Specification of Alcidalis Auguste Romain Damoiseau : apparatus for drawing blood, &c.

  • Damoiseau, Alcidalis Auguste Romain.
Date:
1862
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Alcidalis Auguste Romain Damoiseau : apparatus for drawing blood, &c. Source: Wellcome Collection.

    6/10 (page 4)
    Damoiseaus Improvements in Apparatus for Drawing Blood, §c. manner, serve for the purpose of obtaining* tbe requiied alternate lifting and depressing of the skin under the cupping glass, and, consequently, for drawing blood or other liquid from the body to which the glass would have been applied for that purpose. If, consequently, I give hereunder the description of an apparatus I hitherto made use of for the above-mentioned purposes, it 5 is merely to offer an illustration of one of the very many mechanical arrange¬ ments that may serve for obtaining the desired effect; but I wish it to be clearly understood that I do not in the least intend to restrain or restrict myself to the use of this apparatus, or of any modification thereof. In the annexed Drawings, Fige. 1 represents an elevation view on a working 10 scale of the apparatus; the Figs. 2 & 3 respectively show, on a reduced scale, an elevation and a top view of a modification thereof; whereas the remainder of the Figures represent various views of detached parts ; in all these Figures corresponding parts are marked by the same letters of reference. The apparatus consists of a double-barrelled air pump, the barrels or 15 cylinders A of which are fixed in a horizontal (as in Fige. 1), or in a vertical position (as in Fige. 2), on a bed plate B and standards B1. In the arrangement shown in Fige. 1, the pistons D are connected together by a link G and by means of the lever F, having its fulcrum in f and properly connected to the link G, the said pistons receive a horizontal reciprocating 20 motion; whereas, in case the cylinders are situated vertically, as shown in Fige. 2, I prefer increasing their diameter, and shorten the stroke of the pistons, and have these latter linked to a horizontal lever beam F, having its fulcrum f in the forked top of the standard B1, so as to allow the operator, the apparatus being placed with its bed plate B on the floor, to work the same 25 by pressing with his feet alternately on each end of the beam F, in order alternately to depress one piston, and cause the opposite one to rise. The pistons should be made to fit exactly in their respective cylinders either by an elastic packing or other means. Each cylinder is provided with an air valve H, represented separately respectively in top and in sectional views in the Figures 4, 30 5, 6, viz., in the two latter, deprived of the strip g of india-rubber that fits over the central or air passage h of the valve, round wdiich passage h is made a furrow or concentric circular groove^', so as to allow the elastic strip g exactly to apply bself against the projecting narrow ring i left protruding between the air passage h and the groove j, so as to offer a perfect closure, and prevent any coagulated 35 blood or other similar matters to remain on the narrow edge of the ring i between this edge and the strip g. A valve N, Figs. 7 and 8, arranged in the same manner, but of smaller size, fits between the ajutage N1 of each cylinder A and the end of the tube C, by which the cylinders are connected to their