US 2783984 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
March 5, 1957 v. J. KRAMER 2,733,984
DUAL THROTTLE AND CHOKE CONTROL ATTACHMENT Filed Opt. 12, 1953' 2 ShetS-Sheet 1 F /'g.2 Fig. 2 20 I2 gg/e28 24 52 l I8 I 50 o 20 0 32 64 O //0 I 6 T 48 I 73 78 I g /0 04 J 8 44 0 80 i! 34 j? 90 36 3a 42 g 9 INVENTOR.
Vernon John Kramer March 5, 1957 v. J. KRAMER 2,783,984
DUAL THROTTLE AND CHOKE CONTROL ATTACHMENT Filed Oct. 12, 1953 2 Sheets-Sheet 2 Fig. 7
1 BY mt W3 Attorneys Vernon John Kramer DUAL THROTTLE AN 1) CHOKE CONTROL ATTACI-HVIENT Vernon John Kramer, Doon, Iowa Application October 12, 1953, Serial No. 385,354 1 Claim. (Cl. 261-64) This invention relates generally to automotive attachments and pertains more particularly to an attachment for permitting manual control of normally thermostatically controlled carburetor chokes.
A primary object of this invention is to provide an improved attachment for conventional carburetors which enables an operator to manually set the usual choke valve of a carburetor in a manner most desirable under any existing conditions and to override the usual automatic choke.
Another object of this invention is to provide an improved control attachment for carburetors which will permit the conventional thermostatic choke control to operate in the usual manner while permitting the choke to be adjusted manually to fit unusual or emergency conditions.
These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:
Figure 1 is a front elevational view of a conventional carburetor showing one form of the attachment mounted thereon;
Figure 2 is a side elevational view of the assembly shown in Figure 1;
Figure 3 is a top plan view of the assembly shown in Figures 1 and 2;
Figure 4 is an enlarged vertical section taken through a portion of the attachment;
Figure 5 is a horizontal section taken through a portion of the attachment showing details on enlarged scale;
Figure 6 is an enlarged vertical section taken along section line 6-6 of Figure 11 of the assembly;
Figure 7 is a side elevational view showing a modified form of attachment;
Figure 8 is an enlarged interconnecting linkage;
Figure 9 is an enlarged perspective view of the anchor plate assembly;
Figure 10 is an enlarged perspective view of a clamping element to be utilized on the anchor plate shown in Figure 9; and
Figure 11 is an enlarged perspective view of the throttle linkage arm connection showing the same in exploded relation.
Referring now more particularly to the drawings, the reference numeral 19 indicates generally a carburetor of any conventional construction which includes upper and lower sections, the upper of which embodies the air horn 12 and the float bowl cover member 14 as well as the choke butterfly valve 16 mounted on the transverse actuating shaft 18 and the usual thermostatic control 2t) associated with the shaft 18 in a manner well understood in the art. The upper section also includes a finger member 22 rigidly secured to the shaft 18 and an idler member 24 journaled on the shaft with the finger 22 being provided perspective of a portion of the nited States Patent 0 with a horizontally extending ear portion engageable with the circumferentially spaced radial ears 26 and 28 on the idler member 24. The free end of the idler member is provided with an aperture which pivotally receives a post member 30 for securement to a Bowden wire member 32 in the manner shown and as is well understood in this art.
The lower section of the carburetor includes the conventional riser portion 34 having a mounting flange 36 adapted for securement to the associated intake manifold of an internal combustion engine. and this riser isprovided with a transverse. shaft, member 38 having the throttle control butterfly valve mounted thereon and is also provided with a post 40 upon which the fast idle cam member 42 is received. The lower section also includes the conventional float bowl assembly or portion 44 and it is to be understood that the upper and lower sections are conventionally secured together, that is, by means of fastening elements or bolts such as those indicated by the reference character 46.
A bracket or anchor plate assembly indicated generally by the reference character 48. forms an attachment for the carburetor and includes an arcuate arm portion extending laterally from the main body portion 52 thereof and the extremity of this arm is provided with an aperture 54 which, taken in conjunction with the aperture 56 at the juncture between the arm and the main body portion is adapted to receive a pair of the previously mentioned fastening elements 46 for securing this assembly to the carburetor body. An elongated slot 58 is provided in the main body portion 52 and this slot is adapted to receive a fastening assembly 60 which, also extending through the assembly 62 will clamp the outer sheath 64 of a Bowden wire control assembly to the main body portion 54. The assembly 62, as seen most clearly in Figure 10, is formed of an elongated plate-like element having a central portion at one end struck down to provide a foot member 66 and a pair of bifurcated legs 68 in the manner shown and the opposite end of the assembly is formed downwardly in an arcuate manner as indicated by the reference character 70 for engaging the previously mentioned sheath 64. The assembly 62 is provided at an intermediate point with an aperture 72 through which the previously mentioned fastening element 60 projects.
