Improvements in Machines for Punching and Shearing Iron and Steel Plates or Bars.
Year: 1897

page_text: Date of Application, 16th Feb., 1897-Accepted, 27th Mar., 1897
COMPLETE SPECIFICATION.
Improvements in Machines for Punching and Shearing Iron and
Steel Plates or Bars.
I, MOSES HENRY CAMERON, of Cliff House, Dartmouth, in the County of
Devon, 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 :-
This invention relates to improvements in that class of machines for punching
and shearing iron or steel plates and bars used by ship-builders, roof and girder
makers wherein the punch and shear is actuated by levers and cams, the object
being to provide means whereby such machines can be also used for cropping and
shearing iron and steel bars.
To this end my improvements consist in combining with one or both sides of
an ordinary cam and lever punching and shearing or a double ended lever punching
machine, a rocking lever or diagonal slides actuated by an eccentric or eccentrics
formed on the end or ends of the main shaft and carrying knives operating in
conjunction with stationary knives, the part carrying the latter being either cast or
bolted to the body of the machine as may be found most convenient.
And in order that my invention may be more fully understood I have caused to
be appended hereunto two sheets of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1, Sheet I, and Figs. 3 & 4, Sheet II, are side views, and Fig. 2, Sheet I, a
vertical section at line A-A of Fig. 1, showing my improvements carried out in
various ways. Fig. 2*, Sheet I, shows a number of sections of iron or steel bars
which can be cropped or sheared in my improved machine.
Referring to the figures generally, a represents the body, b the main shaft of an
ordinary cam and lever punching and shearing machine or double ended lever
punching machine with which, according to one form of my invention, see Sheet I,
1 combine an eccentric c formed on the end of the shaft b, (or on both ends)
actuating a rocking lever d and carrying knives e, e, operating alternately in
conjunction with stationary knives e¹, e¹, fixed to a seating cast to the body a or
bolted thereto, as shown in dotted lines and as may be found most convenient.
The said two pairs of knives form each a shear and are arranged to crop or shear
bars of various sections, for instance such as shown in Fig. 2*, in reverse positions,
i.e. right and left handed.
In the body a of the machine openings 9, 9, are formed to receive the bar to be
sheared which permits of shearing any desired length, the piece cut off being
removed from the opposite side of the machine or the short pieces may drop into a
pit formed underneath the machine; h, h, are stop pieces which can be inserted or
withdrawn, so as to engage or disengage the rocking lever d at will and is the pin
upon which the lever d rocks.
Referring to Fig. 3, Sheet II, of the drawings, according to another form of my
invention I may employ movable knives e, e, which are carried by diagonal
slides,, in conjunction with the stationary knives e¹, e', and seating f, which
slides are also actuated from an eccentric c on the inain shaft b of the machine.
A modification of my invention consists in reversing the position of the knives e, e',
as shown in Fig. 4, that is in fixing the bottom knife e' on the slide i (or rocking

page_text: lever d, Sheet I) and the top knife e onto the seating f, which for some purposes
may be found more convenient.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim, is-
A punching, or punching and shearing machine of the type hereinbefore referred
to, formed or furnished at one or both sides with means for shearing iron or steel
bars of various sections, substantially as and in the manner set forth.
Pared this 10th day of February 1897.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.