1948-12-02 — Page 8

THE CHINA MAIL, THURSDAY, DECEMBER 2, 1040..

GILMANS

ARCHIMEDES A/B.

Outboard Motors.

SUPPLIERS OF

BELLING & LEE LTD.

Aerial systems and Radio Components,

CO-OPERATIVE WHOLESALE SOCIETY

Offer Equipment & Furniture, Floor Cleaners and Polishers.

ENGINEERING & LIGHTING EQUIPMENT CO.

Industrial and Street Lighting.

FERRANTİ LTD.

Meters & Instruments, Heating Appliances (Waterheaters), Transformers, moving coil regulators.

JAMES GIBBONS LTD.

Steel Windows and all types of door furniture,

GOODE DURRANT & MURRAY

"Kange" Electrk Hammers.

3. & E. HALL LTD.

Lilts &

Escalators.

HYMATIC ENGINEERING CO.

Portable Compressors & Spray Paint equipment.

GEO. W. KING LTD.

Shiding Door Clear, cranes and huists.

KOHLER OF KOHLER

Bathroom, Simitary ware,

KRESKY MFG. CO.

Heating Appltaners.

waterbenters.

NATIONAL FIRE PROTECTION Co.

Fre Appliansers.

J. G. NAYLOR & CO. LTD.

Abrasives,

P. & B ENGINEERING Co.

Lond Testing Instruments,

F. PERKINS LTD.

Vrhude & Marie Diesel Engines.

QUASI-ARC LTD.

Welding Equipment & Electrodes.

SIKA LTD.

Integral waterproofing materials for rement.

TYZACK & CO.

Piles and hacksaw błacing.

P WIKSTROM JOR

Swedish "Nordex" wallboard

WITTE ENGINE WORKS

Diesel Electric Generators & Small Stationary & Marine Engines.

GILMAN & COMPANY LTD.

ENGINEERING DEPARTMENT

da, Des Voeux Rd., C..

AGENTS

Telephone 31146.

INDUSTRIAL-COMMERCIAL

JOHNSON BIGBURNERS

BURNS HEAVY BUNKER OILS

ANDERSEN, MEYER & COMPANY, LTD.

DAVID HOUSE

HARRIMAN REALTY CO., LTD.

REAL ESTATE BROKERS AND VALUERS

·"COME TO UB-FOR ADVICE":

AVAILABLE

ALL TYPES INDUSTRIAL & DOMESTIC PROPERTIES A

201 Victory House Wyndham Street, Tel. 33602. Telegrama "Harriman"

TEL: 28091.

ENGINEERING PAGE

THOMA PNEUMATIC VACUUM CLEANING

IMPROVES SPINNING

IT has been repeatedly pointed out in every in- vestigation into the working condition of the cotton industry that the greater proportion of the operatives' time is wasted in piecing-up broken ends at ring frames, collecting the flying ends, removing the roller laps which these broken ends leave on the under-clearers, removing the "fly" or waste as a result of endsdown, and generally cleaning up.

In an effort to obviate this loss of time, it has been the standard practice on ring spinning 'frames to have revolving top clearers and revolving under-clearers above and below the drafting rollers, the object being, of course, to attract and "catch up" the loose flying roving before it has chance to become a menace to the ad- jacent ends still unbroken. .

is perforated in such a way that there is a hole ioented immediate- ly beneath the point of delivery of each roving (Fig. 2)

ໂຕ. the Thoma system of pneumatic

cleaning. vacuum under-clearers are done away with and in their place is filled

patient scavenger sucti pipe rumming the length of the frame and beneath the bottom metallic rollers.

This pipe is clearly illustrated in Fig. 1 and 2. and attention is drown to the fact that the pipe

FIGURE 2

THOMA'S CLEANER

PNEUMATIC VACUUM CLEANER FOR RING FRAMES

Box

Thoma's Cleaner: Central Duct and Filter

accisulating clean and loose fibres ready for rework.

Thoma's Cleaner: Suc- tion Pipe with Suction opening for each spindle located under yarn deli- Iu of steel roll. very case of an end down the twisted part is sucked through suction opening

a iliustrated and deli- wered to the filler bor.

