Matches 201 - 230 out of 230 < 1 2 3 4 5
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3961143 Multi-frequency signalling system  
A multi-frequency receiver is provided as part of a system able to evaluate the presence of 2 out of 5 signals and which incorporates 5 channel paths each including a parallel resonant circuit each...
3886323 Method and apparatus for testing communications switching system space divided equipment supervisory devices  
A method and apparatus for testing a plurality of space-divided equipment units, such as junctors, of a communication switching system having a switching network for establishing connections...
3801958 DATA ACQUISITION INTERFACE  
A data acquisition interface unit for interconnecting hard contact switches and other similar binary data sources to a data receiving station, such as a digital computer. The interface comprises a...
3743936 DATA TRANSMISSION SYSTEM ON ONE LINE  
A data transmission having a central unit and data points grouped in satellite stations. The selection of any data point is performed by: transmitting from the central unit a combination of four...
3731275 DIGITAL SWITCHING NETWORK  
A solid state semiconductor matrix switch for transmitting digital data from a set of input-output leads to any one of a number of output-input leads includes circuitry for marking and selecting...
3729709 CONTROL AND IDENTIFICATION DEVICE  
A control member and identification device, especially for telecommunications exchanges, involves two associated power sources and control circuits, arranged in a parallel manner, successively or...
3644901 DIGITAL SYSTEM FOR CONTROLLING SIGNAL TRANSFERS BETWEEN REGISTERS AND DATA BUSES  
The selective transfer of data signals from selected ones of a plurality of storage registers to selected ones of a separate number of data buses is achieved by storing control signals in control...
3546672 PULSE-SUPPLYING ARRANGEMENTS  
3508200 SIGNAL RECEIVING SYSTEM HAVING RECIRCULATING DELAY LINES  
3489855 NETWORK TO DETERMINE AN AVAILABLE ROUTE THROUGH A SWITCHING NETWORK  
3470533 MATRIX SWITCHING OF SOURCES AND CONTROL  
3453421 READOUT SYSTEM BY SEQUENTIAL ADDRESSING OF COMPUTER ELEMENTS  
3445812 SEQUENCE CONTROL SYSTEM AND METHOD  
3372378 Input/output unit switch  
3368200 Signal switching apparatus with interlock circuitry  
3320590 Switching system for selectively connecting plural signal sources to output channels  
3202941 High frequency channel switching unit, employing electromechanical contact means  
3201520 Electronic switching matrix  
3201716 Plural channel switching system with impedance of on gate and off gates forming a bandpass filter  
3150302 Multiplexing apparatus for plural output device control  
3051793 Electronic selection circuits  
3031650 Memory array searching system  
2974286 Channel selector  
2951124 Electronic switching network  
2951125 Electronic switching network  
2880276 Conference circuit  
2876279 Wired broadcasting system  
2844654 Single-relay line circuit  
2810903 Code typer  
3588842 Title is not available  
Matches 201 - 230 out of 230 < 1 2 3 4 5