초록 ▼

The pedestrian traffic control system of this invention utilizes an endless belt to successively display visible painted WALK, DONT START, and DONT WALK signs in a window of a display unit. The control unit may be employed with an ordinary three-state power system of the type that now operates flash

The pedestrian traffic control system of this invention utilizes an endless belt to successively display visible painted WALK, DONT START, and DONT WALK signs in a window of a display unit. The control unit may be employed with an ordinary three-state power system of the type that now operates flashing neon signs, but has the advantage that electric power operates the signs only when a sign is being moved into display position. Three distinct WALK, DONT START, and DONT WALK signs are used thereby avoiding the ambiguity of present systems in which a flashing DONT WALK sign cautions the pedestrian not to start, but to continue on his way. The movement of the endless belt is controlled by detecting markers, such as perforations, on the endless belt, thus assuring proper registration of the signs in display position. Electrical energy that becomes stored while the sign is energized drives the sign to display the DONT WALK sign, if the power fails. The invention may be applied to other types of endless signs and with other types of control means that move synchronously with the endless sign.

대표청구항 ▼

A pedestrian traffic signal for displaying a traffic sign in a display position comprising: an endless sign with indicia thereon; support means to support the endless sign to place at least one of the indicia in the display position; motion means connected to the endless sign and to a power supply t

A pedestrian traffic signal for displaying a traffic sign in a display position comprising: an endless sign with indicia thereon; support means to support the endless sign to place at least one of the indicia in the display position; motion means connected to the endless sign and to a power supply to move the endless sign past the display position; position detection means to detect the position of the indicia with respect to the display position; and control means responsive to the position detection means to control the motion means to place a desired indicia on the endless sign in the display position, the control means including a fail-safe means to detect failure of the power supply and in response thereto place a previously selected indicia in the display position.