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| Number | Title | Issue Date |
| 4716353 | Battery charger A battery charging system including a plurality of transformers each having a primary winding, a secondary winding, and a tertiary windings, the primary windings being connected in series forming a "shared primary", a first switching network for connectin... | 12/29/1987 |
| 4710694 | Microprocessor controlled battery charger A microprocessor controlled battery charger utilizes a high frequency switching circuit and a means to read the voltage of the battery plus a timer in the circuit wherein the microprocessor is connected both to the timer and to the voltage reading means a... | 12/01/1987 |
| 4698580 | Simple automatic charging or cutoff circuit device for intermittent pulsating d.c. charging power supply A battery charging circuit which automatically cuts off whenever a battery becomes fully charged. The circuit includes a source of pulsating d.c. charging current and an SCR connected in series with a battery to be recharged. A resistor and capacitor are ... | 10/06/1987 |
| 4684869 | Electronic clinical thermometer An electronic clinical thermometer comprises a circuit for measuring and displaying the temperature of a portion being measured, a secondary battery for supplying electric power to the circuit, rectifier means connected to the secondary battery, a power r... | 08/04/1987 |
| 4670703 | Battery charger with three different charging rates A circuit for safely and rapidly charging batteries, with the charging occurring at three different rates. A first rate is used to bring a battery up to a level where it is determined to be safe for rapid rate charging. At this charge level the temperatur... | 06/02/1987 |
| 4656412 | Ferroresonant flux coupled battery charger A battery charger for incorporation into an electric-powered vehicle is disclosed. The charger includes a ferroresonant voltage-regulating circuit for providing an output voltage proportional to the frequency of an input AC voltage. A high frequency conve... | 04/07/1987 |
| 4654574 | Apparatus for reactively applying electrical energy pulses to a living body A device for therapeutic treatment of cells and tissues in a living body by non-invasively applying a developed field of pulsating electrical energy to a body site to stimulate repair or growth of bone structure at the body site containing electronic coun... | 03/31/1987 |
| 4641078 | Method for charging electrical storage batteries Apparatus and method for charging electrical storage batteries including apparatus providing a charging current of selected value and cyclical wave generator for periodically varying on the charging current as a cyclical wave form having a frequency of 2 ... | 02/03/1987 |
| 4629964 | Battery power source A regulated, low-voltage DC power source which draws energy from a standard AC outlet and uses a bank of lead-acid batteries for intermediate power storage. The power source features a multi-level charge-voltage controller which is automatically adjusted ... | 12/16/1986 |
| 4621225 | Passive transformerless battery charging circuit A flashlight battery charging circuit includes a diode bridge which full-wave rectifies an AC voltage supplied from a 120 VAC supply through a coupling capacitor. The output terminals of the bridge are coupled to the battery through a Zener diode circuit ... | 11/04/1986 |
| 4591778 | Current pulse producing circuit A direct current pulse producing circuit, which can be connected in series with a battery or battery pack to be charged or recharged, or in series with a smoothing circuit of a D.C. power supply, includes Darlington configured transistors forming part of ... | 05/27/1986 |
| 4568869 | Method of and device for reducing charging time of batteries and increasing power and torque of electric motors A method of reducing charging time of batteries and increasing power and torque of electric motors includes the step of repeatedly applying to the battery to be charged or the motor to be operated a series of relatively short pulses of relatively high vol... | 02/04/1986 |
| 4556837 | Electronic clinical thermometer An electronic clinical thermometer comprises a circuit for measuring and displaying the temperature of a portion being measured, a secondary battery for supplying electric power to the circuit, rectifier means connected to the secondary battery, a power r... | 12/03/1985 |
| 4554500 | Battery charging apparatus and method A battery charging apparatus and method is disclosed. The battery charger includes a programmable two level constant current source having an inhibit input. A clock signal is fed to counting stages which time out after a specified time, during which time ... | 11/19/1985 |
| 4549127 | Battery charging A battery charger comprises a power supply for supplying current pulses to a battery to be charged. A microprocessor receives from an analog-to-digital converter codes representing the voltage between the battery terminals with the battery off-load betwee... | 10/22/1985 |
| 4499415 | Battery rapid charging circuit A battery rapid charging circuit is disclosed which includes a DC power source supplying a DC voltage across first and second terminals between which a battery to be charged is connected, a circuit element for short-circuiting the first and second termina... | 02/12/1985 |
| 4491779 | Motor vehicle electrical system A multivoltage electrical system for a motor vehicle that has a pair of storage batteries which, in a first charging mode are charged in series from the direct voltage output terminals of a bridge rectifier connected to an alternating current generator. I... | 01/01/1985 |
