1948-01-22 — Page 8

THE CHINA MAIL, THUR SDAY, JANUARY 22, 1948.

VERRERIES DE FAUQUEZ BELGIUM

Printed Figured Opal Wired Glass

Marbrite

Belgian Sales Agency "F. De Jong" Neem G---French Bank Building.

THE JARDINE ENGINEERING CORPORATION LTD.

RELIABLE EFFICIENT FAST-WORKING

Wolf

ELECTRIC

TOOLS

ORILLS: BENCH, HAND & LATHE

GRINDERS 2 SANDERS, ETC.

ELECTRICAL AND MECHANICAL ENGINEERS AND CONTRACTORS

14.16 PEDDER STREET. HONG KONG,

Telephone 20311.

FOR

FORMOSAN

PRODUCTS

INQUIRE FROM

司 公 康永

GEORGE LIN & COMPANY

202 BANK OF EAST ASIA BLDG.

TEL. 34108-22651

TEA, BAMBOO, CAMPHOR. STRAW HATS,

ENGINEERING PAGE

Captain Cook Graving Dock

For a maritime country such

as Britain it in obviously of the first importance that adequate for re- dry docking facilities pairing the largest liners and capital ships should be avail able in all parts of the world. The existence of such docks not unly reduces the time that a ship is laid up and the con- sequent loss of revenue and in- terruption to service, but also eliminates the danger of a ves sel's having possibly to make a protracted voyage in una UNAPA- worthy condition.

Valuable as such facilities are in praer time, their impor- lance ineTERSCA a hundred fold in war time, especially in the ense of ship operating far from their home bases, as, for exam- ple. in the southern hemisphere. and in the Pacific. For this reason, dry docks of the largest and most modern type wère con- structed with the utmost des- pich for British Comin- width bases in Australia and South Africa.

The Genera? Electric Comi- pany. Ltd. was responsible for The electrical equipment of no

Jews

TEAD.

than seven Boating and

Remote Controls These operations are effected through some thirty main and auxiliary valves, the electric

circuits

are

graving docks. A typical ex-in blocks 22 ft, square, varies to pass directly from the sea in cuting

mechanically ample of the latter is the Cap in thickness from 5 to 25 ft. takes to fill the inner and outer from the actual movement of tain Cock Graving Dock at esording to the formation and compartments, together or the valves and to connect them Sydney. This dock, which was prality of the rock at found separately, or, when emptying, back to the panel.

two floating to flow to the main low level named by H.R.1. The Duchess ation level. The

Two mechanical float operat- of Gloucester in March, 1915, is caissons which form the dock suction chamber from where ed indientars show respectively

contain as she of the largest in the Bri-gates each

much is pumped back into the sea. the level of the tide and the tish Commonwealth and is com-steel as a medium sized ocean When impounding, a sea water dock water level, thus enabling parable in size to the

take to the suction chamber the pumps King going ship.

to be operated ac- George V Dock at Southampton The new and largest of the is opened and water is pumped | cordingly. or the Sturrock Dock at Cape repair shops is 40 ft. long by buck into the dock by one of The valves themselves

146 ft. wide, the fitting-out the pumps.

eperated through gearing from The Captain Cook Dock is wharf is 40 ft. long; there are

contactor controlled squirrel motors ranging in 1.177 feet long from the outside; also powerful elvetric capstans

cage size from

15 h.p. rop of the north end to the and giant cranes, one of which

1 h.p. to It can will be expable of lifting 250

These cope of the south end.

motors, together with he divided into two sections; tons. There are three miles of

Bheir associated equipment, are the inner one, 707 ft. long, can railway trank. Ranged around drives for which require, In the

banged in underground operat- horse- craisers the Dock and along the wharves Aggregate, almost 200

ing chambers which are, in Without pwer

scheme of! # abrens, while outer one, are the necessary service facili- centralised remote controls the fact, small substations 890 ft. long, can hold two or ties, af on an equally grand

which the shafts extend down- individual operation f the This cate Numerous service pointa three destroyers abrensi,

the actual warda to

valves. valves widely separated lage basin ehtains 50,000,000) are provided for salt water and

would entail points

Each chamber is linked by tele- consider- Pallons of water and its depth fish water supplies, as well as

able labour and delay, besides phone to the central control in is 55 ft. from cope to floor at a series of welding and lighting difficult to complete dur-the pump house, and as a pre-

ing connections, fire hydrants

Bote" electrole type water level) Magnitude

and compressed air points tong the limited periods of suit- caution against landing "No-

indicators al' arranged Som den of the magnitude ter for all possible require-ingly. Gwynnes Pumps Ltd., as

ments.

