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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    and a half inches long. Near the left end of this box or case is a semi- circular projection containing a pinion-wheel, with teeth matching those in an iron rack bar—the latter running the entire length of the case. The shaft of the pinion-wheel projects without the case on one side, and holds upon it a ratchet-wheel, into the teeth of which the point of a catch is made to drop by the pressure of a spring. From the right hand end of the box, and the left end of the rack bar, square projections will be found three-eighths of an inch long. These projections fit into cor- responding openings in the sides of the double-inclined planes, both above and below their joints. Should you wish to make extension upon the upper half of the plane, lay the brass case directly along and against its side, with the projections fitting into the openings made to receive [FIGURE v.] them; place the lever upon the square end of the shaft protruding from the ratchet-wheel—see that the bolt passing through the slot in the movable portion of this half of the plane is slack—turn the end of the lever round to the right, and the plane will be lengthened. In the bulbous end of the lever will be found a square opening, used for unscrewing the head of the pin passing through the hinges that con- nect the two halves of the plane. The Perfect Adjuster, in its double form (figure 1), with all necessary appendages, is securely packed in a neat box, nineteen inches long, nine and a half inches wide and fifteen inches deep, and weighs, including box, thirty-four pounds. The Adjuster in the single form (figure 2) with the extending power, cushions, straps and all the fixtures belonging, is furnished in a box seventeen inches long, nine and a half inches wide, and less than four inches thick; all weighing twelve pounds.