Title:
【発明の名称】静電荷警告装置
Document Type and Number:
Japanese Patent JP2003528287
Kind Code:
A
Abstract:
A wearable device for alerting a user when a static electrical charge has developed on the user which exceeds a preset limit, prior to an accidental discharge of the static charge. The device includes a first conductive element in close proximity to the user and a second conductive element spaced a further distance from the user than the first conductive element. A high impedance differential amplifier provides a voltage signal proportional to the potential difference existing between the first and second conductive elements. A voltage level discriminator receives the voltage signal from the high impedance differential amplifier and triggers an alarm if the voltage signal exceeds a predetermined limit.
Inventors:
Robert W Wilson
Application Number:
JP2000608187A
Publication Date:
September 24, 2003
Filing Date:
July 27, 1999
Export Citation:
Assignee:
3M Innovative Properties Company
International Classes:
G01R29/24; G01R29/12; G01R31/00; (IPC1-7): G01R29/24
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)