YUET SANG ENGINEERING CO.
Manufacturers of all kinds of Printing Machines, Guillotines, etc., etc.
TRADE MARK
Apply for full particulars without obligation.
171. Queen's 'Road East. Tel. 31838
Head Office: 112. Kwong Fook Road C. Canton,
THE GREATEST NAME IN RADIOŠ
"AMBASSADOR"
Britain's Most Advanced 1947 Receiver
The Superhot Five-Volve Three Wave Band
Fully Tropicalised
Cabinet Size 19′′ x 12′′ x 8-1 2"
Controlled Price HK$360 only
Produced by R. N, Fitton Lid., Radio Works Brighouse, Yõrks Leading Manufacturers in the Radio Field.
French Bank Bldg.
SOLE AGENTS:
K. CAUDRON & CO.
ALUMINUM
TRAVEL CASES BY
TEN
MATCHED MODELS
Phone: 2753f
1
THE CHINA MAIL THURSDAY, SEPTEMBER 18, 1947.
ENGINEERING: Continued from Page Eight
ATOMIC PROPULSION IN FIVE YEARS?
;
Ambassador To Radio Listeners
By Frank Davis,
Of United Press
Within the short space of five years, ships larger than the "Queen Elizabeth" could cross the Atlantic faster using less than a teacupful of fuel.
radio receiver which proved Lloyd Trefethen, an American research engineer experimenting at Cambridge University, pre- dicted recently that the most immediate pro- mise in the application, of atomic energy to industry was ship propulsion."
Its worth 10 the searching test of war, the British-made" ""Ambesan- dur. in now available in Hong Kang. Produced by R. N. Fitton Ltd.. fane of Britain's leading culto manufacturers) in their
A uraylum pile-expatito-of-| inachinery desigent to operate works at Brighouse, Yorks, the
em generating_a_million times "Ambassador for 1947 he met heat as an equal weight in stallog two machines for one a for a number of years, and in- bodied in it all the features developed through the research oll-- replacing machinery and and experience of the war year the tons of fuel used in oil
It is a 4-valve plus rectifier
burning ships would form the three-wave-band superhet receivėr
In the appllentiun of the
in the event of one falling, or
(2) by the use of remotely con-1 trolled repair facilities.
Economic Obstacles "That there will be atomle passenger and cargo ships in the future sec
certainty,"
with automatic volume controw power plant, and, of course, variable tons coll- trg. Superir electrical and me-energy generatest, however, the chanical construction, employing conventional ship's propelling advanced technique, has gone inta unit would be utilized.
sald Trefethen. "At the moment, jevery stage of the net.
A fluid circulating through however, there are cronumir From the technical int of the uranium pile would plek up obstacles which teasen the vw, the set has a power outpatient, emerge from the pile andcentive to develop them. Atomie of & watts maximtimi at 7 per vent be used to boll water. This in distortion: alolate sensitivity at 22 Mics 16 uv: GM/en, 20 Image respulse at 15 M/en better than 29 Db.
Munted in an Australian Walnut cabinet, tropically treat. et with bake!lle escutcheon, the set has provision for a grasi jhone pickup as well as extension speaker »rkets with switch.
tn.
would
RADIO and
ELECTRICAL
COMPONENTS
Paga 9.
and ACCESSORIES
including:
"SKYROD" and "ELIMINOISE” .
Anti-Interference, pre
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Communal Aerial Systems
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BELLING & LEE LTD
Sule Agents:
east more to build and operate GILMAN & COMPANY, LTD.
tam would
form steam, the power plants for ships steam run a turbine and the
than the machinery now in use turbine turn a screw which
In our ocean-going vessela. would drive the ship.
"For naval ships, cost is m Trefethen anld, however, that
chala reaction-su necessary efficiency can, be improved, and secondary laclor if the fighting in such a pile-will only occur it would appeal that atomic when a definite amount of fis- sióhable material,
energy can radically improve a critical
ship's fighting efficiency." mass, is present,
Most battleships have in- ok abut stallations
200,000 ike but
“Moderator"
Retailing at only $300, il probably the best "bug" in its price and rhuge class on the waar- ket. Incorporating as it does many features normally found unly on But by using uranium 235 in much more expensive receiver. its natural deposits (which nino For instaner, a special feature-theludes uranium -238) acting
pile can be bulli, although its
the region of is weight-in
tons-precludes thousand
immediate uge In ships.
a ita
horsepower, to give them grentent possible "power, this has imposed limitations on operating range and re-power, An atomic power plant eliminate the imitations, how- ever, giving the ship power in run indefinitely at high speeds and expand its range.
