Bion Joseph Arnold (August 14, 1861 – January 29, 1942) was an American engineer. He is remembered as "father of the

third rail A third rail, also known as a live rail, electric rail or conductor rail, is a method of providing electric power to a railway locomotive or train, through a semi-continuous rigid conductor placed alongside or between the rails of a railway t ...

", a pioneer in

electrical engineering Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the l ...

, and an urban mass transportation expert who helped design New York's

Interborough Rapid Transit The Interborough Rapid Transit Company (IRT) was the private operator of New York City's original underground subway line that opened in 1904, as well as earlier elevated railways and additional rapid transit lines in New York City. The IRT w ...

subway system. He also served as a

lieutenant colonel Lieutenant colonel ( , ) is a rank of commissioned officers in the armies, most marine forces and some air forces of the world, above a major and below a colonel. Several police forces in the United States use the rank of lieutenant colone ...

during

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

in the Aviation Section of the Signal Corps.

Early life

Arnold was born in

Casnovia, Michigan Casnovia is a village in the U.S. state of Michigan. It is situated on the boundary between Muskegon and Kent counties and lies partially within both. The population was 319 at the 2010 census. The village is located partially within Tyrone Towns ...

on August 14, 1861.

Civilian career

After graduating from

Hillsdale College Hillsdale College is a Private university, private Conservatism in the United States, conservative Christian liberal arts college in Hillsdale, Michigan. It was founded in 1844 by Abolitionism, abolitionists known as Free Will Baptists. Its missio ...

Michigan Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ...

and the

University of Nebraska-Lincoln A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. Universities typically offer both undergraduate and postgraduate programs. In the United States, t ...

in 1897, Arnold set up his own company in Chicago at a time when railroads were converting their power sources from steam to electricity. In 1898, Arnold developed a new method of converting

alternating current Alternating current (AC) is an electric current which periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in whic ...

from

power plant A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the generation of electric power. Power stations are generally connected to an electrical grid. Many pow ...

s to

direct current Direct current (DC) is one-directional flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even ...

in substations for the

Chicago & Milwaukee Electric Railway The Chicago North Shore and Milwaukee Railroad (reporting mark CNSM), also known as the North Shore Line, was an interurban railroad that operated passenger and freight service over an route between the Chicago Loop and downtown Milwaukee, as w ...

. This innovative electrification system would eventually become a standard in the

interurban The Interurban (or radial railway in Europe and Canada) is a type of electric railway, with streetcar-like electric self-propelled rail cars which run within and between cities or towns. They were very prevalent in North America between 1900 a ...

and

street railway A tram (called a streetcar or trolley in North America) is a rail vehicle that travels on tramway tracks on public urban streets; some include segments on segregated right-of-way. The tramlines or networks operated as public transport are ...

industries. Between 1898 and 1912, he assisted the

New York Central Railroad The New York Central Railroad was a railroad primarily operating in the Great Lakes and Mid-Atlantic regions of the United States. The railroad primarily connected greater New York and Boston in the east with Chicago and St. Louis in the Midw ...

and the

Hudson River Railroad The New York Central Railroad was a railroad primarily operating in the Great Lakes and Mid-Atlantic regions of the United States. The railroad primarily connected greater New York and Boston in the east with Chicago and St. Louis in the Mid ...

in conversion of their lines leading into

Grand Central Terminal Grand Central Terminal (GCT; also referred to as Grand Central Station or simply as Grand Central) is a commuter rail terminal located at 42nd Street and Park Avenue in Midtown Manhattan, New York City. Grand Central is the southern terminus ...

. When the Interborough Rapid Transit's first line opened in 1904, the subway proved to be more popular than envisioned. By 1908, a system designed for a maximum of 600,000 passengers per day was being used by 800,000. Arnold was called upon again to solve the problem. His solution was to place automatic speed control devices on the trains themselves, so that more trains could be run during each hour. Arnold also assisted in the conversion of electrified railways in

Los Angeles Los Angeles ( ; es, Los Ángeles, link=no , ), often referred to by its initials L.A., is the largest city in the state of California and the second most populous city in the United States after New York City, as well as one of the world' ...

and

Pittsburgh Pittsburgh ( ) is a city in the Commonwealth (U.S. state), Commonwealth of Pennsylvania, United States, and the county seat of Allegheny County, Pennsylvania, Allegheny County. It is the most populous city in both Allegheny County and Wester ...

, and the cable car systems in

San Francisco San Francisco (; Spanish language, Spanish for "Francis of Assisi, Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the List of Ca ...

. Arnold was president of the

American Institute of Electrical Engineers The American Institute of Electrical Engineers (AIEE) was a United States-based organization of electrical engineers that existed from 1884 through 1962. On January 1, 1963, it merged with the Institute of Radio Engineers (IRE) to form the Instit ...

from 1903 to 1904.

Military career

On December 14, 1917, Arnold transferred to the regular Army as a lieutenant colonel in the Aviation Section of the Signal Corps. He was assigned to aircraft equipment production in Washington, DC. He was honorably discharged on Feb. 6, 1919. He was a colonel in the inactive reserve after 1929.

Personal life

Arnold lived in

Chicago, Illinois (''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name ...

Death and legacy

Arnold died at his home in Chicago on January 29, 1942, and is buried in Ashland Cemetery, in his hometown of Ashland, Nebraska.

Footnote

References

* *

External links

* {{DEFAULTSORT:Arnold, Bion J 1861 births 1942 deaths Hillsdale College alumni American electrical engineers American railroad pioneers American railroad mechanical engineers United States Army officers Military personnel from Chicago People from Kent County, Michigan Engineers from Illinois Military personnel from Michigan