US1556179A - Combined choke and needle valve control - Google Patents

Description

Oct. 6, 1925 J. R. TITMAN COMBINED CHOKE AND NEEDLE VALVE CONTROL Filed May 13, 1924 M 1 M! ATTO NEY.

Patented Oct. 6, 1925.

UNITED- STATES 1,556,179 TEN OFFICE.

'JACOB RUSSELL 'i rrMAiv, or nA iwAir, NEW JERSEY, ASSIGNOR or ONE-THIRD T .GEoRGn B. TITMAN AND onn'rnmn T0 SHERMAN F. TITMAN, BOTH or BAHWAY,

NEW JERSEY.

Application filed May 13,

. Combined Choke and Needle Valve Con trols, of which the following is a specification.

This invention relates to improved combined choke and needle valve control for carburetors and like devices.-

An object of this invention is to provide I improved means 'for'controlling the needle valve of a carburetor, to thereby regulate the proportion of gaseous fuel of the explosive mixture supplied by the carburetor: .A further-obj ect of the invention isto pro- 7 vide improved means for controlling a choke valve or equivalent of the carburetor.

The usual approved type of carburetor for Ford automobiles comprises a threaded needle valve stem for adjusting by rotational movement the jet of the gasoline or like liquid fuel discharged by the nozzle in the mixing chamber; the carburetor is also provided with achoke in the form of a butterfly valve, located in the main air in let passage leading to the mixing chamber.

" Thebutterfly valve is rotationally mounted on a shaft, one end of which shaft extends exteriorly of the casing of the carburetor, at which exterior. shaft end an arm is attached. To the arm of the butterfly shaft- .Ipf Fig. 1, on a somewhat eiilarged scale; Fig. 3 is as'ectional elevation'on line 33v is connected awire leading to a bell crank,

- or by means of an equivalent connection, to

- effect when pulled the movement of the butterfly valve from its normally open position to its partially or wholly closed posi- 40 tion to prime the motor. A compressional spring, usually acoi legl spring encircling the exteriorshaft end,- serves normally to hold the butterfly valve in its fully open position and to return the butterfly valve to its fully open position from a partially or Wholly closed position; .Usually, the arm of the choke valve is one arm of a bell crank, the other arm of the bell crank being utilized for connection by means of a Wire or equivalent extending forwardly of the radiator to aiford priming of the carburetor when the motor 1s being manually cranked. Pursuant to the preferred forms ofthe invention, the needle valve. control and the I COMBINED CHOKE AND NEEDLE VALVE ('JOITJPItOTI.

1924. ,s riai irol'7i2,992.

regulation of the needle valve and the choke may be simultaneously ,efi'ected to variable extents as desired and to permit independent regulation of either as desired. Such pre- 9 ferred form comprises suitable means car-.

ried by the device for connection'with the stem of the needle valve whereby upon r0- 1 tation of the manipulating member the. needle valve is readily and accuratel set the.

and upon longitudinal movement' 0 manipulating member the extent of' opening andclosing of the choke valve is had in correspondence to the extent of. longitudinal movement of the-manipulating'member andv independently of. the rotary movement of the manipulating member for adjustment of the needle valve.

Further features and objects of the in- I vention will be more fully understood from the following detail description and the accompanying drawings,- in which Fig. 1 is a diagrammatic view, showing in side elevation a carburetor and co-ordin-ated parts of an automotive engine, and repre senting in vertical section the cowl and dash-v board of 'an automobile; Y

" Fig. 2 is a sectional elevation on line 2-2 of Fig. 'I, on a greatly enlarged scale;-

of Fig. 1, on the same scale as Fig 3; and

Fig- 5 is a detail frontelevation of the manipulating-member and a portion of the dash-board.

Referring to Fig. 1, of the drawings, the carburetor is indicatedat 10, which may be of any approved type. The air inlet of the carburetor is shown at 11, which mayb e connected to an air-stove 12, or commun1- cate directly with the atmosphere, as desired. The discharge 13 of the carburetor co nmunicates in any desirable manner -with the inlet 14 of a manifold 15 to the respective cylinders of the explosive engine, indicated generally at 16.

The threaded stem of shown at 17' and is illustrated as provided with any approved adjusting member 18, having a pair of spaced openings.

