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FR2658853A1
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Dissuasive method of detecting a lock-breaking attempt by covering it and use of an electronic alarm.
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EP0052891A1
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Dissuasive method and arrangement for detecting a lock-breaking attempt
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EP0004229A1
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Magnetic remote control of a bistable relay
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FR2415873A2
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Magnetically operated bistable reed switch - has integral magnet maintaining first state and free magnet causing change to second state
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FR2412931A1
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Antitheft magnetically operated switch esp. for vehicles - has sealed reed switch and magnet, and key having two magnetic pieces to close flux circuit
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