Mechanism for changing inductance of a push-button tuner

Details Mechanism for changing inductance of a push-button tuner Mechanism for changing inductance of a push-button tuner

1978-10-19

1980-05-20

Smith, Alfred E.

Tuners

Push button and/or lever-type mechanically operated tuner

74 1029, 74 1033, H03J 506, H03J 508, H03J 532

Patent

active

042041791

ABSTRACT:
A mechanism for changing inductance of a push-button tuner which is constructed to be compact and flat in size as to be adapted for use with a tape recorder. The mechanism includes flat slidable cam plates provided with cam portions at the front portions thereof, which are arranged horizontally and slidably through holes of side walls and a push-button assembly slidably arranged in a front and a rear walls, which is equipped with a channeling plate pivotable thereon the position of which may be set at a desired angle by means of the operation of manual shaft when a clutch mechanism is closed. With the advancement of the push-button plate against a coil spring arranged at the end thereof, the projections positioned on the channeling plate set at desired angle collide with the cam portions of the slidable cam plates intermittently whereby the slidable cam plates are shifted conversely and the intermittent shifting movement of the cam plates thus created are transmitted to the foot of a core carriage by turns through a rotation means connected therewith with the result that the cores mounted on the carriage are shiftable back and forth with respect to the coil bodies whereby the variation of inductance is obtained.

REFERENCES:
patent: 3247728 (1966-04-01), Wolf et al.
patent: 3737817 (1973-06-01), Ashida et al.
patent: 3863509 (1975-02-01), Zimatore et al.
patent: 4020704 (1977-05-01), Miyagi
patent: 4030052 (1977-06-01), Pelletier
patent: 4099421 (1978-07-01), Ohashi et al.

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