Abstract: A voltage regulator which regulates field current through a controlled field generator used to charge a battery, including a battery voltage sensing circuit which generates logic control signals in response to the battery voltage being above or below a predetermined level, an over-current sensing circuit which generates logic control signals in response to the charging current of the generator being above or below a predetermined level of charging current, a logic gate for gating the logic control signals, and a control circuit responsive to the signals from the logic gate to continue or interrupt field current through the field winding.
Abstract: There is disclosed a method of equalizing the voltages of the individual cells of a storage battery that consists in the steps of,1. providing a single input circuit type of d.c. to d.c. converter incorporating multiple output circuits equal in number to the number of cells of the battery to which it is planned that the converter will make connection, with the converter so designed and employed that, with its input circuit connected to the terminals of the battery, and one of each of its output circuits connected across one of each of the cells of the battery, flow of cell equalizing current will hold low so long as the downward departures of the voltages of the battery's cells from average cell voltage hold below a prescribed index value.2.
Abstract: An electrical drive vehicle with an onboard battery and a D.C. propulsion motor having means for automatically switching the D.C. motor from a series field operation to shunt field operation upon the operator actuating the braking means to convert the kinetic braking energy to electrically energy for charging, via an intermediate storage means, the onboard battery. The switching means is a variable duty cycle transistor switching means controlling the excitation of the D.C. motor in the shunt field mode.
Abstract: This invention relates to electrical aircraft engine start and generating system for use in an aircraft having an engine driven torque converter coupled to an alternator which provides AC power for conversion to DC and AC power. The system includes a reversible AC to DC converter controllably electrically coupled to the alternator and a controller unit to provide DC power in a generating mode. The reversible AC to DC converter is capable of receiving externally supplied DC power to be converted to AC power to drive the alternator as a motor in a start mode. A DC to AC converter is controllably electrically coupled to the controller unit and the DC power output during the generating mode. The reversible DC to AC converter in the start mode is mutually controllably electrically coupled to the externally supplied DC power.
Abstract: Protector accommodating pocket established by a sheet of dielectric material which is folded upon itself. Includes locking flap having an accurately located entry hole for spade type terminal. Locking shoulder is established by the flap to securely lock a protector in the pocket. A solid segment, interrupted only by a lanced portion provides maximum strength against inadvertent release of the terminal. The assembled member preferably is ultrasonically spot welded and may include a reinforcing member.
Abstract: In a battery recharging arrangement for an automotive vehicle, one or more solar batteries, together with recharging current control means to charge an automotive vehicle battery, are disposed with supporting metal fixtures at a plurality of different positions to which solar energy is applied so as to prevent the rechargeable batteries mounted in an automotive vehicle body from becoming excessively discharged. The solar batteries are positioned on the roof of a vehicle or mainly within the passenger compartment at appropriate elevation angles, so that as long as the vehicle is in the condition wherever solar energy is applied, solar energy can be obtained at any position of the sun regardless of the direction the vehicle is moving in or of the place the vehicle is parked since at least one of the disposed solar batteries will be effectively exposed to sunlight.
Abstract: An apparatus for charging a rechargeable battery including a comparator element that behaves hysteretically so that the charging apparatus upon switching to maintenance charging after a fast charge, only switches back to the fast charging when the rechargeable battery voltage has depleted sufficiently low.
Abstract: Voltage, current and field voltage of a generator connected to an electric power system are sampled at a predetermined period for analog-digital conversion and then led to a digital computer. In addition to computation for AVR, the computer computes from its input the generator output power, and also monitors the occurrence of a fault, the removal of the fault and variation in the generator output in the system. After the occurrence of a fault, the field excitation of the generator is intensified until the generator output power reaches substantially a peak value, but after the peak value is substantially passed by, the excitation is conversely depressed to a value below the level which is present before the fault occurs. When the generator output power recovers the value which is present before the fault occurs, the computer returns to deliver the AVR output.
Abstract: A method for attenuating oscillations of a rotating system.Acceleration and deceleration of the system are sensed. In dependence on an acceleration, an eddy-current brake is applied to the rotating system. In dependence on a deceleration, rotational energy is supplied to the system from a rotational energy source.
