On 9 August 1859, the young carpenter, student, and teacher from Rockville, county of Parke, Indiana, named John Tenbrook Campbell (1833-1911), obtained a patent for a simple five-positional adding device (so-called Addition Machine), similar to these of the earlier French inventors Jean Lépine, and Hillerin de Boistissandeau from the 1720s.
The Addition Machine of John Campbell was a simple adding instrument (see US patent Nr. 24990), shown in the picture below.
It was a simple adding device, which internal mechanism is rather similar to the devices of Lépine and Boistissandeau, although Campbell most probably was not aware of the above-mentioned and had devised the mechanism himself.
It seems the device of Campbell never went into production, and only the patent model (see the lower photo) survived to our time.
The device is a simple finger-operated adding machine, made of metal, wood and paper, with dimensions: 3 cm x 26.2 cm x 10.5 cm. It has five metal wheels set flat into a wooden case with a metal top. Around the top edge of each wheel are placed ten short pins labeled clockwise from 0 to 9. Above each wheel is a round opening in the case. The edge of this opening is also labeled clockwise from 0 to 9.
The tens-carry mechanism is implemented by means of spring slides (marked with G on the patent drawing), placed above the digital wheels. There is also a fixing mechanism provided, implemented by means of stop-bars (marked with Y), and springs (l).
Biography of John Campbell
John Tenbrook Campbell was born on 21 May 1833, in a farm near Montezuma, Parke County, Indiana, to Joseph Campbell (11 May 1808–22 Jan. 1841), and Rachel (Tenbrook or Tinbrook) Campbell (19 June 1814–5 Jan. 1844). Joseph and Rachel married on 27 March 1832, in Parke County, and John Tenbrook was their first child.
Campbells were descendants of a prominent Scottish Clan (do you remember Robert “Rob Roy” McGregor Campbell, the titular hero of Walter Scott’s novel?), many members of which emigrated to the New World in the 17th and 18th centuries. Joseph Campbell was the son of John Campbell (1770-1850), who was born to John and Hannah Rogers (Nickless) Campbell. He married Nancy Rugg in Worcester, Massachusetts on 23 Nov 1793. Full of adventure, he moved his family to Ohio, where Nancy rests on Ohio soil. In 1814 he took his children (five boys) to the wilds of Indiana to what was then Vigo County. Here among many difficulties and hardships of that time his first son, John, Jr. was stolen by the Indians when very young. John and his children were among the earliest pioneers to this area.
John Tenbrook Campbell was the first of seven children and spent his boyhood days in his father’s mills (Rockport Mills on Sugar Creek, several km NW of Annapolis, IN). He had a hard time after the early death of his parents, and at 15 he left home, took part in the building of Wabash and Erie Canal (tending horses for an Irish teamster and hauling fill from the excavation site to dumping pits), then secured employment in a farm, where he remained until he reached 17. Later on, he began as a carpenter, also studying at Annapolis and Western Manual Labor School in Bloomingdale, Indiana (in manual labor schools, students performed manual labor in exchange of their tuition costs). For ten ensuing years, John worked at his trade as a carpenter during the summer and followed the profession of a teacher in the winter season, meantime spending another term at the Labor School. Finally, he graduated as a civil engineer.
John Campbell took part in the Civil War from the very beginning, organizing an infantry regiment to fight for the Northern cause. Captain John Campbell was wounded and returned home in 1862.
After the war, Campbell was appointed on several important public duties, like Assistant Provost Marshall, Treasurer of Parke County (for 2 terms), Assistant Assessor of Internal Revenue, Assistant of the Indiana Bureau of Statistics and Geology, County surveyor (for 10 years), etc. In the 1870s Campbell opened the first hotel in Bloomingdale, but failing to make a success of the enterprise, later went out of business.
Campbell was so constituted mentally that he cannot learn anything until he becomes interested in it, but then only with great difficulty can he be prevented from learning it. He rummaged through libraries, seeking every source of information and mastering the subject in a very short time. When the inventive fever was on, his most important business must stand aside until he solves the problem, whatever it may be, that has presented itself to his mind.
John Campbell published various books and articles in the fields of statistics, geology, labor problems, finance, meteorology, etc., and devised several other devices, e. g. a device for ascertaining the distance, methods of measuring the height of the clouds, and others. In 1872 he published an interesting book—”The great problem of the age: An address on labor reform.” He took out letters patents upon several inventions, e. g. Portable Fence (U.S. Patent 63853), Lifting-Tongs (U.S. Patent 130194), Revolving Cultivator (U.S. Patent 329137), etc. In the 1870s Campbell matured a road system in statutory form for creating, constructing, repairing, and maintaining the public highways, on which he took out copyright.
Campbell was a respected civil engineer. He wrote many newspaper articles, which he gathered in extensive scrapbooks.
John Campbell was married to Anna Bartha (Butterfield) Campbell (23 Jan. 1841-28 Nov. 1917), and they had one daughter, Lillian Jennie (Campbell) Bjorkman (1 Jan. 1869-25 Feb. 1903).
The last few years of his life John Campbell spent in the Indiana State Soldiers’ Home in Lafayette, Tippecanoe County, where he died on 30 April 1911. He was buried in Rockville Cemetery, Parke County, Indiana.