The Times from London, Greater London, England • Page 19

wtttetf ENGINEERING SUPPLEMENT. X. 3o9. (Eighth Yew.) LONDON, WEDNESDAY, JANUARY 10, 1912; Xasoed Weekly with imt9 pULLER, HORSEY, SONS, CASSELL, inare, 100, Kinr Mrect, V. K.C..

and MANCHESTER, speciality of the Sale and Valuation of n.uVh. AltEHOCSES, PLANT, aud MACHINERY. kins to ITItCIIASK or KENT MANU s. PROPERTY of any description. In country, can oMain.

on application, a. it PRINTED REGISTER, which contain .411 th i Works, harvcs, etc. it Junction Works, CONTENTS. ARTICLES Euscnuc Ahsltotq New Telephone Excha.vgk Hon Linux Diesel Em owes NOTES INDLOTRV AND INVENTION MOTOR CAR ENGINEERING NEWS OF THE WEEK' Scotland The New SunMEnsmut YoBKSHlnE ENGIKEEniNO AXD TAXES Iaxc asbiee a.nchesteb Waterworks Tub Midlaxms Wobcbeteb Sxwacb Works Eamteex Cocwm: Pollution of the The Socth Coast: Coast Defence WOEK PRESSES Belgium Oil Propelled Fisbtxo Boat Sheet Metals, etc. LajS i TAYLOR CHALLEN, Ld.

Cosstitttloa HLD, BIRMINGHAM, I THE TIMES ENGINEEBINO CONTRACT LIST CORRESPONDENCE HARDY JL HIGH MINERS' SPEWED DRILL STEEL. STEEL CRUCIBLE CAST STEEL. OI all grades and for Tfit HASDY mm PICK Lte. saeTlttla. faflaeA mmm SUCTIOIM hos FLUSHING HOSE, BELT ING, PACKING RINGS, STEAM AND PUMP VALVES Fitted with Patent Anchor Bush.

coke as a Domestic Fcel 19 PARAGRAPHS 20, 51, 22 INDEX TO ADVERTISEMENTS. Sgtyfr is IaHS fjornan. loom Mb Co. Tender 51 Drralele and On. 20 Thorn.

John N. ijui. 20 so FrT.andfte.. wl2S.UJ aftf. Col IS UArfrruantrtefc it Yorkshire Copper Works SZ OIL GAS.

I Oil gas has found its only extended application in the lighting of railway carriages. The method by which it is usually made is probably one of the crudest and most uneconomical SUPERHEATERS AND EVAPORATORS H. A. HARVEY Norfolk House, Laurence Pountney Hill, E.C. HUMBOLDT a House.

Lloyd's At. STEAM TURBINES CEMENT MAKING MACHINERY ORE COAL MINING MACHINERY to nay, 8,100 beat units out of a are made available for illumina making, being wasted in the process of manufacture. This large, loss is due to the excessive formation of tar. hard carbon on the retort walk, and other products of little or no value. not possible by any known ucoccas It i vert oil completely i vaiue, but on the other hand it is easy vert 60 per cent, of it into gas without the pro gas tor." Ac.

There are now ore which enable a large proportion of the Pintach zas. the unconverted oil beinz re covered as a valuable by product free from cone, etc. I be richer gas used to act Detects rx Plant. Tar and coke are formed when oil is allowed trickle or flow slowly over heated surfaces the Pintsch process, that to say, when allowed The retorts system of firing, and to extreme local eating their hie is abort, renresentins an output of only 150,000 cu. ft.

of gas. They pon the firebrick, causing rapid deteriora he setting, and in renewing them it is practical! to renew the setting. They are placed horizontally, and the unsup in the middle, another factor which materiallv tenance cliarges of an oil gas works are duo to retort and retort setting renewals, the other jwm oi me piants, aitnouen comprising or less out of date compressors, boilers. pressing ou gas by the rintsch process is, works of averasre size, about 1 Is. ner 1 .000 ci aeouctine for compression, sav 8a.

for the actual manufacture. A Ho wine for the fact about 50 per cent, more heat ELECTRIC SMELTING. SOME EXPERIMENTS IX ENGLAND. Electric furnace processes are steadily making caaway In this conn try. though the 1,000, of the latter.

