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US 4,419,639 AGranted
Key assembly
AssigneePreh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
InventorsKarl-Heinz Bauer, Gerold Eckert, Wolfgang Labude
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AssigneePreh Elektrofeinmechanische Werke Jakob Preh Nachf. GmbH & Co.
InventorsKarl-Heinz Bauer, Gerold Eckert, Wolfgang Labude
Estimating the term…
A key assembly for receiving units employed in communications engineering, articularly for television receivers, comprises a plurality of mutually releasable depressible keys adapted to switch on storable, selectively adjustable electrical values supplied by channel memories consisting of a plurality of voltage dividers for capacitance diode tuning, further comprising, in association with the respective depressible keys, a plurality of depressible and rotatable knobs adapted to be rotated by means of a tool, said knobs being concealed behind a cover member slidably guided in a recess, said knobs being adapted to provide channel tuning and, if required, selection of the desired frequency range, said frequency range being adjustable by rotating the respective depressible and rotatable knob into any of a plurality of detented angular positions with the knob being in a position differing from the tuning position of the knob, and comprising a switch which is adapted to be actuated by means of a push rod which is capable of being operated through the medium of said cover member. Said switch actuating push rod (19) in addition constitutes said tool permitting said depressible and rotatable knobs (5) to be rotated.
A key assembly for a receiving unit having a plurality of communications channels, comprising a casing with a recess for receiving a cover member, a plurality of mutually releasable depressible keys adapted to switch on storable, selectively adjustable electrical values supplied by channel memories, further comprising in association with said keys a plurality of depressible and rotatable knobs adapted to be rotated by means of a tool, a slidable cover member positioned in said recess and normally covering said knobs to conceal them, said knobs being adapted to provide channel tuning, and further comprising:
Key assembly apparatus for use with a communications receiving unit having a plurality of communications channels, comprising a plurality of tuning means for tuning respective ones of said channels, said tuning means being adapted to receive a manually operated tool for said tuning,
Dependencies are inferred from the claim text.