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| Number | Title | Issue Date |
| 4311953 | Charger using one or more solar batteries A charger, which is useful to power a variety of compact type electronic appliances such as an electronic wristwatch, includes one or more solar batteries as a primary battery, and a sealed type silver oxide battery as a secondary battery. Both the amount... | 01/19/1982 |
| 4306183 | Voltage regulation circuit for a solar cell charging system A voltage regulation circuit includes an active integrator circuit which generates an output signal representing the time integral of the error between the voltage across a load and a reference voltage. The integrator circuit output is connected to a seri... | 12/15/1981 |
| 4296489 | Electronic timepiece An electronic timepiece including a primary battery as a power source, and a solar battery for charging the primary battery is provided. The electronic timepiece includes a solar battery for producing a charging current in response to solar light being in... | 10/20/1981 |
| 4291266 | Device for charging an accumulator from an electrical energy source more particularly for an electronic watch The invention relates to an electronic device for charging an accumulator from an electric energy source, more particularly one or more solar cells, intended in particular for an electronic wristwatch. The device represents the equivalent of an ideal diod... | 09/22/1981 |
| 4290007 | High power and high voltage transistor control circuit A transistorized circuit is used for controlling the flow of current through a high voltage source, such as a battery. The high voltage source must be capable of being tapped at voltages less than the critical voltage of the transistors in the circuit, th... | 09/15/1981 |
| 4281278 | Redundant battery protection system A satellite power system in which solar cells provide power to a load during sunlight hours and also charge, through regulators, rechargeable batteries which provide power during dark periods. In order to prevent the batteries from being overcharged by so... | 07/28/1981 |
| 4272806 | DC to DC Converter adjustable dynamically to battery condition A battery-powered DC to DC converter is operated dynamically in accordance with the condition of the battery so that an optimum compromise is made between the performance of the battery and the performance of the converter in an application such as chargi... | 06/09/1981 |
| 4266178 | Charge control circuit A charge control circuit for regulating the current applied to a secondary battery utilized as a power supply in an electronic instrument is provided. The secondary battery is adapted to be charged to a predetermined voltage level in response to a chargin... | 05/05/1981 |
| 4245286 | Buck/boost regulator A voltage regulated DC to DC converter is disclosed which is operable over a wide range of input voltage including voltages greater or less than the desired output voltage. The converter uses an inductor and a capacitor as storage elements, the inductor b... | 01/13/1981 |
| 4243928 | Voltage regulator for variant light intensity photovoltaic recharging of secondary batteries A simplified voltage regulator circuit permits varient light intensity photovoltaic recharging of secondary batteries. The regulator circuit electronically shunts serially connected regions of a photovoltaic recharger array to avoid overcharging during pe... | 01/06/1981 |
| 4240021 | Solar cell battery charging control system A solar cell battery charging control system having a storage battery and a plurality of solar cells connected in series for charging the storage battery, which system comprises a heavy load means adapted to be driven by the storage battery to discharge t... | 12/16/1980 |
| 4238820 | Variable wave-form converter A d.c./a.c. converter synthesizes an alternating voltage by suitably and at the correct instants selectively combining a plurality of direct voltage sources into a variety of series connections by means of a plurality of semiconductor controlled switches ... | 12/09/1980 |
| 4204147 | Power transfer apparatus A power transfer apparatus includes an impedance matching system coupled between a variable voltage source, e.g., a solar cell array, and a load. A parameter of the load indicative of the power being delivered to the load is sensed and the control signal ... | 05/20/1980 |
| 4186336 | Limit cycling regulator apparatus for plural parallel power sources A low dissipation shunt or series regulator apparatus is described comprising dump switching means coupled in parallel to each power source, which dump switching means is arranged for being responsive to a control signal produced by comparator means arran... | 01/29/1980 |
| 4175249 | Self-reconfiguring solar cell system A self-reconfiguring solar cell array wherein some of the cells are switched so that they can be either in series or in shunt within the array. This feature of series or parallel switching of cells allows the array to match the load to achieve maximum pow... | 11/20/1979 |
| 4163194 | Voltage-current-power meter for photovoltaic solar arrays A meter is disclosed for measuring the voltage, current, and power (VIP) parameters of a photovoltaic solar array, or array module, under sunlight operating conditions utilizing a variable load connected across the array and controlled by a voltage regula... | 07/31/1979 |
| 4151456 | Voltage regulator for battery power source A voltage regulator for a battery power source capable of maintaining a predetermined voltage until the battery voltage decays to very nearly the predetermined voltage uses a bipolar transistor in series with the battery as the control element in series w... | 04/24/1979 |
| 4143282 | Bilateral energy transfer apparatus Energy is transferred between first and second terminals by opening and closing a first current path between the first terminal and ground while concurrently operating a second current path in complementary fashion. The second current path connects in one... | 03/06/1979 |
| 4136309 | Power output control circuit for solar-powered cathodic protection system Metallic structures located in an electrolyte, such as soil or water, for example, tend to corrode. In order to prevent metal loss from the structure due to corrosion, a D.C. current flow is created in the metal structure. This current flow causes a hydro... | 01/23/1979 |
| 4134057 | Device for enabling an accumulator to be recharged from a source of electrical energy A device for enabling an accumulator to be recharged from a source of electrical energy, such as photo-cells. The device includes a converter circuit and a diode, the converter circuit being capable of adapting the current and voltage supplied by said sou... | 01/09/1979 |
| 4092712 | Regulated high efficiency, lightweight capacitor-diode multiplier DC to DC converter There is disclosed a voltage multiplier having a capacitor-diode voltage multiplying network which is fed with voltage pulses from a d-c source through a first switching means. Pulses of a second polarity are also supplied through a second switching means... | 05/30/1978 |
| 4079445 | Device for voltage regulation of a solar generator A device for the voltage regulation of a solar-type generator by the additive or subtractive connection of generator units to a common bus bar. A logic circuit controls the number of unregulated generator units being connected to the bus bar at any one ti... | 03/14/1978 |
| 4047235 | Current limit and overcurrent cut off system In a power conversion system wherein AC input current is supplied through contacts of a circuit breaker and phase controlled rectifiers, a control derives a DC signal, Io, proportional to the square of the RMS value of actual current. The summa... | 09/06/1977 |
| 3956687 | Staggered stage shunt regulator A regulator which shunts excess current from a solar cell array in which zener diodes of different values are used to separate the control signal into divisions. The control signal, now divided, is used to separate array current into divisions. Each of th... | 05/11/1976 |
