Improvements in anaesthetical or inhaling masks or the like / [Henry Lewis].

  • Lewis, Henry.
Date:
1905
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in anaesthetical or inhaling masks or the like / [Henry Lewis]. Source: Wellcome Collection.

    1/6
    A.B. 1904 N 23,802 Date of Application, 3rd Nov., 1904 Complete Specification Left, 19th July, 1905—Accepted, 24th Aug., 1905 u PlIOVlSlOiS AL SPECIllOATlON. Improvements in Anaesthetical or Inhaling: Masks or the like.’’ 1, He m;y Lewis, oI 18, W'igiiiore Street, Caveiidisli Square, Loiiduii, W., Surgieiii Instrument Maker, do liereby deelare the nature of this invention to he as follows: — This invention relates to anaestlietieal or inhaling masks or the like, d’hese 5 masks usually eomprise an oval faee frame and a light frame-work thereon for supporting a fabric, such as lint for instance, which is impregnated with the anaesthetic or otlier substance to be inhaled. It is found in practice that the anaesthetic or other substance is apt to exude onto tlie framework and thus flow or trickle onto the skin of the patient under treatment, often marking and in 10 some cases burning the skin according to the anaesthetic or other substance employed. The object of the present invention is to prevent the occurrence of the objection above referred to and this is accomplished by so mounting the framework (which supports the lint), upon the face frame which is in contact with the patient’s skin, 15 that any anaesthetic which may run down the frame-work will be led into the face frame which is adapted to act as a gutter to retain the anaesthetic and pre¬ vent it flowing onto the patient. In carrying out the iin’ention according lo one mode as in tlie application to the pocket or collapsible type of mask, the usual oval frame adapted approxi- 2() matelv to fit against the undulations of the face is employed. This frame as usual is also of channeled cross-section and has pivoted to it the usual two cross t>ver bows which when erected for use form a f]’amew(,rk upon which tlie lint impregnated with the anaesthetic may be supported. Further, the lint is as usual held or clipped over the frame-work by means of an oval wire clip])ing 25 ring which is hinged at one side to the before-mentioned fai'c frame. This clip¬ ping ring however is jneferably ])rovided with a small snap fastening to hold it securely in position. Aow the cross-over bows, forming the lint supporting framework have hitherto been pivoted to the inner circumference of the oval face frame but on the outer surface of the same which is in contact Avith the patient’s 30 face; consequently any anaesthetic exuding from the lint onto the bo\As could floAV doAAUi the same onto the patient. According to the invention, these boAvs are jdvoted to the inside of the channelled face frame either dii-ectly onto the frame or to small studs projecting from the same. The latter arrangement is preferred, as it enables the lint supporting frameAvork to stand aAvay further from the face 35 frame. The studs are preferably united by a metal connecting band or stri]) which not only gives additional rigidity to the framcAvoi k but acts as a guard A\-hich holds the lint aAvay from the edge of the gutter or face frame and prevents the lint slipping down onto the edge. This is an advantage as otheiAvise the lint is liable to touch the edge of the gutter and anaesthetic can. trickle doAvn over the edge 40 onto the patient’s face. Ly holding the lint away from the edge any anaesthetic which may trickle doAvn passes into the gutter. The bows are adapted to collapse as usual. It wdll be obvious that any anaesthetic which may How do\vn the frameA\*ork Avill be led into the interior of the channelled face frame where it Avill be retained [Hm-c 8d.J . V