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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
ured by plates to these parts, and rigidly held at a distance from the back. Sweeney's knapsack. Baxter's knapsack sling. Baxter, March 17, 1863. This improvement is intended to prevent the pressure of the knapsack upon the small of the back and the cramping of the movement of the arms, and it consists in supporting the sack by strips of wood extending from the shoulder to the hips; also in securing the chest-straps so as to leave the arms free. Short's knapsack. short, January 28, 1862; December 14, 1862. The mode of slinging the knapsack permits it to be loosened so as to fall away from the shoulders and spine of the wearer, as a means of shifting the weight and pressure, and allowing circulation of air against the back of the person. The arrangement also permits it to be raised or lowered in a vertical line according to the convenience of the soldier. The neck and shoulder strap is connected to the upper part of the knapsack by intermediate straps, and the lower