Woodworking Machinery: Its Rise, Progress, and Construction, with Hints on ... by Manfred Powis Bale

Author:Manfred Powis Bale
Language: eng
Format: epub
Publisher: Crosby Lockwood and son
Published: 1894-03-25T05:00:00+00:00

a light planing machine. The face of the dram on which the sand paper is fixed shonld be covered with i|^ some moderately flexible material, and the drum should

^^ be adjustable vertically to vary the amount of the

j^ cutting action of the sand paper.

Aj, For turning broom handles and such like cylindrical

rods several machines are in use, varying chiefly in the arrangement and shape of their cutting tools. For rounding purposes a hollow mandrel is usually employed, into which hollow chucks arranged with knives are fltted; these chucks vary in their bore according to the sizes required. The wood to be rounded is either pushed through the chuck and mandrel by hand or by the aid of self-acting feeding gear. One patented by Messrs. C. B. Sogers and Co., of Norwich, U.S.A., and shown at the International Exhibition in Paris, 1878, is somewhat novel. It is self-feeding, but does away entirely '^ " with feeding gear, the cutters being arranged in the

^\ hollow mandrel through which the wood passes in such

a manner that a kind of screw feed is given, which, after the cutters first strike the wood, pulls it through lefl^ without extraneous aid. The mandrel is speeded to

r^^*" make 3,000 revolutions per minute.

^ ^ A very ingenious machine for turning oars was in-

'^'' vented and patented by one Ezekiel Page, an American,

be*^ in the year 1842, by which he was enabled to shape

be *^!^ two oars out of a piece of wood where one only before

of ^ had been obtained, the remainder being cut to waste.

jjdp^ Our space, however, unfortunately forbids an extended

pb^ notice. About the year 1855 a machine for dressing

5 p^' oars on Steele's patent was erected at the Royal

ts.

rtick

Dockyard at Chatham. The wood was first roughed out by two sets of circular saws mounted upon swivelling cylinders, arranged to turn on their centres, whilst a sliding bed allowed them to advance or retire from each other by the action of an adjustable ^ feeler bar' or tracer. After the wood passed through this machine it had the general outline of an oar, but with rectangular section; it was then passed to a finishing machine, when the loom and blade were finished simultaneously by two sets of cutters.

Mr. G. L. Molesworth, in his paper read in 1857 before the Institute of Civil Engineers, mentions several machines for sawing curved ship's timbers, including one invented by a Mr. Hamilton, of the United States, and another by M. Normand, of Havre. In Mr. Hamilton's machine two straight saw-blades were attached to buckles arranged to turn on their centres whilst in motion. These saws were mounted in swing frames formed of hollow wrought-ironbars, to combine strength with lightness. In one large or external swing frame two internal swing frames were arranged, with a transverse sliding motion along the external swing frame. Each of the saws which were mounted in the internal swing frames were turned on their centres, and guided by the workman to any line marked out on the timber by a forked lever of wood applied to the back of the saw.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.