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Title: Batteryless magneto-driven portable radiac

Abstract

A hand-powered alternator for generating an alternating voltage provides same through a rectifier to a high capacity capacitor which stores the resultant dc voltage and drives a voltage regulator to provide a constant low voltage output for a portable radiation detection instrument. The instrument includes a Geiger-Muller detector tube whose output is fed to a pulse detector and then through an event counter and LCD driver circuit to an LCD bar graph for visual display. An audio driver and an audio output is also provided. All circuitry used is low power so that the capacitor can be readily charged to a sufficient level to provide power for at least 30 minutes. A low voltage indicator is provided on the LCD display to indicate the need for manual recharging.

Inventors:
 [1];  [1];  [1];  [1];  [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865896
Patent Number(s):
4596933
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
batteryless; magneto-driven; portable; radiac; hand-powered; alternator; generating; alternating; voltage; provides; rectifier; capacity; capacitor; stores; resultant; dc; drives; regulator; provide; constant; output; radiation; detection; instrument; geiger-muller; detector; tube; fed; pulse; event; counter; lcd; driver; circuit; bar; graph; visual; display; audio; provided; circuitry; power; readily; charged; sufficient; level; 30; minutes; indicator; indicate; manual; recharging; visual display; voltage regulator; pulse detector; voltage output; dc voltage; radiation detection; detector tube; detection instrument; event count; voltage provide; alternating voltage; /250/

Citation Formats

Waechter, David A, Bjarke, George O, Trujillo, Faustin, Wolf, Michael A, and Umbarger, C John. Batteryless magneto-driven portable radiac. United States: N. p., 1986. Web.
Waechter, David A, Bjarke, George O, Trujillo, Faustin, Wolf, Michael A, & Umbarger, C John. Batteryless magneto-driven portable radiac. United States.
Waechter, David A, Bjarke, George O, Trujillo, Faustin, Wolf, Michael A, and Umbarger, C John. Wed . "Batteryless magneto-driven portable radiac". United States. https://www.osti.gov/servlets/purl/865896.
@article{osti_865896,
title = {Batteryless magneto-driven portable radiac},
author = {Waechter, David A and Bjarke, George O and Trujillo, Faustin and Wolf, Michael A and Umbarger, C John},
abstractNote = {A hand-powered alternator for generating an alternating voltage provides same through a rectifier to a high capacity capacitor which stores the resultant dc voltage and drives a voltage regulator to provide a constant low voltage output for a portable radiation detection instrument. The instrument includes a Geiger-Muller detector tube whose output is fed to a pulse detector and then through an event counter and LCD driver circuit to an LCD bar graph for visual display. An audio driver and an audio output is also provided. All circuitry used is low power so that the capacitor can be readily charged to a sufficient level to provide power for at least 30 minutes. A low voltage indicator is provided on the LCD display to indicate the need for manual recharging.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {1}
}

Patent:

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