Pize: 6.7
THE CHINA MAIL, THURSDAY, SEPTEMBER 28, 1950,
WORTHINGTON
"PUMP HEADQUARTERS"
CENTRIFUGAL
ENGINEERING PAGE
POWER
Boat Diesel
Diesel engines
STEAM ROTARY
MARINE
PUMPB-COMPRESBORO--DIESEL ENGINES
BTEAM POWER EQUIPMENT-CONSTRUCTION EQUIPMENT.
Agents
ANDERSEN, MEYER & COMPANY, LTD.
DAVID HOUSE
TEL: 28091.
ORANT
JW-D
CLAZING: COMPOUN
Bostik did it!
But that's not all, BOSTIK IS NOW USED IN HONG KONG FOR HUNDREDS OF PURPOSE
Amongst Them are:- STICKING DOWN.RUBBER
FLOORS
STICKING DOWN
LINONEUM
JOINING PLASTIC
PRODUCTS
SEALING
WINDOW
FRAMES
SEALING REDIFFUSION
CABLES
FURNITURE MANU.
FACTURE
BOOK @INDING
WATERPROOF JOINTS IN
SHIPS
MOTOR CAR WATER. PROOFING
WILLIAM JACKS & COMPANY LIMITED
HEAD OFFICE, PATI JHBON
302 PRINCES BUILDING.
Tel: 22392
BRANCHES INDIA, MALAYA,:
BURMA, BORNEO,
BYRON-JACKSON PUMPS
- LOS-ANGELES - 54,-CAL
PUMPS FOR ANY PURPOSE AND
OF ANY SIZE':
Heads up to 7000 ft.
Deliveries up to 90,000 gallons per minuto
Doep Well TURBINE PUMP Driven by a Hollow Shaft
U.S. Electrical Motor.
engines Aluminium alloy
'With the increased motori sntion DI shipping, expecially small commercial shipping, the question of the operating costs becomes more and more imperative. Inexpensive fuct con- sumption, simple servicing, small repair expenditures, little los of time with repairs are the essential features of economileul Operation. Mercedes-Benz, have developed the 2- and 4-cylinder Diesel engines, types BM 202 A and BM 204 A, which are un- equalled in the versatility of their use, their economy of opera- tion and their reliability. we to their compact construction, moderate weight and middle speed range, they are well-suited for all kinds of water craft, especially for passenger boats and harbour, launches, Inspection vessels, middle and larger decked motor yachts, life boats, tug boats and fishing vessels, as well ea for auxillary engines for willing yachts and small merchant ships. On reguest the engines are supplied with reversing gear of proved construction on a common frame:
Another large dollar
order for Marconi
A second largo dollar order for television equip. ment, placed by the Canadian Broadcasting Corporation with Marconi's Wireless Tele- graph Co. Ltd. means that Britain is to sup- ply the entire studio and outside broadcasting television
a Canadian equipment to start television service.
A few weeks ago an order to equip two studios in Toronto and two in Montreal was placed with the Marconi Company and that Company is now to supply, under the new contract, two specially designed television outside broad- casting vehicles.]
die-castings
The traditional commercial method of `making a casting is to pour molton metal into tho im- pression loft by a wooden or metal pattern in sand.
.....
Holes and entirely hollow parts con be cast if ap
propriately shaped cores, also fashioned of sand, are placed to prevent the molten metal- from occupying the whole of the impression. Die-casting la a well-estab- duction rate for anall compon lished but more recent method ents, and fine surface Anish. widely practised for nonferrous metal castings. The mould, known as the dic, is usually close-grained cast iron or steel, and the cores usually steel.
Iblerances again depend upon the size of the component, but a typleal figure for two holes, 34in. apart on o line Bedeg, to a parting line, would be plus or minus 0.004in., although the dimensiona of the holes themselves can usually be held to within plus or minus 0.0013in. for each inch or part of an inch.
Special advantages Closer accuracy, better, repro- duction, high mechanical strength, and a smoother surface finish are the special advantages of the
Cored holes should be given method; and whereas the sanda taper of 1-2 deg. Wall thick- mould is used only once, many resses down to 0.10Din. or even thousands of castings are taken less are possible.
from a single metal die.
Siza limitation.
The die must be so constructed that the cores can be withdrawn after the casting has been solidi- Size is the main limitation on fled, and so that the die can be the usefulness of the process. In opened and the costing lifted out, general iba maximum size is do- This affects the design of the fined either as one of 101b. in casting itself: cored holes, for weight, or as a projected area of Instance, should have a taper of 300 pq. in. of the dio Joint when abuut Ideg.
the depth is not more than 10 inches.
There are two variants of the! process in use in the production of aluminium alloy die-castings.
The dies, usually made of alloy steels, are rather costly to manu- facture ; a minimum quantity of The first, gravity die-casting- 10,000 Castings is usually required. KQ called because the notal The importance of collabora- flows into the die merely under tion between the customer and its own weight is suitable for the founder cannot be over- runs of 3,000 to 50,000, Within stressed, points out the Alu- this range the initial cost of the minium Development Association die usually can be justified.
