USRE22385E

USRE22385E - coffey r

Info

Publication number: USRE22385E
Authority: US
Publication date: 1943-10-26

Description

l. E, COFFEY AUTOMATIC STARTING DEVICE 4 Sheets-Sheet l I Ox iginal Filed April 15, 1938 Irv ant- C %7? /f Oct. 26, 1943. 1. a COFFEY I AUTOMATIC STARTING DEVICE v Original Filed April 15 1958 4 Sheets-Sheet 2 In uenh) r uerv Z? Co/fe mum lIIIII/l \A xi Oct. 26, 1943. 1. E. COFFEY I I AUTOMATIC STARTING DEVICE 4 Sheets-Sheet 3 Original Filed April 15, 1958 Oct. 26, 1943. 1. E. COFFEY I AUTOMATIC STARTING DEVICE Original Filed April 15, 1938 4 Sheets-Sheet 4 fmlenl'or w v m 5% N a ieueao sze 1943 I 1 auroMs'r'ios'rnn'rmo nEvIoE Irven EL Coffey, Normandy, Mo., assignor to -George R. Ericson, Kirkwood, M0., as trustee "Original No. 2.174313, dated Septembe'rZG, 1939, Serial No. 202,144, April 15, 1933. Application for reissue February 4, 1943, Serial No. 474,739

39 Claims (01.

mechanism embodying a suction control adapted This invention relates primarily to starting devices for internal combustion engines and consists particularly in novel control mechanism for actuating the engine'starter motor responsive to conditioning of the engine for starting ancl'for discontinuing the operation of "the starting motor when the engine begins to run under its own power. I

Certain features ofzthe invention, and particularly the control mechanism, may be used for controlling other'functions of the engine, and the use of the various features of the invention for any purpose is intendedto be covered by the claims. r

Automotive starting devices now inuse are provided with positive manual, electrical, and suction controls arranged so that the engine will start automatically when the throttle valve is opened to the extent which is desirable for starting, provided the generator voltage is insuflicient to overcome the battery voltage and there is substantially no suction in the engine intake manistarting ofthe engine.

fold. With such arrangements, injury to the diaphragm or other part of the suction mechanism may cause cuttlngin'of the starter motor, if the engine speed is reduced sufliciently to permit the generator potential to fall below that of the battery, as'frequently occurs, with consequent danger of wrecking the starting mechanism and other associated parts of the engine.

Another disadvantage of such devices results from the fact: that the cranking suction-in the engine intake passages, particularly, where a thermostatically controlled choke is used, frequently approaches or exceeds the suction existent in these passages when the engine is operatingeunder a heavy' load with throttle wide open. If the suction device is arranged to insure an open condition ofthe starter circuit under the latter conditions, it may also prevent operation or, at least, continuous operation of the starter motor during cold starting, when the choke valve is held relatively tightly closed and when the engine frequently fires several times before running regularly. In the latter'case, the starter motor may cut in and out intermittently, clashing the pinion and fly wheelgears and preventing An object oi? the present invention is to provide engine. starting device having suction control mechanism functioning. to'preventcutting in of the. starter whilesuction exists in the engine intake, but. being inefiective to breakthe startercontrol circuit.

Another object is to provide engine control to insure the circuit remaining open at substantially lower suctions than has heretofore been possible.

Another object is to provide engine control mechanism having throttle andsuction controlfeatures formed compactly"and rigidly upon the carburetor so as to minimize the likelihood of the mechanism getting out of adjustment.

Another object of the invention is to provide a control device having suction control mechanism capable of functioning to prevent operation of the control-while a predetermined suction exists in the engine intake passage.

Another object is to provide engine control mechanism including manual and suction controls, the suction control device being more durable than similardevices heretofore in use so as to minimize the possibility of actuation of the control whilethe engine is running even though some other' element of the mechanism may not be in proper condition.

