Charles L. Krum was a key figure in the development of the Teletype, a machine which played a key role in the history of telegraphy and computing. A teleprinter (teletypewriter, teletype or TTY) is a now largely obsolete electro-mechanical typewriter which can be used to communicate typed messages from point to point through a simple electrical communications channel, often just a pair of wires. ... Telegraphy (from the Greek words tele = far and graphein = write) is the long-distance transmission of written messages without physical transport of letters, originally over wire. ... Originally, the word computing was synonymous with counting and calculating, and a science that deals with the original sense of computing mathematical calculations. ...

The history of the Teletype and of Charles Krum's involvement in it, begins in 1902. 1902 was a common year starting on Wednesday (see link for calendar). ...

In 1902, electrical engineer Mr.Frank Pearne approached Mr. Joy Morton head of Morton Salt seeking a sponsor for Pearne's research into the practicalities of developing a printing telegraph system. Morton Salt is a United States company specializing in the production of salt for food, water conditioning, industrial, agricultural, and road/highway use. ... Telegraphy (from the Greek words tele = far away and grapho = write) is the long distance transmission of written messages without physical transport of letters, originally over wire. ...

Joy Morton needed to determine whether this was worthwhile and so consulted renowned mechanical engineer Charles Krum, who was vice president of the Western Cold Storage Company (which was run by Morton’s brother Mark Morton). Mark Morton (November 22, 1858 - June 25, 1951) was a U.S. industrialist and experimental farmer. ...

Krum gave Joy Morton a positive response to the idea of helping Pearne, so space to set up a laboratory in the attic of Western Cold Storage was provided to Pearne.

Pearne, after about a year of unsuccessful experiments, lost interest and left to get involved in teaching.

Krum was prepared to continue Pearne’s work, and in 1903 a patent was filed for a ‘typebar page printer’ (Patent No. 888,335; filed August 22, 1903; issued May 19, 1908). 1903 has the latest occurring solstices and equinoxes for 400 years, because the Gregorian calendar hasnt had a leap year for seven years or a century leap year since 1600. ... 1908 is a leap year starting on Wednesday (link will take you to calendar). ...

In the following year, 1904 Krum filed a patent for a ‘type wheel printing telegraph machine’ (Patent No. 862,402; filed August 6, 1904; issued August 6, 1907). 1904 is a leap year starting on a Friday (link will take you to calendar). ... 1904 is a leap year starting on a Friday (link will take you to calendar). ... 1907 was a common year starting on Tuesday (see link for calendar). ...

In 1906 Charles Krum's son Howard Krum graduated in electrical engineering and joined his father in this work. 1906 was a common year starting on Monday (see link for calendar). ...

Alot more details to go into this article, including E. E. Kleinschmidt and Morkrum involvement in Teletype development.