Safety switching device for use with power equipment

Details Safety switching device for use with power equipment Safety switching device for use with power equipment

1993-12-07

1995-10-03

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

307139, H01H 4700

Patent

active

054557356

ABSTRACT:
A safety switching device for quickly prohibiting a power source from operating a piece of power equipment and for keeping the power equipment in a stopped state until a manual spring loaded start switch on the safety switching device is depressed. An electromagnetic switch in the safety switching device is arranged to open an AC power circuit to separate the power source from the piece of power equipment in case of power failure, a plug of the high voltage line is pulled from its outlet, an on/off activator switch is switched off or a manual spring loaded stop switch in the safety switching device is depressed. The safety switching device also includes a power convertor connected to the power source by an AC power cord and the on/off activator switch. The power convertor converts an AC voltage a DC voltage for energizing the electromagnetic switch and an electromagnet in a DC circuit of the safety switching device. The electromagnet holds the start switch in an "on" position until AC power is lost or the stop switch is depressed.

REFERENCES:
patent: 3371254 (1968-02-01), Hagfors
patent: 3636375 (1972-01-01), Armstrong
patent: 4048666 (1977-09-01), Irie et al.
patent: 4068274 (1978-01-01), Murphy, Jr. et al.
patent: 4366366 (1982-12-01), Ekblad
patent: 4371118 (1983-02-01), Sontheimer et al.

Affiliated with

Also associated with

Rating

Safety switching device for use with power equipment does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safety switching device for use with power equipment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety switching device for use with power equipment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1081381