Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Patent
1997-04-02
1999-07-20
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Actuated concurrently with operation or use of art device
335205, 200 6168, H01H 316, H01H 900
Patent
active
059258616
ABSTRACT:
A security lock for a door type structure in which a latch extends between the movable door and the fixed jamb. A magnet is contained within the latch and a switch is positioned in the jamb. The magnet passes into switch operating relationship to the switch for the condition of the door closed. When the magnet is moved out of the switch operating relationship to the switch, which occurs prior to the door being opened, the change in the magnetic flux causes the switch to generate an information signal which indicates that an attempt to open the particular door has been made.
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Fromberg Sidney
Scott J. R.
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