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Title: Portable battery-free charger for radiation dosimeters

Abstract

This invention is a novel portable charger for dosimeters of the electrometer type. The charger does not require batteries or piezoelectric crystals and is of rugged construction. In a preferred embodiment, the charge includes a housing which carries means for mounting a dosimeter to be charged. The housing also includes contact means for impressing a charging voltage across the mounted dosimeter. Also, the housing carries a trigger for operating a charging system mounted in the housing. The charging system includes a magnetic loop including a permanent magnet for establishing a magnetic field through the loop. A segment of the loop is coupled to the trigger for movement thereby to positions opening and closing the loop. A coil inductively coupled with the loop generates coil-generated voltage pulses when the trigger is operated to open and close the loop. The charging system includes an electrical circuit for impressing voltage pulses from the coil across a capacitor for integrating the pulses and applying the resulting integrated voltage across the above-mentioned contact means for charging the dosimeter.

Inventors:
 [1]
  1. (Norris, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
865011
Patent Number(s):
4449049
Assignee:
United States of America as represented by United States (Washington, DC) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
portable; battery-free; charger; radiation; dosimeters; novel; electrometer; type; require; batteries; piezoelectric; crystals; rugged; construction; preferred; embodiment; charge; housing; carries; means; mounting; dosimeter; charged; contact; impressing; charging; voltage; mounted; trigger; operating; magnetic; loop; including; permanent; magnet; establishing; field; segment; coupled; movement; positions; closing; coil; inductively; generates; coil-generated; pulses; operated; close; electrical; circuit; capacitor; integrating; applying; resulting; integrated; above-mentioned; radiation dosimeter; radiation dosimeters; charging voltage; contact means; voltage pulse; voltage pulses; inductively coupled; permanent magnet; magnetic field; preferred embodiment; electrical circuit; piezoelectric crystal; free charge; piezoelectric crystals; /250/

Citation Formats

Manning, Frank W. Portable battery-free charger for radiation dosimeters. United States: N. p., 1984. Web.
Manning, Frank W. Portable battery-free charger for radiation dosimeters. United States.
Manning, Frank W. Sun . "Portable battery-free charger for radiation dosimeters". United States. https://www.osti.gov/servlets/purl/865011.
@article{osti_865011,
title = {Portable battery-free charger for radiation dosimeters},
author = {Manning, Frank W.},
abstractNote = {This invention is a novel portable charger for dosimeters of the electrometer type. The charger does not require batteries or piezoelectric crystals and is of rugged construction. In a preferred embodiment, the charge includes a housing which carries means for mounting a dosimeter to be charged. The housing also includes contact means for impressing a charging voltage across the mounted dosimeter. Also, the housing carries a trigger for operating a charging system mounted in the housing. The charging system includes a magnetic loop including a permanent magnet for establishing a magnetic field through the loop. A segment of the loop is coupled to the trigger for movement thereby to positions opening and closing the loop. A coil inductively coupled with the loop generates coil-generated voltage pulses when the trigger is operated to open and close the loop. The charging system includes an electrical circuit for impressing voltage pulses from the coil across a capacitor for integrating the pulses and applying the resulting integrated voltage across the above-mentioned contact means for charging the dosimeter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

Patent:

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