Abstract: A system for controlling a high-voltage supply which is inhibited for a time after energization to prevent spurious deenergization. The high-voltage supply includes a source for generating a signal representative of the desired output high voltage. A feedback voltage control responds to this signal and controls the high-voltage supply. The system includes a source for developing a linear ramp signal which varies from an initial value at which the output of the high-voltage generator is under the control of the ramp signal source to a value at which the output of the high-voltage generator is under the control of the signal representative of the desired output high voltage.

Abstract: Procedure for monitoring the phase sequence in a three-phase network, for instance in lift operation. Between the normal voltage vectors (R,S,T) indicating the phases are added extra vectors (R',S') which are mutually opposed and equal vectors, and that the extra vectors (R',S') and the voltage vectors (R,S,T) are added up and on the basis of the sum thus obtained, necessary steps are taken.

Abstract: An automatic voltage control system controls the voltage delivered to the primary winding (12) of a step-up transformer (10) and hence the power delivered to a dehydrator (40) so as to prevent the step-up transformer (10) from exceeding rated power when a current limit occurs. The automatic voltage control system controls the voltage applied to the primary winding (12) so as to maximize the voltage applied to the grid elements (38) of the dehydrator (40). Upon encountering a current limiting condition, the automatic voltage control system reduces to zero the voltage applied to the primary winding (12) and hence the power applied to grid elements (38) of the dehydrator (40) to dissipate the cause of the current limiting condition. The voltage is reapplied to primary winding 12 at a voltage level below where the current limit occurred. The voltage is then increased to maximize the voltage applied to the grid elements (38) of the dehydrator (40).

Abstract: A switching type control unit (20) for activating fuel injectors (50) of an internal combustion engine. The control unit (20) including a plurality of switching circuits (60) for turning on and off associated hybrid power circuits (80). The hybrid power circuits (80) communicate the increased level of voltage generated by a single boost voltage generator (70) to particular injectors (50).

Abstract: Method and structures for enhancing the conductivity of graphite composite materials for lightning protection and prevention of attachment of lightning to fasteners. The integral lightning protection system for composite aircraft skins, including skins with fasteners penetrating into fuel tanks, utilizes nickel-plated graphite fibers (24) which are woven into the outer layer of fabric of the structural component (10) requiring protection.

Abstract: Transmission lines have both their terminals connected with bus lines through breakers, respectively, and connected to earth through earth switches, respectively. Protecting relay devices are fed with not only the outputs of voltage transformers and current transformers but also the contact signals made coactive with the breakers and earth switches at the terminals considered. Those contact signals are transmitted through signal transmission devices to the other terminals, and the contact signals of the breakers and earth switches at the other terminals are transmitted. The protecting relay devices detect the fault of the transmission lines, if any, to trip the breakers and to confirm the open states of the breakers from the breaker contact signals of the terminals considered and the other terminals thereby to close the earth switches.

Abstract: A relay spare circuit for a recloser relay provides an output signal selected to occur during a particular segment of the reclose cycle of a fault-responsive circuit breaker. A set of switches is provided to select which of a plurality of available recloses are to be used and where in the resulting reclose cycle the relay spare is to operate, and a logic circuit is provided which compares the selected switches with a counter responsive to advancement of the recloser relay through the reclose cycle, to provide the relay spare output signal at the selected point in the reclose cycle.

Abstract: A monitor device for use in a laser system transmitting laser light through an optical fiber includes a heat-sensitive element which produces an output to monitor the laser system, the element being provided in a predetermined area of the fiber.

Abstract: A line spacer for a pair of insulated conductors each having conductive points projecting laterally beyond the insulation thereof in a common direction at sites spaced therealong, comprising a block of insulating material having a pair of laterally spaced grooves extending therealong near opposite edges thereof and opening to a first surface of the block, the grooves being deeper than the sum of the conductor diameter added to the point projection, and means severally accessible from the opposite edges of the block for compressively retaining the conductors against motion in said grooves.

Abstract: Electrostatic spraying for pesticides comprises an electrically conducting or semi-conducting surface; means for supplying liquid adjacent the surface; and a field intensifying member in close proximity to the surface. A process for the ultra-low volume application of concentrated pesticidal formulations by means of the apparatus is also described.

Abstract: A stabilized power source parallel operation system in which the composite output current is maintained at a predetermined level even if a plurality of the parallel power sources are deenergized. Each power source has a voltage comparator, a current converter and a current comparator. The outputs of each of the voltage comparators are interconnected by an inter-power source voltage bus so that each of the current comparators compare the same current.

