David Crosthwait was an African-American mechanical and electrical engineer

Engineer

An engineer is a professional practitioner of engineering, concerned with applying scientific knowledge, mathematics and ingenuity to develop solutions for technical problems. Engineers design materials, structures, machines and systems while considering the limitations imposed by practicality,...

, inventor, and writer. He was born in the city of Nashville

Nashville, Tennessee

Nashville is the capital of the U.S. state of Tennessee and the county seat of Davidson County. It is located on the Cumberland River in Davidson County, in the north-central part of the state. The city is a center for the health care, publishing, banking and transportation industries, and is home...

, Tennessee

Tennessee

Tennessee is a U.S. state located in the Southeastern United States. It has a population of 6,346,105, making it the nation's 17th-largest state by population, and covers , making it the 36th-largest by total land area...

. He grew up in Kansas City

Kansas City, Missouri

Kansas City, Missouri is the largest city in the U.S. state of Missouri and is the anchor city of the Kansas City Metropolitan Area, the second largest metropolitan area in Missouri. It encompasses in parts of Jackson, Clay, Cass, and Platte counties...

, Missouri

Missouri

Missouri is a US state located in the Midwestern United States, bordered by Iowa, Illinois, Kentucky, Tennessee, Arkansas, Oklahoma, Kansas and Nebraska. With a 2010 population of 5,988,927, Missouri is the 18th most populous state in the nation and the fifth most populous in the Midwest. It...

. Once he completed high school he received a Bachelor of Science (1913) and a Masters of Engineering (1920) from Purdue University

Purdue University

Purdue University, located in West Lafayette, Indiana, U.S., is the flagship university of the six-campus Purdue University system. Purdue was founded on May 6, 1869, as a land-grant university when the Indiana General Assembly, taking advantage of the Morrill Act, accepted a donation of land and...

. He was granted an honorary doctoral degree in 1975 but died one year later.

Career

Crosthwait’s expertise was on air ventilation, central air conditioning, and heat transfer systems. With this knowledge he created many different heating systems, refrigeration methods, temperature regulating devices, and vacuum pumps. For these inventions he holds 39 United States patents, as well as 80 international patents. In the 1920s and 1930s Crosthwait invented a vacuum pump, a boiler, and a thermostat control, all for more effective heating systems for larger buildings. Some of his greatest accomplishments were for creating the heating systems for the Rockefeller Center

Rockefeller Center

Rockefeller Center is a complex of 19 commercial buildings covering between 48th and 51st streets in New York City, United States. Built by the Rockefeller family, it is located in the center of Midtown Manhattan, spanning the area between Fifth Avenue and Sixth Avenue. It was declared a National...

 and New York’s Radio City Music Hall

Radio City Music Hall

Radio City Music Hall is an entertainment venue located in New York City's Rockefeller Center. Its nickname is the Showplace of the Nation, and it was for a time the leading tourist destination in the city...

.

He later wrote an instruction manual and guides for heating and cooling with water and guides, standards, and codes that dealt with heating, air conditioning, and ventilation systems.

Later life

After retiring from the field in 1971, Crosthwait began to teach a course on steam heating theory and control systems at Purdue University. He was awarded an honorary doctorate from Purdue University in 1975, and died in 1976.

External links

• Profile of David Crosthwait - The Black Inventor Online Museum