Page 19.
THE CHINA MAIL, THURSDAY, JULY 20, 1949.
NON-FERROUS METALS
K
COPPER TUBES FOR DOMESTIC SER-
VICE.
COPPER TUBES FOR
·FINERIES
SUGAR RE-
COPPER TURES, STRIP. SHEET & WIRE BRASS TUBES; STRIP, SHEET, BARS
_&_WIRE
ALUMINIUM & ALUMINIUM ALLOY
SHEET, PLAIN & CORRUGATED CONDENSER TUBES
NON-FERRÓUS EXTRUDED SECTIONS-
&
OTHER NON-FERROUS MILL PRODUCTS
Maunfurturers;
ICI
Imperial Chemical Industries Limited
Metals Division
Wilton
Agenta:
England
Imperial Chemical Industries (China) Ltd.
Paine's 13.
Chater Rond
Tel. 28658.
U.SPALINGER&CO.LTD.
WIRING DEPARTMENT.
ESTIMATES SUBMITTED FOR
DOMESTIC & INDUSTRIAL ELECTRICAL INSTALLATIONS.
Supplies:
STERLING CABLE CO., LTD., BERKSHIRE.
T. R. 5. V. I. R.. P. V. C. & Underground Cables.
BILL SWITCHGEAR LTD., "BIRMINGHAM, Switch & Distribution Gear,
SEAL CONDUIT CO., LTD., LONDON, Electric Conduits. -
TELSEN ELECTRIC CO., LTD.
CONTACTUM LTD.
Accessories.
POPE, VENLO, HOLLAND.
Bulbs & Fluorescent Tubes.
NICO LIGHT ENGINEERING CO., LTD., LONDON.
WADES METAL SPINNERS LTD. Domestic, Marine & Industrial Fittings.
Phone: 32785,
JAEGER
BA, Wyndham. Street.
ENGINEERING PAGE
Lights For Instrument Landing
The instrument landing run-
at
way
London Airport. Heathrow, has been equippe With an approachway of GEC
England low intensity ap ach lights.
XI
FOW
There #ghts, which are arrang- im pole top mounting, hav in 11: distribution heir light
fou furry
beam uf regrets above the horizontal an howtart through 300 degrees 1 zkanth, Thus the approachwa visible to an aircraft upproach ng from any direct'm and to air raft on the circuit.
The GEC has also supplied th Intensity runway light:
| Nigh
hich have been specially deve Tuped as part of a high intensit Heusi, lunding scheme that w ventusily keep the airport pera'm even I visibility drops o 200 yards by day of 100 yards at night.
The Hights are recessed into the unway. Having a projection of only two inches above groumi eyel and a smooth contour, the the 9ttings present no obstacle to aircraft, while the design is such
on the twined Hnt stresses
iron top due to aircraft runnin
transmitted over them are not dough the glass ring through which the beams are omitted.
Produces Boom
A special arrangement af_3+} optical system and reflectors pro- in each direction duces a beam along the runway with a maxi- num intensity at intre than 5,000 Candlepower,
The distribution of intensity is such that the max- atm assistance is given to tw pilot, while the light emitted in directions
away from the ap- ponching aircraft is limited, in anter to avoid halo effects foggy weather.
Threshold lights, at one end of the runway, are special versions of the runway light with the ad dition of colour screens.
The GEC has also supplied the taxiway lights for the numerou
follow from ruutes that aircraft
the apron to the runways ani ispersal aves. These light
Inve
Producing Artificial Board
For many yeres artificial board' ("man-made Jumber") a waste material ruch as sawdust bonded with resin, has been used all over the world Increasingly in vast quantities for all One of the severe sorts of bullding and industrial purposAS, handicaps in production has been the expense of heavy prosses and the fact that it could only be pressed out within certain Alzen. Photo shows the apparatus at the plant at the Research Centre of the British Artificial Resin Co. for producing the radio high frequency waves, used in the process of convert. ing the sawdust and resin into a-hard-board, which....is.muštamo able for many purposes.
New Technique For
Precision
Casting
By the introduction of a new technique the Birm- ingham Small Arms Company, Birmingham, in the English Midlands, have succeded in mak- ing precision casting a commercial competitor to older methods of the production of engineer- ing components in low-priced constructional stools.
their distribution concentrat Even small mechanical parts can be turned out at
ነገር
ed into a narrow beam a few de- arees above the horizontal, and their visibility in azimuth can limited through ony number of degrees to suit their particular tocation.
Colour Alters can be fitted in- side the gtts, and thuse at Lon- don Airport are equipped with blue Alters.
NEW STAN DARD
"air plus" compressors
AVAILABLE EX STOCK:
ONE 250 CFM PORTABLE COMPRESSOR,
ONE 50 Ctra.
DRIVEN BY INTERNATIONAL HARVESTER UD-14 DIESEL ENGINE, MOUNTED ON Four Pneumatic TYRED WHEELS.
AND A LARGE RANGE OF
a cost lower than by normal methods, and it is known that many types of surgical instru.. ments can be made at a surprisingly low price. Many other things have also been made by precision casting from nutcrackers to small tools and golf club-heads.
New Paint
•
Precision casting is an expensive Job and in Britain it has been chiefly applied to austenitic steele and other alloys in respect of gras engines, a military neces-
Will Savety which took little account of
Australian Veneer Machines
By CHARLES LYNCH
Increasing demands by the home-building and furniture trades in Austraila for plywood have created serious problems in plant extension for local sawmillers.
Vencer machines which per form the work of cutting the plywood strip from the moun- tain trees have in the past been Imported into Australia, usual- ly from the United States of America and from Germany.
