Surgery – Truss – Pad
Patent
1979-12-19
1981-11-17
Michell, Robert W.
Surgery
Truss
Pad
324 62, A61B 505
Patent
active
043005748
ABSTRACT:
A device for measuring and indicating changes in the resistance of a living body including a single battery source, a means for setting a reference voltage level provided across the battery, a unity gain high input impedance and low output impedance buffer amplifier having as its input the reference voltage level, a balanceable resistance bridge having the output of the buffer amplifier applied thereto and having the living body coupled thereto as a part of the bridge, a meter amplifier for amplifying any imbalances in the bridge caused by changes in the resistance of the living body and a meter coupled to the output of the meter amplifier for indicating the changes in resistance of the living body.
REFERENCES:
patent: 3841316 (1974-10-01), Meyer
patent: 3980073 (1976-09-01), Shaw
patent: 4016870 (1977-04-01), Lock
patent: 4112923 (1978-09-01), Tomacek
Jacobs, J., "Lie Detector," Elektor (English) vol. 1 No. 7, p. 1143 Nov. 1975.
MacPherson, R. D. et al., "Integrated Circuit Measurement of Skin Conductance", Beh. Res. Meth. & Instr. v. 8, No. 4, pp. 361-364 Aug. 1976.
Zimmer, H. et al., "Non-Polarizing, High Accuracy Skin Resistance Transducer for Digital Conversion", Am. Jrnl. and Electronics Apr.-Jun. 1964 pp. 101-104.
Jaworski Francis J.
Michell Robert W.
Zurn Frank
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