Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1977-11-23
1980-12-09
Sloyan, Thomas J.
Communications: electrical
Audible indication
Percussion-type sound producer
177DIG3, 177210R, 307152, 340347AD, 340347M, H03K 1302, G01G 314
Patent
active
042387841
ABSTRACT:
The electronic measuring system includes a novel power supply which converts D.C. from a D.C. source to voltage pulses to drive a transducer. During intervals between transducer power pulses, an automatic drift compensation system stores an indication of system drift for use during a subsequent power pulse period. The system includes stability sensing means which render the system inoperative for measurement purposes when the signal from the measuring transducer is unstable. A plurality of sample measurement signals are taken and stored, and then passed through a programmable low pulse filter to accomplish a measurement. Thus each measurement is the result of a plurality of measurement cycles.
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patent: 3548403 (1970-12-01), Johnson
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patent: 3603972 (1971-09-01), Vanderford
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patent: 3919657 (1975-11-01), Howlett et al.
patent: 3930252 (1975-12-01), Storar
Keen Harry J.
Thomas Haydon C.
Colt Industries Operating Corp.
Sloyan Thomas J.
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