IMPROVEMENTS IN TUYERES FOR SMITHS' FORGES OR SMITHS' HEARTHS
Year: 1875

page_text: PROVISIONAL SPECIFICATION left by John Reynolds at the Office
of the Commissioners of Patents, with his Petition, on the 24th
September 1875.
I, JOHN REYNOLDS, of Birmingham, in the County of Warwick,
Blacksmith, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN TUYERES FOR SMITHS' FORGES OR SMITHS' HEARTHS," to bc
as follows:-
My Invention has reference to such tuyeres for smiths' forges or
smiths' hearths as do not require to be kept cool by water, and my said
Invention consists in constructing and combining the parts of the
said tuyeres in the manner herein-after described.
The objects of my Invention are to control and shut off the blast to
the tuyeres, to effectually break up the clinkers on the hearth around
the delivery pipe of the tuyere, and to prevent the ashes or breezes from
the hearth falling into and choking the delivery pipe after the blast has
been shut off.
In constructing a tuyere for smiths' forges or smiths' hearths

page_text: box or chamber, through which the blast passes, the said box or chamber
being surmounted by a block or mass of metal. This block is situated
in the centre of the hearth and is heated by the said hearth. In the
middle of the said block is a conical opening, the narrow upper end of
which constitutes the blast delivery pipe of the tuyere. Made in one
piece with the rectangular blast box or chamber is a lateral chamber
which projects from the end of the hearth. The blast box or chamber
is divided by a vertical division into two compartments of different sizes,
communication between the two parts of the blast box being effected by
a passage in the said division, which passage is opened and closed by a
rectangular valve or sliding plate. Into the smaller of the two com-
partments the blast pipe conveying the blast to the tuyere opens, and
the other and larger compartment is in free communication with the
blast delivery pipe described in the block surmounting the blast box or
chamber.
The valve or sliding plate by which the passage between the two
compartments of the blast box is opened and closed, slides vertically in
guides on the inner side of the vertical division of the blast box, motion
to the valve or sliding plate being given by a long lever moving in a
vertical plane, and working in the said blast box, and also in the lateral
chamber in connection with the said blast box. The inner end of this
vertical lever carries the valve or plate, and the outer end of the said
lever is connected to a cross axis at the end of the lateral chamber.
The end of this cross axis projects from the lateral chamber, and is
provided with a handle for working the lever. Passing through the
lateral chamber of the blast box is a vertical rod against which the
lever described bears, the said rod serving both to guide the lever in its
vertical motion, and also to preserve the sliding valve or plate in close
contact with the partition against which it works. The sliding valve or
plate works with such friction against the partition of the blast box,
that the said valve remains in any position into which it is moved.
Jointed to the inner end of the lever near the valve or sliding plate is a
vertical plug which is situated in but is capable of projecting from the
blast delivery pipe of the tuycre. By means of the said plug the
clinkers which accumulate around the blast delivery pipe may be
readily broken up, and the ashes or breezes when the blast is shut
off prevented from falling into and choking the delivery pipe.
When the lever mechanism is depressed the valve or sliding plate

page_text: opens the passage in the blast box, and the blast enters the said box
and passes out at the delivery pipe, the said delivery pipe being at the
same time opened by the lowering of the vertical plug. When the
lever is raised the valve or sliding plate is also raised and the blast cut
off, the plug being lifted so as to close the mouth of the delivery pipe
and prevent cinders passing from the hearth into the blast box.
.
When it is wished to clear from clinker that part of the hearth
surrounding the delivery pipe the lever is raised sufficiently high to
cause the sliding plug to project out of the delivery pipe, and push
before it and break up the clinker about the said delivery pipe. The
blast box or chamber is heated from the hearth of the forge, and the
blast in passing through the said box is heated thereby, and economy of
fuel results. By the position of the handle by which the lever described
is worked, the position of the valve and plug is determined.
Tuycres constructed according to my Invention require little cleaning.