Tuners – Tuner unit with electromagnetic operator
Patent
1980-11-26
1982-04-13
Kozma, Thomas J.
Tuners
Tuner unit with electromagnetic operator
334 71, 336 20, 336 30, H03J 300
Patent
active
043250408
ABSTRACT:
Disclosed is an apparatus for adjusting an inductor that is mounted on a circuit board. The inductor is of the type comprising two extensible sections connected at one respective end to the circuit board and connected at the other respective end by a connecting portion integral to the inductor. The electrical value of the inductor is adjusted by mechanically engaging the connecting portion between first and second push rods and moving the connecting portion so as to simultaneously extend or compress the two extensible sections. The first push rod extends through an opening in the circuit board to apply mechanical force against the connecting portion and the second push rod extends from above the circuit board so as to clamp the connecting portion between the first and second push rods. In one embodiment, the linear displacement of the first push rod is controllable to selectively advance or retract the first push rod, while the second push rod exerts a substantially constant force sufficient to collapse the two extensible sections of the inductor to the extent permitted by the linear displacement of the first push rod.
Emanuel Peter M.
Jacobson Allan J.
Kozma Thomas J.
Rasmussen Paul J.
RCA Corporation
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