1923-11-10 — Page 14

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O F

THE HONGKONG TELEGRAPH.

THE WORLD OF RADIO.

SATURDAY, NOVEMBER 10, 1933-

How British Inventors Lead the Way.

This is not all, because the

Kinks O

The Links

A Statement has been made

SCOPER so largely, on Question in playing: bia that there is not a single British device patent which is the basis of any account of its extreme sensitivity, second shot Smith's ball hits' that of the circuits in Figlish broad-coupled with its faithful reproof his opponent, driving it across can a creek crossing a fairway Both `cast transmitters. This statement duction. The sensitivity

is grossly at variance with the be made almost anything, and balls come to a restà considerable the bigger microphone distance on the other side of the facts, says a writer in Popular with Wireless Weekly, and to prove which is being perfected to-day it areek. What is the proper ruling this I. propose to go through the is possible, with three or four on such a happening? Is there capacity any penalty because Smith's ball various circuits involved in a stages of resistance

voltage came into contact with that of his broadcast

a magnification, with a transmitters typical example, the one in Lan-magnification of only about 100 opponent? Should the two play- dou-and to point out that nearly to speak-fire or six feet awayers play their next shot from the all the basic circuits have been from the microphone and to get lie across the creek?

Answer:-There is no penalty thought out and patented by very faithful reproduction, which,

compares favourably with any because Smith's ball came into Englishman.

It is logical to start at the microphone of the same type contact with the ball of his oppon- beginning, and the first patentable invented and perfected in other ant Smith's opponent should countries Add a certain amount replace his ball as near as possible apparatus is:-

And magnification,

it to where it was when his by The Microphone. The micro-more phone used at the London station is possible to talk across a room Smith's bali. Smith should play is the invention of Mr. Sykes, an 40 ft. long without distortion and his next shot from the resulting

The principle of with sufficient sensitivity. Englishman.

is

a

lie across the creek. A

Question: What is considered

par for the longest possible hole on a golf course?

Auswer:-Holes that are

Fear.

Question: Is there any penal- ty, if in stroke competition a player through a mistake plays a stroke with a ball other than his own?

the arrangement is very simple. Owing to the great sensitivity dat coil of the arrangement it is obvious It is simply that a

suspended in 1 magnetic that the spurious noise andemic becomes avery magnifier Eeld. The sound impinges on to the flat coil and moves it. Small smaller and smaller compared voltages are generated in the with the disturbance it is desired distance of 576 yards and upward coil, and these are taken to to receive. Thus, whereas many are considered perfectly played a transformer of large step-up microphones invented in other when done in a 7.

Question: How many native- ratio which is put on the input countries suffer very largely from side of a resistance capacity, low-spurious noise if the speaker born Americans have won the

is far removed from the micro-British open title? - frequency amplifier.

microphone can A WONDERFUL MICROPHONE, phone. this

Answer-Walter Hagen is the of the give faithful reproduction with-only homebred golfer to capture The ingenious part device, however, is bound up in out spurious noise under the same the British championship. Hagen the necessary corrections that conditions. It is thought that it was a victor in 1922 and came bave to be made. If the voltages would not be possible to give within a stroke of repeating this geserated by this arrangemen: Shakespeare plays with such were simply amplified up. ipertection as have been done tan be proved by a simple from the London studio with any mathematical analysis that the microphone other than the Sykes, ICE-CREAM.low frequencies of sound would British invention.

be given great predominance over Leaving the microphone now,

one comes to the- the high frequencies that is to

Broadcasting Transmitter Con- Answer: There is no penalty say, the microphone does not faithfully reproduce the sound astrol System. In order to make if a competitor play a stroke with we hear it, and a correction must this function properly, it is a hall other than his own, provid- necessary to supply high-voltage led he then play his own ball. be introduced.

