MOTION DETECTOR
First Claim
1. A motion detector comprising a round mobile body capable of modifying an electromagnetic field, a structure forming a confining chamber around said body with a continuously curved inner peripheral surface in rolling contact therewith, circuit means including a plurality of leads terminating adjacent said structure for setting up an electromagnetic field adapted to be disturbed by a rolling movement of said body on said inner peripheral surface from an initial position, and indicator means connected to said circuit means for registering such movement.
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Accused Products
Abstract
A mobile body is confined within a spherical or spheroidal chamber which forms part of an electric monitoring circuit, displacement of the body from an initial position resulting in changes of circuit impedance (through variations in conductance, capacitance or inductance) which are registered on an indicator.
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Citations
5 Claims
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1. A motion detector comprising a round mobile body capable of modifying an electromagnetic field, a structure forming a confining chamber around said body with a continuously curved inner peripheral surface in rolling contact therewith, circuit means including a plurality of leads terminating adjacent said structure for setting up an electromagnetic field adapted to be disturbed by a rolling movement of said body on said inner peripheral surface from an initial position, and indicator means connected to said circuit means for registering such movement.
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2. A motiOn detector as defined in claim 1 wherein said chamber is spherical .
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3. A motion detector as defined in claim 1 wherein said structure is nonmagnetic and said circuit means includes a plurality of mutually orthogonal induction coils connected to said leads adjacent said chamber, said body being magnetically permeable.
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4. A motion detector as defined in claim 1 wherein said circuit means includes capacitive elements connected to said leads and disposed close to said chamber.
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5. A motion detector as defined in claim 1 wherein said chamber is airtight and substantially free of oxidizing gases.
Specification
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Current AssigneeRobert H. Pintell
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Original AssigneeRobert H. Pintell
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InventorsPintell, Robert H.
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Primary Examiner(s)Caldwell, John W.
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Assistant Examiner(s)Bobbitt, J. Michael
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Application NumberUS04/816,660Time in Patent Office902 DaysField of Search340/258C,280,282,276,261,195,196 324/41,47 200/61.46US Class Current340/571CPC Class CodesG01V 1/16 Receiving elements for seis...G08B 13/1436 with motion detectionG08B 13/24 by interference with electr...
