Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . r, like the humankniC. A logglc-joi/it. See Toggle. Knee-joint Press. One in which power is ap-jdied by means of a double knee-joint articulated atthe top to the upright framework, and at the bot-tom to a cross-heail, from which proceeds the shaftwhich applies the force, and whii/h works through aguide. At the junction of the branches the articula-tions are made
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . r, like the humankniC. A logglc-joi/it. See Toggle. Knee-joint Press. One in which power is ap-jdied by means of a double knee-joint articulated atthe top to the upright framework, and at the bot-tom to a cross-heail, from which proceeds the shaftwhich applies the force, and whii/h works through aguide. At the junction of the branches the articula-tions are made with masses of metal forming screw-nuts, through which passes a horizontal screw, right-handed for one half its length, and left-handed for theother half. This screw is operated at first by meansof a set of crank-handles at one end of it; and whenthe resistance becomes very great, by means of acounterpoised ratchet lever, which is shown in themiddle of the frame. The foice applied in this wayis very great, since the operator can act on the leverwith jiis wliole weight. Knee-stop. (Music.) A lever operated by theknee to work the swell of a caliinet organ. Knee-sTwell. (^fnsie.) An arrangement in an KNIFE. 1232 KNIFE. Fig. Fig. 2762. Knee-joint Pn»s. organ by which a greater or lesser amount of windmay be turned on to the reeds to vary the loudnessof tlie tone. Knife. 1. A cutting - implement having ablade sharpened on the edge, and distinguishablefrom a sword, a colter, and other things, by its formand uses. The earliest forms of knives are made of flints(a, 6, «,/, (I, Fig. 2762), and after the introduction ofbronze (c) they were still retained for the perform-ance of religious observances. This is shown bythe use of a sharp stone in performing the oijer-ation of circumcision, as recorded in iv. 25,where Zipporah operated upon her child in conform-ity to the .lewish law. Herodotus says that an Ethi-opic stone was used for making the incision in thebody of pers
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