Class Information
Number: 315/293
Name: Electric lamp and discharge devices: systems > Current and/or voltage regulation > Pre-selectable regulator systems
Description: Systems, wherein (1) the supply circuit of the load device includes at least two impedances, means being provided for selectively connecting either of the two impedances in the supply circuit of the load device, or (2) the regulator in the supply circuit of the load device is designed to have its impedance varied over a range of values, means being provided to preselect the value of the impedance to be connected in the circuit and means being provided to effect a transition from one of the impedance values and to stop such transition at the preselected impedance value.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4704563 |
Fluorescent lamp operating circuit |
Nov. 3, 1987 |
| 4656398 |
Lighting assembly |
Apr. 7, 1987 |
| 4649323 |
Microcomputer-controlled light switch |
Mar. 10, 1987 |
| 4396871 |
Arrangement for digital brightness control of lamps |
Aug. 2, 1983 |
| 4359670 |
Lamp intensity control apparatus comprising preset means |
Nov. 16, 1982 |
| 4317071 |
Computerized illumination system |
Feb. 23, 1982 |
| 4287468 |
Dimmer control system |
Sep. 1, 1981 |
| 4253048 |
Filament heating apparatus |
Feb. 24, 1981 |
| 4240011 |
Keyboard operated controller |
Dec. 16, 1980 |
| 4178535 |
Three-way brightness fluorescent lampholder fitting |
Dec. 11, 1979 |
| 4151515 |
Load control apparatus |
Apr. 24, 1979 |
| 4147961 |
Energy-conserving solid-state-controlled illumination system |
Apr. 3, 1979 |
| 4147962 |
Energy-conserving illumination system |
Apr. 3, 1979 |
| 4095139 |
Light control system |
Jun. 13, 1978 |
| 4071809 |
Apparatus for synthesizing of colors |
Jan. 31, 1978 |
| 4016451 |
High pressure discharge lamp dimming circuit utilizing variable duty-cycle photocoupler |
Apr. 5, 1977 |
| 3970893 |
Apparatus for controlling the intensity of lights |
Jul. 20, 1976 |
| 3968401 |
Apparatus for controlling the intensity of a light source |
Jul. 6, 1976 |
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