The choke of the carburetor 1s usually in the form of a butterfly valve, the shaft 19 of which extendsexteriorly of the casing 11 of the inlet of the carburetor, 10, to which shaft 19 is secured the bellcrank 20, having a connection opening '21 in its one arm for regulation from the dash-board side and the I connection. opening 22 for regulation by means of the link 23 fromth'e radiator side. The butterfly valve of the usual Ford carburetor is normally held in its fully open position by means of a spring (not shown).

My improved combined needle valve and.

choke regulator comprises suitable means suchas the fork 23' for coupling with the spaced openings of the. adjusting plate 18 of the valve stem 17 The forked member 23 may be locked to the plate 18 by means of one or more cotter pins 24. Such forked member 23. iscarried'by the sleeve member 25, see also Fig. 2, slidably receiving the end 26 of. the arm 27, as by the provision of the elongated slot 28, 28in the sleeve member 25,'into whioi slots 28, 28 projects the oppositeends of the pin 29, secured to.

the arm 27, as by a tight fit in a perforation adjacent the end 26 of the arm 27.

The manipulating member is shownln Fig. 1 is in the form of a knob 30, see also Fig; 5, secured at the upper end of the arm 31 to extend adjacentthe dash-board 32,

within convenient reach of the operator when seated at the steering 'wheel (not shown). A convenient form of mounting, is by drilling an opening 33- in the dash-board 32, which opening 33 may be slightly larger than the diameter of the arm 31, and also -by forming the opening 34 in the usual partition or dash 35' within the cowl 36 of the automobile and enclosed by the hood 37. The opening 34 is of somewhat enlarged dimension to afford vertical movement of the arm 31, as will appear more fully hereinafter. The manipulating member 30 may be provided with a pointer 38, to indicate its neutral position when standing vertically upward. A turn of the manipulating member '30 and its pointer 38 to the left increases to a corresponding extent the richness of the explosive Inixture,.whereas a turn of opposite faces to the fork 43 of metal or like resilient material, carried at the lower end of the arm 31.

I Preferably,the pivotal connections of the as by the stud 45 having a central recess 46 for receiving the lower end 31 of the arm 31 and a set screw 47 extending through a suitably threaded opening 48 transversely to the recess 46. j

' Suitable connection is provided between I, the arm 31 and the bellcranlc20 of the choke valve of the carburetor 10, as by means of the sleeve 50 having the laterally extending pivot lug 51 forinsertion through a pivot opening in the arm 52-of a suitable bellcrank, such .as is illustrated in Fig. 1, and mounted on the bracket 53 secured tothe partition or dash. 35; the other arm 54 0f such bellcrank is connected to the upper end of the link and the lower end of the link 55 is pivotally connected in the opening 21 of the bellcrank 20 of the choke valve of the carburetor 10. maybe locked pivotally to the lug 51 by means of a cotter pin 56, or the like, and a washer 57 may be employed if necessary.

The length of the sleeve 50 when in abutting relation with the stud 45, for'the desired setting of the arm 31 by means of the set screw 47, is such that when the manipulating member 30 is in its fully depressed usual return spring of the carburetor choke valve to return said choke valve to its fully opened position. Such desired setting is attainedjby the adjustment afforded by the recess 46- of the stud 45 and the set. screw 47.

'As indicated above, the richness or leanness-of the gaseous mixture is attained by rotating the manipulating member 30 either to the right for leanness, as indicated by the arrow'Gfi, see Fig. 1, or to the left for richness.

In such operation, the collar 59 remains in quiescent relation to the bellcrank arm The desired extent of rotation of the stem 17- of the needle valve is attained by the rotative transmission afforded by the The bellcrank arm 52 position, as indicated in Fig. 1, it permits the.

of the conneetion of the pin 29 in the slots 28 accommodates movement of the sleeve member longitudinally of the arm 27 and its end 26, and affords nicety of arcuate setting. of the needle valve corresponding accurat'ely to the extent of the arc of movement-of the manipulating member 30. The fork con- -11BCl31OI1 23' of the arm 27 with the apertured plate 18 of the needle valve stem 17 provides for a rocking movementiof the fork 23' relatively to the plate 18, but substantially without 1055 of arcuate transmission. Such arrangement simplifies the assembly and mounting of the device, without sacrifice of accuracy of setting.

For convenience of construction and directness 'of operation, the fork 23 may be pivotally carried at the end of the sleeve member 25, for which purpose,-th sleeve member may be formed of a tube, its opposite slots 28, 28 cut by a circular rip saw and its lower end open-slotted and flat tened to receive the bod}, portion of the fork v '23 and thereafter pinched toem'brace the same.

