Today in History: David Nelson Crosthwait Jr. – The Heating Pioneer


David Nelson Crosthwait Jr. was born in Nashville, Tennessee, on May 27, 1898. His interest in mechanics led him to Purdue University, where he studied mechanical engineering. After graduation, he took a job with the C.A. Dunham Co. conducting innovative research. There, he designed the heat system for New York City’s Rockefeller Center and Radio City Music Hall. On Oct. 16, 1934, he patented his invention. Crosthwait held 119 patents — 39 in the U.S. and 80 internationally — all in relation to heating, cooling and temperature-regulating technology.

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Today in History: Otis Boykin, 20th Century Inventor of 21st Century Tech

Inventor Otis Boykin was born Aug. 29, 1920 in Dallas, Texas and died March 13, 1982. His most notable invention was an improved electrical resistor used in computers, radios, and various electronic devices.

On June 16, 1959, Boykin received a patent for a wire precision resistor. A resistor slows down the electrical current to keep the device functioning and to prevent too much electricity from passing through it. This particular resistor would be used in radios and televisions.

In 1964, Boykin moved to Paris. While there, he created electrical resistance components used in computers and resistors in guided missile systems. He also invented the chemical air filter and a burglarproof cash register.

He is also know for inventing a control unit for the pacemaker. The unit created electrical impulses to stimulate the heart and manage a steady heartbeat.

Overall, Boykin earned 11 patents and invented 28 different electronic devices.