US2764393A - Manually actuated control attachment for automatic choke - Google Patents

Description

Sept. 25, 1956 c. F. GEYER 2,764,393

MNUALLY ACTUATED CONTROL ATTACHMENT FOR AUTOMATIC CHOKE Filed May 14, 1954 f 4o Charles l". GGL/er BY ATTORNEY MANUALLY ACTUATED CONTROL ATTACH- MENT FOR AUTOMATIC CHOKE Charles F. Geyer, Hellertown, Pa. Application May 14, 1954, Serial No. 429,898

1 Claim. (Cl. 261-64) rThis invention relates to a control device for chokes for internal combustion engines, and particularly relates lto a choke control which can be used yto manually regulate an automatic type choke when, for some reason, the :automatic mechanism fails to function properly.

The control device embodied in this invention may be used with any of the conventional automatic choke type of engine carburetors, `the Carter type being here illustrated as an example.

lt has heretofore been attempted to provide -a manually actuated control device for automatic chokes, ybujt all of `these prior art mechanisms lhave lacked the means to provide a positive opening and a positive closing movement o-f the choke. They have lalso had the disadvantage of interfering with the automatic operation of the choke during its normal operation. Furthermore, they have required a permanent attachment between the manual control and the choke assembly which necessitated a great amount of modification of the choke mechanism with a consequent large increase in cost of manufacture and assembly. in addition, the expense of repairs rand replacements was practically prohibitive.

One object of this invention, therefore, is to provide a manually actuated control device for automatic chokes which acts to positively open and close the choke.

Another object of this invention is to provide `a manual control for automatic chokes which is easily connected to and removable from any of the conventional carburetor mechanisms, and which does not require any alteration of such mechanisms.

Another object of this invention is to provide a manual control for automatic chokes which does not in any way interfere with the normal operation of the automatic choke.

Another object of this invention is `to provide a manual control for .automatic chokes which is compact .and which consists of relatively few parts.

Other objects of `this invention are to provide an improved manually actuated control device for automatic chokes which is easily and economically produced, which is sturdy in construction, and which is highly -eicient in operation.

With the above and related objects in View, this invention consists in the details of -construction and combination of parts as will be more fully understood from the following description, when read in conjunction with the accompanying drawing in which:

Fig. l is a perspective view of a device embodying the present invention, showing the `device mounted on a typical automatic choke mechanism, shown in dotted outline, wherein the device is in neutral position.

Fig. 2 is a fragmentary side view, partly in elevation and partly in section, of the manual control means illustrated in Fig. l.

Fig. 3 is a side view, partly in elevation and partly in section, of the choke control when in a position to close the choke.

ited States Patent ice Fig. 4 is a view similar to, Fig. 3, but showing the `mechanism in choke opening position.

Referring now in greater `detail to the drawing wherein similar reference characters refer to similar parts, there is shown a conventional internal combustion engine carburetor 10 comprising a housing 12 in which is provided a butterily choke valve 14 mounted on a pivot rod 16 which extends into the conventional `thermostat housing 18 in which is provid-ed a conventional thermostat coil, not shown. The rod is attached to the coil for actuation thereby, all in a manner well known.

The control means which embodies the present invention is indicated generally lat 20 and comprises Ia bracket 22 either lformed integral with or separably connected to the carburetor housing 12. A rod 24 is provided with an olf-set end 26 which is fixed Vin an opening 28 in the bracket 22. The opposite end of the rod 24 supports va control member, generally indicated as 30, for pivotal movement thereon. This-member 30 comprises 1a pair of oppositely inclined end rlingers 32 and 34, which combine lto forma generally V-s-haped member, and a middle finger 36 bisecting the angle between the two end iingers.

Each of the endlingers forms a rocking arm and is provided with Ia lseries of openings asy at 38 in the linger 32 and as at 40 in the finger 34. Each of these openings isl adapted to receive a v,set-screw 42 which co-acts with a lock-nut 44 in adjusted positions longitudinally of the nger. The set-screw receiving openings are provided in both end fingers so that the control member can be mounted on the'od 24 in any position and whichever of the end fingers is uppermost can be used as the :actuating control finger.

The lock-nut 44 is provided with the ordinary screwthreaded hole 46 for receiving lthe set-screw .and is also provided with an intersecting bore 48 for receiving a control cable 50. The set-screw 42 also locks this cable into position on the finger l32.

