Unified brake and light tester
First Claim
1. A tester for performing safety checks on a vehicle having illumination and signal lighting circuits, the tester comprising:
- electrical circuitry connectable to and selectively energizing both audible and illumination annunciator signalling lighting circuits of corresponding annunciators;
said electrical circuitry having sub-circuits, each serving a selected illumination and signalling lighting circuit;
each said sub-circuit having a switch for selectively controlling its respective sub-circuit;
said annunciators including both a lamp and an audible signalling device responsive to successful energization of at least one of said sub-circuits;
a housing enclosing said electrical circuitry; and
a plurality of dissimilar modular wiring connectors each having a plurality of conductors, each individual conductor corresponding to one illumination and signalling function, individual conductors for each like illumination and signalling function of each said modular wiring connector being connected in parallel by said electrical circuitry to a predetermined said sub-circuit, whereby like functions are energized and tested having different modular wiring connectors by a designated one of said sub-circuits,said at least one of said sub-circuits includes an elongate length of flexible pigtail connectors for electrical continuity testing remote from said housing and has an associated said lamp and said audible signalling device cooperating therewith.
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Accused Products
Abstract
A portable diagnostic device for checking electrical signalling systems of for example tractors and their trailers. The device has several receptacles for connection to a corresponding receptacle or pin connector of a trailer. One electrical circuit includes switches for energizing individual signalling or other circuits of the trailer individually, and indicating lamps and/or horns for annunciating circuit operability. Another electrical circuit includes switches for energizing individual signalling or illumination circuits individually, and indicating lamps and/or horns for annunciating circuit operability. The device, which is contained on a wheeled stand, has its own power supply and circuit overcurrent protective devices, and is thus independent.
24 Citations
8 Claims
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1. A tester for performing safety checks on a vehicle having illumination and signal lighting circuits, the tester comprising:
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electrical circuitry connectable to and selectively energizing both audible and illumination annunciator signalling lighting circuits of corresponding annunciators; said electrical circuitry having sub-circuits, each serving a selected illumination and signalling lighting circuit; each said sub-circuit having a switch for selectively controlling its respective sub-circuit; said annunciators including both a lamp and an audible signalling device responsive to successful energization of at least one of said sub-circuits; a housing enclosing said electrical circuitry; and
a plurality of dissimilar modular wiring connectors each having a plurality of conductors, each individual conductor corresponding to one illumination and signalling function, individual conductors for each like illumination and signalling function of each said modular wiring connector being connected in parallel by said electrical circuitry to a predetermined said sub-circuit, whereby like functions are energized and tested having different modular wiring connectors by a designated one of said sub-circuits,said at least one of said sub-circuits includes an elongate length of flexible pigtail connectors for electrical continuity testing remote from said housing and has an associated said lamp and said audible signalling device cooperating therewith. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification