US1752817A - Carburetor-controlling device - Google Patents

Description

April 1, 1930. c. w. 5pm-m 1,752,817

I CARBURETOR cNToLLING DEVICE FiledJan. 25. 1926 Patented Apr. 1, 1930 f UNITED STATES PATENT OF-FICE" CAnL w. sPoIIn, or CHICAGO, ILLINoIs,AssICNon To WILLIAMS, CAMP AND PRAD- Y BURY, on CHICAGO, ILLINoIs, A @PARTNERSHIP CoMPosiin CP LYNN A. WIL- LIAMs, CURTIS P.. CAMP, AND CLIFFORD C. BRADBURY CARBURETOR-CONTBOQLLING DEVICEl My invention relates to control device for use with choke valves of the carburetor of internal combustion engines, especially as used on automotive vehicles.

It is an object of my invention to provide a simple choke valve control device in which ne adjustments of the choke valve may be accurately made and in which the tendency of the control wire to bind in its guiding tube 1o is practically eliminated.

Other objects will appear from the followingdescription, reference being made to the accompanying' drawings in which Fig. 1 is a front elevation; and,

Fig. 2 is a bottom plan view.

As showny in the drawings, the supporting bracket 3 is secured by bolts 4 to an automobile instrument board 5 at its lower edge.

An arm 3a, projecting rearwardly from the bracket 3, is vertically drilled at its end to receive a at headed pin 6, upon which the control lever 7 is pivoted. A spring 8, coiled aroundl the pin 6, is compressed between the lower surface of the lever and a washer 9, which may be grooved or flanged so as to form a vsecure seat for the end of the spring 8. Any suitable means, such as the Cotter pin 10, may be employed to hold the washer in position. This spring is for the p urpose of providing a small amount of friction between the lever 7 and the bracket 3b so as to prevent the lever`from being displaced by the vibrations of the automobile.

The usual brass tube 11, which serves as a guide for the resilient actuating wire 12, is secured in a clamp 13 which is fastened to the flange 3b by a screw 14. The clamp 13 has a downwardly projecting iange 13a which engages the edge ofthe flange 3b and prevents rotative movement of the clamp.

It is to be understood that one end of the wire 12 is connected to the carburetor air intake or choke valve in the usual manner. The if; other end is secured to the lever 7 tting into a hole drilled perpendicularly to the longitudinal axis of the lever, and secured thereto by a set screwV 15. The end of the wire 12 will thus be held in a position tangential to the arc through which the point at which it is attached to the lever 7 travels as thelever is swung on its pivot pin 6.

. It will be noted that the tube 11 is bent along the arc of the circle, having its center at the pivot point of the lever 7 and having a radius equal to the distance between the pivot point and the point at which the wire 12 is attached to the lever 7. Thus the wire 12 will also be bent into an arc of Vthis circle since thehole inthe lever 7 in which its end is held is tangential to `this arc. `The usual tendency of the wire to bind and buckle is thus eliminated. Y The lever'7 `extends throughza slot 3.. in the bracket 3 and terminates in an enlarged lingerl piece 7u. The face of the bracket is graduated adjacent the slot 3 and on indicia Lean-Rich 'raised on the face of the bracket to aid in the proper positioning of the lever. In the use of the device, the air inlet or choke valve may be easily adjusted to suit weather and other variable conditions of operation and will be held injadjusted position by the friction caused by the pressure of spring 8 and by the friction of the wire 12 in its tube 11.

l/Vhile the device is shown rand described as attached to the actuating end of the con- Y trol wire, it will be apparent that it may also be used at the actuated end of the control wire, at' the carburetor or similar device.

Suitable changes would be necessary in the design of the device in such instances to adapt it for the particular use to which it may be put, but such changes in design may be readily made by any skilled mechanic. Itis therefore not considered necessary to showor de* scribe the possible varieties of constructions in which my invention may be embodied. The principles of my invention may be utilized in any construction whereit is desired to mechanically connect a pivotallymovable part with another element by a guided resilient wire.

l/Vhile the form of mechanism herein shown and described is admirably adapted to fulfill the objects primarily stated, it is to be eX- pressly understood that it is not intended to confine the invention to the one use or to the one form of embodiment herein disclosed and Vthat the invention is susceptible of embodiment in various forms, and use in various connections, all coming Within the scope of the claims Which follow.

I claim: y

1. In a device of the class described, a bracket, a control levervr pivoted to said bracket and pressed into frictional Contact Y therewith, an arcuate guide tube fixed to said bracket, a resilient control Wire guided Within said tube and having its end projecting therefrom, and means to secure the end only of said Wire to said lever so as to hold the portion projecting from the tube in arcuate shape to facilitate reciprocation of said Wire in said tube.

2. In a device of the class described, the coinbinationof a bracket, a control lever pivotally mounted on said bracket, a flexible control Wire, an arcuate guide tube therefor secured to said bracket and having its curvature concentric with the axis ofisaid lever, said lever having transverse bore therethrough having its axis tangential to the arcuate `path of the lever at that point Jfor receiving the end only of said flexible Wire to hold the Wire in arcuate shape to coincide with the curvature oi said guide tube.

In Witness whereof, I hereunto subscribe my name this 21 day of January, 1926.

" CARL W. SPOHR.

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