Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific circuit breaker or control structure
Patent
1997-09-10
1999-09-21
Gaffin, Jeffrey A.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific circuit breaker or control structure
361 93, 361 8, 361 9, 361 13, H01H 7300
Patent
active
059562226
ABSTRACT:
An electronic switch circuit for controlling a main circuit including a power source and a load, the electronic switch circuit including (a) an electromagnetic relay device including an electromagnet and at least two contacts, the electromagnetic relay device being connectable in series to the power source and the load of the main circuit; (b) a controlled semiconductor device being a part of the electronic switch circuit; (c) a semiconductor command circuit being connected to the semiconductor device, the semiconductor command circuit serving for controlling the operation of the controlled semiconductor device; (d) a relay command circuit being connected to the electromagnet of the electromagnetic relay device and to the semiconductor command circuit, the relay command circuit serving for controlling the relay device and the semiconductor command circuit; (e) an overload sensor serving for determining a current load flowing through the main circuit and for reporting the relay command circuit of a current overload; (f) a resistor being connected in series to the controlled semiconductor device; and (g) an inducer being connectable in series to the load, the inducer being positioned in close proximity to the electromagnet of the electromagnetic relay device; wherein when the contacts of the relay device are disconnected, the resistor which thereby experiences a higher current load, automatically signals the semiconductor command circuit, which in turn turns the controlled semiconductor device off; and further wherein when the inducer experiences a current load above a predetermined threshold the inducer generates an induction field of a magnitude sufficient to induce the electromagnet of the electromagnetic relay device to disconnect the contacts.
REFERENCES:
patent: 4420784 (1983-12-01), Chen et al.
patent: 4532570 (1985-07-01), Thornley et al.
patent: 4652962 (1987-03-01), Howell
patent: 4704652 (1987-11-01), Billings
patent: 4772809 (1988-09-01), Koga et al.
patent: 4992904 (1991-02-01), Spencer et al.
patent: 5508878 (1996-04-01), Pecore
patent: 5528131 (1996-06-01), Marty et al.
Konstantinovsky Eduard
Wittner Lupu
Friedman Mark M.
Gaffin Jeffrey A.
Huynh Kim N.
Target Hi-Tec Electronics Ltd.
LandOfFree
Electronic switch for quick, automatic response to current overl 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 switch for quick, automatic response to current overl, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic switch for quick, automatic response to current overl will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-86118