Lever-operated variable resistor

Claim 2

A lever-operated variable resistor comprising a cap-like case, a base plate mounted on the open end of said case, a contact carrier made of insulating material and interposed between said case and said base plate, a contactor fixed on said contact carrier, a resistance element mounted on either said case or said base plate and having an outer terminal extended from the end thereof, a lever mounted on the side periphery of said contact carrier, and a collector being electrically in contact with a portion of said contactor and having a middle terminal connected thereto, said case and said base plate being provided with a couple of supporting holes opposed to each other, said supporting holes receiving supporting portions integrally formed on both sides of said contact carrier of insulating material, said contactor being in contact with said resistance element, said lever projecting through a slot formed in the side wall of said case.

Claim 3

A lever-operated variable resistor according to claim 1, further comprising a metal fitting for attaching a panel serving as a shield plate on the under side of said base plate, said metal fitting having a pair of arm portions each of which having an engaging hole.

Claim 4

A lever-operated variable resistor according to claim 1, further comprising a metal fitting for attaching a panel serving as a shield plate on the under side of said base plate, said metal fitting having a ear-shaped portion provided with a slot and an engaging hole, said lever being projected through said slot.

Claim 5

A lever-operated variable resistor comprising a cap-like case, a base plate mounted on the open end of said case, a contact carrier of insulating material interposed between said case and said base plate, supporting portions formed integrally with both sides of said contact carrier, a contactor fixed on the under side of said contact carrier, a resistance element mounted on said base plate and having an outer terminal extended from the ends thereof, a collector being electrically in contact with a portion of said contactor and having a middle terminal connected thereto, a click stop spring with end protrusions attached to the upper side of said contact carrier, a guide plate inserted into said case or mounted on the bottom of said case, a lever mounted on the side periphery of said contact carrier, said supporting portions being fitted in the supporting holes provided in the top wall of said case and said base plate, said supporting holes being opposed to each other, said contactor being in contact with said resistance element, said guide plate being provided with a recess or a hole in which said end protrusion of said click stop spring is to be fitted in, said lever being projected through a slot formed on the side wall of said case.

Claim 6

A lever-operated variable resistor comprising a cap-like case, a base plate mounted on the open end of said case, a contact carrier of insulating material interposed between said case and said base plate, supporting portions formed integrally with both sides of said contact carrier, a contactor fixed on the under side of said contact carrier, a resistance element mounted on said base plate and having an outer terminal extended from the ends thereof, a collector being electrically in contact with a portion of said contactor and having a middle terminal connected thereto, a click stop spring with end protrusions attached to the upper side of said contact carrier, a guide plate inserted into said case or mounted on the bottom of said case, a lever mounted on the side periphery of said contact carrier, said supporting portions being fitted in the supporting holes provided in the top wall of said case and said base plate, said supporting holes being opposed to each other, said contactor being in contact with said resistance element, said guide plate being provided with a recess or a hole in which said end protrusion of said click stop spring is to be fitted in, said lever being projected through a slot formed on the side wall of said case.

Claim 7

A lever-operated variable resistor according to claim 4, in which said recess or hole is so arranged that when one of said end protrusions of said click stop spring is fitted in said recess or hole, the other end protrusion is prevented from being fitted in said recess or hole.

Claim 8

A lever-operated multi-throw variable resistor comprising a first-stage variable resistor, a second-stage variable resistor, a joint shaft connecting mechanically said first-stage and said second-stage variable resistors, and a lever for effecting variable resistance, each of said first-stage and said second-stage variable resistors including a cap-like case, a base plate mounted at the open end of said case, a contact carrier of insulating material interposed between said case and said base plate, a contactor fixed on said contact carrier, a resistance element mounted on said Base plate and having an outer terminal extended from the ends thereof, and a collector being electrically in contact with a portion of said contactor and having a middle terminal connected thereto, said contact carrier of said first-stage variable resistor having supporting portions on both sides thereof formed integrally therewith, said supporting portions being fitted in a couple of supporting holes formed in the upper wall of said cap-like case and said base plate of said first-stage variable resistor opposite to each other, said contact carrier of said second-stage variable resistor being mounted on the middle stage of said joint shaft, said joint shaft having a protrusion or recess at the upper end thereof fitted in a recess or protrusion formed in the under side of said supporting portions and having the rear end fitted in a supporting hole formed in said base plate of said second-stage variable resistor, said lever being mounted on the side periphery of said contact carrier of said first-stage resistor and being projected through a slot formed in the side wall of said case of said first-stage resistor.

