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US 4,907,844 AGranted
Uncancelled turn signal indicator
OwnerRalph C. Whiteinventor
Life of this patent
Estimating the term…
Abstract
An uncancelled turn signal indicator senses both that the monitored vehicle has a speed in excess of a predetermined threshold, and that a turn signal indicator for the vehicle has been selected for more than a predetermined period of activation. Upon sensing coincidence of both conditions, audible and visual indicators are provided to the driver of the vehicle to alert the driver of this condition.
Claims6
An uncancelled turn signal indicator for use with a vehicle having at least one turn signal indicator, the uncancelled turn signal indicator comprising:
- speed sense means for providing a speed sense signal when said vehicle's speed at least equals a predetermined speed;
- turn signal indicator sense means for sensing activation and deactivation of said turn signal indicator;
- duration sense means responsive to said turn signal indicator sense means for providing an output signal when said turn signal indicator has been continuously activated for more than at least a predetermined period of activation;
- logic means responsive to said speed sense signal and said output signal for providing a trigger signal when both said speed sense signal and said output signal are present;
- and
- indicator means responsive to said trigger signal for providing an indication to a driver of said vehicle that said turn signal indicator has not been cancelled.
3 more elements
Dependencies are inferred from the claim text.