Control circuit for direction indicator lamps in vehicles with alternating current installations
AssigneeZanussi Elettromeccanica S.p.A.
InventorsFausto Bazzani, Paolo Sevini
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Abstract
A control circuit for direction indicator lamps of a vehicle includes an alternating voltage generator suitable for feeding the lamps through a manual commutator or switch and at least one bi-directional conduction controlled diode which is driven by an impulse generator. The latter is suitably driven by the alternating voltage of the generator to furnish an output signal of alternating impulses synchronized with the zero changeovers of the alternating voltage. The impulse generator is driven by a timing stage with a signal of alternating blocking and admitting impulses.
Claims12
A control circuit for use in controlling direction indicator lamps of a vehicle of the type including an alternating voltage generator for generating an alternating voltage, a switch means for selective manual connection to selected direction indicator lamps, and at least one bi-directional conduction controlled diode having a control electrode and positioned between said alternating voltage generator and said switch means to feed an alternating voltage to said direction indicator lamps selected by the switch means, said control circuit comprising:
- an impulse stage generator means, having an output connected to said control electrode of said diode and supplied with said alternating voltage from said alternating voltage generator, for producing an output signal of alternating current impulses which are synchronized with zero changeover points of said alternating voltage and for supplying said output signal to said control electrode;
- and
- a timing stage means, having an output connected to said impulse stage generator means, for generating a timing signal of alternating blocking and admitting impulses and for supplying said timing signal to said impulse stage generator means to control the operation thereof.
In a vehicle including direction indicator lamps, an alternating voltage generator for generating alternating voltage, a switch means for selective manual connection to selected direction indicator lamps, at least one bi-directional conduction controlled diode having a control electrode, said diode being positioned between said alternating voltage generator and said switch means to feed said alternating voltage to said direction indicator lamps selected by said switch means, and a control circuit for controlling the operation of said direction indicator lamps, the improvement wherein said control circuit comprises:
- an impulse stage generator means, having an output connected to said control electrode of said diode and supplied with said alternating voltage from said alternating voltage generator, for producing an output signal of alternating current impulses which are synchronized with zero changeover points of said alternating voltage and for supplying said output signal to said control electrode;
- and
- a timing stage means, having an output connected to said impulse stage generator means, for generating a timing signal of alternating vlocking and admitting impulses and for supplying said timing signal to said impulse stage generator means to control the operation thereof.
Dependencies are inferred from the claim text.