| 4422032 | Battery charging circuit for maintaining a substantially constant average value of charging current despite variations in charging voltage A battery charger includes a transistor inverter. The transistor inverter includes an oscillation transformer and a switching transistor for controlling a current flowing through a primary coil of the oscillation transformer. This current charges the batt... | 12/20/1983 |
| 4394611 | Method for charging a storage battery A method for charging a lead-acid storage battery, the method comprising the steps of charging the battery at an initially high rate during an initial stage of the charging cycle, monitoring the internal battery voltage, charging the battery at a lower, f... | 07/19/1983 |
| 4387332 | Apparatus for successively charging rechargeable batteries A charging apparatus charges a plurality of rechargeable batteries individually and in succession. Each of the plurality of rechargeable batteries is coupled to one corresponding charging branch. The charging apparatus comprises a charging completion dete... | 06/07/1983 |
| 4347472 | Apparatus and method for charging a battery in a vehicle A charging system is provided for a battery or batteries located within a motor vehicle. In one form, induction energy generating means is disposed within or adjacent to the floor of a garage or a driveway on which a motor vehicle may be parked and retain... | 08/31/1982 |
| 4321523 | Battery charger and power supply circuitry 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 oper... | 03/23/1982 |
| 4284944 | Battery charging device having battery state indicating function Battery charging device having a function of indicating in sounds at least one of charging and discharging states of a storage battery, specifically adapted to be incorporated in battery operated electric implements. During charge operation, a charging ci... | 08/18/1981 |
| 4246529 | Current integrating battery charger The battery charger employs integrator means and current switch means in combination with a control circuit whereby the control circuit receives a synchronizing signal at the start of each cycle as determined by a cyclical supply or pulse generator as wel... | 01/20/1981 |
| 4237411 | Charge maintenance and continuous charging for storage batteries After-charge current is supplied at intervals T for periods TN at intensities determined by the prevailing battery temperature.... | 12/02/1980 |
| 4179647 | Dual output battery charging system The alternating current output potential of an alternator is rectified by a main rectifier circuit to provide a first charging potential and by an auxiliary rectifier circuit arrangement of the type that is enabled only in response to the presence of elec... | 12/18/1979 |
| 4056764 | Power supply system having two different types of batteries and current-limiting circuit for lower output battery A system constituted at a relatively large capacity and low output first battery such as a fuel cell, a smaller capacity and higher output second battery, and a current-limiting circuit for restricting the maximum discharge current of the first battery to... | 11/01/1977 |
| 4031449 | Electromagnetically coupled battery charger A solid state electronic battery charger which is electromagnetically coupled to one or more batteries. A charging circuit energizes a drive winding to produce an alternating field received by an associated coupler and operative to convey charging current... | 06/21/1977 |
| 3987352 | Method of charging storage battery in power supply system having another battery of larger capacity In a power supply system constituted of a relatively high output and small capacity first battery such as a lead or alkaline storage battery and a lower output and larger capacity second battery such as a fuel cell, a portion of the discharge current of t... | 10/19/1976 |
| 3963976 | Pulsed current battery charging method and apparatus A pulsed current battery charging method functions to improve battery capacity characteristics of a liquid electrolyte electrical storage battery and prolong battery useful life. Pulses of charging current are applied optionally concurrent with convention... | 06/15/1976 |
| 3959707 | Battery charger having fast charge rate and high reliability A battery charger for charging a temperature-sensitive battery in a rapid manner without damage to the battery, such batery being equipped with means for providing a reference voltage whose level changes with battery temperature in a similar fashion to th... | 05/25/1976 |
| 3943423 | Battery charging circuit Disclosed is an improved circuit for recharging batteries. It can be used with alternating current power sources having a wide range of voltage and frequencies and also with low voltage direct current power sources. A transistor switch is connected in a f... | 03/09/1976 |
| 3938020 | Charger circuit for accessory battery A charging circuit adapted to harvest excess energy from a resonating power circuit and use that energy for charging a battery. Energy is inductively transferred from the power circuit to the charging circuit allowing such circuits to remain electrically ... | 02/10/1976 |
| 3938018 | Induction charging system A normal 117-volt, 60 cycle source is converted into a high frequency signal resulting in radiation of a substantial portion of the energy in the signal. A receiving coil is inductively coupled to the radiation over a given distance substantially less tha... | 02/10/1976 |
| 3938019 | Charging of storage batteries A battery is charged using a heavy charging phase, followed by a pulse charging phase. During the latter, charging continues beyond a predetermined battery voltage, for a predetermined interval. During a measuring portion of the succeeding charging pause,... | 02/10/1976 |