Claim 9

A lever-operated multi-throw variable resistor comprising a first-stage variable resistor, a second-stage variable resistor, a joint shaft connecting mechanically said first-stage and said second-stage variable resistors, and a lever for effecting variable resistance, each of said first-stage and said second-stage variable resistors including a cap-like case, a base plate mounted at the open end of said case, a contact carrier of insulating material interposed between said case and said base plate, a contactor fixed on said contact carrier, a resistance element mounted on said Base plate and having an outer terminal extended from the ends thereof, and a collector being electrically in contact with a portion of said contactor and having a middle terminal connected thereto, said contact carrier of said first-stage variable resistor having supporting portions on both sides thereof formed integrally therewith, said supporting portions being fitted in a couple of supporting holes formed in the upper wall of said cap-like case and said base plate of said first-stage variable resistor opposite to each other, said contact carrier of said second-stage variable resistor being mounted on the middle stage of said joint shaft, said joint shaft having a protrusion or recess at the upper end thereof fitted in a recess or protrusion formed in the under side of said supporting portions and having the rear end fitted in a supporting hole formed in said base plate of said second-stage variable resistor, said lever being mounted on the side periphery of said contact carrier of said first-stage resistor and being projected through a slot formed in the side wall of said case of said first-stage resistor.

Claim 10

A lever-operated multi-throw variable resistor according to claim 6, in which the bottom surface of said cap-like case constituting said second-stage variable resistor is fixedly caulked on a connecting arm of a metal fitting attached to the lower side of said base plate constituting said first-stage variable resistor.

Claim 11

A lever-operated multi-throw variable resistor comprising a first cap-like case constituting a first-stage variable resistor, a first base plate provided at the open end of said case, an operating shaft with its end fitted in a supporting hole formed in the bottom of said case, a second cap-like case constituting a second-stage resistor, a second base plate provided at the open end of said second cap-like case, a first contact carrier interposed between said first case and said first base plate, a second contact carrier interposed between said second case and said second base plate, contactors fixed on each of said contact carrier and a lever provided on the side periphery of said first contact carrier, collectors respectively being electrically in contact with a portion of said contactors and each having a middle terminal connected thereto, said operating shaft having one of its ends fitted in a supporting hole formed in the bottom of said first case, the rear end of said operating shaft being fitted in a supporting hole formed in said second base plate, said contact carrier being attached to said operating shaft, said contactors being in contact with resistance elements provided on said first and second base plates respectively, said resistance elements each having an outer terminal extended from the end thereof, said lever being projected through a slot formed on the side wall of said first case.

Claim 12

A lever-operated multi-throw variable resistor comprising a first cap-like case constituting a first-stage variable resistor, a first base plate provided at the open end of said case, an operating shaft with its end fitted in a supporting hole formed in the bottom of said case, a second cap-like case constituting a second-stage resistor, a second base plate provided at the open end of said second cap-like case, a first contact carrier interposed between said first case and said first base plate, a second contact carrier interposed between said second case and said second base plate, contactors fixed on each of said contact carrier and a lever provided on the side periphery of said first contact carrier, collectors respectively being electrically in contact with a portion of said contactors and each having a middle terminal connected thereto, said operating shaft having one of its ends fitted in a supporting hole formed in the bottom of said first case, the rear end of said operating shaft being fitted in a supporting hole formed in said second base plate, said contact carrier being attached to said operating shaft, said contactors being in contact with resistance elements provided on said first and second base plates respectively, said resistance elements each having an outer terminal extended from the end thereof, said lever being projected through a slot formed on the side wall of said first case.

Claim 13

A lever-operated multi-throw variable resistor according to claim 8, in which the bottom of said second cap-like case constituting said second-stage variable resistor is fixedly caulked on a connecting arm of a metal fitting provided on the lower side of said first base plate constituting said first-stage variable resistor.