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US 3,938,074 AGranted
Fuel economy indicator
AssigneeBorg-Warner Corporation
InventorClarence D. Fox
Life of this patent
Estimating the term…
Abstract
A compact fuel economy indicator employs illuminated symbols such as colored lenses to indicate relative fuel economy. In one embodiment a series of lenses is moved with respect to a fixed lamp while in a second embodiment a lamp is moved with respect to the series of lenses for increasing the intensity of illumination of the appropriate lens.
Claims7
A fuel economy indicator device for use with an internal combustion engine having a fuel induction system,
- said device including a body having actuating means secured thereto, said actuating means being arranged for connection to said induction system and adapted for actuating movement in response to pressure changes in said induction system;
- luminous means;
- and spaced lucidly distinct symbols disposed adjacent said luminous means, each symbol representing a condition of relative fuel economy, said symbols and said luminous means being operatively connected to said body and said actuating means for relative movement in response to actuating movement of said actuating means,
- whereby respective of said spaced symbols receive varying intensity of illumination responsive to changes in induction system pressure, automatically providing a distinct indication of relative fuel economy during engine operation.
1 more element
Dependencies are inferred from the claim text.