1931-11-21 — Page 2

Page

Use Green Island Cement

for

Constructural Work of

Every Description.

HOW GREEN ISLAND CEMENT IS MADE

Green Island Cement is manufactured from hard limestone and clay. It is necessary that these materials should be finely ground in ordër that they may come into intimate contact with one another in the burning process."

The finely pulverised materials are mixed in a certain definite proportion, roughly one part of clay to three of limestone, and are fed to the Rotary Kilns."

In these kilns they meet the hot gases and " flames generated by pulverised coal blown in at the other end of the kilns, and after various chemical actions have taken place, they combine to form Portland Cement Clinker.

The Clinker is ground down with a small percentage of gypsum to regulate the setting time, and Green Island Portland Cement is thus produced.

Although sounding so simple, in reality the process is an intricate combination of mechanical, physical and chemical operations, needing great skill and care. Nothing but constant and accurate supervision will yield the results 90 well-known with Green Island Cement, namely, strength, uniformity and reliability.

USE GREEN ISLAND CEMENT

Issued by the

HONG KONG DAILY PRESS, SATURDAY, NOVEM BER 21, 1931.

ENGINEERING AND BUILDING

WAY EXHIBITION,

The Propelling Machinery of ENGINEERING AND RAIL-

the "Empress of Britain."

CANADIAN PACIFIC LINER SETS WORLD'S

FUEL CONSUMPTION RECORD.

and

ILLUMINATION OF LARGE-POWERED

· LONDON,

SUCCESSFUL FLOOD- LIGHTING EXPÉRIMENT.

One hundred years after Michael Under the auspices of the Ministry Farnday made his successful ex-

LAMPS.

50,000-WATT UNITS.

ני

For a number of years there has been a steady increase in the capa city of lamps designed for special typos of illumination. For the

of the Railways of the Nankingperiment in the production of eler-lighting of streets and open spaces, Government, an International. En-

In special circumstances, Buch, as

aerodromes, lampa of 10,000 and the lighting of landing-places at

over 20,000 watts have been devolop ed. Generally the higher concen- tration of those powerful units leads efficiency, and it is claimed that a to a marked increase in illuminative

3,000 watt lamp gives eo per cent. greater efficiency than one of 60. watts..

gineering and Railway Exhibition | tricity from magnetism, London was for flood-lighting, and in the film is to bo hell by Chiao-tung Univer illuminated by flood lighting in industry, lamps of 2,000, 3,000, and sity on the grounds of the Univer- honour of the International possible, but very useful."

5,000 watts have proved not only sity at Ziccawei, December 12 to 27.mination Congress held there in the The announged purposes of the ex-first week in September. Those re- The advent of the "Empress of of power to be obtained, while athibition is to bring before the Chi-sponsible for this novel experiment Britain," which completed her the same time maintaining as high nese public, and particularly before in lighting could hardly have reali 2845-mile maidon voyage from a pressure as possible in the control those engaged in engineering need what the effect would be. They Southampton to Québec on Juns 1Ị chest for quick operatión.

tivities and education, the intest in five days, five hours and 12 The intermediate-pressure minutes is arousing greater, interest low-pressure ahead turbines are of than the entry into service of nay, the reaction type throughout with other British-built Atlantic vessel end-tightened hinder of phosphor since 1914. Not the least inducement. bronze, to embark on the investment of The high-pressure astern turbines many millions of pounds in the cach consist of a three-row impulse Thuilding of the Empresa of wheel, while the low-pressure astern Britain," was provided by the turbines each have two impulse material economies in thin cost of wheels with two rows ench, in which propulsion and operation which Mr. the blades are of stainless stee). John Johnson, the company's chief superintendent engineer, has effect- ed through his new conceptions of high-pressure steam practice. It

To Eliminate Vibration,

To eliminate vibration, all the rotory have *been dynamically

dividunt buildings, but everyone was effect of the flood lighting upon in-

surprised and delighted with the panorama of London's many great edifices illuminated on a mild sum mer's evening.

developments in engineering, indus- no dent. able to judge the trial and scientiae products, in rail- way appliances and equipment and in methods of administration.

