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Vehicle fuel economy energy conservation indicating device and process for use

  • US 4,247,757 A
  • Filed: 05/22/1978
  • Issued: 01/27/1981
  • Est. Priority Date: 05/22/1978
  • Status: Expired due to Term
First Claim
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1. A vehicle fuel economy and energy conservation indicating device comprising in combination a first and second concentrically disposed generally parallel positioned cooperable computing elements rotating about a common axis, a third computing element operatively connected to each of said first and second computing elements, said operative connections providing generally oppositely disposed pivotal means between said first and second computing elements and said third computing element, said operative connections providing independent translative movement to said oppositely disposed pivotal means, calibrated graphic display scales embodied on the face surface of said device, said face surface juxtapositioned parallel to said computing elements, registering means provided on said face surface adjacent to said scales thereby allowing simultaneous viewing of said elements with said scales, the consequential operation of said first and second computing element together with said third computing element relate to said calibrated scales according to a mathematical relationship for vehicle fuel economy thereby indicating the average miles per gallon at any related total trip distance and total fuel consumed setting.

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