Recorder with circuit line tamper indicating system

Details Recorder with circuit line tamper indicating system Recorder with circuit line tamper indicating system

1983-04-18

1986-06-17

Goldberg, E. A.

Recorders

Combined with external recorder operating means

Well logging

346 33D, 368 8, 324110, G09B 1916

Patent

active

045959323

ABSTRACT:
The present invention provides a recording system for recording operating parameter information on transportation equipment, such as large trucks and the like. The recording system includes at least one circuit line for operation thereof and is characterized by a sensor for sensing circuit line impedence changes indicative of unauthorized shut down of the system, as well as a recording member responsive to the sensor for visually recording any occurrences of these impedence changes on the recording medium.

REFERENCES:
patent: 3359561 (1967-12-01), Shostek
patent: 3950759 (1976-04-01), Ziegenfuss
patent: 4395624 (1983-07-01), Wartski

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