1950-06-15 — Page 10

J1

THE CHINA MAIL, THURSDAY, JUNE 15, 1080.

Sure you've got space

Je install u wanderful bail |

THE NEO-ANGLE BATH-

Consult us on all

Standard

Agents:

PLUMBING FIXTURES

AVAILABLE IN "A" QUALITY ONLY

Thi beautiful

bath

artially ncosides zoomles bathing spare, yet fits into charter wall the them tenventional baths, l'ho

And frum framing while May ratsuza, to match

Biler bathroom Üxtures,

ANDERSEN, MEYER & COMPANY, LTD.

DAVID HOUSE

TEL: 28091.

Marine

GRANT

DIESELS

IO S.H.P.

to

1500 S.H.P.

McLoren 120 S.H.P. 1000 RPM Marine Engine

fitted with 21 Reverse Reduction Gear.

AVAILABLE FOR SHIPMENT IN 4 WEEKS

Agents for:

ASSOCIATED BRITISH OIL ENGINES (EXPORT) LTD.,

ARNHOLD & CO., LTD.

HOLLAND HOUSE.

Y.2010

Thla new range of battery chargers comprises one. two, and three-circuit madala with a range of vulpute The In each type shown in the table opposite, cases are et consola design for bench mountine, with eloping instrument and controf' panri, and arm Anished fa blue, with chromium-plated subular feet and lusing handles,

Metal rectification, employed, using a selenium alement. The transformers have primary tappings for 110, 0, 0, 240 and 4 3D valls and pre upijabla for 40/100 cycle. Tappinge an the secondary ura provided to adinat Else oviput, the charging varying numbers of cella and for 'centrolling tha, charging rain, the selection being made by two snap azilan Teciprocating 'rolary switches in each circuit, transformen neu double-wound, sir-cooled, and Bakelite- Impregnated to specification 7.1590.

The

A single on/off switch and double-pole fists ara provided or the primary side, and schoolpat virenit E prated by Mate-pete fuse and includes a 211⁄2" moving voll ammeter t® MR,89/1$17. áll tuan barriers, whịch are of the "głydlak"" typ4, wre -mounted on the front of the unit for easy replacement. · Further protection · ka näorded by "Kilxon" thermal, ovariong protection devices Alfed to 1ks/Pošlīdze paths, šindlen too ́lamps and satpat terminals are provided for vach, ekkenit.

TEL. 28138

*

ENGINEERING PAGE

The British Industries Fair at Castia Bromwich, Bir. mingham, Irat month attracted a great flow of oversta buyers from countries all over the world. The first ori der from a foreign buyer at any part of the Fair was made at Birmingham, where an erder was placed for more than 300 dozen can openers. it was at Birming ham that the heaviest pide of the engineering and hard- The exhibits ranged ware Industries was exhibited.

from the smallest household goods to an 80 feet high steel piling machine. This picture shows a striking ox- hibit at Castle Bromwich. # ip a hobbed double helloal malling mill pinton weighing 91⁄2 tona, made for the Steel Company of Wales by Messrs. David Brown and Sana, of Huddersfield and London,

Amsco parts for dredging work

River and harbour dredging is done for two main purposes: the creation or maintenance of navigation channels and the production of sand and gravel.

Several types of dredges are used-suction pump, clam-shell bucket, dipper and bucket ladder. The experts, no doubt, can say when a certain type is most efficient for a given set of con.. ditions, but Amsco is neutral since we make manganese steel ports for all of them,

Radio-frequency induction furnaces

For the molting of small quantities of metal tha radio-frequency operated induction furnaça presents a number of useful advantages which make it worthy of careful consideration. Induction melting results in a clean melt under con-

K+E

KEUFFEL & ESSER CO.

LEVELS

Available Stocks

TRANSITS

FORESTRY COMPASS' STEEL TAPES DRAWING SETS TRACING PAPER SLIDE RULES

Agents

trolled conditions, and the temperature of the ANDERSEN, MEYER & COMPANY, LTD.

charge can be maintained at any required figure or increased to a limit determined chiefly by the crucible.

