Improved Pantographic Apparatus for Producing Enlarged or Reduced Copies of Modelled Forms.
Year: 1898

page_text: Date of Application, 2nd July, 1898
Complete Specification Left, 23rd Mar., 1899-Accepted, 1st July, 1899
Improved Pantographic Apparatus for Producing Enlarged or
Reduced Copies of Modelled Forms.
I, EMIL UHLMANN, of 15, Eisenbahnstrasse, Berlin, S.O., in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention to be as
follows:
This invention relates to an apparatus, which serves for producing in a
mechanical manner enlargements or reductions from models of plastic objects of
any suitable material.
And the invention consists in an improved enlarging and reducing apparatus,
the main axle H of which is seated turnable at the one end, round itself, and also
in a horizontal position, whilst its other end rolls on a fixed track and which in
connection with the arms A A' and rod w forms a displaceable parallelogram.
Also in the enlarging and reducing apparatus as above, the connection of the main
axle H with a ring guided in rollers u in which ring the loop m is arranged
turnable with the rollers h, between which the one end of the tool carrier
יד
can
be displaced and turn, whilst the other end is seated turnable in the socket e sus-
pended turnable on the arm A. Also in the enlarging and reducing apparatus
as above the forced lateral revolution of the tools q and effected by means of the
pins 1 and 2 and the rod 3.
Referring to the annexed drawings
Fig 1 is a front view of the apparatus.
Fig. 2 is a plan view thereof.
Figs. 3 to 10 show details on a larger scale.
The same reference letters indicate similar parts.
On the support 6 is seated in a bearing plate la frame by means of the pin s
in which frame there are adjustable sliding rollers u, by which a ring r is guided
in a turnable manner by means of a hollow guiding part turned at its periphery
(see details Figs. 3-4). With the ring is connected a bow a which is solidly
connected with the one end of the main axle H, whilst the other end of the latter.
carries a wheel L, which runs on a circular track B.
On the main axle H there are sockets Cheld by means of springs and grooves
in a displaceable manner, and in the sockets C by means of the points i, are
arranged the arms A A¹ turnable round the latter (Figs. 5-6).
The armis A A' are further connected with the rod W held in the blocks V in
a displaceable manner, whilst the blocks V are made turnable on the arms A A'.
By means of the main axle H, the arms A A¹ and the rod W there is formed a
displaceable parallelogram in consequence of the points and blocks.
On the arm A is suspended the socket e turnable round the screw f, in which
socket the tool carrier is seated turnable at one end., whilst its other end is turn-
able and displaceable in rollers h. These rollers h are in a loop m, which is fixed
turnable in the ring r by means of a pin arranged on the top and one below
(Figs. 3-4).

page_text: In the tool carrier g is seated the tool bearing holder n on which latter are fixed
the guiding segments o necessary for its turning movement (Figs. 7-8). Between
these reaches a pin p arranged on the lengthened arm A, in order to effect lateral
displacement.
In the tool carrier g the bearings of the working tools q and t are so arranged
that they can turn round the pins 1 and 2 and this in such a manner, that this
revolution is controlled by the rod 3 (Figs. 7 to 10).
On the tool carrier there is arranged an electromotor 4 and its driving shaft 5
in order to operate the tools g or t according as the apparatus is to be used for
enlarging or reducing.
Dated this 2nd day of July 1898.
HERBERT HADDAN & Co.,
Agents to Applicant.
Improved Pantographic Apparatus for Producing Enlarged or
Reduced Copies of Modelled Forms.
I, EMIL UHLMANN, of 15, Eisenbahnstrasse, Berlin, S.O., in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement; -
This invention relates to a machine which serves for producing in a mechanical
manner enlargements or reductions from modelled forms.
This machine is represented in the drawings left with the Provisional Specifica-
tion in which:
Fig. 1 is a front view.
Fig. 2 is a plan view thereof.
Figs. 3-10 show details on a larger scale.
The same reference letters relate to the same parts. On the support 6 there
is pivoted in a bearing plate by means of the pins a frame k in which frame there
are adjustably mounted rollers u by which a ring is supported. This ring r
turns in or between the rollers and is guided thereon by a hollow guiding groove
turned in its periphery (see details Figs. 3-4).
With the ring is connected a bow a having a shank a¹ which is solidly con-
nected with the one end of the main axle H whilst the other end of the latter
carries a wheel L which runs on a circular track B.
On the main axle H sockets C are held by means of keys and keyways so as to
be displaceable longitudinally and on the sockets C by means of points i there are
pivoted the frames A carrying the arms A' (Figs. 5-6).
The arms A1 A1 (Figs. 1-2) are further connected with the rod W held in the
blocks in a displaceable manner whilst the blocks V are pivoted on the
arms A² A¹.
The main axle H,, the arms A¹ A¹ and the rod W thus form a parallelogram.
On one of the arms A¹ (Figs. 1 and 2) is suspended the socket e pivoted on the
screw f in which socket the tool carrier g is universally jointed at one end,
whilst its other end is turnable and displaceable in rollers h. These rollers h
(details Figs. 3-4,) are journalled in a frame m which is pivoted in the ring
by means of pins above and below.
In the tool carrier g (Figs. 1 and 2) is seated on the left, sliding on rollers, the
tool holder n with tool spindle bearing g', on the former are fastened the guiding
segments o necessary to its axial turning movement.

page_text: Between these reaches a pin parranged on the lengthened arm A¹ in order to
effect lateral displacement On the right in the socket e the second tool spindle
bearing is seated.
Both the tool spindle bearings are arranged so that they can turn round the
pins 1 and 2 in such a manner that they can be brought into a lateral position by
rod 3. If, for instance, an enlarged copy is to made of the model, the model is
put under g, the tool g being formed as a guiding pin and only guided in slight
contact with the model to be enlarged till it has touched all the surfaces of the
figure whilst the tool t is arranged as a cutter and put into rotation by the electro
motor 4 and the shaft 5, to produce the desired enlargement.
If a reduced copy is to be made, the positions of the model and work blank are
reversed, and similarly the positions of the guiding pin and the tool, the guiding
pin being placed at t, and the tool put into rotation at q.
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. An improved apparatus for enlarging and reducing, consisting of the main
beam H which may turn at one end round itself in a horizontal direction, whilst
its other end rolls on a solid track, the said beam in connection with the arms A'A'
and rod w forming a displaceable parallelogram.
2. In the improved apparatus for enlarging and reducing as in Claim 1, the con-
nection of the main beam H with a ring r, guided in rollers u, in which ring the
loop m turns with the rollers h, between which one end of the tool carrier g, can
be displaced and turn, whilst the other end can turn in the socket e pivoted on the
arm A¹.
3. In the enlarging and reducing apparatus as in Claim 1 the lateral revolution
of the guiding pin and tool g and t effected by pins 1 and 2 and by rod 3.
Dated this 23rd day of March 1899.
HERBERT HADDAN & Co.,
Agents to Applicant.
18, Buckingham Street, Strand, London.