Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1978-12-05
1982-04-06
Sloyan, Thomas J.
Communications: electrical
Audible indication
Percussion-type sound producer
318657, 340347M, H03K 1302
Patent
active
043238840
ABSTRACT:
This invention relates to a digital-analog interface for insertion between the control circuit of a moving element and a transmitter of digital control signals.
This interface comprises an inductive detector of the actual position of the moving element. The inductive detector has a single primary winding directly connected to an a.c. source and two secondary windings. The detector secondary windings are connected in parallel to one input of a summing circuit, through a first resistance of fixed value and through a second resistance of adjustable value, respectively. Means responsive to the transmitter digital control signals are provided to adjust the value of the second resistance. The output of the summing circuit is connected to the control circuit of the moving element.
REFERENCES:
patent: 3071324 (1963-01-01), Schroeder et al.
patent: 3530386 (1970-09-01), Terry
patent: 4099245 (1978-07-01), Maysonett
patent: 4160245 (1979-07-01), Scott
The Engineering Staff of Analog Devices, Inc., Analog-Digital Conversion Handbook, 6/1972, pp. I-8 and I-9; II-34 to II-39; II-80 and II-81.
Durandeau Michel
Verdier Jean P.
Voisin Norbert
Flocks Karl W.
Sloyan Thomas J.
Societe Nationale Industrielle Aerospatiale
Starobin A. Fred
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