Document q3jNjgj5OL5y8mQerveo6rDXK

FILE NAME: Visible Dust (VDT) DATE: 1930 DOC#: VDT001 DOCUMENT DESCRIPTION: Book Excerpt NATIONAL ARCHIVES a n d RECORDS ADMINISTRATION' 1 a ll tu ffihflW th rS 2 p a s e a t s s b a i i ta m e . S r e e i n g ; of ifceaahiTty in toeby ibe Archivai of ibe CoiledStates, i cerarv of*his behili. fcfc&loi'&tf Areisiage/,|^tl Suei. tfc^sihe aasshgfiepr^dttt3Sftf.sjisi ara^ a ss &&a --* 7 tUT Joha t . Burlar n*U _.A*Lscr chie ft Clvtl ttAS^As*OE=>&S SEsOJ'S Ths eB*&a WinaftiLD.C2CM09 H FOH*/.P9 (J ufia-g L 0 c o in enee o f Pulm aaafj JTfefeeia aad other . Pataaasry Affeetioai as A sben* W arier* L Proctjaes gyring s i s co- dual and method* (or !B SSfjrreiSSa c " 8T AND -. E ..R . A MEREWETHEX..M.D. sja.Statoti imi mi- yitotir, - ! ' t R PRICE . K.SLia^sw waBsr a*y*ani LONDON : PRINTED A N I JB U S H E D BY M S MAJESTY'S STATIONERY OFFICE. To be sssftaass! dit - r frasa K..'.STAT10NERY OFFICE *8 M o-iag- rndnatm: A itam i Ho Hainwijf. Lajutee, W.Cjr: laa. Omge Street. Edafaurgh: Ycik 9S=L Mw i iilg ; I, St- Andrewa CisiR, CtrdiK ~ &ra*rE`Wat,. Baifiit.; ay BatadJss.. *93 W-soi [PlCne^.OKLAMv.'AtAj jul' i f m I j SURAUOP m in s; COr |- j Ct_) -F f 0 E jh a : these ri* iis tiiirtk-uhr mlicrc ai utility, and the twettoilri (ftdiittien* sot char adoption arc put ora-ird RCOKJS2JrD A 0S. (li Applica.tiaa e( ffidga Localised Exhinst Venta*tioa fel-proiuctllg p diati proeuiei occasion escape of dost boi controlled b euSloture at e\sr ( . necessary for (a) Suff-ywedsrio mackrtwi. e.g.-- (i) Cmbirig, disintegrating. tensing and other ejKniag machines; sieving machines: fibre grinding machines; dry mlxiejj machine!: rolls fed with dry mirisi*. fil) Carding marhlftg (to suppress do from cylinder and allers, caused By stripping and gndiag, in addition to dial pro duced hy carding): card Side waste rtlu n it machines; tarns* for dry wearing: stripping and grinding machine- other testtk madhjasa, if the s a lt evoked rend this preventive aeasssre rtigarj-. (iii) Sawing, griadinp. trimming, potithing and other abrading raschia, used on dry asbestos predante. (S) Feeding and dcirnrry lattices, or other coaveywi, at machines or other pittar, feed happen at d e m o n ; bagging lotuses, feeding of dry materiel at wet mixing neghine*. (t) Chambers, eoDtaiccra. " cyriane " hopper, at other eurioad m e t into whxt Sberisesd asbesto or misasses containing it art dinted, or pass. (d) Work beacita, e g . for m a itm s ranking, waste toning, () Variola hand operations. e.g., sack emptying and filling, weigh ing, miring. This is tbs principal ausuure hitherto adopted, and is probably that matt generally applieabk. Is has been applied to ama only of the above machines, and applisacss, bet not to hand w ork The methods of applying doe exhaust (frangiti, and other aasoeLiutl factors, are boeanixtg more dfecure. bal there are few fully satisfactory planes. Spedai difficulties tasaaia to be overcame in l sid e coses, e.g.,, t e a , snirisg, raacsre m aris I f not surmo-ated, an alternative, rie., gesesni veutilauoD of a high standard applied so as to drew eby dust-laden air away from (he worker, rivsnld be provided. (2) Sahttiistisa of enclosed ase&s&fesi method! for hand eenreyeaca, aad f &s*Sy feaaA w alk' g'ra^sOlf. This measure-- () avoids depositing material in ebambera, intermediate filling and emptying of sacks or skip*, hand feeding of m u h in a , and other incidental band marie; () permits of find filling and weighing, trader tbs least dusty coadttioas, ef materials for Aitpntcb; (c) rend?? exhaust draught more aSertive, or. in me cases. ub necessary. It is already employed to some extent, and its further application. wherever passible. is greatly to be desired. (3) Eftectiva anelassi* 6 &atl|ffied&afeg n ftfaw and plant. (a) To prevent escape of dust not eoatfoikd by exhaust draught. or (h) tc reader it application more efficient. t (t> suw m utiaa el *! TOei^od* io t dry. To rid o the d#ai giura off ia certain precesse .u,d wcri;. <.g.. a) &considerable amount oi vc w w S fi I manrest safciag, by s-saing the- vers beloro filling. and cy wetting at' Seers and hunches; (t) final sswiag, &ad other saacbin precesse. in aibewos-.-env.