Direction indicating flasher device for vehicles with filament f

Details Direction indicating flasher device for vehicles with filament f Direction indicating flasher device for vehicles with filament f

1988-01-11

1990-03-20

Orsino, Joseph A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

307 108, 340438, 340642, B60Q 146

Patent

active

049104969

ABSTRACT:
A flasher device flashes a selected one of a plurality of groups of indicator lamps selected by a flasher starting switch. An intermittent voltage is supplied to the selected group of indicator lamps to cause the lamps to flash. A capacitor is operatively connected to the selected group of indicator lamps and the rate of change of the voltage across the capacitor is indicative of the resistance of the selected group of indicator lamps. The frequency of the intermittent voltage supplied to the indicator lamps to flash the lamps is varied in response to the rate of change of the voltage across the capacitor. As the rate of change of voltage across the capacitor varies in relationship to the resistance of the selected group of indicator lamps, the change in the frequency of the intermittent voltage supplied the indicator lamps and thus the flash rate of the indicator lamps is representative of the resistance of the group of lamps. Thus the flash rate indicates to the operator of the vehicle when a filament has been broken. An audible announcement of the automatic reset of the flasher may also be developed.

REFERENCES:
patent: 3806868 (1974-04-01), Portman
patent: 3973238 (1976-08-01), Kato et al.
patent: 4068216 (1978-01-01), Brouwer et al.
patent: 4105996 (1978-08-01), Shimizu
patent: 4173750 (1979-11-01), Riba
patent: 4550303 (1985-10-01), Steele
patent: 4660020 (1987-04-01), Miyamaru et al.
patent: 4668946 (1987-05-01), Volk et al.
patent: 4792701 (1988-12-01), Olon et al.

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