AN IMPROVED FINISHING ROLLING MILL
Year: 1881

page_text: LETTERS PATENT to Lorentz Albert Groth, K.G.V., Civil Engineer and
Proprietor of the Scandinavian Patent Office, under the Firm of L. A. Groth
& Co., 97, Finsbury Pavement, London, and 20, Forhaabningsholms Allee,
Copenhagen, for an Invention of "AN IMPROVED FINISHING ROLLING MILL."
A communication from abroad by Ernst von Zweigbergk, of Smedjebacken,
in the Kingdom of Sweden.
PROVISIONAL SPECIFICATION left by the said Lorentz Albert Groth at the
Office of the Commissioners of Patents on the 3rd March 1881.
LORENTZ ALBERT GROTH, K.G.V., Civil Engineer and Proprietor of the
Scandinavian Patent Office, under the Firm of L. A. Groth & Co., 97, Finsbury
Pavement, London, and 20, Forhaabningsholms Allee, Copenhagen. "AN IMPROVED
FINISHING ROLLING MILL." A communication from abroad by Ernst von
Zweigbergk, of Smedjebacken, in the Kingdom of Sweden.
The improved rolling mill consists of two housing frames, between which are
placed a pair of horizontal and a pair of vertical rollers. The horizontal rollers.
receive rotary motion in the ordinary way, but the vertical rollers receive theirs
through a special arrangement of wheel work and friction clutch. One pair of
rollers determines the thickness, and the other pair the width of the iron to be
rolled. One of the rollers can be raised or lowered by means of a friction clutch
on the end of the roller axle. This clutch revolves with the roller by means of a
feather key fixed in the axle, but by pushing the clutch towards one or other of
two bevil wheels the axle is turned in either direction according to which of the
two bevil wheels is in gear with the clutch. On the upper end of the axle is fixed
a pinion connected with gearing on the top of the frames, which communicates
motion to the screws whereby the raising or lowering of the roller is effected. The
roller brasses are supported by four iron rods from a cross head carried by the
Prins 77

page_text: screws, and are thus caused to follow the up or down movements of the latter.
Spiral springs surround the upper parts of the said rods and replace the weights
heretofore in use. The vertical rollers are moveable on two bars; one of these
rollers only requires to be moved occasionally, and is fixed to the frame and bearing
by screws. The other roller on the contrary has to be shifted very often, and this 5
is effected by wheel work which causes appropriate serews to move the brasses,
roller, and box in a horizontal direction.
In order to regulate the lowering of the roller, a scale and index is applied to
the screw, shewing the degree of rolling that is to be given to the iron.
To prevent the iron from twisting after it has left the rolls a guide is applied 1
which may be raised or lowered by means of a lever and adjusting screw.
This guide may be used for two as well as for three rollers.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Lorentz Albert Groth in the Great Seal Patent Office on the
2nd September 1881..
LORENTZ ALBERT GROTH, K.G.V., Civil Engineer and Proprietor of the
5 Scandinavian Patent Office, under the Firm of L. A. Groth & Co., 97, Finsbury
Pavement, London, and 20, Forhaabningsholms Allee, Copenhagen. "AN IMPROVED
FINISHING ROLLING MILL." A communication from abroad by Ernst von
Zweigbergk, of Smedjebacken, in the Kingdom of Sweden.
In Sheet 1 of the accompanying Drawings Fig. 1 represents an elevation of a
Orolling mill constructed in accordance with this Invention, and Fig. 2 a plan of the
same. Fig. 1, Sheet 2, is a transverse section through Figs. 1 and 2 of Sheet 1;
Fig. 2 of Sheet II. is a side elevation of the brass bearing of the vertical roller b¹
(see Sheet 1); Fig. 3, a section on line A, B, of Fig. 2; Fig. 4, à sectional plan, and
Fig. 5 a plan of crosshead Z of Figure 4. Figs. 1, 2, and 3 of Sheet III. are
respectively longitudinal sectional elevation, plan, and side elevation of one of the
vertical roller spindles and cross head guides.
Figs. 1, 2, 3, 4, 5, and 6 of Sheet IV. represent various detail views of the guide
apparatus seen at X in Sheet I.
The improved rolling mill consists of two housing frames A, A, between which
are placed a pair of horizontal and a pair of vertical rollers. The horizontal
rollers a, a', receive rotary motion in the ordinary way, but the vertical rollers 6, 6¹,
receive theirs through a special arrangement of wheel work d, d', friction clutch c,
axle e, and the bevil wheels g, f, and g, f. The pair of rollers a, a¹, determines the
thickness and the other pair b, 61, the width of the iron to be rolled.
The roller a can be raised or lowered by means of a friction clutch on the end
of the roller axle. This clutch revolves with the roller by means of a feather key
fixed in a prolongation of the axle, but by pushing the clutch towards one or other
of two bevil wheels i or i¹ the upright shaft j is turned by the bevil wheel k in
either direction, according to which of the two bevil wheels i or i¹ is in gear with
the clutch h. On the upper end of the shaft j is fixed a pinion connected with
gearing on the top of the frames which communicates motion to the screws 1, 1,
whereby the raising or lowering of the roller is effected.
The roller brasses are supported by four iron rods, from which a crosshead m carried
by the screws 1, 1, and are thus caused to follow the up or down movements of the
latter. Spiral springs n, n, surround the upper parts of the said rods and take
the place of the weights heretofore in use.
The vertical rollers are movable on two bars. The roller b only requires to
be moved occasionally and is fixed to the frame and bearing by screws, which aro
not shown in the Drawings. The other roller b' on the contrary has to be shifted
very often, and this is effected by turning the handle wheel p which communicates
motion through bevil gearing or spindles q, q¹, q², to the horizontal traversing
screws r,, 1, 111, the brasses 8, s¹, s¹¹, the roller 6', and one side of the guide
box t being thus caused to move simultaneously in a horizontal direction.
In order to regulate the lowering of the roller a, an adjustable scale and index n¹
is applied to one of the screws 1, and comes against a stop v to define the degree of
rolling that is to be given to the iron.
To prevent the iron from twisting after it has left the rolls a guide x is applied
which may be raised or lowered by means of a lever y and adjusting screw. This
guide may be used for two as well as for three rollers.
Having now described the nature of the said Invention, and the manner in
which the same is to or may be carried into effect, I would have it understood
that what I claim is,-
First. The guide x, arranged and operated as hereinbefore described and

page_text: illustrated in the Drawings, for the purpose of preventing the bar of iron from
twisting, and for forcing the said bar to keep its rectangular shape.
Second. The mechanism for raising and lowering speedily and accurately the
upper roll a, constructed, arranged, and operated as hereinbefore described and
illustrated in the Drawings.
Third. The mechanism applied to the vertical rollers b, 61, whereby they can be
adjusted, so that the whole length of the rollers a, a¹, or a part thereof only may
be utilized, as hereinbefore described and illustrated in the Drawings.
Fourth. The use of the spiral springs n for balancing the roller a, instead of the
weights usually employed for that purpose, as hereinbefore described and illustrated
in the Drawings.
In witness whereof, I, the said Lorentz Albert Groth, have hereunto, set my
hand and seal, this Thirty first day of August, in the year of our Lord
One thousand eight hundred and eighty one.
LORENTZ ALBERT GROTH. (L.S.)