DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.1401#0586
THE ILLUSTRATED EXHIBITOR
AMERICAN STONE-CUTTING MACHINE.
The novelty of this ma-
tir?? 1S the Mention
of Mr. Robert Eastman, and
is exhibited by Mr. Charles
Morey, of Boston, U.S.—con-
sists in the material of which
the cutters are composed, their
peculiar formation and dura-
bility, the small expense at
which they can be maintained,
and the facility and economy
with which they reduce the
surface of stone. The va-
lue of a machine of this
description, which is used
alike for dressing, shaping,
and ornamenting stone for
architectural purposes, will
be found in its efficiency,
economy, and superiority of
execution.
It is understood that several
adaptations of Mr. Eastman's
invention have been brought
into use -in this country since
the exhibition of the original
in the Exhibition.
"We regret that our space
will not allow us to enlarge
on the many curious objects
in the American department
—the violin piano and Mr. Hobbs's lock, for instance, both of which have obtained prizes. In photographs, India-
rubber goods, furniture for common use, and various things which contribute to the comfort of home, our cousins
" over the water" teach us many valuable lessons.
FIRTH'S HYDRAULIC PRESS.
Our engraving represents the ""Working Model of an Improved Hydraulic Press, with Indicator and Check,"
exhibited by Mr. Thomas Firth, of Huddersfield. The press here shown is similar to those used by printers in
pressing the printed sheets previous to
binding. The principle of all engines of
this description is precisely similar, though
the application of the principle differs ac-'
cording to the work to be performed. The
machine that presses the book the reader
holds in his hand and the giant engine
used in raising the tubes of the Britannia
Bridge are identical in everything but form
and capabilities. Water, and indeed all
fluids, possess the property of pressing
equally in all directions. If water be en-
closed in an iron box. and the force of one
pound is applied to but one square inch of
its surface, this pressure is at once com-
municated to every square inch of the sur-
face of the box. Bramah rendered this
force available by applying a packing
around the moving pistons, which made
them water-tight under any pressure. By
the force pump, pressure is applied to the
water in the small cylinder of the pump,
and this fluid being connected with that in
the large cylinder of the press, whatever
force is applied to the water in the first, is
increased according to difference of the
capacity between it and the last.
George Richardson and J. Turner, two *
ingenious members of the Filesmiths' Union, have fabricated for the Great Exhibition a set of miniature files, that
are a great curiosity. The whole set, two dozen, are mounted on satin and enclosed in a neat leather case, little
larger than a miniature portrait-case. So small are they, that the whole twenty-four weigh less than a fourpeiny-
piece. They form part of the magnificent display of files exhibited by the Sheffield Filesmiths' Committee. Shefii Id
likewise furnishes a tea-kettle manufactured out of a fourpenny-piece. Of the general, contributions of'Sheffield to
the Great Exhibition we have already spoken in terms of high praise at pages 201-209.
AMERICAN STONE-CUTTING MACHINE.
The novelty of this ma-
tir?? 1S the Mention
of Mr. Robert Eastman, and
is exhibited by Mr. Charles
Morey, of Boston, U.S.—con-
sists in the material of which
the cutters are composed, their
peculiar formation and dura-
bility, the small expense at
which they can be maintained,
and the facility and economy
with which they reduce the
surface of stone. The va-
lue of a machine of this
description, which is used
alike for dressing, shaping,
and ornamenting stone for
architectural purposes, will
be found in its efficiency,
economy, and superiority of
execution.
It is understood that several
adaptations of Mr. Eastman's
invention have been brought
into use -in this country since
the exhibition of the original
in the Exhibition.
"We regret that our space
will not allow us to enlarge
on the many curious objects
in the American department
—the violin piano and Mr. Hobbs's lock, for instance, both of which have obtained prizes. In photographs, India-
rubber goods, furniture for common use, and various things which contribute to the comfort of home, our cousins
" over the water" teach us many valuable lessons.
FIRTH'S HYDRAULIC PRESS.
Our engraving represents the ""Working Model of an Improved Hydraulic Press, with Indicator and Check,"
exhibited by Mr. Thomas Firth, of Huddersfield. The press here shown is similar to those used by printers in
pressing the printed sheets previous to
binding. The principle of all engines of
this description is precisely similar, though
the application of the principle differs ac-'
cording to the work to be performed. The
machine that presses the book the reader
holds in his hand and the giant engine
used in raising the tubes of the Britannia
Bridge are identical in everything but form
and capabilities. Water, and indeed all
fluids, possess the property of pressing
equally in all directions. If water be en-
closed in an iron box. and the force of one
pound is applied to but one square inch of
its surface, this pressure is at once com-
municated to every square inch of the sur-
face of the box. Bramah rendered this
force available by applying a packing
around the moving pistons, which made
them water-tight under any pressure. By
the force pump, pressure is applied to the
water in the small cylinder of the pump,
and this fluid being connected with that in
the large cylinder of the press, whatever
force is applied to the water in the first, is
increased according to difference of the
capacity between it and the last.
George Richardson and J. Turner, two *
ingenious members of the Filesmiths' Union, have fabricated for the Great Exhibition a set of miniature files, that
are a great curiosity. The whole set, two dozen, are mounted on satin and enclosed in a neat leather case, little
larger than a miniature portrait-case. So small are they, that the whole twenty-four weigh less than a fourpeiny-
piece. They form part of the magnificent display of files exhibited by the Sheffield Filesmiths' Committee. Shefii Id
likewise furnishes a tea-kettle manufactured out of a fourpenny-piece. Of the general, contributions of'Sheffield to
the Great Exhibition we have already spoken in terms of high praise at pages 201-209.