The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2006
Filed:
Aug. 05, 2004
Leslie A. Beckwith, La Mirada, CA (US);
Randy V. Cruz, La Habra, CA (US);
Leslie A. Beckwith, La Mirada, CA (US);
Randy V. Cruz, La Habra, CA (US);
Polara Engineering, Inc., Fullerton, CA (US);
Abstract
A 2-wire control system which communicates with a plurality of pole mounted push button stations of the kind that are found at a traffic light controlled intersection via existing pairs of underground wires over which power and data signals are transmitted so as to enable a visually impaired pedestrian to receive both audible and tactile signals regarding the flow of vehicular traffic through the intersection. The 2-wire control system includes a central control unit that is located at a traffic light control cabinet and is connected to a standard traffic signal light controller. The control unit includes a plurality of 2-wire output ports that are connected to respective pairs of the plurality of push button stations. The central control unit also includes a corresponding plurality of on/off controls and data interfaces by which each of the 2-wire output ports thereof is provided with the power and data signals to be transmitted to respective pairs of push button stations depending upon the entry of a pedestrian request and the illumination of a WALK or DON'T WALK message.