sawl (sa)

[ IMG:content-0177.png:[merged small][merged small][ocr errors] a, circular saw (right-hand and left-hand saws have the teeth running in opposite directions); b, section of circular saw showing flange atc, d, concave saw; e, circular saw with inserted teeth; /, mill 5360 ing in the plate interdental spaces or gullets. In saws of large size inserted or removable teeth are now much used. Small saws are generally provided with a single handle of hard wood; larger saws, for use by two workmen, have a handle at each end. Reciprocating saws more generally have their teeth inclined toward the direction of their cutting-stroke (see rake3, n., 1), but some cut in both directions equally. To cut freely, saws must have, for most purposes, what is called set -that is, alternate teeth must be made to project somewhat laterally and uniformly from opposite sides of the saw in order that the kerf or saw-cut may be somewhat wider than the thickne of the sawblade. This prevents undue friction of the sides of the blade against the sides of the kerf. Some saws, however, as surgeons' saws, hack-saws, etc., have little or no set, and undue friction against the kerf is prevented by making the blades of gradually decreasing thickne from the edge toward the back. 2. A saw-blade together with the handles or frame to which the blade is attached, as a handsaw, wood-saw, or hack-saw.-3. In zoöl. and compar.an at., a serrated formation or organ, or a serrated arrangement of parts of formations or organs. (a) The set of teeth of a merganser, as Mergus serr at or. (b) The serrate tomial edges of the beak of any bird. See sawbill, serrati rostrate. (c) The long flat serrate or dentate snout of the saw-fish. See cut under Pristis. (d) The ovipositor of a saw-fly ( Tenthre dinide). 4. A sawing-machine, as a scroll-saw or jig-saw. -5. The act of sawing or see-sawing; specifically, in whist [U. S.], same as see - saw, 3 ( b ). Annular saw. ( a ) A saw having the form of a hollow cylin der or tube, with teeth formed on the end, and projecting parallel to the longitudinal axis of the cylinder, around which axis the saw is rotated when in use. Also called barrel-saw, crown-saw, cylinder- saw, drum - saw, ring-saw, spherical saw, and tub - saw. See cut under crown -saw. (b) In surg., a trephine. - Brier-tooth saw, a saw gulleted deeply between the teeth, the gullets being shaped in a manner which gives the teeth a curvature resembling somewhat the prickles of briers (whence the name). This form of tooth is chiefly used in circular saws, rarely or never in By Caine Abel was slaine,... by Achab Micheas was imprisoned, by Zedechias Esaias was sawen . Guevara, Letters (tr. by Hellowes, 1577), p. 90. Probably each pillar [of the temple] was sawn into two parts; they are of the most beautiful granite, in large spots, and finely polished. Pococke , Description of the East, II. i. 108. 2. To form by cutting with a saw: as, to sau boards or planks (that is, to saw timber into boards or planks). - 3. To cut or cleave as with the motion of a saw. Do not saw the air too much with your hand, thus, but use all gently. Shak ., Hamlet, iii. 2. 5. 4. In bookbinding, to score or cut lightly through the folded edges of, as the gathered sections of a book, in four or five equidistant spaces. The stout bands which connect the book to its covers are sunk in the saw-track, and the sewing-thread which holds the leaves together is bound around these bands. II. in trans. 1. To use a saw; practise the use of a saw; cut with a saw.-2. To be cut with a saw: as, the timber saws smoothly. - Sawing in, in bookbinding , the operation of making four or more shallow cro saw-cuts in the back of the gathered sections of a book, in which cuts the binding cord or thread is placed. saw2 (sa), n. [ Leue lord & ludes lesten to mi sawes ! William of Palerne (E. E. T. S.), L. 1439. So what for o thynge and for other, swete, I shal hym so enchaunten with my sawes That right in hevene his soul is, shal he mete. Chaucer , Troilus, iv. 1395. I will be subgett nyght & day as me well awe, To serue my lord Jesu to paye in dede & sawe . York Plays , p. 174. 