Back to results
US 5,493,292 AGranted
Traffic control system for construction zones and the like
OwnerBentley M. Fanslow, Charles E. Fanslowinventors
Life of this patent
Estimating the term…
Abstract
A traffic control signal particularly adapted for alternate one-way traffic situations such as are frequently encountered in highway construction zones whereby `STOP` AND "SLOW" sign panels can be alternately displayed with suitable control mechanism which produces a combination rotational and axial displacement of a signal panel whereby one traffic control message can be superimposed upon another for displaying either a "STOP" message or a "SLOW" for the vehicular traffic.
Claims4
A traffic control signal apparatus particularly adapted for use to control traffic through a one-way construction zone,
- said apparatus comprising a pair of matched flat helical panels having matching radial by-pass slots to produce helical offset radial edges and permit one panel to be rotated into and out of super-imposed position overlying the other, one of said panels being rotatable relative to the other and each panel having a different traffic control message displayed thereon,
- a rotatable shaft fixed to the rotatable panel and the shaft and panel being mounted for axial displacement,
- means for rotating the shaft and the panel fixed thereto,
- an axial thrust gear connected to said shaft and including a helical thrust gear element to project said shaft forward when rotated in one direction and rearward when rotated in another direction and,
- a control mechanism to control the relative rotational positioning of the panels.
2 more elements
Dependencies are inferred from the claim text.