Rheostat trimmer with an oblique contact wiper

Details Rheostat trimmer with an oblique contact wiper Rheostat trimmer with an oblique contact wiper

H - Electricity

01

C

338/14

H01C 10/30 (2006.01) H01C 10/26 (2006.01)

Patent

CA 1133083

RHEOSTAT TRIMMER Abstract of the Disclosure A rheostat (10) has a disk-shaped base (11) that is slidably mounted between a pair of spaced terminal pins (12, 13). A resistance track (14) is disposed on top of the base (11) and is connected to a collector track (15) that is disposed around the circumference of the base (11). A collector terminal pin (12) has contacts (12d) in sliding engagement with the collector track (15), and a wiper terminal pin (13) has an oblique contact surface formed by projections (13g) that slidably engage the resistance track (14). The terminal pins (12, 13) can be mounted on a supporting suface, so that as the base (11) is rotated, the resistance between the terminal pins (12, 13) is varied. The oblique contact surface on the wiper terminal pin (13) aids in maintaining a balanced current distribution in the resistance track (14).

334772

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