Safety device for an electrical appliance

Details Safety device for an electrical appliance Safety device for an electrical appliance

1989-02-13

1990-08-21

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361178, 307118, 307326, H02H 316

Patent

active

049511696

ABSTRACT:
A safety device adapted for use in a hand held tool for minimizing electrical shock from an AC power supply to a user includes a gound plane disposed inside the electrical tool, which, should the tool become immersed in water or become unreasonably wet, provides a path for electrical current, which energizes a solenoid which, in turn, disconnects the AC power supply. The safety device is encased in a cartridge or module. The safety device contains a power supply, such as a electret and/or a battery, that is independent of the AC power supply. Thus, the safety device can be tripped even if the tool is not plugged in or turned on.

REFERENCES:
patent: 4464582 (1984-08-01), Aragaki et al.
patent: 4709293 (1987-11-01), Gershen et al.
patent: 4734822 (1988-03-01), Gilardori et al.
patent: 4791519 (1988-12-01), Madsen

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