The cable 50 is movable in a flexible casing 52 which is supported at one end by an oil-set position 54 on the bracket 22 and at the other end by ya sleeve `56 -to which it is connected. The sleeve 56 is connected `to the engine side of the instrument board 58 of an automobile by means of screws 60 co-acting with `a flange 62 on the sleeve.

The cable 50 extends -into the sleeve 56 and is connected to a rod 64 which extends Ithrough the sleeve and through coinciding openings in the flange 62 yand instrument lboard 58 into the drivers compartment. A control knob 66 is provided on the end of the rod within easy access of 'the driver. The rod 64 is provided with a pair of spaced circumferential grooves, as at 68 and 70, each of these grooves being adapted lto receive a detent 72 formed on the end of a spring finger 74 mounted on the sleeve 56 as at 76.

The control member 30 controls the position of the valve 14 through a pin 78 fixed on a lever 80, this lever bein-g connected with the rod 16 through a link 82. The lever 80 is ordinarily controlled by the conventional automatic choke valve when the manual control is in neutral or non-operative position as `shown in Fig. l. In this position, the knob 66 is pulled back sufficiently to permit the `detent 72 to engage in groove 68 in the rod 64. In this position, the pin 718 is free to move vertically between the fingers 34 `and 36. When Iit is desired to close the choke valve, the knob 66 is pulled completely back, thereby bringing the finger 36 out of the vertical path of the pin 78 :and allowing the finger 34 `to move the pin, and consequent-ly the lever 80, up to the posi-tion where it acts to close the valve, as

illustrated in Fig. 3. When it is desired to open the valve,

the knob 66 is pushed completely in to the position where the detent 72 engages in the groove 70. In this position, as illustrated in Fig. 4, `the iinger 34 is moved out of the path of the pin 78 and the finger 36 is :allowed to move the pin and lever downwardly so as to cause the valve to open. A

The adjustability of the connection between `the cable 50 and control member 30 by means of the series of openings 38 permits the -throw of `the control or rocking member 30 to be varied according to conditions.

Although this invention has been describedy in considerable detail, such description is intended as being illustrative rather than limiting since the invention may be variously embodied, and the scope of the invention is to be determined as claimed.

Having thus set forth and disclosed the nature of this invention, what is claimed is:

A manual control actuator attachment for automobile engine automatic choke valves wherein `the choke valve is pivotally mounted within a carburetor, said device cornprising a housing adapted to be connected to the instrument board of the automobile at one end and having the other end thereof extending toward 'the carburetor, said actuator `attachment including an axially movable rod extending into said housing and through an opening in the instrument board, axially spaced grooves on said rod, a knob on one end of said rod :at one side of said instrument board, a flexible cable connected to `the opposite end of said rod within said housing, a spring nger fixed on said housing 'and adapted to removably engage within each of said grooves, la flexible casing connected `to said housing at one end and fixed lto a support on the carburetor at the opposite end thereof, said cable being longitudinally movable within said casing and extending beyond said casing at either end, a rocking memposed in a common plane and adapted to be pivotally mounted adjacent the carburetor for oscillation in said common plane, a pivot, on which said rocking member oscillates, yadapted to be mounted on said carburetor in longitudinal parallelism with the mounting pivot of the carburetor choke valve for synchronous `actuation thereof 4through said arms, said cable being connected to said rocking member simultaneously to rock all of said arms upon longitudinal movement of said cable, linkage operatively connected to said valve for pivoting said valve upon movement of said linkage, and means separably connecting said linkage to one or another of said arms, depending on the position of rocking yadjustment of said arms, to enable said arms to control the position of said valve within the carburetor, said rocking member comprising a generally V-shaped member having a pair of diverging end fingers and a center nger substantially bisecting the angle between said end iingers, each of said end fingers being provided with la series of openings for receiving a connecting means adapted to connect one end of the cable to the rocking member.

References Cited in the le of this patent UNITED STATES PATENTS 1,267,314 Brogniez May 2l, 1918 1,442,632 Shortt Jan. 16, 1923 1,503,918 Ruby Aug. 5, 1924 1,811,011 Heitger June 23, 1931 2,017,890 Bracke Oct. 22, 1935 2,065,167 Wirth et al. Dec. 22, 1936 2,558,471 Whitlock June 26, 1951

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