ITS MANUFACTURE AND USE. Oil gas has found its only extended applica in the lighting of railway carriage. The method by which it is usually made is probably of the crudest and most uneconomical industrial processes of the present day, and had 1,000, render it peculiarly suitable to railway require merits, oil gas must long ago have been aban doned. For more than 25 years it has served as the principal railway carriage Uluminant, and still used on the larger number of trains run ning this country. It is not easy to say how much is consumed in this way, but 500 million ft.

is probably a moderate estimate, repre nting a manufacturing cost of about 250,000 annum, in Great Britain alone. In Germany le of the railway systems uses no less than 160 million cu. ft. every year, and its adoption the United States is being widely extended, chief advantages for train lightine are its with the addil the small capital cost of a carriage installation forniod woud pared with an electrical equipment, and i firebrick: The its high calorific and Uluminatuie value horizontal sell ipared with coal gas a carriage cliarged the life of tin can he run several hundreds advantages in which a pecuniary valu tli all reservation. conditions, the different be reelected.

On th of the tar and of the inflammable condensate from the gases, known Possible Improvements. Of the various expenses connected with this tremelv high, amounting; to about per 1,000. In a works turning out 8,000,000 it. oi gas per annum tne cost oi renewing ana tneir settings approximates to it was 1884. With retorts construct placed, and worked as at present, it is i easy to see how any improvement is to be made, rcadicai alteration, practieally an entire change of the system, is the only remedy which would materially modify this excessive charge.

Conference with railway authorities has phown they know that the continual scrapping of the cast iron retorts and their settings is the chief factor which militates aeninst the economic manufacture of oil gas, and unless the system is completely changed this scrapping will go on until the process itself is scrapped, once and for all. The adopti employ it for this purpose. II tne looked into more closely, however, it tha objection is not so serious as it is generally tacucrnt to be. A great many powi in a position to offer power, with a high and constant iosd factor, at rate so low as O.ld. per kw.

boni eTcrsi other factors play so important a. role i question that if power is available at such a I other general miseonception, that the art of electric smelting still bo much in its infancy that success is problematic, no longer holds good in practice. The Sheltlvo or Tor. Within the last year or so a trial smelting plant has been erected in Cornwall for the redaction of tin ores on a scale not uraal for this class of work in this country. At the first (dance it might be supposed that the electric smelting ot steel.

This lower alloy has aaotkee impeKaa advantage, inasmuch as its melting point is rnneh tower than that ot material with a hh ULi.iisAigl of tungsten. The result is that, while the higher grade material requires the steel bath to be at acofi prooerly. the lower irrade may ewrn be added the ladle without fear of caorina hard snots in the steel. It the alloy not thorooghlr dissolved in the steel sequent also its ores, have high commercial the losses in the ordinary coal fired revcrberatory mace are considerable, and this is the case to an ren greater extent in the shaft or blast furnace metimes used in other countries. In a treatise a German authority, Dr.

Menkke, it is stated that io losses of metal in the slags and by volatization spite of this losses amounting to 7 per dust is albo complicated and costly, and stant source of trouble to the tin smelter. Another drawback to the use ot the revcrberatory furnace, which is the one generally adopted the necessity for intermittent operation loss tVCtASCOW lesigned electric fui methods. The dealing with the final purification of the was three phase current, produced mining purposes, and although furnace was designed for about 200 or about b.p.. but only 90 to 110 kw. were available, the daily output would hare been considerably fly steady, fo that electric light could be operated on the same line without showing any flickerine.

ibustion takes place in the eleetiie fnmace. only the theoretical amount of coal necessary for the be added, or about 14 per cent. instead of the 22 or 2fi per cent, (with Bolivian ore reraired by the reverlieratory pro ess. tee being practically closed, losses from were practically eliminated. In fret, i over a week with a temporarily arranged tube proved that less than 1 per cent, this way.