The RF. apparatus requ5 no frequency power is conveyed to expansive foundations or aber- the tuned-clrevit cubicle from

aller the oxellator cubicle

ate buildings. In fact, the units may be portable if required. | nureened conxial enbles, Furthermore, it may be used for heat treating, or brazing opera Tunod-circuit cubicle tions as an alternative to melling.

The tuned-clrcuit eubicle en- The Metropolitan-Vickers Elec-

closes the trical Co., Ltd., have recently denser, the grid feedback coll

main tuning con completed development of amoli radio-frequency selector switches, melting furnaces of this type, which are now available in three sizes of equipment with maxi- mum R.F. outputs of 5, 10, and 25 kw. capable of melting 6, 10, and 201b, of ferrous metals res- pectively in 20-30 minutes. ·

Vacuum melting

The capacities of these equip ments when meiting nonferrous metals are less, and any such metal will be considered individu- ally Melting takes place in air but special equipment has been de- signed for other atmospheres or for vacuum molting.

David House.

Tel: 28091,

by

CARL ZEISS JENA

ZEISS IKON

ZEISS OPTON

ose choke, and the necessary au- xiliary components, busbars, etc.

The furnace is connected to the busbars which project throughs the front of the cubicle and An alternative work

posi- tion for heat-treatment..opera- tions may be provided at the back of the cubicle if required.

Selection of the furnace or the heat-treatment position is by hund-operated link type switches, and on ammeter in-

dicates the R.F. current in the'

furnace cell.

The hand-tilting furnace is designed to accommodate the particular weight of metal for which the equipment is suit-

change

All three equipments are run | WHICH

able. The furnace comprises p volts. 50-cycle from a 300-400 supply, the smallest on single-water-cooled evil mounted in a insulating phose and the two larger on three box constructed of

and arranged with phose. All equipments are inpped material

trunnions for pouring about for intermediate voltages in these

the Up axis, ranges.

The crucible within

In a hald the coll and round with heat- packed

sand. Insulating

The crucible is made of a refractory material selected to suit the nature of the charge and is easily replaced when worn.

Furnaces are cooled by water, which should be soft and clean und at a pressure of 40 p.s.i. Water consumption is 1 gall. per min. for the 5 and 10 10. equip rents and 2 gall, per min: for the 20 lb. equipment."

The apparatus is designed for indoor duty, and as air cooling is used for the valves It must be sited in position which will allow a free circulation through the oscillator cubicle.

As la so many other material and screening chain; channel drag excavating and handling opera- badtes; boat chocks: crusher Each equipment consists of tions. The service in dredging parts; cutter heads; blades and main isolating switch, a remote- chaumets, building jetties, break-tooth: dook caulings; dippers controlled

voltage re- waters, seu walls and so on is parts and lecili; dredge pipe and gulator (on the two largor equip destructive to ordinary equip- ttings: flap valves, gcars and ments only), an oscillator cubicie, parts. Consequently, the pinions, rock juck arms; ladder, a tuned-circuit cubicle, and the great toughness and

abrasion rollers; chute and hopper liners: melting furnace proper. resistance of austenitic manganese power shovel parts; dredge pumps sivel saveti MRRY O dredging and parts: rollers: screen parts; operator from a loss on his job sheaves

גני

upd locks; sletvus

Oscillator cubicle

the main

The furnace stands on a steel

table placed in front of the tuned- circuit cublele the furnace top be ing approximately 30in. from floor level.

The frequency of operation of this furnace is nominally 600,000 cycles, which has been chosen to moke Installation and running costs economical.

ZEISS WINKEL

CAMERAS

MICROSCOPES

FIELD GLASSES

TELESCOPES

ETC., ETC.

The World's Finest Lens- Perfect in Precision.

Onc udvantage ut radlo- Exclusive Agents: frequency henting 1s that it permits

the melting of very: THE HONGKONG CHINA MERCANTILE CO., LTD.

small charges, as well ዕዝ powdered substances which pre themselves capable of conduct- by keeping his equipment in sprockets: tumblers; wearing' The combined oscillator and Ing electrie currents, but in continuous operation even under plates: welding materials for re- rectifier cublele, constructed of which the surface of the pai the most strenuous operaling clamation and repairs.

sheet steel and having clec- ticles resists the passage of a conditions.

