Abstract A method of locating a particular electrical conductor among a plurality of electrical conductors from a remote location comprises applying a pulsing current to each of said conductors in turn, and identifying the particular electrical conductor by measuring the pulsing current with a clamp-on ammeter. If certain of the electrical conductors are ''''live,'''' the ammeter will identify them by their steady current, and if other of the conductors show no current flowing, the operator knows that they are not the ones sought. The pulsing current is applied to the conductor by means of an apparatus having a synchronous motor operating against a cam member which in turn operates a make and break switch to impress a pulsing current of known amplitude to the conductor, which is subsequently identified by a clamp-on ammeter.
A cable conductor locator device comprising: a test circuit adapted to be connected to a current source, a portable stand, an electric motor mounted on said stand, a cam member drivable by said electric motor, a pushbutton make and break switch in said test circuit to open and close said test circuit for supplying a pulsing current output therefrom in response to rotative movement of said cam member, said switch mounted on the portable stand, an arm member interposed between thE cam member and the pushbutton switch and pivotally mounted on the portable stand, a first end of the arm member contactable by said cam member at a second end of the arm member contactable by said switch, said arm member pivotally responsive to movement of said cam member to open and close said switch, a socket member in said test circuit to receive a suitable light bulb, and a test lead connected to said test circuit for applying said pulsing current to the conductor to be located.
Claim 2
Dependent Claim
168 words
A cable conductor locator device comprising: a test circuit adapted to be connected to a current source, a portable stand, an electric motor mounted on said stand, a cam member drivable by said electric motor, a pushbutton make and break switch in said test circuit to open and close said test circuit for supplying a pulsing current output therefrom in response to rotative movement of said cam member, said switch mounted on the portable stand, an arm member interposed between thE cam member and the pushbutton switch and pivotally mounted on the portable stand, a first end of the arm member contactable by said cam member at a second end of the arm member contactable by said switch, said arm member pivotally responsive to movement of said cam member to open and close said switch, a socket member in said test circuit to receive a suitable light bulb, and a test lead connected to said test circuit for applying said pulsing current to the conductor to be located.
Claim 3
Dependent Claim
39 words
A cable conductor locator device as described in claim 1, wherein: said cam member includes an adjustable cam member having two adjustable cams on a single shaft in order to open and close said test circuit at desired intervals.