Abstract: A power service mounting system including a plurality of wall mounting brackets, each having upper and lower spaced gripping means; a power service housing having first upper and lower engagement portions on one side for engagement with the gripping means to hold the housing on the wall, and second upper and lower engaging portions on the opposite side, the housing including first electrical connection means for connection with an external power source, second electrical connection means for distributing power, and intermediate circuit means interconnecting first and second electrical connection means; and at least one equipment mounting bracket having upper and lower spaced gripping means for engagement with the second upper and lower engaging portions of the housing, one of the upper and lower spaced gripping means of the equipment mounting bracket including clamping means for urging the housing against the other of the upper and lower gripping means, and equipment mounting means on the equipment mounting b
Abstract: A power supply circuit arrangement for automotive vehicles comprises an engine-driven alternator, a storage battery, a battery charging circuit connected between the alternator and the battery including a diode poled in a sense to conduct current from the alternator to the battery and a plurality of connectors connected from the anode of the diode to supply current to associated load equipment. In one embodiment, a pair of series connected diodes is connected in inverse parallel relation with the charging diode for discharging the battery to supply current therefrom to the load equipments. A voltage detector is connected to the junction between the discharging diodes to generate a throttle opening signal when the voltage at the junction falls below a preset value.
Abstract: An energy conservation and highway safety apparatus for supplying supplemental or emergency electrical power caused by passage of vehicles over the apparatus comprising a plurality of elongated conduits having a plurality of pressure responsive pumping elements mounted therein. The conduits are connected through an accummulator to an air motor which drives a generator.
Abstract: A method of starting the engine of a vehicle, such as an automobile, over a wide range of ambient temperatures, such as in cold temperatures below 32.degree. F. and warm temperatures above 32.degree. F. The method includes the steps of energizing the starter motor of the vehicle from the vehicle battery only and starting the vehicle at warm temperatures, and providing an auxiliary battery connected in combination with the vehicle battery for starting the vehicle at cold temperatures. The invention comprehends maintaining the auxiliary battery warm separate from the vehicle during low ambient temperature conditions when the vehicle is not in use. Alternatively, the invention comprehends utilizing a small, low capacity battery which may be incapable of starting the vehicle when the battery is at the cold temperature, but which may itself start the vehicle when the battery is at warm temperatures.
Abstract: A transformerless battery charging circuit is described including a rectifier, a semiconductor switch in series with the battery, a sensing network monitoring battery voltage, a trigger circuit responsive to the sensed battery voltage for controlling operation of the semiconductor switch, and a voltage regulator for regulating output voltage of the rectifier as supplied to the triggering and battery voltage sensing networks. The circuitry in combination with an appropriate rechargeable battery also serves as a power supply to drive a DC load connected to the battery.
Abstract: Apparatus for providing a continuous indication of battery state-of-charge under load in a system in which the battery is subject to varying load conditions. The apparatus stores a value representative of battery open circuit terminal voltage and reduces the stored value while the battery is loaded at a rate proportional to the difference between the stored value and a scaled value of actual battery terminal voltage. If the scaled value exceeds the stored value, the stored value is increased to a value corresponding to the scaled value.
Abstract: An energy regulating system includes a D.C. battery electrically connected to a single phase winding of an A.C. generator through a full wave rectifying circuit. An SCR switch is directly connected in parallel to a Zener diode forming one bridge leg to selectively short circuit such Zener diode when the battery voltage exceeds a predetermined level. An integrated circuit includes a voltage comparator providing an independent, substantially constant reference signal which is compared to battery potential to provide a temperature independent gating output to the control SCR. The integrated circuit provides current limiting to maintain the gating signal within a predetermined magnitude.
Abstract: A charging system for alternatively charging cells having different physical sizes and/or electrical characteristics comprising a charge current source, a plurality of cellholder charging modules and interconnection means on said charger and said modules for selective alternative connection of each of said modules to the charger. An improved charging module utilizes resilient loading tabs and an upper resilient arm radiating from the central axis of the module.
Abstract: An electric solenoid having a bobbin structure on which a coil may be wound by machine and providing a plug-in connector with leaf-like contact terminals to which at least one end of the coil wire may be electrically connected by machine wrapping of the wire end about the terminals. The bobbin has a spool portion and a terminal block portion having a projecting formation to be positioned adjacent to the terminals, so that wire extending from the coil under tension may be wrapped first about the formation and then about the terminal to be wrapped to secure the terminal to the formation prior to subsequent wraps of the wire around the terminal.
Abstract: A device for transforming an alternating current to a direct current particularly adapted for charging of storage batteries, the device comprising a transformer, a rectifier element in series with the secondary of the transformer, a semiconductor rectifier bridge having an alternating current diagonal in series with the primary of the transformer and a direct current diagonal connected to the output of the rectifier element for diverting and rectifying part of the alternating current and delivering it in the same direction as the secondary current.