-n<tilt lactones. tefaea tie prep&r m aterni has had tim e to cry ; (J) work*' eksESBg. iw daespssg loins aari btacbcs. before Iircsin:-; * JH'BSplBgTisil measure migfcj be adopted to a greater sa te a t than as preti" ? (Sj 30iaiafctie ef Serbia f e s t - p s i s e f e t agpliAfices. C e m ia appUastss are s d ia & few wexis. merinos ^iste a c -sure o: precaution, but which emit much d&JC, difficult or impossible to control bv eficien; eaelosar* or tudwast draught. They should tsfii. be retained unless effectively modified. (a) sapssad doficx brush at aiding machines: (b) card side w u te a ste sst ad iim . ddiver ifig under pressure: (e) c e ru m willeyt and teasers, particubriy old machines. ffi) A basdcsnust of Settling Chambers i s Manufacturing Processes, to the a'SEefs ^ t s ah. (?) EfesSsel ispasaMsa s t m & m sts to prpvasi saaeeesssry s s p o s m is das!. New factor** alsoala b* laid out to as to avoid posing worker* to risk foes p ra e e tta opes which they are eat engaged. In partiesUr. there should bs aeZ&eA separ*sisa of-- <5 opening, carding and weaving, from each, other, and iro n anv other presss*; (S) spinning, doehiiag. pbid&g tuid sim ilar proeencs. from w ent so t sanslag A m ; (e) mattress sealsag. from all ether work: (d) ehuihtsa. containing Sherited asbetwa in bulk, and dusi K illin ' chamber* and apparatus, from any workroam. The sap&rasisa of mattress making should be adopted in Misting work#, and other separation jsfsrred to. as far a* practicable. (!) WU& p ^ g of tes-|a^EsSag maebsam is s e e tssleries sad, at far at jwsctfailsl*, ia ^ g t t s g ^rks. This mearore wonld fating about permanent redaction oi dust css jottacicr. in the sir of the workroom os a whole, aad provide improved cleaning facilities (9} Use of w d s @a etess te sess mntsrtal for SaiaasI work. (1) ffhciwii elMniag spates with vide sse of m>tmm asslhodj. (Sts also {*)) $11) Slcrsgo oi aabcudes s&d other goods to bs outside sre rlssa ss. (13) Eteiswlea of young persons from specially dotty wark. Woes-- Particular preventive measures of a medical statu are referred w in P ari I. wbarc also the limited value of respirators a* a safeguard in this indussrr is briefly discussed. r I t Note uy t f i u e V e m u T M i ^ hIll ^otss exhausthliaa ut cwss&uij dss^i 15^ Ra^ I^wl mfoa 1 loss ire iU -di|aw ami incfficicm*, aifetn. ajtta. ^ . a I ;o a. suffieitei extsai. Von draiiglft m m fwt * M WttW \ i |tSwil &) a t dust-praJ-jciug paiau. or fa y bt wo weak, T te emissien et & sM s usi :; I e'ead at a poini v h a t snr.ttt U applied 1* a clear imlieasio of inadequacy Extensive alteration 01 existing plasm may produce senoivs loss of efficiency Exhaust prorisio tot new machinery and prCKSsacs should, therefore, generally speaking, be made independently. While advantages resale from denting with Bane dust-pnxlncrng jwiiua, by a single egliaast plant, a number of self-coatained plants, with independent fans and settling apparatus. is often more efttetiw Exhaust ventilation applied on a large sabs emails continuous removal of s iaasiclcrsbic volume of air from the room. The supply of sresb air most, be ample or the efficiency of the exhaust ventilation may be reduced. Lu winter, the workers are liable to bring about, this result by closing windows nod doors. Plenum ventilation capable of supplying tire volume extracted, the incoming air being warmed, may therefore be desirable, where extensive exhaust plants are installed. Efficiency of an .wait weattktiojt plant may be greatly redneed by in efficient dsst-ssteliag aelhoth. Each fits ahaald d tssb a rp into an igrbpesirieDi teitter. Settlers adopted in asbestos works include cydaaca, large chambers toniiccted with eyeloitea. large chamfers enclosed with saclring or other filtering material, and bug filters. Cyclones nud chambers are usually wolf separated irons workrooms. Bug Silers are now being commonly adopted, for email lasts!* lotion*. These Blears and ** tallages " are sometimes placed inside workroom, a tad practice, Ths? are best pSaeed in freely remalaied rooms, ettserivelv separated from worfcraaflu. Filtering fabrics for scaling dual gradually become clanged; and m thie effect increase tb i exhaust p lant become* more azui more inefficient, the volume of air moved by the fan being reduced, Such settlers must therefore be kept iltOA. The usual prsetiee is to beat the filtering raainnai. Arrangements for shaking bags from collide, or automatic shaking apparatus are not provided Asbestos d a n does not appear to be so difficult to detach from suitable filtering material as soas dusts, tea assieh dust it p ra k e e d in beating. Efficient shaking arrangesneats, avoiding this espomre, ghonid h* provided if this Method of iettliag is retained. Sob; firms strongly support she view th at it should be gire* up heeimie of the difficulty of tnaiutoinhig the eahsuct p le a t a t the highest efficiency- The matter merit careful consideration. To particular, the rffieioas* ef th* fsh a rst plant should la kept under constant eW rre tia n by a TMpnnjible parscB. Cyclones should be of adequate dtmetwiong. The eofflbismien of chamber and cyclone hi sated extensively, she fas discharging the air into eh* chamber. ui whieh site cysisne inlet is eenaeeted. The efficiency of this arrangement should m an ia pTtieiieaUy O itajit. E. B. A. hETIEW E TH E R . CHAS V f. VV1CZ. 14th March. 1830. )SS :" r <45, \ t t