Specification of James Dewar : employing vulcanite in forming instruments for inhalation, &c.

  • Dewar, James, 1842-1923.
Date:
1867
Catalogue details

Licence: Public Domain Mark

Credit: Specification of James Dewar : employing vulcanite in forming instruments for inhalation, &c. Source: Wellcome Collection.

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    A.D. 1867, 27 th April. N° 1222. Employing Vulcanite in Forming Instruments for Inhalation, &c. LETTERS PATENT to James Dewar, Doctor of Medicine, residing in Kirkcaldy, in the County of Fyfe, North Britain, for the Invention of “ Improvements upon the Instrument called the ‘ Spray Producer.’ ” Sealed the 24th September 1867, and dated the 27th April 1867. PROVISIONAL SPECIFICATION left by the said James Dewar at the Office of the Commissioners of Patents, with his Petition, on the 27th April 1867. I, James Dewar, Doctor of Medicine, residing in Kirkcaldy, in the County 5 of Fyfe, North Britain, do hereby declare the nature of my said Invention for “ Improvements upon the Instrument called the c Spray Producer,’ ” to be as follows:— According to my Invention the “ spray producer ” is to be made or composed of the substance called “ vulcanite,” whereby sulphurous acids and other 10 corrosive liquids can be used for the purposes of cure by inhalation and otherwise without injury to the instrument. My Invention does not consist in the Invention of the instrument called the “ spray producer,” but in the employment of “ vulcanite,” as the material from which the instrument is to be manufactured. The substances at present .15 employed for that purpose are either very expensive and brittle or of a cor¬ rodible nature, and unsuitable for the application of sulphurous acids and other corrosive liquids to the purposes of cure by inhalation and otherwise.