|Died||8 March 1814 (aged 82)
Design of the flush toilet (S-trap)
Church organ designer
Inventor of the first accurate Barograph
Inventor of the Microtome
Alexhander Cumming (sometimes referred to as Alexander Cummings) FRSE (1733 –8 March 1814) was a Scottish watchmaker and instrument inventor, who was the first to patent a design of the flush toilet, that had been invented by Sir John Harrington. The S-trap (or bend) was invented by Cumming in 1775 to retain water permanently within the bowl, thus preventing sewer gases from entering buildings. It survives in today's plumbing modified as a U- or J-shaped pipe trap located below or within a plumbing fixture.
Cumming was a mathematician and mechanic as well as a watchmaker. Little is known of his early life. He was born in Edinburgh in 1733, the son of James Cumming of Duthil. He is recorded as having been apprenticed to an Edinburgh watchmaker.
In the 1750s he was employed by Archibald Campbell, 3rd Duke of Argyll at Inverary as an organ builder as well as a clockmaker. After his move to England he continued to work in both fields. The Earl of Bute and his family commissioned a series of elaborate barrel organs with which Cumming was involved.
By 1763 he had premises in Bond Street, London, and "had acquired a sufficient reputation to be appointed a member of the commission set up in that year to adjudicate on John Harrison's ‘timekeeper for discovering the longitude at sea’". He made a barometrical clock for King George III, who paid him an annual retainer for its maintenance. Other barometrical clocks created by him are at the Science Museum and on the Isle of Bute. He wrote books about watch and clock work, about the effect on roads of carriage wheels with rims of various shapes, and on the influence of gravity.
In 1765 he invented a clock for George III which also acted as a barometer, recording air pressure against time. This is notable as the first accurate recording barograph. In 1766 he made a similar model for his personal use, which on his death was purchased by Luke Howard who used it for his observations within the book The Climate of London.
In 1775 he made the major advance on the design of the flushing toilet by adding the concept of water retention within the pan, preventing foul smells from re-entering the house and generally giving a "cleaner" solution.
With his brother he was involved in the development of the Pentonville district of London, where there is a Cumming street. He had a house in the district and an organ shop.
In 1788 Cumming is recorded as a watch and clock-maker on Bond street in London, responsible for the design and manufacture of a church organ for the Church of the Holy Trinity in Christchurch, Cambridgeshire, having earlier created a "self-acting mechanism" already used for an organ for the Earl of Bute in 1787. In 1814 his final patent appears to be for "antisymmetrical bellows" for organ-use.
He died on 8 March 1814., in Pentonville, England.
- Elements of Clock and Watch Work Adapted to Practice (1766)
He became a magistrate in 1779. In 1781 he was made an honorary freeman of the Clockmakers' Company.
- "From Charles Mackintosh's waterproof to Dolly the sheep: 43 innovations Scotland has given the world". The independent. 30 December 2016.
- "The Development of the Flushing Toilet – Detailed Chronology 1596 onwards". Stoke-on-Trent, UK: Twyfords Bathrooms. Retrieved 2015-05-25.
- Gloria Clifton (2004), "Cumming, Alexander (1731/2–1814)", Oxford Dictionary of National Biography, Oxford University Press. (Subscription or UK public library membership required)
- Malloch (1983). "The Earl of Bute's Machine Organ: A Touchstone of Taste". Early Music Vol. 11, No. 2. OUP. JSTOR 3137830. Accessed via JSTOR (subscription required)
- Lowther Castle National Pipe Organ Register
- Alexander Cumming. "Barometrical Clock". Royal Collection. 2752.
- Bute Collection; Decorative Arts; Mount Stuart online;
- Cumming, Alexander (1731/2-1814). Royal Society
- Organs Brittanica: Organs in Great Britain 1660-1860 by James Boeringer
- Cumming; Polar; [Norwegian];
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