A shock sensor includes an inductance coil, a magnet, a magnetically soft material, and a support bracket for the magnetically soft material. The inductance coil and the magnet are fixed relative to each other. The magnetically soft material has one side thereof fixed on the support bracket and lies...http://www.google.fr/patents/US5483225?utm_source=gb-gplus-shareBrevet US5483225 - Structure of a shock device of a shock sensor of a burglar alarm
Structure of a shock device of a shock sensor of a burglar alarm
