Page B
THE CHINA MAIL, THURSDAY, JUNE 24, 1948.
L
THE LINCOLN
SHIELD ARC WELDER'S
WELDING EQUIPMENT
FLEETWELD ELECTRODES
„STOCKS CARRIED-
BY
J. P. INGLIS & SONS LTD.
CORNER CHATHAM and MATAUWEI ID. KOWLOON.
TEL. NO. 58054. Representative For South China and Hong Kong THE LINCOLN ELECTRIC CO.
AUSTRALIA, PTY. LTD.
¿NEW Dictograph INTERCOM
MADE FOR
PRICED FOR
SMALL BUSINESS
NOW! A genuine Dictograph system, for small busi ness... a now electronic system-designed and priced by DICTOGRAPH to meet the specific needs of small firma, stores, institutions, professional men!
Gives you voice-to-volce contact with smering clarity on the new "VOICE-MIRROR" System, Provides split-second access to any one in your organization, . Keeps people at their desks, helps everyone get more done in less time. Sover time, energy, money for you! —Ask for a demonstration today to see how science and Dictograph can help your business at a modest coati
Dictograph Electronic INTERCOM
The "VOICE-MIRROR" System Everyone Can Afford3,
SOLE AGENTS:-
E. OTT & CO., LTD.
French Bank Bldg. Tel. 32589.
ENGINEERING PAGE
"HIDDEN-ARC" WELDING OF OIL-FIRED HOT WATER HEATERS
The minimum demand made the range of the pressed-in bottleally locates, the
component } alterated dirylug process, the
on an all-fired hot water, heater [loin," The tank is turned by the parts and an automatic shield tanks enfèr, the galvanizing, pot tank is that I must function un-rollers on which it rests and Is are welds the flue completely, passing through, the flux chamber' failingly under the most severe, held down by at pneumatically. The tank is how ready for test-first and then into the molten plessures.
actuated arm. The ends are helping to détermine structural zinc proper. All design and construction de In rollers by puetinatte pressure, weaknesses or leaks. This is ac- The next step to topping the tail must develop from that pre-This, weld is made in about 22 complished by subjecting the spuds to receive the numerous mised any Change In the seconds.
tank to a 300-pound minimum threaded Attings. This task is manufacturing process must pass tubing flue is inserted through
At this point, a inch seamless | by ctrostatic pressure,
accomplished on a specially de- the strktest kind of testing be-
Foreign matters, such as scole. signed tapping machine feeding fore it can be accepted.
the necked upenings in the top rust, or grease detrimental to the openings to a revolving top The Hoosier Industries have re- and pottom stampings and the standard galvanizing procedure with the tank in a horizontal po
complete, tank semoly ported noluble success with
ared is removed by a hot bath (180 sition. the on the five welding
All stations are indexed Incorporation
the
equipment degrees) in sulphurle neid. automatir for
This to insure proper uxini alignment fluc top and metallic are welding process into
bottom bath is followed by a rinse it to pertinent assemblies, welds. the construction of such heaters.
This machine pneuma-¦ colt - muriatic acid. After an ex- Actual production time and costs have been impressively cut and yel, by adhering to the following procedure in detail, the Onished Theaters are easily meeting performance requirements.
لاد
A 12-gauge hot rolled steel is out and aquared to dimensions of 47 unches by 44 inches in a shear. Using only one die cut press, nine [rsenings, including the rectungu. pag burner door opening at the bottom of the tank, the hole for water pipe connections and screw holes for attachmen, are stamp- fest out and plerced.
One edge of the sheet is pre- rolled in order to give it greater Purvature than the rest of the rolling. The advantage of this operation is that it provides unt- form
curvature throughout the
ral rolling.
Using the
automatir metallic
are process, the longitudinal Joint is butt welded.
Not only is cum-
plete penetration obtained, but n 47-inch weld is produced in 27 seconds.
