Electric circuit energizing lamps of a vehicle

Claim 1

An electric circuit for selectively energizing two groups of lamps symmetrically arranged on a vehicle adjacent the left and right sides thereof, respectively, comprising a brake switch operable by the brake of said vehicle, a direction indicator switch manually movable selectively into engagement with first and second contacts, respectively, selectively to supply power thereto from a power source, a transistor operative to be switched from a nonconductive to a conductive state, when said indicator switch is engaged with one of said contacts, a sequentially energizing circuit for cyclically and successively energizing the lamps of one of said groups, when said transistor is conducting, a first relay connected to one of said contacts of said direction indicator switch and having a first set of contacts for selectively connecting each of said groups of lamps to the corresponding stages of said sequentially energizing circuit, and having a further contact connected between said brake switch and one of said groups of lamps, a second relay connected to the other contact of said direction indicator switch and having a first set of contacts between said contacts of said direction indicator switch and said sequentially energizing circuit, and having a further contact connected between said brake switch and the other of said groups of lamps, and a group of hazard switches comprising a first switch connected between said power source and said second relay and adapted to connect said sequentially energizing circuit to said power source through one of said first set of contacts of said second relay, when said second relay is energized, a second switch connected between selected lamps of each group thereof and said sequentially energizing circuit, and further switches connected between the lamps other than said selected lamps and said sequentiAlly energizing circuit, said direction indicator switch being operable to actuate said transistor and selectively to energize one of said relays and resultantly to actuate said sequentially energizing circuit through one of said first set of contacts of said second relay to apply an output of each stage of said sequentially energizing circuit selectively to one of said groups of lamps through said first set of contacts of said first relay, thereby performing a sequential lighting of the lamps of the last-named group, said group of hazard switches being operable to energize said second relay by the operation of said one switch thereby to actuate said sequentially energizing circuit, and to disconnect said lamps other than said selected lamps from said sequentially energizing circuit by the operation of said further switches, and electrically to connect only said selected lamps to said sequentially energizing circuit by the operation of said second switch, thereby performing a flashing of the selected lamps only, and means responsive to the operation of said brake switch to light all the lamps through said further contacts of said relays, when the latter are not energized.