Specification of Arnold Hirst Watkins : respirators.

  • Watkins, Arnold Hirst.
Date:
1871
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Arnold Hirst Watkins : respirators. Source: Wellcome Collection.

    3/4
    Respirators. (This Invention received Provisional Protection only.) PROVISIONAL SPECIFICATION left by Arnold Hirst Watkins at the Office of the Commissioners of Patents, with his Petition, on the 22nd November 1870. I, Arnold Hirst Watkins, of Nailsworth, in the County of 5 Gloucester, Brewer, do hereby declare the nature of the said Invention for “An Improved Respirator to be used in Confined Positions rendered Unhealthy from the Presence of Noxious Gases or Effluvia,” to be as follows :— My Invention has for its object the facilitating of operations con- 10 ducted in unhealthy positions (as stated in the title) by continually supplying fresh or pure air immediately to the mouth or nostrils or both of the workmen or others employed in such positions, and consists in applying and fixing to or in front of the mouth or nostrils of each of the said workmen or others by any suitable means a bag, mask, or 15 covering made of india-rubber, leather, or other suitable material and provided with a valve or valves so constructed and arranged as to open inwards or towards the mouth or nostrils by inspiration and to close by expiration ; and also with a valve or valves so constructed and arranged as to open outwards from the mouth or nostrils by expiration and to