Search results
Results from the WOW.Com Content Network
Known for. Transportation Safety. Charles Adler Jr. (June 20, 1899 – October 23, 1980) was an American inventor and engineer. He is most known for developing devices meant to improve transportation safety, including sonically actuated traffic lights, colorblind road signals, pedestrian push-buttons, and flashing aircraft lights.
Traffic signs or road signs are signs erected at the side of or above roads to give instructions or provide information to road users. The earliest signs were simple wooden or stone milestones . Later, signs with directional arms were introduced, for example the fingerposts in the United Kingdom and their wooden counterparts in Saxony .
Crossword-like puzzles, for example Double Diamond Puzzles, appeared in the magazine St. Nicholas, published since 1873. [30] Another crossword puzzle appeared on September 14, 1890, in the Italian magazine Il Secolo Illustrato della Domenica. It was designed by Giuseppe Airoldi and titled "Per passare il tempo" ("To pass the time"). Airoldi's ...
Signs including Stop, Yield, No Turns, No Trucks, No Parking, No Stopping, Minimum Speed, Right Turn Only, Do Not Enter, Weight Limit, and Speed Limit are considered regulatory signs. Some have special shapes, such as the octagon for the Stop sign and the crossbuck for railroad crossings.
Garrett Morgan. Garrett Augustus Morgan Sr. (March 4, 1877 – July 27, 1963) was an American inventor, businessman, and community leader. His most notable inventions were a type of three-way traffic light, [1] and a protective 'smoke hood' [2] notably used in a 1916 tunnel construction disaster rescue. [3][4] Morgan also discovered and ...
A key feature of the cat's eye is the flexible rubber dome which is occasionally deformed by the passage of traffic. A fixed rubber wiper cleans the surface of the reflectors as they sink below the surface of the road [2] (the base tends to hold water after a shower of rain, making this process even more efficient). The rubber dome is protected ...
Barnes Wallis (1887–1979), bouncing bomb. Josiah Wedgwood (1730–1795) invented jasperware. Edward Weston (1850–1936), Weston cell. Frank Whittle (1907–1996), co-inventor of the jet engine. William Winlaw (d.1796), patented agricultural machinery. Arthur Wynne (1862–1945), inventor of crossword puzzle.
A roundabout, a rotary and a traffic circle are types of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junction. [ 1 ][ 2 ] In the USA, engineers use the term modern roundabout to refer to junctions installed after ...