The above objects hereafter appearing are attained substantially by the structures and mechanisms illustrated in the accompanying drawings in which: 1 r

Figs. 1,9 and 10 are diagrams representing various parts of internal combustion engines with connecting wiring. I Fig. 2 is a side view showing the carburetor in Fig. 1 substantially enlarged, a portion being broken away and sectioned for clearer illustration.

Fig. 3 is a detail sectional view taken substantially on line 33 of Fig. 2.

Figs. 4, 6 and! are views similar to Fig. 3 but showing the parts in diflerent positions.

Fig. 5 is an enlarged detail view of parts of the structure shown in Fig. 4. l 1

Fig. 8 is-a, sectional detail View taken substantially on line 8--8 of Fig. 7. 1

Fig. 11 is a side view, partly broken away and sectioned, showing another part .of the mechanism in Fig. 1. r

. Figs. 12 and ,:13 are enlarged sectional views, the. parts being shown in different positions, illustrating a portion of the mechanism shown inFig.10. v

Fig. 14 is a horizontal section taken substantially on the corresponding section line of Fig.

.13, and

ture thereto. Also associated with th engine is the usual storage battery 8, distributor I which ordinarily includes the breaker point structure I, and high tension coil 9. Ignition switch II is connected to the battery by means of a lead |il2 ll. The switch is, in turn, connected to the breaker points, coil, and distributor by e through the wall of chamber 53 as shown. Ex-

leads ll-ll and i5l| in a well known manner. The coil is grounded at I! and the breaker I points at IS. A charging lead 2il2l2I-Il 82- connects the generator with the battery, a reverse current relay or cut out, generally indicated at 24, being interposed in this circuit.

Battery 5 is connected to starter motor 3 by mean of a lead |I-l225262'|, the motor being grounded'at 25 and 25 to complete the circuit. interposed in'this circuit is a solenoid control switch 50 having its coil connected at one end to the battery through the ignition switch by means of a lead 52-3344 and connected at its other end to the generator by means of a lead 55-555$2|I. The generator is grounded at-tl and lid. Interposed in this circuit is a semi-automatic switch. device generally indicated at 51 and mounted on the carburetor. This device is shown in detail in Figs. 3-8, inclusive.

Mounted on the end of the starting motor is a motor speed control device 55 (Fig. 11).- Excessive speed of th motor, which may occur with the starter pinion disengaged from the fly wheel, causes balls in to be forced outwardly centrifugall'y which, in turn, moves plungerl l against metalcontact 41. This causes grounding of the connection'between switch olenoid II and bat tery I by' means of a lead-55L and a ground lead 45-. This speed control device, as well as certain other features of the present arrangement, are disclosed and claimed in my Patent No. 2,088,484 issued January 19, 1937.

A resistance 41 is interposed in lead 33-" between the ignition and solenoid switches. This resistance element is in the form of a light bulb of the type adapted to increase its resistance when it has become heated. The hot resistance of the element" is such as to prevent closing of the starter circuit by means of solenoid switch 5|, which prevents inopportune actuation of the starter motor when the engine speed and suction are low. A second; bulb 45, similar to bulb l1, except that it is of a characterto be heated more rapidly, is connected in parallel around switch solenoid II by means of leads 32-35-59 and 85-55-55. Whenresistance is cold,.cur-

mounted therein on a shaft 51. Mounted on the carburetor is the novel starter switch device, generallv indicated at 51. This device includes eases municates with the suction in the mixture conduit posterior to-the, throttle by means of a passage 55 which connects with E passage formed in rib 51 and extending upwardly into the choke controlling thermostat housing 58, as disclosed in my Patent No. 2,085,351.

