Abstract An electric switch in which an insulator wire and an outer conductive spring wire are wrapped about a central conductive spring wire core with the outer conductive spring wire separated at all points from the central core in its undeformed position. The three elements are normally covered by an insulator such as a tube of insulating material. The insulating winding separates the outer spring conductive wire from the central core wire in normal usage. If pressure is applied to the outer insulating covering, the outer spring conductive wire is forced into contact with the central core completing a circuit to an alarm. As soon as the pressure is removed, the spring characteristic returns the spring conductive wires to their initial position and the alarm circuit is broken. Further, the insulating winding is also temperature sensitive so that, in the case of fire, the outer spring conductive wire will make contact with the central conductive core and again close an alarm circuit.
A switch wire comprising a central conducting spring core, an insulator spirally wound around said core with the spacing between adjacent windings of said insulator being greater than the thickness of said insulator, and a spirally wound outer spring conducting member wound around said insulator and said core without touching said core, said outer spring member having spacing between windings greater than the spacing between windings of said insulator; said spirally wound outer spring conducting member being wound in a second direction opposite from the direction of winding of said insulator.
Claim 2
Dependent Claim
91 words
A switch wire comprising a central conducting spring core, an insulator spirally wound around said core with the spacing between adjacent windings of said insulator being greater than the thickness of said insulator, and a spirally wound outer spring conducting member wound around said insulator and said core without touching said core, said outer spring member having spacing between windings greater than the spacing between windings of said insulator; said spirally wound outer spring conducting member being wound in a second direction opposite from the direction of winding of said insulator.
Claim 3
Dependent Claim
14 words
The switch wire of claim 1 wherein said outer spring wire is spring steel.
Claim 4
Dependent Claim
11 words
The switch wire of claim 1 wherein said insulator is nylon.
Claim 5
Dependent Claim
22 words
The switch wire of claim 1 including a loose fitting insulating member extending about said core, insulator, and outer spring conducting member.
Claim 6
Dependent Claim
33 words
The switch wire of claim 1 including a load circuit connected between said core and said outer conducting spring member, said load circuit including a source of electric energy and a load means.
Claim 7
Dependent Claim
13 words
The switch wire of claim 5 wherein said load is an alarm means.
Claim 8
Dependent Claim
22 words
A switch wire as defined in claim 1 in which said insulator is Manufactured from a material having a low melting point.