Electric lamp and discharge devices: systems – Plural load device systems – Electric switch in the supply circuit
Patent
1985-03-18
1987-06-23
Scott, Samuel
Electric lamp and discharge devices: systems
Plural load device systems
Electric switch in the supply circuit
315DIG4, 340310R, 340310A, H05B 4138
Patent
active
046755799
ABSTRACT:
The AC power line to a street luminaire carries a 200 KHz carrier signal for operating a switching relay that connects a dimming reactor in series with the discharge lamp. A pick-off transformer has a primary winding connected in series with the ballasting means for the lamp, and a secondary winding connected to a carrier signal detector operating the switching relay. A capacitor connected across the primary has a value resonating the primary magnetizing reactance of the transformer at the carrier frequency. A resistor substantially higher in value than the characteristic impedance of the line but not several orders of magnitude higher, is preferably connected across the primary winding to serve as a terminating impedance.
REFERENCES:
patent: 2212721 (1940-08-01), Terroni
patent: 2300940 (1942-11-01), Lenehan
patent: 2924769 (1960-02-01), Harriman et al.
patent: 3924223 (1975-12-01), Whyte et al.
patent: 4523128 (1985-06-01), Stamm et al.
Hardy James H.
Owen Daniel V.
Willis Candler A.
General Electric Company
Jacob Fred
Kamen Noah
McMahon John P.
Schlamp Philip L.
LandOfFree
Coupling of carrier signal from power line does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Coupling of carrier signal from power line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coupling of carrier signal from power line will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-723672