Flasher inductance circuit

Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Flashers

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Details

200144R, 315 77, 337273, 340 81R, B60Q 134

Patent

active

040925633

ABSTRACT:
Deterioration of the electrical contacts of variable load flashers provided for intermittently energizing vehicle signal lamps is inhibited by the provision of a coiled length of a current conductor having a suitable inductance value connecting the flasher contacts with at least one output terminal. In the case of a two-terminal flasher, the conductor extends to the single output terminal from a junction at the flasher contacts and in such a flasher for use in a signal lamp circuit having a relatively high current load, the coiled length is wound about a heat conductive core member connected to the single output terminal and has an inductance value of about 5.8 to 6 microhenrys. In two terminal flashers for use in signal lamp circuits having a lower current load, the coiled length may have an air core and an inductance value of about 2 to 2.2 microhenrys. In the case of a three-terminal flasher, the output conductor extends to one of the two output terminals, and this terminal is connectable with the other by means including normally open contacts of a load-sensitive relay the activating coil of which is constituted by the coiled length of the output conductor having an inductance value of about 5.8 to 6 microhenrys, thus inhibiting sparking and contact deterioration at both the relay contacts and the flasher contacts.

REFERENCES:
patent: 2992336 (1961-07-01), Curtner
patent: 3925757 (1975-12-01), Kimmelman

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