Combined carburetor throttle and choke control for small gasoline engines

Claim 2

An internal combustion engine control device of the type that comprises a lever manually swingable about a fixed axis through and beyond a range of increasing running speed positions to a defined ''''choke'''' position, and means providing a connection between said lever and the throttle actuator of the engine through which adjustment of the lever in its range of running positions effects adjustment of the throttle actuator, said control device being characterized by the last mentioned means comprising: A. a second lever pivoted to swing about a second fixed axis which is spaced from and parallel to the first mentioned axis, said second lever having 1. an arm connected with the throttle actuator and 2. a cam follower spaced from said second axis; B. fixed abutment means engageable by said second lever to define one limit of swinging motion thereof at which the engine is caused to run at its maximum speed; and C. cam means on the first mentioned lever cooperable with said cam follower to swing the second lever towards engagement with the fixed abutment means in consequence of movement of the first lever towards its ''''choke'''' position, said cam means having a portion which is of uniform radius about the first axis and which thus permits the first lever to be swung a limited distance to and from its ''''choke'''' position independently of the second lever while the later remains engaged with said abutment means.

Claim 3

a cam follower spaced from said second axis; B. fixed abutment means engageable by said second lever to define one limit of swinging motion thereof at which the engine is caused to run at its maximum speed; and C. cam means on the first mentioned lever cooperable with said cam follower to swing the second lever towards engagement with the fixed abutment means in consequence of movement of the first lever towards its ''''choke'''' position, said cam means having a portion which is of uniform radius about the first axis and which thus permits the first lever to be swung a limited distance to and from its ''''choke'''' position independently of the second lever while the later remains engaged with said abutment means.

Claim 4

a cam follower spaced from said second axis; B. fixed abutment means engageable by said second lever to define one limit of swinging motion thereof at which the engine is caused to run at its maximum speed; and C. cam means on the first mentioned lever cooperable with said cam follower to swing the second lever towards engagement with the fixed abutment means in consequence of movement of the first lever towards its ''''choke'''' position, said cam means having a portion which is of uniform radius about the first axis and which thus permits the first lever to be swung a limited distance to and from its ''''choke'''' position independently of the second lever while the later remains engaged with said abutment means.

Claim 5

A manually actuatable control device for an internal combustion engine that has a choke valve which is biased to an open position and which has a laterally projecting actuating arm on its shaft, a throttle actuator comprisiNg a movable governor member, and a spring connected at one end with said governor member to impose upon the latter a biasing force that can be varied to afford control of engine running speed, said control device comprising: A. a first lever to which the other end of said spring is connected and which is mounted to swing about a first fixed axis to and from a defined limit which corresponds to maximum engine running speed; B. a second lever mounted in partially overlying relation to the first lever for swinging motion about a second fixed axis spaced from and parallel to the first axis and having an abutment which collides with said actuating arm and swings it to a choke closing position in a final stage of motion of the second lever in one direction toward a defined limit; C. a projection on one of said levers providing a cam follower slidingly engageable with edge portions of the other lever; and D. cam means on said other lever comprising edge portions thereof which cooperate with said projection to constrain the two levers to move substantially in unison toward and from said limit of swinging motion of the first lever but which permit the second lever to move through said final stage of its motion, to and from its said choke closing position, independently of the first lever while the latter remains at its said limit of motion.

Claim 6

A manually actuatable control device for an internal combustion engine that has a choke valve which is biased to an open position and which has a laterally projecting actuating arm on its shaft, a throttle actuator comprisiNg a movable governor member, and a spring connected at one end with said governor member to impose upon the latter a biasing force that can be varied to afford control of engine running speed, said control device comprising: A. a first lever to which the other end of said spring is connected and which is mounted to swing about a first fixed axis to and from a defined limit which corresponds to maximum engine running speed; B. a second lever mounted in partially overlying relation to the first lever for swinging motion about a second fixed axis spaced from and parallel to the first axis and having an abutment which collides with said actuating arm and swings it to a choke closing position in a final stage of motion of the second lever in one direction toward a defined limit; C. a projection on one of said levers providing a cam follower slidingly engageable with edge portions of the other lever; and D. cam means on said other lever comprising edge portions thereof which cooperate with said projection to constrain the two levers to move substantially in unison toward and from said limit of swinging motion of the first lever but which permit the second lever to move through said final stage of its motion, to and from its said choke closing position, independently of the first lever while the latter remains at its said limit of motion.

Claim 7

A manually actuatable control device for an internal combustion engine that has a choke valve which is biased to an open position and which has a laterally projecting actuating arm on its shaft, a throttle actuator comprising a movable governor member, and a spring connected at one end with the governor member to impose upon the latter a biasing force that can be varied to afford control of engine running speed, said control device comprising: A. a first member having a connection with the other end of said spring and which is constrained to movement in opposite directions toward and from a defined limit which provides for maximum engine running speed; B. a second member constrained to move in opposite directions to and from a defined limit and arranged to be manually actuated, said second member having an abutment which collides with said actuating arm and swings the choke closed in a final portion of motion of said second member to its said limit; and C. cooperating means on said members providing a motion transmitting connection between them whereby in all other portions of the motion of the second member the first member is constrained to move substantially in unison therewith but whereby said second member can move independently of the first member through its said final portion of movement while the first member remains at its maximum speed limit of motion.

Claim 8

A manually actuatable control device for an internal combustion engine that has a choke valve which is biased to an open position and which has a laterally projecting actuating arm on its shaft, a throttle actuator comprising a movable governor member, and a spring connected at one end with the governor member to impose upon the latter a biasing force that can be varied to afford control of engine running speed, said control device comprising: A. a first member having a connection with the other end of said spring and which is constrained to movement in opposite directions toward and from a defined limit which provides for maximum engine running speed; B. a second member constrained to move in opposite directions to and from a defined limit and arranged to be manually actuated, said second member having an abutment which collides with said actuating arm and swings the choke closed in a final portion of motion of said second member to its said limit; and C. cooperating means on said members providing a motion transmitting connection between them whereby in all other portions of the motion of the second member the first member is constrained to move substantially in unison therewith but whereby said second member can move independently of the first member through its said final portion of movement while the first member remains at its maximum speed limit of motion.