The choke valve ofthe carburetor is regulated by axial or longitudinal movement of the arm 31, namely by the operator pulling the manipulating member 30 in the direction of the arrow 61, see Fig. 1, thereby actuating the collar50 in the corresponding direction as the 'arrow 60, and to-correspond in'g extent by reason of the stud engaging the collar and serving as astop means therefor, whereby the bellcrank arm 52 is}- oscillated and the wire 55 or equivalent is correspondingly displaced to rotate the bell-,

crank 20 of the choke valve of the carburetor '10, also to a corresponding extent. By reason of the device being fulcrumed at its opposite ends, the opening 23 in the partit1on 35 iselongated vertically. From the above, it will appear that upon completing the priming of the motor as when starting the motor, the operator depresses the -.manipulating member 30, with or without turning the manipulating member 3O, whereby the arm means comprising the upper arm and the lower arm is reduced in efi'ective length by its mutually-sliding. members, and;

effects the movement of thestop'means or Stud 45 to afl'ord a return of the sleeve 50 and the arm 20 of thecarburetor choke valve to return the choke valve to its fully open position under action of its return From-the above, it will be-observed that my control afiords-when desired the joint operation of the needle valve of the 'carbu-- rotor and of the choke valve of-the carburetor to such extents of either as-may be desired when priming or otherwise controlling the motor, as well as to-afiord independent operation of the needle jvalve and ,independentoperation of the choke valve.

The provision of a single stop means for the sleeve controlling the choke Valve for exerting a pull on the wire 55 of the choke is advantageous, in that the installation of my control device involves "the simple adjilstment of the length of the arm 31 by the setscrew 4:7, wherebyjthe stud 45- is brought --into abutting relation with the sleeve 50,

as hereinabove set forth, when the arm means 1s reduced to its minimum effective len h.

on the arm- 31 on the side of the sleeve 50 opposite to that 'of the stud. A5, enablesthe parts of my control devicewhen the in'anipue ,lating member is depressed by the operator tobe speedily returned to its fully returned position, the return spring of the choke valve of the carburetor positively assisting in the return movement of the parts of my control device and as well returning the choke valve to its fully open position in a' e absence of any stop for the sleeve 50 p minimum period of time, thus obviating any tendency of the carburetor to flood.-

Whereas, I have descrlbed my invention by reference to specific forms thereof, it will i be understood" that many changes and modifications may be made without departing from the spirit of the invention,

I claim l Y 1. An adjusting device for a carburetor provided with a rotatably adjustable needle valve stem'and a choke, comprising an arm,

a manipulating member secured-atone end' i of said arm for setting'said arm, arm means 'pivotally connected at one of its ends to said rotatably adjustable needle-valve stem, said arm means comprising telescopically related members, rotation transmitting connection ineansconnecting the otherend of saidarm means with "the other end of. said first-named arm, means rotatably loosely mounted on said device for operating said choke and stop means for limiting the movement of said choke operating means axially of said named arm. 2. An adjusting device for a carburetor provided with a rotatably adjustable needle valve stem and a choke, comprising an arm,

a manipulating member secured at one end ofsaid arm \for setting said arm, arm means pivotally connected at one of its ends-to said rotably adjustable needle valve stem, said arm means comprising telescopically related members, rotation transmittin connection means connecting the other en of said arm 7 means with'the other end of said first-named arm, sleeve means rotatably loosely mounted on said device for operating said choke and stopmeans carried by said first-named arm for limiting the movement of said choke operating sleeve means axially of said firstnamed arm.

stem, .said arm means comprising telescopically related members, rotation transmitting connection'means connecting the other end of said arm means with the other end of said first-named arm, means rotatably mounted on saiddevice for operating said choke and stop means for limiting the movement of said choke operating mean axially of said first named arm. I

4. An adjusting device for a carburetor provided With a rotatably adjustable needle valve stem and a choke, comprising an arm,

a manipulating member secured at one end of said arm for setting said arm, means adjacent the other end of said arm for adjusting the eifective length of said arm, arm

- mally holding means pivotally connected at one of its ends to said rotatably adjustable needle valve stem, said arm means comprising telescopically related members, rotation transmitting connection means connecting the other end of said arm means with the other end of said first-named arm, means rotatably loosely mounted on said first-named arm for operating said choke operating. means axially of said device, and stop means for limiting the movement of said choke operating means axially of said first named arm.

