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 . Pegging-Jack, the grain running the width of the strip,and fed to the parts which cut off a peg and thendrive it. In the illustration, the longjack-standard is hingedby a universal joint in the foot-lever, which isweighted at one end to hold the shoe in contact withthe pegging and feeding devices, and at the otherwith a stirrup or foot-rest to disengage
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 . Pegging-Jack, the grain running the width of the strip,and fed to the parts which cut off a peg and thendrive it. In the illustration, the longjack-standard is hingedby a universal joint in the foot-lever, which isweighted at one end to hold the shoe in contact withthe pegging and feeding devices, and at the otherwith a stirrup or foot-rest to disengage the finishedshoe. The jack is capable of lateral and longitudinalmotions upon the standard, to present tlie surfaceof the sole at the point of contact with the pegging-devices in a horizontal plane. The vertical plunger,carrying an awl and a driver, is o]ierated by a cantand gearing. The rotary feed is iminediately backof the peg-gniile, and ojieratid by a pawl andratchet receiving motion from the main gearing inany suitable manner, ordinarily by a cam. The]ieg-strip is fed into the guide from a coil of prac-tically indefinite length and from which a peg is cut PEGGING-MACHINE. 1649 PEGGING-MACHINE. Fig. 3603,. at each fall oftlie driver, bya late nil knife,immediatelybefore beingdriven in to theshoe. The longjack-standardb r i n g .s themeeh anismnear the eye ofthe workman. The two re([-uisite condi-tions are thatthe point ofcontact of theshoe-sole withthe IKgging-devices mustbe the centerof motion ofthe work forthe time be-ing ; and, sec-ondly, the sur-fiice of thesole at thepoint of con-tact with thepegging-ma-chine nuist bekiqit in a hor-izontal plane. In Goddus Pegging-Macfiine. (Fig. 3604), the awl e and peg-driver d are simultane-ously operated by a spring actuating the plunger F, to which they areFig. 3604. both attached. The strip of pegs,placed in a feed-trough /, is ad-vanced by a fol-lower A, an<l is separatedby a flexible knifeiV, which alsoholds it in
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Keywords: ., bookcentury1800, booksubjectin, booksubjectmechanicalengineering