Limitations
will
But the more power built in- the ship, the more the ship will weigh,
is the "Extended Tuning Scale" as a “moderator", an atomic
100 des band-spread, 'to him. plify the logging of shirt wave stations This extended senle divided into eigth Metre Bands ant all the principal short-wave *tations are named and allocated n number between 0 and 99.
Philadelphia, for example, has a transmission in the 31-metre band. To tune this station, the tener adjusts the main pointer in the short-wave seale band to the 31-metre zone. Reading along the extended scale, he ses that the number allotted to Philadelphia 14 20.5. He readjusts the main poin. Fier until the rolating band aprend dial reads 20.5-and at this point, providing it is on the uir. he will receive the Philadelphin broadcast.
A "moderator" ส any material setul to slow down neutrons so they will split other' neutrons rather than penetrating them harmlessly as do the fast-to moving neutrons. Graphite blockH were used a moderators in all piles so far bullt. Heavy water could be used.
Local agents are K. Caudron & Co. in the French Bank
Building (lelephone 27639.)
"Paludrine"
re-
the
of
I, therefore;t` (hink," said Trefethen, "that while the atomically propelled ships the future will run
at high speeds, the limitations of ma- chluery weight will prevent racing the aeroplance
Therefore, a, necessary duct must be made in weight of a ship's atomle pile. their. But this is only possible by us- ing a smaller mass of a rich mixture containing a higher proportion of active fissionable
material.
Scientists may be able to can struct atich a rich pile that the "moderator" the cause of the vaat weight-will no longer be
"Paltidrine," the only really needed. effective synhetic anti-malaria remedy, is now being manufac-
Major Problemi lured by Britain's Imperial One of the major problems Chemical Industries in such yet to be solved is the extraction quantities that 100-tons can be of heat from the pfe. Various
overhead."
Already the design for alomle ships is forging ahead, but im- proved techniques of propelulon, the production corta. must be adapted first to lower Gradual improvements are being made in for a useful purpose so that n harnessing so great an energy
speedy and economien! meana of ocean-going transport will be forthcoming.
.for
A continuous rolling mill for the mass output of aluminium
exported annually. Just under methods have been attempted, ALUMINIUM SHEET two years ago production was including the circulation of nii. The three chemlats, Dr. water through the pile. Helium F.H.S. Curd, Dr. D.G. Davey Kas its also been tried, and Mr. F.L. Rose, to whose helium absorbs heat and is not sheet products in quantities un.
by the Intense joint research work the world affected is indebted for this wonder drug, radioactivity inside the pile. have been awarded the British
Once the heat energy has been
paralleled in Britain is now under construction. on a 100-acre sile at} Hogerstone, near Newport, Mon.)
rolling machines will be more
Society of Apothecaries' Gold extracted from the atomic pile, mouthshire. The main series of
Medal.
Halliburton
WORLD'S MOST
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KING'S BUILDING",
said Trefethen, the problems become a little less complicated. than a quarter of a mile in length: Steam will be used in the first and the cost of the plant and atomic energy, plants because equipment will represent an in. the existing standard type, of Vesiment of more than £2,500,000 steam equipment is well known, by the Nothern Aluminum Co...
Lid. Later the heat from the ship's atomle pilo may be used to drive gas turbines operating on the same principles as those in jet-propelled aeroplanes.
Once the problem of propul- ston has been overcome, thure remains the question of protec-2 tion for the crew from the deadly radiations. A ableld of solid steel at least six feet thick, and weighing about GO tons, must be placed between
the pileno matter how emall
and the men, .
land
Nautical Uses Obviously such a weight for exceeds that which could *be carried by a plane or transport But as it is envlly conveyed by even the smallest of cargo ships it therefore lends first rate importance. to the nautleni - uses of atomle energy. Through- the corly design of otomid ships, experience may be acquired which will evan- tinfly lead to a smaller power. unit, capable, of being,installed in aeroplanes and locomotives. ⠀⠀ One of the most difficult pro-1 blems facing the atomleship designer, said: Trefethen, is the maintenance of the atomic, pilo and machinery. In the event of a breakdown, it would be unsafe for the ship'a crew to enter the protective shield, even when the atomic pile is shut down, for endio-active by-products, are al2 Ways presented m
( This matter can, however, be za tackled trons several points - hes | Recon (1) By the hse of minttliche!
1
ENGINEERING DEPARTMENT
Fidelity Control
.. an exclusive, new feature in the great new range of Philips Radioplayers.
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CENTRAL RADIO & ELECTRIC CO.
60 Nathan Road. Kowloon.
Telephone 53814.
ONE OF THE MOST ATTRACTIVE
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“Davld House Te), 25540