One end of throttle shaft 52 is cut away to form a semi-circular sector 52a which extends tending outwardly and upwardly from chamber 53 adjacent throttle shaft sector 52a'is a second chamber 59 which slidably receives a, plunger 55 having a dished'inner en'd 6|. Plunger 60 is hollowed as at 62 for telescopingly receiving the cup-shaped end portion 53' of a short shaft 5| (Fig. 5). Cupped portion 53 is constantly urged outwardly by a coiled spring 65 and moveing a shoulder against which is urged a bowshaped metal switch blade 59 ofresilient material, by a coiled spring ill. Spring I0, at its upper end, is seated, in a hollowed portion II formed in cap 12 secured to the upper end of chamber 55 by screws or bolts 13 (Fig. 2)'. Cap l2'is1of suitable insulating material, such as Bakelite or a chamber 53 formed in the carburetor barrel and communicating with atmosphere, at its lower extremity, by means of an opening 55 (see Fig. 2). At its upperextremity, this chamber comhard rubber, and mounts threaded bushings 14 receiving terminal screws I5 under the heads of which are secured terminal clips 16 for attachment of electrical connections as I1 and I8. Screws 15 extend entirely through insulating cap 12 and are disposed to be engaged by switch blade element 59 when the latter is propelled upwardly. Loosely received in chamber 53 is a ball," which, when the carburetor is inactive, and the throttle nearly closed, lodges between the proiecting, dished end of plunger 80 and sector 52a at the end of the throttle shaft, as shown in Fig. 3. Screen 54 prevents-the loss .of ball 19 in case it should slip past the plunger for any reason and restrains the entry of dirt into chamber 55.- A screw 80 prevents rotation of plunger in chamber 59. The switch device operates as follows:

When'the carburetor is inactive andfthrottle 'on the throttle shaft. Rotation fof'the throttle valve in the opening direction the amount'recommended for starting, in the present instanceapproximately 40 from the full closed position (Fig. 4). forces ,ball 1,9, plunger 60, and switch blade 59 upwardly in chamber 58 causing the switch blade to'contact both screws 15 and electrically connect wires I1 and 1am energiai'ng the starting moton'Blade 59. being of resilient material. collapses slightly 'Whenforced against screws l5, as indicated inIFi'g. 5, sass to'provlde a. wiping action for cleaning theyswit'ch blade and terminalscrews. F

' vDuring further I opening. movement of the throttle valve from theposition shownin Fig. 4. spring collapses permitting telescoping of shaft 54 and plunger (Fig. 6). As soon as theorigine commences to run under its own power, and the throttle valve is released to beclosed by the usual closing spring, ball 19 will again be released from its lodgement between plunger 55 and sector 52a and will be picked up immediately due to the suction applied thereto through passage 55. Thereafter, throttle valve 5| maybe freely manipulated, as desired, without affecting the switch .ready for reclosing of the switch. Fig. 3 shows in solid lines the throttle valve opened les than enough for closing the switch and indicates in dot-dash lines the closed position of the valve.

As indicated in the wiring plan, Fig. 1, closing of switch 3I as described, will actuate switch solenoid 30 was to close the starter motor circuit, provided substantially no current is flowing from the generator through circuit -39-3I-33--34 to the battery, this actuation occurring after resistance 40 has become heated, but before resistance 41 becomes fully heated." Closing of the starter motor circuit operates the starter motor to crank the engine, as is well known, and when the engine starts to run'under its own power the starter motor pinion will be automatically disengaged from the fly wheel. The arrangement hown in Fig. l is intended for use with the Bendix type starter drive. The speed control mechanism shown in Fig. 11 provides for immediate stopping of the starter motor when the motor speed becomes excessive due to unmeshed condition of the starting gears.

The size and weight of ball 10 and the dimensions of suction passage 56 in a practical embodiment are such that the ball will be picked up when the suction inpassage 55 corresponds with a manometer reading of approximately /2 inch of mercury, provided the throttle valve is closed or nearly closed, as is shown in Fig. 3. Thereafter, the ball will be maintained in its upper position, positively preventing actuation of the starter switch, until the suction in passage 50 drops to a value of the order of 2 inches of water.

