metal, and for similar Purposes.
Year: 1885

page_text: metal, and for similar Purposes. ·
I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co, Patent Agents,
Southampton Buildings in the County of Middlesex do hereby declare the nature -
of my invention for "IMPROVEMENTS IN MACHINE FOR PUNCHING AND DRAWING
SHEET-METAL, AND FOR SIMILAR PURPOSES " 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 machines for punching and drawing
sheet metal, and in which a bed is provided to support the fixed die, and has above
it a slide arranged for vertical reciprocation and carrying a punching or drawing
die; and commonly called "power presses" and it relates particularly to that class
of machine in which the bed is made adjustable so as to stand at different angles,
for the convenience of the workman.
As heretofore constructed the whole mechanism of the press has been arranged
to swing or rock upon bearings below the bed; and such movement has been upon
an axis below the axis of the driving-shaft, so that the shaft itself necessarily
moves with the rest of the press in an arc of the circle from such centre. Such
movement of the shaft and its pulley necessarily produces a change in the tension
of the belt, occasioning difficulties which are too apparent to require particular
description.
The object of the first part of my invention is to produce the swinging or
angular adjustment of the press, without disturbing the position or centre of the
shaft, that is to say, to make the swinging movement about the shaft as its centre;
and this part of my invention consists in hanging the frame, which supports the
bed and slide, upon bearings concentric with the shaft, and about which the said
frame may swing as a centre of motion without disturbing the axial centre of the
driving shaft.
The object of the second part of my invention is the adjustment of the slide
with relation to the bed, whereby, it may be set at different distances from the bed

page_text: in the adjustment of the dies, and without changing the throw of the eccentric;
and this part of my invention consists in a circular disc, arranged in the head of
the pitman and adapted to eccentrically embrace the eccentric in the driving-shaft,
the axes of the driving eccentric and of the disc being parallel, and the said disc, in
the pitman head, being constructed with teeth upon its periphery. A lever is hung
in the pitman so as to swing in a plaue parallel with the plane of the disc, and
has a segment having teeth corresponding to the teeth in the disc and adapted to
work therein, all as more fully bereinafter described.
In the accompanying drawing
Figure 1 is a perspective view of the press complete.
Figure 2 is a side view of the same, illustrating the means for adjusting the
press.
Figure 3 is a longitudinal section drawn to an enlarged scale through the
bearings supporting the shaft.
Figure 4 is a vertical central section drawn to an enlarged scale of the pitman
at right angles to the axis of the eccentric or crank pin driving it and showing in
side view the adjusting lever.
"
Figure 5 is a face view of the same.
A A are two uprights, which form the general support for the press; and B is
the frame which carries the bed C as an integral part of it, and upon which bed
the fixed dies may be arranged, in the usual manner. The frame B is constructed
with guides for the arrangement and movement of the slide D, also in the usual
manner. At the upper end the frame B is constructed with a trunnion E at
each side, larger than the shaft by means of which the press is to be operated;
these trunnions have bearings respectively in the uprights A A so that the frame,
with the bed and the slide it carries, may swing on said trunnions as the centre
of motion, and as indicated in figure 2, so that the bed may stand at any desired
angle.
Longitudinally through the upper portions of the frame B, and concentric with
the trunnions E, the shaft F is arranged, in the usual manner, and provided with,
the usual driving-wheel G and the connections therewith. Between the two parts.
of the frame the shaft is constructed with the usual eccentric H, which through
the pitman I, communicates reciprocating movement to the slide D, the eccentric
operating through said pitman in substantially the usual manner.
The frame is adjusted to its different angles by means of a toothed segment L,
on the back of the frame and into which a worm M works, so that by turning the
worm, say by a crank N, the frame may be thrown outward, as indicated in broken
lines, or in the opposite direction, and to any extent to which it is desirable to
incline the press.
This device affords an easy and convenient means of adjusting
the press, but I do not wish to be understood as limiting this part of my invention
to such means of adjustment.
While I prefer to construct the frame B with trunnions to take bearing in the
uprights, and so as to swing independent of the shaft, the frame may be hung
directly upon the shaft, that is, the trunnions may be dispensed with, as indicated
in broken lines in figure 3.
The pitman I is constructed with a divided head, the division being parallel with
the axis of the shaft and the two parts secured together by screws a a. In the
head between the two parts a circular recess is formed to receive a disc b, which
disc is considerably larger than the eccentric H on the shaft. For convenience this
disc is made in two parts which are interlocked by a rib and groove, as shown in
Figure 4, or otherwise. The axis of the disc b is parallel with the axis of the shaft,
and through the disc b is an eccentric opening d corresponding to the eccentric H
on the shaft. The disc is constructed with gear teeth e on its periphery. The said
disc is adjustable in the head, or it may be firmly clamped and placed so as to be
fixed in the head by the screws a a. On one side, preferably the front of the
pitman, a lever f is arranged to swing in a plane parallel with the disc, the said
lever being constructed with a toothed segment h, the teeth of which correspond to'

