Device for transmitting the condition of a switch between two parts in relative rotary movement
First Claim
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1. A switch-condition transmitting device comprising:
- a. a first assembly comprising a switch and at least two coils which are serially connected when said switch is closed;
b. a second assembly comprising a group of coils including a transmission coil and two serially connected detection coils, said coils of the second assembly being magnetically coupled to each other and being positioned so that in a first relative position of said assemblies a first coil of the first assembly is magnetically coupled to the transmission coil of the second assembly while a second coil of the first assembly is magnetically coupled to both of said detection coils;
c. exciting means for causing the transmission coil of the second assembly to generate an alternating magnetic field; and
d. detecting means coupled to the serially connected detection coils of the second assembly for producing different outputs respectively1. when the detection coils of the second assembly are excited only from the field of the transmission coil of the second assembly and2. when the detection coils of the second assembly are also excited from said second coil of the first assembly, the windings of said detection coils being such that a zero resultant voltage is induced across the serially connected detection coils when said serially connected detection coils are magnetically coupled to the transmission coil only, and a non-zero resultant voltage is induced across said serially connected detection coils when said serially connected detection coils are further magnetically coupled to the coils of the first assembly.
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Abstract
A device for transmitting the condition of a switch comprising a first assembly consisting of a switch, a first pair of coils serially connected when the switch is closed, and a second assembly consisting of a second pair of coils, magnetically coupled to each other. A first coil of the second pair generates an alternating magnetic field. A detector is coupled to the second coil of the second pair for producing different outputs respectively when the second coil of the second pair is excited only from the field of the first coil of the second pair and when the second coil of the second pair is also excited from the second coil of the first pair.
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8 Claims
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1. A switch-condition transmitting device comprising:
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a. a first assembly comprising a switch and at least two coils which are serially connected when said switch is closed; b. a second assembly comprising a group of coils including a transmission coil and two serially connected detection coils, said coils of the second assembly being magnetically coupled to each other and being positioned so that in a first relative position of said assemblies a first coil of the first assembly is magnetically coupled to the transmission coil of the second assembly while a second coil of the first assembly is magnetically coupled to both of said detection coils; c. exciting means for causing the transmission coil of the second assembly to generate an alternating magnetic field; and d. detecting means coupled to the serially connected detection coils of the second assembly for producing different outputs respectively 1. when the detection coils of the second assembly are excited only from the field of the transmission coil of the second assembly and 2. when the detection coils of the second assembly are also excited from said second coil of the first assembly, the windings of said detection coils being such that a zero resultant voltage is induced across the serially connected detection coils when said serially connected detection coils are magnetically coupled to the transmission coil only, and a non-zero resultant voltage is induced across said serially connected detection coils when said serially connected detection coils are further magnetically coupled to the coils of the first assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification