Improvement in Forms of Forge-hearths.
Year: 1896

page_text: Date of Application, 5th Nov., 1896
Improvement in Forms of Forge-hearths.
I, CARL FRIEDRICH SCHUBERT workmaster of Chemnitz in the kingdom of
Saxony and empire of Germany do hereby declare the nature of this invention to.
be as follows:-
Fig. 1 and 2 show a forge-hearth of round transverse section in upper view and
vertical section while in the figures 3, 4 and 5 a forge-heath of oblong shape is
represented in upper view longitudinal and transverse section; to this fig. 5 gives
a detail.
The essentially new feature in the improvement is the arrangement of the
actual forge or of the inserted piece A in such a manner inside an exterior air
vessel B that both parts at the upper rim are connected airtight, while otherwise
there is every where between both a kind of collecting or storing-room G for the
pressing air supplied through the pipe a and the arrangement of the wind holes b
in the inserted piece A inclined radially towards the centre (Fig 1 & 2) or alter-
nately in rows opposite each other (Fig 3, 4 & 5) the holes being a little wider as
the bottom (about 35 mm ) and narrower at the top (about 9-10 mm
which means the formation of any thin-flames at the holes is avoided.
) by
The blasts of wind issue under great pressure from the narrow holes and are
either strown back from all the holes towards the centre or against each other out
of the holes which are opposite each other in pairs whereupon, after having been so
to say reduced to fine spray they spread uniformly through the whole part A.
Here the entire fuel in A is uniformly hit and pervaded by the air, so that a
very strong and uniform heat round about and consequently a quick and pure
welding heat is obtained.
Through the narrow upper mouths of the holes 6 there only fall the finest burnt
cinders, the so-called coal-dust, which is recollected below in B and is removed
by simply pushing away the disk c, which can be turned sidewards and lies at
the lower end of the air-vessel B, while on the other hand it is impossible for
unused fuel to fall through the openings b.
The space at the upper rim between A & B is best rendered tight by asbestus
which is pushed in between.
The air-vessel B has cast-on support surfaces d in order to hold it on and between
two U-irons e built into the hearth (or also angl-irons etc.) while at the top as
shown in Fig. 2. it is built in or laid with the rim f in a hearth-plate.
The tube a may also, as shown in Fig 5 be arranged deeper in the vessel B,
which is correspondingly lengthened towards the bottom and then a metal-plate g
in the shape of a roof be attashed as a air-guide or wind-breaker.
The falling dust slides down on both sides over the inclined surfaces of g on to

page_text: the slide c, while the wind strikes the large surface of 9, cleaning from
it any dust, that may be on it and being at the same time directed upwards.
A practical arrangement may be added to the forge-hearth by the smith being
able to change its position in a simple manner without leaving his place, so that
he has before him as will a long and narrow or a oroad and short fire.
These arrangements are shown in Fig. 3-6. Here the air-vessel 13 at the upper
rim f has a circulay shape and is laid so as to be able to rotate in a special ring D,
which must either be built in or fastened on the hearth-plate.
The justing out surfaces of the rim f are stiffened by cast on ribs m. In order
that the air-vessel B may be easily turned its lower part B which is connected with
the air-conducting pipe a is severed and between them, the moveable ring E.
(Fig. 6) which is attached to the upper part B by means of screws a and has
toothed indentations i, is arranged.
A suitable tool F engaging the indentations i with the tooth k serves to turn the
ring E.
In order to prevent the fire vessel A from getting red-hot I construct them with
water boxes for cooling. This is done by making in the inside of the cast-iron
casing or of the body of A a circular passage to which by means of two adjoined
pieces a supply and waste tube for the water are attached, coming from resp."
entering into a water-reservoir.
When the fire is being used this causes a continual circulation of the water from
the reservoir through the supply-pipe into the passage of the body A, then round
about A and then back to the reservoir through the waste pipe and the desired
cbject is thus attained.
If in the oblong forge-hearth the dotted and hatched welding pieces G are
put in, they cover the end-holes and a part of the lateral and bottom-holes b, so
that in this way a small fire with a correspondingly less number of blast pipes is
obtained.
These welding-pieces G are practically provided with handles in order that they
may be lifted out.
Dated this 24th 1 of 1900
For CARL FRIEDRICH SCHUBERT.
Bernhard Brockhues.
Improvement in Forms of Forge-hearths.
I; CARL FRIEDRICH SCHUBERT, workmaster of Chemnitz, Nordstreet 11 in the
kingdom of Saxony and empire of Germany do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
-
Fig. 1 of the drawings, filed with the provisional specification, shows a forge-heath
of round transverse section in plan fig. 2 in vertical section, while in the figures
3, 4 and 5 a forge-hearth. of oblong shape is represented in upper view, longitudinal
and transverse section; fig. 5 gives a detail to the latter.
The essentially new feature in the improvement is the arrangement of the actual
forge or of the inserted piece A in such a manner inside an exterior air vessel B
that both parts at the upper rim are connected airtight, while otherwise there is
every where between both a kind of collecting or storing-room C for the wind
supplied through the pipe a and the arrangement of the wind holes b in the inserted
'piece A inclined radially towards the centre (figs. 1 and 2) or alternately in rows
opposite each other (figs. 3, 4 and 5) the holes being a little wider at the bottom

