Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1974-10-07
1976-07-20
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
G06F 300
Patent
active
039710149
ABSTRACT:
A bi-directional translator may operate in a transmit non-translate mode or a transmit translate mode. In the transmit translate mode input characters in a first code appearing on a first input bus address a read only memory to read out second code translations of the characters on a first output bus. In the transmit non-translate mode the input characters are gated to the first output bus without addressing the memory. The translator may also operate in a receive translate mode or a receive non-translate mode. In the receive translate mode characters in the second code appearing on a second input bus address the memory to read out first code translations of the characters on a second output bus. In the receive non-translate mode characters in the first code appearing on the second input bus are gated to the second output bus without addressing the memory. In the first code the case of each character (upper or lower) is determined by a bit position within the character whereas the second code requires two special case characters which determine the case of the characters following them. The translator inserts the required case characters in the outgoing character sequence when operating in the transmit translate mode, and eliminates the case characters from an incoming character sequence when operating in the receive translate mode. Since the first code includes more characters than the second code, provision is made for recognizing characters of the first code having no equivalent in the second code, and preventing any character output in response to such a recognized character.
REFERENCES:
patent: 3400375 (1968-09-01), Bowling et al.
patent: 3501747 (1970-03-01), Bungard et al.
patent: 3653028 (1972-03-01), Cuccio
patent: 3701856 (1972-10-01), Stuck et al.
Miller Charles D.
Sperry Rand Corporation
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