This effectually prevents re-engagement of the starter mechanism at any time when the engine is running under its own power, even under the most adverse suction conditions in the intake manifold, while insuring running of the starter motor until the engine is actually started. Ball 19 cannot be picked up by engine suction if the throttle valve is farther open than i shown in Fig. 3 and the ball is wedgedbetween throttle shaft sector 52a and plunger 60. This prevents cutting out of the starter motor circuit by suction alone until the throttle is returned to closed position, with the advantage that as long as the operator holds the throttle pedal depressed so as to maintain the throttle open, as in Fig. 4, the starter motor cannot cut out until the resistance of the generator circuit is suflicient o open switch solenoid or the motor speed becomes excessive. Fig. 9 shows a circuit plan of an arrangement particularly adapted for use with a direct drive tarter instead of the Bendix type shown previously. Resistances 41 and 03 are omitted and a reverse current relay BI is inserted in the circuit between ignition switch l0, connected to battery.

and solenoid 30 controlling pinion 80 on starter fly-wheel 8B. This movement, in turn, close cir-. cuit I I -I2 25-2'E2T directly from the batill tery to the starter motor, actuating the motor so as to crank the engine. 7

As soon as the generator resistanceovercomes the battery E. M. F. relay 8| will be opened so as to cut oil? battery current tosolenoid 30, and. in turn,

open switch

25, 20 and. stop the starter motor. While the engine is operating, enerator current has a direct path through circuit 20-052 I2223-I2I I to battery for charging purposes. 3

Fig. 10 shows a starter motor circuit II--I2-- 25262'| controlled by a solenoid switch 30, as in Fig.1. Solenoid 30 is controlled by circuit 3l94- -S5969'I90-32 and interposed in this circuit are a manual switch 93, controlled by throttle pedal 09, and a combination solenoidsuction switch device 90, shown in greater detail in Figs. 12, 13, 14 and 15.

Switch device 90 includes a solenoid connected to

terminals

96 and 98, and a core armature IOI carrying a switch bar disc I02 disposed, when the solenoid is energized, to connect

terminals

96 and 91 in the control circuit for solenoid 30.

Device has a casing SI and at its lower end has a. threaded boss 02 for attachment to the engine intake manifold and through which extends suction passage I04. Depending from core MI is a finger I05 with its lower end slidably received in passage I04 for guiding purposes. A washer lflfisecured to finger I05 seats a coiled spring I01 which, at its upper end, bears against a grooved annulus I08 of insulating material for yielding support of the switch bar disc. Core IOI' is constantly urged downwardly by coiled spring I09 seating against a second washer IIO secured to finger I05.

A diagonal passage III connects passage I01 with chamber H2 below disc I02. Chamber II3 above the disc communicates with atmosphere through a series of holes I I4 in casing 9 I Chamber, H3 additionally communicates with atmosphere through port I20 and around loose fitting core I0]. 4

Disc I02, in its lowermost position, seats against an annulus I2I of gasket material. Thus, when solenoid 99 is unenergized, disc' I02 is urged' broken when throttle pedal 89 is released to permit closing of the throttle valve, or the generator resistance becomes great enough to prevent actuation of solenoid 30 by the battery current.

A resistance element I22'is connected in parallel with circuit '950E98I00 between the ignition switch and the'generator and thence to ground. This element, when heated, substantially increasesits resistance so as to force willcient current to pass through solenoid 99 to energize the same. Also connected in this circuit, in series'between the ignition switch and the generator, is'a second resistance l'l similarly adapted to increase its resistance when heated. Resistance W2 corresponds with element 48 in Fig. 1 and prevents too rapid cuttingin of the starter motor after starting. Resistance 41 prevents cutting in of the starter during gradual decreasing 01' the engine speed, in which case this resistance becomes not before suiiicient battery current flows through coil 30 to close

switch contacts

28 and 26. This circuit plan arrangement is also shown in my Patent No. 2,068,484 with the exception of certain features of the solenoid-suction switch device 90. I