page_text: (about 35 m/m diameter) and narrower at the top (about 9-10 m/m diameter)
whereby the formation of blow-flames at the holes is avoided..
The blasts of wind issue under great pressure from the narrow holes and are
cither thrown from all the holes to the centre, or from the holes which are arranged
opposite against each other whereby the blasts of wind are equally distributed in.
the whole part A. Consequently the entire fuel in A is in all parts equally touched
and prevaded by the air, so that a very strong and uniform heat round about and
consequently a quick and nure welding heat is obtained...
Through the narrow upper mouths of the holes b there only fall the finest burnt
cinders, which accumulate below in B and are removed by simply pushing away
the disk c, which can be turned sidewards and lies at the lower end of the air-
vessel 13, while on the other hand it is impossible for unused fuel to fall through
the openings h.
The space at the upper rim between A and B is best rendered tight by asbestos
being pushed in between.
The air-vessel B is provided with fixed surfaces d for the purpose to hold it
up and between two U-irons e immured into the hearth (or also angle-irons etc.)
while at the top as shown in fig. 2 it is immured in or laid with the rim f in a
hearth-plate.
The tube a may also, as shown in fig. 5 be arranged deeper in the vessel B, which
is correspondingly lengthened towards the bottom and then a metal-plate y in the
shape of a roof be attached as an air-guide or wind breaker.
The falling dust slides down on both sides over the inclined surfaces of g to the
slide e, while the wind strikes the large surface of g, cleaning from it any dust,
that may be on it and being at the same time directed upwards.
For long-shaped forms of forge hearths may be made a practical arrangement
in such a manner, that the smith is able to change its position in a simple manner
without leaving his place, so that he has before him a long and narrow or a broad
and short fire.
These arrangements are shown in figs. 3-6.
'Here, the air-vessel B at the upper rim f has a circular shape and is laid so as
to be able to rotate in a special ring D, which must either be built in or fastened
on the hearth-plate.
The jutting out surfaces of the rim f are stiffened by cast on ribs m. In order
that the air-vessel B may be easily turned its lower part B which is connected
with the air-conducting pipe a is severed and between them the moveable ring E
(fig. 6) which is attached to the upper part B by means of screws and has toothed
indentations i, is arranged.
A suitable tool F engaging the indentations with the tooth serves to turn the
ring E.
In order to prevent the fire vessel A from getting red-hot. I construct them with
water boxes for cooling. This is done by making in the inside of the cast-iroa
casing or of the holy of A a circular passage to which by means of two adjoined
pieces a supply tube and a flowing off tube for the water are attached in such
a manner that the cold water is conducted by the supply tube from an upper reser.
voir into the circular passage in the body of A and the heated water returns by
the flowing off tube upwards in the reservoir, thus circulating between this, and A.
When the fire is being used this causes a continual circulation of the water from
the reservoir through the supply-pipe in the passage of the body A, then round
about A and then back to the reservoir through the waste pipe and the desired
object is thus attained.
If in the oblong forge-hearth the dotted and hatched welding pieces G are put
in, they cover the end-holes and a part of the lateral and bottom-holes b, so that
in this way a small fire with a correspondingly less number of blast pipes is
obtained.
These welding pieces G are practically provided with handles in order that
they may be lifted out.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. A forge-hearth signified by the arrangement of the fire-vessel A- in an air-
vessel B so that both parts are tightened above against to each other, but also
leave all around an air-space C between them, and by, the arrangement of air-
holes 6 narrowed from below to above and inclined against one another in the
fire-vessel A so that the wind from C gets equally into all openings b and coming
from these with strong pressure is equally distributed in the whole vessel A and the
fuel in it and thus produces a quick, equal and pure welding heat.
2. A variety of the forge-hearth signified under 1, whereby in the body of the
fire-vessel A a canal is arranged to a circuit with a conducting and discharging
tube and with a reservoir, for the purpose to avoid the red-hot of A.
3. A variety of the forge-hearth signified under 1 for long fires, signified so,
that of the air-vessel B the firmly standing under part B is separated and the upper
part B is provided above with a circular edge and can be turned in a particular
ring D, that it is thus possible to give to the fire a longitudinal or diagonal direc-
tion to the smith.
4. In order to render the easy turning also possible with hot forge-hearths in
the performance signified under 3 the arrangement of the dented ring E at the
under edge of B, to be turned ou B, and tool F.
5. With oblong forge-hearths signified in claim 1 the arrangement of welding
pieces G, by which one can render the fire in the oblong or longitudinal direction.
smaller and correspondingly diminish the number of the blast-pipes b.
Dated this 21th day of July 1907
For CARL FRIEDRICH SCHUBERT
Bernhard Brockhues.