Combined speedometer and tachometer
First Claim
1. A combined tachometer and gear number indicator for a motor vehicle comprising a plurality of individual display means for separately representing engine speed and each gear number, and indicator means for simultaneously indicating both the engine speed and engaged gear number, wherein engine speed and each gear number are displayed on said individual separate display means, each said display means rotating independently of each of the other display means on an axis separate from and concentric with axes of each of the other display means, said indicator means simultaneously indicating, in a single viewing field, both the engine speed and engaged gear number.
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Abstract
A combined tachometer/gear number indicator, preferably in further combination with a speedometer, is described for use on a motor vehicle for synchronizing engine speeds and vehicle speeds to avoid clutch wear when changing gears. A plurality of coaxial transparent dials carry gear number, engine speed and vehicle speed indicia, and markers are provided for indicating data.
19 Citations
9 Claims
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1. A combined tachometer and gear number indicator for a motor vehicle comprising a plurality of individual display means for separately representing engine speed and each gear number, and indicator means for simultaneously indicating both the engine speed and engaged gear number, wherein engine speed and each gear number are displayed on said individual separate display means, each said display means rotating independently of each of the other display means on an axis separate from and concentric with axes of each of the other display means, said indicator means simultaneously indicating, in a single viewing field, both the engine speed and engaged gear number.
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2. A combined speedometer and tachometer for a motor vehicle comprising a plurality of individual display means for representing engine speed, gear number and vehicle speed in a single viewing field, comprising
a single first indicator means for simultaneously indicating both engine speed and engaged gear number, wherein engine speed and each individual gear number are displayed on said individual display means, each said display means rotating independently of each of the other said display means on an axis separate from and concentric with axes of each of the other display means, said single first indicator means simultaneously indicating to the viewer both the engine speed and engaged gear number, and second indicator means for indicating vehicle speed, wherein engine speed may be accurately synchronized with vehicle speed when changing to a different gear.
Specification