sound an alarm in the main f of the project is given by the

The entstanding part played quantity of material employed by electricity in this vast m From the time that construedertaking is shown by the

ion was begun in December. 1940, to that of the initial Good and variety of electrice "peration in which the valves

are centralind al equipment installed.

in appropriate, large outing caissons are Tho 190.00) cable. ing,

yards of

A master desk vidled for the Dock gate and groups from motors driving the varions:

for separating the inner and Согда Eas

the

complete with a mimie diagram! and the electrically

for independent

neer.mulate

The extre

ssura

LIVO the

used

ות יין

from

able tidal conditions. Accord-

main contractors for the pump- ing installation, developed a pump house should water rise

electrical

As already mentioned,

scheme of

in the shafts.

FEATHERS, DERRIS ROOT, SUGAR, CORK.1k. together with about 800 poperated valves alony acerunt panel and water level indipter hasing CARDBOARD, MOLASSES, PINEAPPLE, SISALĮ play corefilling and 170,000 FL.

o rubic yards of stume and for nearly 5,000 borze power,: turs, which is installed in the operation. The Dock Is seated i

shet steel piling for rufferdam. Flo Boor, which

D|

by manoeuvring' the caisson in- pump-house.

Besides the main pumping its sloping guides in the Dock equipment, this chamber houses walls and then flooding to allow it to sink into position. TA seepage and drainage

while the step-down trans- former pucity of 6500 kVA is additional to the power sup-all the

was built of reinforced concrete {nied direct to the main motors] pumps as well as the pumps for reopen the Dock to allow the

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PACIFIC RADIO CO.

82

11

MOWLEY ELECTRIC CO,

121

++

WAHI MEI ELECTRIC CO.

135

"

ย

SUN LIGHT ELECTRIC CO.

137

19

P

MING FUNG ELECTRIC CO....

145

**

H

#1

SUN CO.

175

D

LAMS TRADING CO.

21 Pottinger Street"

TAI LIN RADIO SERVICE

300 NATHAN RD.

MADE IN ENGLAND BY THE

G.E.C

MANUFACTURERS OF RELIABLE RADIO

VÁLOVE...

at 6,000 vošta.

Made By G.E.C.

the water from the brilast tanks and hauled clear.

the fire and deckside circalating passare of a ship in or ont, the water services, together with of compressed air to discharge vinson is refloated by the use The greater part of this clec- the associated control gear and trical equipment was manufac-| auxiliary equipment. Jured and supplied by the An operator at the control

The main pumping, installation G.E.C. either as main contrae- desk, after receiving instruc-conds of three tiwynnes torizoural, ters or in association with tions by telephone from the double-inter, centrifugal dock punge manufacturers of other items Dockmaster, can carry out any designed to operate at the highest of- of the main equipment, namely required operation such as fili- ficiency over the wide variation in with Gwynnes Pumps, Ltd. who ing, de-watering or impounding head during dewatering. When there

it the wer responsible for the pump- either section or the whole dock. is a ship in the lock contains which water, iz? installation. Glenfield & The control of the valves is pre- 50,4

50,000,000 gallons of

three pumps Kennedy who supplied the cul- set and thereafter proceeds it can be emptied, by the three vert and the pumping station correct and fully interlocketworking simultaneously, in less

hours. Each pump is driven by valves and Mirrlees, Bickerton sequener,

1,200 h.p. drip-proof

both

3

UPC

Palau Islands Mines

Ponability of 1 large-scale cal and physical properties from United States mining operation in that which is now being refined the remote Palau Islands of the in the United States. South Pacific is scen Honolulu. He believe, it is entirely pos- It has been disclosed that de-alble that the ore can be *x- posits of more than 50,000,000 ploited profitably. It is helloved tons of bouxite exist in the in-several commercial companies in: Iands,

the United States are interested in the possibility.

Bauxite is the ore from which The bauxite deposits were dis- aluminum is extracted.

covered by the Japanese in 1037 The largest deposita are on the and minning operations began island of Babelthuap in the Caro-Immediately. In the next six line group, geologist Josiah Bridge] yents, the Japanese produced advised US Pacific Fleet head-about 400.000 metric tons of ex- quarters. Bridge made an econo- portable ore.

mic survey of the Palous for the During the war, the mining US. Commercial Co. at the re- facilities were bombed heavily quest of the Navy,

and strafed by US. planes and The geologist said the bauxite only a small part of the equip- niny require special treatment ment can be salvaged, the Navy because of the difference in chemi-' sald.

G

Perkins

DIESELS

Commer Truck equipped with Perkins Engine.

