Data processing: measuring – calibrating – or testing – Measurement system – Speed
Reexamination Certificate
1998-11-27
2001-07-10
Shah, Kamini (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
Speed
C324S160000
Reexamination Certificate
active
06259998
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to engine monitoring devices, and more particularly to adaptable engine monitoring devices.
SUMMARY OF THE INVENTION
Engine monitoring is used throughout many industries to determine performance of an engine as well as to determine when servicing of an engine is needed. For example, the automotive industry examines such engine characteristics as the revolutions per minute of an engine over a period of time in order to assess the engine's performance and to determine when the engine might need servicing.
Industries use many different engine configurations that can range from one to eight cylinders and from two to four strokes. However, present engine monitoring devices are not adaptable for accurately monitoring these different configurations since they are specifically designed to monitor only one or two engine configurations.
Accordingly, it is a feature of the present invention to provide an engine tachometer device that is adaptable to all configurations of engines. It is another feature of the present invention to provide a device in a self-contained case that can accurately monitor all configurations of engines. It is yet another feature of the present invention to provide engine servicing indications based upon the monitored engine.
In accordance with one aspect of the present invention, an engine tachometer device is provided for determining the revolutions per minute of an engine which generates sparks. An electrical power supply input which is connected to a power source external to the device supplies electrical power to the device from the external power source. An internal power source is disposed within the device for supplying electrical power to the device. A power switch which is connected to the electrical power supply and to the internal power source provides power to the device by switching between the electrical power supplied via the input and via the internal power source. Another embodiment of the present invention includes the internal power source being a replaceable battery and containing components which protect the battery from at least one environmental characteristic of the environment that is external to the battery.
Additional objects and advantages of the present invention will be apparent from the detailed description of the preferred embodiment, the appended claims in the accompanying drawings, or may be learned by practice of the invention.
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Harness & Dickey & Pierce P.L.C.
Raymond Edward
Shah Kamini
LandOfFree
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