Electronic combination controlled means

Details Electronic combination controlled means Electronic combination controlled means

1977-11-07

1979-08-14

Salce, Patrick R.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

70278, 339 18C, 340147MD, E05B 4900, H01H 4700

Patent

active

041647769

ABSTRACT:
The present invention electronic locking device wherein a plurality of thyristors are connected in series, and key type switches whose number is equal to that of the thyristors are provided to self maintain and energize each of the thyristors. An optional set of key type switches is provided to release the self maintained and energized state of the thyristors. A resistor is provided to limit the electric power to be supplied to the gate of each thyristor. Thus a circuit which is capable of supplying a forward base bias to a transistor from the final stage of the thyristors only when the thyristors are sequentially self maintained and energized from the power source side is formed. The load, such as relays or solenoids, which is connected to the collector side of the transistor can be optionally operated by the supply of a forward bias base.

REFERENCES:
patent: 2677814 (1954-05-01), Miller
patent: 3215973 (1965-11-01), Falconer
patent: 3539977 (1970-11-01), Woertz
patent: 3731156 (1973-05-01), Watson
patent: 3739233 (1973-06-01), Edelson
patent: 3754148 (1973-08-01), Nye
patent: 3764982 (1973-10-01), Kidnocker, Jr.
patent: 4038846 (1977-08-01), Klann
"Simple Electronic Combination Lock," by Joe A. Rolf; Popular Electronics, Nov. 1973; pp. 51-53.

Affiliated with

Also associated with

Rating

Electronic combination controlled means 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 combination controlled means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic combination controlled means will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1378623