Improvements to and relating to hypodermic syringes / [Louis Roussy].

  • Roussy, Louis.
Date:
1905
Catalogue details

Licence: Public Domain Mark

Credit: Improvements to and relating to hypodermic syringes / [Louis Roussy]. Source: Wellcome Collection.

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    Roussy’s Improvements in and relating to Hypodermic Syringes. 6 10 15 20 the usual glass-collar, there is frictionally adjusted a metallic sleeve provided with slots forming suitable claws on the same, which securely grip the said glass-tube: the said metallic sleeve is further provided with suitable hooks or arms intended to be seized by the fingers of the operator, when he intends to make use of the syringe. The other end of the glass-cylinder is provided with a collar, which on part of its length is cylindrical and externally screw-threaded and on the other part of said length is conical. T pon the said collar there is firmly screwed a metallic sleeve which is internally screw-threaded and of a corresponding conical shape. The usual tubular needle is fixed to the said sleeve by any suitable means. The said syringe is thus very easily dismounted into four distinct pieces which are very easily again put together. With reference to the drawings left with the Provisional Specification in which is shown by way of example, one form of construction of the said syringe, Figure 1 is an elevation of the complete syringe ; Figure 2 is a cross-section through the upper part of the same; Figure 3 shows, on a larger scale and in longitudinal section the connection of the glass-cylinder with the needle-bearer. In the accompanying drawings, Figure 4 is an elevation, of a modified construction. Figure 5 is a cross-section of the upper portion of Figure 4. Figure 6 is a section on the line x—y of Figure 5. Figure 7 shows on an enlarged scale the connection of the glass-cylinder with 25 the needle-bearer of this modified construction. Figure 8 is a section on the line y-—z of Figure 4. In several figures, the same letters of reference refer to the same portions. In the Figures 1 to 3, the glass-cylinder a is made of such dimensions that the stroke of the piston b, that is to say the useful length of the cylinder, measures 15 or about 15 times the inner diameter of the said cylinder, which diameter will preferably be 4* to 4|- millimeters. The piston is preferably made of amianthas. The interior of the said cylinder is finished to an exactly uniform diameter so that the piston b is fluid tight at any position. On the said glass-cylinder a, which has a collar ax there is frictionally adjusted a metallic sleeve c provided wifh several slots cl so as to form a series of claws which grasp the cylinder, the said sleeve c being further provided with suitable hooks e2 or equivalent means intended to be seized by the fingers of the operator. The end of the glass-cylinder a is provided with a collar extension (Figure 3) formed of an externally screw-threaded cylindrical portion a1 and a conical portion aa, intended to engage the conical portion of the cavity of a metallic sleeve d screwed on the said screw-thread a1 of the collar. The tubular needle e of the svringe is soldered or fixed by any other suitable means to the sleeve d. From the above description it will be seen that in order to clear the syringe after use, it is merely necessary to unscrew the metallic sleeve d, take out the plunger and piston b and immerse the parts in water or disinfectant fluid. The construction showur in the Figures 4 to 8 is substantially the same as the one just described, but in this case the piston-rod is further combined with 50 a metallic cap h having twx> hooks or projections hl which engage the collar ax of the glass-cylinder a. The latter is provided with two notches cd allowing the said hooks or pro¬ jections Id to be thus engaged. This cap h is intended to work as an abutment for the piston b and to prevent 55 the same being pulled out of the cylinder. In this construction the needle-bearer is combined wdth a spring-shaped finger or arm / fixed to a metallic ring g, secured to the glass-cylinder a, This yield- 30 35 40 45