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US 4,542,709 AGranted
Highway warning device
OwnerRandall E. Spaughinventor
Life of this patent
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Abstract
A warning device adapted to be laid flat upon a roadway produces an audible warning sound when contacted by the wheels of a moving vehicle. The device is comprised of a mat of flexible resilient material having an elongated configuration, and a series of rigid panels upwardly positioned upon the mat. The warning sound is produced when the panels are downwardly deflected, and thereby contact each other in domino fashion. By virtue of its specialized construction, the device can be folded and rolled into a compact storage state which can be contained in the trunk of an automobile.
Claims2
An improved portable highway warning device comprising:
- (a) a mat having substantially flat upper and lower surfaces, fabricated of a flexible resilient composition and having an elongated rectangular periphery characterized in having a long length direction and shorter width direction, and
- (b) a series of substantially rigid panels of uniform elongated rectangular periphery characterized in having a long length direction and shorter height direction, said panels being attached in a parallel array to said mat, extending upwardly in their height direction from the upper surface of said mat, extending in their length direction in the length direction of said mat, and spaced apart in the width direction of said mat a uniform distance less than the height of said panels, whereby
- (c) when the device is placed with the lower surface of the mat resting upon a roadway surface and the length direction oriented transversely to the direction of vehicular travel, passage of the wheels of a vehicle across said array of panels causes momentary downward deflection of said panels, resulting in a domino-type contact therebetween which contact produces a discernible sound.
Dependencies are inferred from the claim text.