Improvements in Machinery for Punching Holes in Bars or Girders.
Year: 1897

page_text: Date of Application, 24th July, 1897-Accepted, 13th Nov., 1897
COMPLETE SPECIFICATION.
Improvements in Machinery for Punching Holes in Bars or
Girders.
I, HUGO JOHN, of the Firm of J. A. John, of Pilse 8, Erfurt, 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 ascertained in and
by the following statement:--
This invention relates to apparatus by which the flanges of bars or girders
(hereinafter called girders) can be punched with holes at all desired parts, the
arrangement being such that the webs of the girders may also be holed in the way
usual heretofore.
The new apparatus consists essentially of two matrices which are arranged to be
movable and adjustable horizontally with relation to each other, and which receive
between them and guide the web of the bar to be holed, so that the flanges of said
bar lie upon the matrices, one of which always corresponds with the punch.
According as for instance, in I girders, the right or left flange is to be punched, the
right or the left matrix is pushed and fixed under the punch. This shifting of the
matrices is effected by simply loosening screw studs moving the matrix sliding
carriages horizontally, and again fastening the whole device by means of screw
studs.
Fig. 1 of the annexed drawing illustrates a longitudinal section through a hole-
punching machine constructed according to this invention.
Fig. 2 is a horizontal section, and Fig. 3 is a cross section of the same.
1 and 2 are plates connected together by means of stay bolts 3 and resting on the
wheels 4; in the centre of said plates is a T-shaped opening for the passage of the
girders, the plates receiving in this opening between them the matrices 5 and 6 which
are mounted on sliding carriages. The top of each of these matrices is bevelled at
its free end (through such bevelled part being formed a hole for the passage of the
punch 7) to correspond with the inclination of the inner surface of the girder flanges,
(about 14 per cent. in the case of standard sections) so that the girder will have a
firm bearing and will not tip during the punching operation. The matrices 5 and 6
are adjustably fixed by means of screw studs 8 and 9 on their sliding carriages 10
and 11, so that the matrices can move on the carriages when the screw studs 8 and 9
have been loosened. By this means the fitting of the punch 7 in the matrix holes is
facilitated, the adjustment of the matrices being effected by means of laterally
arranged screw studs 12 and 13, and 14 and 15, respectively. The nuts of these
screws are constituted by the upwardly directed cheeks 12*, 13, and 14", 15*
respectively of the carriages 10 and 11, said cheeks receiving the matrices 5 and 6
between them.
The screw studs 8 and 9 also serve to guide the stop plates 18 and 19 which are
provided with longitudinal slots 16 and 17, and are situated on the outer parts of the
matrices; the said plates are capable of being adjusted in the longitudinal direction,
and which have the office of guiding the girder to be punched.
The carriages 10 and 11 mounted between the plates 1 and 2, are provided for the

page_text: purpose of better guidance and for preventing lateral movement, with downwardly
directed shoulders 20 and 21, and also with longitudinal slots 22 and 23.
Through these longitudinal slots extend cross pieces 26 and 27 which bear at
their lower part with their shoulders 24. against the plates 1 and 2 or their angle
bars 1 and 2ª and are fastened between the plates 1 and 2 by means of cross bolts 25. 5
These cross pieces receive at their upper ends the screw studs 28 and 29 which serve
for the attachment of the carriages 10 and 11. In order to further ensure the
carriages against longitudinal movement there are arranged laterally between these
and the plates 1 and 2, distance pieces 30 and 31 which are placed flat or on edge
according as the right-hand or the left-hand flange of a girder is to be punched, 1
Thus, for example, in Fig. 1 where the right-hand flange of an I girder is to be
punched, the left-hand distance piece 30 is placed on edge, whilst the right-hand
piece 31 is placed flat. But in Fig. 4 where the left-hand flange of an I girder is to
be punched, the left-hand distance piece 30 is flat whilst the right-hand piece is.
placed on edge. Fig. 5 is a partial cross section through my new hole punching 1
machine showing how the webs of the girder are to be punched. For this purpose
there are riveted to the lowermost end of the opening or T-shaped aperture in the
plates 1 and 2, the outwardly projecting angle pieces 32 and 33, in the horizontally-
situated legs of which there are holes which allow of fixing the cylindrical inatrix 36
by means of screw bolts 34 and 35. In this case the carriages 10 and 11 must be
removed with the matrices 5 and 6 after loosening the screw studs 8, 9 and 28, 29
together with the distance pieces 30 and 31. Between the steel support 46 that
carries the punch 7 and the eccentric 37 there is inserted each time before the
punching operation the wedge 38 which has a shank or handle 39, which wedge is
removed again after the punching.
The raising of the punch 7 after the punching operation and after the return of
the eccentric lever 40 into the position of rest, is effected by means of a two-armed
lever 42 which is pivoted at 41 between the plates 1 and 2; said lever 42 being
movably connected or pivoted at 43 to a downwardly leading angle piece 44.
This angle piece 44 engages with its free end 45 in an opening in the support 46 3
and raises the latter when the hand-lever 42 is depressed, the arrangement being
such that strippers 47 and 48, Fig. 3, prevent the punched girder from rising up as
well.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed 1 declare that what I 3
claim is -
'
1. A portable machine for punching holes in iron of various sections, comprising
two removable matrices 5 and 6 which are arranged so as to be adjustable relatively
to each other in a horizontal direction, and which are designed to receive between
them the girders to be punched and are suitably bevelled on the surfaces upon which
the girders bear for the purpose of providing a good bearing therefor, the said
matrices being fixed upon sliding carriages 10 and 11, which are mounted in an
adjustable manner between plates 1 and 2 which carry the punch-driving mechanism,
in such a manner that either one or the other matrix can be adjusted to co-operate
with the punch 7, substantially as described.
2. In apparatus of the kind referred to in Claim 1 attaching the matrices 5 and 6
by means of screw studs 8 and 9 to the sliding carriages 10 and 11 the latter being
guided in longitudinal slots 22 and 23 along cross pieces 26 and 27 that are fixed
vertically between the frame plates 1 and 2 by means of cross bolts 25, and being
capable of being fixed by means of the screw studs 28 and 29 of said cross pieces,
whereby a further exact adjustment of the punch in the matrix holes is facilitated,
the arrangement being such that the matrices 5 and 6 which are movable about the
loosened screw studs 8 and 9 can be brought into the proper position between
cheeks 12 and 15ª of the carriages 10 and 11 by means of set screws 12 and 15, and
the work being guided between stop plates 18 and 19 which are arranged to be
capable of being moved and adjusted on the matrices, substantially as described.
4

page_text: 3. In a hole-punching machine of the kind referred to in Claim 1, the arrangement
of angle pieces 32 and 33 for the reception of a cylindrical matrix 36 which is
adapted to be fixed by means of screw bolts 34 and 35, substantially as described.
4. The machinery for making holes in bars or girders shewn in and described with
reference to the accompanying drawings.
Dated this 24th day of July 1897.
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.