Space for exhibits."which is being provided without charge, is being Fullötted" and in connection with these exhibits it it announced that gas, electricity and water will be supplied on the University account, A committee of the Faculty of the University is caring for exhibits of manufacturers and industries not represented in Shanghai. General

Fine Spectacles,

D

It is now stated that lamps of the order of 50,000 watts have been de- veloped. There are obvious prob- It was a fine spectacle and it gave lems attaching to these large de delight to

immense arowde of signs, as with a 50 kilowatt lap at

· spectators. " Bridges and parks were

220 volts the necessary 230 amperes- present some difficulty in the lendi thranked, and on the high vantageing-in wires, the metal parts becom- apota of Hampstead Heath there ing very hot. The tungston Bla was a great congestion of people.ment is of wire 2.5mm. thick, weigh- ing 010 grams, and wounded as a nder the direction of Mr. Sheng. London, since the tiny on which the quantity of tungsten wound suffice Z. Wang, who is Chairman of the Armistice was signed after the for many thousands of lamps of the Executive Committen of the UniverGreat War. Under melear sky and

130 watt typo... sity.

in the moderate "darkarss buildings stood out clearly in their bath of

may be reenlled that the "Duchess" balanced. The low-pressure ahen arrangements or the exhibits are No such crowds have been seen in apirt! 10.8mm. in diameter: Thin.

turbines are of the double-Dow

passenger steamships of the Calip dian Pacific Line attained a fuel alanced type, and each of the other economy of 82% 16. of oil per sh.p. (turbines in Atted with a dummy to per hour for all purposes, and gill, reduce the and thrust due to the

difference in more recently the same OWDEIS'

כן

steam

pressure.

Gargoyle-lubricated Empress of Michail thrust bearings of the spher Japan set a "world's record, ofis-seated type are fitted to each rotor to take up any remaining .003 lb. for all purposes. And now, in her trials the new Empress of axial thrust. Britain," also Gargoyle-lubricateil,.. has shattered that record with a fuel consumption of 37 b. at the same time bettering her contract speed by 1.5% knots, →

The hull of the Empress of Britain was built by Jolin Brown & Co., Ltd., of Clydebank. This company also built and installed the main engines, gears, boilers. etc.. under Mr. Johnson's super- vision.

The vessel is propelled by four screws, each driven by, an indepen- dent set of single-reduction geared turbines of the Parsons type. The

GREEN ISLAND CEMENT CO., LTD.gines driving the two inboard

2ND FLOOR,

EXCHANGE BUILDING,

ΤΗΣ ΥΟΚΟΗΑΜΑ SPECIE BANK BUILDING, SHANGHAI,

Architecton

Palmer & Turner

Steel Framework 1,893 Tona

Supplied by

DORMAN LONG

STEEL

The Strongest, Bafest and Lightest Framing Material

With steel less volume and weight of material is used; less tonnage trasported, handled and erected, The building weighs less, and lighter, less expensive foundations are needed.

DORMAN, LONG & CO., LTD.

#1

STEELMAKERS, CONSTRUCTIONAL ENGINEERS AND

BRIDGE BUILDERS.

MIDDLESBROUGH AND LONDON.

screws are designed to develop two. thirds of the total power, while the engines driving the two out- board screws develop the remaining one-thirti In other words, the power of the mutboard engines is only one-half of the inboard en- gines.

A Normal 67,000 S.H.P.

The machinery has been designed

Owing to the high steam tempera- ture employed, the turbine casinga

of cust steel, with the exception of the low-pressure casings, which

are of cast iron.

The first liners'

en the Pacific and

Atlandic-he Em

presses of "Japan

and Britain both

ruly a

D.T.E. Oils

to develop normally a total output. To facilitate the lifting of the

of 60,000 a.h.p. in order to maintain upper portions of the surbine

In each set the high-pressure turbine i fitted with an Aspinall

surface of 2,000 sq. ft. with 2 in. tubes 11 ft. 6 in. long. The tubes for all the condensers are made of cupro nickel.

The Boilers.

strong electric light. The magní ficent tower of the Houses of Par

liament could be seen in minute detail against the background-of- night. Westminster Abbey was mir- rounded by à noit padiance which The thrust of the propellers is impressively showed its fine lines. transmitted to the pessel through and sombre dignity. Buckingham Michell thrust bearings of the Palace was one of the most beauti- single-collar type, fitted to theful sights of all. The experiment main lines of shafting immediately showed that London contained in- Inft of the gearing: and the tape numerable surprise and delights, Hafting is supported by bearings even for its own inhabitants, of

of the Micg pivoted-pad journalbom, hundreds of thousands. stood type.

for hours contemplating what was

The propellers, which are of solid perhaps the most remarkable dis bronze, have diameters of 19 ft. play of illumination ever staged.

in, and 14 ft. 6 in. for the inver and outer shifts respectively. When developing the formal service power »|of 60,000 sh.p., the speeds of the propellers are 150 and 200 p.m.

and the corresponding speeds of the turbines are 1,305 and 1,795 r.p.m. for the inner and outer shafts, ro- spectively. The reduction ratio, therefort, is about to 1.

The Propellers.

