| Patent Number |
Title Of Patent |
Date Issued |
| RE29048 |
AC and DC regulator circuit |
November 23, 1976 |
| A circuit for providing a regulated square wave output voltage and a regulated DC output voltage or both. An AC source energizes a switching circuit, having a variable switching rate, which connects a capacitor in voltage clamping relationship to an AC load for both half cycles of the AC |
| 6493243 |
Redundant power system and power supply therefor |
December 10, 2002 |
| A redundant power system includes plural load-sharing power supplies connected to a common AC output bus. Identical circuitry is provided in each supply to control the redundant operation and is connected to each of the others via a common redundancy bus. An arbitration circuit in each |
| 6359794 |
Battery backup power supply |
March 19, 2002 |
| An uninterruptible power supply includes an inverter provided with power from a utility and a battery. The battery is connected through a FET so that battery power is instantly supplied to the inverter through the intrinsic FET diode when the utility power fails. The battery discharge |
| 5757172 |
Temperature and current dependent regulated voltage source |
May 26, 1998 |
| A linear voltage regulator is operated by a temperature sensor and a current sensor. The temperature sensor is a thermistor in a voltage divider connected across the output of the regulator. The current sensor operates a voltage follower connected to adjust the voltage in the voltage |
| 5703558 |
Combined terminal block mount and lamination stack keeper |
December 30, 1997 |
| A combined terminal block mount and lamination stack keeper has a metal keeper with a flat first portion of a size and shape to lie contiguous to and oriented with a stack of laminations. A part of the stack of laminations is adapted to receive an inductance coil, and the coil is adj |
| 5588880 |
Terminal block |
December 31, 1996 |
| A finger-safe terminal block has an insulator base with two separate rotatable screws in screw apertures leading to first and second clamp areas. First and second conductor apertures also lead to these clamp areas. A tool access end accessible from the exterior of the base is provide |
| 5569554 |
Sealed rechargeable battery with stabilizer |
October 29, 1996 |
| A voltage regulator for a sealed rechargeable storage battery containing one or more rechargeable working cells and at least one regulator cell. The regulator cells are capable of consuming gas in a gas space within the sealed battery during charging of the working cells. The regulator c |
| 5488554 |
Low-loss clamp circuit |
January 30, 1996 |
| A low loss clamp circuit is provided for a dc to dc converter. The converter has a transformer with a secondary winding and a secondary circuit and a center tap primary winding. A dc voltage input is supplied to the primary winding center tap and to a circuit ground. A rectifier such |
| 5290640 |
Sealed rechargeable battery |
March 1, 1994 |
| A sealed rechargeable storage battery containing one or more rechargeable working cells and at least one regulator cell. The working cells are capable of generating gas in a gas space within the sealed battery during charging of the working cells. The regulator cell is in gaseous com |
| 5273845 |
Terminal structure and seal |
December 28, 1993 |
| A terminal structure and seal for an electrochemical cell includes a terminal post inside a plastic tubular member which is inside a metal barrel. The plastic tubular member is unitary with the plastic cover and a reinforcing boss on the cover is annular and an annular stabilizing flange |
| 5158842 |
Battery terminal connector |
October 27, 1992 |
| A battery terminal connector provides similar connector assemblies for electrodes of similar polarity. Each connector includes a U-shaped collector plate providing spaced and parallel flanges extending to spaced and parallel edges. U-shaped tabs are mounted on each electrode and prov |
| 5072167 |
Autopolarity battery charger |
December 10, 1991 |
| Two SCR full-wave center-tapped rectifiers are connected in opposite polarity to battery charging terminals. The proper polarity rectifier is selected by a battery polarity sensing circuit that enables the firing of the SCRs of the proper rectifier. The sensing circuit has two transistor |
| 4914396 |
PWM waveform generator |
April 3, 1990 |
| A PWM waveform generator generates the digitized waveform which may control an inverter so that the inverter output is pulse width modulated and generates a sine wave after filtering. A frequency controlling means includes a cycle clock cycling an address counter which addresses step |
| 4799130 |
Dielectric strength tester |
January 17, 1989 |
| A dielectric strength tester is disclosed for use with high-voltage, high-volt amperage electrical equipment. The step-up transformer has a high-voltage secondary winding which is connected through first and second primary windings of a sensing transformer to first and second test te |
| 4742290 |
Recharging battery charger |
May 3, 1988 |
| A microprocessor controlled battery charger to charge a battery when the charging current is reduced to zero even though the charger is still connected to the battery. The microprocessor includes a means to read the voltage of the battery and also includes a timer. The voltage of the |
| 4735713 |
Lamination dispenser |
April 5, 1988 |
| A dispenser is provided to dispense laminations to a forward position whereat they may readily be manually grasped for withdrawal from a dispenser and insertion into a preformed coil. One or more laminations may be dispensed in a selected group of laminations so that this entire sele |
| 4710694 |
Microprocessor controlled battery charger |
December 1, 1987 |
| 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 and establishes a decreasing step |
| 4682262 |
Battery charger spark suppressor |
July 21, 1987 |
| A spark suppression circuit for a battery charger includes a large filter capacitor connected in series with a semiconductor switch across the terminals of the battery charger. The battery charger does not have any output voltage even though the input is energized because the circuit |
| 4383293 |
Isolated DC current sense circuit |
May 10, 1983 |
| An inverter circuit is disclosed in which the alternating current output is rectified to become a DC power supply with a regulated output voltage. The inverter is controlled to limit the peak current conducted by the power semiconductors and a current limit circuit is provided to limit t |
