ISOG.] 



New Patents lately enrolled. 



5,7» 



fuel, and whence it communicates with tuial to falling bodies, producing a gen- 

 tle motion of the weight, free from all 

 danger of piecipitatiou, and fubject at 

 ail times to be anciled with eafe aiul cer- 

 tainty by the gripe wheel. The rope, af- 

 ter being detached from the weight low- 

 ered, is brought up again by a futhcient 



the chminey. 



MK. DAVID nAiiDiii's (westminstfr), /yr 

 an Improvement in and upon Cruntsjor 

 ruijing end lowering Croods into and 

 out of Wurehoui'is. 



The principle of the raifuig apparatus counterpoife weight attached to the back 

 is to conftitute the force employed, loiiie- rope which had been wound upon the 



times by the v\hole weiglit ot' tlie perfoii 

 or perlons working it, I'umctimes M-ith 

 the addition to tins of their nmfcular 

 itrength ; and alio to oblige each perfon, 

 where more than one is employed, to 

 perform his due (hare of labour, not af- 

 fording an oppfirtunity for the appear- 

 ances of excitioii without the reality. 



ban- 1, as the rope deicended. Thus the 

 operation of lowering can be performed 

 by only the attendance of one man to 

 the crane ; combining at once difpatch, 

 a great laving of labour, and perfefct lie* 

 curity from all danger to ra€n or goods. 



Another mode of applying water for 

 the jjurpofe of lowering weights may be 



and forming an eiiicicnt coinbiiiation of elfected by putting the crank upon the 

 their refpeClive efforts. The principle of axis initead of the fpokcj?, and attaching 

 the lowering apparatus contifts in apply- to this crank a pifioii, \vtiich by the mo- 

 ing a convenient quantity of water, to tioii of the ciank is moved up and down 

 counteract the accelerating velocity na- in a box or cylinder hlled with water, 

 tural to falling bodies, fo that the weight both ends of the cylinder being covered, 

 lowering Ihall on no occalioii dcfecnd and the piuon-rod moving through a 

 with precipitation, but with a gentle mo- ftuifing-box in the upper cover. An ap- 

 tion, at ail time; to be ealily arrelicd by paratus, regulated by means of a cock, 

 the common gripc-whecl : both principles being made in the pifton, the water is 

 being attended with difpatch of bulinefs, obliged to pals through the aperture as 

 faving of labour, and prevention of the pifton moves up and down, and th<j 

 dangerous accidents. The crane is com- velocity with which the pillon can move 

 pofed of three principal parts : 1. A will be in proportion to the fize of the 

 tread wheel, lefs than half tlie hze of the aperture. The upper cover of the cylin- 

 walking wheel in common ufe, and of a der may be formed into a refervoir round 

 difterent conftructioii with regard to the the fiuthng-box, to receive the fmaliquan- 

 lleps, which are outlldc initead of within tity of water that may be forced through 

 the circumference of the wheel. '2. The it. This liquid may again be cafily intro- 

 barrel on which is coiled the rope that is duced into the cylinder, by means of a 

 connected with the weight to be raifed or cock, through the bottom of the refer- 

 lowered. 3. The lowering wheel con- voir, and this cock may alfo ferve as an 

 tained in a box or ciftern. opening to introduce an iulirumcnt to re- 

 Thc manner of uilng this crane, when gulate the cock in the pilton when occa- 

 thc goods are to be railed, is to connect lion requires, without being under the 

 the tread-well with the barrel : a nam- neceflity of taking olf the upper cover of 

 her of men are to mount th.e fieps, and the cylinder for that purpoiie. When the 

 laying hold with th.eir hands of the rails lowering apparatus is ufed for tlie purpofe 

 fadencd to tlie top of the framing of the of lowering goods or perfons from a build- 

 crane, and prdjccting at a conver.icnt ing in cafe of fire, it will be prjper to 

 height on caci; fide of the men, they are attach two ropes or chains to the barreJ, 

 enabled on all occafions to maintain their winding in contrary directions, in order 

 jiropcr lituations on the wliecl, and by that the defcent of one weight bv one 



their weiglit alone, or their weight and 

 muffular llrcngth combined, raife the 

 weight. When w<iglits are to be lower- 

 ed, the tre:id-v\hcil is to be dil'i.'onnecied 

 from the barrel. . Tiie click and ratchet 

 wheel will connefl the lowering wheel to 

 the barrel, and the defceudlng weight 

 will nccelVarily carry round the wheel ; 

 tiie arras of which alternately llriking on 

 the fnrfacc of the water in the ciftern, 



rope may wind up the other, to be ia 

 readinefs to continue tlie operation. 



MR. BUYAN DONKO's and MR. lIF.XnY 

 MAUNDSr-AY's(MARGAIlET-STREET), /C^r 



a new and fimplc Met /tod of combining 

 IV/iccl-ziork, fo as to produce am/ re- 

 quircd Proportion of Velocity heiwee.n 

 the Weiii,tit and the'firjl Mover. 

 The nature pf this invention cannot 



and forciu" their palfagc through it, will be fet fujth without the aid of iigures, 

 Wpuntciiict the avitcknitinjj velocity nu- It wUl therefore be fuihcient if v\c inform 



y B 2 our 



