1928-01-21 — Page 11

EVER HAVE TROUBLE WITH YOUR RIMS?

TRY: THIS.

HONGKONG HOTEL GARAGE.

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25. Queen's Road Central. Telephone C. 4759.

There are nobetter in Ilongkong for the money. FRACNIS AND BARNETT Cycles

From £36:0:0 up.

DOUGLAS E. W. From £59:0:0

TRIUMPH MOTOR-

CYCLES From £60:0:0 up

INDIAN MOTORCYCLES From $245.00 i1j),

A.J.S. MOTORCYCLES From £61:0:0 up.

ACCESSORIES

John Bull Line of Rubber goods. Complete line of Accessories for Cycles and Cars.

ALEX. ROSS & CO. (CHINA), LTD. Prince's Building, 2nd Floor. Ice House Street Entrance. Showroom No. 1 Chater Room.

AUTOMOB

ROYAL

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Fren Mechanical Advice Associate Membership of the

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All Communications for Membership etc. to REV. GE S. UPSDELL Hon. Secretary,

P.O. Box 116.

THE HONGKONG TELEGRAPH,

SIMPLIFIED GEAR

CHANGE.

Overcoming New Obstacles.

MOTORING SUPPLEMENT.

The device is put into action or OVERHAULING THE held out of it by means of a short ELECTRICAL SIDE. convenient lever, so that when aty

any time it is desired that the car should return to its normal fixed

Efficiency."

gearing, a light pull is all that is How to Get the Utmost necessary. The effect of the tree-] wheel position is this: When the accelerator is released, both main) In spite of the stendy improve and lay shafts in the gear box

Many car owners now making) ments recorded in the design of come practically to rest, which much more use of the lighting car in almost every feature, allows noiseless and swift boninment than they did in the there remains one unit which, change. Lower gears can bo Summer may have found that the taken as a whole, is scarcely bet-engaged at any road speed, as the efficiency of the equipment, has fer than it was twenty years ago. car overrung until the engine is become reduced; the lights are It is a rare occurrence to find n accelerated sufficiently to take up less brilliant and the charging combination of clutch and gear the drive. For example, if the rate shown on the ammeter is. box which gives as easy gear car is running at a speed of forty perhaps, several amperes. down. changing as we had on some of the miles an hour in top gear, and it The battery does not appear to historic cars at the beginning of is desired to make a fast climb of have the capacity it had originally the century. The gear boxes a hill ahead, the freewheel allows and, incidentally, there is a want themselves, and to a lesser de- the driver to engage third speed of vigour in the starter. gree the clutches are very mach immediately better than they were better throttle. The car will not be general terms to want of atten-

after closing the

The cause may be attributed, in designed, better constructed, and "driving" on third gear until the tion to the equipment during the in some eases made of better engine has been accelerated up to period it has not been needed. materialbut the means for: the correct revolution figure. The The first step will be to get the their easy operation have by no automatic freewheeling which battery into good order and the

rate,

use as

an

means Improved at the same occurs during a large proportion charging rate up to its full valic. of the car's mileage is bound toIt is surprising how many neg All the conditions are, of course, result in considerable fuel Jected batteries that are sent to totally different to-day. With economy, not to speak of a saving service stations for overhaul are our engine speeds twice, and of wear and tear on the engine found to have acid in them 30 sometimes three times, as high and chassis parts. The reverse weakened by undue additions of as they were in the old cars, anfclutch is controlled se

as to en-water that it is no entirely new set of obstacles has sure smooth slipping engagement electrolyte, therefore test the acid to be overcome before we can get If it is engaged when the car with a hydrometer and see if it in that swift, noiseless gear change moving forward, the control may appreciably below standard. In which some of us can remember be arranged $0 as to prevent this case, it would be better to run with so much regret. That; how destructive shocks to the trans-the battery down on the lamps and ever, is really no excuse for the mission, and to give a gradual empty out the weak neid and reall almost universal fact that we braking effect.

with new acid of the initial gravi cannot go through the gear

ty specified either on the battery box" in the way we should. Wej The cara on which I made

tease or in the manufacturers' are now so accustomed to having personal test of this very in-charging instructions booklet. lo double declutchan opera. tion, if analysed, decidedly comlar 14 h.p. four-cylinder and ʼn

teresting invention were a popu The next step will be to charge

the battery. plicated-that we forget that its 12 h.p. four-cylinder. The former necessity is a confession of fallare hatin three-speed gear box and af

The Dynamo Brush Gear. en the part of modern gear hos light flywheel, and the latter af designers.

