|
PatentVote.com: Vote on your favourite invention!
|
|
 |
Title: Dual battery ignition and start system for a vehicle
Claims: I claim: 1. An electrical circuit arrangement for a vehicle which permits the starting voltage and/or the ignition voltage for the vehicle engine to be derived from the vehicle battery or from an attached camper battery comprising in combination: a vehicle battery having one terminal connected to ground; a vehicle starter relay a starter motor having one terminal connected to ground and its other terminal connected via the controlled current path of said vehicle starter relay to the other terminal of said battery; a conventional vehicle ignition switch having a battery voltage input terminal and at least an ignition voltage output terminal which is connected to the ignition coil, and a starter control voltage output terminal; a first switch connecting said starter control voltage output terminal of said ignition switch to the control terminal of said vehicle starter relay; a camper battery having one terminal connected to ground; circuit means, including the controlled current path of a further starter relay, for connecting the other terminal of said camper battery to said other terminal of said starter motor; a second switch connecting said starter control voltage terminal of said ignition switch to the control terminal of said further starter relay; and a single pole double throw switch means, having its movable contact connected to said battery voltage input terminal of said ignition switch, for selectively connecting said battery voltage input terminal to said other terminal of said vehicle battery or said other terminal of said camper battery, whereby the position of said switch means determines which of the battery supplies the voltage for the vehicle motor ignition coil and for control of said starter relays and the closure of one or both of said first and second switches determines which one or both of the batteries supplies the starter voltage. 2. A circuit arrangement as defined in claim 1 wherein said ignition switch further includes an accessory voltage output terminal which is momentarily disconnected from said ignition switch battery voltage input terminal when said ignition switch is switched to its start position; and further comprising: a vehicle alternator, first circuit means for connecting the output of said alternator to said other terminal of said vehicle battery; and second circuit means for connecting said output of said alternator to said other terminal of said camper battery, said second circuit means including relay means having its control input connected to said accessory voltage output terminal of said ignition switch and responsive to the voltage thereof, for interrupting said second circuit means when no output voltage appears at said accessory voltage output terminal of said ignition switch. 3. A circuit arrangement as defined in claim 2 further comprising: a pair of terminals by means of which jumper cables can be connected to a further battery, one of said pair of terminals being connected to ground; a jumper relay having its controlled current path connected between the other of said pair of terminals and said other terminal of said starter motor via the controlled current path of said further starter relay; and a normally open switch connected between the control input of said jumper relay and said other terminal of said camper battery. Other info: Inventors: Day, Oliver E. Application Number: 491959 Filing Date: 1974-07-25 Publication_date: 1976-04-06 Assignee: Primary Class(es): 320/117 307/10.7, 307/66, 320/127, 320/DIG34 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Miller, J. D. Assistant Examiner: Hickey, Robert J. Attorney: Spencer & Kaye |
|