face recessed as represented at' 54 for receiving' one end of a coiled spring 55, this spring'being confiired between the nut 53 and a dust-cap the plug 41. A nut-lock 58 secured to'the stem 47 between thesleeve 51 and the nut 52, coperates at its free flexible end-portion 59 with the nut 53 for holding the latterin adjusted position on the sleeve 51.

In the opgigition of the engine equipped with the carbureter, the oil is drawn, by the engine suction, from the supply thereof through the nozzle 10 into the mixing-chamthrough the openings in the priming cup, it being understood that the latter is adjusted in the wall 38 to cause it to permit the requisite amount of air to enter the passage 9 for operating the engine at low speed. The valve 48 is an auxiliary 'air-valve for supplying air, under the suction action of the engine, to the mixing-chamber 7, in addition to that supplied through the cup, or main air-inlet 36, when the engine is operating at intermediate and high speeds. It is preferred that the valve 48 be first adjusted to regulate the air supplied through it for run- I ning the engine at high speed, this being done by screwing the sleeve 51 on the stem 47 to a position in which the inner end of this sleeve is spaced from thehub 57 a distance equal to the displacement of the disk from the seat 49 necessary for admitting to the chamberl 7 the proper Volume of for running the engine at high speed. After this adjustment has been made, the nut' 53 should be adjusted on the sleeve 51, while the engine is running at intermediate speed,

which a valve-stem 47 is" Yr ciprocably supported. The inner end of"` tto so tension the spring as to cause the rroper amount of air to enter thechamber of the stem 47 which is reduced in diameterhereinafter explained, the outer end of the 5G surrounding a shouldered portion 57 of the stem 47 carries a. 'circular valve-disk 48 I ber 7 where it is mixed with the air supplied for running the engine at speeds intermediate high and low speeds.

By forming the auxiliary air-inlet valve as described, it is rendered, by reason of the spring feature, sufficiently sensitive to cause. it to operate When the engine is running at sp'e'eds intermediate the 10W and high speeds, to supply to the earbureter the requisite amount of air, and' operates automatically, Without interfering with or aiiecting its sensitiveness for operation at intermediate speeds, to limit the opening of the valve for controlling. the air admitted to the carbureter for operating the engine at high speed.

What I claim as new, and desire to secure by Letters Patent, yis i l, In a carburetor, the combination with a mixing chamber, and means for supplying oil to said chamber, of `means for supplying air to said chamber comprising a valve, a stop-device adjustable on the stern of said valve operating to limit the opening of the latter, a spring surrounding the valve-stem for yieldingly holding Vthe Valve to its. seat, and means for adjusting the tension of the springiffor the purpose set forth.

2. Ina carbureter, the combination with a mixing-chamber,- and means for supplying oil to said chamber, of means for supplying air vtheretg comprising a valve, a sleeve threaded on the stem of said Valve operating to limit the opening of the valve, a nut screwing upon the sleeve, and a coiled spring surrounding. the valve-stem and coperating with said nut for yieldingly holding the valve to its seat. Y

3. ln a carburetor, the combination with a.

air to the chamber comprising a stationary member formed With a valve-seat through which said chamber communicates 'with the atmosphere, a reciprocable stem carrying a member adapted to bear against said seat to close the Valve, a stop-device adjustable on said stem and operating in conjunction with said stationary member to limit the movement of said stem, a spring operating to yieldingly hold the Valve closed, and means for adjusting the tension of said spring independently of said stop-device, for the pur-v pose set forth. l

4. In a carbureten the combination .with a mixing-chamber, and means for supplying.

oil to said chamber', ofmeans for supplying air to said chamber' comprising a valve, an

With said valve for holding it yieldingly against its seat, and adjustable independently 'of said stop-device, and Without varying the adjustment of the latter, for the lpurpose set forth.

lR. SCHAEFER,

JOHN WILSON.

` adjustable stop-'device for limiting the opening of said valve, and a spring cooperating

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