Abstract: In a method and system for removing particles from a surface, a portable, compressed gas can is provided containing a particle removal gas. An air ionizer unit is connected to the gas can. A high voltage potential is selectively actuated at a time when a nozzle of the gas can is depressed, the high voltage potential being positioned in the gas stream to create air ions in the gas stream which facilitate removal of the particles.

Abstract: In a method and system for removing particles from a surface, a portable, compressed gas can is provided containing a particle removal gas. An air ionizer unit is connected to the gas can. A high voltage potential is selectively actuated at a time when a nozzle of the gas can is depressed, the high voltage potential being positioned in the gas stream to create air ions in the gas stream which facilitate removal of the particles.

Abstract: An overfill sensing system uses a capacitive sensor (12) on the interior of a tank for sensing the presence of a liquid to cease the filling process. The capacitive sensor (12) includes a sensing capacitor (16) and a reference capacitor (18) on separate arms of a bridge circuit (22). An oscillator (28) supplies an AC signal to the bridge circuit (22) divided by a variable resistor (30 ) to balance the bridge (22). A comparator (24) receives the output on each arm of the bridge (22) to sense a differential therebetween. When a liquid reaches the sensing capacitor (16), the capacitance changes from a predetermined capacitance, thereby changing the differential. A control circuit (14) is responsive to the differential at the output of the comparator (24) for visually indicating the status of the filling process and ceasing the filling process from the filling facility when a liquid has been detected.

Abstract: An inductively-coupled signalling system having multiple waveforms, for exchanging information between a vehicle and a storage facility, said system including a safety, separable signal-coupling device comprising a signal-transmitting coil carried in a housing and disposed at an accessible location at or on the vehicle, and a signal-receiving coil carried by a cable having a second housing, said cable leading to a signal-receiving and deciphering means located at the storage facility. The two housings of the coupling device are adapted for juxtaposition to each other so as to locate the coils thereof in inductive relation. A magnetic keeper part on one of the housings and a magnet part on the other housing releasably retain the housings in operative relation when the coupling device is in use. The receiving coil housing constitutes almost a complete magnetic shield for the receiving coil so as to minimize stray pick-up of spurious signals.