Improvements in Punching, Shearing, Bending, and like Presses or Machines.
Year: 1894

page_text: COMPLETE SPECIFICATION.
Improvements in Punching, Shearing, Bending, and like Presses or
Machines.
I, JOHAN PETTER JOHANSSON, of Enköping, in the County of Upland, in the
Kingdom of Sweden, Manufacturer, 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 :-
As is well known, some rotating machine-tools, such as lathes and screw and nut-
making machines, are provided with so-called turrets containing the shaping tools,
the required tool being brought into its proper position by revolving the said turret,
which simple proceeding removes the necessity, previously existing, of exchanging
tools when a new operation is to be performed. The need of such labour-saving
machines appears to be on the increase.
The object of my present invention is to apply such revolving turrets, provided
with holders for different tools, to presses and punching-machines, i.e. to non-
rotating machines, and thereby make such machines readily adjustable for different
operations.
In the accompanying drawing,
Figure is an elevation of a turret-punch constructed according to my
invention.
Figure 2 is a transverse section on the line A-B of Figure 1, and
Figure 3 is a section through the turrets.
a is the frame and the punching-lever, pivoted to a stud c and at the forward
end embraced and guided by a staple d. The front ends of the frame and the
punching lever are provided with teeth or jaws e and trunnions, on which are
placed the two revolving turrets h and . These turrets are provided at the rear
with teeth corresponding to the teeth e of the frame and punching lever. In the
holders are fixed the tools y for punching holes, for shearing plates, flat or round
iron, square iron, angle-iron and the like, and for bending and other operations
usually performed in a press or punching-machine.
In the outer end of each trunnion f, is screwed a studi, provided with a washer,
the corresponding turret being firmly secured in its place by screwing up this
stud. When the bolts are loosened, the turrets can be drawn out until their
respective teeth are disengaged from the teeth e on the frame after which the
turrets can be turned round so as to bring the corresponding tools directly opposite
each other, the other tools being at the same time removed from their working
positions. The turrets are then pushed in, so that their teeth will again engage
the teeth e and the studs are screwed up so as to firmly secure the said turrets in
place.
From the frame a projects a hub k, through which passes a shaft l, provided at
one end with an eccentric pin m fitting into a block o, inserted into a recess n in
the punching-lever b. When the shaft is oscillated or rotated, the punching-
lever is caused to reciprocate on the stud c.
I wish it understood that the construction of the punching-machine may be varied
and does not constitute part of the present invention, thus for instance instead of
the pivoted punching-lever b, use may be made of an arm adapted to move straight
upward and downward. In like manner the turrets may be locked or secured in
position by bolts or springs instead of by teeth or jaws.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
An improved turret punching-machine consisting of an ordinary punching
machine provided with one fixed and one movable part, on each of which is
arranged a revolving turret provided with tool-holders, for the purpose of enabling
the two corresponding tools, required for a punching operation, to be brought into
their proper positions by revolving the said turrets.
Dated this 18th day of June 1894.
HASELTINE, LAKE & Co.,
45. Southampton Buildings, London, W.C., Agents for the Applicant.