Abstract: This multiplier includes a first link unit in a force transferring relationship with one of an actuator and a device to be actuated. A second link unit is pivotably connected to the first link unit in a force transferring relationship with the other of the actuator and the device to be actuated. At least one spring in a force transferring relationship with at least one of the first and second link units is provided. The first and second link units are disposed between the actuator and the device to be actuated with the first and second link units in cooperation with each other and the spring providing a relatively linearly increasing multiplied output force to the device to be actuated when the actuator is actuated.

Abstract: A power-driven quarter-turn valve actuator includes a reciprocating drive member in the form of a rod mounted perpendicularly to and spaced a preselected distance from a valve stem. A crank arm is coupled to the valve stem so that the axis of the crank arm makes an angle of between approximately 60.degree. and 100.degree. with a line intersecting the stem axis and perpendicular to the rod axis when the valve is shut and makes an angle of between minus 30.degree. and plus 10.degree. with said line when the valve is fully open. A link member connects the outer end of the crank arm to a point on the reciprocating rod. The preselected distance between actuator rod and valve stem, and the lengths of the crank arm and link, are chosen to produce a variable actuator torque output curve that closely matches the operating torque requirements of the valve.

Abstract: Disclosed herein is an engine throttle control for marine propulsion devices and the like, which control includes a main control lever mounted for movement between a neutral or idle position and a full throttle position, a throttle lever adapted to actuate the engine throttle in response to rotational movement of the throttle lever, an actuation member operably connected to the control lever and mounted for movement in response to movement of the control lever, and means connecting the throttle lever to the actuation member for rotating the throttle lever in response to the movement of the actuation member and for effecting gradually increasing rotational movement of the throttle lever relative to incremental movement of the actuation member during at least a portion of control lever movement from the idle position toward the full throttle position.

Abstract: The invention comprises an actuating lever assembly for the actuation of an adjustable member in a mechanical assembly, in particular, an adjustable member in a heating and ventilating assembly in a motor vehicle the lever assembly comprising: a support frame including a support surface and a guide means arranged substantially parallel to, and spaced apart from, said support surface; a movable actuating lever supported in said frame, one end of said actuating lever having a curved shape engageable with said support surface in such a manner that said actuating lever is both supported by, and can roll relative to, said support surface, between predetermined limits, on the application of force to the other end of said lever; guide means on said lever adjacent the center of curvature of said curved end and slidably engageable with said guide means on said support frame; and a connection point on said lever for the attachment thereto of a mechanical linkage between said adjustable member and said lever, which conn

Abstract: The invention provides a brake operating device wherein an operating lever pivoted on a frame transmits an applied force with a variable ratio through a roller and cam-lever mechanism to the brake linkage. A two-armed cam lever is pivoted on the frame and has one arm connected to the brake linkage and on its other arm there is provided a cam track upon which is guided a roller rotatably mounted on the operating lever. There is a recess in the cam lever in the vicinity of its pivot mount and this recess has an approximately semi-circular configuration to receive the roller when the operating lever is in its release position. The cam track on the cam lever is disposed between the pivot mount of the operating lever and the pivot mount of the roller on the operating lever.

Abstract: An actuating mechanism for selectively actuating the control valve of a transmission or the like comprises a rotary input shaft connected to a pair of links at a lost-motion connection. Opposite ends of the links are pivotally connected to a crank assembly pivotally mounted on a rotary input shaft connected to the control valve. A torsion spring is interconnected between the rotary output shaft, the crank assembly and one of the links to selectively rotate the rotary output shaft in opposite directions in response to rotation of the rotary input shaft in opposite directions.

Abstract: A rocker shaft is rotatably mounted and integral with a control valve of a hydrostatic transmission. The valve shaft may be rotated in an arc to either side of a neutral position. A housing is mounted to the control valve with rocker shaft projecting into the housing. A pair of levers are pivotally mounted on the rocker shaft in scissored relationship thereon and an actuating arm is rotatably mounted on the housing to engage camming surfaces defined on first ends of the levers. A drive member or dog is secured to the rocker shaft to engage between second ends of the levers whereby pivotal movments of the actuating arm will transmit pivotal movements of the levers to the rocker shaft to control mechanisms of the control valve. The second ends of the levers are biased towards each other into engagement with the drive member by a coil spring and a stop lug is secured on each of the levers to engage and pivot the other one of the levers in response to pivotal movements of the actuating arm.

Abstract: An output shaft is rotatably mounted on a stationary support to selectively actuate a control valve of a hydrostatic transmission. A pair of levers are pivotally mounted on the output shaft in scissored relationship thereon and an actuating arm is rotatably mounted on the support to engage camming surfaces defined on first ends of the levers. A drive pin is secured to the output shaft to have opposite ends thereof engage bearing surfaces defined on second ends of the levers whereby swinging movements of the actuating arm in opposite directions will alternately transmit pivotal movements of the levers to the output shaft to control actuation of the control valve. The second ends of the levers are biased away from each other by a coil spring to normally engage the bearing surfaces with the drive pin.

