Specification of William Clark : trusses and pessaries.

  • William Clark
Date:
1862
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Clark : trusses and pessaries. Source: Wellcome Collection.

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    Claries Impts. in Hernial and Orthopedic Apparatus and Pessaries, should be hid so as not to appear ^outwardly, and the apparatus is required to be at once very light and strong. After twelve years practice and investi¬ gation, I have discovered the best and most durable mechanical movements, which I have applied to the apparatus forming the object of the present application for Letters Patent. 5 I will proceed to describe these improvements, which I may apply to trusses, orthopedic apparatus, pessaries, and other surgical instruments. Sheet 1, Fig. 1, shows a front view of the movements of the reversable pad ; Fig. 2, a side view of the same; Fig. 3 is an under side view of the pad a, showing one of the movements separately. I will afterwards illustrate the 10 combination of movements of the entire mechanism. Fig. 5 shows separately the eccentric which operates the plate. In order to be effective, the reversing of the truss plate should take place by degrees, which can be obtained by mounting the end of the rod c in a guide formed on the plate, and by which a finger on the end of said rod is operated. The pin x passing through the 15 plate, moves in a groove formed therein, or it may move in the groove on the eccentric, the latter being rotated in any direction. A second means for obtaining the gradual reversal of the plate without any outward projection, is shown in Fig. 6, in under side view, while Fig. 7 shows a top view thereof; Figs. 8, 9, 10, 11, and 12, show, in detail, or separately, the parts made 20 use of to impart the movement. The rod a, to which is connected the spring R, derives a progressive movement from a rod 6, which has between its forked parts or prongs a finger c, connected to the rod a, as shown in side view Fig. 8, and end view Fig. 9. The connecting rod h derives its move¬ ment from a part d, which is formed with teeth externally, while it has an 25 internal screw taking on the wormed part of the connecting rod h, and connected thereto by the part F. Figs. 10 and 11 show in elevation and section details of said parts, a disc g formed with holes h, Fig. 12, causes the nut cZ to rotate, and act successively upon the teeth of the part d, which enter the holes h in disc g, so that it suffices to move the latter by means of a knob ^, 30 to slightly vary the inclination of the rod a, relatively to the truss carrying plate m, and thus ascertain the most suitable position for it, which has never been obtained hitherto by the jerking movements above alluded to. The holes h are sufficiently close to one another that when one of the teeth of nut d has escaped, another shall engage the next hole in its rotary motion. These teeth 35 cause the nut to move forward by degrees the screw which terminates the connecting the rod 5, whereby the rod a is rotated, and yields the effect desired. A third movement, by which a gradual reversing is obtained without any part projecting externally, is shown in Fig. 13, which represents a plan
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