In all kinds of dredging, the trically interlocked side-open-current.

of austenitic manganese ring doors, contains toughness some of the parts steel practically precludes breuk transformer, rectiner valves, Ansco makes for this kind of uge from abocka and stresses, flament transformers, fan for work: clamshell and orange peen-the-work-hardening property circulation of the cooling-alr,| dredging buckets, arms, lips, rope of the steel insures long wearing main and auxiliary contactors, guides, sheaves, shells and. teeth life under aorasion. As a conscand the for such buckets; bushings; cóps- quence, dredge operations are and associated comparents. tans; closing, conveying, elevating less frequently interrupted for Aradle-frequency Alter In

Here are

SEC

INDUSTRIAL BATTERY CHARGERS

SINGLE CIRCUIT MODELS

Cat. No.

Clicult

Upul Mas. Amps.

Max. No.

A. Amensions D

free

H.

đ

V.2005

14′′ × 10′′ × 13"

V.2008

8

18" x 12" x 21"

Он

V.2012

24

19" x 17" x 21"

Application

V 2017

220

38

38* × 22′′ × 25'

ONIN

TWO CIRCUIT MODELS

12

On' Application

TUREE CIRCUIT MODELS-

Application

THE BRITISH GENERAL ELECTRIC CO. LTD.

ar Road

repairs, output goes up and costs

' down.

SOUTH AFRICAN BROADCASTING

-Decessary subsidiary

-NEW-RESEARCH- CENTRE

More than 100 chemists, en- the main supply prevents RF pincers and laboratory assistants being fod back into the malos,

are employed in the now research and a stabilleer maintains con-

centre at Nowenatic established by stant voltage on the filaments Thomas Hedley and Co., Britain's of the valves. Overload relays second largest producers of sopps, protect the equipment from synthetic detergents, edible fats, damage due to incorrect opera- and glycerine. tion or failure of any. com- parpet.

Four 5kw. medium-wave broad-

In this dentre basle selențile casting transmitters have been All controls for the routine and ongineering research will be ordered from Marconi's Wireless operation of the equipment, to- carried out to establish procedure Delegraph Co. by the South gether with the necessary and techniques for application in African Broadcasting Corporation; moters. are amounted on the the laboratories attached to the to supplement the six similar front panel of the cublele con- company's factories in Newcastle, transmitters, already supplied. venient for the operator. Radio- | Monchester, and London,

Laidlaw Building, 2k Des Voeux Road, Central. Cables Chimpcanco"

Telephone 20360

YALE

FORK LIFT TRUCKS SAVE GODOWN SPACE

BUILDING SUPPLIES

"TURNALL

"CRANE

"YORKSHIRE"

"CEMENTONE"

"PUDLO"

"HEATRAE"

"EXPAMET"

"A.."

"FOAMITE":

"NEWALLS" “OZONO" "EALCO": "ELECTROMATI "RELIANCE "PHILPLUG" "LEE HOWL. "HURSEAL". "RUBBERLOCK" "CRITTALLY-S "CHATWOOD"

STOCKS AVAILABLE

Asbestos Cement Products.

Bailors, Domestiç.

Copper Tubes & Fittings.

Cement Colouring Powder.

Cement Waterproofing Powder.

Electric Water Heaters.

Expanded Metal.

Fire Placos

Fire Fighting Equipment:

Insulation: Host, Cold & Sound. Ozone Generatori.

Oil Cooking Ranges.

Oil Burners, Fully Automatic.

Oil Burners, Rauge,

Plugging Materials.

Pumping Equipment.

Radistors, Oi! Londed Electric.

Rubber Flooring Tiles.

Windows & Doors, Metal. Vault Doors G Sakos.

DODWELL & CO., LTD.

MACH

ANG DEPT.

DISTRIBUTORS

YU TUNG TAI. LTD.

RING DEFT

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