The rollers are coated with plumbago or other
material to prevent adhesion to the molten metal. In the case of
metals of high melting point the machine is fed direct from a furnace
divided into two compartments by a wall or bridge in which is a
stopper which can be operated so as to regulate the flow of metal.
When applied to forming sheets of glass, the rollers should be warmed
by a blow pipe flame as above described, and the sheet of glass
stretched and annealed as it leaves the last roller.
* * * * *
WELDLESS STEEL CHAINS.
At the Royal Naval Exhibition, London, Messrs. William Reid & Co. are
exhibiting their weldless steel chains, which we now illustrate.
Of the many advantages claimed for steel chains, it may be prominently
noted that a very important saving of weight is effected on account of
their possessing such a high breaking strain, compared with the
ordinary welded iron chains. To illustrate this, it may be stated that
a given length of the weldless steel chain is 35 to 40 per cent. less
in weight than an equivalent length of iron chain, will stand the same
breaking strain as the latter, and indeed, where steel of special
quality is used in making the weldless chains, this difference can be
increased as much as 70 to 80 per cent.
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