Printed circuit board with bus connection - has external leads bridging breaks in address, data system buses which join composite components on board
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IC engine ignition test system - uses time variation of current in transformer primary as indication of functioning
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Switch selectively connecting auxiliary current source to computer - has Schmitt trigger tripped by manually operated switch only when main supply source voltage is available
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Fault detector for containers insulation - uses HV pulses which are applied to tubular electrodes, and observes rise or fall of current
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Printing system for dialled telephone digits - has stepping motor driving print wheel and time delay for resetting
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Optical fibre constructional system - has surface electric conductor for use in locating fibre fractures
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Air-core coil or transformer for communication cable - has winding elements on flat flexible support in shape of helix and with coupling effect equalised
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HF probe for leak testing insulated water pipes - has two conductors, screens and air or paper dielectric
DE2614748A1
Circuit to monitor function of indirectly acting switch - having reversing switch assigned to each switch position formed from 2 diodes in antiparallel
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Solar collector of metal-plastics laminate - having low weight for cutting to required shape and size
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Electrical insulation failure detector - is for insulated cables and uses HF AC voltage pulses applied via ring electrodes
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System for production of photographic copies - has series of flash discharge tubes operating independently and adjustable within certain spectral ranges
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Voltage compensation circuit for heavy current cable - has logic circuit controlling switching of tappings of several stepped transformers
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Circuit for simultaneous monitoring, measurement and evaluation - is for temp. of solution detected by thermocouple and delivered to intergrating voltmeter
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Overvoltage protection system for telephone lines - has antiparallel connected semiconductors triggered by voltage peaks to give fast response time
DE2535071A1
Pulse counting circuit using capacitor - has capacitor discharging through thyristor which has negative ignition voltage, and system includes LED
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Protective circuit for amplifier - compensates for interferences in cores of communication cables caused by external fields
FR2269186A1
Excitation coil cct. for DC contactors or relays - has electronic switch for pulsed voltage supply to excitation coil in holding state
DE2513043A1
DC contactor or relay operating circuit - uses voltage pulses whose frequency and duration determined by comparison with reference
DE2513079A1
Pulse generator for control circuits - has two timing circuits, one with fixed time constant and other variable
