Elongate pressure-actuated electrical switch
First Claim
1. An elongate pressure-actuated electrical switch comprising a flexible tubular body of electrically insulating material having within its bore air or other electrically insulating fluid and incorporating at opposed locations around its periphery two sectoral portions of electrically conductive material, each of which sectoral portions extends throughout the radial thickness of the wall of the tubular body;
- at least one elongate electric conductor which extends lengthwise with respect to and is in electrical contact with one of said electrically conductive sectoral portions and at least one elongate electric conductor which extends lengthwise with respect to and is in electrical contact with the other of said electrically conductive sectoral portions, said electrically conductive sectoral portions having a conductivity less than that of the conductors; and
, surrounding the flexible tubular body and elongate conductors, an overall outer sheath of electrically insulating material, which overall sheath has at least one substantially flat surface which is suitable for supporting the elongate electrical switch on a surface and which so positioned with respect to said electrically conductive sectoral portions of the flexible tubular body that one electrically conductive sectoral portion is at a position intermediate of said substantially flat surface of the outer sheath and the other electrically conductive sectoral portion.
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Accused Products
Abstract
A simple and inexpensive elongate pressure-actuated electrical switch especially suitable for security purposes comprises a flexible tubular body of insulating material having air within its bore and incorporating at opposed locations around its periphery two sectoral portions of electrically conductive material. Two elongate conductors extend lengthwise in electrical contact with the conductive sectoral portion and two electric conductors extend lengthwise in contact with the conductive sectoral portion. The sectoral portions have a conductivity less than that of the conductors. An overall outer sheath surrounds the tubular body and conductors and has a flat surface which is suitable for supporting the switch on the ground and which is so positioned with respect to the sectoral portions that one conductive sectoral portion is at a position intermediate of the flat surface and the other conductive sectoral portion. When downwardly directed pressure is applied to the sheath the opposed electrically conductive sectoral portions are pressed into contact with one another to effect electrical connection between the conductors.
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Citations
18 Claims
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1. An elongate pressure-actuated electrical switch comprising a flexible tubular body of electrically insulating material having within its bore air or other electrically insulating fluid and incorporating at opposed locations around its periphery two sectoral portions of electrically conductive material, each of which sectoral portions extends throughout the radial thickness of the wall of the tubular body;
- at least one elongate electric conductor which extends lengthwise with respect to and is in electrical contact with one of said electrically conductive sectoral portions and at least one elongate electric conductor which extends lengthwise with respect to and is in electrical contact with the other of said electrically conductive sectoral portions, said electrically conductive sectoral portions having a conductivity less than that of the conductors; and
, surrounding the flexible tubular body and elongate conductors, an overall outer sheath of electrically insulating material, which overall sheath has at least one substantially flat surface which is suitable for supporting the elongate electrical switch on a surface and which so positioned with respect to said electrically conductive sectoral portions of the flexible tubular body that one electrically conductive sectoral portion is at a position intermediate of said substantially flat surface of the outer sheath and the other electrically conductive sectoral portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- at least one elongate electric conductor which extends lengthwise with respect to and is in electrical contact with one of said electrically conductive sectoral portions and at least one elongate electric conductor which extends lengthwise with respect to and is in electrical contact with the other of said electrically conductive sectoral portions, said electrically conductive sectoral portions having a conductivity less than that of the conductors; and
Specification