I recently discovered an interesting database called Espacenet. It is an online service for searching patents and patent applications. According to their website, “Espacenet offers free access to information about inventions and technical developments from 1782 to today.” I typed in “Casbon” to see what would happen. Lo and behold—several patents showed up! So, today’s post will recognize two inventors in the family.

The earliest patent dates from 1908 and is titled “Improvements in Safety Labels or Tags or Tag Attachments for Game, Parcels, or Horticultural or the like uses.” The applicant was “Charles Casbon of 5 Rathcole Gardens Hornsey in the County of Middlesex Gentleman.”[1]

In his application, Mr. Casbon explains that, previous to his design, “much labour and material has been expended in order to produce a safety tag which could not be torn from the article to which it was fastened and at the same time would bear the impress or imprint of the name or destination or description of the article.”[2] His improved tag is cut or stamped from a single piece sheet metal, consisting of a tag, a strap, and slots for securing the strap.

Charles Casbon’s design for a safety tag;

I have written about Charles Casbon before. He was the son of Thomas Casbon (1840–1889) and Emily Cantrill (1846–1891) and was born at Peterborough, Northamptonshire
18 June 1866.[3] Thomas and Emily were legally separated in 1868 and Charles was raised by his mother. He became a professional photographer. Charles died in France, 6 August 1930.[4]

I don’t know what led Charles to design a new and improved method of producing safety tags. Perhaps it somehow related to his photography work. I also don’t know whether he profited from his invention in any way

The second inventor was William Casbon. His name appears on several patents dealing with gas an electric lights and heaters. The earliest of these was titled “Improvements in Incandescent Gas Burners” and was applied for in December 1915.[5] This was followed by applications for “An Appliance for Attaching Shades to the Holders of Electric Light Fittings,”[6] “Improvements in Inverted Incandescent Gas Burners,”[7] “Improvements in Atmospheric Gas Burners for Heating Purposes,”[8] and “Improvements in Incandescent Gas Burners,”[9] (apparently an improvement on the earlier patent of the same title). I also found a U.S. patent granted to Yagerphone Ltd. in 1929, listing William as the inventor of a tone arm for gramophones.[10]

William Casbon’s and Arthur James Dunkinson’s design for improvements in inverted incandescent gas burners;
William Casbon’s design for a gramophone tone arm;

Most of these patents gave the names of William Casbon and Arthur James Dunkinson as co-inventors. William described himself as a “gentleman.” Dunkinson’s occupation is written in one application as “General Foremen, Architects Department” for His Majesty’s Office of Works.[11]

Who was William Casbon? Although there were two adult men of that name living at the time of the patent applications, only one is the likely candidate for our inventor. He had a most interesting life. He was born at Meldreth in 1860, the son of William Casbon and Sarah West.[12] Based on census listings, his occupations included “railway signalman” (1881),[13] “baker” (1891),[14] “golf club manager” (1901),[15] and finally, in 1911, “catering.”[16] The latter occupation is understated, as William was serving as Superintendent of the Refreshments Department of the House of Lords. I believe William was also the man who sought a position as a footman in 1884.

I’m confident about William’s identity because of his relationship to his co-inventor, Arthur James Dunkinson. It turns out that Mr. Dunkinson was married to William’s niece, Emily Casbon, daughter of William’s brother, Walter. Emily was listed as a member of William’s household in the 1901 census, so she must have had a close relationship with her uncle.

I don’t know what William did for a living after retiring from the House of Lords position; I have found him listed is residential directories for both Hitchin, Hertfordshire—the location given in the patent applications—and in London. Perhaps he had residences in both locations. Nor do I know how he came to be interested in gas fixtures, electric lights and gramophones. He must have been a man of many interests and an active mind. He died in London 8 September 1939.[17]

It’s interesting that both Charles and William described themselves as gentlemen. In earlier times, the term gentleman referred to a particular social class, associated with the aristocracy, the right to bear arms, and perhaps with independent means. It was understood that manual laborers and tradesmen could not describe themselves as gentlemen. This meaning of the word seems to have become obsolete by the end of the 19th century, and anyone with sufficient means and good manners might be considered a gentleman.[18] Still, it seems odd that Charles and William chose to use the term rather than their professions as photographer and caterer. Perhaps they felt that it would give their patent applications greater standing.

