An operator loop complex for use in a private automatic branch exchange for connecting any one of a plurality of trunks to any one of a plurality of operator consoles via a switching network comprises a position circuit for each console and a plurality of loop circuits associated with each position circuit whereby each connection to a console is made through a position circuit and one of the loop circuits associated therewith under a common control arrangement which enables only one loop circuit...

Circuit apparatus is provided for extending the allowable distance between the subscriber's loop and the central office. To provide this feature, the circuits sense a subscriber loop line closure to add an increased voltage for the conversation path and improved supervisory signalling. With the increased voltage, the current to the subscriber's conversation path is maintained at a constant level. Further additional circuits such as a bidirectional voice frequency repeater, pulse correction circu...

This disclosure relates to a range extender having a through transmission path, a voice transmission path including a repeater, a relay for transferring back and forth between paths and a dual mode, loop current detector. In the idle state, the current detector is in a "slow" mode for the purpose of preventing (spurious) operation of the detector, except in response to an off-hook current flow. The transfer relay connects the repeater to the loop immediately after an off-hook is detected and the...

The gauge of the invention comprises an elongated generally planular body having a longitudinal slot therein for receiving a notch plate which is slideable within the body. The plate is movable between a raised position for receiving yarn wound thereover and a lower or collapsed position for removal or repositioning of the yarn. The exposed notch plate edge is provided with notch means and at least in some instances the bottom of the notch means is disposed above the gauge body edge when the pla...

Described is an endless loop magnetic tape cassette designed for tape speeds as high as 120 inches per second or higher, and capable of delivering either short messages which repeat, or capable of a continuous test signal.

The specification discloses a motor cycle in which a power unit is mounted in a frame on resilient mountings and the rear road wheel is mounted in a fork swinging on the power unit and connected to springing means. There are two mounting means and a lateral locating means between the power unit and the frame, such mountings being at the apices of a triangle lying in a plane perpendicular to the rotary axis of the rear road wheel. The mounting means are resilient and the means together, are such ...

A digital phase locked loop is provided for an input signal at a frequency f.sub.s. An n-stage counter is driven with a 2.sup.n .times.f.sub.s coherent source. The input signal and the output of the n-stage counter are coupled to a phase detector which samples the phase of the input signal. The detected signal is periodically integrated. The integrated signal is coupled to an analog to digital converter whose output controls a pulse advance or retard means which is serially coupled between the c...

A communications system including a central station connected in a series loop with a plurality of remote stations and in which under control of said central station, the remote stations in the order of their physical position transmit data to the central station.

There is disclosed a radar tracking system wherein a range measurement is obtained by measuring the interval between the transmission of an interrogating pulse and the receipt of a reply pulse from a transponder. A single range gate pulse is generated by analogue means and the range measurement is terminated by the coincident arrival of the leading edge of the first of a coded reply pulse and the range gating voltage pulse at the input of a range lock loop. The range lock loop functions to maint...

A loop for erecting a male member especially suitable for reducing the incidence of impotency. A band is provided for enveloping a portion of the male member and securing the band thereto to thereby erect such member.