Improvements in Power-presses.
Year: 1892

page_text: Date of Application, 13th Apr., 1892
Complete Specification Left, 13th Jan., 1893-Accepted, 25th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in Power-presses.
I, NORMAN CHARLES STILES, of Middletown, Connecticut, U.S.A. Engineer,
do hereby declare the nature of this invention to be as follows:
This my invention relates to certain new and useful improvements in that class of
power-presses in which the body is hung in the frame so as to swing backward and
forward upon an axis, and further to that class of press in which the slide receives
a reciprocating movement through a pitman operated by an eccentric on the
driving-shaft hung in the said body.
A
By this invention I construct the sides of the frame with segment-shaped slots
which are concentric with the axis upon which the body of the press swings.
shaft extends through the body, but is loose therein for free rotation. Said shaft
extends through the said slots in the respective sides of the frame. The frame is
constructed with a segmental toothed rack concentric with the said slots. A pinion
upon the shaft is adapted to work in the rack, and a winch-handle is applied to the
shaft for the purpose of rotating it.
Upon the driving-shaft which imparts motion to the press I mount a loose
eccentric which is constructed with an annular flange concentric with said shaft-
eccentric. A concentric disc is made fast to said shaft and adjacent to said annular
flange. By means of suitable mechanism, such as a clutch arranged between the
flange and disc, the flange and its loose eccentric may be interlocked. The pitman
which imparts reciprocation to the slide surrounds the loose eccentric, and derives
its motion therefrom when interlocked with the disc aforesaid.
Dated this 12th day of April 1892.
W. H. MUNNS,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Power-presses.
I, NORMAN CHARLES STILES, of Middletown, Connecticut, U.S.A., 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 invention relates to an improvement in power-presses-that is, presses for
punching, drawing, etc.-with special reference to that class of presses in which the
body is arranged to tilt, so that the body, the bed, and the operative mechanism may
stand in a vertical or at any desired position which the convenient operation of the
presses may demand, parts of the invention, however, being applicable to presses
which do not possess this tilting feature.
The object of the first part of the invention is to produce a simple & convenient
mechanism for tilting the body of the press and yet clamping it so firmly in the
frame as to rigidly hold it when adjusted to the desired position.
The second part of the invention relates to an improvement in the adjust-
ment of the extent of the reciprocating movement imparted to the slide of the
press.
The invention consists in the construction as hereinafter described, and particularly
set forth in the claims.
In the drawings,
Fig. 1 is a side view of the press, the tilted position being indicated by broken

page_text: Fig. 2. is a front view of the same;
Fig. 3. is a partial side view shewing the pinion-shaft and nut-handle;
Fig. 4. is a transverse section through the slide and shaft on the line of
Fig. 7;
Fig. 5. is a transverse section on the line yy of Fig. 7, shewing the loose eccentric
in the position of its extreme throw ;
Fig. 6. is the same as Fig. 5, but shews the loose eccentric turned to the opposite
position;
Fig. 7 is a longitudinal central section on line xx of Fig. 4, shewing side view of
the shaft; and
Fig. 8, is a detached transverse section through the disc d, illustrating means for
its attachment to the shaft.
A represents the two sides or frame of the press. These extend upward, and
between them the body B is hung upon trunnions B', formed on the body, the said
trunnions being supported in the frame and, as represented in Fig. 2, a portion of
the body and frame is broken away at the left for illustration. The shaft C of the
press is supported in the body and extends, preferably, concentrically through the
trunnions. The body thus hung between the sides of the frame is adapted to swing
backward and forward between the sides, as from the position indicated in Fig. 1. to
that indicated in broken lines, in the same figure; but the invention is not to be
understood as limited to this particular construction for supporting the body as upon
an axis, for this construction any of the known constructions for a similar movement
of the body may be employed, it only being essential that the body shall be adapted
to swing or turn in the frame as upon an axis.
In the body the reciprocating slide D is arranged, and movement is imparted to
the slide D from an eccentric upon the shaft through a connecting-rod E in the
usual manner, power being applied to the shaft through a driving-wheel F, adapted
to engage and disengage the driving-shaft at predetermined times within the control
of the operator in the usual manner, it not being necessary to describe such
mechanism in this Specification, as that mechanism constitutes no part of this
present invention.
In the sides A of the frame segment-shaped slots G are formed, the curve of the
slots being from the centre on which the body of the press swings. These slots are
of a length corresponding to the extent of adjustment which may be desirable for
the body of the press. Transversely through these slots, a shaft H extends from
side to side. This shaft also passes through the body of the press, as indicated in
Fig. 1, the shaft taking its bearing in the body so as to revolve freely, and the parts
of the shaft which lie within the slots G move through the slots as the press is
turned forward or backward.
In Fig. 1. the position of the press is represented as upright-that is, in its
extreme rear position-the shaft H stands at the extreme rear ends of the slots.
The shaft H carries a pinion I between one side of the frame and the corresponding
side of the press, as seen in Fig. 2, and the said pinion works in a rack J, fixed to
the frame in a curve concentric with the curve of the slot G. Upon one end of the
shaft, preferably at the end opposite the pinion, a head K is formed or applied to
take a bearing upon the outside of the frame, as seen in Fig. 1, so as to resist the
movement of the shaft towards the other end, and on that side between the body of
the press and the frame a collar L is arranged. This collar is loose upon the shaft,
and in thickness corresponds to the normal distance between that side of the frame
and the corresponding side of the body of the press. At the opposite side the
pinion 1 has a position upon the shaft the same as that of the collar L upon the
other side, but so as to allow a longitudinal movement of the shaft, the pinion being
connected to the shaft, so as to revolve with it, but yet allow such longitudinal
movement of the shaft independent of the pinion. Such engagement may be made
by the common spline and groove, not necessary to be illustrated.
Upon the shaft outside the frame, opposite to that side where the head K is
arranged, a nut M is applied to the shaft, the nut preferably having a handle N as

