发明名称 |
Variable resistance electrical control units |
摘要 |
An electrical control unit operable as a rheostat or a potentiometer comprising an electrical circuit portion of a resistive electrically conducting material formed on a support in a spiral configuration, a spindle mounted for rotation about the center of the spiral, an arm non-rotatably engaged on the spindle but slidable relatively to the spindle radially with respect to the axis thereof, an electrical contact carried on the arm to move radially therewith, to make contact with said circuit portion, and a spiral guide means aligned with the circuit portion spiral and co-operable with the arm to guide said arm radially, so that the electrical contact follows the circuit portion spiral to alter the effective electrical resistance thereof in use.
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申请公布号 |
US4069466(A) |
申请公布日期 |
1978.01.17 |
申请号 |
US19760678232 |
申请日期 |
1976.04.19 |
申请人 |
R. & D. INSTRUMENTS LIMITED |
发明人 |
WILLIAMS, CHARLES NORMAN;ROBERTS, HUGH |
分类号 |
H01C10/32;(IPC1-7):H01C10/24 |
主分类号 |
H01C10/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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