Abstract: A weighing and supporting device for liquid container kegs, such as those for beer. The device comprises a flat, keg-receiving platform beneath which is located a weigh scale, the platform being pivotable between an inclined, dispensing position and a horizontal, weighing position. In the latter, the platform rests upon the scale and is free to move up and down on that scale to enable the platform and a keg supported thereon to be weighed. By taking periodic measurements of the weight of the keg supported on such a device, the need for a liquid metering device in the line of liquid flow from the keg is avoided.

Abstract: A firing circuit for two antiparallel-connected power thyristors. Each of the power thyristors has a gate terminal; the gate terminals being connected by a series combination of auxiliary thyristors. Each of the auxiliary thyristors is of the type which can withstand firing resulting from excessive anode cathode potential; the sum total of the anode cathode potentials of the series-connected auxiliary thyristors being less than the anode-cathode breakdown voltages of the power thyristors. This, while a power thyristor is in a nonconductive state, an anode-cathode voltage is impressed thereacross in the forward conduction direction. At an anode-cathode voltage which is less than the breakdown voltage of the power thyristor, the auxiliary thyristors are fired so as to form a conductive path which includes the cathode-gate path of the other power thyristor, the auxiliary thyristors, and the gate-cathode path of the protected thyristor.

Abstract: The disclosed electrode assembly used with vacuum circuit interrupters has a disc-shaped electrode including four coil sections defined by four short radial slots extending radially inward at equal angular intervals from its periphery, four circumferential slots extending in a common circumferential direction from the inner ends of the radial slots and terminating short of the adjacent radial slots to define base ends of the coil sections between the ends of the circumferential slots, and a short-circuiting member including a connecting ring connected to an extremity of an electrode rod, and four L-shaped radial arms extending radially outward at equal angular intervals from the connecting ring and perpendicularly to the longitudinal axis of the ring with their free ends connected to the end portions of the coil sections remote from the base ends. The circumferential slots may have a radial slot extending radially inward toward the center of the electrode.

Abstract: An overcurrent protection apparatus for a DC motor which can be used with a speed control system of a DC motor to prevent an overcurrent condition arising when the DC motor is run with a heavy load or locked by an overload from burning or overheating windings of the motor. The apparatus is constructed using at least one integrated circuit and includes a current mirror circuit for detecting an overcurrent and for cutting off the supply current of the DC motor. A timing circuit prevents overcurrents lasting only a short time from triggering the apparatus to shut down the motor. Once the apparatus is triggered to shut off the motor, the motor will remain off for an indefinite period of time until the apparatus is reset.

Abstract: An electronic scale in particular intended to be used as a platform scale. The scale comprises a sensor device having six supporting points which in a plan view form the corners of two triangles. The supporting points situated at the corners of one of the triangles are connected to a base whereas the scale pan is supported at the supporting points at the corners of the second triangle. The sensor device comprises a body which is so connected to the different supporting points that it is subject to a bending moment when the scale pan is loaded. The sensor device is also provided with electrical means for indicating the bending moment.

Abstract: At least one planar type plasma ion source is positioned in a main duct through which charged materials pass in a manner whereby its active surface producing plasma faces the flow channel of charged materials inside the duct. The plasma ion source has at least one dielectric sheet, at least one corona electrode in operative proximity with one surface of the dielectric sheet and at least one planar type exciting electrode affixed to the opposite surface of the dielectric sheet and covering the entire area facing the corona electrode.

Abstract: A surge arrester having a first non-linear resistor block, a second non-linear resistor block connected in series with the first non-linear resistor block, a bypass gap connected in parallel with the second non-linear resistor block, and a linear resistor connected in parallel with at least one of the first and second non-linear resistor blocks.

Abstract: Disclosed is a ring magnet control circuit that permits synchrotron repetition rates much higher than the frequency of the cosinusoidal guide field of the ring magnet during particle acceleration. the control circuit generates cosinusoidal excitation currents of different frequencies in the half waves. During radio frequency acceleration of the particles in the synchrotron, the control circuit operates with a lower frequency cosine wave and thereafter the electromagnets are reset with a higher frequency half cosine wave. Flat-bottom and flat-top wave shaping circuits maintain the magnetic guide field in a relatively time-invariant mode during times when the particles are being injected into the ring magnets and when the particles are being ejected from the ring magnets.

Abstract: A secondary arc extinction device in an electric power system, including a bus bar; an electric power line connected to said bus bar; protective relaying means connected to said bus bar; a first reactance means having a first terminal connected to said electric power line; a second reactance means connected between a second terminal of said first reactance means and ground; line voltage detecting means connected to said electric power line for detecting the voltage of said electric power line; current detecting means coupled to said second reactance means for detecting the current flowing in said second reactance means; and controlling means connected to said second reactance means for controlling the reactance of said second reactance means in response to said protective relaying means, line voltage detecting means and current detecting means.