In order to operate the starter mechanism shown in-Fig. 10, the operator moves ignition switch Ilia to the left, so as to connect terminal 34 with the battery through circuit ll-iIt-Ill2 l l, and then depresses throttle pedal II which closes switch 93 and picks up switch bar disc I02, thus completing a circuit between the battery and switch solenoid It so as to close the motor-battery circuit switch 25, 2B, and energize the starter motor. operate under its own power. the generator resistance and resistance ll cooperate to'cut out the solenoid switch 30, or this switch may be cut out by releasing of the throttle pedal 89. .Suction cannot break the circuit controlling solenoid ill because of the substantial atmospheric bleed provided around disc I02 within solenoid casing I05, as indicated in Fig. 14. Howevenwhen solenoid 99 is unenergized, dropping disc I02, this air bleed is sealed so that thereafter suction in passage IM substantially resists any tendency to lift disc I02 so as to re-connect

terminals

96 and 91.

In this form is also shown means for actuating the starting motor in case the automatic mechanism should become inoperative or damaged for any reason. This means includes switch terminals I26 and I2! which are connected by movement of ignition switch Illa to the right instead of to the left, as previously, this having the eifiect of energizing the ignition circuit without ail'ecting the starter circuit. Thereaftenibutton III may be depressed for conducting battery current through the solenoid by means of circuit il--l2- In each of the forms there is shown a device which insures automatic actuation of the starter motor for cranking the engine whenever a manual control such as the throttle pedal is actuated,

there is substantially no suction in the engine intake passages, and there is suillcient battery E. M. F. flowing'through solenoid III to close switch 25-26. Also in each case, the automatic starter circuit is broken immediately when the generator resistance becomes sufllcient to prevent actuation of the starter motor solenoid by the battery current, or in case of movement 01' the manual device, such as, the throttle pedal, to the original or rest position. However, in no case can the suction in the engine, which increases sharply when the engine starts to run after being cranked,

when the engine starts to souroe,.switch means in said circuit, a manual control for said switch means, and additional control means for said circuit arranged to respond to a predetermined suction in the induction conduit of an associated engine for rendering said manual control ineilective, said suction control being unresponsive to said predetermined suction when said switch is closed by coordinaable with said throttle valve and said suction con- 'trol means being responsive to said predetermined suction for rendering said manual control means inoperative only when said switch is open.

3. In starting mechanism for internal combustion engines, a starter motor and battery circuit, a manual control in said circuit, and an additional circuit control responsive to suction in the intake conduit of an associated engine only when said circuit is openfor rendering said manual control inoperative.

4. In mechanism 01 the class described a chamber arranged for communication with an internal. combusion engine intake conduit, an engine starter switch having an actuator member extending into said chamber, means normally urging said switch open, a manually controlled member in said chamber, and a loaded element having a rest position forming an operative connection between said members whereby said switch will be closed against said means when said manual member is moved to predetermined positions, said element being movable by suction only when said'manual member is in other than said position, to render said connection inoperative.

5. Mechanism as specified in claim 4 in whichsaid loaded element is responsive to suction to prevent closing of said switch and is unresponsive function to break the starter circuit. This suction is only effective to prevent re-energization of the-starter circuit after it is once broken. The

arrangements shown and described, accordingly,

are very effective to insure proper starting of the engine under all conditions and to prevent cutting in of the starter at any time when the engine is operating under its own power.

Various features 01 the circuit arrangements and structures shown are not essential and these may be modified in various respects as will occur to those skilled in the art. The exclusive use of "all such modifications as come within the scope tion engines, a' starter motor, a source of electrical energy, a connecting circuit for said motor and to suction when said switch is closed.

