US1335537A - Needle-valve for carbureters - Google Patents

Description

l. T. SWARTZ NEEDLE VALVE FOR CARBURETERS.

APPLICATION FILED NOV. 15, 1918.

. Patented Mar. 30, 1920.

Fig.2.

I INV NTOR. Z1, 3

WITNESS: Wm 24 7 7. ATTORNES v ETNKTEEED Sii fiiii hlS @FFEQE.

IRA 'I. SWARTZ, OF INDIANAPQLIS, INDIANA, ASSIGNOB, '10 SW'ARTZ ELECTRIC COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION QF INDIANA.

NEEDLE-VAL JE FOR CARBURETEPJS.

Application filed November 15, 1918.

To all whom it may concern:

Be it known that I, IRA T. Swaa'rz, a citizen of the United States, residing at Indianapolis, Marion county, and State of Indiana, have invented and discovered certain new and useful Improvements in Needle-Valves for Carburetors, of which the following is a specification.

My invention relates to needle valves for carbureters and its objects are to provide means to enable the needle valve to be adjusted to its proper feeding position without the necessity of taking the carbureter apart, to limit the ran e of adjustment by a stop so that the stem of the valve will not be turned beyond the circle of rotation within which it is set originally thereby preventing the user from losing the original point of adjustment, and to provide for indicating the proper and normal point of adjustment of the valve.

With these objects in view my invention is embodied in preferable form in the construction hereinafter described and illustrated in the accompanying drawings.

In these drawings, Figure 1 is a longitudinal section through a carburetershowing my invention applied thereto, and 2, is a perspective View of the holding and stopping means for the valve stem.

Referring to the drawings, 1 indicates the liquid fuel containing chamber of a carbureter of usual construction and 2, the mixing chamber. Mounted in the wall between the two chambers is a gasolene feed pipe 3 within which is .mounted adjustable needle valve 4: adapted to control the exit opening 5 from the end of the pipe 3. The valve stem 6 of the needle valve projects through the wall of the carbureter to the outside thereof and on its end is provided with a knurled finger wheel or disk 7 whereby the valve stem is adapted to be rotated so as to draw the valve away from or toward the opening 5 to increase or decrease the flow of gasolene, such rotatable movement being efiected by the engagement of the screw threads 8 on the stem with suitable interior threads in a bushing 9. Fixed in the bushing 9 by nut 10 is an angled disk detent member including a spring arm 11. This arm projects out to a point opposite the sur face of the operating disk and is there pro vided with a projecting detent catch 12 adapted to engage the recesses between the Specification of Letters Patent. v Patented Blair. 39, 1920.

Serial No. 262,738.

13 which is adapted to make contact against either side of the arm 11 in a rotatable adjustment of the disk. I

The operation of the device is as follows: Before the carburetor is sent out the needle valve is adjusted to the normal feeding position thereof. The stop pin 13 and the spring detent arm 11 are so located relatively to the needle valve that in this normal, original position of adjustment the stop pin will be diametrically opposite the tooth or catch of the detent arm as shown in Fig. 1. From this normal, original point of adjustment it is usually necessary to project the needle valve within the range of the movement permitted by the rotation of the operating disk throughout one revolution of the latter. The stop pin from such adjusting movement will be carried against either side of the spring arm 11, thus preventing the turning of the disk to a point beyond. such single revolution and thus avoiding the loss of the location of the original zero point of adjustment, In any adjustment of the disk the detent catch at the end of the spring arm 11 will engage the teeth on the k1 urled periphery of the disk holding the same firmly in position and preventing any accidental displacement of the disk and valve. Should it be necessary for any unusual reason to turn the stop pin on the disk farther than one revolution, this.

may be done by pressing back the spring detent arm 11 and moving stop 13 past the same.

Having thus described my invention, what I claim is:

1. In a carburetor, in combination with a needle valve, a spring detent for holding it in adjusted position and stop means cooperating with said spring detent for limiting the adjustment within a predetermined range of movement, said spring detent being adapted to be moved past said stop.

2. In a carbureter, in combination with a needle valve, and its stem, a knurled disk on the stem exteriorof the carbureter, a spring detent for engaging the periphery of the disk and a stop pin projecting from the periphery of the disk and adapted to contact With said detent to limit the range of adjustment of the disk and Valve, said spring detent being adapted to be moved past said stop.

In Witness whereof I have hereunto set my hand and seal at Indianapolis this 20 10 day of September, A. D. nineteen hundred and eighteen.

IRA T. SVVARTZ. [1. s]

Witnesses: I

M. L. SHULER, H. P. DOOLITTLE.

Images