ROAD VEHICLE ELECTRICAL SYSTEM WITH TRANSDUCERS DETECTING FAULTS AND PRODUCING UNIQUE OUTPUTS OPERATING A RECEIVING AND DISPLAY UNIT

• US 3,665,384 A
• Filed: 08/25/1970
• Issued: 05/23/1972
• Est. Priority Date: 08/26/1969
• Status: Expired due to Term

• Current Assignee: Andrew Peter Ives
• Original Assignee: Andrew Peter Ives
• Inventors: Ives, Andrew Peter
• Primary Examiner(s): Caldwell, John W.
• Assistant Examiner(s): Swann, III, Glen R.
• Application Number:
  US05/066,699
• Time in Patent Office: 637 Days
• Field of Search: 340/52F,52R,66,414,412,420 180/103 307/1R,99,130,116 315/136,315,133,132,77
• US Class Current: 340/459
• CPC Class Codes: G07C 5/0816 Indicating performance data, e.g. occurrence of a malfunction
• CPC Class Codes: G08B 23/00 Alarms responsive to unspecified undesired or abnormal conditions

Abstract

A fault detecting system for a road vehicle includes a plurality of fault transducers, each producing its own unique output in the event of a fault. The receiving and display unit is operable by these unique outputs for indicating each fault, and a single cable is used to connect all the transducers to the receiving and display unit.

Claims

1. A fault detecting system for a road vehicle, comprising a plurality of fault transducers each producing in the event of a fault an output in the form of a voltage level, each of said transducers producing a different voltage level, so that the output produced by each transducer is unique, a receiving and display unit operable by said unique output for indicating each fault, and a single cable connecting all the transducers to the receiving and display unit.

2. A system as claimed in claim 1 in which the receiving and display unit includes a plurality of voltage-sensitive switching circuits, each of which is sensitive to a small voltage range so that only one of the switching circuits is operated by a given voltage on said single cable.

3. A system as claimed in claim 1 in which the receiving and display unit includes a plurality of switching circuits each of which requires a minimum voltage to cause it to operate, so that a given voltage level corresponding to a given fault operates its own switching circuit, but is also capable of operating the switching circuits which can be operated by lower voltage levels, the switching circuits being interconnected so that for a given voltage level, operation of the switching circuit which can be operated by lower voltage levels is prevented.