page_text: convenient means for turning the nut, and to the shaft outside said nut a crank O is
applied as a convenient means for turning the shaft. When the body of the press
stands at the desired position, the nut M is turned hard up, which brings the head K
of the shaft against its side of the press and clamps the collar L between the frame
and the press on that side, and correspondingly clamps the pinion I between the
side of the body and the frame on that side, thus making a firm rigid binding of the
fraine and body together at a point near the bottom of the body of the press, so
that the press as a whole will stand firm and strong. When adjustment of the body
of the press is desired, the nut M is unscrewed to relieve the before-mentioned
clamp between the body of the frame. Then the body is free to swing, and the
crank O being turned accordingly the pinion I will revolve with the shaft and travel
upon the rack J, carrying with it the lower end of the body, until the desired
position is attained or until the end of the slot is reached, the extreme tilting
position being represented in Fig. 1. in broken lines. Whenever the desired
position is attained, the nut M is again turned to produce the afore-mentioned
clamping between the frame and body, and the body and frame will be held firmly
clamped at any position at which it may be adjusted between the two extremes.
This arrangement of the rack, pinion, and crank makes the adjustment easily
controlled by the operator, & is so simple in its construction and operation as not to
be liable to derangement. Good results, so far as the adjustment of the body of the
press is concerned may be produced without the clamping effect described.
therefore may be omitted.
This
The second part of the invention is represented in detail in Figs. 4, 5, 6, and 7.
The shaft C is constructed with a crank-pin or eccentric a, from which the slide D
derives its motion by connection therewith through the pitman E as before described.
On this crank-pin u an eccentric b is arranged loose on the said crank-pin-that is,
free for rotation. The eccentricity of this eccentric 6 is or may be the same as that
of the crank-pin or eccentric a, as seen in Fig. 4. The eccentric b works through
the head c of the pitman E, and made fast to the shaft is a disc d, here represented
as divided and clamped upon the shaft (see Fig. 8) but for which means of securing
any of the known devices may be substituted. The disc d is concentric with the
crank-pin. The edge of the disc d is constructed with a series of notches f on its
periphery (see Fig. 4) & the eccentric b is constructed with a corresponding annular
flange g, (see Fig. 7,) the disc y having a dog made fast to it at one point and
adapted to interlock with the corresponding notch f in the disc g. This dog is held
by a screw i in such interlocked position. This interlocking of the eccentric b with
the disc d holds the eccentric b fast to the shaft, so that it will revolve with the
shaft. If the eccentric be 'thus locked in position with its longest radius in line
with the longest radius of the eccentric a, as seen in Fig. 5, then the throw of the
slide will correspond to the combined eccentricity of the two eccentrics a b; but if
the eccentric be turned to the opposite extreme, so as to bring the longer radius of
the eccentric b to coincide with the shorter radius of the eccentric a, then the
eccentric b will be brought into position concentric with the shaft, and so that in the
rotation of the shaft no movement will be imparted to the slide. Consequently any
intermediate position of the two eccentrics with relation to each other between these
two extremes will impart to the slide a movement corresponding to the eccentricity
so produced, and any desired movement of the slide between these two extremes
may be produced by adjusting the eccentric b accordingly.
I have represented the eccentric as interlocked by means of a dog engaging
corresponding notches in the periphery of the disc d; but for this dog any of the
known equivalents for interlocking may be substituted, it only being essential that
provision shall be made for the interlocking of the eccentric b at any point to which
it may be adjusted with relation to the crank or eccentric a.
To adjust the elevation or depression of the slide without change in the extent of
its throw an eccentric is arranged upon the eccentric b within the head c of the
pitman, the eccentricity of this eccentric / corresponding to the extreme adjustment.
of this character required for the slide. A portion of the periphery of the

page_text: eccentric is toothed as seen in Figs. 5 & 6, & the head cof the pitman is constructed
with a bearing m to receive pinion n, the teeth of which may work into the teeth of
the eccentric, and, as represented in Fig. 4, the pinion n being provided with
a suitable handle p, whereby the said pinion may be rotated when so placed in its
bearings, & by such rotation of the pinion the rotation of the eccentric / is produced
to adjust the slide. The bearing m is constructed with an opening r into it, so that
the pinion may be removed or applied whenever the adjustment is desirable. To
clamp the said eccentric / when the proper position is attained, the head C of the
pitman is divided at the top, as at s or any desirable point, & at this division
the parts are secured together by a bolt t, so that by the turning up of the bolt the
head C may be so firmly clamped upon the eccentric as to prevent accidental
rotation of said eccentric. Then when the adjustment of the eccentric is desired
the bolt t is released until the desired position is again attained, when the eccentric
will be again reclamped. This adjustment of the eccentric is a well known
expedient in power-presses known as the "Stiles and Parker Power Presses."
Having now particularly described and ascertained the nature of this my said
invention, & in what manner the same is to be performed, I declare that what I
claim is :-
-
The herein-described improvements in power-presses, all substantially as and for
the purposes hereinbefore set forth and fully illustrated in the drawings hereunto
annexed.
Dated thin 19th day of Tamuame
W. H. MUNNS,
Applicant's Agent.