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This series would ultimately culminate in U.S. patent 1,674,841, filed in 1923, [8] which was sold commercially as the Schlage "A" series lock. [3] Schlage would later make a 1925 filing for a push button cylindrical lock fusing the two 1920 patents with the 1923 patent. [9] Schlage's first shop was at 229 Minna Street, [10] and he moved to 461 ...
Walter Reinhold Schlage (1882–1946) was a German-born American engineer and inventor. Known as the Lock Wizard of Thuringia , he is best known for the bored cylindrical lock and the lock company that bears his name, Schlage Lock Co.
William F. Banham, founder of Banham Security, invented the first automatic latch bolt lock in 1926 after a series of burglaries on his wife's dress shop. He opened up his own locksmith shop on Oxford Street, London, and offered £25 to anyone who could pick or break one of his patented locks [ 25 ] [ 26 ] Banham Group still offer the patented ...
Norsk Data was a minicomputer manufacturer located in Oslo, Norway.Existing from 1967 to 1998, it had its most active period from the early 1970s to the late 1980s. At the company's peak in 1987, it was the second largest company in Norway and employed over 4,500 people.
The Master Key System is a personal development book by Charles F. Haanel that was originally published as a 24-week correspondence course in 1912, and then in book form in 1916. [1]
The first installation was made late in 1942, in a Dornier Do 17Z-10 that was also equipped with the early UHF-band version of the FuG 202 Lichtenstein B/C radar. In July 1942, Schoenert discussed the results of his experiment with General Josef Kammhuber , who authorized the conversion of three Dornier Do 217J-1s , to add a vertical armament ...
A graduated neutral-density filter, also known as a graduated ND filter, split neutral-density filter, or just a graduated filter, is an optical filter that has a variable light transmission. Typically half of the filter is of neutral density which transitions, either abruptly or gradually, into the other half which is clear.