THE CHINA MAIL,- THURSDAY, AUGUST-31,-1030,- A
CONSULT US ON ALL
Standard
PLUMBING FIXTURES
Call and me W about thego. smartly styled units and all the. other quality products in the complete line of Standard Plum. bing Fixtures,
IT PAYS TO INSTALL
Standard Quality
Thi
Plumbing
Fixtures
retour,
Mielenty of
this backdro
und
proves that today's bath- 100m raz be a stinctiva and ameful da any‘zoom in the homt, The Mater One-Piece Water Clones JAKIERY. sirt, and thereagh in methan The handsome Companion LavR- готу han wide. Indrea.
bow? fer
́emeent
PEDALE
uture.
King
Iterana
Both are made ol
vitress
model
Chin
Bath, enir 4 feet squeTO,
is reamy and comfortable.
Avaliable
in Wha
many papulas estoura,
ANDERSEN, MEYER & COMPANY, LTD.
·DAVID HOUSE
TEL: 28091.
YOU CAN CUT YOUR V-BELT INVENTORY
with
VEELINK
Just 4 reals replace up to
316 sizes of endloss
V-BELTS
Stocks Of All Sizes Available
材
Sole Agents-KIU FOONG TRADING CO.
20, Connaught Road, C.
4
ENGINEERING PAGE
Control panels for walking dragline
There clean, comfortable controla
with operate the world's largest walking dragline, now building in Bri tain, One hand lever operaten. the 900 hp. unit con- trolling the holat motions; in normal operations the other, hand lever operates the drag movements. When moving, the walking unit cán be clutched-in to one of the hand lovers. The foot pedale control the 450 hp. swing motion. The dragline is being 'bullt for the iron ore fields in England's Midlands.
Bogie motor trucks for Malaya
Under the programme of rehabilitation, drawn up by the Colonial Office, transport facilities in Malaya, which were completely shattered by war and occupation, are in course of rostora- tian.
As part of this programme, Cravens Railway Car- riage and Wagon Co., Ltd., of Sheffield, have supplied a number of bogie motor trucks with a carrying capacity of 30 tons for the transport of motor vehicles or for use as covered goods wagons. Foch truck is mounted on cast- Two rails with a series of holes steel bogies standard for the in their outstanding flanges run -varlous-types-of-wagon,-und-in-the-full-length of both sides-of comman with the other wagons, the wagon, a removable portion
Marform process :
economy in metal forming
The Glenn L. Martin Company has accopted the proposal by Hydropress Inc. of New York to manufacture and sell Martin Marform metal forming units, ....
The Marform process, makes possible the forming of metal parts from aluminium alloys, sheet steel and other metals into the most intricate shapes without recourse to expensive dies.
The new process was develop-have been attained. In testing ed by the Marlin engineers be. operations. cause metal forming by more Similarly, a cup depth equal to conventional procedures was cun- the radius is normally expected sidered too costly.
from
a steel die, while a depth equal to 1.5 times, the radius ↳ normally expected in Marform: depths equal to 2.4 times the radius have been achleved In
It was estimated that the new method would save the aircrat Industry alone some hundreds of thousands of dollars annually.
This is achieved by the sub- stantial increase in the rate of production of detalled parts and the considerable decrease In la bour and tooling costs, t
The operator can make com- plex slicet metal parts involving drawing, shrinking and stretching at the rate of 50 19 120 per hour. Higher press speeds and multiple tooling will increase this rate {proportionately.
the
The principal feature of process is the preelslon control of the pressure curve for the farming cycle of the part being manufactured. This control of the pressure enables the part to be formed free of wrinkles while at the same time, reducing springback to a minimum.
The Marform process has been designed to combing, the forming ability of the steel dle, with the ecznomical tooling of the Guerin process.
For example, the Marform process utilises the same simple male punch employed in the Guerin process but it also re- quires a flat plate on which the metal rests.
work
certain cases,
Он
the
occasions, therefore, Marform process can form a part.
that one operation
would otherwise require two,
Pressure can be built up in the machine by the movement of the press before any forming of the metal takes place; in this way the tendency to wrinkle is prevented. Also eliminated process is the lack of selectivity of available pressures in the steel dla: the pressures can be varied infinitely and automatically in the stroke of the machine.
in the new
Pressures employed in forming. a given part on the Marform unit may start at a low figure, increase, simply increase then fall off; the pressures may gradually until they may start at a high figure the part is formed; alternatively
and diminish.
Working pressuré..
The presses employed by Glenn Martin for Marform work are of
GENERAL ELECTRIC
U.S.A...
For all Industrial Requirements
G.E. MOTORS
& CONTROLS
Agents:
ANDERSEN, MEYER & COMPANY, LTD.
DAVID HOUSE
*
Junghans
CLOCKS
IN METAL OR WOODEN CASES
TEL: 20091.
Wall Clocks ⚫ Boudoir Alarm Clocks • Dial Clocks Alarm Clocks • Motor Car Clocks • Mantel Clocks Kitchen Clocks • Travelling Clocks • Office Clocks Miniature Alarm Clocks . Ship Lever Clocks
SMART CLOCKS FOR THE MODERN HOME ASSORTED COLOURS • CHROMIUM PLATED GILT AND IVORY ETC.
STOCKS CARRIED,
INDENT ORDERS 'TAKEN
800 tons, and 3,500. tons capacity. THE HONGKONG CHINA MERCANTILE CO., LTD.
The former is used in conjunc tion with a Marform unit with a forming area of 10 by 18 in... providing a forming pressure of 5,500 p.s.l.; the larger press is used with a forming area of 28 by 31 in., making a forming pres- zure of 7,000 p.s.1.
It is therefore unnecessary to
These pressures can be trans- make either a female die, pres-lated directly into working pros- sure plate or draw ring. This sure on the metal part in the unit means that it is unnecessary to itself. The controls provide for make half of the tool formerly extensive variations of this prese required for a drawn port and sure from almost zero to the So many cases more than half the maximum figures,
cost of the tool is saved, since
Examination of the crystalline: the female portion of the tool
structure of Marform part as often the most difficult to make; compared to a part formed in moreover, the matching
another manner shows that the between the two halves of the structure has not been- disturbed toal- very tedious and costly to the extent normally encoun- procedure has been eliminated.tered
Sheet metal parts-can-be-mode to a tolerance of plus or nus .002. of an inch. A tolerance of design with deep plate girder cen- | doors, tre longitudinals and fitted with Tubular wheel bars, which are though the Marform process does where the shape is suficiently claim that al-plus or minus .005 of an inch is commonly obtained on parts central automatic couplers and stowed along the centre of the
sides when not in use, fit on theso not give the embossing definition rigid to maintain such accuracy. ralis and across the trucks, and of the steel die, at least in its The Marform process. also has by placing pegs in the appropriate present state, it out-perforras the an advantage on very thin mate- holes a motor vehicle can
steel die in certain important rials which are often difficult to positioned and prevented from aspress the percentage reduc
form. allding along the truck during
Material as thin as .010 of an transit.
the undertrame is of all welded being provided at the allding Designers' claim
| vacuum brake equipment.
The bodywork consists of gal- vanised steel sheet and steel framing riveted together and lined with timber, being shipped in sub-assemblies and erected on site.
be
The designera
tion
In area which can be made" inch thick has been- successfully Special features are the end There trucks are nearly 43ft. on a blenk in one forming opera-formed and a .012 gauge cup was door arrangement and the motor over buffers 39ft. long over tion with a steel dio is 10 per deep-drawn to the point where securing equipment. The end headstocks and inside the body, cent, a reduction in area of 57 the depth of the cup was 3 of doors consist of top swing por- with an inside body width of Tft. per cent is considered normal in the diameter of the cup. tions and a full-width hinged 5. The height Inside at the Murform work on the some ma- Gauges -as thick as 875 in ballom door with wheel tracks, ta centre is 7ft. · 101⁄2 in. Centres terial (aluminium
alloys)
and aluminium alloys and .102 in form 4 loading ramp when of bogics are 27ft. apart. The figures as high ав 70 рет cent:1010 steel have been formed. lowered. This is Atted with tore weight of each truck is 17 spring-loaded controllers for case tons 9cwt.
Tel. 25403
in raising and lowering.
MERCATOR
VERTICAL FIRE TUBE BOILERS.
GUASK
FEED
The Right Type of Boiler
for
VULCANIZERS, DYEING & CLEANING PLANTS,
CREAMERIES, BAKERIES, LAUNDRIES, BOTTLING AND CANNING PLANTS,
HIGH AND
"LOW MATER
CUT-OUTS
HARD HOLE
TO SAFETY
FUSE PLUS
DETALL OF SAFETY FUSE PLUS,
HOLES FOR
GASTAMIN
[SHAKING
BAND HOLES FOR CLEANING
These vertical Fire tube bollers are compact,
powerful, and require a minimum space.
100
125 150 LBS.
WORKING PRESSURE”
- 12. 125. 11.P.
MERCATOR CORPORATION
TRADING
USA. PAG STOCK CARRIED BY
genta: YU TUNG TAI LTD. Ensineeting Dept.,
·York Building, H.K.
„Telephone 31145.
Successful test of locomotive
A six-day series of tests has been successfully completed by the Londoni, Midland Region of British Railways with loco- motive No. 44704, using the new No. 3 dynamometer car and the mobile testing..units.
The route used, was from Derby to Willesden and back, and the schedule was so arranged that the engine worked at: constant speeds of 10, 20, 30, 40, 50, and 00 m.p.h. for periods of half to one hour.
ધ
For each test different cut- ofa were employed, and the object was to produce charac- teristic curves of indicated and drawbar performance, as well of the upper limits of copacity at each spcode"
The indicating was effected by means of the: Farnborough indi- cator in the dynamometer car. Coal consumption was assessed using the special tender and weighed bags af-coal, great care being taken to equalise the thick- ness of fire on the grate at the beginning, and end of the tests. Water was measured by incans of u woter meter.
The six-day series, of represents the Arst serious use of the mobile plant for locomotive testing, and the opportunity "Winn trkan to gain úrparlanes and per». |fect the technique. Preliminary. assessment of be rénalta la võr promising, and f-1. sirpady, clear That this máliïòd of testing tacom motives will prove: mincesituly
WHEELS
all Vomestic & Industrial Users
FROM #MALL TOY WHEELS-THROUGH ALL THE VARIED REQUIREMENTS OF THE GASTOR AND FURNITURE TRADEWTO INDUSTRIAL TRUCKS AND WHEELSARNOW, A
INDUSTRIAL DIECAST CENTRES AN
14. CASTOR WHEELBY
• HOLID RUBBER TRUCK WHEELS
* SOLID HARD RUBBEN CASTON WHEELS
► ALUMINIUN.CENTERED FRAM WHEELS
*BARROW WHEELS, ENDA
Stocks Available from:
WILLIAM JACKS & COMPANY LIMITED-
107 PRINCES BUILDING
HEAD OFF!
LUNDON
Tel. 27109
Laidlaw Building, 20, Des Voeux Road, Cantral. Cable. "Chimecanco".
Telephone. 20369
CROSSLEY BROTHERS
LIMITED.
ENGINES
MARINE, STATIONARY
1.
AND
AUXILIARY MARINE
DIESELS.
EX STOCK HONG KONG 133 B.H.P.: 500 R.P:M. COMPLETE
WITH ENGINEROOM - FITTINGS - -
Sole Agents:
ENGINEERING EQUIPMENT CO., LTD.
Hongkong Bank 'Buiħling,'
J
Phone: 27789
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