Enhanced safety device for an electrical appliance

Details Enhanced safety device for an electrical appliance Enhanced safety device for an electrical appliance

1989-05-22

1990-10-30

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

307118, 307326, H02H 316

Patent

active

049673084

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

REFERENCES:
patent: 4270158 (1981-05-01), Gilardoni et al.
patent: 4464582 (1984-08-01), Aragaki et al.
patent: 4709293 (1987-11-01), Gershen et al.
patent: 4734822 (1988-03-01), Gilardoni et al.
patent: 4751603 (1988-06-01), Kwon
patent: 4791519 (1988-12-01), Madsrn
patent: 4797772 (1989-01-01), Kaplonis
patent: 4823225 (1989-04-01), Foster et al.

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