1924-11-19 — Page 9

THE HONGKONG TELEGRAPH,

Have you seen the

1925

BUICK

LIGHT-SIX ?

Equipped with balloon low pressure tyres.

DEMONSTATION BY APPOINTMENT

TELEPHONE C.1036

HONGKONG & KOWLOON TAXICAB CO., LTD.

CIGARETTES

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Preserve and Decorate the the Woodwork of Your House

with

TIMBORITE

WOOD PRESERVATIVE AND STAIN COMBINED

in

Three Shades of Brown

and

Three Shades of Green

STOPS

Dry Rot, Decay and Destruction by White Ants

Tint Cards and Information from

Wilkinson, Heywood & Clark

Alexandra Buildings.

Tolophono, Central 763.

LIGGET MYERS TOBACCO CO.

NATURAL COLD STORAGE.

WEDNESDAY, NOVEMBER 19, 1924.

RÁDIÓ NOTES AND NEWS.

ii

The Advance of Wireless.

When it is realised how but one company arrived at a wonderfully minute are those solution of the problem in quite a electrical impulses which con- (novɑl-manner. stituto radio telegraphy or radio As is well known to all students telophony it becomos immodistoly of acoustics tho loudness of a noto apparent that the apparatus is due to the amplitude of the designed for thoir officient recop-vibrations producing the noto. tion and detection must be caro- In the now loud sponker, the fully planned and constructed diaphragm of the electro-magnetia with mathematical precision. mechanism is coupled to a large Much of the earlier apparatus | but light diaphragm made of fallod in this rospect. It was, parchmont watorini. Ingrossod rushed upon the market to mootarou and rigidity are obtained by a suddon" demand, and in many pleating this material so that it instances without any idea of boars resemblance to a circulari corroct design. It is pleasing to fan, the outside odgo of which is note, however, that much of this clamped in an aluminium rim. shoddy apparatus has consed to When the metallic diaphragm is. be thrown on the market, says got in motion by incoming ofcotrio London, commentator.

impulses, the large pleated diaph-

POWER STATION OPERATED BY RADIO.

Throughout the whole range of ragm vibrates with exactly the radio apparatua it is apparent samo frequonoy, but since it has that ufliciency, workmanship and a much larger area the vibrations preformance have boon the con-havo a much greater amplitudo stant aim of certain British and loud speaking is the result. manufacturors. A lino range of Quito different in style fron receivers, telephonos, loud speak-the above, novorihotess, a perfect ors and component parts wore loud speaker, is one on the small displayed at the British Empiro side, standing only 13 in high. Exhibition. Detailed examination and having a flare diameter of 7 of any of these classes will revonlin.. but even it tiny it is capable very minute attention to design, of giving a very good account of oven down to the smallest parts. itself. It is admirably suited for Variable air condensers shown ure in rooms of ordinary size, prosent many points of unusual which It comfortably fills with intorost to experimentors. With reproduction of tho bigbost the storeotyped pattern of con-quality. Sold at a price which le donsor using somi-circular/vanos, scarcely more than that of a pair the rate of change of wave-length of good headphones, it is claimed is vory rapid at first and then to be the ideal loud speaker for rapidly slows down, with the the person of limited means. result that must stations comú in about 60 dogroes of turn of the dial and vory little distance soparates the B.B.C. stations operating on lower wave-lengths. A further point is that the minimum self-capacity of the condenser is rather high. In the "Storling" air condensers special. ly shapod moving vanos ure used. Those are so mounted that the wave-length increases by 4 aimount proportional Lo the amount of turning and, therefore, the wave-rango is spread equally over the 180 degrees of turning The advantages of this type are obvious, Tuning is very much more easily accomplished and is more exact, the self-capacity is negligible and, therefore, the condonser gives a greater range of tubing with a given coil, and if the condenser settings for two soparatu stations are known, any othara may be found from these. Some of the Storling condensors are fitted with a two-plate vornier electrical and radio history was attachment controlled by a sub-accomplished recently." sidiary knob. This relinement

John Ferguson, manager of

Achievement of Well Known Engineers.

Baba used to open the don of the The Open Sesame," which Ali, Forty Thieves, is rivalled in the to control and operate from a use of high frequency radio wavey distant point entirely without attendants, a complete electrical station, at Tipton, near In- dianapolis, U. S. A. supplying all the light and power requirements of a city of 10,000 persons.

of a system of selector relays to Through the special designing operate with the automatic duplex carrior current telephone receivor already installed at the station,

the foot which

makes how

is much appreciated when tuning operation of the Indiana Electric. in distant stations,

cooperated with

in

Corporation

and it was installed under the supervision of Mr. Ferguson and C.A. Boddie, Westinghouse engineer, who is the inventor of

The latest square law condon-engineers of the Westinghouse sers are double and triplo units,

Electric & Manufacturing Como- respectively mounted as single any in designing the apparatus assemblies, In theso coudensors all the moving plates aro olectrical contact, but tho sots of fixed plates are insulated from each other. They are specially useful in controlling two three stages of high-frequency amplification.

RADIO REALM.

New Load Speakers,

It is

or

tho

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Glazos

Builds

Happy -Babies

11

LES ELEGANCES de PARIS

8, Queen's Road Central. Tel. C, 388,

Just arrived from the most

FAMOUS PARIS SALONS A large consignment of TRIMMED HATS

at moderate prices.

Inspection cordially,

invited.

HONGKONG HARDWARE CO.

"TAI LEE CHAN."

ESTD. 1884 HETAL GOODS aud Tel. No. C. 1993. ·

HARDWARE.

