Switch actuated communication device

Details Switch actuated communication device Switch actuated communication device

1986-05-15

1987-11-10

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

340711, 340706, 178 26A, 178 82A, G09B 536, H03R 1300

Patent

active

047060670

ABSTRACT:
A device for generating an output information message by the manipulation of a single switch, to form a sequence of switch closures of varying duration. The device includes dot feedback circuitry responsive to a switch closure, for generating a human-sensible dot feedback signal to alert an operator that the switch closure should be discontinued if a dot signal is intended. Dot generation circuitry responds to the switch closure being discontinued within a preselected first timing interval following detection of the switch closure, and generates a dot information signal. Dash feedback circuitry responds to a switch closure that is not discontinued within the first timing interval, for generating a human-sensible dash feedback signal, to alert an operator that the switch closure is of sufficient duration to be interpreted as a dash. Dash generation circuitry responds to the switch closure being continued beyond the preselected first timing interval, and generates a dash information signal. Decoding circuitry converts a coded sequence of dot and dash information signals generated in this manner, to an output information message.

REFERENCES:
patent: 2923069 (1960-02-01), Nachem
patent: 3895185 (1975-07-01), Ramsey
patent: 4255749 (1981-03-01), Henry
patent: 4408302 (1983-10-01), Fessel et al.

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