Radiant energy – Invisible radiant energy responsive electric signalling – Including a radiant energy responsive gas discharge device
Patent
1984-10-19
1986-06-24
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
Including a radiant energy responsive gas discharge device
250374, 250377, G01T 1175, G01T 115, G01T 1142
Patent
active
045969337
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.
REFERENCES:
patent: 2871365 (1959-01-01), Cahen et al.
patent: 2884533 (1959-04-01), Richard-Foy
patent: 3405274 (1968-10-01), Lakin
patent: 3878496 (1975-04-01), Erickson
patent: 4419579 (1983-12-01), East
R. M. Longden-Thurgood and J. Pople, "A New Ratemeter Concept for Radiation Measuring Instruments", Nuclear Instruments and Methods, vol. 184, Nos. 2, 3, (Jun. 1981), pp. 533-536.
Bjarke George O.
Trujillo Faustin
Umbarger C. John
Waechter David A.
Wolf Michael A.
Brenner Leonard C.
Gaetiens Paul D.
Hannaher Constantine
Hightower Judson R.
Smith Alfred E.
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