Safety device in an electrically powered machine, especially a h

Details Safety device in an electrically powered machine, especially a h Safety device in an electrically powered machine, especially a h

1989-07-10

1990-11-13

Scott, J. R.

Electricity: circuit makers and breakers

Interlocking

Between plural switches

H01H 920

Patent

active

049703552

ABSTRACT:
The electrically powered machine, especially a hand-held power tool, comprises a housing, a cord to supply electrical energy, a switch changable between an "on" and an "off" position, a switch handle for operating the switch to control delivery of the electrical energy and a socket mechanism, which comprises a socket attached to a cord and a plug attached rigidly with the housing. A stop pawl is which prevents the connection of the socket to the plug in the machine, when and as long as the on-off switch is in the "on" position, thus preventing an unintentional start-up.

REFERENCES:
patent: 3212938 (1965-10-01), Neuhardt et al.
patent: 3881081 (1975-04-01), Schilling et al.
patent: 4280026 (1981-07-01), Alessio
patent: 4335286 (1982-06-01), Nelson
patent: 4604505 (1986-08-01), Henninger

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