US871730A - Carbureter. - Google Patents

Description

y MTA/5555s.

No. 871,730; PATENTBD Nov. 1'9, 1907.

J. A. MUHARDY.

CARB'1111712121511.l

APPLICATION FILED JULY 24. 1906.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT oEEioE.

JAMES A. MCHARDY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO STANDARD CARBURETER COMPANY, OF RHODE ISLAND.

OF PROVIDENCE, RHODE ISLAND, A CORPORATION CARBURETER.

Specification of Letters Patent.

Patented Nov. 19, 1907.

lppiicaeon met July 24.1906. serai No. 327.541.

`State of Rhode Island, have invented certain new and useful Improvements in Carbureters,

reference being had therein to the accompanying drawings.

Like reference numerals indicate like parts. Figure 1 is an elevation of my improved carbureter.l Fig. 2 is a central vertical section of the same. g Fig. 3 is a cross-sectional view on linefmoi Fig. 2. Fig. 4 is a crosssectional view on line y y of Fig. 2. Fig. 5

F`l`is a plan view of the top of said carbureter.

My invention relates to the class of carbureters for `use with internal-combustion cngines to supply the same with the vapors ol hydrocarbon oil, and it consists oi the novel construction and combination of the several parts as hereinafter described and specilically set forth in the claims. l

ln the drawings l represents the case or bodyportion of a carbureter. It is preferably cylindrical and provided with the annular enlargements and sockets 2 and 3 at its upper and lower ends, respectively. It also has an inwardly extending flange 4, thus affording the chambers or spaces 5' and 6, of equal diameters, and the central intermediate chamber or space 7, of less diameter than the l'diameters of the chambers or spaces 5 and 6, but all said chambers or spaces are continuous with each other in the saine axial line. 'llie upper space 5 is the carbureting `chamber, the lower space 6 is the air chainbei' and the central space 7 is the spraying chamber.

A supply pipe 8 conducting air from the external atmosphere is connected to the cai'- bureter case or body 1 in the socket or annular enlargement 2 thereof. A tube or sleeve 9 opens into the carbureter case or bodyl at its upper end onone side and is provided with the annular flange 10, which has an interior screw-thread, as shown in Fig. 2. Apipe 11 has screw-threads at its inner end, which engage the screw-threads of the lange; `10. The pipe 11 conducts the products of the carbureting chamber 5 to the cylinder of the engine in the direction indicated by the arrow 12 in Fig. 2.

Inthe upper socket 3 ol the body or case 1 of which the following Ais a specification,-

a screw cap 13 is mounted and engaged therewith by the screwthreads, as illustrated in Fig. 2, the knurled'flange of said cap ex tending out beyond the upper edge of the annular enlargement 3 of the case or body; This screw-cap has a central depression 14 and web, the latter having a -plurality of apr ertures for the admission of air, as indicated by the arrows 15 and 16.

A throttle valve 17 is mounted fast on rod or pivot 18 in the pipe 9. Said valve is circular, and its diameter equals the diameter of said pipe 9, so as to close said pipe 9 when the valve is in the position shown'in solid lines in Fig. 2.

An air-intake valve 19 is mounted fast on a rod or pivot 20. One end of the pivotal rod 20 is mounted rotatably in the interior annular flange 4' and the opposite end of the pivotal rod 20 passes through said flange and projects out diametrically, as illustrated in Fig. 3. The valve 19 has a 'rectangular opening or aperture 21, shown in top plan in Fig. 3, and indicated by the arrow in Fig. 2. The diameter of the valve 19 is equal to that of the bore of the chamber'7, so that said valve, which is circular, closes said bore (eX cept for the rectangular space 21) when the valve is in the position shown in Fig. 2.

