Bell-crank lever trigger switch with trigger depression adjustment means

Claim 2

An electric switch for portable electric motor-driven tools comprising, a switch casing having an extended frame portion formed integral with the casing, a trigger actuated switch device including speed control means disposed in the casing, a contact carrier disposed in said casing for reciprocation therein along the longitudinal axis of the carrier, said contact carrier containing at least a portion of the switch device wHereby reciprocation of the contact carrier actuates the e switch device and speed control means therein, a bell-crank trigger pivotally mounted at its apex on the free outer end of the frame portion for rotation in the longitudinal vertical plane of the carrier, elongated connecting means secured at one end to the contact carrier and pivotally connected at its other end to one end of the bell-crank trigger, bias means disposed between the frame portion and the outer end portion of the bell-crank trigger to bias the switch device to a first preselected position whereby displacement of the outer end portion of the trigger against the action of the bias means displaces the contact carrier to a second preselected position, and manually adjustable elongatable means connected to said bell-crank trigger between the outer end portion of the bell-crank trigger and the adjacent frame portion for pivotal movement with said bell-crank trigger and engageable with said adjacent frame portion upon pivotal movement of the bell-crank trigger toward the adjacent frame portion to selectively adjust the distance between such outer end portion and the adjacent frame portion when the trigger is fully displaced thereby selectively controlling the associated speed control device.

Claim 3

The structure of claim 1 wherein said adjustably elongatable means includes an elongated yoke lever pivoted at one end to the extended frame portion adjacent its outer end for rotation in the longitudinal plane of the extended frame portion, whereby the outer end portion of the lever abuts the extended frame portion in one rotative position of the lever, and a bolt rotatably secured at its one end to the outer end portion of the trigger, the other end of the bolt being threadedly secured to the outer end portion of the lever, whereby circumferential rotation of the bolt selectively spaces the outer end portion of the lever from the outer end portion of the trigger thereby varying the rotative displacement distance of the trigger to selectively control the speed control means.

Claim 4

The structure of claim 2 and further including pushbutton means disposed on said frame portion and coacting with said yoke lever to retain the trigger in preselected position.

Claim 5

A right angle electric trigger switch for portable electric motor-driven tools comprising, a switch casing having an extended frame portion formed integral with the casing, a trigger actuated switch device including a speed control means disposed in the casing, a contact carrier disposed in the casing and having an integral elongated arm extending outwardly from the carrier in the direction of the frame portion, said contact carrier being disposed in said casing and frame portion for reciprocation therein along the longitudinal axis of the carrier, said contact carrier containing at least a portion of the switch device whereby reciprocation of the contact carrier actuates the switch device and its speed control means, a bell-crank trigger pivotally mounted at its apex on the free outer end of the frame portion above the outer end portion of the arm for rotation in the longitudinal vertical plane of the carrier, one end of the bell-crank trigger being pivotally connected to the outer end of the arm, bias means disposed between the frame portion and the outer end portion of the bell-crank trigger to bias the switch device to a first preselected position, whereby displacement of the outer end portion of the trigger against the action of the bias means displaces the contact carrier to a second preselected position, and means for adjusting the displacement distance of the trigger to selectively control the speed control means, said adjusting means including elongatable means connected to said bell-crank trigger between the outer end portion of the bell-crank trigger and an adjacent frame portion for pivotal movement with said bell-crank trigger and engageable with said adjacent frame portion upon pivotal movement of the bell-crank trigger toward the adjacent frame portion to selectively adjust the distance between such outer end portion and the adjacent frame portion when the trigger is fully displaced thereby selectively controlling the associated speed control device.

Claim 6

A right angle electric trigger switch for portable electric motor-driven tools comprising, a switch casing having an extended frame portion formed integral with the casing, a trigger actuated switch device including a speed control means disposed in the casing, a contact carrier disposed in the casing and having an integral elongated arm extending outwardly from the carrier in the direction of the frame portion, said contact carrier being disposed in said casing and frame portion for reciprocation therein along the longitudinal axis of the carrier, said contact carrier containing at least a portion of the switch device whereby reciprocation of the contact carrier actuates the switch device and its speed control means, a bell-crank trigger pivotally mounted at its apex on the free outer end of the frame portion above the outer end portion of the arm for rotation in the longitudinal vertical plane of the carrier, one end of the bell-crank trigger being pivotally connected to the outer end of the arm, bias means disposed between the frame portion and the outer end portion of the bell-crank trigger to bias the switch device to a first preselected position, whereby displacement of the outer end portion of the trigger against the action of the bias means displaces the contact carrier to a second preselected position, and means for adjusting the displacement distance of the trigger to selectively control the speed control means, said adjusting means including elongatable means connected to said bell-crank trigger between the outer end portion of the bell-crank trigger and an adjacent frame portion for pivotal movement with said bell-crank trigger and engageable with said adjacent frame portion upon pivotal movement of the bell-crank trigger toward the adjacent frame portion to selectively adjust the distance between such outer end portion and the adjacent frame portion when the trigger is fully displaced thereby selectively controlling the associated speed control device.

