Arthur Scherbius (20 October 1878–13 May 1929) was a German electrical engineer who patented an invention for a mechanical cipher machine, later sold as the Enigma machine. October 20 is the 293rd day of the year (294th in leap years) in the Gregorian Calendar, with 72 days remaining. ... 1878 was a common year starting on Tuesday (see link for calendar). ... May 13 is the 133rd day of the year in the Gregorian Calendar (134th in leap years). ... 1929 was a common year starting on Tuesday (link will take you to calendar). ... An engineers degree is an academic degree which is intermediate in rank between a masters degree and a doctorate; it is occasionally to be encountered in the United States in technical fields. ... In the history of cryptography, the Enigma was a portable cipher machine used to encrypt and decrypt secret messages. ...

Scherbius was born in Frankfurt-am-Main and was the son of a small businessman. He studied electricity at the Technical College in Munich, and then went on to study at the Technical College in Hanover, finishing in March 1903. The next year, he completed a dissertation, "Proposal for the Construction of an Indirect Water Turbine Governor", and was awarded a doctorate in engineering. Frankfurt am Main [ˈfraŋkfʊrt] is the largest city in the German state of Hesse and the fifth largest city in Germany. ...

Scherbius subsequently worked for several electrical firms in Germany and Switzerland. In 1918, he founded the firm of Scherbius & Ritter. He made a number of inventions, e.g. asynchronous motors, electric pillows and ceramic heating parts; his research contributions led to his name being associated with the Scherbius principle for asynchrous motors. 1918 was a common year starting on Tuesday of the Gregorian calendar (see link for calendar) or a common year starting on Wednesday of the Julian calendar. ...

Scherbius applied for a patent (filed 23 February 1918) for a cypher machine, and eventually began to market the Enigma cypher machine for commercial use. Scherbius' company also purchased the rights to another patent for a rotor machine from Hugo Koch -- patented in 1919. Business was slow enough that the firm was reorganized at least twice in the 1920s. A patent is a set of exclusive rights granted by a state to a person for a fixed period of time in exchange for the regulated, public disclosure of certain details of a device, method, process or substance (known as an invention) which is new, inventive and useful. ... February 23 is the 54th day of the year in the Gregorian Calendar. ... 1918 was a common year starting on Tuesday of the Gregorian calendar (see link for calendar) or a common year starting on Wednesday of the Julian calendar. ... In cryptography, a rotor machine is a electro-mechanical device used for encrypting and decrypting secret messages. ... In the history of cryptography, the Enigma was a portable cipher machine used to encrypt and decrypt secret messages. ... 1919 was a common year starting on Wednesday (see link for calendar). ... Sometimes referred to as the Jazz Age or primarily in North America as the Roaring Twenties. // Events and trends Technology John T. Thompson invents Thompson submachine gun, also known as Tommy gun John Logie Baird invents the first working mechanical television system (1925) Charles Lindbergh becomes the first person to...

There were several commercial models, and one of them was adopted by the German Navy (in a modified version) in 1926. The German Army adopted the same machine (also in a modified version somewhat different than the Navy's) a few years later. 1926 was a common year starting on Friday (link will take you to calendar). ...

Scherbius saw none of this as he was killed in a horse carriage accident in 1929. Tourists in a vis-a-vis, Prague The classic definition of a carriage is a four-wheeled horse-drawn private passenger vehicle with leaf springs or leather strapping for suspension, whether light, smart and fast or large and comfortable. ... 1929 was a common year starting on Tuesday (link will take you to calendar). ...