contained in the slags could be made to I in Romo ces slags from the first melt need, conta'ning only 025 per cent, of n. But it was found that the output of the furnace was somewhat reduced when such slags were produced. It appeared better to work two enes, the first or primary furnace being could be lowered into Heir retting, without up to 15 or 18 per cent, of tin, which was subsequently structural alterations and renewals each time, trratpd whcn gtil, hot aKoaA taTDACr, would stem to be a step the rurht direction. i advantage that any scale This prorcdure aLso the vauLc not con.C Contact With the lho M(J nmount comparatively inHroikl" no lon 'r diriinJ''! rwxld made 9 retort, which itself would be 1 tt TtVorcT'l with it cm run several hundreds of iiiiles cnn iai nim uuy a(, nrr or rrria furnace for the production I it.s high cost experiments have been made, it nt 2001 irt.hr;pkj rvtract practi aU the tin present. As fumes are nnr Vtrr rk cvrr rr success, by some railway companies to contaminted with oxide of iron and hIr? from PRtMIER AIR GAS SYSTEM xfcxfc'S 'of Zrrz (IMPROVED WBIOMT DRIVEN) tx vouldncrtatir: bgasWed in'a producer 1 Iriaffnrn MLWMtm ADY OR DAY r.awav'svstemV.

1 A he cost omanu'faenrrinu ZSSjSSSj1 foTomV'Td I the triaL ft" nnLgday IZ i oil could be reduced, and means discovered even hcatine would be realised. The" fires Is raaBHU shew for increasing it safety in the event of a collision. of a bank of retorts at present rurtri hg ian arvtt. I jt probable that many companies would retain exhaust mtn a common flue, and as the I sVnB UCHTIMC EMCIMEERIIIC CO, LTP, DrKerPncc to mcanB of lichtinc Ces leave the retorts at least at a temperature Altogether about 20 tons of met 1 be a of a purity 17. Sicilian Ateane, Loodon, WA LulJ ot LOOOdeg.

a heat saving appliance is of 99 5 p. cnt. (hec even purer than ordinary II BePent lnn'es ha 6hown that ce almost a neceasitv. There is a waste of much tin on the market) were prodnced duruux the trial. oil gas is being made at various railway gas moro than sufficient heat to raise the The oTtTnrmMrTrunt wJtfd? Sh I works than ras the case a year ago.

and on the steam required for compressing opera 08 ioo'kw0 hours "per t. TCWgef pwt, jttTiooT mmmm Fmmmmmm Ivbole the doubts which exist in the railway tions, the cost of which would be considerably running rnrularly a wnrkinp concern, the power WjMSIEEBlNo" 5 HOPS. world as to its retention seem to be more con nd th" advantages accruing to kTxTi gf4: med with cost than with questions of public Zl 'tem Sl swripusa rSys. JZ aaty. wolld be nnd much cheaper where only I TVndt alnrn.ee turnup on? ftonof tiS METHODS OF PRODCCTTOV.

wr. Ht of fllo llsM (in prodllcers) iostead of XL if suitable apphneelfor handlinlr ore ZSX tZI The successful utilization of oil ga.s depends jMirnte lots for retort and boilers, stoking and the metal arc provided. Thia, of course, refers Htfl. llotbofB. Wt burnt r.

U'sc comrnan imvi. i wen rokp flrp fop fy one Knllon vftrr considerably aceordinK to the sise ot ssssiBsBssBsssssBni busssssss opcti to porfectnn. nd with the ni( or OOW thfln two tonB per ton oi oil gasified, the plant, location. Ac. but the figures given above introduction of the inverted burner and small Compared with the coke consumption in a uggcst SStS i incandescent mantle there seems little room for nodern gas fired coal gas retort, which is 30th 3 awSreAMeS I 1 1 further improvement in tint direction.

No to 40th of the coal carbonised, the whole that the prc fesa is absolutely continuous day UL VJH1I ndic imorovements have been made I operation being conducted at a substantially i nijrht for montfc, whereas the ordinary fnrnaee however. in the inamrfaetttre of the gas, and the jjg JJJ in the aro quite dls. and eventual repairs. procc remama BUb tantiaJly the same as that propoTtiontc, although the two operations are The Prodcctio.v or Fkmo allots. Introduced by Julius Pknteeh about 1880.

