Portable battery-free charger for radiation dosimeters

Patent · Sun Jan 01 00:00:00 EST 1984

OSTI ID:865011

Manning, Frank W ^[1]

---

1. Norris, TN

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.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4449049
• OSTI ID: 865011
• Country of Publication: United States
• Language: English

Related Subjects

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/