Hall effect signalling gauge
First Claim
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1. A signalling gauge comprising:
- a gauge movement responsive to a sensed condition;
a pointer mounted on said gauge movement;
a magnet attached to said pointer;
a noncaptivating, magnetically actuated switch element mounted in an influence zone of the path of said magnet.
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Abstract
A signalling gauge may utilize a non-captivating, magnetically actuated switch element which is mounted in an influence zone of a path of a magnet carried by an indicating pointer of the gauge. The gauge may operate despite the presence of dust, dirt or other pollutants for an extended period of time without inducing sparks or arcing often associated with electromechanical contacts. Hall effect switch elements such as latches or digital switches may be utilized as a switch element for signalling to drive an audio or visual alarm or a digital signal.
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Citations
19 Claims
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1. A signalling gauge comprising:
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a gauge movement responsive to a sensed condition; a pointer mounted on said gauge movement; a magnet attached to said pointer; a noncaptivating, magnetically actuated switch element mounted in an influence zone of the path of said magnet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification