· THE CHINA MAIL, THURSDAY, APRIL 8, 1948.
KEWANEE
ELECTRIC PISTON PUMPS
for Domestic Water Supply
BUILT BY
ONE OF THE
ORIGINATORS
OF THE
PNEUMÁTIC
SYSTEM
OF
WATER SUPPLY
KEWANEE PRIVATE UTILITIES CO.
KEWANEE, ILL., V.A.S.
Stocks carried by:-
YU TUNG TAI LTD.
ENGINEERING DEPARTMENT Agents for South China,
218, Queen', Buliding.
Tel. 33145
ELECTRICAL INSTALLATIONS
by
THE JARDINE ENGINEERING
CORPORATION LTD.
14-16 PEDDER STREET, HONG KONG,
Telephone 30311.
CARTER & SUTTON
INDUSTRIAL AND COMFORT
Air Conditioning
Engineers.
236A HONG KONG &
●SHANGHAI BANK BLDG.
-Telephone-28904.------
ENGINEERING PAGE
Science Of Air Electronics
of
Without any doubt, the selence
Instrument.
Navigation: The Radio Compass
New
Tho
of electronles will eventually Mention of the now G.E.C. optically enlarged frequency by pre-setting the travel of a render obsolete a good many pre-Radio Compass has been made scale is projected with considor com in such a way as to retard sent-day methods of doing all carlier but, since this device is able brilliance on to the kidney or advance the servo follower manner of things, and the realms the first of its kind to be wholly shaped ground-glass screens of by the required number of de-
measurement and inspection designed and manufactured in each of the control boxes. Mo grebs in relation to the loop. offer wide scope for applications Britain. It merits a fuller des-tor-driven tuning is employed, On "A.D.F." the loop is of electronies. It is not surpris-cription, particularly since it is and it is necessary only to turn driven through o differential ing, therefore, that considerable to become standard equipment the tuning knob slightly to left gear by two small motors run- Interest, has been aroused by an for the Royal Air Force.
or right to decrease or increase ning in opposition. In the no- electronle comparator, derman-
The name "Radio Compass" frequency. The servo drive is signal or null condition the mo strated recently in London. This is a new British invention which implies the function of the of proportional type whereby tors run at equal speed so that Receiver, aerints the speed of tuning is depend the loop remains stationary. gives promise of being an almost equipment. universally applicable Inspection and circuits combine to produce ent upon the amount by which When a station is tuned-in and. an a 360-degree dial an indles- 'he knob has been turned. therefore, a signal in present, A single indicating instrument tlon of the bearing of the ata-
Nothing has been sacrificed one motor is speeded up and the 14 employed, ond this can be tion or beacon being received. for compactness in the control other slowed down. As a re- coupled to numerous types of Thus it is possible to home, to ranel, and facility in the opera-ault there is a drive in one di- hend to suit not only the shape obtain fixes, or to obtain bear-tion of this type of tuning con-rection and the loop in rotated. and size of the component to ings at regular intervals fortrol is claimed to be very rapid- As it approaches the null, the)
D. R. be inspected but also the physical normal
navigation. ly nequired. When the requir motors approach the condition characteristics of the component Physically, the equipment com-ed brondeant atation or beacon of equal and opposite speed, For checking dimensional
DC prises a receiver, a loop aerial, has been tuned-in (and in this and at the appropriate point the curacy gauging heads can ba sense aerial, and twin control connection it should be stress- loop remains at rest. devised quite readily, and thee equipment is sensitive, to dimen- units (one each for navigator ed that a special ground sta- bearings obtained in this way sional variation, of 1 micro-inch, and pilot), together with ation is not required, any suit- are accurate to one degree, or
Inspection of
in large, clear "compass" dial for able beacon broadcasting ata- better than componenta
one degree smaller tion can respect of their linear dimensions the navigator, and a
be used) a bearing strong signals. Incidentally, by no means exhausts the pos repeater for the pilat.
may be obtained by awitching] while on "A.D.F." the loop mo- sibilties of this electronic com-
Loop Aerial the main control to "LOOP"tors run continously so that no parator, for it opens the way to easy inspection of those factors So many refinements are in- and operating another similar errors due to starting condi-
control for driving the tions are introduced. that formally call for testing to corporated in these casential loop until the null position has destruction. The electronic com- units that only the more strik-been found aurally. parator can see inte solid seeing items can be detalled. Be for sense is made in the usual
It will have been noted that tions and can be used to detect ginning, appropriately. with internal flaws. Castings, welded the loop aerial, this now belien way by shifting off the mini-there are no mechanical remote controls. A cathode-follower mum signal position and de- structures and laminated ducts
pro-Its name, for it has been re-ressing a sense button. When valve-unit, which is employed to the
things duced to a flat lozenge-shaped switched to "A.D.F." the signal that con be examined non- destructively for internal flaws. coil only a few inches in depth. itself drives the loop into the
inspection with iron-dust corea. For re minimum signal position. of every component, if desired, trospective Etting to aircraft instend
of the
sure this loop is enclosed in a hous-Mechanical Operation less method of testing to destruction ing shaped rather like a flat- Whether on "LOOP" or on samples taken from a batch. fish; the aerodynamic drag of "A.D.F.," all movements of the this housing is of the order of loop are transmitted to the one-third that of the previously navigator's and pilot's indica- assembly, 22 lb; two uned standard 10in loop. For tora by servo followers. In ad- boxca, 8 lb 2 oz; junction box, incorporation in new aircraft adition, the quadrantal error & lb 8 oz; cathode follower, i "dish-pan" type of housing is correction is made mechanically lb 9 oz. used, and the loop aerial is ne- commodated Inside the aircraft
Dre
Thin allows
Among
positive
Australia
For Ammonia
Production of sulphate of am monia in Australla to the extent of 50,000 tons year, is an impor- tant new project planned by the Electrolytic Zinc Company of Melbourne.
skin so that there is no external projection.
which
In the design of the receiver, covers the frequency- range of beacons and broadcast-
Acrvo
A check
Flexibility
on
AIR
CONDITION
NOW
Be prepared for the Hot Weather by installing the new Self-contained
“DRAGONAIRE
★ GREATER
192"
CAPACITY.
For samo H.P., up to 15% more than other Makes. SMALLER SIZE. Lass floor and wall space required.
LOWER OPERATING COST. More B.T.U, Cooling for same H.P.
match the loop to the
I H.P. UNITS IN STOCK NOW connector cable. removea nny possible, electrical limita- tions. Thus complete flexibility 20,000 B.Th.U. per hour with of installation is achieved.
The approximate weights of 80°F. dry bulb temperature and Receiver, 30 lb 12 oz; loop 5000 relative humidity in the
CONDITIONED SPACE !!
the components are:-
control
A Useful Bending Machine
At Risdon, Tasmania, the coming stations, case of servicing pany will install a modern plant, has been the guiding line. Unit estimated to cost £A2,500,000 construction has been carried for the work.
to the stage in which the whole for tubes, rods or bars is now of holes spaced along its length.
At present Australia is export- equipment can be
incor-
uf
A useful little bending machine; reaction block plate with a series dissembled being supplied by the Tungum When the required reaction block ing only small quantities (3484 into ten units, including con- Sales Company, Ltd., of Chelten- has been selected it is inserted cwt, for 1945-40) and most of trols, amplifiers, wavechango ham, Glos. It is made in two in the appropriate hole to hold period Australia is for the same and condenser drive, generator sizes to take tubes up to in the work in position in relation to the former. permit consis- period Australia imported 647,120 and filter unit, etc. Twenty and 1in outside diameter; the cwt., valued at £402,477.
smaller machine is suitable for tency in work length a simple one valves are employed, all of bench mounting and the larger yet effective gauge stop of the Electrolytic approved type and easily reis usually supplied complete with gouging bar in front of the for- Directors
on the machine. A porated on Zine Company belleve that Aus placeable, with filamente supa stand. tralian demand will grow stead-
mer, extends the full length lly, and that even if local market plied directly from the aircraft
The machine is of all-steel con- the frame and is drilled at in- requirements are met there will DC, supply voltage. The mainstruction. It is-simple-to-operate tervals-to-accommodate-on-ad-
control switch on the control
upwardly It te predicted, that there willpanel gives the normal facili- and set, and is particularly suited Justable stop with an
for long run repetition work. projecting arm against which the (Continued at foot of next Golumn)ties of a receiver with either The base plate of the machine work is registered prior to being
automatic or manual volume is rigidly attached one and of bent. control together with automatic) closed frame formed by extend- extend- direction finding ("A.D.F.") | ing the
A central- side members. Á and a position marked
disposed ly
pin in the plate pivot pin "LOOP."
is designed to accommodate 0. range of interchangeable formers, Servo Drive
which can be selected according to the radius required on the work. A series of Interchangeable
be a good export market.
BENLOW GOLMET
1948
1.
WHY IS THE BENLOW GOLMET LIGHTER SO POPULAR?
Because:
It is MECHANICALLY PERFECT and never fails.
It is machined from solid aluminium and is therefore, seamless and,
absolutely fuel tight.
It doesn't-need-filling for weeks at a time,
Using a Benlow Golmet means saving fuel, fiints and wicks.
It opens and lights smoothly and stays lighted without holding.
It is perfectly ANODIZED in GOLD and other beautiful bright colours.
It combines perfection with beauty and gracefulness.
It is a most dependable lighter, the lighter you have been waiting for. FREE SERVICING GUARANTEED. SPARE PARTS FREE OF CHARGE.
BEWARE OF CHEAP IMITATIONS!
as
Use of the receiver in the or- dinary way requires no specific
Electric Typewriter
comment, but reference should rollers is supplied for the bend For One-Hand be made to the ingenious ar- screw incorporated in the
arm, and
and an adjustment
arm
The first one-handed electric
rangements for tuning. When permits accurate setting of the typewriter manufactured for
the receiver is switched on, an rollers in
genous
law
WAR
the U.S. Veterans Administra- relation to slipper
to a blocks, which inserted be- tion has been given
arc (Continued from Col. 3)
University tween the rollers and the work Georgetown be a world shortage of
on the former. A circular plate student whose left side nitro- on
Axed below the former has a paralyzed from a battle wound. fortilisers and available Frics of holes round its circum- to the works at Risdon is hydro-ference. In these holes stops can electric power at reasonable cost, be inserted to set the angularity and a deep-water frontage. The of the work being bent in in- product handled at f.o.b. at low
crements of 1 deg. cost, can be shipped to any deep- Extending water port in the world.
The student-veteran is Albin'
Ulrickson, B4, of Fort Worth, Tex. After trying out the now machine, he said he thought base that with a little practice he would be able to type almost as well as a person with two İr hands.
across the plate in front of the former is a
VICTOR
ADDING
MACHINES
Low
Undoubtedly the finest value in "Adding Machines. initial cost and remarkable dependability. We can supe ply large machines or portable machines; the latter full or tan-key keyboards, st your option.
THE
Now Blocks arriving soon.
OFFICE APPLIANCE
LIMITRAŽ Specialists in Office Equipment.
York Bldg., Chater Rd.,
Tel: 31023
The one-handed machine has the letter keys in the right half of the four banks, and the figures and punctuation marks the loft. These positions are reversed on machines for: voterans who are using their Jeft hand to type.
on
The most frequently used letters are placed convenviently
for the Index finger.
Below
Bole Agents:
REISS, BRADLEY & CO., LTD. National City Bank of New York Bldg., Showrooms: Fenwick Road. Telephone 28006.
G
Perkins
DIESELS
Commer Truck equipped with Parkine Engine.
F. PERKINS LTD.
MAKERS OF
VEHICLE, MARINE & STATIONARY:
DIESEL ENGINES
SOLE
AGENTS
the keyboard, the specially-de- GILMAN & COMPANY LTD.
signed, machine has two bars-
one for spacing and the other
for shifting lines. The car-
riage return is controlled by a key on the right side of the board.
DE-ICING
Com-
The Fairey Aviation pany has taken, out a very in- teresting patent. It concerns a de-icing equipment invented by Captain A. G. Forsyth at Hayes, This de-icing is achieved by. heating the propeller blades and the heat is supplied by an electric generator housed in the alrscrow hub. "The apparatus is completely solf-contained and isolated, so that it is fully pro- tected; for example, from any permeation of oil or almllar substance..
ENGINEERING DEPARTMENT.
Telephone: 31140,
Enlighten Your Night With
inionile-
UNION METAL WORKS LTD.
** 17 Kayamally Building Tel.: 20895, 20898;)