Next, theuds and brackets for the bulb channel are welded in manually with an A.W.S. eler- trode, E8010 in the 1/8-inch dia meter. This ts an electrode especially designed for very deep penetration. Following this, small "V-shaped brackets are lo- ented and spaced by a fiature And then welded to the side of the tank. The spuds are welded with one pass around the spud shoulder and properly ligged_so "That" when "apped, the tipping axis will be a true 00-degree to the center line of the tank wrap- 1 per sheet,
In one operation by a hydrau lie press, the head nud
bottom are pressed into the tank. Ал atlier automate is brought into play to wekt the bead to the shef in one puss requiring 27 seronis. The tank shell rests on rollers and is turnéd by a ring whleh presses against the head
The longitudinal joint la butt welded using a "Lincolnweld" automatic. Complete penetration is obtained in the 47-inch weld which is made in 27 seconds.
Something
New In Wireless
Work has begun on the con- struction of a frequency-modula- tion British Frontlensting Cor- poration transmitter station, near Wrotham, in the English county of Kent. It will be the first sta- tion of this type to be erected in Europe. The station will operate
about three metres,
compared
of the tank under pneumatle on a very short wave length of
pressure
usco
The betions_thon-welded-in-win the 330-metre wave length the tank using an automatic used for the Home Service in which creates a weld that pene- Britain. The new technique whil trates through the tank wall into
bring about a revolution in broadcasting comparable with the change-over from crystals to valves.
and the establishment of the
Пету transmitter marks the beginning of a new phase In broadcasting which will bring to the listener music and speech re- production of a quality hitherto
The British Navy has been using fire-resistant wood since 1816.
Many states and elties in the U.S.A. have enacted laws and ordinances requiring the flame-proofing of places of public assemblage. *
But formerly the method of fire-proofing timber has been expensive and Inflexible and confined to chemicals suitable only for interior use.
Now
we take pride in introducing to you our simplo and sure way
of
Protecting Your Family and Property Against Fire Hazards
with
FLAMEOUT
In
15
Colours
PAINT
FIRE, WATER, MILDEW,
and WEATHER
RESISTANT-FINISH FOR
WOOD
-and- FABRICS
-for Võriod Applications
USED SAME AS ANY OTHER PAINT: LASTS LONGER: COSTS NO MORE
ReadLife, August 4, 1047 issue
Read
A New Paint Checks Fire
Los Angeles Commercial News, March 2, 1948. ·
Many Nations Buy Los Angeles Flameproof Materiale:
"During the War, flameproofing was a 'must' with the U.S. Army and Navy One Company (Westhoe Paint & Fireproofing Co., Inc.) processed 7,500,000 yards. of flameproofed canvas a year for the Army and Navy. This company has been manufacturing flameproof compounds for more than 20 years.”
A publie demonstration with Flameout painis was mado on May 10, 1948 in Los Angelos, U.S.A. and the Fire Battalion Chief, H. S. Norvillo called the experiment ■ SUCCESS. (Los Angeles Daily News).
Tel: 27441
Manufactured by
-Westhoo-Paint & Fireproofing Co., Inc.
Los Angeles, U.S.A...
.
Solo Agents for China:
J. GIBSON & CO.
Hong Kong
unobtained.
The next step is to drive nip- ples into the various tappings and then comes the final test un- der 35 pounds pressure which in- in volves submerging the tank water.
The outer jacket of the heater Is fabricated from 22-gauge cold- rolled pickled steel which is roil- ed to shape after plercing anti spot welded into a cylinder. The door
and opening in formed hinges apot welded
place, after
which the Jacket is de- greased and spray-painted white and passed through an Infra-red lamp oven.
in
Finally, the burners and t- tings bre installed and fiberglass used to insulate the top be- tween the tank and the Jacket top. As a guarantee bgainst any Imperfections, 35-pound air 'pres- sure is corried during line assern- bly and checked before heater ciating. Any leaks are thus made obvious by pressure drop.
