| Patent Number |
Title Of Patent |
Date Issued |
| 4971752 |
Safety design for nuclear power plants |
November 20, 1990 |
| A nuclear power plant installation comprises a nuclear reactor that is disposed in an underground reactor room and connected to power generating equipment on the ground surface by pipes which pass between the underground reactor room and the ground surface. A plurality of underground |
| 4910450 |
Low cost three phase energy economizer |
March 20, 1990 |
| An energy economizing AC power control system for energizing the stator windings of a three phase induction motor comprises an AC generator connected to the motor rotor shaft for generating an AC signal that is frequency modulated in response to load induced speed variations of the r |
| 4864212 |
Energy economizing AC power system |
September 5, 1989 |
| An energy economizing AC power control system for energizing an induction motor comprises a sine wave power source which is connected via a triac to the motor, and a control circuit which controls the conduction of the triac as a function of the load on the motor to provide the motor wit |
| 4341984 |
Electronic commutation for direct current electric motors |
July 27, 1982 |
| A Direct Current electric motor comprises a stator consisting of a plurality of coils interconnected to one another, and a plurality of gate controlled solid state rectifiers responsive to forced commutation below a particular rpm and self-commutation above said rpm which are connected t |
| 4307706 |
Flat plate solar boilers |
December 29, 1981 |
| A flat plate solar boiler, having one face which is exposed to solar radiation to heat a liquid within the boiler, also has its opposing face, or the dark side of the boiler, indirectly heated by solar radiation thereby to minimize heat losses from the boiler and to apply further input |
| 4190793 |
Energy economizer for induction motors |
February 26, 1980 |
| A standard, unmodified AC induction motor has its stator winding energized from a sine wave power source through a signal-responsive wave modifier operative to control the portion of each cycle of the swine wave which is coupled from said source to the stator winding. Load detecting mean |
| 4176307 |
Energy economizing AC power control system |
November 27, 1979 |
| An induction motor has its stator winding energized from a sine wave power source through a signal-responsive wave modifier operative to control the portion of each cycle of the sine wave which is coupled from said source to the stator winding. The induction motor includes a squirrel cag |
| 4095148 |
Direct current motors |
June 13, 1978 |
| A direct current motor comprises a stator having a plurality of coils connected in series with one another located around a circle in a closed loop configuration, with the junctions between adjacent pairs of coils being in turn connected to diametrically opposed ones of said junctions in |
| 4076025 |
Solar steam boiler |
February 28, 1978 |
| A solar heater comprising two or more containers nested one within the other for the solar heating of a gaseous medium such as air therein. Each container is provided, near its lower end, with a solar radiation absorbing metal sheet which, when it becomes hot, raises the temperature |
| 4019104 |
Variable speed induction motor |
April 19, 1977 |
| A polyphase motor of the wound rotor type has the rotor of a polyphase generator, smaller in size than said motor, mounted on the motor shaft. Polyphase voltages produced across the generator rotor are coupled to the input of an amplifier having an output power commensurate with the size |
