Specification of John Read : syringes.

  • Read, John.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: Specification of John Read : syringes. Source: Wellcome Collection.

    5/8 (page 3)
    I A.D. 1820.—N° 4484. 3 Read's Improvement in Syringes. with two screw joints C, C, and a partition between them. In the lower part of the socket is a spherical valve, confined to its action by the above-mentioned partition, which admits the fluid to pass through the nine large holes made in it for that purpose; see Fig. 2; and at the side of the above-mentioned 5 socket, between the two screw joints, is a small branch D, D, in which there is another screw joint containing another small spherical valve, confined to its action by a wire passed through the joint at D. E is a flexible tube bound to the side branch at D, and to the ivory pipe F at the upper end. At the upper end of the tube A is a small pipe G, to admit the air in and out at every 10 motion of the piston; and if any small portion of the fluid should pass by the piston in the act of forcing, the small pipe G will convey it back into the vessel from whence it was taken. And thus the before-mentioned socket C, C, at the bottom of the tube A, and the side branch D, D, containing the three screw joints and two spherical valves, with the small pipe G at the upper end of the 15 tube A, constitute the improved syringe. The mode of using this machine is by placing the lower end of the syringe C, C, in a small vessel filled with water or any other fluid, then by raising the piston B the fluid will pass by the valve in the lower socket C, at the same time the air will pass out through the small pipe G; then by sinking the piston the air will return through the pipe 20 G, and the fluid will be forced through the side branch D, D, and flexible tube E, conducted by the ivory pipe F. Thus by raising and sinking the piston alternately, the fluid may be conveyed from the vessel it which it is deposited with the greatest ease through the flexible tube E, conducted by the ivory pipe F to any place or in any quantity required. H, a bladder, in which 25 the fluid may be applied to the end of the syringe, if in delicate cases it should be rendered necessary. Fig. 3 is an improved syringe of much larger dimensions and longer flexible tube, and may be applied for similar purposes in the veterinary arts; but the improvement is by admitting and discharging the fluid upon the same principle 30 as Fig. 1 and Fig. 2. Fig. 4 is an improved syringe, a most useful machine for watering pines, and all plants in conservatories and hot-houses, and for destroying insects on trees either in forcing houses or on walls, thereby answering every purpose of the barrow engine, with much greater facility and convenience. The tube A 35 and piston B of this syringe are also made nearly upon the same principle as the common syringe; but the improvement by which such power is obtained is by admitting the charge or water to charge the tube by the means of a spherical valve, inclosed in a socket at the lower end of the tube C, C, and by admitting the air to pass through the small pipe G, at the upper end of the