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Class Information
Number: 388/933
Name: Electricity: motor control systems > Specific feedback condition or device > Radiant energy responsive device
Description: Art collection of systems wherein a feedback signal is generated by a device which is sensitive to radiant energy.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7180256 |
Electronically controlled power steering system for vehicles and method and system for motor control |
Feb. 20, 2007 |
| 6864650 |
Winch controller |
Mar. 8, 2005 |
| 6369530 |
Battery-powered wireless remote-control motorized window covering assembly having controller components |
Apr. 9, 2002 |
| 6259218 |
Battery-powered wireless remote-control motorized window covering assembly having a microprocessor controller |
Jul. 10, 2001 |
| 5892338 |
Radio frequency remote control for trolling motors |
Apr. 6, 1999 |
| 5779817 |
Circuit arrangement of solar cells |
Jul. 14, 1998 |
| 5629590 |
Rotational drive control device for variable speed drive motor |
May. 13, 1997 |
| 5457373 |
Electric motor with integrally packaged day/night controller |
Oct. 10, 1995 |
| 5272426 |
Control loop for motorized shutter operation |
Dec. 21, 1993 |
| 5233277 |
Apparatus for controlling the operation of electric motors in sewing machines |
Aug. 3, 1993 |
| 5134347 |
Low power consumption wireless data transmission and control system |
Jul. 28, 1992 |
| 5081402 |
Low power consumption wireless data transmission and control system |
Jan. 14, 1992 |
| 5077823 |
Electric motor starting circuit |
Dec. 31, 1991 |
| 4947099 |
Motor controller with optical SCR's |
Aug. 7, 1990 |
| 4910789 |
Apparatus for controlling the adjustment rate of a lens assembly |
Mar. 20, 1990 |
| 4862048 |
Speed control system |
Aug. 29, 1989 |
| 4859918 |
Method and apparatus for producing a speed control voltage for direct current motors in typewriters or similar office machines |
Aug. 22, 1989 |
| 4857811 |
Evacuation pump control for a centrifuge instrument |
Aug. 15, 1989 |
| 4847555 |
Device for detecting rotational speed of a motor using first and second sensors and a switching unit to select between the two sensors |
Jul. 11, 1989 |
| 4845608 |
Digital speed controller using a single-chip microcontroller |
Jul. 4, 1989 |
| 4837486 |
DC motor speed stabilizing method and apparatus |
Jun. 6, 1989 |
| 4831313 |
Two speed motor controller |
May. 16, 1989 |
| 4827197 |
Method and apparatus for overspeed protection for high speed centrifuges |
May. 2, 1989 |
| 4827202 |
Method of and circuitry for automatically adjusting the variable-gain amplification in a control loop |
May. 2, 1989 |
| 4823055 |
Electronic control circuit for command systems |
Apr. 18, 1989 |
| 4780654 |
Control apparatus for drilling machine |
Oct. 25, 1988 |
| 4763054 |
Level detector |
Aug. 9, 1988 |
| 4755730 |
Variable resistance output motor controller |
Jul. 5, 1988 |
| 4728869 |
Pulsewidth modulated pressure control system for chemical vapor deposition apparatus |
Mar. 1, 1988 |
| 4701685 |
Controlling a d.c. motor |
Oct. 20, 1987 |
| 4698567 |
Ribbon deck motor control |
Oct. 6, 1987 |
| 4672396 |
Hard copy recorder paper speed control |
Jun. 9, 1987 |
| 4639649 |
Motor control device |
Jan. 27, 1987 |
| 4629980 |
Testing limits of speed variations in motors |
Dec. 16, 1986 |
| 4630210 |
Microprocessor controlled d.c. motor for controlling a load |
Dec. 16, 1986 |
| 4625156 |
Control device |
Nov. 25, 1986 |
| 4567414 |
Method and a device for controlling a brush-commutator assembly of an electric machine |
Jan. 28, 1986 |
| 4551715 |
Tachometer and rotor identification apparatus for centrifuges |
Nov. 5, 1985 |
| 4507110 |
Adjustable photosensor mounting arrangement for a centrifuge |
Mar. 26, 1985 |
| 4463294 |
Windshield wiper control apparatus |
Jul. 31, 1984 |
| 4456859 |
Sewing machine drive motor control system |
Jun. 26, 1984 |
| 4454573 |
Current regulator circuit |
Jun. 12, 1984 |
| 4450391 |
Centrifuge protective circuits for preventing excessive speed of different rotor types |
May. 22, 1984 |
| 4399393 |
Accelerator control for electric vehicles |
Aug. 16, 1983 |
| 4391362 |
Speed controlled infeed conveyor system |
Jul. 5, 1983 |
| 4390825 |
Auto-threshold slow start control circuit for a centrifuge |
Jun. 28, 1983 |
| 4384825 |
Personal sampling pump |
May. 24, 1983 |
| 4379255 |
Controller with at least one switch actuatable within a predetermined range of motion, in combination with a set point selector |
Apr. 5, 1983 |
| 4370677 |
Rotating shutter system for improving the resolution of a visual display system |
Jan. 25, 1983 |
| 4354146 |
Drive apparatus |
Oct. 12, 1982 |
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