1806. J 



A^ew Patents latelj/ enrolled. 



2,57 



nearly to a right-antrlo, fo as to introduce 

 a metal phitc as ciole as poliiblc to the 

 liwtiice oC the Air attached to the canvas 

 as defbribed ; the long hah-, now iifually 

 phickcfl, comes in contact anainft the 

 • d-re of the laid pl-itc, whillt a roller, 

 llLidded with dillerent rows or locks of 

 hair, leather, or any other ilcNible or 

 eliiltic matter, which, beinp; driven in the 

 lame direction with the fur, etl'eclually 

 bruliies, fcrajics, or I'eparutcs, the long 

 hair cut from the Ikin, fiom fiio fur, by 

 prelllng it a^ainll the edge of the plate, 

 ^vhenec ]t ii> conveyed into the trough, 

 and prevented from falling or mixing with 

 the fur again. 



To lliengthen the faid Ikins, and pre- 

 vent the jjoliibility of delay in cafe the 

 pelts being cut, the Ikins, previoully to 

 cutting, are fixed on a lirong canvas 

 ciotli, covered with a cement conipofed 

 ot wax, roiiu, grcafe, and a little ochre, 

 or fome other fuch adhefivo matters. Jn 

 lome cafes llie fur is too ihort to be fe- 

 parated by the machine : tlien the extre- 

 mity of the (kin is fixed to or between 

 rollers, fo as to draw it over a roller with 

 a fecond very finall roller in front of the 

 Ikii), whilft a third larger roller, relem- 

 bling a v\ orm, or quick Hat thrcad-fcrcw, 

 when viewed in its longitudinal direction, 

 moves with a greater velocity in a con- 

 trary direction to the fkin, wheieby a 

 j)ortion of the long hair is caught each 

 revolution, and jannned between a part 

 of the worm or thread and the fame 

 roller in front of the ikin, is thereby 

 j)lucked out of the Ikin. 



The patentee further adds, that hi? 

 kuives form an important part of his in- 

 vention, being made of the bell hardened 

 tempered llecl, which is tinted, grooved 

 or toothed on the faced lide, i'o that when 

 ground for ufe on the oppofite furface, it 

 <ibtains an edge limilar to a very tine 

 law, and, lieing pnnci[)ally made circu- 

 lar, p(jii'elVes a two-fold advantage ; that 

 is, — 1. It turns on its axis againlt its 

 Work, aufi thereby produces a drawing- 

 flroke with a much gn-atcr velocity than 

 would be produced witlunit rotation. — 

 '2. The whole external line conliitutint; 

 ttie circulitr edge of the knife coming 

 tii(cclii\elv in contaiH with the Ikin, it is 

 found to k( ( [) its edge at leal! twelve 

 times as long as the prel'ent knives, 

 which are made of malleable iron, for 

 the purjjofe of prefervini: a rough edsie, 

 that being found to anl'w(;r the purpofe of 

 cutting belter than a iinooth one ; :uul 

 Uiis eli'ecr is produced in Ihefe knives by 



Mo.Miu.v Mau-, No. M8. 



the fluting, with a very great faving of 

 labour and time. 



MF.SSRS. HORSON cV CO., (siIEl- FIELD,) for 



a Melhod of S/ietit/iing Ships, lioojiiig 

 Hoiijcs, unci Liiii/ig \Viittr-S]/out!:, 

 Tiifli a Malciiulnot heretofore ufcdfor 

 thofc Purpulis. 



The material made ufc of for the pur- 

 potL's fpecitied, is zinc call into ingots of 

 any convenient lizc, lliape, or figure; at- 

 ler which the fame is to be rolled be- 

 tween njlk'i-s, fo as to convert it into 

 plates of any required thicknefs : but, to 

 prevent the zinc from cracking under the 

 rollers, it mutt be heated to between 

 20U° and CMiP of I'alr.enheit, and kept 

 at that heat till the metal is reduced to 

 oiie-tinirth of its original thickiiel's ; af- 

 ter which it may be rolled to the thick- 

 ncfs recpiired witlput further heating. 

 After this procefs tjie plates are found to 

 be very hard, and dithcult to be bent or 

 worked : tiiev nmll then bo annealed hy 

 again heating them to the foregoing tem- 

 perature, and the plates will then polfets 

 the tenacity and flexibility )-equired for 

 theathing nii|is, roofmi; houfcs, and lining 

 of water-fpouts. The iheets of zinc, in 

 this Hate, may he cut, bored, punched, 

 or perforated, like copper, and may be 

 fatlened with iron nails to tliips having 

 the ufiial tree-nails, bolts, or fattenings, 

 but not of copper, or the nails may be 

 of iron coated with zinc or tui. 



The patentees add, that the befl gene- 

 ral rule for applying metals as faflenings 

 for zinc theathing, is to take tliat metal 

 " hicli is nearelt in that power which che- 

 mifis call Gahinifm to zinc itfelf, and 

 caufes the leall quantity of oxidation, 

 when made with it into .i galvanic pile. 

 Iron and tin are metals of this defcrip- 

 tion ; and thofe metids are to be prefer- 

 red, of which a piece laid in falt-watcr, 

 in contact with a piece of zinc, is found 

 to produce the fmalletl change in the 

 zinc in any given time. The lame me- 

 thod may be taken in rooting houfes and 

 lining fpouts, hut the fame thing may be 

 done by folder compofed of tin and zinc, 

 or of tin and lead, limilar to that ufed by 

 plumbers, under the name of foft folder. 



MR. wn.i.iAvr Sampson's, (rivF.npooL,) 

 for Improvements in the App/icuiion of 

 PoHcr emploi/cd inechnnicully, efpeci- 

 (i//i/ as adapted to the Ufe of Crunkl 

 md Fly-Wheeh, !)C. 

 1 ho improvenients defcribed in this 

 ipecification conhil in the divilion of aoy 

 Kk power 