The sUmly comparahr hr(Mlph elecirlc whieh reason is not far to seek. The process has hecTintroduced into this coiintrTby the Electric jWair Plants producta JJKiJtwJan P3" which thc of aPP RPfct the Rasihcation of the oil and I Works of the Brush (Limited). The generated by itenHine nearly consumed in the heat zone of an iron cylinder lined with ordinary refractory materia), and it is interesting to note that, no repairs hare yet been necessary. Attached to this body is the removable hearth composed of ordinary fire brick and refractory lining it can be run on a track and without heat, loss or skulling, and by 4 By slightly I the I ntiauous operation. The furnace itaelf.

ered is cases to suit individual needs. adaptable quiring l.OOOkw. hours i a reward current of ore the per diem caparit edaflTiea'rl eeessible. and the WTtoupe2ibWto' prod nee the ferro tungsten I ssscnnm yTV IwssT tsMrn with a power consumption of kw. hours per ton Aw Ay Jl Jj the power is supplied from the Corporation Power I yqaw wTa Station at 500 volts d.c and is converted jnto I jst' I motor generator set.

provided whh suitable regu I I lating vices. Three Urge furnaces are operated Jy If ft ri tmfti 1 lR alternately, thus utilising the foil power of the I lP eh of shout three time the eapacitvof thejwsejt the reduriag ac nt and flux in th required propor 1 tions. and fed into the furnace. After the smelting 01 m2U ssMs ftewt. to are bfted out bv means of a crane and broken into larger lumps, which are subsequently cleaned, broken up into walnut sire, and sorted ready for the market.

Trials are ateo being made with tant. LOCOMOTIVES Treatment op Coxrurr Oke. Vv For some three roars past a Ruth nburg electric OP EVERY rurnaee for the treatment of complex ores and the A refining of steel has bees runniaga: the fjougbborongh nPCrDIDTinN sh Electrical Engineering Company I StT I in number, are protected from hec.rrosive action i BRISTOL I of the hot gases by water jacketa, which are lined k. themselvea can be raised or lowered at will by the i gSF ackeu extending neariy to the surface. XaJJOV ManPUWUfi Ji5 BRISTOL, Farnley Iron (Best Yerttshire) Meat t.

Wi mm? The Farnley Iron Ltt, lpaeity. AH parts At Lnugh borough, where the furnace fitted with a pipeleading into an impro been tried in the treatment of complex the rroeess seems to lend itself to the il complex ore the sine, lead, and sulphur with a small percejEtage of sQver, wen i. leaving copper, iron, silica, gold, and ml silver in the hearth as a matte. TV materials were caught in insoluble, wi in the acid 1 clpitafed in suitable tac was afterwards sweated iilphur inside precipitated. The zinc but the piutcss lends it who witnessed the rver leadpfeeipitnte i the elertro met.alrargieal I YARROWS GLASGOW.

Fcrnwfr of POPLAR. LONDON. Shallow Draft Steamers PROPELLED BY STERN WHEELS. OR SCREWS WORKING IN TUN NELS FITTED WITH YARROWS PATENT HINGED FLAP. OXYGEN THE BRITISH OXYGEN COMPANY, Ltd.

The Oldest and most Extensive Oxygen Producing and Distributing Business in in all important Engineering quipped exclusively wi i producing oxygen s. Manufuo YVelding and Appliances and Specialists ictal Cutting Ao ElvertM St, Wcstaiitter, Uidaa, S.V. lanufaeturing the rcdv available at the present time is based reeocnitien of the fact that oil 1 and I alloys. The msnutiwxure of such alloys, notably of England, and will no doubt be of even various purposes is steadily in cress BLASTING Dynamite, Gelignite, Blasting Powder EJJf and afl accessories EXPLOSIVES. CURTIS 4 HARVEY, LTD, 3.

Gracechurch Street, London, EC Hounslow, Qiffe, Faversham, greater importi Th material used for thc manufacture is an not pasifiable, instead of reverting to tar, hitherto ssoat oi tins yahaWs oil known as gas oil, a distillate of natural can be recovered as a distillate, from which J. fi petroleum intermediate between burning and motor spirit and naphtha for air gas machines th( metnods which bare been worked out lubricating oils. This material is the cheapest can be obtained, the recovered value reducing wlch ore as wolfram can be economically smelted nd the best suited for the purpose and in mat extent uw cunt uwuiu.m. wiring wt Dy eieoiriossy wawi, "llc SSr SffwfcS treat oil for the production ofl JJJ lower in the future. It poasessea a heatmg gas and oi liquioa conuunug inrge proportions numbrr years.

