Keying apparatus

Details Keying apparatus Keying apparatus

1975-12-05

1977-10-11

Robinson, Thomas A.

Communications: electrical

Audible indication

Percussion-type sound producer

G08C 908

Patent

active

040538800

ABSTRACT:
A keying apparatus utilizing a plurality of key pins arranged in a predetermined configuration which may be preset to accept a coded pattern that may be used to set keyguns.

REFERENCES:
patent: 1110872 (1914-09-01), Borschnek
patent: 2376846 (1945-05-01), Field et al.
patent: 2627599 (1953-02-01), MacKay
patent: 2948886 (1960-08-01), McIlwain

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