Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Patent
1982-08-09
1984-02-14
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Transformer in the supply circuit
315141, 315288, 315291, 315362, 315DIG4, 323345, H05B 4138
Patent
active
044319487
ABSTRACT:
An apparatus for reducing the voltage applied to a load in an AC system utilizes an autotransformer and a relay or equivalent switching device between the common winding and the series winding. In each of the AC lines, the common winding and relay are connected between the load and the AC common while the series winding is connected between the input and the output. The relay is normally open to pass substantially full input voltage to the load, but when closed the relay permits current flow in the common winding to reduce voltage to the load. The relay or equivalent switching is therefore not in the direct flow of load current and can be of lower current rating and smaller size and cost as compared to prior art voltage reduction systems.
REFERENCES:
patent: 3014173 (1961-12-01), Martin et al.
patent: 4134043 (1979-01-01), Nuver
patent: 4189664 (1980-02-01), Hirschfeld
patent: 4390814 (1983-06-01), Peek
Donnelly Albert J.
Elder Delbert E.
Forder Gerald F.
LaRoche Eugene R.
Standun Controls, Inc.
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