IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR THE MANUFACTURE OF TAR
Year: 1878

page_text: LETTERS PATENT to Frank Wirth, of the Firm of Wirth and Company, Patent
Solicitors, at Frankfort-on-the-Main, in the Empire of Germany, for the
Invention of "IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR THE
MANUFACTURE OF TAR." A communication from Eugen Wernecke, of Trebnitz,
near Tenchern. in the Empire of Germany.
Sealed the 10th December 1878, and dated the 15th June 1878.
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office of
the Commissioners of Patents on the 15th June 1878.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at Frank-
fort-on-the-Main, in the Empire of Germany.
"IMPROVEMENTS IN THE METHOD
OF AND APPARATUS FOR THE MAnufacture of TAR." [A communication from
Eugen Wernecke, of Trebnitz, near Tenchern, in the Empire of Germany.]
Notwithstanding the many improvements which have been made in the manu-
facture of tar some 30 to 40 per cent. of the amount shewn by analysis to be
contained in the raw material is lost in the manufacture as heretofore practised by
reason of the high temperature to which the tar gases are exposed before they
arrive at the still. My said Invention removes this difficulty, that is to say, the
burning of the tar vapour, and produces more tar and of a better quality with less
fuel than has been practicable heretofore.
An apparatus constructed according to this Invention rests on I irons, which are
supported by brick work in such a manner that the fire bridges are carried by
supports and rails over the funnels. The said rails support covering slabs, upon
which fire canals of suitable form are placed. On each side of and parallel with
the said fire canals are situated a series of bent tray-like sheets of metal provided
with a hollow centre, through which cooling water is passed, they all being
connected by removable elbow pieces.
The whole is faced and held together by angle irons.

page_text: The floor of a cooling space is provided with too cooling chambers on each side,
while on the other hand the escape pipe for carrying off the collected tar is in the
centre. In the said cooling space is also situated a slime brush provided with arms
with steel brushes attached; this brush is worked by rods passing through packed
joints. According to the size of the apparatus the brush will have to be made in 5
two or more parts, and the arms of corresponding strength.
The apparatus is provided with the necessary valves and cocks.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frank Wirth in the Great Seal Patent Office on the 14th
December 1878.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at Frank-
fort-on-the-Maine, in the Empire of Germany. "IMPROVEMENTS IN THE METHOD
OF AND APPARATUS FOR THE MANUFACTURE OF TAR." A communication from
Eugen Wernecke, of Trebnitz, near Tenchern, in the Empire of Germany.
This Invention relates to improvements in the manufacture of tar as herein-after
set forth.
Notwithstanding the many improvements which have been made in the manu-
facture of tar some 30 to 40 per cent. of the amount shewn by analysis to be
contained in the raw material is lost in the manufacture as heretofore practised by
reason of the high temperature to which the tar gases are exposed before they
arrive at the still. My said Invention obviates this difficulty, that is to say, the
burning of the tar vapor, and produces a larger quantity and a better quality of
tar with less fuel than has been practicable heretofore.
An apparatus constructed for the purpose of this Invention is illustrated in the
accompanying Drawing, in which,-
Figure 1 is a front elevation partly in section of my improved apparatus.
Figure 2 is a section through the line x, x.
And Figure 3 is an under side view of the said apparatus.
The said apparatus rests on I irons, which are supported by brickwork in such a
manner that the fire bridge A is carried by supports a and rails a¹ over the
funnels B. The said rails a¹ support the covering slabs a³ upon which the peculiarly,
formed fire canals K are placed. On each side of and parallel with the said fire
canals I arrange a series of bent tray-formed metal sheets S provided with a hollow
centre C through which the cooling water is passed, all of them being connected by
removable elbow pieces c¹ attached to the pipe ends c.
The whole is faced and held together by the angle irons G.
The floor of the space D is provided with two cooling chambers' c² on each side,
while on the other hand the escape pipe E with its valve e for carrying off the
collected tar is in the centre of the apparatus. In the said cooling space D is also

page_text: situated a slime brush F provided with arms H with steel brushes attached to the
same; this brush is worked by rods passing through packed joints f. According
to the size of the apparatus the said brush should be made in two or more parts,
and the arms must be of suitable strength.
The said apparatus is provided with the necessary valves and cocks.
Having thus fully described the said Invention, and the manner of performing
the same, I wish it understood that I claim,―
First. The arrangement of the fire canals as shewn in the Drawing, and by means
of which the apparatus is heated, the same passing through the midst of the
substances to be distilled.
Second. The funnels arranged under the said canals, as shewn.
Third. The cooling chambers arranged as shewn for partially cooling down the
product within the apparatus.
Fourth. The series of tray-formed metal sheets arranged one above the other, as
shewn.
Fifth. The slime brush provided with arms, as shewn, all in the manner and for
the purposes set forth.
In witness whereof, I, the said Frank Wirth, have hereunto set my hand
and seal, this Ninth day of December, in the year of our Lord One
thousand eight hundred and seventy-eight.
FRANK WIKTH. (LS.)