It is planned to extend the use of the automatie metaille welding process to cover as many of the welding operations as pos- sible.
RTC
One fillet, made in 12 seconds, walds the top of the flue.
Margarine From Herring
A new process superior to any process by which seven scientists other in the world for the conver-will make Scottish trout bigger, sion of herring to oil, meal and better and more plentiful. The
As the range of ultra-short other products including mar- committee of experts is headed
is limited to about 50 garing; has been
to
developed in
waves miles it will be necessary
Britain. A pilot plant operated Professor C. M. Yonge, of Chemicals, build a substantial
rumber of at Lowestoft, Suffolk last season. Glasgow University. transmitters in order to cover the It is now at Lerwick, in the muinly phosphates and nitrates,
Shetlands, Scotland, where
it is will be added to the water in whole country. The Wrotham
planned to have the Arst hig the experimental reservoir of a transmitter station will be the first of a number of such stations It is thought that it should ulti- much the same way as land is factory working by the summer. Scottish hydro-electric works, in throughout Britain to improve mately be possible to use 175,000 monured.
The chemicals will coverage of the Third Programme
and later the Light Programme. tens of herring for this purpose, feed the plants, and the plants, Both these frequency moduln-yielding about 17,000 tons of all, in turn, will feed the fish.Tho
Another new tion services will be additional to
development in seven scientists will work in o long and medium wave
length
Britain's fishing industry is a laboratory at Pitlochry, Scotland transmissions. The reception of the new transmission will require additional technical facilities to the existing sels which, however, should increase the
present price by Only
few
poids.
At first, radio manufacturers. will continue to sell ordinary types of sets, but with an addi- tional switch enabling listeners to have FM (Frequency Modula-
tion) as an
"extra. Existing Fets can be adapted to receive
FM signals at comparatively
small cost...
Traffic Blocks
-The-Introduction. of ultra-sbert. wave transmission is all the more timely as. In spite of all the pro- gross achieved in the technique of transmission. and reception, the Increase in the number of wireless stations has brought about a disquieting traffe block fn the ether, especially in the medium and long-wave broad- casting bands. Furthermore, the progress-in-industrialization--and- cicctrification is not exactly con- ducive to improved radio recep- tion, and
the rapid extension of mater-car tenfe is an addi- tional cause of disturbance with a specially deleterious effect' on short-wave reception.
The re ception or progrümmes_transmit÷ ted on frequency modulation will remain undisturbed. by all tho above-mentioned noises and the use of a "Limiter" and a "Dis- crimininator" will even exclude noises occasioned by household appliances
such до vacuum cleaners, electric washing.
and sewing machines and so on..
The new frequency-modulation transmitter station near Wrotham f being built by Marconi's Wire-
Queen's Road, C. less Telegraph Company, Limit-
ed, London.
Chubb & Sons Lock & Safe Co., Ltd.
Available er stock as illustrated.
Sole Agenti
THE JARDINE ENGINEERING CORPORATION LTD.
14.10 PEDDER STREET, HONG KONG.
TELEPHONE 30311)
G
Perkins
DIESELS
F. PERKINS LTD.
Type S6M Marine Diesel Engines
·100 HP-2,000 RPM · Complete with revorso gear and 2 to 1 reduction gear
Available for early delivery.
Sole Agents;
GILMAN & COMPANY, LTD.
ENGINEERING DEPARTMENT Telephone: 31140,
The SINCERE COLtd.
HONGKONG'S' GRE
THENT! STORE
-SOLE AGENTS
FOR
Farnsworth
RADIOS
KNOWN FOR TONE
BRC
FABRIC
ELECTRICALLY_CROSS-WELDED
STEEL WIRE MESH
IN ROLLS OR SHEETS
FOR CONCRETE REINFORCEMENT
Stock Availabla
CO., LTD.
DAVIE, BOAG
Chartered Bank Bldg.
Agents for
Tol20117
BAITISH REINFORCED CONCRETE" ENG" COSÉTO,"
1