Electricity: motive power systems – Nonmagnetic motor
Patent
1975-09-11
1977-11-01
Duggan, Donovan F.
Electricity: motive power systems
Nonmagnetic motor
310 26, 310317, 318118, H01L 4110
Patent
active
040567613
ABSTRACT:
A sonic transducer, having a drive electromechanical transducing element and a pickup electromechanical transducing element or a single transducing element electronically operating as both, is excited through suitable power amplifiers by a voltage controlled oscillator. A phase comparator connected to these transducing elements detects the phase difference between stress and strain in the transducer. Its output is connected to an integrator circuit means which integrates the phase difference signal and applies the integrated signal to control the voltage controlled oscillator. The maximum and minimum values of the voltage which is applied to control the oscillator are independently limited by a pair of diodes connected to sources of two different voltages. An adjustably fixable phase shift circuit is interposed between the pickup transducing element and the phase comparator to permit calibration of the system for optimal operation. Amplifier and clipper circuitry interposed between the phase shift circuit and the phase comparator circuit make the oscillator output signal independent of the amplitude of the vibrations of the sonic transducer.
REFERENCES:
patent: 2745998 (1956-05-01), McPherson, Jr.
patent: 2752512 (1956-06-01), Sarratt
patent: 3166639 (1965-01-01), Babb
patent: 3447051 (1969-05-01), Attwood et al.
patent: 3701903 (1972-10-01), Merhar
patent: 3931533 (1976-01-01), Kaso et al.
patent: 3967143 (1976-06-01), Watanabe et al.
Jacoby Benjamin Franklin
Monroe Marvin E.
Duggan Donovan F.
Foster Frank H.
Quintron, Inc.
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