| |
 |
|
Class Information
Number: 315/219
Name: Electric lamp and discharge devices: systems > Periodic switch in the supply circuit > Periodic switch in the primary circuit of the supply transformer
Description: Systems provided with a transformer connected between the source of supply and the load device for supplying electric current or potential to the load device and having the periodic switch connected in the primary circuit of the transformer so as to periodically interrupt the primary circuit.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5341068 |
Electronic ballast arrangement for a compact fluorescent lamp |
Aug. 23, 1994 |
| 5336976 |
Illumination warm-up control in a document scanner |
Aug. 9, 1994 |
| 5332951 |
Circuit for driving gas discharge lamps having protection against diode operation of the lamps |
Jul. 26, 1994 |
| 5331253 |
Electronic ballast for gaseous discharge lamp operation |
Jul. 19, 1994 |
| 5329209 |
Self-oscillating circuit for driving a gas discharge lamp, particularly for use on board a motor vehicle |
Jul. 12, 1994 |
| 5323090 |
Lighting system with variable control current sensing ballast |
Jun. 21, 1994 |
| 5321337 |
Ballast having starting current restraint circuitry for preventing a large in-rush current and protection circuitry for preventing damage due to a start-up failure |
Jun. 14, 1994 |
| 5315215 |
High-voltage switching circuit |
May. 24, 1994 |
| 5302083 |
Ceiling fan with neon light |
Apr. 12, 1994 |
| 5298836 |
Power supply circuit for gas discharge lamps operating at a resonant frequency |
Mar. 29, 1994 |
| 5294868 |
Dual lamp electronic ballast with independent control means |
Mar. 15, 1994 |
| 5293098 |
Power supply for electroluminescent lamps |
Mar. 8, 1994 |
| 5291100 |
Low watt metal halide lamp apparatus |
Mar. 1, 1994 |
| 5291101 |
Electronic ballast for a discharge lamp with current sensing |
Mar. 1, 1994 |
| 5287040 |
Variable control, current sensing ballast |
Feb. 15, 1994 |
| 5282120 |
Converter for providing boost voltage for a flash discharge lamp serving as a photographic light |
Jan. 25, 1994 |
| 5266869 |
Discharge lamp lighting apparatus having output impedance which limits current flow therethrough after start of discharging |
Nov. 30, 1993 |
| 5262699 |
Starting and operating circuit for arc discharge lamp |
Nov. 16, 1993 |
| 5252891 |
Uninterruptible fluorescent lamp circuit available for emergency lighting |
Oct. 12, 1993 |
| 5237243 |
Dimming circuit for a fluorescent lamp |
Aug. 17, 1993 |
| 5235254 |
Fluorescent lamp supply circuit |
Aug. 10, 1993 |
| 5231333 |
Switching excitation supply for gas discharge tubes having means for eliminating the bubble effect |
Jul. 27, 1993 |
| 5229927 |
Self-symmetrizing and self-oscillating half-bridge power inverter |
Jul. 20, 1993 |
| 5214355 |
Instant-start electronic ballast |
May. 25, 1993 |
| 5208515 |
Protection circuit for stabilizer for discharge apparatus |
May. 4, 1993 |
| 5192897 |
Electronic high frequency controlled device for operating gas discharge lamps |
Mar. 9, 1993 |
| 5192896 |
Variable chopped input dimmable electronic ballast |
Mar. 9, 1993 |
| 5191262 |
Extra cost-effective electronic ballast |
Mar. 2, 1993 |
| 5191263 |
Ballast circuit utilizing a boost to heat lamp filaments and to strike the lamps |
Mar. 2, 1993 |
| 5189343 |
High frequency luminous tube power supply having neon-bubble and mercury-migration suppression |
Feb. 23, 1993 |
| 5185560 |
Electronic fluorescent lamp ballast |
Feb. 9, 1993 |
| 5175474 |
Power source for lighting apparatus |
Dec. 29, 1992 |
| 5173643 |
Circuit for dimming compact fluorescent lamps |
Dec. 22, 1992 |
| 5172034 |
Wide range dimmable fluorescent lamp ballast system |
Dec. 15, 1992 |
| 5170099 |
Discharge lamp lighting device |
Dec. 8, 1992 |
| 5166579 |
Discharge lamp operating circuit |
Nov. 24, 1992 |
| 5162703 |
Flashing light warning apparatus |
Nov. 10, 1992 |
| 5155415 |
High voltage driver for gas discharge lamps |
Oct. 13, 1992 |
| 5144195 |
Circuit for driving at least one gas discharge lamp |
Sep. 1, 1992 |
| 5144204 |
Tapped-inductor boost convertor for operating a gas discharge lamp |
Sep. 1, 1992 |
| 5142202 |
Starting and operating circuit for arc discharge lamp |
Aug. 25, 1992 |
| 5140229 |
Lighting circuit for vehicular discharge lamp |
Aug. 18, 1992 |
| 5140224 |
Apparatus for operating discharge lamp |
Aug. 18, 1992 |
| 5138235 |
Starting and operating circuit for arc discharge lamp |
Aug. 11, 1992 |
| 5134344 |
Ballast circuits for gas discharge lamps |
Jul. 28, 1992 |
| 5130608 |
Electrical module and method for reducing power consumption of an incandescent light bulb |
Jul. 14, 1992 |
| 5130609 |
Illuminating device incorporating gas-filled chambers |
Jul. 14, 1992 |
| 5130610 |
Discharge lamp lighting apparatus |
Jul. 14, 1992 |
| 5130611 |
Universal electronic ballast system |
Jul. 14, 1992 |
| 5126637 |
Luminous power supply with improved transformer means |
Jun. 30, 1992 |
|
|
|
