Abstract: A method and system are disclosed for a high current electrical switch. The switch may be suitable for switching, rectifying or blocking direct current in the range of one to a thousand amperes per module or assembly. It does so with such high efficiency that it produces relatively insignificant heat; such that it requires little or no cooling by convection or radiation. The relatively low heat that is generated in the process is conducted away quite effectively by the electric cables connected to the device.

Abstract: According to one embodiment of the present invention, there is provided an arrangement and method for providing power to an electrical system and to at least one auxiliary power outlet used to provide electrical power for auxiliary equipment, such as welding equipment, lighting equipment and other auxiliary electrical equipment, as well as providing a booster outlet to charge batteries such as vehicle batteries when the arrangement is used on board a vehicle. The arrangement and method utilizes an alternator used, in one embodiment, to charge at least one battery for the electrical system and switches the output of the alternator between a battery charging mode of operation and an auxiliary power mode of operation. The arrangement of the disclosed embodiment of the present invention includes a voltage regulator such, for example, as a pulse width modulation circuit for the alternator.

Abstract: According to one embodiment of the present invention, there is provided an arrangement and method for providing power to an electrical system and to at least one auxiliary power outlet used to provide electrical power for auxiliary equipment, such as welding equipment, lighting equipment and other auxiliary electrical equipment, as well as providing a booster outlet to charge batteries such as vehicle batteries when the arrangement is used on board a vehicle. The arrangement and method utilizes an alternator used, in one embodiment, to charge at least one battery for the electrical system and switches the output of the alternator between a battery charging mode of operation and an auxiliary power mode of operation. The arrangement of the disclosed embodiment of the present invention includes a voltage regulator such, for example, as a pulse width modulation circuit for the alternator.

Abstract: The electronically controlled locking apparatus is used with a door such as a safe door, and enables the door to be released by either a mechanical combination lock or an electrical lock control circuit. The control circuit generates an output signal when a correct access code is entered by a user for causing a control linkage to release the door. Alternatively, the mechanical lock can also cause the control linkage to release the door by authorized personnel, in the event of either a control circuit malfunction, or the authorized user being unable to recall the access code. The circuit includes both a non-volatile and a volatile memory means for storing the access code, and a display device for providing a visual indication of the correct code within the protected area, so that the door can be unlocked with the mechanical lock, and then the access code for the electrical lock circuit can be viewed at the protected side of the door.

Abstract: An apparatus for releasing a locking arrangement in response to an electrical control signal to unlock a closure member, employs a pair of first and second piston cylinder assemblies that are facing one another and disposed in alignment with one another within a housing for actuating alternatingly in response to the control signal. The assemblies have reciprocatively mounted plungers for moving extensively toward and away from one another along a rectilinear path of travel. A shuttle is slideably mounted within the housing and connected on opposite sides to the distal ends of the plungers to move toward an actuated one of the cylinder assemblies. A locking cam disposed on the shuttle receives and locks a roller to position the roller partially outwardly of the housing within a side opening in the housing, and a pair of first and second unlocking cams enable the roller to move inwardly of the housing when either one of the cylinder assemblies is activated.

Abstract: The safe has a five-sided box wtih a door mounted thereon to swing between opened and closed positions. A latch locks the door when in a closed position. An electronic locking arrangement responds to a digital access code for operating the latch in a rapid manner. A combination dial controlled mechanical lock is also employed for entering a combination code into the mechanical lock for operating the latch independently of the electronic latching arrangement. The five-sided box is made from pieces of sheet metal, one of which is folded along two spaced parallel lines to form three sides, to provide the box with few seams. Special hinges are provided inside the box for mounting the door swingably. The hinges are concealed and inaccessible when the door is closed, and can enable the door to be unhinged quickly by authorized persons to replace the safe door for repair or maintenance purposes.