You are here. Home > Data Access > Model > Datasets > Global Ensemble Forecast System (GEFS) A regional North American plot of GEFS forecast data valid at July 13, 2012, at 00 UTC. This 24-hour forecast shows one mean sea-level pressure contour (or isobar) at 1013 hPa for each of the 21 members in the ensemble.
Inventor Mary Anderson received a patent for her car-window cleaning device in 1903. Anderson's invention came about during a trip to New York City when the Alabama-born inventor noticed that streetcar drivers had to open the windows of their cars when it rained in order to see.
The very first street sweeping machine was patented in 1849 by its inventor, C.S. Bishop. For a long time, street sweepers were just rotating disks covered with wire bristles. These rotating disks served as mechanical brooms that swept the dirt on the streets. A black man from Newark, New Jersey, Charles B. Brooks, invented the U.S.' first self-propelled street sweeper truck. Brooks' patent was approved on March 17th, 1896; his application for the patent had been filed on April 20, 1895. His street sweeper had a truck-like frame mounted on axles supported by wheels.