298
Class 6.—MANUFACTURING- MACHINES AND TOOLS.
North Areas A. B. 10 to 31; C. D. E. 1 to 10, & 19 to 33 ; G. H. 25, 26.
[United
but which may be instantly removed by again admittingthe air. The plan in general use for holding downsheets of glass is to imbed them in plaster of Paris,which operation has to be performed four times for eachplate, and which, in some establishments, consumes40 tons of plaster per week. Patented and manufacturedby the exhibitor.
An improvement on the centrifugal machine for sepa-rating molasses from crystals of sugar. The peculiarityof this machine consists in the mode of driving it by apair of emissive arms on the same axis as the centrifugaldrum, thereby dispensing with the upper driving gear,and also in making the centrifugal drum to lift on and offthe machines, so that the operator removes the charge offinished sugar from one drum and recharges it withmatter to be operated upon while the other drum is inuse upon the machine ; by which arrangement one manwith this machine can operate upon as much material as jtwo men and two of the original machines were capableof doing. Patented by the exhibitor. Proprietors,Messrs. Rotch & Finzel, 2 Furnival’s Inn, London .
401 Furness, William, Liverpool— Patentee.
Patent machines for working in wood. Power mortisingmachine, stated to be simple in adjustment and operation,and self-acting in its half-rotary reverse motion, whichchanges the face of the chisel.
Foot mortising machine: to be used with any size ofchisel, from an eighth of an inch to two inches; the pe-culiar form of the chisel enables it to hold the cone andlift it out of the mortice at each return stroke.
Tenoning machine: to be worked either by hand orsteam power. The tenon is finished at one operation,without gauging or setting out the work.
The annexed cut represents this machine.
Furness’s Patent Tenoning Machine.
Planing machine: adapted for squaring up hard or softwood, from four to fifty feet in length, from eight to fortyinches in width, and from one quarter of an inch to thirtyinches in thickness.
Moulding machine. Any description of joiners’ mould-ings can be cut by this machine with great rapidity, andin such an accurate manner as not to require the use ofany other tool. It is equally useful in sash-sticking,either in hard or soft wood. Its construction is simple,and is easily kept in order.
402 Schiele, C., Manchester —Inventor andManufacturer.
Specimens of the construction of revolving rubbingsurfaces by a patent rule which determines the formbest adapted to reduce friction to a minimum under any
given strain. ■ Form for a strain in the direction of theaxis.
The preceding figures are intended to represent variousapplications of the peculiar form for rubbing surfaces.The lower figure represents this form.
Portable grinding-mill, driven by Lloyd’s steam-engine,with the exhibitor’s condensor attached, and with therubbing surfaces formed according to the patent rule.
A similar mill, fitted as a handmill. •
Four-and-a-half-inch cock.
Spindle-joint, used on locomotive regulators, instead ofstuffing-box. l|-inch stop-cock, with pump-valve at-tached. Steam whistle.
Glass water-gauges: in which the packing is tightenedby direct pressure without any twisting strain on theglass. Gauge-cock.
Self-acting feed regulator for a ten-horse power boilerwith curved surfaces.
Fire-cock, with stand pipe.
Glass taps for acids, filters, &c. Lathe spindle.
Samples of screws and nuts.
Instruments for describing the curves required in tnconstruction of the foregoing articles. Equation anformulas relative to the antifriction curve.
Ventilator for exhaustion or compression.
403 Fairbairn, W., & Sons, Manchester — Inventoisand Manufacturers. _
Specimens of corn-mill work:—Improvements inmanner of driving, in' the means employed for adjus i ^and regulating the grinding-stones, and in the meansfeeding.
404 Crosskill, William, Iron Works, Beverley -~“Patentee and Manufacturer.
Patent mills for grinding vegetable substances.consist of,—mills for steam, of two and four horse p° ^for grinding broken bones into fine powder, at t eof about 25 bushels per hour, suited for fine naa11