119 Jervois Strant

automatic duplex -carrior current receiver and transmitter. by the Northern Indiana Power The city of Tipton is served Company's transmission linos connected to a large transform- ing substation located at the wostern city limits, In order to insure that the electrical supply will be without interruption, two transmission lines from different! Bourcon of power are used-the One very noticeable feature of Kokomo and Noblesville power Wembley was the ever-incrousing plants, respectively. If either of intarost taken in the various those transmission lines should| oxhibits of radio apparatus in the bacono interrupted by reason of this event, the Kokomo operator controlled by this infinitosimal Palaco of Engineering.

electrical storms, the supply can immediately sends out a sorios of force, the toate have shown that Radio is rapidly passing the be rosumed immediately from the high frequency waves which instead of dialing a number with novelty" stage. No longer is it alternative source. regarded morely in the light of the operation of the oil switches connected to the defective line apparatus is so sensitive that oil Heretofore. opens up the oil switch at Tipton the finger, the radio controlling pleasurable pastime, but rather to change over the source of and closes the oil which is con- circuit breakers could be actuated The largest cold storage plant as a desirable institution. So supply has necessitated the connected to the reserve line, the by the human voice, and that the is believed to be the natural one much has boon accomplished in stant prosonce of substation entire operation boing completed modulation could be so arranged at Zack, a railroad atation be-technique of broadcasting during attendants, who have received in a few seconds. tween Marshall and St. Joe, Ark.to prosont year that the standard their instructions for operating

that the foot of Ali Baba . In ansas. A cavo, 100 foot wide and of

The method by which this is oponing the cavo by the words modern transmissions is the switches by long distanco accomplished is as follows: The more than half a mile long, has now very high.

now telephone.

Open Seadme" could 'bo' operator at Kokomo dials boon suitably provided with doors possible to enjoy to the full tho Telephone systems, however, certain

duplicated. It would.be possible number on A and bins, and is found to be ad-rendering of music and song, of are even more vulnerable than phone

tolo actually to adjust the apparatus, of - special design so that the oporator at Kokomo. mirably adapted as a place for pore and play. Improvements power lines to the notion of similar to au.. automatic tele-nood only say the words." Open, farmers of the vicinity to keep made both in transmission and the elements and power coin-phone. This tolephone dial is circuit all kinds of meats, vegetables, cooption have draun in more and panios in the past have been connected to a radio transmitter breakers, 25 miles away would fruits and other perishable pro- more devotees to the shrine of unable sometimos to render con- and the action of dialing sonds open. ducts. Cold air from a subter-radio, and every day brings in its tinuous Barvico during storms. out a series of modulated radio rañon passage haintains a tem-quota of now listeners.

The engineors of the Northorn impulses the peraturo sufficiently low to make: Liko all

atonna at rovolutionary in- Indiana Company have felt that Kokomo. Upon receiving those a useful yent-round storage room, novations, and truly radio was present day requirements of aloo- impulses, the atenna at the Tipton such, much criticism was levolled trical supply demanded standards station leads them down to a five The importance of the battle-at the initial results, especially of continuity higher than have tube radio receiving eet and am- ship was emphasised by Admiral the earlier receptions of music beon possible heretofors. The plifier, where they are multiplied (Saskatchewan) announces that Sir John do Roback in replying on loud speakers. Undoubtedly presont substation at Tipton, the in volums while still retaining Chief John Smith, the only re- to the toast of the Imperial much of it was bad-partly operation of which is goveroned their form characteristics. They maining Indian chief who signed Forces at the dinner of the through deficiencies in apparatus, entirely by high frequency waves, are then carried to a series of the first tinaty batwoou the now Incorporation of Maltmon at in transmission, and in no small is the result of their efforts and selector relaye, which in turn Dominion and the Indians in 1876, Glasgow. He said the Navy was degree to inexperienced opor- this now station marks a now or operate the storage battery has died on his reserve at the ago. a vital factor for the commerceation. During the past months in electrical development.

switches which actuato, the oil of 99. of Great Britain. He hoped the large amount of thought has. The station is controlled by two circuit breaker mechanism. A people would realise that they been devoted to the problem of massive oil circuit breakers of special wave length, entirely out- FUJIYAMA RAILWAY. must have ships. Some people natural reproduction by the loud 73,000 volt, 400 ampero rating and side the broadcasting range, is told us that the day of the battle-speaker and, since the modern a rupturing capacity of one and used and the series of impulsos is build a cable railway up Mounts Application for, pormission, to ship was past. "Do not believe commercial, receiving sot gives one half kilovolt amperes. Those as complex as the combination Fujiyama (12,000 ft.) has been that," said the admiral. Tresults, which are to all intents circuit breakere are connected to look of a safe and in no way sub-filed with the Japanese Depart think I can assure you that if and purposes distortionless, the the transmission lines, one from foot to extraneous influences. monta of Home Affairs and Rails were sprung upon us to-orux of the problem lies in the the north and the other from the The tests just completed have ways by a group of Tokyo depa morrow, a naval war, wo would reproducing instrument

If either of these lines demonstrated that the apparatus tallats. The Government has not have the same fear of the Much experimental work has develops any trouble, it is in works with infallible accuracy, ordered a survey of the mountain's submarine which we had in the been done in improving, the constantly observed on the power sarly days of the last war,"

ventional type of loud speaker, house instrument at Kokomo In nature of the apparatus which is necessary permite);

Notwithstanding the massivo slopes preliminary, to issuing the

BELIEF IN THE BATTLESHIP.

war

J

itself.south.

to

broakers," and the

DEATH OF OLD CHIEF.

A tologram from Prince Albert,

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