Switching and control mechanisms

Details Switching and control mechanisms Switching and control mechanisms

1993-12-29

1994-10-25

Pellinen, A. D.

Electricity: circuit makers and breakers

Special application

Frangible or destructible type

200 5A, 200300, H01H 8500

Patent

active

053591682

ABSTRACT:
In FIG. 1, an electrical circuit on a circuit board 9 can be controlled by operation of switches 2B, 3B, 4B. These are operated by removing portions of the board 9, effected by the snapping off of respective corresponding cover member portions 2A, 3A and 4A.
When used as a thermal log this control can respectively activate, deactivate and display the thermal data but avoid any tampering.

REFERENCES:
patent: 3822369 (1974-07-01), Kunczynski
patent: 3974375 (1976-08-01), Sturm
patent: 4985808 (1991-01-01), Zernov

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