William Henry Bristol
Encyclopedia
William Henry Bristol, inventive genius, pioneering manufacturer, educator, and environmentalist, was born in Waterbury
Waterbury
Waterbury is a city in Connecticut in the United States.Waterbury may also refer to any one of the following:-Places:United States*Waterbury, Nebraska*Waterbury, Vermont*Waterbury , Vermont,a village within the town of Waterbury, Vermont....

, Connecticut on July 5, 1859, the eldest of six children.

After graduating from the Stevens Institute of Technology
Stevens Institute of Technology
Stevens Institute of Technology is a technological university located on a campus in Hoboken, New Jersey, USA – founded in 1870 with an 1868 bequest from Edwin A. Stevens. It is known for its engineering, science, and technological management curricula.The institute has produced leading...

 in 1884 with an engineering degree, he returned there in 1886 as an instructor and progressed to become a professor of mathematics in 1899. While at Stevens, he patented products including a steel lacing for industrial belts and a pressure chart recorder
Chart recorder
A chart recorder is an electromechanical device that records an electrical or mechanical input trend onto a piece of paper . Chart recorders may record several inputs using different color pens and may record onto strip charts or circular charts...

. The need to manufacture these products led to the founding of the Bristol Company in 1889 with his brother, Franklin, and his father, Benjamin. By 1915, the company was manufacturing the largest and most complete line of industrial instruments in the world, including instruments to measure and record temperature, electricity, pressure, motion, time, flow, and humidity. These instruments were the first to provide an uninterrupted history of manufacturing plant operations; increasing efficiency, improving quality, and allowing higher rates of productivity.

He was awarded the John Scott Medal in 1890. Edward Longstreth Medal from the Franklin Institute
Franklin Institute
The Franklin Institute is a museum in Philadelphia, Pennsylvania, and one of the oldest centers of science education and development in the United States, dating to 1824. The Institute also houses the Benjamin Franklin National Memorial.-History:On February 5, 1824, Samuel Vaughn Merrick and...

 in 1894.

In 1904, Professor Bristol invented the first practical pyrometer
Pyrometer
A pyrometer is a non-contacting device that intercepts and measures thermal radiation, a process known as pyrometry.This device can be used to determine the temperature of an object's surface....

 for measuring high temperatures. This created another new industry and led to the formation of the William H. Bristol Pyrometer Company in New York City.

In 1915, he invented the “Bristolphone” to simultaneously record voices and other sounds with motion in moving pictures. He founded the William H. Bristol Talking Picture Corporation to develop “synchronized talking motion pictures,” and produced one of the first full-length motion pictures with sound. The Bristolphone was used in nearly one hundred movie houses in the U.S. He also developed and manufactured loud speakers, power amplifiers, radios and phonograph recorders. His “Audiophone,” which was used at Yankee Stadium and Grand Central Station in New York, revolutionized public address systems.

William Bristol was awarded medals at expositions in Chicago (1893), Paris (1900), Saint Louis (1904), San Francisco (1915) and Philadelphia (1926). He received two awards from the Franklin Institute
Franklin Institute
The Franklin Institute is a museum in Philadelphia, Pennsylvania, and one of the oldest centers of science education and development in the United States, dating to 1824. The Institute also houses the Benjamin Franklin National Memorial.-History:On February 5, 1824, Samuel Vaughn Merrick and...

to honor his distinguished career. He gained worldwide recognition while making possible major advances in both pure scientific knowledge and industrial technology. Bristol, who received nearly 100 patents during his lifetime, died on June 18, 1930.
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