Improvements in Press Stop Motions and Means for Adjusting Press-slides, applicable to all kinds of Cutting-out, Pressing, Rivetting, Shearing, and Forging Machinery.
Year: 1892

page_text: Date of Application, 13th Jan., 1892
Complete Specification Left. 13th Oct., 1892-Accepted, 10th Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Press Stop Motions and Means for Adjusting
Press-slides, applicable to all kinds of Cutting-out, Pressing,
Rivetting, Shearing, and Forging Machinery.
DANIEL SMITH Junior Castle Iron Works Raglan Street Wolverhampton
Staffordshire Mechanical Engineer do hereby declare the nature of this invention
to be as follows :-
The object of these improvements is the construction of a press slide, containing
a means of arresting the descending motion of slide by hand or foot power in
combination with means for effecting a vertical adjustment in the position of the
slide as may be required to suit tools of variable height. The chief improvement.
in the proposed stop motion and means of adjustment is their solidity.
I will first describe the stop motion. This consists of a box caused to slide :
vertically within another box within the slide. In a recess beneath the smaller box
but resting on the lower face of the larger box is a block having three or more
projections on its upper face, and on the lower side of the smaller box are downward
projections, shorter than the box so as to allow the block to slide endways so that
in one extreme position the projections on the box will correspond and rest on the.
projections on the block so that as the box descends the slide is forced down,
effecting the stroke; but if the block is moved to the other extreme position then
the projections on the box correspond and pass between the spaces in the block
allowing the box to descend without operating the slide. This block I cause to
travel either by springs, cams, screw or link motions operated either by hand or.
treadle. In order to secure the projections on the block getting well under
the projections on the box before the descent of the latter I may so step the
projections to correspond with each other so that as the box was rising the
projections on the block would pass under the projections on the box to the extent
of the steps formed thereon; or in other words the block would have travelled
partly under the box before the lattér had reached the top of its stroke leaving.
only a small amount of the travel to be effected as the eccentric turned its
top centre.
+:
The means of adjusting the slide consists of the usual packing plates, inserted
within the small box, containing the eccentric block or between the base of the..
larger box and the slide. In order to admit plate of any thickness I use an
adjusting screw at the top of the slide.
a 1000
DANIEL SMITH, JUNR.,
Applicant.
COMPLETE SPECIFICATION.
Improvements in Press Stop Motions and Means for Adjusting.
Press-slides, applicable to all kinds of Cutting-out, Pressing,
Rivetting, Shearing, and Forging Machinery.
DANIEL SMITH Junior Castle Iron Works Raglan Street Wolverhampton
Staffordshire 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 object of this invention is the construction of a press slide containing a stop
motion or means for causing or arresting the descending motion of the slide by a
mechanism (hereafter to be described) worked by hand or foot power in combination if
FD31

page_text: desired with means for effecting a vertical adjustment in the position of the slide in
relation to the crank or eccentric, giving motion thereto as may be required to suit
tools of variable length and so dispense with packing under the lower tool bed or washer
on the shank of the upper tool. The chief advantages and improvements in the
proposed stop motion consists in its simplicity or fewness of parts; the solidity,
large area and great strength of such parts under pressure as when cutting,
pressing etc.; the facility by which the stop motion can be engaged or disengaged
on account of the short travel of the part essential for thic stopping and starting of
the press slide; and the means used to give motion to the sliding block for the
purpose of stopping or starting the press slide; also the combination of the stop
motion with means used for adjusting the vertical height or position of the press
slide in relation to the crank or eccentric giving motion thereto.
I will first describe the stop motion. This consists of a box (preferably
rectangular in shape) caused to slide vertically within another box that can also
move vertically if desired within the slide. Within a recess beneath the smaller
box but resting on the lower inside face of the larger box is a block having two,
three, or more projections on its upper face, and on the lower outside face of the
smaller box are downward projections. The block being to the extent of the width
of one projection shorter than the width of the larger box so that, when the sliding
block (hereafter called block) is at one extremity of its travel or horizontal
movement the projections on the block correspond with or come under those on
the lower face of the smaller box so that as the latter is caused to move vertically
the surrounding slide is caused to move also; but when the block is moved to the
opposite extremity of its travel then the projections on the smaller box as the
latter descends pass into the spaces formed by the projections on the block and in
this case the motion of the smaller box is not imparted to the slide which remains
at rest.
