IMPROVEMENTS IN THE PRESSING' OF HORN AND HOOFS TO BE USED IN THE MANUFACTURE OF COMBS AND OTHER ARTICLES." PROVISIONAL SPECIFICATION
Year: 1881

page_text: LETTERS PATENT to David Stewart, Master of Arts, of the Firm of
S. R. Stewart and Company, of the Aberdeen Comb Works, in the Oity and
County of Aberdeen, North Britain, for an Invention of "IMPROVEMENTS IN
THE PRESSING' OF HORN AND HOOFS TO BE USED IN THE MANUFACTURE OF
COMBS AND OTHER ARTICLES."
PROVISIONAL SPECIFICATION left by the said David Stewart at the Office
of the Cominissioners of Patents on the 10th May 1881.
DAVID STEWART, Master of Arts, of the Firm of S. R. Stewart and Company, of
the Aberdeen Comb Works, in the City and County of Aberdeen, North Britain.
"IMPROVEMENTS IN THE 'PRESSING' OF HORN AND HOOFS TO BE USED IN THE
MANUFACTURE OF COMBS AND OTHER ARTICLES."
The said Invention relates to improvements in "pressing" horns and hoofs into
comb plates, buttons, knife handles, spoons, cups, paper cutters, and folders, and
similar articles made from the said materials, and has for its object the production
of all such articles in a manner or by a process much more expeditious than that
hitherto employed.
The improvement constituting this Invention consists in applying a combination
of steam and cold water pipes for heating and cooling alternately plates of a very
fine smooth metal, plates which being hollow are first heated by steam admitted
through the aforesaid pipes, and they are then pressed by ordinary hydraulic
presses to a point which varies in accordance with the kind of work required, after
which the supply of steam is cut off by a cock or its equivalent, and cold water is
then caused to run in by opening a cock or its equivalent. The plates are then
allowed to cool for the requisite space of time in accordance with the work required,
and when taken out will appear in the condition known in the trade as pressed
work.

page_text: "
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said David Stewart in the Great Seal Patent Office on the 10th November
1881.
DAVID STEWART, Master of Arts, of the Firm of S. R. Stewart and Company, of
the Aberdeen Comb Works, in the City and County of Aberdeen, North Britain.
IMPROVEMENTS IN THE PRESSING OF HORN AND HOOFS TO BE USED IN THE
MANUFACTURE OF COMBS AND OTHER ARTICLES."
My said Invention relates to improvements in "pressing" horns and hoofs into
comb plates, buttons, knife handles, spoons, cups, paper cutters and folders, and
similar articles made from the said materials, and has for its object the production
of all such articles in a manner or by a process much more expeditious than that
hitherto employed.
My said Invention consists in heating and cooling alternately the said materials
during the process of "pressing" by means of steam and cold water applied
alternately to hollow plates of a very fine smooth metal, between which the said
materials are placed, a series of these hollow plates with the materials between
them being placed in the press. Steam is first admitted into the said hollow plates
through pipes, and they are then pressed by hydraulic or other suitable power to
the point rendered necessary by the kind of work required, after which the supply
of steam is cut off, and cold water is then caused to run into the said hollow
plates. The plates and the materials between them are then allowed to cool for
the requisite space of time, in accordance with the work required, and when the
materials are removed they will be in the condition known in the trade as "pressed
work." The steam and water may be admitted to the hollow plates by means of
any suitable arrangement of pipes provided with cocks or their equivalents for
opening and shutting off and regulating the supply of steam and of water, the said
pipes being flexible or jointed or otherwise arranged to accommodate the motion of
the plates in the press.
Having now described and particularly ascertained the nature of my said
Invention, and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what I consider to be novel and original,
and therefore claim as the Invention secured to me by the hereinbefore in part
recited Letters Patent is, -
The improvements in the "pressing" of horn and hoofs to be used in the
manufacture of combs and other articles, the said improvements consisting in
subjecting the said materials during the " pressing" operation to the alternate
heating and cooling effect of steam and cold water, applied essentially as herein-
before described.
In witness whereof, I, the said David Stewart, have to this my Specification
set my hand and seal, this Seventh day of November, One thousand eight