F. PERKINS LTD.

MAKERS OF

VEHICLE, MARINÉ & STATIONARY DIESEL ENGINES

Enquiries to

GILMAN & COMPANY LTD.

ENGINEERING DEPARTMENT

Telephone: 31146.

an AUTO-

Philip: dero Radioplayers

bring you these 19 great Radio advances:

& Day Pty. Ltd. the Diesel The possibility of damage to synchronous induction motor running Model BX 666X has generating plant.

cne unit emnot, of course, best 272 r.p.m. and supplied with pow-MATIC Bundspread system of an The G.E.C. also undertook allowed to interrupt or disor-et at 3 kV fen a 5-panel compound entirely new design. the installation, connecting up ganise the

filled metalclad switch-board having operation of the and commissiening of all the duck; for this reason, alterna- breaking capacity of 150 MVA.

The 54 incls

54 incl discharge valves are electrical machinery, in

the live push-button control is pro- of Gwynnes paten self.cpecifical course of which nearly 50 miles vided

al the starting which have bress designed of Pirelli-General cable were switchboards ref the various ty for use in graving decks. These used for the E. H. voltage and groups of valves as well as at valves are opened by hydraulic pres- medium voltage supplies besites each valve station. By means sure generated by small electrically the mullienre connections for, of selector switches at

the driven oil pumps and closed by The control, alarm and indica-starter boards it is possible to gravity. The closing is thus indepen tion circuits in the substations by-pass a particular unit with dent of the electrical supply. The in- and between the widely separout affecting the remainder in princin prevents the valves licing

when

the corresponding main aled points of operation.

the sequence. As an ultimate pump is not ruing and thus per- There

the valves are two main opern- precaution

can be forms the function of a reflux valve tions in connection with the spernted by hand should the and sluice raive. The 60 inch Deck; filing to allow the en-electricity supply fall.

tion valves are of the same type as the discharge valves but are nut in- terlocked with the starting

try or exit of a ship and, after

sealing the entrance by means

A

Mimic Diagram mimle diagram

of one of the dock gate floating caissons, de-watering to expose mounted immediately the ship's hull.

The

first and

panel behind the control desk shows at once

ment.

are

Discharge Values

c

equip.

The three circuit breakers control-

greatest de the conditions prevailing inside ling the main pump motors are pushi mand for power is occasioned the dock Ali the pumping button controlled from the main desk by the emptying operation plant, culverts and valves are in conjunction with the y-step conte which is a neccssary prelimin. shown and coloured lamps in- for type rotor starters. Duplicate bus! ary to permit keel-blocks to be diente cleard dnd open poal-bars are provided which are connect- arranged to suit the vessel to lions. In addition, it is possi-ed both to the main supply and to be docked.

ble to judge intermediate post-the stand-by supply, from the three. Provision is also made for lons of the main valves by the 1,000 kW Diesel sets. These busbars Occasional impounding to adjust relative brightness of a suries are controlled by hand operated in- the depth irrespective of the of indicating lamps which are coming witches at each end of the witchboard and ensure that alterna- tides. Besides the calsson at controlled by special trans-tive supplies are available. Back

THE BRITISH GENERAL ELECTRIC CO., LTD.the entrance there is an addi- mithers mounted on the valves: feeder is protected against overloade

Queen's Bulidingu Попк Копк

A Subaidiary of

THE GENERAL ELECTRIC CO., LTD., OF ENGLAND.

tional ons for the intermediate The whole valua of the and earth faults by induction type in- psition to allow the two partaf mimic diagram would,

definite of verte time relays with of the dock to be used separate-course, be lost if the Indications mininium time setting;, the breakers $3.

were unreliable; it was there controlling the mala motors are fitted) A system of valves, and cul- foro considered Csonttal with altullae overcurrent relayı be

to: veria, the latter elx and nino operate: the auxiliary, awitches feet in diameter, allows water! for the interlocking and indl~~

de having thermal protection.

(Continued on Page 1)

1. AUTOMATIC BANDSPREAD 2. SILENTODE CIRCUIT

Ever stativer, desa mačar) 3. THERMO COMPENSATION

{ suming drijaj * PADDING CORRECTION

Ebejer sexaštivity, sedretivity and tanej

(as your own randular} 4. CONTAIST EXPANSION

Jerpendueer studio tuna)

5. CONDUCTOR SWITCH

7. AUTOMATIC OVERLOAD

CONTROL

Coverlanding of the set impossiblej

B. ANTI-MICROPHONIC CONSTRUCTION

Emicropale have definitely

sliminated)

⚫. TROPIC-PROOF

CONSTRUCTION

19. INCLINATOR DIALS

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Tel: 59814-