In the chamber or space 6 is the gasolene or oil leed-pipe 23, extending diainetrically across it and passing through bosses 24, 25, as seen in Fig. 4. The bore of this 'pipe is indicated at 26. A stand pipe or discharge pipe 27 extends up from the pipe 23, the bore 2S ol' said pipe 27, opening into the bore 26 of the pipe 23, as seenin Figs. 2 and 4. 'lhe upper end of the bore 28 ol' the stand pipe 27 has a conical depression or valve seat, as seen inl Figs. 2 and 3. The leed pipe 23 at its outer end is closed by a screw plu r 29. Gasolene, or other hydro-carbon oil, ilows from a tank or chamber (not shown) through the feed-pipe 23, and up through and out of the bore 28 ofthe stand pipe 27, iroin which it is drawn by the suction of the piston ol the en-v l interveningradially-extending ribs, as seen in Fig. 2. `Its upper end has avknurled head 32 and its lower endis formed into a conical point 33, which is adapted to close the bore' v28 of the stand pipe 2 'seat thereof.A

in the conical valve An auxiliary air-valve consists of a `circular disk 34,' whose diameter 1s nearly eqlilial to the diameter'of the chamber 5, so t at said disk is movable in said chamber, asy shown in Fig.' 2.

The disk 34 has a tubular stem 35. A cross pin 36 extends through the shank of the needle valve 30. A collar 37 surrounds the shank of the needle valveand rests upon the cross in 36. A spiral spring 38 surrounds the tu ular stem 35 and t which spring abutsthe under surface of the 'disk 34v and-the other end of which abuts the upper surface of the collar 37. From the lcenter of the web or depression of the screwcap 1,3 on the up er side thereof a tube 39, integral therewit extends, wlnch has a screw-threaded bore to engage the threaded portion 31 ofthe needle valve 30.. The spiral spring 38 presses'the disk 34 lnto contact with the undeifsurface' of the screw-cap 13.

vA check nut 4`fts tightly on the'threaded portion 31 of the needle valve shaft and is in `contact with the upper surface of the sleeve or tube 39. -A handle 41 projects from the check nut 40.

A bent or V-shaped'lever 42, 42', hasa I hub 43 at its apex, and is there split, as at 44,

and rovided with two clamping ears 45.

The ub 43 lits upon' the rod or pivot 18 of' the throttle valve 17 and is secured thereto by the screw 46, which draws and tightens the 'clamping ears 45 toward each other.- A

rod 47 is mounted at its end upon a pivot 48 and is held from displacement by a spring pin 49. A lever arm 50 has a hub 51, by

' which itis iitted to the rod or pivot 20, and

'fastened by a spline 52. A link bar 53 is connected to the lever arm 42 by tl1e pivot 54 and to the lever arm 50 by the pivot 55.

The operation of my improved carbureter is as follows: By one pull of the rod 47 in the 19 in opening moves'in the directionrindi-y cated by the arrow. The cross-hatched portion of the valve 19 represented in Fig.-2 constitutes the stop, limitingl the movement o'f the valves 19l and .17 to 90 1n opening, at which limit said portion of the valve 19 comes up into contact with the shank o f the needle valve 30 and can mnvelno farther. The Aneedle valve 30 is in threaded engagee shank of the needle valve, one end of'- ment with the .tube`39L .By turning the head 32 the position of the needlevalve lengthf wise in said tube is adjusted. and thus is deneedle valve extending from-the bottonfrgof the tube 39 toward the conical valvebseinf?" the upper end of the stand pipe 27. `Whcn f l the needle valve 30 has been so adjusted, it

is held by tightening the check nut 40, a ainst the tube 39'. In this manner the desire vent between the conical valve point'33 and. said' valve'seatis. maintained until changed by'L the operator.

