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Richard L. Bennett
Abstract: An apparatus for identifying telephone cable pairs which may be in use by the customer without disturbing service, including a tone source, a simplex device and a switch circuit working in conjunction with the simplex device using the pair capacity to operate the circuit only when the proper electrical connection is made between the tapping wires of the device and each of the pair wires.
William R. Neail, Clifford A Rahm
Moisture proof cable splice employing hydrophobic powder.
Abstract: A cable splice assembly that will protect a temporary or permanent splice from contamination, particularly water is disclosed. A hydrophobic powder which forms a contamination barrier is disposed around the cables and the splice and then compressed. An enclosing means holds the powder about the splice and is compressed by tightly wrapping the enclosing means or by similar means.
James F. Simmonds
Method and apparatus for detecting faults and locating conductors in multi-conductor cables
Abstract: Detecting faults and identifying conductor parts multiconductor telephone cables is many times necessary in the maintenance of a telephone communication system. The disclosed method and apparatus for this purpose includes a tone generator for connection to a telephone conductor pair at a first location of a cable and a receiver unit having a frequency tunable amplifier, a signal detection pickup coil or probe, and a headset connected to the tunable amplifier for use at a remote cable location to detect tones imposed on the pair at the first location. The method utilizes a tone generator which has a nominal signal frequency for use at the first cable location in conjunction with a pair of cable wires. The receiving unit is temporarily coupled to the wires at the first location so that the amplifier may be tuned to the precise frequency generated by the tone producing device. The receiving unit is then carried to the remote cable position and the probe or pick-up coil is used to sense the presence of signals generated. Because the amplifier has been tuned to the precise frequency of the signal provided by the tone generator, even weak signals may be detected in the presence of considerable interference from external source. A threshold circuit is provided at the output of the tunable amplifier to enable rejection of low level interference signals and to further improve the resolution of the detection equipment.
James F. Simmonds
Fault Detection Method and Apparatus for Multiconductor Cables.
Abstract: Method and apparatus are provided for detecting the existence of physical faults such as shorts, grounds, opens, crosses, splits and punchbacks in a multiconductor cable composed of paired conductors. Such paired conductor cables are typically used in telephone transmission networks. Each of the conductors within the cable exhibit a distributed capacitance with respect to a metallic cable sheath and with respect to all of the other conductors. The various cable faults mentioned above are quickly and effectively detected by selectively conducting each pair of conductors to a test circuit. The test circuit periodically electrically charges and discharges each of the lines and in so doing provides a measurement of the distributed capacitance of each pair which may be compared with corresponding capacitance measurements obtained from the other pairs of conductors of the same cable. The comparative measurement quickly reveals any faults in the various conductors.