Idem Safety Switches Limited

Vincent Crolla

Medi Mohtasham

Hamed Faridfar

Timothy Jennings

A testing system to test safety interlock switches to ensure that they are operating normally comprising a test loop circuitwhich connects in series a plurality of safety switches, the test loop circuitis adapted to open the switchesoutputs if broken, the testing system further comprising a diagnostic meanswhich checks each switch to ensure it is operating normally when the test loop circuitis broken. The test loop circuitmay be broken when a single switchis activated to open its safety output.

Interlock switch circuit with single fault detection

A safety interlock switch with coded interlocking to provide tamper resistance, the coded interlocking having two differently coded technologies. In a preferred embodiment one technology is mechanical in the form of a coded-cam system operated by a coded-tongue, the other is electronic comprising a non-contact coded RFID sensor, and wherein the switch is only enabled when the two different codes have been correctly applied.

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Warrington, United Kingdom

Vincent Crolla