Electronic monitoring system with short-circuit protection

Details Electronic monitoring system with short-circuit protection Electronic monitoring system with short-circuit protection

1974-06-24

1976-01-13

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307202, 307252W, 328 5, 331 65, 340258B, 340258C, H01H 3600, G08B 1326, H03K 1708, H03K 1772

Patent

active

039327744

ABSTRACT:
A contactless motion detector, including an oscillator and an amplifier, has an energizing circuit connected across a Zener diode in a section of a voltage divider also comprising a current-sensing resistor, another section of this divider comprising an output thyristor in parallel with a resistive branch which may be a constant-current unit. The voltage divider receives pulsating direct current from a supply circuit including a load; an ancillary thyristor has its gate and cathode connected across the current-sensing resistor so as to fire when the load current exceeds a certain limit, the two thyristors being so coupled to each other that conduction of the ancillary thyristor cuts off the output thyristor. Normally, the output thyristor is controlled by a switching transistor responding to an output signal from the motion detector; the ancillary thyristor, when conducting, may directly lower the gate potential of the output thyristor or may remove normal operating potential from a deactivating input of the detector to disable a switching transistor which controls the output thyristor in response to an output signal from the detector.

REFERENCES:
patent: 3281638 (1966-10-01), Crawford
patent: 3601621 (1971-08-01), Ritchie
patent: 3648076 (1972-03-01), Lester
patent: 3747010 (1973-07-01), Buck
patent: 3747011 (1973-07-01), Buck
patent: 3747012 (1973-07-01), Buck

Affiliated with

Also associated with

Rating

Electronic monitoring system with short-circuit protection does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic monitoring system with short-circuit protection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic monitoring system with short-circuit protection will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-749080