This explanation will be better understood by reference to the accompanying
"drawings of which
Fig. 1. is the front elevation of a general cutting-out or punching press showing the
application of the stop motion thereto. The front cover of the slide B not being
shown for the convenience of illustrating the interior of the slide.
Fig. 2. is a side elevation of Fig. 1.
The same letters of reference occurring on two or more views denote corre-
sponding parts.
I will now describe the peculiarities in the construction of the smaller box 1
and the block C. These are shown in perspective by Figs. 3 and 4. On the
block C Fig. 4 are projections 1, 2, and 3 and on the box I Fig. 3 are similar
projections creating spaces 4, 5, and 6. The height of these projections are about
equal to but not less than the stroke of the eccentric H. The thickness of the pro-
jections 1, 2, and 3 on the block C are slightly less than the width of the spacess 4, 5,
and 6 within the box I as also are the projections on the box I somewhat less
in thickness than the spaces formed within the block C, so that as the box I
descends the projections thereon freely pass into the spaces formed within the block C.
The projections on the block C and likewise those on the box I could extend simply
straight across but by giving them the V shape as shown, the sectional area of the
projections are considerably increased, thereby making them stronger to resist the
compressive strains, and further in the case of a long stroke or travel of the slide
the projections would stand up high and therefore be more liable to be crushed or
bent over.
In this case the effect of the V shape widens the base of each
projection, making it stronger and is therefore of great value. The projections
might be other than V shape viz. a curve or double V would be as efficacious in
giving increased strength to the projections, and moreover the stronger the pro-
jections can be made by their departure from the straight line the thinner or
narrower they will suffice to be, and narrowness of the projections is desirable
because it reduces the horizontal distance the block C will have to travel to engage
or disengage it from the box I which is important in the case of high speed or

page_text: on
quick stroke presses and in such cases I prefer to step the top of the pro-
jections 1, 2, and 3 as shown at m. m. m in Fig. 4, and in a corresponding manner
those at K. K. K on the box Fig. 3.
The object of these minor steps is for
the purpose of allowing the projections on the block C to partly slide under those
I before it has reached the top of its stroke thereby leaving a less
distance for the block C to travel just at the instant of rest that occurs before
the box commences to descend or while the eccentric or crank H is passing its
top centre. In machines where the pressure is very great necessitating wide
projections and consequently a long travel of the block C this modification of
stepped projections is of great value. The projections may be formed in the
direction of the length of the block C, in this case the horizontal motion of the
block C would be at right angles to that shown, and the block C preferably made
the full length of the outside width of the box I or they may be formed so as to
radiate from a centre as shown in Fig. 6. The handle O serving to push or swing
the block C with its projections under those on the box I' as shown. I will now
describe the application of these improvements previously set forth to a cutting or
punching press. In Fig. 1. H is the eccentric that on rotation gives vertical
motion to the smaller box I within the larger box J. C is the block having
upward projections 1, 2, and 3. These easily pass into the spaces 4, 5, and 6 of
the smaller box I as it descends with the block C in the position as shown in
Fig. 1. and the slide B remains stationary; but when it is desired to cause the
slide to descend pressure is put upon the treadle T. such pressure is transmitted
through the rod r. and the lever 7 keyed on the spindle S, passing through the
bracket S2, the lever and the connecting link V and thereby the block C is
drawn or caused to travel to the right. In this position the projections 1, 2, and 3
on the block C will be under the corresponding and similar projections on the
smaller box I, and the vertical motion of the latter will be imparted to the slide B
causing it to descend and cut out or otherwise operate on the metal between the
tools (not shown) as may be in the press. As the foot or pressure is removed from
the treadle T, the spring M being under tension will pull up the treadle T and
push the block C back into its original position as shown in Fig. 1. and allow the
small box to continually work up and down within the large box J without
giving motion to the slide B. As the slide B or the box J reciprocates vertically
there will be a tendency for their motion on account of the block C being connected
to the lever to lift the block C from the lower face of the box J and so cause
the projections of the block C to catch those of the box I. This I prevent at the
one end of the block C by the peg X firmly screwed or otherwise secured into
the box J and extending inwards fitting into a hole formed within the extremity of
the block C and in a similar mauner at the other end by the peg d that is secured
into the block C and passes just freely through the side of the box J and connected
by a jaw to the link V having its other end connected to the lever 12 as previously
described. By placing a suitable catch over the treadle T Figs. 1 and 2 the
treadle T. may be held down thereby keeping the block C with its projections
under those on the box I causing the slide B to work or slide vertically
continuously, and at any time it may be desired to cause the slide to rest or stop
then by pushing the treadle T sideways from under the catch the spring M
would come into operation and withdraw the block C causing the slide to stop
working.
