Improvements in or connected with hypodermic syringes / [Felix De Backer].

  • Backer, Félix de, 1851-1927.
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: Improvements in or connected with hypodermic syringes / [Felix De Backer]. Source: Wellcome Collection.

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    JN° 12,192 A.D. 1894 (Under International Convention.) Date claimed for Patent under Sect. 103 of Act, > being date of first Foreign Application (in} 28th Feb., 1894 France), y Date of Application (in United Kingdom), 23rd June, 1894 Complete Specification Left, 23rd June, 1894—Accepted, 28th July, 1894 COMPLETE SPECIFICATION. 0 Improvements in or connected with Hypodermic Injection Syringes. I, Felix de Backer of 53 Rue de la Chaussee d’Antin, Paris, in the Republic of France, Doctor of Medicine, do hereby declare the nature of this invention and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:— 5 This invention relates to a new kind of syringe for hypodermic injection which allowTs of liquids being employed which have always been protected from the air. My invention which is shown on the accompanying drawing is composed of three parts. 1st. The tube. 10 2nd. The holder or sheath. 3rd. The piston. . The tube which I employ is of a uniform model in order to admit of its being fitted to all my patterns of syringes. It is made of strong glass. This tube is composed of a cylindrical part A B C D terminated by a pointed 15 part E F. The opposite end to this point is open and it may be closed by means of a stopper Gr of cork or other suitable material. < The said tube is placed in a perforated metallic sheath or casing. This sheath, is provided with an internal screw H into which a hollow metallic pointed nozzle may be screwed. In the opposite end of the metallic sheath a. piston J may be 20 pressed by means of a rod K. This rod is marked with a scale ; it may be screwed on the piston J or attached to it in any other manner. . . The tubes AB C D containing the liquid which is to be injected, are filled and prepared in advance, they may be easily sterilised and these operations may be accomplished with the greatest care. The point of the tube is tapered to form a 25 nozzle. The other end is closed by means of a paraffined stopper on which a plug of absorbent wadding is further placed. . . . Each tube only contains the quantity of liquid necessary for a single operation. When it is desired to make an injection a tube is placed in the metallic sheath, the glass point at L is broken off and the metallic point I is screwed on the sheath. 30 It is easily understood that by pressing on the piston J.by means of the rod K, the stopper Gr is simultaneously pushed forward and itself forms a piston for causing the liquid contained in the tube to flow to the outside. When the operation is terminated, the glass tube is removed from the metallic sheath and thrown away. # . 35 The principle of my invention consists, as has just been seen, in preparing tubes hermetically closed in which the liquid injection is placed ; the whole being prepared with the greatest care and by the best antiseptic processes. .As. the tube is only opened at the moment when it is about to be used, the liquid is always maintained rigorously protected from the air and no alteration can be produced. [Price 8d,]