6. In starting mechanism tor internal combustion engines, a battery, a starter motor and a generator electrically coupled with said battery, a starter switch between said battery and said starter, a chamber arranged to be exposed to suction in the induction conduit of an associated internal combustion engine, an element in said .chamber constantly urged toward a rest position, and a manual control for said switch, said switch being closed only when said element is in said rest position and said manual control is in predetermined positions, said element being responsive to suction only when said manual control is Q in other than said positions for rendering said control inoperative. I

7. In mechanism for starting internal combustion engines, an induction conduit part for the engine, a throttle ,valve carried by said part, an engine starter switch, and operative connecting means between said valve and said switch com prising an actuator for said switch, a member adjacent said actuator and movable with said throttle valve, and an element normally urged toward an operative position for rendering said throttle member operative to close said switch, said element being responsive to suction in the engine induction conduit for rendering said manual control inoperative when said switch is open and being unresponsive to suction when said switch is closed.

a. Mechanism as specified in claim '1 in which erative position under the influence or varying pressure conditions only when said switch is open.

9. Mechanism as specified in claim 7 in which,

conduit and a throttle valve, a .chamber com-. municating with suction in said conduit, a starter switch having an actuator in the wall of said chamber, a member in. the chamber wall adjacent said actuator and movable with said throttle valve, and an element in said chamber normally urged toward a rest position adjacent said actuator and said member for rendering said member operative to close said switch when said throttle valve is opened, said element being responsive to suction only when said switch, is open for rendering said member inoperative as a switch control.

11. Mechanism as specified in claimlO, in which said member is arranged for communication with the engine intake suction on one side of said suction responsive element and with at,- mosphere on the opposite side of said element.

12. In a carburetor, a mixture conduit having a throttle valve, a chamber communicating with said conduit, a member in the wall of said cham-- ber movable with said throttle valve, an engine starter switch carried by the carburetor and having an actuator in the chamber wall, and a loose element in said chamber normally urged toward at position to complete an operative connection whereby said switch is closed when said throttle valve is substantially opened, said. element being movable by suction away from said position only when said switch is open.

13. Mechanism as specified in claim 12 in' which said throttle valve is mounted on a shaft with a part extending through the wall of said chamber and constituting the switch control member adjacentsaid actuator.

14. In starting mechanism for internal combustion engines, a starter motor and battery circuit, a manual control for said circuit, an additional circuit control responsive to engine suction only when said circuit is open for rendering said manual control inoperative, and a generator, and an electromagnetic coil in said circuit, said coil having an armature connected to said additional circuit control and normally urged toward a position to open said circuit, said battery being arranged to energize said coil to close said circuit when said generator is substantially inop erative.

15. In combination; an engine control member, a normally open starting circuit including a starting motor and a source of electrical energy, a switch for closing the starting circuit, an element cooperating with said switch shiftable by intake suction andmovable to two predetermined positions, said engine control member being operable to close the starting circuit when said suction shiitable member'is in one predetermined position and said' suction shiftable member being movable by suction to its second position only when said engine control member is in a predetermined position. v

16. In starting mechanism for internal combastion engines-a control memberfor said engine, a starter motor, a source of electrical energy, a connecting circuit for said motor and source, a normally open switch mechanism in said circuit,

intake suction movable means cooperating with and forming a portion of said switch mechanism, said suction movable means having at least two predetermined positions, said switch being closed by movement of said control member when said suction movable means is in one position, and said suction movable member being movable by suction to said second position only when said control member is moved from switch closing position.

17. In starting mechanism for internal combustion engines, a startermotor and battery circuit, a control for said circuit including a manual control and a relay operable thereby to control the starting circuit, a generator driven by said engine, said relay being grounded directly'through said generator whereby the blocking action of the generator voltage will cause said relay to break the starting motor circuit when the engine starts to run under its own power, a suction controlled member having a first position and a second position, said manual control being effective to cause operation of said relay only when said suction operated member is in said first position, and said manual control being so constructed and arranged as to be ineffective to operate said relay when said suction control member is in its second position, said suction control member being movable to said second position only when said manual control is in a predetermined position.

18. Mechanism as specified in claim 1'7 in which said manual control has means to interfere with the movement of said suction control member to said second position.

