Specification of George Claudius Ash : manufacture of artificial teeth.

  • Ash, George Claudius.
Date:
1859
Catalogue details

Licence: Public Domain Mark

Credit: Specification of George Claudius Ash : manufacture of artificial teeth. Source: Wellcome Collection.

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    Provisional jisJi s Improvements in the Manufacture of Jirtifcial Teeth. firing, or a roughened surface may be given to such parts of the tooth as come in contact with the base by grinding, or by the action of fluoric acid, after the tooth has been fired. I prefer, however, the method first mentioned. Mineral teeth, such as have heretofore been set in a vulcanite base, have usually been formed with metal pins projecting from the back of the tooth, and by these pins 5 the tooth is attached to the vulcanite base or in some cases the back of the tooth has been formed with a dovetailed ridge or projection with the same object; * but teeth thus constructed are liable to become detached from a vulcanite base, in consequence of the elasticity of the material. Now, to obtain a more secure connection between the vulcanite base and the teeth, I furnish each tooth both 10 with projections and pins in place of one of these only, as heretofore. SPECIFICATION in pursuance of the conditions of the Letters Patent, filed by the said George Claudius Ash in the Great Seal Patent Office on the 10th December 1859. TO ALL TO WHOM THESE PRESENTS SHALL COME, I, George 15 Claudius Ash, of West View, Hampstead, in the County of Middlesex, send greeting. WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters Patent, bearing date the Eleventh day of June, in the year of our Lord One thousand eight hundred and fifty-nine, in the twenty-second 20 year of Her reign, did, for Herself, Her heirs and successors, give and grant unto me, the said George Claudius Ash, Her special licence that I, the said George Claudius Ash, my executors, administrators, and assigns, or such others as I, the said George Claudius Ash, my executors, adminis¬ trators, and assigns, should at any time agree with, and no others, from 25 time to time and at all times thereafter during the term therein expressed, should and lawfully might make, use, exercise, and vend, within the United Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for “ Improvements in the Manufacture of Artificial Teeth,” upon the condition (amongst others) that I, the said George 30 Claudius Ash, my executors or administrators, by an instrument in writing under my, or their, or one of their hands and seals, should particularly describe and ascertain the nature of the said Invention, and in what manner the same was to be performed, and cause the same to be filed in the Great Seal Patent Office within six calendar months next and immediately after 35 the date of the said Letters Patent.