Improvements in Multiple Punching or Perforating Apparatus.
Year: 1892

page_text: Date of Application, 8th Dec., 1892-Accepted, 11th Feb., 1893
COMPLETE SPECIFICATION.
Improvements in Multiple Punching or Perforating Apparatus.
I, ALBERT MEYER-STAHEL of Mussersihl, near Zurich, Switzerland, Mechanical
Engineer, 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 :-
The multiple punching device forming the subject of this invention offers the
advantage over similar apparatus hitherto employed, that it enables perforations
of any size or shape to be stamped out without the necessity of removing and
replacing either the die or matrix or the punch, the operation of exchanging
these being a well-known and much complained of cause of loss of time, and
frequently of deterioration of mechanism through repeated handling.
The invention will be best understood by reference to the accompanying
drawings in which
Figure 1 is a front view of the novel device.
Figure 2 a side view thereof, and
Figure 3 a section on line a Figure 1.
Figure 1 is a detail view of the operating device and hand-lever.
Figure 4 is a modification of some of the parts of the apparatus.
A are stamp or punch heads of which there may be any suitable number in
juxtaposition, each containing or holding a punch B of suitable size and shape in
section. In Figure 1 for example, a series of punches gradually increasing in size
are shown, the smallest being at one end and the largest at the other. The
article C to be perforated is placed upon the die or matrix E arranged on a suitable
supporting table D.
Between the various punch-heads A, as also between the side walls of the
standard D and the adjacent heads A stationary bars or plates F provided with
projections ff are arranged, the one situated at the extreme end on the right
sustaining the pressure of the screw G. In the standard D, above the punch-
holders A, is arranged a shaft L adapted to receive rotary motion either through
the medium of worm-gearing HJ (Figures 1 and 2) or from the hand-lever K
(Figure 1). On this shaft is mounted a hollow shaft M secured thereto by
screws or other suitable means. To the end of the shaft L, which carries the
wedge or key is fitted either the worm-wheel J (if motive power be used) or a
hand-lever K (if the apparatus is to be operated by hand).
Upon the eccentric hollow shaft M, the presser N is loosely and adjustably
arranged so that it may be set over each or any of the punch-holders or heads A.
When therefore it is desired to make a perforation, the presser is brought over
the punch-head holding the punch of the size corresponding to the diameter of
the desired perforation, after which it is only necessary either to set in motion the
worm-gearing H J or to lower the hand-lever K, as the case may be. The
eccentric hollow shaft M exerts its pressure upon the presser N, and through it
upon the punch-head and punch, which being thus driven downwards punches out a
hole of the required size.
To raise the punch-heads and punches again after they have thus been forced
down the following arrangement is employed: Upon the solid shaft L are mounted
two eccentrics O and P, the relative position of which to the shaft L, and the
strokes of which are exactly similar to the position and extent of motion of the
hollow eccentric shaft M. The rod O' of the eccentric O is at one end connected
with the bar passing under the pins a of all punch-holders A, while to its other
end there is pivotted another bar P₁ connected with a cross-arm integral with the
shear-like pivotted blades Ractuated by the eccentric P. As the shaft L continues

page_text: to revolve, or the hand-lever to be raised, the bar Q and also consequently the
lowered punch-head are raised to their upper positions by the said eccentrics O
and P. Should the machine be unprovided with shear-blades R, the rod P¹is
operated from the eccentric P direct.
In Figure 3 S designates the springs intended to retain the punch-holders in the
raised position. Besides, to facilitate a ready adjustment of the driver or presser N
upon the hollow shaft M, a spring n is provided upon N the stud n' which this
spring carries being exactly co-axial with the vertical punch-holder over which it
is placed, in which position it will engage in a guide-groove n² formed in the
standard D thereby retaining the presser in position and protecting it from
displacement.
T is a stripper and U a guard-plate secured to the standard D and retaining
the punch-heads in the machine so that they cannot drop out of it. R designates
the shears already mentioned before, and operated by the eccentric P, but forming
no part of this invention, as it may if preferred be omitted.
The modified arrangement of which Figure 4 is a diagram comprises a series
of horizontally arranged punch-heads and punches adapted to oscillate or swing on
the pivot y.
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 :-
A multiple punching-device characterized by any number of either horizontal or
vertical punch-holders such as A arranged side by side in a series or row; a hollow
eccentric shaft such as M secured upon a solid shaft L; and a driver or presser
such as N loosely mounted upon the said hollow shaft and adapted to be moved up
to and adjusted over the punch-holder it is desired to operate substantially as
described and illustrated in the accompanying drawings.
Dated this 8th day of October 1892.
W. P. THOMPSON & BOULT,
Agents for the Applicant.