Device for transmitting the condition of a switch between...

G - Physics – 01 – L

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340/135, 340/145

G01L 17/00 (2006.01) B60C 23/00 (2006.01) B60C 23/04 (2006.01)

Patent

CA 1052456

ABSTRACT OF THE DISCLOSURE The specification describes a switch condition transmitting device comprising a first assembly consisting of a switch and at least two coils which are serially connected when the switch is closed; a second assembly consisting of a group of coils including a transmission coil and two serially connected detection coils all of which are magnetically coupled to each other and positioned so that in a first relative position of the assemblies, one of the coils of the first assembly is magnetically coupled to the transmission coil of the second assembly while another coil of the first assembly is magnetically coupled to both of the detection coils. The device also includes exciting means for causing the trans- mission coil of the second assembly to generate and alternating the magnetic field and detecting means coupled to the serially connected detection coils of the second assembly for producing one output when the detection coils of the second assembly are excited only from the field of the transmission coiled with the second assembly and another output when the detection coils of the second assembly are also excited from the second coil of the first assembly.

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