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  5. Railway air brake

Events on March 5 in history

Railway air brake
1872Mar, 5

George Westinghouse patents the air brake.

George Westinghouse Jr.: An American Innovator Who Electrified the World

Born on October 6, 1846, in Central Bridge, New York, George Westinghouse Jr. would grow to become one of America's most influential entrepreneurs and engineers. Though his early life saw him working in his father's machine shop, laying a foundation for his mechanical genius, it was his relocation to Pennsylvania and an insatiable drive for innovation that truly propelled him into the annals of history. Westinghouse, a visionary who received his very first patent at the remarkably young age of 19, didn't just invent; he transformed industries, fundamentally altering how we travel and illuminating our cities.

Revolutionizing Rail Travel: The Fail-Safe Air Brake

Perhaps one of Westinghouse's most enduring and universally adopted inventions is the railway air brake. Before his groundbreaking work, train braking was a dangerous and inefficient affair, often requiring manual application on each car, leading to jerky stops and frequent accidents. Westinghouse saw a critical need for a more reliable, centralized system. On April 13, 1869, he patented a design that would become the cornerstone of modern train safety: a power braking system utilizing compressed air.

His ingenuity led to the formation of the Westinghouse Air Brake Company, specifically organized to manufacture and sell this life-saving invention. What made Westinghouse's system so revolutionary was its "fail-safe" design. Unlike earlier systems that required constant pressure to *apply* the brakes, his system used air pressure to *release* them. Here’s how it worked:

  • Air pressure from the locomotive charges air reservoirs (tanks) located on each individual train car.
  • When these reservoirs are full, signaling full air pressure, the brakes on each car are released.
  • Crucially, any reduction or loss of air pressure—whether deliberate (from the engineer) or accidental (due to a leak or broken line)—immediately signals each car to *apply* its brakes, using the compressed air stored in its local reservoir.

This brilliant fail-safe mechanism ensured that if a train car detached or an air line broke, the brakes would automatically engage, preventing runaway cars and dramatically improving railway safety across the globe. It was a technological leap that saved countless lives and made high-speed rail travel practical.

Pioneering the Electrical Industry: The "War of Currents"

Not content with transforming transportation, Westinghouse set his sights on the burgeoning field of electricity in the early 1880s. He quickly recognized the immense potential of alternating current (AC) for electric power distribution, understanding its superiority in transmitting electricity over long distances with minimal loss compared to its rival. With conviction, he poured all his resources into developing and marketing AC technology.

This bold move placed Westinghouse's burgeoning electrical empire in direct and fierce competition with none other than Thomas Edison. Edison, a staunch proponent of direct current (DC), vehemently argued against AC, creating what became famously known as the "War of Currents." This intense period saw both titans engaging in public demonstrations, scientific arguments, and even smear campaigns to convince the public and investors of their chosen system's safety and efficiency. Edison highlighted perceived dangers of high-voltage AC, while Westinghouse championed its practical advantages for widespread power grids.

Ultimately, Westinghouse's vision prevailed. The inherent advantages of AC, particularly its ability to be stepped up or down in voltage using transformers, made it ideal for powering entire cities and regions efficiently. Despite the contentious rivalry, Edison's own institution, the American Institute of Electrical Engineers (AIEE), later honored Westinghouse. In 1911, he was awarded the prestigious Edison Medal "For meritorious achievement in connection with the development of the alternating current system," a testament to his undeniable impact on the electrical world, even from his former rival's namesake organization.

A Lasting Legacy

George Westinghouse Jr. passed away on March 12, 1914, leaving behind a legacy that continues to power and move our modern world. His relentless pursuit of practical solutions, from the air brake that made trains safe to the alternating current system that lights our homes and runs our industries, solidified his place as a true titan of American innovation. His work laid the groundwork for the vast electrical grids we rely on today and ensured safer, more efficient transportation for generations.

Frequently Asked Questions About George Westinghouse Jr.

Who was George Westinghouse Jr.?
George Westinghouse Jr. was a prominent American entrepreneur and engineer (October 6, 1846 – March 12, 1914) best known for inventing the railway air brake and pioneering the alternating current (AC) electrical power distribution system. He was a prolific inventor, securing his first patent at just 19 years old.
What were his most famous inventions?
His two most significant contributions were the modern railway air brake system, patented in 1869, and his instrumental role in developing and championing the alternating current (AC) electrical system, which became the standard for power distribution worldwide.
What was the "War of Currents"?
The "War of Currents" was a fierce technological and commercial rivalry in the late 19th century between George Westinghouse, who advocated for alternating current (AC), and Thomas Edison, who championed direct current (DC) for electricity distribution. Westinghouse's AC system ultimately proved more efficient for transmitting power over long distances.
What was the Westinghouse Air Brake Company?
The Westinghouse Air Brake Company was founded by George Westinghouse Jr. to manufacture and sell his revolutionary railway air brake invention. It played a crucial role in standardizing safety measures across railway systems globally.
Did George Westinghouse Jr. receive an award from Thomas Edison?
While they were fierce rivals in the "War of Currents," George Westinghouse Jr. was awarded the Edison Medal by the American Institute of Electrical Engineers (AIEE) in 1911 "For meritorious achievement in connection with the development of the alternating current system." This prestigious award, named after his former competitor, recognized his profound impact on the electrical industry.

References

  • George Westinghouse
  • Railway air brake

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Events on 1872

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    Railway air brake

    George Westinghouse patents the air brake.
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