page_text: the teeth in the disc b; it is also constructed with a trunnion upon each side,
concentric with the segment h. On the front side of the pitman projections l, m
are formed, one above the other, but distant from each other somewhat more than
the diameter of the trunnions i, and upon the adjacent faces of the projections l, m
a seat o is made to receive the trunnions i of the lever, so that resting, say, in the
lower bearings, a downward movement of the lever will turn the disc b accordingly,
or an upward movement of the lever will throw it into the bearing o above, and
turn the disc in the opposite direction; or if the lever be lifted to take the
trunnions from the lower bearings, it may be removed through the opening n
between the two bearings, so that when not required for use in the adjustment of
the disc b the lever may be removed.
The adjustment of the disc b lengthens or increases the pitman, accordingly as
the centre of the opening d is moved upward or downward, a well known
adjustment in pitmans.
By making the disc b in two parts, as shown, it is readily applied to the
eccentric H between the two parts of the frame; this division is necessitated
because the shaft is parallel with the plane of the slide instead of at right angles
thereto, as in the more general construction of presses.
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
First. In a power press, the frame of the press, carrying the bed and slide,
constructed with trunnions projecting at each side at the upper end in a plane
parallel with the slide, the said trunnions being supported in bearings in uprights,
whereby the bed and all it carries may swing on said trunnions as a centre of
motion; combined with the driving-shaft passing concentrically through said
trunnions, the said shaft being constructed with an excentric and provided with a
pitman connecting said eccentric to said slide, substantially as described, whereby
the said swinging movement of the frame is made concentric with the driving-
shaft.
Second. In a power press, the combination of the uprights having bearings
through which the driving-shaft extends, and the frame, carrying a slide and
die-bed, hung between said uprights, the said shaft being parallel with the slide
carried by the frame, and serving as a centre about which said frame and all it
carries may swing without changing the relation of the slide to the die-bed,
substantially as described.
Third. In a power press, the frame of the press, carrying the bed and slide,
constructed with a trunnion projecting at each side at the upper end in a plane
parallel with the slide, the said trunnions being supported in bearings in uprights,
whereby the bed and all it carries may swing on said trunnions as a centre of
motion, combined with the driving-shaft passing concentrically through said
trunnions, and constructed with an excentric and provided with a pitman con-
necting said excentric to said slide, sub-tantially as described, whereby the said
swinging movement of the frame is made concentric with the driving-shaft; and
mechanism, substantially such as described, for adjusting the inclination of the
said frame.
Fourth. In a power press, the combination of the uprights forming bearings
through which the driving-shaft extends; the frame, carrying a slide and die-bed,
hung between said uprights, the said shaft being parallel with the slide carried by
the frame, and serving as a centre about which said frame and all it carries may
swing as its centre of motion without changing the relation of the slide to the
die-bed; and the mechanism, substantially such as described, for adjusting the
inclination of the said frame, substantially as described.
Fifth. A pitman having a circular recess at its head, the axis of which is parallel
with the axis of the driving-shaft, combined with a circular disc b arranged in said
recess, and constructed with an excentric opening d parallel with its axis, the said

page_text: disc being divided into two parts in the plane of its axis, and of the axis of the
said excentric opening, and also constructed with teeth upon its periphery; and
with a lever f hung in said pitman, and arranged to swing in a plane parallel with
the plane of said disc, the said lever being constructed with a toothed segment h
corresponding to the teeth on the periphery of the disc, substantially as, and for
the purposes, described.
Sixth. A pitman having a circular recess in its head, the axis of which is parallel
with the axis of the driving-shaft, combined with a circular disc arranged in said
recess and constructed with an excentric opening d, the axis of which is parallel
with the axis of the disc, the said disc being constructed with teeth upon its
periphery; with the projections 1, m in the plane of said disc, so arranged as to
leave a space n between said projections each of which is constructed with
bearings o parallel with the axis of said disc; and with the lever f constructed with
trunnions i adapted to rest in either of said bearings and also to pass in and out
through the said space n, the said lever being also constructed with a segment h
having teeth corresponding to the teeth on the periphery of the disc b, substantially
as, and for the purposes, described.
HASELTINE, LAKE & Co.,
For the Applicant.