[1] C. Casbon, patent certificate no. GB190803244A (27 Aug 1908); text and images, European Patent Office, database ( accessed 8 Nov 2020).
[2] C. Casbon, patent certificate no. GB190803244A.
[3] Emily Casbon, Petition for judicial separation, 9 May 1868; image included in “England & Wales, Civil Divorce Records, 1858-1918,” Ancestry ( : accessed 1 Dec 20) >1868 >00781-00790 >00787: Casbon >images 7-8 of 9; citingThe National Archives; Kew, Surrey, England; Court for Divorce and Matrimonial Causes, later Supreme Court of Judicature: Divorce and Matrimonial Causes Files; Class: J 77; Piece: 84; Item: 787.
[4] Commune de Levallois-Perret, Saint-Denis, Seine, France, Extract du Registre des Acts de Décés pour l’année 1930 (death on 6-8-30 at Levallois-Perret of Chares Wheeley Cas[b]on); imaged at “UK, Foreign and Overseas Registers of British Subjects, 1628-1969,” Ancestry ( : accessed 1 Dec 20) >RG 32: Miscellaneous Foreign Returns, 1831-1969 >Piece 16: Miscellaneous Foreign Returns, 1927-1931 >image 209 of 716; citing The National Archives, RG 32/16.
[5] W. Casbon, A.J. Dunkinson, patent certificate no. GB191517089A (30 Nov 1916); text and images, European Patent Office, database ( accessed 8 Nov 2020).
[6] J. Doble and W. Casbon, patent certificate no. GB109706A (27 Sep 1917); European Patent Office, database ( accessed 8 Nov 2020).
[7] W. Casbon and A.J. Dunkinson, patent certificate no. GB107359A (28 Jun 1917); European Patent Office, database ( accessed 8 Nov 2020).
[8] W. Casbon and A.J. Dunkinson, patent certificate no. GB126818A (22 May 1919); European Patent Office, database ( accessed 8 Nov 2020).
[9] W. Casbon and A.J. Dunkinson, patent certificate no. GB151393A (30 Sep 1920); European Patent Office, database ( accessed 8 Nov 2020).
[10] W. Casbon, assignor to Yagerphone Ltd., patent certificate no. 1,713,419 (U.S.A., 1929); European Patent Office, database ( accessed 8 Nov 2020).
[11] W. Casbon, A.J. Dunkinson, patent certificate no. GB191517089A.
[12] Transcript of birth registration, William Casbon, mother’s maiden name West, GRO reference 1860 S[eptember] Quarter, Royston, vol. 3A/205; found at “Search the GRO Online Index,” database, HM Passport Office ( : accessed 1 Dec 20).
[13] 1881 England census, Derbyshire, Breadsall, p. 2, schedule 9, William Caskan in household of Joyce Bailey; imaged as “1881 England Census,” Ancestry ( : accessed 1 Dec 20) > Derbyshire >Breadsall >ALL >District 11 >image 3 of 24; citing The National Archives, RG 11/3393/67.
[14] 1891 England census, London, St. George Hanover Square, Mayfair, ED 14, p. 20, schedule 56, William Caston in household of William Bryceson; imaged as “1891 England Census,” Ancestry ( : accessed 1 Dec 20) > London >St George Hanover Square >Mayfair >District 14 >image 13 of 42; citing The National Archives, RG 12/69.
[15] 1901 England census, Hertfordshire, Chorleywood, ED 11, p. 19, schedule 136; imaged as “1901 England Census,” Ancestry ( : accessed 1 Dec 20) >Hertfordshire >Chorleywood >ALL >District 11 >image 20 of 24; citing The National Archives, RG 13/1322.
[16] 1911 England census, Westminster, St. Margaret & St. John, ED 24, schedule 10; imaged as “1911 England Census,” Ancestry ( : accessed 1 Dec 20) > London >St Margaret and St John >St Margaret and St John >24 >image 76 of 227; citing The National Archives, RG 14/489.
[17] “England & Wales, National Probate Calendar (Index of Wills and Administrations), 1858-1995,” database with images, Ancestry ( : accessed 1 Dec 20) > 1944 >Cable-Dziegielewski >image 36 of 395; Wills and Administrations, 1944, p. 70, entry for William Casbon.
[18] Encyclopaedia Britannica, 11th Edition, “Gassendi, Pierre” to “Geocentric,” Vol. 11, Slice 5, “Gentleman”; downloaded as EPUB, Project Gutenberg ( : accessed 1 Dec 20).

2 thoughts on “Inventors”

  1. What an interesting find! My brother worked on a patented invention back in the ’80s when he worked for General Electric. I put our last name in Espacenet, and the invention popped right up with his name. (Not that I have the faintest idea of what it is. Something to do with the semiconductor industry.)

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