The vital part of a dyname is four-spived box and a heavy fly- the commutator, with its brush wheel. With the former, changes gear; hence manufacturers pro- Some devices were shown atup or down by means of the vide comparatively easy access to Olympia this year, designed to patent clutch could be effected this part. The conditions for obviate these drawbacks, one, of far more quickly than with the efficient working of the commuta-6 wirlch. the

Humfrey-Sandberg latter. The reason for this wastor are that it should be quite freewheel clutch, I have recently that the engine with the lighter clean, there must be no greasy had an opportunity of testing, flywheel reduced its revolutions film or discoloured places on it fitted to two totally different types on the throttle being closed much and the brushes must press on the

(writes Juha Priolanu more readily than the engine with commutator with just the neces in the Observer.) 1 found it a re-the heavy flywheel. Apart from sary degree of pressure. If it is {markably interesting device, and, this, however, there was no dif- too light there will not be perfect so far as could be judged from a ference in the operation of the contact; and if it be excessive it brief trial, completely successful device. With the second gear will wear out the brushes and in With the clutch in setion, gears one had to wait perhaps three or time will "groove" the commuta- can be changed either up or dows, four seconds longer for the motor SO that an expensive at any speed at which the turment when the gear lever could be machining operation will be neces- tay be moving, without dis- engaging the clutch and without Pushed into any one of the posi-sary to get it into good condition again. For cleaning the commu- making any noticeable sound. #il

tator it will suffice to press on it, Actually, this invention may be The sensation of driving with whilst the dynamo is running, a said to reduce practically every the Humfrey Sandben clutch is piece of soft, clean rag on which) gear box to the same level of ease remarkably pleasant. The car a few drops of paraffin have been

f var

of operation..

1

tions.

"

藏

SATURDAY, JANUARY 21, 1928.

LET US GIVE YOU A DEMONSTRATION OF THE -

FIAT 509

READY FOR DELIVERY AT ANY MOMENT

PRICES $1,850 Roadster $2,050 Torpedo.

SPECIAL EQUIPMENT INCLUDED.

Sole Agents for Hongkong; Canton and Macao

SOC. ITALIANA. IMP. ESP, ESTREMO ORIENTE, LTD.

Manugers-A. GOEKE & COMPANY.

appears to run unusually smooth-placed, then go over the surface 50000000000

ly and noiselessly--which, indeed, with two or three changes of clean!

-The clutch consists of-twa con- is practically the fact. So much paraffined rag. Do not use petrol centric riembers, between which freewheeling is done in the or-or the rag, as there are inherent lie cylindrical rollers set at apdinary way of driving that the dangers in so doing. angle to the axis of the shut engine, is actually working what)

The surfaces are so formed that seems to be about half the time) It is just possible that the the rollers make full line contact it would be with a normal fixed-brushes will require renewing-ı on each member when in this rear car. Further, owing to its set should however, last for 6,000 akowed position. Normally, the so often running light, the ormiles-but in any case new te members are kept in contact dinary noises of either engine, brushes are easily fitted in. What with the rollera by means of light transmission, or common rattles, is known as a pig-tail" attached spring pressure which means that are greatly reduced. A point to each brush, a flexible copper ally in one direction of rotation, there was no sensation, as I ex screw on the brush holder from engagement takes place automa- which interested me was that connexion, has to be fixed to a

and disengagement in the cpp-pected, of the reduction of brak-which the old one has been de- site direction as one member ing power. Actually, there must tached. Be careful to use only moves towards or away from the have been, owing to the absence, the replacement brushes supplied other. This is the freewheel of the effect of the engine com for the particular make and type action The complete outfit con-pression, but it was unnoticeable of dynamo. Before putting on sista of two clutches with opposite | The clutch. I understand, is the end cover of the dynamo and directions of engagement fitted to being adopted permanently by whilst it is not running examine the propeller shaft between the one or two British makers, and round about the commutator and rear box and the back axle-others are giving it a careful brush gear for carbon dust and actually in practice, inside the trial. I was informed that the remove it by means of a stiff rear box itself, which is built to extra cost when it is originally bristle brush. Assuming there is accommodate them. They are bull into the gear box, is so low no radical fault in the dyname, quite small, being not more than as probably not to affect the price should now show full charge about four inches in diameter. of the complete car to the user.

ACCORDING TO

VIEWPOINT.

HOW A SIGNALLING » HAND FEELS —–—

AND HOW

IT LOOKS

rate: Of course, it must not be overlooked that there are still many belt-driven dynurios in use, and the necessity for having" the drive efficient should be self- evident.

The Lighting System. With the dynamo and battery put in good condition, the rest is a matter of detail. Suppose the head or side lights are not equal, have a look at the bulb that is not showing a wood light; it may have blackened or not be making proper contact in the holder, due to car-i rosion résulting from damp. The bulb contact and plunger in the holder should be carefully scraped quite clean. In some case it saves time to put in a new bulb to get [equal brilliancy; the old one being kopt for an emergency. The tail lamp is apt to be neglected, there- före it is as well to overhaul it.

There should be no necessity to have to do anything to the awitch- box or cut-out. The adjustment. of the later is permanently set by the manufacturers and is not in- tended to be altered except when actually necessary, and then only at the manufacturers' service station. It is not impossible for a loose connexion to occur, but [any detail of this description should be very carefully handled.

TUBES WELL PATROLLED.

One hundred and eighty, mea are used in two-hour shifts to patrol the Holland tunnel tubes. under the Hudson river. These men undergo a heavy strain while watching the four miles of under-| ground tubes.

"

16, Des Voeux Road, Central.

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19, Queen's Road, Central

Telephone C. 1210

CHRYSLER MODEL NUMBERS MEAN MILES PER HOUR