19. Mechanismas specified in claim 17 in which said suction control member is movable bysuc tion to said second position only when said starti ing motor circuit is open.

20. Mechanism as specified in claim 17 in which said suction control member is movable to said second position only when said manual control is in a predetermined position.

21. In a device of the class described, a body structure having a main passageway therethrough, a throttle in said main passageway, a throttle shaft journalled in said body structure, a switch carried by\said body structure and an eccentric on said throttle shaft, a second passageway formed in said body structure, said second passageway having an outlet in said main passageway; and a movable member constructed and arranged to make or break an operating connection between said switch and said eccentric, said movable member having a part locatedv in said last-named passageway and being influenced under certain conditions by the suction therein.

22; In a device of the class described, a body structure having a throttle bore therein, a throttle valve mounted in' said bore, a shaft for said throttle valve having an eccentric thereon, a switch contact member carried by said body structure and a suction operable member operably associated with said device and having at least two operating positions, said eccentric being constructed and. arranged to transmit operating force from said shaft to said switch contact member when said shaft is operated with said suction operated member in one of said operating positions, but being incapable of transmitting such force when said suctionoperated member is in the other position.

23. in a device of the class described, a mixing conduiha throttle for said mixing conduit, a shaft for said throttle,-an operating member operateclby'said shaft, a switch carried by said member, an operating connection between'said operating member and said movable member, and a suction operated member forming a link in said operating connection, said suction operated member being movable to operative or inopera-, tive position in response to suction conditions.

24. In a device of the class described, a carburetor having a mixing conduit, a switch member mounted on said carburetor, a throttle for controlling the flow of mixture through said conduit, a shaft for said throttle, a suction controlled operating connection between said throttle shaft and said switch, said suction controlled connection comprising a member having-a position in which it is capable oi transmitting force from said throttle shaft to operate said switch and another position in which it is inoperative, said switch comprising a plunger and a contact member connected to said plunger by a yieldable spring, said switch being actuated under certain conditions at a predetermined point in the open ing movement of said throttle, said throttle being movable to fully open position after actuation of said switch by'compression of said spring.

25. In a device 01 the class described, a throttle valve, a switch having a movable member adapted to be controlled thereby. a throttle operating member, an operating connection between said throttle operating member and switch including a motion transmitting member movable into or out of effective position for transmitting motion from said throttle operating member to said movable switch member, said switch being operated by a partial opening movement 01' said throttle, a spring resisting .iurther opening movement of said throttle after said switch is operated, said spring being sufllciently yieldable to permit the full opening movement of the throttle by the' application of additional force thereto.

26. In a device of the class described, a throttle valve, a throttle lever, a switch controlled thereby, means forming an operating connection between said lever and said switch, said switch being operated by a partial opening movement of said throttle, a spring for resisting complete opening movement of said throttle, said spring being sufficiently yieldable to permit the full opening movement or the throttle by the application oi additional force thereto, and suction operated means for preventing the operating of said switch by opening of said throttle under certain conditions.

27. In a device of the class described, a throttle valve, 9. throttle lever, a switch controlled thereby, means forming an operating connection between said lever and said switch, said .switch be ing operated by a partial opening movement of said throttle, a spring resisting complete opening movement oi said throttle, said spring being suificiently yieldable to permit the full opening interference by said yieldable means.

30. In an internal combustion engine, a car- 22.385 mixing conduit, said switch having a movable throttle, yieldable means for resisting a full movement of said throttle when said switch is actuated thereby, and means for interfering with the operation of said switch device by said throttle, said,interfering means being operable to permit the full movement .of said throttle without interference by said yieldable means.

29. In an internal combustion engine, a throttle valve, acontrol device, a switch for controlling the operation of said control device,,

means for closing said switch by a partial opening movement of the throttle when the engine is at rest, yieldable means for resisting the full opening movement of said throttle and means operable after said engine has been started to permit the full opening of said throttle without buretor having a throttle valve, a control switch, means operable by said throttle valve for actuating said control switch by a partial movement in opening direction of the throttle when the engine is at rest, means yieldably resisting a lull opening movement oi the throttle under certain condiing direction oi said throttle without interference by said yieldable means.

