Abstract: A balanced magnetically-actuated proximity switch assembly for use in a monitoring system includes a switch assembly and an actuating assembly. The switch assembly has a plurality of magnetic switches with a respective magnetic directionalities. The actuating assembly is movable relative to the switch assembly and has a plurality of magnets. Each one of the magnets produces a magnetic field corresponding to the magnetic directionality of a respective one of the magnetic switches.

Abstract: A proximity switch system includes a switch portion, configured to connect and disconnect at least one electrical path, and a magnetically active actuator. The switch portion has a casing formed of a magnetically noninteracting material, at least one electrical contact disposed in the casing, a magnetically active armature member moveable along the casing between a first position and a second position, wherein the armature member contacts the electrical contact when in the first position to connect the at least one electrical path and the armature member being electrically isolated from the electric contact when in the second position to disconnect the at least one electrical path, and a magnetically active biasing member disposed in the casing, wherein the biasing member magnetically interacts with the armature member to bias the armature member in one of the first and second positions. The magnetically active actuator is movable with respect to the switch portion between proximal and distal positions.

Abstract: A non-magnetic plate, or spacer block, of is attached to the side of the switching assembly of a high security switch system. Alternatively, the actuator assembly may have an extended housing. As a result, a second actuator assembly may not be substituted for the first actuator assembly by placing the second actuator assembly on the side of the first actuator assembly and slid under the security switch assembly as the first actuator assembly is moved away for the purpose of defeating the security switch.

Abstract: A monitored security switch assembly includes a switching system, a transmission line, and a monitoring system. The switching system has a load element. The security switch assembly uses an oscillatory voltage to determine if the monitoring system, the switching system and the transmission line are impedance matched. The security switch system can function in a transmission mode or a reflection mode.

Abstract: A magnetically-actuated, proximity switch system for use in physical security monitoring systems, machinery control systems and the like, including a stationary assembly and an actuator assembly moveable relative thereto. The stationary assembly includes at least two electrically-interconnected magnetic reed switches and at least two interacting permanent biasing magnets disposed in a predetermined physical relationship. The magnets are arranged to have opposing polarity orientations which produce a resultant interactive magnetic field. Each reed switch is biased in a magnetically actuated state by its orientation and position within that field. The actuator assembly in turn includes at least two permanent actuating magnets arranged to produce a number of apparent magnetic poles corresponding to the number of apparent (or consequent) poles produced by the permanent biasing magnets and in opposition thereto.

Abstract: A rotating electric machine with a permanent magnet rotor, provided with a stator composed of a winding and a ferrite structure to provide low power losses and improved efficiency particularly at high rotor revolution rates, is constructed so as to optimize the performance of the permanent magnets on the rotor. In the preferred embodiment of the invention, the ferrite being selected for its low hysteresis and eddy current power losses, generically referred to as core loss and its low loss factor which are frequency dependent, replaces laminated electrical iron. Additionally the permanent magnets selected to exhibit high intrinsic magnetic intensity and low remanent magnetic flux density, are arranged in conjunction with the ferrite to maximize the magnet's energy product as well as the magnetic circuit gap length, which in combination provides a radical improvement in machine energy density.

Abstract: A rotating electric machine with a cylindrical rotor and a cylindrical stator enclosing the rotor is provided with coatings on the outer surface of the rotor and the inner surface of the stator for the enhancement of radiative heat exchange between these components.

Abstract: A rotating electric machine with a permanent magnet rotor, provided with a stator composed of a winding and a ferrite structure to provide low power losses and improved efficiency particularly at high rotor revolution rates, is constructed so as to optimize the performance of the permanent magnets on the rotor. In the preferred embodiment of the invention, the ferrite being selected for its low hysteresis and eddy current power losses, generically referred to as core loss and its low loss factor which are frequency dependent, replaces laminated electrical iron. Additionally the permanent magnets selected to exhibit high intrinsic magnetic intensity and low remanent magnetic flux density, are arranged in conjunction with the ferrite to maximize the magnet's energy product as well as the magnetic circuit gap length, which in a combination provides a radical improvement in machine energy density.