Overload and ground fault protective device

Details Overload and ground fault protective device Overload and ground fault protective device

1976-08-09

1977-11-22

Schaefer, Robert K.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

340255, 307326, H02H 300

Patent

active

040598438

ABSTRACT:
An alarm system detects the electrical disconnection of electrical equipment such as an appliance which connects by a power plug to a power receptacle on an AC power line. The detection and alarm generating portion of this system is preferably located in a conventional AC power receptacle box and includes a power receptacle which accommodates a conventional power plug from the electrical equipment. When the detection and alarm system is active, a pair of switches is set upon insertion of the plug into the receptacle and, thereafter, if the plug is removed from the receptacle, the alarm is energized. In various embodiments of the invention, the alarm is also energized when any of the following events occur: 1. The power line from the plug to the electrical equipment is cut or is short circuited to ground. 2. The system in the receptacle box is mechanically disturbed. 3. AC power fails and the plug is removed from the receptacle or the power line from the plug to the electrical equipment is cut or short circuited to ground and/or the system in the box is mechanically disturbed.

REFERENCES:
patent: 3114904 (1963-12-01), Sliman
patent: 3441799 (1969-04-01), Delafrange et al.

Affiliated with

Also associated with

Rating

Overload and ground fault protective device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Overload and ground fault protective device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Overload and ground fault protective device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2260006