High voltage indicator device
First Claim
1. Apparatus for indicating a live voltage condition in an insulated electrical conductor consisting of a central conductor wire with insulation thereon, said apparatus comprising:
- a layer of flexible semi-conducting tape wrapped continuously around the outer surface of the insulation;
a flexible electrically conductive sheath wrapped continuously around the outer surface of the semi-conducting tape;
a layer of flexible capacitive stress-relieving tape wrapped continuously around each end of the semi-conducting tape;
an outer layer of flexible electrical insulating tape wrapped continuously around and completely covering the previously-described tape layers and the electrically conductive sheath; and
electrical indicator means connected between said electrically conductive sheath and ground to provide an electrical signal when said central conductor wire is electrically energized.
1 Assignment
0 Petitions
Accused Products
Abstract
Safety apparatus for indicating a live voltage condition in an insulated electrical conductor having insulation surrounding a central conductor wire, comprises: a layer of semi-conducting tape on the outer surface of the insulation; an electrically conductive sheath consisting of a plurality of turns of wire on the outer surface of the semi-conducting tape; a layer of stress-relieving tape wrapped about each end of the semi-conducting tape and an adjacent portion of the insulation; and an outer layer of electrical insulating tape covering all the previously-described tape layers and the turns of wire which are connected to ground through a fluorescent tube. When the insulated electrical conductor is subjected to live alternating current energization at 7000 volts or more, a capacitive alternating current path is established across the insulation, between the central conductor wire and the turns of wire acting as capacitor plates, to light the fluorescent tube.
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Citations
8 Claims
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1. Apparatus for indicating a live voltage condition in an insulated electrical conductor consisting of a central conductor wire with insulation thereon, said apparatus comprising:
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a layer of flexible semi-conducting tape wrapped continuously around the outer surface of the insulation; a flexible electrically conductive sheath wrapped continuously around the outer surface of the semi-conducting tape; a layer of flexible capacitive stress-relieving tape wrapped continuously around each end of the semi-conducting tape; an outer layer of flexible electrical insulating tape wrapped continuously around and completely covering the previously-described tape layers and the electrically conductive sheath; and electrical indicator means connected between said electrically conductive sheath and ground to provide an electrical signal when said central conductor wire is electrically energized. - View Dependent Claims (2)
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3. Apparatus for indicating a live voltage condition in an insulated electrical conductor consisting of a central conductor wire with insulation thereon, said apparatus comprising:
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a layer of flexible semi-conducting tape wrapped continuously around the outer surface of the insulation; a flexible electrically conductive sheath wrapped continuously around the outer surface of the semi-conducting tape; a layer of flexible capacitive stress-relieving tape wrapped continuously around each end of the semi-conducting tape and an adjacent portion of the insulation; an outer layer of flexible electrical insulating tape wrapped continuously around and completely covering the previously-described tape layers and the electrically conductive sheath; and electrical indicator means connected between said electrically conductive sheath and ground to provide an electrical signal when said central conductor wire is electrically energized. - View Dependent Claims (4)
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5. A method of indicating a live voltage condition in an insulated electrical conductor consisting of a central conductor wire with insulation thereon, said method of comprising the steps of:
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(a) wrapping a layer of flexible semi-conducting tape continuously around the outer surface of the insulation; (b) wrapping a flexible electrical conductor continuously around the outer surface of the semi-conducting tape; (c) wrapping a layer of flexible capacitive stress-relieving tape continuously around each end of the semi-conducting tape; (d) wrapping an outer layer of flexible electrical insulation tape continuously around and completely covering the previously-described tape layers and the electrical conductor; and (e) connecting the electrical conductor to an electrical indicator means.
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6. A method of indicating a live voltage condition in an insulated electrical conductor consisting of a central conductor wire with insulation thereon, said method comprising the steps of:
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(a) wrapping a layer of flexible semi-conducting tape continuously around the outer surface of the insulation; (b) wrapping a flexible electrical conductor continuously around the outer surface of the semi-conducting tape; (c) wrapping a layer of flexible capacitive stress-relieving tape continuously around each end of the semi-conducting tape and an adjacent portion of the insulation; (d) wrapping an outer layer of flexible electrical insulating tape continuously around and completely covering the previously-described tape layers and the electrical conductor; and (e) connecting the electrical conductor to an electrical indicator means. - View Dependent Claims (7, 8)
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Specification