John Chapman (1801–1854) was an English engineer and writer. At different times in his career, he was involved with lace-making machinery, journalism, Hansom cabs and the promotion of railways, cotton and irrigation in India.
He was born at Loughborough, Leicestershire, on 20 January 1801, the eldest of the three surviving sons of John Chapman, a clockmaker there. He received his education first at a school kept by Mr. Mowbray, and then under the Rev. T. Stevenson; he taught himself Greek, and paid a French workman of his father's to teach him French. With other young people he was an involved in the establishment of the Loughborough Permanent Library; and by 1817 he was devoting his Sundays to teaching in the Sunday school, and had become secretary of a peace society, and of the Hampden Club, of which his father was president. At this time he was helping his father in his business.
About 1822, when Chapman was admitted to the General Baptist church, he was concentrating on the machinery required for the bobbinet trade. He joined his brother William in setting up a factory for the production of this machinery; and in a few years was able to build large premises, with a steam-engine. A supporter of the philosophical radicals, when a riot broke out in Loughborough at the time of the Great Reform Bill, he diverted an attack on the rectory, though the rector was an opponent.
In 1832 Chapman visited France to investigate the lace-machine trade there. His own firm was doing a large business, then contraband, with foreign houses. Chapman and others petitioned parliament to repeal the machine exportation laws; but J. & W. Chapman was in 1834 completely ruined.
Chapman set off from Loughbrough to London, leaving his wife and children behind. He first worked for mathematical instrument makers, then obtained employment as mathematical tutor, and wrote for the Mechanic's Magazine, of which for a short time he was editor. He became secretary to the Safety Cabriolet and Two-wheel Carriage Company in 1830; in the same year his wife and children joined him in London. He improved the vehicle which Joseph Hansom was then building, in the direction of the later "Hansom cab". A patent for it was granted to him and an investor called Gillett, on 31 December 1836.
In 1838 Chapman became deacon and superintendent of the Sunday schools of a Baptist chapel, in Edward Street, that moved in 1840 to Praed Street. About the same time he was helping in the management of the Mechanic's Almanac, the Baptist Examiner, the Shareholder's Advocate, and the Railway Times. At a later period he contributed to The Times, Morning Advertiser, Economist, Daily News, Leader, and other publications.