Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Patent
1975-04-30
1976-07-06
Scott, James R.
Electricity: circuit makers and breakers
Special application
Actuated concurrently with operation or use of art device
200 6141, 200 6178, 200 6179, 200 6181, 200318, 200327, 200332, H01H 316, H01H 320
Patent
active
039683370
ABSTRACT:
An alarm switch adapted to be mounted on the wall above a door on the side of the wall toward which the door swings open, having an electrically conductive arm adapted to be set in a position for actuation by the door, when the door swings, to swing inwardly and then upwardly into engagement with a terminal of the switch to complete an alarm circuit. The arm has a finger at its free end adapted to be set in a downwardly extending position for engagement by the door and a raised position clear of the door for deactivating the switch.
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patent: 1374684 (1921-04-01), Rieck
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patent: 2265899 (1941-12-01), Fine
patent: 2500335 (1950-03-01), Barnwell
patent: 2516163 (1950-07-01), Vaughan
patent: 3264444 (1966-08-01), Krauss et al.
patent: 3541276 (1970-11-01), Lea
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