IMPROVE- MENTS IN AND APPERTAINING TO FURNACES FOR CARRYING ON CEMENTATION PROCESSES, SUCH AS CASE HARDENING, OR DE-CARBURETTING IRON
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by William Phillips Thompson at the
Office of the Commissioners of Patents on the 31st May 1881. A communi-
cation from abroad from Messieurs Frédéric Pagès and Jérôme Pagès, of Paris,
in the Republic of France.
WILLIAM PHILLIPS THOMPSON, of the Firm of W. P. Thompson and Co., Agents
for Foreign Patent Solicitors, of 6, Lord Street, Liverpool, in the County of Lancaster,
and 323, High Holborn, in the County of Middlesex, Civil Engineer. " IMPROVE-
MENTS IN AND APPERTAINING TO FURNACES FOR CARRYING ON CEMENTATION
PROCESSES, SUCH AS CASE HARDENING, OR DE-CARBURETTING IRON." A communi-
cation from abroad from Messieurs Frédéric Pagès and Jérôme Pagès, of Paris, in
the Republic of France.
The following is a literal translation of the Specification as forwarded to me by
the French correspondent of my firm with directions to file.
"Our Invention has for its object a system of improved furnace for the cemen-
tation of iron. It is characterized by the combination of a chamber of refractory
material of parallelopipedon or other form enclosed in masonry in such manner
that there shall exist between the masonry and the chamber an interval or space
sufficient to permit the introduction of combustible.
In order to make the matter better understood, we have represented in the
Drawings annexed hereto, by way of specimen or example only, different views of
a furnace disposed according to our Invention.
Fig. 2
Fig. 1 shows a vertical section longitudinally through the furnace.
represents a transverse section through the axis of the same. Fig. 3 is a plan of
the same furnace.
In these Figs. the same letters of reference relate to the same parts.
a is a chamber made of refractory materials, put together in any convenient and
suitable manner, and carried or supported by beams or supports built into the
masonry c of the furnace.
This masonry is of such dimensions that it leaves round the chamber a a vacancy d
capable of containing combustibles. Under the chamber a is arranged a grate e for
the firing, worked by means of two or more openings f; the openings
admit the necessary air for combustion.
serve to

page_text: The fire lit, it is kept up, and the combustion watched through the openings h
which allow of one seeing into the space between the chamber and the walls of the
furnace.
The chamber a is closed by a cover i, and the outer walls c of the furnace are
also covered in by a second cover k.
The chimney pipe m is placed in the centre of the cover k, and in order to allow
the withdrawal of this cover, the said pipe m presents a union or movable sleeven,
which can be easily raised by the cord carrying a counterweight p and passing
over a pulley v. The brackets or side supports 8 are arranged on each side of
the cementation chamber at those parts where they are most necessary for its
stability.
The articles to undergo the process of cementation are placed with suitable
inaterial for the purpose in the chamber a.
The arrangement of details of our Invention can be varied according to require-
ments of the case without changing the nature of the Invention."