The the car ureter and enginenoperative', if it is desired to set the engine in motion, the chauffeur draws the rod 47 in the direction of the arrow 56. This movement of the rod 47 moves the bent lever 42, 42', in the direction indicatedby the arrow 59, and at the same time, by means ef the link connection 53,r 50,

moves the `lever arm 50 in the direction indiarts being, adjusted' as described, and l sc f catedI by the arrow 60. lf-the rod 47 is'.4

drawn to the full extent possible, thei'throt'tle' valve 17 is 'thereby moved fron; the position shown in Fig. 2 in solid lines to the position shown in said figure in dotted lines, and the air valve 19 is moved from the position shown in Fig. 2 to a vertical position (not shown) 909 therefrom. Air from the external atmosphere rushes through the' pipe 8, as indicated by the arrow 58, into the air chamber 6, through the'aperture 21 ofthe valve 19 and into the spraying chamber 7. The gasolene or oil spray is dissipated and eva orated in the chambers 7 and 5 in the wel -known manner, and the carbureted air thus produced passes out through the 'pipe 11 to' the engine, as indicated by the arrow 12.

' It'is'to be observed that the bore or diame' ter of the chamber or space 7 is somewhat less than the bore or diameter of thethroat or pipe 9, so that the suction of the piston of the engine tends to cause a partial vacuum in the carburcting chamber 5, thus facilitating'th'e dissipation of the gasolene or oil spray, and

the result is a uniformity of proportion of thel atmospheric air and the hydrocarbon vapor in the mixture, at all times, and in all operativepositions of the valves 19, 17 to whatever degree or extent said valves may be.

open. n case the suction of the piston exceeds a' predetermined limit, and thereby creates an undesirable vacuum in the carbureter, the pressure of the external atmosphere overcomes the tension of the spring 38, whereupon the disk 34 moves inwardly and allows the outer air to flow into the chamber 5 through the apertures 15 and 16, as'indicated b arrows 1n Fig. 2, until the vacuum is relieve and the spring 38 then closes the disk 34 to the screw-cap -13 again.

In my device above described, the-bores, spaces, or chambers 5, 6, 7 are experimentally tested and determined in 'order to get an exan air chamber,

act relation between the valves 17 and 19, so that the carbureter is balanced, and positive, uniform results are obtained, whereby the product carried to the engine is of the same quality and density and has the same proportion of air and gaseous ingredients at Whatever position or degree of opening the valves 17 and 19 may stand.

I claim as a novel and useful invention and desire to secure by Letters Patent:

1, ln a carburetor, the combination of a case or body portion, a carbureting chamber, a spraying chamber which chambers are within said case or body, means for conducting gasolene to the spraying chamber, an air pipe to conduct atmospheric air to the air chamber, a discharge pipe to conduct the mingled gasolene vapor and air from the carbureting chamber, an

air valve mounted in the spraying chamber adapted to rotate on apivot rod which extends diaietrically across the spraying chamber, a throttle valve located in the discharge pipe of the carburetcr and rotatably mounted on a pivot rod which extends diametrically across said discharge pipe of the carbureter, a V-`shaped lever secured at its apex to the ivot rod of the throttle valve on tlie'outer si( c of the case or body, a lever arm l secured on the pivot rod of the air valve on the outer side of said case or body, a link bar pivotally connectedat its ends respectively to said lever arm and to one end of said V- shaped lever, and a rod pivotally connected to the other end of said V-shaped lever.

2. In a carbureter, the combination of a circular spraying chamber, a circular air valve having a permanent air passage t'hroiigh it which valve has a diameter equal to that ol the chamber, a gasolene-diseharge pipe extending through said valve aperture into said chamber, a needle valve adapted to open and close said discharge pipe, a dialnet rically-arranged pivot rod upon which said air valve is mounted in said chamber, and

l means Jfor rotating said air valve, said valve being so arranged that its solid part opposite l, to said air passage therein when said valve is moved to open position comes into contact with the needle valve to limit the rotation of the valve to 90.

In testimony whereof I alix lily-signature in presence of two witnesses.

JAMES A. MCHARDY.

Witnesses:

WILLiAM E. Pauw, WARREN lt'Pnaon.

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