Lock controlled power shut-off system

Details Lock controlled power shut-off system Lock controlled power shut-off system

1978-02-21

1980-02-19

Broome, Harold

Electricity: magnetically operated switches, magnets, and electr

Permanent magnet-actuated switches

200 6167, H01H 314

Patent

active

041896920

ABSTRACT:
A lock controlled power shut-off system provides for conserving power that would otherwise be wasted in an apartment building or the like by operating air conditioners or like power consuming equipment while the occupants are temporarily out of the building. The system includes a lock mechanism for a door or like access closure, and a sensor that causes the power consuming equipment to be disabled unless an occupant inside the building locks the lock mechanism. According to an advantageous feature, a person outside the building cannot lock the lock mechanism but can unlock it so that access can be gained into the building in an emergency.

REFERENCES:
patent: 1724930 (1929-08-01), Hart
patent: 2756300 (1956-07-01), Thiberville
patent: 3803575 (1974-04-01), Gotanda
patent: 3810145 (1974-05-01), Gusaras
patent: 4058740 (1977-11-01), Dalton et al.

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