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 Title: |
US4300574:
Device for measuring and indicating changes in resistance of a living body
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Briggs, James; Pasadena, CA
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| Assignee: |
Zurn; Frank, Hollywood, CA
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| Published / Filed: |
1981-11-17
/ 1979-12-19
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| Application Number: |
US1979000105395
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| IPC Code: |
Advanced:
A61B 5/0488;
A61B 5/05;
A61B 5/053;
A61B 5/16;
G01R 17/10;
G01R 27/02;
Core:
G01R 17/00;
more...
IPC-7:
A61B 5/05;
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| ECLA Code: |
A61B5/053B4; G01R17/10;
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| U.S. Class: |
Current:
600/547;
324/692;
Original:
128/734;
324/062;
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| Field of Search: |
128/693,723,734-735
320/048
324/062-65 P,71 R
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| Priority Number: |
| 1979-12-19 |
US1979000105395 |
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| 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.
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| Attorney, Agent or Firm: |
Koda and Androlia ;
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| Primary / Asst. Examiners: |
Michell, Robert W.; Jaworski, Francis J.
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
Show 20 known family members
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First Claim:
Show all 11 claims |
I claim:
1. A device for measuring and indicating the changes in resistance of a living body comprising;
- a single battery;
- 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, said bridge being arranged such that the living body is couplable thereto as part of said bridge;
- a meter amplifier for amplifying any imbalances in the bridge caused by changes in the resistance of a living body when said living body is coupled thereto; and
- a meter coupled to the output of the meter amplifier for indicating the changes in resistance of the living body when said living body is coupled to said bridge.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 12 U.S. patent(s) that reference this one
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| Foreign References: |
None
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| Other References: |
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.
(4 pages)
Cited by 2 patents
Zimmer, H. et al., "Non-Polarizing, High Accuracy Skin Resistance Transducer for Digital Conversion", Am. Jrnl. and Electronics Apr.-Jun. 1964 pp. 101-104.
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