Advantages

1. Considerable saving of raw material as the fibers accumulated In the warto .container are ready for rework,

2. Improved quality through great reduction of

ends-down and elimination of doubles.

!

8. Essential incrasse of efficiency and still greater

increase of spindle sailgament per operator.

4. Elimination of sorvengar roll and roller lapa,

hence great saving of steel and top rella.

5. Spinning-wasto opener unnecessary as waste

is collected ready for re-LED.

6. Improvement of air condition through the sucking away of much ty and purifying of air in Miter box.

SOLE AGENTS:-

SIBER HEGNER & CO., LTD.

TIENTOIN

PEIPING

HONG KONG

ST. GEORGE'S BLDG.

PHONE 22325

SHANGHAI

When end breakage necurs the suction hole in the pipo Im- muriately captures and the float- ing roving and sucks it way to o central air pussage located immer diately on the centre-line of the frame under the ercel. All the scavenger suction pipes are led into one central extract ale duel, from where the roving passes in- fo alter box Bited at the end of the ring frame (Fig. 3), or as an alternative, from each ring frame Into a central station separator of patented design.

In individual frame units," one fun with its compunton motor and drive is incorporated, or alterna- tively, in some instances, it may be preferred with the drive up from the cylinder or tin roller existing on the frame.

The great advantages claim- ed for the Thoma system by the makers are labour-saving, greater efficiency and Improv ad working conditions, thus re. suiting in the ability of, sach spinner operative to mind a greatly increased number of ring spindles.

In addition, there is the great saving in raw material itself, be- cause the fires which necumulate in the killer box are all loose, un- twisted cofion being reduced back felo the Sbre stage.

Unquestionably, there is a dis- tinct improvement in the general condition of the room through "fly" being constantly removed from the ring frames,- whilst the cuttingcut of the seavenger cleur- ers and roller laps leads to mach higher efficiency and the saving of leather rollers,

of in-

FIGURE 1.

To Obtain]Coal For Heat

Miners Freeze The Earth

By Michael Grant

Mining engineers are freezing a column of the earth's crust to a depth of 412 fest near the village of Calverton, Notting- hamshire, England, in preparation for a new pit, which will open up a virgin coalfield with an estimated output of a mil. Bon tone a year for the next century.

OUS

The new colliery shaft will pass through a stratum of por. sandstone. which forms à great underground reservoir

town providing Nottingham and surrounding

with their

water.

Freezing will seat off the water, which would other. wise flood into the shaft during excavation at a rate of some 1,000 gallons a minute.

First it was necessary to sink 25 pipos, In a circle, around the proposed shaft and through the sandstone. Brine, cooled circulated to 37 degrees below freezing point, is now being through the plpos, in two months' tima a tong oylinder of Ice will have boon formed, within which the shaft alekors will

and get to work. There are three compressors, condenadra, water-cooling tower in the refrigeration plant.

*

Headstocks 130 feet high and a 1,750 horse-power electric winding plant both to be used in the excavation, will have boon installed by the time the les barrier has been completed. The finished shaft will be lined with Iran tubing and com- crete.

Mullard "Double Super"

In Radio

Reception Plus

Several times in the history of radio It has seemed that reception had reached such a high standard that little or no improvement was possible, and then, suddenly, patient and per- sistent research has been rewarded; another advance has been made and we have once again had to revise our standard of radio values.

two

valves

This general condition creased cleanliness in the ring Such an advance is marked transmissions. Also incorporated twin out-put room with Thoma Cleaner instal-by the introduction of the new in this set uro tations, automatically makes for Mullard "Double Super". This valves, which are

set is the result of many years working in "push-pull." of research, followed bv 11 period of most exacting tests and measurements, until anally Mullard. scientists were satis- fied that within the limits of today's technical knowledge, it was impossible to make any further improvements.

FIGURE 3

The Mullard 9-value, 12 wave- band Bandspread "Double Super" has, obviously a very big future. There is no doubt at all that the special double superheterodyne circuit, together with its double performance features, will soon make it famous throughout the world for all round perform- ance, quality at reception, volume and tone.

