Keyboard for the preselection of electromagnetic signals

Details Keyboard for the preselection of electromagnetic signals Keyboard for the preselection of electromagnetic signals

1977-11-09

1980-11-11

Myhre, Charles J.

Machine element or mechanism

Shaft operators

Preselected position

74 1031, 74 1037, F16H 3518

Patent

active

042325609

ABSTRACT:
A pushbutton (keyboard) tuning apparatus for a radio receiver is disclosed. The apparatus comprises a flat tuning key carrying an adjustable and lockable tuning cam means (plunger) which is guided in a slot in the tuning key and locked into position by applying force to an appendage forming part of said slot. Slideable end caps are positioned on each tuning key and each cap carries a pin for selectively applying the force to the locking appendage. Each cap also carries a resilient tongue for actuating clutch disengagement of a manual rotary knob tuning apparatus having a shaft axially displaceable for releasing any pushbuttons previously depressed and being held in their depressed condition.

REFERENCES:
patent: 2217066 (1940-10-01), Manning
patent: 2424845 (1947-07-01), Plensler
patent: 3247728 (1966-04-01), Wolf
patent: 3602051 (1971-08-01), Olak
patent: 3863509 (1975-02-01), Zimatore
patent: 3906806 (1975-09-01), Harlan
patent: 3943779 (1976-03-01), Ganderton
patent: 4120207 (1978-10-01), Dellantonio
patent: 4133214 (1979-01-01), Cicala
patent: 4141254 (1979-02-01), Spakman

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