The currency position has re- cently presented difficulties to mill owners, apart from the time fretor involved, with
Increasing necessity for the speedy Installa- tion of new machinery.
tho
The Arst Australian vencor machines have now been maile at Richmond, Victoria, by J. A. Castres, engineer of "Burnley Street, Richmond, and have res ponded to tests. They are ragarded as being generally capablo of meeting the requirements of Ams; tralian sawmills.
Many of the mills cut ping wood for the special purpose of the irade. The sturdy Australian mountain ash is another speelan whose plywood la considered commercial possibility.
Own Design
Before being cut by the machine the logs are heated, and the wood
la peeled off in a continuon strip.
Mr.
Castree built his machines to his own design, and casts were made from his own patterns, and general construction principles were based upon the a sturdy, serviceable design vl
ype of unit which could accom modate the various types of logs,
A machine recently compleled for the Elarish Mills near Tully, In the State of Queensland, is typical of the designs produced. cach Its two gear wheels are hree feet in diameter, and contalo 104 leeth in each.
The machine con, cut to quarter of an inch and also to 1/20, 1/16 and one-eighth of an inch, and can take logs up to three feet in diameter, and with lengths up to three foot.
The factory workshop is also engaged on large unit for a Queensland mill. and it seems likely that now, that an Abs- trallan factory can turn out these inachines, local mills will find it heuper and quicker to place their orders
locally.
Australia's general imparts of motive-powered machinery ware valued at 2A10,140,000 for the year 1944-1015,
That the plywood industry itself will expand seems most likely, as
upon The chief problem, solved by important research
the
Ship's Steel the Birmingham firm, has been suitability of types of local timbers
to make precision casting cheap for the wood have been carried Special treatment with anti-enough to give promise that it out by the Forest Products Divi- corrosive paints, evolved by the can replace existing processes, alon of the Australian Council for Scientifle and Industrial Research, British Iron and Steel Research such as machining.
Melbourne, Victoria. The Division Association, is expected to re-i By the designing of special dies asen a veneer lathe of American sult in a saving of steel and will and strict control of all processos, manufacture. obviate the present need for 70 per cent of machining has
In the State of South Australia almost continuous painting of already been eliminated. The aim ships, bridges and other steel luas been to replace complicated excellent ply has been produced machining processes by precision from the pinus radiata in recent structures.
casting while leaving the simpler years.
.
A paint, known as "No. 173" and cheaper ones, such as boring has been successfully applied to holes and grinding flat surfaces the under-water parts of ships. to the machinist. Results so for obtained show
Other local timbers investigated
PHILIPS
PHILIPS TL LAMPS
Sale Agents: MANNERS ENGINEERING LIMITED. Mercantile Bank Bldg.
Tel. 34174.
ALL AROUND THE WORLD
you'll find
SLOAN FLUSH VALVES
THERE ARE MORE SLOAN FLUSH VALVES SOLD THAN ALL OTHER MAKES COMBINED.
Agents
ANDERSEN, MEYER & COMPANY, LTD.
David House
Tel:*28091
PRESSURE GAUGE
British & U.Ş.A.
STEAM PRESSURE GAUGE.
Dial. 3", 4",
Steam 30, 50, 75, 100,
120, 150, 200, 250, 300, 400, 500, 600
Pounds.
VACUUM GAUGE COMPOUND GAUGE Air Gauge
Acetylme Gauge - Oxygin Gauge.
Stocks carried by
MING & CO., LTD.
and in use are mainly hoop pins, 105, Des Voeux Rd., C. and the special purpose”, thrbord,
The dios. used for the now the Queensland maple and walnut,, (Opp. Central · Market) promise of prolunging the life of casting process, made of rubber, used mainly for furniture. ships, a saving in the amount of plastic, or low-melting point alloy, steel used in ship construction and but generally of stoel, cost up to
a reduction in fuel consumption. £1,400 for some parts. Now,
machines, specially designed for
Another important development
the now process, inject the wax In the prevention of metal corro-int sion was reported recently by the into the dies in the molten stato Chemical Research Laboratory, of applying a double pressure system Britain's Department of Scientific which can rise up to more than
1,000 pounds a square inch. and
Industrial Research, The dip ping of metal articles simply into A mixture containing rubber L and sodium benzoate at ordinary room temperatures, produces protective coating which has good, mechanical proporties combined" with that of corrosion provention. Large articles can be sprayed with equally good results.
Latex
This force is necessary to en sure that the wax fills the mould completely and reduces subsequent sirinkage to a minimum. When the moulds have been formed they are dried at a temperature high enough
to molt the wax by which it is reclaimed. The moulds process it are then strengthened by baking them for four hours in a gaL- Another application of recent red tunnel oven in which the scientific research comes in the temperature ranges from 200-1,000 form of "Avigel" plastic pealegrees Centigrado.. Introduced by Clear Glass Pro
bunda/
PNEUMATIC TOOLS
YU TUNG TAI LTD. Engineering Deps
BK BUILDJINGI.
ducts, Lady' 10-18, Malvern Road, Southampton, Hampshire, Eng- used by dipping without any
special equipment, a
H-forms a tough resilient cont This material is intended for log which can easily be stripped exporters or such items as motor off and leaves a slight film of vil
transparent. car tram pačia auricultural, air-con la metal. chinary, Locis, 'angines› ITUÏVITAE * to be seen. Once,
pord under tropic
Can You Do This?
Bostik
"There's
CANI
Bostik
26147
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Teler
司公限有
23818