Across The Dial

other

For the first time in history of wireless receiving sets, each of the important short-wave bands is spread across the whole width better spinning, through fewer of the dial. This makes tuning

on the station

na choosing medium

This device results in greater undistorted out-put then is possible with a singin output valve, and thus plays an raising the Important part in

quality of reproduction, Another feature is the double- sensitivity "magic eye" which works with two pairs of “wings. While the first pair gives on tune" Indication of, comparative- ly weak stations, the second pair comes into operation on signals

MULLARD "DOUBLE SUPER"

ends down, elimination of double to any shortwave station us easy which ore strong enough to ends (two rovings to one yam), anct as accurate

swamp out the first pair. This and it will also be readily, seen

wave enables the set to be tuned hot that the Thona system obvintes band. This bandspread produces only with absolute precision but the necessity to employ spinning a stability on shortwaves hitherto with the volume control at waste unobtainable. In addition, com- minimum setting, thus enabling waste openers, since the collected is ready for re-use at plete coverage of shurtwave bands tuning to be carried out in com-

is provided once, being in ijs ibrous state.

This combination of features, purative silence. Full information and technical together with the long and me- details may be obtained from dium wavebands coverage, en- Siber. Hegner and Co. Ltd. aures accurate reception of all

PAINTING THE NAVY

Do

necessary

Less Interference

Efficient delayed automatic con- trol counteracts fading a high | frequency' stage helps to prevent second channel interference and assists

weak The reception of. signals which might otherwise be innudable; and the highly sensi- live 10 lach permanent magnet quality under all conditions of

For preserving and colouring repainting will ships of Britain's Royal Navy, with the new palot and evantal loud-speaker ensures perfect tone scientists have developed a grozy a big saving of linseed oil will paint, which it is hoped will result. prove.. more, durable, than the

reception for all types of pro- grammes.

paints previously used and will In the first experimental trials

Indeed, from every point of conform to the traditional colour, with the. syaiholle resin paints, to la a paint bound by synthetic the pigments used produced view the Mullard "Double Super" sexin, one of the materials do- rather greenish arkar. (This led a fine set for those listeners veloped in the plastle industry, to reparts that worships were who rely Inrgely on shortwave The paint contains little linseed getting a new look. Further reception for their news and en- nil, which in imearcos ant has experiments have resulted in a tertainment, but also wish to en- been, developed to overcome the synthetic result paint which close-Joy the programmes which me tendency toshaik", in: ses, con- by resembles the colour of the dlum and long wavebands, have ditions, a bad feature of the gold all bound paint and approval to offer. It represents dinary freed oll bound paint, has been given for trying out the aiderable stride forward in radio It is beileved that lens-frequent new paint on a large scale. development.

a. co

RN

Silent DIESEL ENGINES

Anti-knock cumbustion hood.

0

Totally enclosed.

Silent and Vibrationless.

Electric or Air Starting.

*

✡

MARINE & INDUSTRIAL UNITS

Enquiries to:

7—100 H.P.

SWIRE & MACLAINE LTD.

ENGINEERING DEPARTMENT CONNAUGHT RD., C. TEL. 30331.

APB20.

ARNHOLD & CO., LTD.

HOLLAND HOUSE

HONG кона

.

SASSOON HOUSE

SOLE AGENT FOR-

SHANGHAI

BRITISH OIL ENGINES (EXPORT) LTD.

· OIL ENGINES ΤΥΡΕ Α.Υ.

COMPRESSION

IGNITION

Better

H1Z12)

COLD STARTING

4.CYCLE

3.10 B.H.P.

Single & Twin

Cylinder

with

Full Speed &

Half Speed Shaft.

5 BHP. Engines Running at 1500 R.P.M.

CAN NOW BE DELIVERED FROM

STOCK IN THE COLONY

HENLEY CABLES

FAMOUS FOR OVER

SOLE AGENTS:

CENTURY

THE JARDINE ENGINEERING

CORPORATION.

14-16 PEDDER STREET, HONG KONG, TELEPHONE 80311.