Manually guided machine tool with a safety device

Details Manually guided machine tool with a safety device Manually guided machine tool with a safety device

1998-04-23

2000-04-25

Jackson, Stephen W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 42, 361 45, 361 931, 361115, H02H 300

Patent

active

060551429

ABSTRACT:
A hand held machine tool has a protective electrode (1; 1a, 1b, 1c) located within a housing with a leakage current protective switch (2; 2a, 2b, 2c) triggered by a fixed leakage current (.SIGMA.1.sub..DELTA.), for example, 10 mA, for interrupting power supply leads (4, 5) of the machine tool with a protective conductor (3) connected to the protective electrode (1; 1a, 1b, 1c) and not being switched off.

REFERENCES:
patent: 3761774 (1973-09-01), Laughinghouse et al.

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