Improvements in anaesthetizing apparatus / [Charles Stuart Birt].

  • Birt, Charles Stuart.
Date:
1904
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in anaesthetizing apparatus / [Charles Stuart Birt]. Source: Wellcome Collection.

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    N°3575 AJD. 1904 Date of Application, 12th Feb,, 1904 Complete Specification Left, 9th July, 1904—Accepted, 18th Aug., 1904 h PROVISIONAL SPECIFICATION. ‘ Improvements in Anaesthetizing1 Apparatus ’ I. Charles Stuart Birt, of 271 High Street, Sclly Oak, in the County of Worcester, Chemist, do hereby declare the nature of my said invent ion to be as follows: — ■ i My invention relates to improvements in apparatus for anaesthetizing and is particularly applicable for use either in addition to, or separately from, such apparatus now commonly used for dental and similar operations of a minor kind. The well known and commonly used apparatus which dentists use consists of a breathing apparatus, an inhaler which fits onto the patients face connected to a gas bag in turn communicating with a cylinder of compressed nitrous oxide with suitable stop cocks and regulators. Now this anaesthetic produces an insensibility lasting about 20—40 seconds dependant on conditions and the patient, but the period of insensibility is nearer 20 seconds, and with the object of extending this period, more recently an anaesthetic composed of a mixture 1 5 of methyl chloride, ethyl chloride, and methyl bromide is employed known as kk saemoform ” or other similar compound or mixture is sold in tubes, its volatility however is such that before the contents of the sealed tube can be properly projected into the inhaler they have frequently escaped. The object of my invention is to ensure the full benefit of the anaesthetic being available from such sealed tubes, and as already stated my apparatus may be used in conjunction with the usual gas apparatus or be made separately. In applying my invention to a gas apparatus of the usual type I employ the junction containing the face piece just as it is and make a tubular piece onto which the usual junction fits. My tubular piece connects in turn either 23 to the usual gas bag connection or an air bag when used separately from a nitrous oxide apparatus. Soldered at a slight angle upwardly is a smaller side branch from my tubular part and this is arranged with a screw, push button or a pair of claws operated by turning a tap. Which ever of these devices is used it enters the main tube ai the base of the branch junction, being operable 30 from outside. The tube of liquid anaesthetic is placed in a spring metal sheath placed under the junction tube until its shoulder is held tightly by a rubber ring in the junction. Also inside my junction piece is a tray with a vertical metal framework extending above it with two cross bars around which from top to bottom is laoped a piece of lint, renewable for each patient operated upon. The bottom of the tray being wire gauze. When the whole apparatus is fitted up and the face piece applied, the patient may then be allowed to establish proper breathing of air only by opening the air valve to the air bag or gas bag which is used full of air, and so be prepared for the anaesthetic. As soon as breathing is properly established my screw, press button or claws are operated and the drawn out end of the tube of anaesthetic thereby nipoed off. The liquid being projected onto the lint, [Price 20 33 40