Portable traffic control system

Claim 2

A portable traffic control system comprising a pair of portable signal-display units adapted to be placed for use at spaced-apart points, each of said units including a signal-display element observable from one side of the unit and placeable selectively in signaling and nonsignaling states and means enabling monitoring of the states of said element simultaneously from the opposite side of the unit, and signal-display actuating means including a portable remote control device operatively coupled to each of said signaldisplay elements of said units, said signal-display actuating means employing radio-frequency communication and comprising a radio-frequency receiver for each signal-display unit, said remote control device comprising a radio-frequency transmitter including a pair of independently actuatable means actuatable to effect communication by said transmitter from a remote location selectively and exclusively with a different one of said receivers independently of communication with the other receiver, such independent communication capability enabling the establishment from such a remote location of a plurality of different selected traffic movement conditions in the region between said units.

Claim 3

The system of claim 1, wherein each signal-display element comprises a lamp, and the means enabling monitoring of the state thereof comprises an optical system disposed adjacent said lamp for directing light produced thereby outwardly away from said opposite side of the signal-display unit containing the lamp.

Claim 4

The traffic control system of claim 1 wherein the signal-display element comprises a lamp, a signal-display unit includes a lens through which said lamp is observable on said one side of the unit, and the means enabling monitoring of the state of the signal-display element comprises another lens on said opposite side of the unit laaterally offset from said first-mentioned lens.

Claim 5

A portable traffic control system for controlling traffic movement in a zone comprising a pair of portable signal-display units, each having a front and a back side, and each including a signal-display element placeable selectively in signaling and nonsignaling states, with the state of such element at any given time being observable simultaneously from both of said sides, said units being adapted to be placed for use at spacedapart points in said zone, with said front sides facing outwardly of the zone, and said back sides facing into the zone, and signal-display actuating means comprising a radio-frequency receiver for each signal-display unit, and a remote control device for the receivers of the two units comprising a radio-frequency transmitter, said radio-frequency transmitter including a first actuating means actuatable to place the transmitter in one selectively controlled transmitting state for communicating selectively and exclusively with one of said receivers independently of the other, and a second actuating means actuatable independently of said first actuating means to place the transmitter in another selectively controlled transmitting state for communicating with the other receiver independently of said one receiver, such independent communication capability enabling the establishment from the location of said transmitter of a plurality of different selected traffic movement conditions in said zone.

Claim 6

A portable traffic control system for controlling traffic movement in a zone comprising a pair of portable signal-display units, each having a front and a back side, and each including a signal-display element placeable selectively in signaling and nonsignaling states, with the state of such element at any given time being observable simultaneously from both of said sides, said units being adapted to be placed for use at spacedapart points in said zone, with said front sides facing outwardly of the zone, and said back sides facing into the zone, and signal-display actuating means comprising a radio-frequency receiver for each signal-display unit, and a remote control device for the receivers of the two units comprising a radio-frequency transmitter, said radio-frequency transmitter including a first actuating means actuatable to place the transmitter in one selectively controlled transmitting state for communicating selectively and exclusively with one of said receivers independently of the other, and a second actuating means actuatable independently of said first actuating means to place the transmitter in another selectively controlled transmitting state for communicating with the other receiver independently of said one receiver, such independent communication capability enabling the establishment from the location of said transmitter of a plurality of different selected traffic movement conditions in said zone.