Abstract: A polarized electromagnetic relay includes a flat-shaped armature pivotally supported at its center, an electromagnet with a pair of pole members extending toward the armature ends on either side of the center pivot axis, and a three-pole magnetized permanent magnet bridging between the pole members in generally parallel relation with the armature. A pair of movable contact springs extends along the lateral sides of the armature and joined at its center portion to the armature to be movable therewith. Integrally formed with each movable contact spring is a pivot arm which extends transversely from the center thereof and is fixedly secured to a relay casing. The pivot arm defines itself a resilient torsion element of limited deformability by which the armature is supported on the relay casing and is permitted to pivot about the center pivot axis for movement between the two angular positions.

Abstract: A control system for a combinatorial weighing or counting apparatus includes a main central processing unit for effecting a combinatorial arithmetic operation, and a plurality of individual drive unit central processing units. The drive unit central processing units are associated respectively with driver units of the weighing machines and connected to the main central processing unit for controlling the drive units, respectively. Operation commands delivered from the main central processing unit to the individual drive unit central processing units are set by interrupt processes of the individual drive unit, central processing units at all times.

Abstract: The present invention concerns a process for correcting the output level of a charge-transfer device, as well as a device for operating the same. Said process comprises different steps, respectively a first step where the quantities of charges corresponding to a reference signal that are stored in N stages are read successively and the values being function of the different quantities of charges read, are stored in a memory; and a second step, where before each read-out of a charges quantity, the precharge level of the output stage is modulated in function of the value of the same rank stored in the memory.

Abstract: An improved machine with automatic finger safety guard includes a machine body having a finger-accessible work space and at least one movable machine component disposed in the work space. An electric motor is connected by leads to a power source and is also connected to the movable component for powering the component. An automatic finger safety guard is installed on the machine and preferably includes a hollow tube disposed around the work space and movable between an operative protective position and an inoperative retracted position. Switches are connected to the enclosure and to the electric motor leads for automatically interrupting the powering of said movable component upon movement of the enclosure from the fully protective position to the retracted position. The machine preferably includes a resistance welding machine having a pair of welding electrodes which approach each other in the work space, at least one of which electrodes is movable into and out of the work space.

Abstract: A heating-fixing roller has over the axial direction thereof a heat-generating layer formed via the step of mixing a raw material capable of obtaining a positive temperature coefficient of resistivity characteristic by baking and a binder for holding the raw material and forming an unbaked annular substrate and the step of providing an electrode to which an applied voltage is supplied on the mixture during the forming step, and thereafter via the step of baking the unbaked annular substrate on which the electrode is formed. The heat-generating layer has a positive temperature coefficient of resistivity characteristic after the baking and has the electrode formed on the surface thereof.

Abstract: An uninterrupted power source (UPS) system is provided by utilizing a synchronous motor to power an alternator which provides the desired uninterrupted output power. Normally, the synchronous motor is powered by utility line power. However, an interruption in utility power will cause the motor-alternator set to slow down, although the inertia of the system will continue generating power. If the utility power interruption is sufficient such that the alternator output frequency drops more than 1 Hz, or if reverse power flow is detected from the synchronizing motor back into the utility grid, the motor is automatically powered by an inverter driven from a battery-powered current source. A feedback system from the alternator output insures that the inverter is synchronized with the synchronous motor in order to quickly bring the alternator's output back up to the desired voltage and frequency level.