Stroboscopic beacons fed from a capacitive source

Details Stroboscopic beacons fed from a capacitive source Stroboscopic beacons fed from a capacitive source

1978-09-18

1980-11-11

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Condenser in shunt to the load device and the supply

307109, 315159, 315200A, 340 28, 340333, H05B 4134

Patent

active

042335469

ABSTRACT:
The present invention relates to a system for energizing flash-tubes of beacons by means of the capacitive energy extracted from an insulated section of the overhead wire of power transmission lines. The supply system comprises a circuit for transforming the AC capacitive energy from the overhead wire into DC voltage, the latter feeding at least one flash-tube and a regulation circuit shunted across the transforming circuit for controlling a DC voltage threshold value supplying the tubes. Such regulation is achieved by detecting the predetermined DC voltage threshold value across the lamp terminals and by switching to the earth any capacitive energy extracted from the overhead wire exceeding that threshold value. Moreover, a circuit delivers a pulse at predetermined time intervals to control the firing of each flash-tube when the latter is subjected to a DC voltage corresponding to the predetermined threshold value and regulated by shunt switching.

REFERENCES:
patent: 2891195 (1959-06-01), Smyth
patent: 3202963 (1965-08-01), Flynn et al.
patent: 3259762 (1966-07-01), Skuderna
patent: 3421027 (1969-01-01), Maynard et al.
patent: 3426263 (1969-02-01), Hennigan et al.
patent: 3430101 (1969-02-01), Biltz
patent: 3678371 (1972-07-01), Nuckolls
patent: 3749976 (1973-07-01), Colyn
patent: 3781690 (1973-12-01), Corson
patent: 3944909 (1976-03-01), Reymond
patent: 4037191 (1977-07-01), Deane et al.

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