Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Reexamination Certificate
1999-08-09
2001-06-05
Sherry, Michael J. (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
C340S638000
Reexamination Certificate
active
06243246
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to an electric circuit of motor vehicles, and more particularly to a device for warning the breakdown of the electric circuit of motor vehicles.
BACKGROUND OF THE INVENTION
The automotive circuit is generally not provided with a means for detecting and warning the possible failure of the circuit. As a result, when the circuit breakdown takes place, the circuit is checked by an automotive mechanic to locate the breakdown. Such a trouble-shooting is not only expensive but also time-consuming.
SUMMARY OF THE INVENTION
The primaly objective of the present invention is therefore to provide a device for detecting and warning an automotive circuit breakdown. The device comprising a housing and an apparatus for detecting and warning the automotive circuit breakdown. The apparatus is provided with a positive conductive piece, a negative conductive piece, a fuse connecting the positive conductive piece and the negative conductive piece, a light-emitting diode fastened with the bottom of the negative conductive piece, and a coiled spring fastened at one end thereof with the bottom of the positive conductive piece and at other end thereof with an elastic piece. As the electric current becomes too strong, the fuse melts, thus breaking the circuit. The current is then transmitted via the spring and the elastic piece to the light-emitting diode which emits light when voltage is applied.
The foregoing objective, features and functions of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 4499447 (1985-02-01), Greenberg
patent: 4772219 (1988-09-01), Falchetti
patent: 4815993 (1989-03-01), Falchetti
patent: 5311139 (1994-05-01), Fogal
patent: 5701118 (1997-12-01), Hull et al.
patent: 5841337 (1998-11-01), Douglass
patent: 5986558 (1999-11-01), Crawford et al.
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