31. In a device of the class described, a carburetor having a throttle valve, a control switch, means operable by partial opening movement of said throttle valve for operating said switch when the engine is at rest, yieldable means for resisting a full opening movement of said throttle valve, said resistance coming into operation only after the operation of said switch and means including a suction operated device for permitting the full opening movement of said throttle without resistance by said yieldable means under oertain conditions. 32. In a device of the class described, a carburetor, a throttle valve therefor, a control switch, means operable by a partial opening of movement or thethrottle by the application or additional iorce thereto, suctionoperated means for preventing the operation or said switch by opening 01' said throttle under certain conditions, said throttle being free to open without being afiected by the resistance oi said spring when said suction-operated means is in position to prevent the operation'oi said switch by the opening of said throttle.

said throttle valve when the engine is at restfor closing said control switch, yieldable means for resisting the full opening movement of said throttle valve under certain conditions, and means including 'a suction responsive device for permitting the full opening of said throttle, valve under certain conditions without interference by the resistance of said yieldable means.

33. A carburetor body member having a carburetor induction passage therethrough, a throttle valve mounted in said passage, a throttle shaft mounted in said member transversely with respect to said passage, said throttle shaft hav-- ing an eccentric surface thereon, a switch member mounted in said body member, and a motion transmitting member movable into or out of effective position for transmitting'motion from said eccentric to said switch member.

34. In a device of the class described, a carburetor body structure having a main passageway therethrough, a throttle in said main pas- 5 sageway, a throttle shaft carrying said throttle and journalled in said body structure, a control switch member carried by said body structure, an eccentric on said throttle shaft, a suction operated member having an operating position in which it forms an operating connection between said eccentric and said switch member and another position in which it does not form such a connection, said member being shii'table by suction from one oi said positions to the other. 35. A circuit controlling mechanism including being movable a manually operated shaft, a contact member, a suction operable member, means controlled by said shaft for closing a circuit through said contact member when said suction operated member is in a predetermined position, said means being inoperative to close said circuit when said suction operated member is in another position, and means preventing the shifting of the posi-- tion of said suction operable member by suction when said shaft is in a predetermined position.

36. In an internal combustion engine, a carburetor having a throttle, manual means for operating said throttle, a control switch operable by said manual means, suction controlled means capable of forming a part of the force transmitting connection between said manual means and said control switch, said suction controlled means by suction to a position in which it does not form such part of such force transmitting connection, and means controlled by said manual means for preventing the movement or said suction controlled means to such position.

3'1. In an internal combustion engine, a carburetor having a throttle, manual means for operating said throttle, a control switch operable by said manual means, suction controlled means capable of forming a part of the force transmitting connection betweensaid manual means and said control switch,said suction controlled means being movable by suction to a position in which it does not form such part oi such force transmitting connection,

means controlled by said manual means for preventing the movement or said suction controlled means to such position, and yieldable means for limiting the amount of force transmitted from said manual means to said switch.

38. In a device or the class described, a carburetor having a throttle, manual means for operating said throttle, a shiftable contactmember, a suction operable member for transmitting force from said manual member to shift said contact member, and yieldable means for limiting the amount of pressure applied to said contact member by said manual member, said yieldable means having sufllcient strength to prevent the operation by suction 01' said suction operable member when said manual means is in a predetermined position.

39. In a device of the class described, a carburetor having a throttle, manual means for operating said throttle, a shiitable contact member, suction operated means associated with the manual member and being so constructed and arranged that its movement to a predetermined position will permit movement of the contact member by said manual member, and a yieldable means for limiting the amount of pressure applied to said contact member by said manual member, said yieldable means having sufflcient strength to prevent the operation by suction of said suction operable member when said manual means is in a predetermined position.

IRVEN E. COFFEY.