In the modification of the radial block shown by Fig. 6. I may connect the
handle O in a similar manner to the lever in order to work same by hand or
foot motion. There are a number of ways of causing the block C in Figs. 1. and 4
or the one shown in Fig. 6. to slide. One is shown by Fig. 5. This being a plan
of the block C and section through the boxes I and J, also the slide B at a point
denoted by the broken line X' and X2 in Fig. 1. the block C having a rack formed
preferably on the front side in which gears a quadrant caused to turn on the
pin P by the lever Z. The pin P being secured to a part projecting from the
box J as shown or in case this is not used from the slide B. This modification

page_text: is also a convenient means applicable to the radial block shown in Fig. 6. A quick-
threaded screw or a cam or lever connected with springs could be used for moving
the block C.
I will now describe the means of giving vertical adjustment to the slide in
combination with the stop motion previously described. In Fig. 1. the bolts 7, 8,
and 9 are screwed up (and by reason of the taper in the nip piece R) until the
friction is just sufficient to allow the slide B to fall by its own weight and by
screwing up the lever I sufficient friction is applied to the slide to prevent it from
falling or following the box I as it descends or in other words the slide B is by the
friction lever L retained at the top of its stroke. When it is desired to alter the
vertical height of the slide B to suit any variation in the height of the tools
the screw W is slightly unscrewed, the plates F are relieved from the weight of
the slide B. One or as many of the plates F as may be necessary are removed.
The lever L is now loosened and the slide B descends without the interior boxes
(assuming of course that the shaft H. is not rotating) and creates a space between
the bottom of the box J and the base of the slide B, iuto this space are inserted
the plate or plates F previously removed from off the top of the box J, the
screw W is again screwed up making the plates tight thereby adjusting the slide
into a lower position equal in amount to the thickness of the plate or plates
transferred. To raise the slide these operations are repeated and the plates from
the bottom are again transferred on to the top of the box J.
Another way
of effecting the slide adjustment is to dispense with the box J and
make the interior of the box I larger and insert packing plates between the block n
and the box I either above or below the block n as the slide B is to be raised or
lowered. In case this is not done and the box J dispensed with then the slide
becomes non-adjustable as regards its vertical height in relation to the crank or
eccentric. I have referred to horizontal movement of the block C also vertical
movements of the slide B, this is because the machine illustrated in Figs. 1 and 2
is vertical. .
Of course these improvements are applicable to a press or machine working in
any other position.
I have shown the application of this improved stop motion to a press having its
eccentric working within the box I but it is equally as applicable to crank presses
having the motion imparted to the slide by a connecting rod from a crank usually
rotating above the slide. Fig. 7 shows this arrangement partly in section through
the line C. D. on plan Fig. 8. (but the parts 10, 11, C and levers not being in
section) in which B1 is the slide, 16 is its cover, 10 is the connecting rod extending
upwards to the crank not shown. On the lower end of the connecting rod 10 there
is a block 11 hinged thereto. On the lower face of the block 11 are similar pro-
jections to those previously described and those described and shown on the box I
Figs. 1 or 3. On the lower face of the interior of the slide B1 is a block (1
having projections similar to those previously described and those described and
shown on the block C Figs. 14 or 5. The slide B 1 is retained at the top of its
travel by the friction between it and its guides not shown the block or jaw part 11
is caused to move up and down within the slide B1 by the crank not shown. The
projectious on the block 11 meshing into the spaces formed by the projections on
the block C then by pushing up by a spring or weight not shown the lever 12
which is fulcrumed on the slide B1 the block C¹ will be drawn or caused to slide
so that its projections will come under those on the block 11 thereby causing the
slide B1 to reciprocate or make a stroke after which as the slide ascends the
lever 12 catches against the lever 13 and the up stroke of the slide through
the levers 12 and 14 pulls the block C' into the position as shown allowing the slide
to remain at the top of its stroke while the block 11 continues to work up and down
within the interior of the slide B 1. By arranging a suitable spring previously
referred to to pull or force the block C' to the right and by a suitable treadle gear
so arranged as to push up at the rod 17, the lever 13 Fig. 7 which has its fulcrum 15
fixed on the body or frame of the press is caused to slide off the extremity of the

page_text: lever 12, as soon as the block 11 arrives at its highest point within the slide B 1
the spring previously referred to pulls the block to the right thereby causing
the slide to make another stroke.
