Jack strip gage

Claim 2

Apparatus for testing and indicating the adequacy of the plug retaining power of a plug jack, said apparatus comprising a supporting body, a plug mounted to said supporting body and being of a selected configuration adapted for insertion in said jack, means mounted in said supporting body for exerting an outward biasing force of a preseleCted level thereon tending to withdraw said plug from said jack, and an indicating circuit disposed in said supporting body and cooperating with said biasing force means to produce a signal when said plug is withdrawn from said jack by a preselected amount.

Claim 3

Apparatus as recited in claim 1 wherein said biasing force means comprises a plunger slidably disposed through said supporting body on an axis substantially parallel to that of said plug, a biasing spring engaging said supporting body and said plunger such as to be under compression when said plunger is disposed within said supporting body.

Claim 4

Apparatus as recited in claim 2 further including a circumferential spring engaging shoulder disposed at a selected longitudinal position on said plunger, and wherein said biasing spring is a coil spring disposed about said plunger, having one end engaging said shoulder and the other end engaging said supporting body.

Claim 5

Apparatus as recited in claim 2 wherein said supporting body is formed of an electrically insulative material, said slidable plunger is formed of an electrically conductive material, and said indicating circuit comprises a voltage supply coupled at one side to said conductive plunger, an indicating means coupled to the other side of said voltage supply, and electrical contact means mounted on said supporting body in axial alignment with said plunger and coupled to said indicating means such that electrical current from said voltage supply flows through said indicating means only when said conductive plunger is withdrawn into said supporting body and electrically continuous with said contact means.

Claim 6

Apparatus as recited in claim 4 further including a second electrical contact means mounted on said supporting body, having an aperture therethrough adapted to slidably receive and electrically contact said conductive plunger, and being coupled to said voltage supply.

Claim 7

Apparatus as recited in claim 3 wherein the position of said spring engaging shoulder is adjustable along the longitudinal axis of said plunger to thereby adjust the level of said outward biasing force.