Abstract: Disclosed is an electrical receptacle which is safe for children yet easy for adults to use. This electrical receptacle provides power only to a properly inserted plug and makes use of one or more sensors which are able to detect blade insertion, ground plug insertion, presence of the plug face motion near the receptacle face or a combination thereof. The receptacle includes a contact assembly adapted and configured to conductively couple each blade of the plug to a conductor, one or more sensors, and a control circuit; wherein the control circuit determines whether or not to provide power to the properly inserted plug by determining if substantially simultaneous insertion has occurred.

Abstract: Disclosed is an electrical receptacle which is safe for children yet easy for adults to use. This electrical receptacle provides power only to a properly inserted plug and makes use of one or more sensors which are able to detect blade insertion, ground plug insertion, presence of the plug face motion near the receptacle face or a combination thereof. The receptacle includes a contact assembly adapted and configured to conductively couple each blade of the plug to a conductor, one or more sensors, and a control circuit; wherein the control circuit determines whether or not to provide power to the properly inserted plug by determining if substantially simultaneous insertion has occurred.

Abstract: Disclosed is an electrical receptacle which is safe for children yet easy for adults to use. This electrical receptacle provides power only to a properly inserted plug and makes use of one or more sensors which are able to detect blade insertion, ground plug insertion, presence of the plug face motion near the receptacle face or a combination thereof The receptacle includes a contact assembly adapted and configured to conductively couple each blade of the plug to a conductor, one or more sensors, and a control circuit; wherein the control circuit determines whether or not to provide power to the properly inserted plug by determining if substantially simultaneous insertion has occurred.

Abstract: A laser sensor for detecting the volume of particulate material being conveyed by a paddle conveyor. The sensor comprises two opposed units, a master unit and a slave unit. Each unit is provided with a single laser emitting diode and four photo detectors. The master unit is provided with a microprocessor for providing a square wave laser firing signal to the lasers. The slave unit is provided with an inverter for inverting the laser firing signal from the microprocessor. The lasers are fired sequentially when they receive a high pulse from the square wave emitted from the microprocessor. The photo detectors transmit their laser light detection signal when they receive a low pulse from the microprocessor which indicates the opposed laser has fired.