Personal dosimeter with reminder time

Details Personal dosimeter with reminder time Personal dosimeter with reminder time

1979-12-19

1982-03-16

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

128659, 250336, 250388, 3403091, 340573, G08B 2100, G01T 102

Patent

active

043203930

ABSTRACT:
A device for individually checking exposure to radiation is sensitive to the radiation and produces an alarm (acoustic and/or optical) when a threshold radiation dose is reached. An included time-measuring device furthermore warns the user when a surveillance period has expired.
The radiation sensitive device may use an electret while the time-measuring device uses the drop in voltage of a battery occurring at the end of the discharge of the battery.

REFERENCES:
patent: 2531106 (1950-11-01), Brown et al.
patent: 2802112 (1957-08-01), Schwede
patent: 3163856 (1964-12-01), Kirby
patent: 3221166 (1965-11-01), Allenden
patent: 3355731 (1967-11-01), Jones, Jr.
patent: 3614442 (1971-10-01), Brodsky
patent: 3639844 (1972-02-01), Karklys
patent: 3878456 (1975-04-01), Erickson
patent: 3927375 (1975-12-01), Lande et al.
patent: 4197461 (1980-04-01), Umbarger et al.
patent: 4227086 (1980-10-01), Dreyfus et al.

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