2. A proverbial saying; maxim; proverb. On Salomones sawes selden thow biholdest. reciprocating saws. Also called gullet-saw. - Butcher's saw [named after R. G. Butcher, a Dublin surgeon), a narrow-bladed saw set in a frame so that it can be fastened at any angle: used in resections. — Circular saw, a saw made of a circular plate or disk with a toothed edge, either formed integrally with the plate, or made by inserting removable teeth, the latter being now the most approved method for teeth of large lumber-cutting saws. Circular saws are very extensively used for manufacturing lumber, and their cutting power is enormous, some of them being over 7 feet in diameter, running with a circumferential velocity of 9,000 feet and cutting at the rate of 200 feet of kerf per minute. From the nature of this cla of saws, they are exclusively used in sawing-machines. These 3t. A tale; story; recital. Compare saga. machines, for small saws, are often driven by foot or hand power, but more generally by steam-, water-, or animal power. Plain circular saws can cut only rectilinear kerfs, but some circular saws have a dished or concavoconvex form, by which curved shapes corresponding with the shape of the saw may be cut. See cut under rim-saw. Comb-cutters' saw. Same as comb - saw. Cro -cut saw. ( a ) A saw adapted by its filing and setting to cut acro the grain. The teeth are filed to act more nearly like knife-points than those of rip-saws, which act more like chisels. Cro -cutsaws have set than rip-saws. Particularly, a saw used by lumbermen for cutting logs Piers Plowman (B), vii. 137. The justice,... Full of wise saws and modern instances. Shak., As you Like it, ii. 7. 156. Now cease wee the sawe of this seg sterne. A lisa under of Macedoine (E. E. T. S.), 1. 452. 41. A decree. A! myghtfull God, here is it sene, Thou will fulfille thi forward right, And all thi sawes thou will maynteyne. York Plays , p. 504. So love is Lord of all the world by right, And rules the creatures by his powrfull saw . Spenser, Colin Clout, 1. 884. =Syn. 2. Axiom, Maxim, etc. See aphorism. from tree-trunks, having an edge slightly convex in the cutting-plane, a handle at each end projecting from and saw3 (sa). Preterit of seel. at right angles with the back in the plane of the blade, and saw4 (sa), n. A Scotch form of salvel. teeth filed so that the saw cuts when drawn in either A' doctor's saws and whittles. Burns , Death and Dr. Hornbook. direction. It is operated by two workmen, one at each handle. - Double saw, two parallel saw-blades work- ing together at a specific distance from each other, sawara, n. See Retinospora . and in cutting leaving a piece of specific thickne be- tween their kerfs. - Endle saw. Same as band - saw . saw-arbor (sa'är bor), n. The shaft, arbor, or - Equalizing saw, a pair of circular saws placed on a mandrel and set at any desired distance apart by a gage: used for squaring off the of boards, etc. - Hack-saw, a small stout frame-saw with little set, close act and well tempered: used for sawing metal, as in cutting off bolts, nicking heads of hand-made screws, etc. - Half-back saw, a hand-saw the back of which is stiffened to a distance of half the length of the blade from the handle.Half-rip saw, a hand-saw without a back, and having a width of set intermediate between that of a cro -cut saw and that of a rip-saw. - Hey's saw, a small two-edged saw set in a short handle: one edge is straight, the other convex. It is used in removing pieces of from the skull. Intero eous saw. See intero eous. - Perforated saw, a saw having a series of perforations behind the teeth.-Pitch of a saw. See pitch1.-Pit frame saw, a double frame-saw, worked by hand, to the frame of which are attached upper and lower cro -handles analogous to those used on the ordinary pit-saw. Railway cut-off saw, a circular saw or buzz-saw supported on its frame upon a carriage moving on a track, so that it can be fed backward and forward to its work. - Reversible saw, a straight-edged saw having both edges armed with teeth, so that cutting can be done with either edge, at will, by reversing the saw. - Smith's saw, a hack-saw. To be held at the long sawt, to be kept in suspense. Between the one and the other he was held at the long saw above a month. North , Life of Lord Guilford, i. 148. ( Davies .) (See also back - saw, band - saw, belt - saw, buzz -saw, center- saw, chain-saw, fret-saw, gang -saw, gig -saw, ice-saw, jig -saw, rabbet-saw, ring - saw, etc.) sawl (sa), v.; pret. sawed, pp. sawed or sawn, ppr. sawing. [ mandrel upon which a circular, annular, or ring saw is fastened and rotated. Also called saw - shaft, saw - spindle, and saw - mandrel. sawarra-nut (sa-war'a-nut), n. Same as souari-nut.