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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 ...
His first patent was in 1909, inventing a door lock that turned lights on and off. [1] At the time, Schlage was a citizen of Germany residing in Berkeley, California. [2] In 1919, Schlage patented a door knob which, when pushed up, locked the door. [3] [4] This was succeeded by a door knob incorporating a push-button lock, patented in 1924. [5]
In British, Australian, French, and Swiss railway signalling, an Annett's key is a form of trapped-key interlocking that locks levers or other items of signalling apparatus, thereby serving as a portable form of interlocking. The purpose is to prevent access from sidings to the running line without authority. [1]
Schlage is a surname. Notable people with the surname include: Walter Schlage (1882–1946), German-born American engineer and inventor; Willi Schlage (1888–1940 ...
Walter Schlage – engineer, inventor, and businessman; founder of Schlage Manufacturing company in San Francisco; John Schnatter – founder of Papa John's Pizza; Jacob Schiff – banker and philanthropist; Julius Schmid – creator of the Sheik condom and the Ramses condom [173] [174] Charles M. Schwab – steel magnate (Bethlehem Steel) [175]
Lock n' Load with R. Lee Ermey is a reality television series about the development of military weaponry throughout the centuries. Hosted by actor and former U.S. Marine drill instructor R. Lee Ermey , its one season originally aired on the History channel in 2009.
A trade secret is a form of intellectual property comprising confidential information that is not generally known or readily ascertainable, derives economic value from its secrecy, and is protected by reasonable efforts to maintain its confidentiality.
It is the longest staircase lock in Britain, lifting boats 64 feet (20 m). [1] It consists of eight locks, each 180 feet (55 m) by 40 feet (12 m), and it takes boats about 90 minutes to pass through the system. [1] [2] [3] The current lock gates weigh 22 tons each, and require a team of at least three lock-keepers to operate the staircase.
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