The process is said to produce ably with the foreign prou act. of tlie falling off coal gas companies its pri ilue of about 20.000 B.Th quantity yields about 9 cu. ft. of gas of a heating value of about 000 B.Th.U. per cu.

ft. That i a 60 perci of the gas oil may be converted KING'S COLLEGE. FACULTY OF ENGINEERING. SPECIAL ADVANCED I KCTTEE3 AND COURSES. COIOlEyCK lltn JAXCAKY.

CIVIL AXD MTCHAN1CAL SSOnSUKUQ. "hS" KMyrte rai I eras, the balance containing 40 per cent. of light oils such as the above. For the pur poses oi a railway coimwmv wjuju jwo duct can be sold to refiners, as is often the ease now with the small proportion of "hydrocarbon" produced by the Pintach process. The latter Liquid is sold for about 3d.

a gallon, certain quantities of it being employed for enriching coal gas, and in addition it is to some extent treated by Hull oil refiners. The profitable sale of all the liquid products of the later processes, if used for the manufacture of oil gas, would materially reduce the cost, and with the adoption of vertical retorts, gas firing. modern requirements. Oil gas would thus be better able to maintain its position against the projected use coal gas. with 1 ner hir though such a tew percentage is to be looked eeptiaaUy k.odaddoar.

is taken inn to the parity of the raw materials. The alloy, are smelted from their ores, in the nSton7Ssn BuUt fa sometimes teandUa? atowr production eurgT quantities i onWesWawaw ttoan a mat aria I of ahea St being icon. n'surtstas'tor fills steel iO per cent. pig iron. The iron proient in the alloy nut, of coarse, toeaaslansetksii aiisia iUsTT erf purity at Ltw raw material employed for the maiaatrU tan are the only manufacturers who guarantee all their oxygen to be 990 pure.

COKE AS A DOMESTfC FUEL. STEEL ROLLING DOORS SHUTTERS the kitchen. The cooks mvariabr will not produce a fire for consequently bailed with satsfaetio and Dock: Sheds, Garages, etc. occorr to usudl aria om anrtianrfrtbIjnctonCoanty Council and Insurance Offices for FIRE ICSflTfIG PORMSES. EiTrtiLT wmauta IR IICLAll itie use.

and mo. at the London Works of I have failed a the statements richer quality, special! adapted for house Ores, or the ordinary gas coke, is that it appears to be neeesssry employ a mixture of coal and cote, and tbid seems be an almost fatal objection. The drawbacks MILNERS SAFE CO LTD proved an obstacle ant more difficult to light iployed. but this objection 1 ixture be made of about tw I understand that in the pre par at i of gas coke, le fire, if coke ts) with one part of coke. ttraminaung gas.

vmcn is is readily taken by the gas 1 the sulphur and th MANNESMANN JTUBES. Loose Flanged Tunas, Epicot and Faucet Pipe. Oas Cylinders, xiraeted. I may mention that which is conducted retorts contains the whole of the fixed original coal contains 50 per cent, of this 1 nay resulting coke will have 75 per eenU and I 11 testify that this tarieas coke burns freely and yields a hot fire. Moreover, these is I GILBERT R.

BKDGBATX. CARNEGIE RESEARCH SCHOLARSHIPS. The Csanel el da ban et Stett Isstause iWW praeted to Slaulsriksfl before Fehrrarr 2k est enedal ierss la be efataed Uovd. Sorrettfy. Iron tad Send IasUtUr.

28. Vk Sweat. Laadta, S.W. it, when you can pomp it fox lew than lid. from am jfc ARTESIAN IBJsBS jMf Owi PWeifttt LET ME I SOW Tin AMOOMT OF WATER WMsHsrVKw TOO REOU1KS AMD nHK SHALL BE BE FtBASBO TOOOOTE.

Mm N. Thorn PATRICROFT. wBUBHb riuaene mZmmtZ?.