Claim 7

The structure of claim 4 wherein said bias means is a compressed coiled spring.

Claim 8

The structure of claim 4 wherein the outer end portion of the arm is bifurcated forming a U-shaped slot with the open end of the ''''U'''' facing away from the one end of the bell-crank trigger, and said one end of the bell-crank trigger has a transverse rod thereon operatively disposed in the U-shaped slot to form a pivotal connection between the trigger and the arm.

Claim 9

The structure of claim 4 and further including pushbutton means disposed on said frame portion and coacting with said trigger to selectively retain the trigger in said second preselected position.

Claim 10

An electric switch for portable electric motor-driven tools comprising, a switch casing having an extended frame portion formed integral with the casing, a trigger actuated switch device including speed control means disposed in the casing, a contact carrier disposed in said casing for reciprocation therein along the longitudinal axis of the carrier, said contact carrier containing a portion of the switch device whereby reciprocation of the contact carrier actuates the switch device and speed control means therein, a bell-crank trigger pivotally mounted at its apex on the free outer end of the frame portion for rotation in the longitudinal vertical plane of the carrier, elongated connecting means secured at one end to the contact carrier and pivotally connected at its other end to one end of the bell-crank trigger, bias means disposed between the frame portion and the outer end portion of the bell-crank trigger to bias the switch device to a first preselected position whereby displacement of the outer end portion of the trigger against the action of the bias means displaces the contact carrier to a second preselected position, and manually adjustable elongatable means disposed between the outer end portion of the bell-crank trigger and the adjacent frame portion to selectively adjust the distance between such outer end portion and the adjacent frame portion when the trigger is fully displaced thereby selectively controlling the associated speed control device, said adjustable elongatable means including an elongated yoke lever pivoted at one end to the extended frame portion adjacent its outer end for rotation with the trigger in the longitudinal plane of the extended frame portion, the outer end portion of the lever having abutment means thereon to abut the extended frame portion in one rotative position of the lever, and a bolt rotatably secured at its one end to the outer end portion of the trigger, the other end of the bolt being threadedly secured to the outer end portion of the lever, whereby circumferential rotation of the bolt selectively spaces the outer end portion of the lever from the outer end portion of the trigger thereby varying the rotative displacement distance of the trigger to selectively control the speed control means.

Claim 11

An electric switch for portable electric motor-driven tools comprising, a switch casing having an extended frame portion formed integral with the casing, a trigger actuated switch device including speed control means disposed in the casing, a contact carrier disposed in said casing for reciprocation therein along the longitudinal axis of the carrier, said contact carrier containing a portion of the switch device whereby reciprocation of the contact carrier actuates the switch device and speed control means therein, a bell-crank trigger pivotally mounted at its apex on the free outer end of the frame portion for rotation in the longitudinal vertical plane of the carrier, elongated connecting means secured at one end to the contact carrier and pivotally connected at its other end to one end of the bell-crank trigger, bias means disposed between the frame portion and the outer end portion of the bell-crank trigger to bias the switch device to a first preselected position whereby displacement of the outer end portion of the trigger against the action of the bias means displaces the contact carrier to a second preselected position, and manually adjustable elongatable means disposed between the outer end portion of the bell-crank trigger and the adjacent frame portion to selectively adjust the distance between such outer end portion and the adjacent frame portion when the trigger is fully displaced thereby selectively controlling the associated speed control device, said adjustable elongatable means including an elongated yoke lever pivoted at one end to the extended frame portion adjacent its outer end for rotation with the trigger in the longitudinal plane of the extended frame portion, the outer end portion of the lever having abutment means thereon to abut the extended frame portion in one rotative position of the lever, and a bolt rotatably secured at its one end to the outer end portion of the trigger, the other end of the bolt being threadedly secured to the outer end portion of the lever, whereby circumferential rotation of the bolt selectively spaces the outer end portion of the lever from the outer end portion of the trigger thereby varying the rotative displacement distance of the trigger to selectively control the speed control means.