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 . Ral-Trap. The pins are disen;;aged from the animals body andthe trap reset by the onward movement of the shaft/, which continues its revolution until the snail eagain engages tlie stop. Fig. 4187 consists of a box having a hinged opentop and a cistern below. The bait is protected by awire guard having an opening in the middle largeenough to admit the animals muz
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 . Ral-Trap. The pins are disen;;aged from the animals body andthe trap reset by the onward movement of the shaft/, which continues its revolution until the snail eagain engages tlie stop. Fig. 4187 consists of a box having a hinged opentop and a cistern below. The bait is protected by awire guard having an opening in the middle largeenough to admit the animals muzzle. On seizing tliebait a catch is released, allowing the pivoted plat-form to partially rotate by the animals weight and Fig. Ral-D-ap. drop liim in the cistern below, when the depressedend again rises and the catching device is re-engaged,holding the platform in position until displaced byanother nibble. See also Animal-trap. Rave. {Vehicle.) One of the side pieces of awagon-body frame or of a sleigh. Rave-hook. {Nautical.) A hooked iron forclearing old oakum out of the seams. Ravel. {Weaving.) A comb-like iustramentbetween whose teeth the yarn-threads are passedwhen being distributed upon the beam of the ravel has a length equal to tlie width of theweb, and maintains the order which the threads ac-quire in the warpiny-mill. A separator. The ravel is also used in winding yarns from ballsor hanks on to a balloon. Rave-lin. {Fortification.) A detached workhaving a parapet and ditch forming a salient anglein front of the curtain. It is erected upon the coun-terscaiy, and receives flank defense from the body ofthe place. Inside the ravelin may be a rcdoiiit and ditch ;the gorge is unprotected, and the
Size: 1364px × 1832px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectin, booksubjectmechanicalengineering