Abstract: A brake pedal lever assembly having a cam surface engaged by a cam follower on one end of a master cylinder push rod and so arranged that as the brake pedal lever is moved in the brake actuating direction a cam also on the pedal lever moves the push rod cam follower upwardly toward the brake pedal lever pivot point, increasing the brake pedal lever ratio. A modification has a jointed pedal lever which yieldably resists bending movement. When the bending movement does occur, the cam moves the push rod cam follower at a faster rate, increasing the pedal ratio at a faster rate.

Abstract: A control lever assembly for controlled reciprocation of an operating member which may be a Bowden cable for regulating the flow rate of a pump supplying a hydraulic motor in a hydrostatic transmission. In addition to the usual pivotally mounted control lever, an intermediate lever is pivotally connected between the control lever and the operating member. The intermediate lever is received in a sleeve member which is pivotally mounted about a fixed axis spaced from the fixed axis about which the control lever pivots. The sensitivity of the control lever assembly is thus made smoother and more gradual proximate to the neutral or dead center position of the assembly.

Abstract: A foot pedal assembly with a return spring and having a lever to which the spring is connected and which has a link connected thereto and connected to the foot pedal arm, whereby lesser foot force is required in proportion to the depressing of the pedal itself. The foot pedal is arranged for operating a hydraulic brake of a vehicle.

Abstract: The present invention relates to a pedal command device with variable reduction for a master-cylinder type pressure emitter. The device includes a pedal articulated on a lever that is pivotally movable about a shaft and recalled by a spring. The pedal includes at one of its ends a cam that actuates a pusher articulated on the lever, which pusher commands a pressure emitter such as a vehicle brake master cylinder by means of a thrust member and a rod.

Abstract: A motorcycle brake assembly includes a mount attachable to the motorcycle frame; a braking cylinder on the mount and having a plunger; a plunger actuating lever pivotally supported on the mount; and a crank pivotally supported on the mount and having arms respectively operatively connected with the lever and with a brake pedal in such manner that the mechanical advantage of force transmission is increased as the crank is rotated by the brake pedal.

Abstract: A control lever mechanism which operates to provide a different mechanical advantage at different points in the range of movement of a main operating control member and in dependence on the force applied to, and the force of resistance to the movement of, the main control member is disclosed. The main control lever is pivoted to a fixed fulcrum and linked to a force transmission member by a second pivot forming a fulcrum which is movable along an arcuate path closer to or further away from the fixed fulcrum. When both the fixed fulcrum and the movable fulcrum lie on the same side of the line of action of the force transmission member a component of the applied force tends to move the movable fulcrum towards the fixed fulcrum to increase the mechanical advantage of the control lever.

Abstract: An abutment assembly for an internal shoe drum brake, particularly a vehicle wheel brake, comprising a pair of opposed abutment members for engagement with respective ends of the brake shoes and an arrangement for transmitting only part of the input force applied to one abutment member, to the other abutment member. The arrangement comprises a plurality of individual force-transmitting members each pivotally supported between and engaging the said one abutment member and an output member coupled to the other abutment member.

Abstract: In a mechanical actuator system a primary lever is angularly movable about a first pivot on a secondary lever through a first range to apply a force to an actuated member, and the actuating force is then transmitted to the actuated member through a higher leverage by the secondary lever which is angularly movable about a second pivot on a fixed part. The secondary lever is coupled to the actuated member by a one-way clutch, and the first pivot comprises a connection for a pawl which is engagable with ratchet teeth on the fixed part, at least when the clutch is engaged.

Abstract: According to the present disclosure a variable ratio parking brake control has a foot operated lever with a cam slot. A guide member is pivotally connected to the lever and it also has a cam slot. A clevis that is connected to a parking brake cable has a bearing pin which is slidably supported within the cam slots of the lever and the guide member. A spring is supported by the guide member and exerts a spring force urging the clevis to the outer ends of the two cam slots. The clevis is slidable from the outer ends of the cam slots to the inner ends of the slots in response to both displacement of the lever from a brake released position to a brake applied position and a load on the clevis that exceeds an amount determined by the force of the spring. The displacement of the clevis from the outer end of the cam slot of the lever to the inner end of the slot increases the mechanical advantage ratio of the brake control system.

Abstract: An operating lever system for the brake system of a vehicle has a rod to actuate the brake system and the rod is connected to a pivotally mounted intermediate lever. A pivotally mounted actuating lever has a roller thereon engagable with the intermediate lever. A further roller is resiliently urged against a cam surface on the intermediate lever which guides this roller substantially concentrically of the pivot mount of the intermediate lever during actuation of the rod in the braking direction and at a decreasing distance from the pivot mount upon further moving of the rod in the braking direction.