John Boyd Dunlop and the Inflatable Tire

John Boyd Dunlop (1840-1921)

On Dezember 7, 1888, Scottish inventor John Boyd Dunlop patented the pneumatic or inflatable tire. His invention is considered one of the basic building blocks of the automobile manufacturing industry. Today, over 1 billion tires are produced annually in over 400 tire factories.

John Boyd Dunlop was born in 1840 on a farm in Dreghorn, North Ayrshire, Scotland, what is now the eastern outskirts of the town of Irvine. He studied to be a veterinary surgeon at Royal School of Veterinary Studies in Edinburgh, or the “Dick Vet” after its founder, William Dick. Dunlop was known as a hard worker. Even at the age of 19 years he has worked to help the economy of his parents who are farmers. After graduation he pursued this profession for nearly ten years at home, before moving to Downpatrick, Ireland, in 1867. Together with his brother James, he established Downe Veterinary Clinic in Downpatrick and moved on to a practice in Belfast.

John Boyd Dunlop’s veterinary work involved a considerable amount of traveling over roads that were often very rough. Even more uncomfortable were the travels those days by the fact that wheels on carriages had rims of iron or wood. But it was the cobbled streets of Belfast, and his son’s difficulty learning to ride a tricycle with solid rubber tires, that caused Dunlop’s inspiration to strike in 1887. His son was prescribed cycling as cure for a heavy cold. Struck by the idea of making the boy’s tricycle more comfortable, Dunlop developed the inflatable tyre for his son’s tricycle, fitting it to a wooden disc 96 cm across in the yard of his home in Belfast. The tyre was an inflated tube made of canvas and bonded together with liquid rubber. He then took his wheel and a metal wheel from his son’s tricycle and rolled both across the yard together. The metal wheel stopped rolling but the pneumatic continued until it hit a gatepost and rebounded. Dunlop then put pneumatics on both rear wheels of the tricycle. That too rolled better and Dunlop moved on to larger tires for a bicycle. He tested that in Cherryvale sports ground, South Belfast, and patented it on 7 December 1888.

When, in 1889, a well-known local cyclist, Willie Hume, won a race at Cherryvale using a bike with Dunlop’s inflatable tires, the novelty started to catch on. The paper manufacturer, Harvey du Cros, who was in the crowd at the time, bought Dunlop’s patents in 1896 for £3000 and some shares in Du Cros’ newly founded company for the exploitation of Dunlop’s work. Two years after he was granted the patent Dunlop was officially informed that it was invalid as Scottish inventor Robert William Thomson, had already patented the idea in France in 1846 and in the US in 1847. Nevertheless, Dunlop’s development of the pneumatic tire arrived at a crucial time in the development of road transport. Commercial production began in late 1890 in Belfast. But, in the end Dunlop did not make any great fortune by his invention. He died in Dublin in 1921 and today, Dunlop’s image appears on the £10 note, which is in circulation in Northern Ireland.

At yovisto you can watch a historical documentary on post war Ireland and its economy, including references to John Boyd Dunlop and his Dunlop Pneumatic Tyre Company.

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