The huiler installation consists of eight oil-fired water-tube boilers of the Yarrow type and one oil fired water-tube boiler of the Johnson type. C

The Yarrow boilers are "of the ddyble-flow, aide-fired type, having one strani drum, three water drams, and ons super-beater drum

The sides of the boiler, after which it flow of the gases is through both

passes through a large tubular air heater and thence to the funnel.

The boiler and superbeater drums are hollow rolled forgings with ends formed integrally, and repre- sent the latest practice for high- pressure boiler work,

The Johnson boiler consists of two- tienlly one above the other and rou large-diameter drunk, placed vers nested to each other by curved tabes which are arranged dongitudinally and across the ends in such a ma ner that the combustion space is almost entirely enclosed by water tubes. In addition, there is a wall of water tubes along the centre of the bailer, which divides the com- bustion spres into two separate compartmente.. This arrangement

a speed of 24 knots. Ff an increase casings, the receiver pipes have been uf.sperd is necessary, an overland | dinriectel to the lower halves of the power of 64,000 s.h.p. can be main tubines in every cass. Emergency tained for long periods.

connections have been fitted, so that The main turbine sets each cor-any of the turbines can be put out prise one high-pressure, one inter- if this should be, found pecesBRYY muliate-pressure and 01 low at any time. pressure turbine, working in series; and each turbine drives a separate pinion, which engages with the tonih gearwhrel For astern run- patent governor combined, with a wing, a high-pressure unit is incor-for-d-aft indicator and control, porated in the same casing with while the intermediate-pressure and each of the two intermediate ahead low-pressure turbines are fitted with fore-and-aft indicators and controls turbines and a low-pressure unit in the exhaust end of each of the twonly. With this arrangement, the steem would be shut off in the event low-pressure ahead turbines of the

of the turbine speed excccding a of tubes provides for a considerably inner-shaft machinery only. The

larger mount of tuba surface ex- certain limit. The fore-and-aft inposed to radiant heat than in other aster turbines are capable of

dientors show any axial movement types of marine water tube boilers. developing 60 per cent of the

of the turbine rutors; and should

A series of very complete trials aggregate 'abend service power."

showed that the boiler is espable of the wear in the thrust pads make generating double the amount of this movement excessive, the con- steam" per square foot of heating The high-pressure turbines are all trol would then operate and abut surface, while registering the same efficiency no other standard types of contructed to withstand a maxi-off the steam lines to the turbines...

boilers worked at ordinary mer- mum working pressure of 425 lbs. Steam would also be shut off inenalile rating. per square inch and an initial steam the event of the oil pressure in the

Supremo Vortex and Tangential stunm dryers have been fitted to the temperature of 725 F., but they lubricating system dropping an

boilers. Each main boiler is fitted bave, been designed to develop the duly.

with two automatié fred regulators. service, and overload powers when

one of the Weir and the other of employing atenm between the limits The rain condensers, which are spot-blowers are also provided. In- the Mumford type, while Pay (of 375 His per square inch (gauge) of the Weir two-dower regenerative order to give the alarm when the 4

and b. per square inch type, with a large reservoir at the water in the boilers falls below a (absolute), with an initial steam bottom for storing the water requir-water alarm gear has been installed. pre-determined, level, Mumford low.

temperature of 700 F..

ed for the successful operation of 'In the forward boiler room there the return-tubo typu for domestic are also two cylindrical boilers of

170

Staum ProLTES,

The Condensers,

These boilers are arranged to burn pil fuel with the lowdes system of forced draft, and are designed for a working pressure of 200 lbs. per square inch.

The high-pressure ahend turbines the closed-feed system, are alung

of the impulse-reaction type, underneath the low-pressure tur- And other auxiliary purposes. comprising 11 two-row velocitybines. Each inboard condenser has wheel with blades of stainless a cabling, surface of 20,700 en it., steel, and a renction portion fitted the tubes, being in, in diameter with end-tightened blades of Monel and 34 ft. 0 in. long; while each metal. Nozzle control valves are outboard condenser has a cooling itted to enable à gradual increase i (Continued on nezi Uolumn.)

installation is of the Wallsend- The oil-fuel pumpmg and heating Howden typo.

»

"People Who Matter”

PEOPLE WHO

MATTER to the advertiser are the people who can afford to buy his guorta. Most of

these people hay and read the

Hong Kong Daily Press.

THE EXPRESS LIFT CO., LTD.

WITH WHICH 12 INCORPORATED THE BUSINESS OF

SMITH, MAJOR & STEVENS, LTD./

EXPRESS SMS

LIFTS

MODERN

LIFTS FOR MODERN BUILDINGS

SPEEDY RELIABLE SERVICE

FOR DETAILS APPLY TO

THE G.E.C., QUEEN'S Building, Chater ROAD.

EVERYTHING SE.C. ELECTRICAL

you guarantee