5. An adjusting device for a carburetor provided With a rotatably adjustable needle valve stem and .a choke, comprising an arm means, a manipulating. member secured at one end of said arm means for setting 'said arm means, means adjacent the other end of said arm means for adjusting the eiiective length of said arm means, means at one end of said arm means for pivotal connection With said rotatably adjustable needle valve stem, said arm means; further comprising telescopically related members, rotation transmitting, connection means for said arm means, means rotatably loosely mounted on said devicefon operating said choke and stop means carried by said arm means for limiting the movement of said choke operating means axially of said arm means.

6. An. adjusting device for carburetors provided with a rotatably adjustable needle valve stem and a choke having a spring norsaid choke in itsopen position, comprising arm means, a manipulating member secured adjacent one end of said arm for imparting at Will either rotational or axial displacement or both to said arm means, said arm-means comprising telescopically related members for securing varying effective length of said arm means incidentupon axial displacement of said manipulating member, .articulated means for said arm means for transmitting rotational movement to said adjustable needle v valve stem, means freely rotatably'mounted on said arm means for operating said choke and a stop carried by said arm means, said stop being disposed between said choke operating means and said articulated means whereby upon axial displacement of said manipulating member-in the direction from said carburetor said stop serves to limit the movement of said choke operating means axiallyv of said arm means, said arm means being free-from any stop for said choke operating means in the opposite direction of axial displacement.

7-. An adjusting device for carburetors provided Witha rotatably adjustable needle valve stem and achoke having a spring normally holding said choke in its open posi tion, comprising arm means, a manipulating member secured adjacent one end of said arm means for imparting at will either rotational or axial displacement or both to said arm means, said arm-means comprising telescopically-related members for securing varying efi'ective' length of said arm meansv incident uponaxial displacement of said-ma- I l nipulating member,- articulated means for said arm means for transmitting rotational movement-"to said adjustable needle valve stem, a collar loosely mounted on said arm means for operating said choke and a stop carried by said arm means, said stop'being disposed between said collar and said articulated means whereby .upon axial displace-- ment of said manipulating member in the direction from said carburetor said stop serves to limit the movement of said collar axially of said-arm means, said arm means being free from any stop for said collar in the opposite direction of axial displacement.

8. The combination With a carburetor provided With a rotatably adjustable needle valve stem and a choke having aspring tending to \resiliently return said choke to its open position; of an adjusting device havinga manipulating membcrit'or regulating to any desired extent the ad ustment of said needle valve by rotary movement and for setting said choke at any desired extent by axial displacement, arm means carrying said manipulating member at its one end, means at the opposite end of said arm means for pivotal connection With said rotatably adjustable needle valve stem, said arm means comprising telescopically related sliding members for attainingv variable effective length of said arm means incidentupon axial displacement of said manipulating member,

- placement rotation transmitting articulated meansfor said arm means for efi'ectingrotational disof said rotatably adjustable needle valve stem, a collar rotatably loosely mounted on sa'idarm, means to afford rotational movement of s'aidarm means freely of said collar, means connecting said collar with said choke for operating said choke upon axial displacement of said collar in'one direction and "stop means on said arm means for engaging said collar when sald manipulating member and therewith said arm means are position; of an adjusting device having a manipulating member for regulating to any desired extent the adjustment of said needle valve by rotary movement and for setting.

said choke at any desired extent by axial displacement, arm means carrying said manipulating member at its one end, means at the opposite end of said arm means for pivotal connection with said rotatably adjustable needle valve stem,

said arm means comprising telescopically related members for attaining variable effective length of said arm means incident upon axial displacement I of said manipulating member, rotation transmitting articulated means for saidfiarm, means for efiecting rotational displacement of said rotatably adjustable needle valve stem,- a collar rotatably loosely mounted on saidarm means to afford rotational movement of said arm means freely of said collar, means connecting said collar with said choke for operating said choke upon axial displacement of said collar in one direction and stop means on said arm means for engaging said collar when said manipulating member and therewith said-arm means are axially displaced in said one direction,.said arm; means being free of-any stop forsaid collar in its opposite axial displacement and thereby I "operate said choke to any desiredextent independently of the extent of adjustment of 1 said needle valve stem. g-In testimon V specification t is 25th 'day of Apri 1924 J. RUSSELL TITMAN.

whereoflghave .si ed this i

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