.
in a review of the application of these two processes to aluminlun alloys, from which these “notes have been taken.
Design requirements
Fine tolerances Tolerances of plus or minus 0.002in. to plus or minus 0.005in. per inch, depending on the linear! dimensions and wall thicknesses, Undercuts should be avoided, are obtained; for
counselied, small it is
thera castings the lower tolerances are should be no sharp changes be- easily obtainable.
tween thick and thin sections In some cases slight changes n' design to assist the foundry can be extremely valuable.
most
The size of casting which can be produced by this process is difficult to deone since much de- pends also on shape. The most common range is Boz. to 5lb., but some heavier castings show appre- clable economics.
Gravity die-castings between
a few ounces and 50lb. are in
These vehicles will be complete cont cameras, power distribution everyday production, and have television stations on wheels and unit and ballery charger, been made in weights up to will cost over US$100,000, and power regulator unft. 1201b. Within the usual range.
The design of these
ano- On the left hand side will of weight the minimum practi- will constitute be a built-in ladder to the cal wall thickness is 34152, great advance in television out- roof (where
the radio link though it is sometimes possible side
broadcasting equipment. is erected), a workbench, a to go even_lower_than_this, They are to be streamlined and heater/cooler plant, pulse former fully insulated and will contain and
shaper unils, power
and
one
bile stations
all the television equipment which communication units.
Pressure die-casting
The
and
The choice of the most suitable
alloy depends on the strength.re- tions of service, and the nature of quired by the designer, the condi- the casting.
BOILER TUBING FOR SIAM
A contract for 147,000lt. of precision steel baller tubing for. the Siamese Navy is now being completed by Tubes, Ltd., Bir- mingham, and Howell and Co., Ltd., Sheffield, both companies Tube Investments.
Is usually found only in well- Beyond this portion, in the rear In
pressure die-casting, the subsidiaries of fitted studios.
half of the vehicles, there will metal is forced into a steel die Ltd. Each vehicle is to be a three- be four armchairs (facing back under
high pressure. eamern station using Marconi wards) in front of which will be advantages of the process are. Mark II cameras--and will be three camera control monitors, closer tolerances, a foster pro- fitted with full video, audio and audio and vision mixer control radio link
abies the restols en-units forming a complete control) and will be manufactured at the
19 send
console.
vehicle to a given spot and have Above this console will be a three cameras in action there, in link control unit, and a monitor a short time, sending pictures receiver. Below the console back to the main station through row of cable drums carrying all its own radio link transmitter. the cables needed for three Behind the driver's seat, on camera operation will be fitted. the right hand side, will be spe- This equipment entirely Bri- clul stowage for the three Mar- tish in design and development
GAS-TURBINE LOCOMOTIVES
Marcon Works at Chelmsford. vision equipment is designed for cock and Co., the locomotive
The Marconi
The Metropolitan-Vickers Elec Mark II tele-trical Co., Ltd, and Beyer, Pea-
kets, and the Mark II C is de-new the British and Continental, mar- builders, have jointly formed signed for the American market Vickers-Boyer-Peacock, for the company, Metropolitan- conforming to the American re- manufacture of gasturbing. Toco quired standards both electrically motives, as well as diesel-electric and mechanically.
engines.
CALL AROUND THE WORLD
you'll find-
SLOAN
FLUSH VALVES.
There are moro Sloan Flush Valves sold than all other makes combined.
Agenta
ANDERSEN, MEYER & COMPANY, LTD. DAVID HOUSE
GRANY
TEL: 28091.
If you can drive
with a V-BELT you can drive it BEST
with
VEELINK
Mado
in
'All Standard Sizes.
Fits All Standard V-BELT Groovos.
Available in Standard 100-foot Reels.
{
Sole Agents-KIU FOONG TRADING CO.
20. Connaught Road, C.
Tél. #8403
Byn
YU TUNG TAI LTD.
ENGINEERING
adquarters in Hong Kong:
Keep "out the damp...
with FORTEX
CEMENT
WATERPROOFING PAINT:
IT'S A SissonS PRODUCT!
WOODROFFE & CO. (FAR EAST) LTD
Wall Clocks
Junghans
CLOCKS
METAL OR WOODEN CABED
Boudoir Alarm Clocks Dial Clocks Afarm Clocks • Motor Car Clocks Mantel Clocks Kitchen Clocks » Travelling Clocks & Office Clocks Miniature Alarm Clocks & Ship Lover Clocks
SMART CLOCKS FOR THE MODERN HOME ASSORTED COLOURS. CHROMIUM PLATED
EGILT AND IVORY ETCURATE AN
STOCKS, GARRIED.
INDENT, ORDERS TAKEN.
THE HONGKONG CHINA MERCANTILE CO., LTD.
York
refrigeration air conditioning
REFRIGERATION
ICE MAKING
AIR' CONDITIONING
Sole: Agenter
THE JARDINE ENGINEERING
CORPORATION LTD.
KONO
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