In case it is desirable to move the block C' by hand, a handle could be passed
through the front of the slide B 1 into the block C at its left hand extremity or
front of the slide. If it is desired to adjust the slide vertically in relation to its
distance from the crank I prefer to effect such adjustment by a screw arrangement
in the connecting rod as usual.
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 -
1. The construction of a sliding block partly shown at C Fig. 1. having
projections 1, 2, and 3 or more extending straight (that is not V shaped) across
such block as herein described and also the construction of the box I Fig. 1. having
projections similar to 1, 2, and 3 on block C and forming spaces 4, 5, and 6
extending straight (that is not V shaped) across the lower face of such box as
herein described and partly shown for the purposes herein set forth.
2. The construction of a sliding block C and box I having their projections 1, 2,
and 3 or more and spaces 4, 5, and 6 or more V shaped as shown by Figs. 3, 4,
and 5 or otherwise as herein described or any colourable imitation thereof for the
purpose herein set forth but without the minor steps m. m. m. formed in the
projections 1, 2, and 3 on the slide C, and the minor steps K. K. K formed in
the projections on the box I as herein described and for the purposes set forth.
3. The sliding block C Fig. 4 and the box I Fig. 3 having in their projections
or in any other shaped projections the minor steps as shown at m. m. m in the
block C and those at K. K. K in the box I for the purpose of facilitating the quick
passage of the block C under the box I to cause the slide B to descend as herein
described.
4. The combination of the box J and the plates. F Fig. 1. with the box I and the
block C constructed as herein described and shown for the purpose of making the
slide B vertically adjustable.
5. The pegs and d Fig. 1. or their equivalent used for the purpose of guiding
and retaining the block C on the lower inside face of the box J or on the lower
inside face of the slide B when the box J is not used as herein described.
6. The link V Figs. 1 and 2 used for the purpose of connecting the block C with
the lever allowing a free vertical motion to the block C as herein described and
shown.
7. The box I and the block C constructed as herein described in combination
with the slide B for the purpose of stopping or arresting the motion of the slide as
herein described i.e. without the box J being used.
8. The modification partly shown by plan Fig. 5 consisting of a rack formed on
the side of the block and the projection on the box J for carrying the pin P
and toothed lever Z gearing into the block C as herein described and shown for
moving the block C so as to cause the box I to impart its vertical motion to the
slide B also the projection b when formed on the slide B when the box J is not
used.
9. The modification partly shown by plan Fig. 6 of a block C³ made to swing on
the pin by the handle O or suitable foot gear connected thereto, such block
having radial projections as shown by Fig. 6 or projections similar to those shown
in Figs. 3, 4 and 5 or as otherwise herein described.
10. The construction of the block C and the box I have two projections on cach
either transverse or longitudinal so shaped as to be capable of meshing into each
other as herein referred to.
11. The modification partly shown by Fig. 7 and 8 of the blocks 11 C' and B1
as applied to crank presses that impart motion to the slide 11 through the
connecting rod 10 as herein described and shown for the purpose set forth.

page_text: 12. The levers 12 and 14 Fig. 7 for the purpose of withdrawing or causing the
"block C¹ to slide as it catches or strikes the lever 13 during the upward stroke of
-the Bas herein described.
13. The combination of the block C₁ with the levers 14, 12, 13 and the spring
not shown used for the purpose of pulling or pushing the block C' to the right as
"herein described.
14. All improvements as claimed in Claims No. 1 to 13 inclusive as herein
described and shown having reference to the accompanying drawings as applied to
such machines as mentioned in the title.
Dated this 12th day of October 1892.
DANIEL SMITH, JUNIOR.