The anchor plate assembly 48 is also provided with a depending flangeportion 74 adapted to be positioned at the rear of the carburetor in the manner shown and this flange is provided with an elongated slot 76 to receive a fastening element for securing another of the assemblies 62 thereon by means of which another Bowden wire assembly indicated generally by the reference character 78 may be rigidly secured to the carburetor.
The latter Bowden wire 78 includes the flexible actuating element 80 provided with an enlarged removable element 82 at its free end in the manner shown most clearly in Figure 6, this element being removably positioned on the wire element as by the set screw 84. A clamping arm such as that illustrated in Figure 11 is adapted to be rigidly secured to a conventional throttle actuating link 86 by virtue of its clamping jaw portions 83 and 90, each of which includes an arcuate trough portion 92 and which are provided with registering apertures 94 for the reception of a suitable fastener element for clampingly securing these members together to grip the link 86. The clamping arm includes an elongated shank portion 96 having a laterally projecting car 98 at the upper edge of its extremity, which car is provided with an aperture 100 for receiving the previously mentioned Bowden wire element 80.
In this manner, it will be manifest that each of the Bowden wire assemblies are positioned for manual manipulation from the interior of an associated vehicle such that manipulation of the assembly 78 will effect faster or slower idling of the associated internal combustion engine and manipulation of the other of the Bowden wire assemblies will effect the desired setting of the choke assembly in the air horn 12 when the wire 32 has been manipulated such that the car 26 is in engagement with the arm 22 to rotate the shaft 18 to the desired position. However, it will be further noted that the assembly for operating the choke may be positioned in a neutral position such that normal movement and operation of the conventional automatic choke assembly is not impaired.
The throttle link 86 is connected through the usual bell crank member 102 to the shaft 38 and is provided with an adjusting screw 104 for adjustably abutting the fast idle cam or stop member 42.
Referring now more particularly to Figure 7 wherein a modified form of construction is shown, it will be noted that the anchor plate assembly 48 may be utilized in conjunction with but a single choke control Bowden wire assembly 106 by utilizing the linkage assembly indicated generally by the reference character 108. linkage assembly includes an upper link member 110 which is provided with a laterally projecting free end portion pivotally received within a suitable aperture in the previously described ear member 28 on the idler assembly 24. The opposite end of the link 110 is threaded as indicated by the reference character 112 and projects through a laterally projecting ear portion 114 of an L- shaped link member indicated generally by the reference character 116. This latter link also includes an elongated shank portion 118 provided with an aperture at its extremity by means of which it is pivotally secured to the fast idle cam member 42 as by a suitable fastener 120. The links 110 and 118 are adjustably secured together for effecting the desired relationship between the fast idle cam 42 and the idler member 24 by means of manipulating the lock nuts 122 disposed on the link 110.
It will be manifest that the anchor plate assembly 48 may be utilized either with the single or dual control Bowden wire elements, dependent upon the utilization of the linkage assembly 108. By utilizing the linkage system 108, the necessity for providing the separate throttle control assembly 78 is obviated inasmuch as the manipulation of the control assembly 106 will automatically properly position the fast idler cam 42 for the desired engine idle speed.
From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since This numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the in vention to the exact construction shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claim.
What is claimed as new is as follows:
A control attachment for carburetors having an air horn, a float bowl with a cover, a chokevalve control member, a fast idle cam member for determining the idle position of the throttle valve control member for varying the idle speed of the internal combustion engine, said attachment comprising an adjustable linkage interconnecting the choke valve control member and the cam member for simultaneous movement thereof, a Bowden wire having a sheath attached to the choke valve control member for manual adjustment thereof, and means adjustably mounting the Bowden wire on the cover of the float bowl, said means including an anchor plate having a main body portion provided with a slot therein, an arcuate project-ion generally conforming to the shape of the air horn for disposition adjacent the periphery of the air horn for attachment to the cover of the float bowl, a clamping element mounted on said main body portion of the anchor plate, a fastener extending through the clamping element and the slot in the main body portion of the anchor plate for adjustably securing the clamping element to the anchor plate, said clamping element having a downwardly extending foot member at one end thereof for engagement with the upper surface of the anchor plate, the other end of said clamping element being downwardly curved for engaging a portion of the periphery of the sheath of the Bowden wire, said fastener being adjustable for clamping the Bowden wire and securing the clamping element and Bowden wire in adjusted position for supporting the Bowden wire adjacent to the choke valve control member for preventing flexing of the Bowden wire.
References Cited in the file of this patent UNITED STATES PATENTS 1,784,481 Bicknell Dec. 9, 1930 2,003,403 Timian June 4, 1935 2,004,242 Heitger June 11, 1935 2,010,206 Timian Aug. 6, 1935 2,352,823 Ellinwood July 4, 1944 2,423,059 Winkler June 24, 1947 2,426,272 Hennemann Aug. 26, 1947