Brief instructions in the use of the perfect adjuster / by Zimri Hussey ; engravings by N.H. Taylor, Chillicothe, Ohio.

  • Hussey, Zimri.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Brief instructions in the use of the perfect adjuster / by Zimri Hussey ; engravings by N.H. Taylor, Chillicothe, Ohio. Source: Wellcome Collection.

Provider: This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)

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    The double-inclined plane is securely hinged together at the knee. Each half is made of parts that slide upon each other, and are secured by a bolt and screw at any desired point of extension—the extending power being applicable alike to both the upper and lower half. The middle portion of the plane is exhibited by figure 3, illustrating the attachment of the knee fork, and the manner (by dotted lines) of changing it from one to the other half of the double-inclined plane. [ FIGURE III. ] [ FIGURE IV. ] When fastened to the upper half, it is employed to effect extension— when attached to the lower half, to secure a point of counter-extension. The knee fork is delineated in figure 4. When used for extending the limb, it is made fast by bolt and screw, upon the lower end of the upper half of the plane, just above the joint; the base of the horns presenting in the direction of the foot, and the horns themselves at a right- angle with the upper side of the plane. The change, in order to attach it to the lower half of the plane, is sufficiently repre- sented in figure 3, and the man- ner in which it is made available, in effecting extension and counter-extension, is fully presented in the following pages. The mechanical power employed in accomplishing the work of exten- sion is shown in figure 5, and called, in familiar language, the jack. It consists of a brass box, half an inch thick, near an inch wide and nine