Keyboard oscillator circuit
United States Patent 3283057

Inventors:
Campbell Jr., Richard H.
Publication Date:
11/01/1966
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Assignee:
SEEBURG CORP
Primary Class:
84/672
Other Classes:
984/380, 327/113, 327/569
International Classes:
G10H5/04; G10H5/00
US Patent References:
2987577Time division multiplex system
3114114Voltage controlled ramp and pulse generator
3180918Tone generator system
3196201Transistor keyer
3214708Frequency-type telemeter transmitter