Thus, in the first stage of the energy, and rather than build However, if he plays two con- ga-secutiva strokes with the wrong] amplifier, an inductance of small 10,000-volt direct current impedance value compared with chines, which are expensive and ball he is disqualified the valve is connected in series possibly unreliable, it is more Question Player's with the anode cirruit of this practical to rectify alternating resting on dry ground but is lying valve which, it must be under-current at high voltage and then

the water seriously interferes stood, has the input transformer smooth this to what is practicallyo near some casual water that contected across its grid and D.C. by a system of chokes and with the player's stance. Player filament. The voltages generated condensers. The rectifiers were finds that it is possible for him to across this inductance will be invented, as everyone knows, by

greater for much

high fre Prof. J. A. Fleming, an English-Properly play his next stroke be cause of the water. What are his There is absolutely no quencies, and proportionally less man.

AnswerWhen casual water and less as the frequency gets doubt of the validity of this rights in such a situation? lower.

patent and it has often been Then, combining the effect of a questioned whether, the three-interferes with the player's stance microphone which is to give pre-electrode valve patent is not cover-the situation is treated just as if dominance the low frequencies ed by the basic Fleming patent of the ball was actually resting in with the effect of this differentiat-using a hot filament and a plate casual water. The player has a ing valve which is to give pre- to produce a thermionic device. dominance to the high fre- quencies, the result is a uniform ope inasmuch as the two effects cancel out, the resultant being a

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Turning, however, to the:- High-Frequency Circuits, it will be found that basically these! rely

patents. English upon

For the peculiar conditions

Bry

2

ball

is

right to lift the ball without penalty and drop it as near as possible to the spot but not nearer ihe hote, and thereby get away from the casual water that inter- feres with the player's stance.

ANONYMOUS GIFIS FUE RESEARCH.

of broadcasting it is necess- As a result of the appeal for

ID haye

high-the British Empire Cancer Cam- frequency systém which is in psign, nearly £55,000 has reached herently stable, so that if the the offices of the British Red voltage coutrol varying in sym-Cross Society. Berkeley-street. pathy with the voice exceeds a W. I. More than half the total certain amount, the high-frequen-aumber of subscriptions have cy circuits shall still continue been anonymous. The fund at to function. To do this, a system its inception received an anony- called independent drive is used. mous gift of £20.000. There has which basically relies upon the been also one anonymous gift of existence of a closed oscillating £2,000, two of £1,000, three of circuit the voltages from which £500 and many others of smaller are induced across grid and fila-amounts, which bring the total ment of the main oscillator. in of anonymous Subscriptions to contradistinction to the method) £28,000. wherein the periodic voltage be-- tween grid and filament of the main oscillator are induced by a transformer coupled to the main A.T.I.

only failed because the plaintiffs

Finally, what

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Independent drive has been based their action too wide THE HUMAN ZOO found extremely useful, in fact, claims. almost necessary where full con. In strict justice, the patent of trol is given, and it was invented the cylindrical anode is & British by an Englishman... The main patent. Again, talking of valves,, oscillator has in circuit a grid did not Prof. Fleming first leak which automatically gives a suggest tungsten filaments for negative bias to the grid fila-valves, and are they not in com- ment potential. In conjunction mon use to-day? with fine mesh grid valves, the

about the grid leak raethod enables the fundamental Marconi patent? For radio engineer to expect efficien-fourteen years the famous four- cies far greater than the theore seven's palent. gaye to the tically possible maximum of 50,

Marconi Company viroually e per cent. The grid leak given us

all wireless monopoly in certain cases efficiencies above telegraphy, and this monoply was 90 per cent. The grid leak for based on a patent, which was transmitting valves is a British

upheld time and time again in invention.

many courts, the patent being that of the ordinary high- frequency circuits, in common

THE GENIUS OF ONE MAN. Turning row to the

ہیں

obe must

Valves themselves, it is true use-to-day.

Lastly, when one thinks of all that the three-electrode valve was essentially a Lee de Forest pat-the inductances, transformers, ent, and Lee de Forest was an direct current and alternating American; but is it pot true that current machines, Łasically the construction of realise that they all came owing every transmitting valve in alto the genius of one man, an broadcasttransmitter, as first used Englishman-namely, Michael in London, was first proposed by Faraday one of the would's

greatest geniuses. An Englishman?

In a recent case in the court, The only valid foreign patent the judge gave it as his opinion used appears to me to be that of that the patent of the cylindrical choke control. Nearly alf the arode and the enclosed finemesh rest, at least the fundamental grid was valid: The patent action ones, go to Englishmen.

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