Improvements in Machinery for Dressing or otherwise Preparing Hides, Skins, and Leather.
Year: 1889

page_text: Date of Application, 10th July, 1889
Complete Specification. Left, 10th Apr., 1890-Accepted, 10th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Dressing or otherwise Preparing
Hides, Skins, and Leather.
11
I, JOSEPH HALL of Burley Engine Works Leeds in the County of York Engineer,
do hereby declare the nature of this invention to be as follows:-
These improvements refer to the construction of machines used in the manufacture
of leather and tend to produce more and better work in the same time and at greater
convenience to the attendant.
For the purpose of moving the tools onto and off the work in the case where one or
more tools are arranged on each side of a pivotted toolholder and have to be lifted off
alternately I employ a cam or eccentric on the crank pin or disc plate to which is
jointed the connecting rod for reciprocating the toolholder head or slide.
Or I adapt one of the stop rods on the tool head to he rocked sideways by a
lever connection to a side cam on the crank pin. The stop rod or its connection may
be rigid or yielding.
Or I use the eccentric on the crank pin with a rigid connecting rod in combination
with stop motions working on the principle of those described in my patent specifica-
tions Nos. 522 of 1888, 2262 of 1883, and 5619 of 1886.
For the purpose of lifting one or other of the tools off the work while the machine
is in motion and thus being able to increase the working speed I employ for each
tool or set of tools a rod or slide which passes through a deep slot or between
equivalent parts on the stop rods. To this slide are connected bell crank levers which
are jointed to the framing said levers being connected by a rod or handle passing
along the side of the machine and if desired all round, so that the attendant may be
able to take off and put on either tool or both tools from either side or any part of
the machine where he may happen to stand.
Or I pass a lever having its fulcrum at one end on the framing through the slot
in the stop rod and joint thereto a pendant rod with bandle. When this rod is raised
while the tool and its stop rod is in its highest position the lever will hold the stop
and tool up and the handle is then secured. Or the lever may be raised and lowered
by screw tooth rack or other gear acting either horizontally or vertically.
In another form I employ one or more rotatable shafts with wheel eccentric, cam, or
screw gear for working an ordinary or other stop and so that the attendant can
actuate the shaft from either side of the machine. Or I use for each tool a flat or
other eccentrically mounted bar which by lever handle or other gear can be turned
on its side or on its edge to lift or lower the stop and thereby the tool.
Sometimes I employ a slide with suitably formed slot and which by suitable gear
can be slided across the head of the machine from either side by the attendant the
interior parts of the slot thereby coming in contact with a connection from the stop
and raising it from or allowing it to drop upon the work and this on either sile at
pleasure.
Also suitable mechanism for harmonizing the lift of tool as in Figure 9 Sheet 7 of
my patent 5252 of 1888 with the diminished stroke on crank pin.
CT1000

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Dressing or otherwise Preparing
Hides, Škins, and Leather.
I, JOSEPH HALL of Burley Engine Works, Leeds, in the County of York,
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:-
These improvements refer to the construction of machines used in the manufacture
of leather and tend to produce more and better work in the same time and at greater
convenience to the attendant.
For the purpose of moving the tools on to and off the work in the case where
one or more tools are arranged on each side of a pivotted toolholder and have to be
lifted off alternately I employ a cam or eccentric on the crank pin or disc plate to
which is jointed the connecting rod for reciprocating the tool-holder head or slide.
The
Figure 1 of the accompanying drawings is a side view of such an arrangement.
Figures 2 and 3 are enlarged part side view and part plan section of same.
connecting rod Y imparts reciprocating motion to the tool-holder head Z by the
crank pin Y which is fixed in the rotating disc V. On the pin Y¹ is fixed a cam Y2
which acts against a roller Z on the connecting rod Z. The other end of the latter
being jointed to the lever R¹ of the pivoted toolholder the tools are alternately lifted
off the leather surface. The crank disc end of the connecting rod Z is slotted to
admit of the lateral motion of that rod relatively to the rod Y; the roller Zx on the
connecting rod Z may be kept in contact with the cam Y2 by means of a spring or
equivalent appliance. The connecting rods Z and Y are rigid or non-yielding, in the
example here shown.
Or I adapt one of the stop rods on the tool head to be rocked sideways by a lever
connection to a side cam on the crank pin. The stop rod or its connection may be
rigid or yielding. Figure 4 is a side view and Figures 5 and 6 plan views of the
crank disc end with such an arrangement. The connecting rod Z for lifting the
tools alternately off the leather is rocked sideways by the side cam Y' which acts
upon the roller Z*. The rod Z has its fulcrum at Zxx. Figure 7 shows another
form of side cam which may have either indents or projections as shewn in Figure 8.
Figure 7 is a plan, fig. 7B an end view at the crank end, and fig. 7° an end view at
the toolholder end of an arrangement the connecting rod Z is pivoted to and carried
in bearings on the connecting rod Y and works with a roller against a flat or groved
cam Y. The rod Z carries a lever 1 which by universal joint is connected to a lever R³
which carries the usual springs on the double toolholder as shewn on figs. 18, 19
and 20 described later on. In Figure 9 the connecting rod Z works with a roller Z*
against the cam Y' on the crank pin and is pivoted to the connecting rod Y.
Or I use an eccentric on the crank pin with a rigid connecting rod in combination
with motions working on the principle described with reference to sheet 7 in my
Patent Specification Nos. 5252 of 1888, Figures 8. 9 and 10 in my Patent Specifi-
cation No. 2262 of 1883, and Figures 1 and 2 of my Patent Specification No. 5619
of 1886. Such arrangements are illustrated at Figures 94 and 9x in which the con-
necting rod Y imparts reciprocating motion to the toolholder head Z and the
connecting rod Z from an eccentric on the crank pin causes the toolholder R* to
oscillate, the spring R³ operating to bring it into the middle position.
For the purpose of lifting one or other of the tools off the work while the machine
is in motion and thus being able to increase the working speed I employ for each
tool or set of tools a rod or slide A, Figure 10, which passes through a deep slot or
between equivalent parts on the stop rods B. The latter are bolted to the parts G
which represent the two sides of the toolholder head of any leather dressing
machine. To this slide A are connected bell crank levers C C¹, C C2, C C³, and
CC, which are pivot jointed to the framing, said levers being connected by a rod D
or handle passing along the side of the machine and if desired all around so that the

page_text: attendant may be able to take off and put on either tool or both tools from either side
or any part of the machine where he may happen to stand.
Or as shown in the plan view Figure 11 I pass a rod C having its fulcrum at one
end on the framing through the slot in the stop rod B and joint thereto a rod D with
handle. The stop rod is fixed to the toolholder of any leather setting machine.
When this rod C is moved sideways while the tool and its stop rod is in its highest
position the rod C will hold the stop rod B and tool up and the handle is then
secured.
Or as shewn in the plan view figure 114 the same purpose may be accomplished
by forming the rod C with a slot instead of the slot in the stop B. The rod C is
by a pin connected to a part of the framing of the machine. The stop B would
be on or connected to the toolholder head of any leather dressing machine. Or the
stop B may as shewn in Figure 12 be moved or reciprocated by bevel wheel and
screw gear one of the bevel wheels L sliding on a feather on a spindle F which is
rotated by a hand wheel or as shown in Figure 13 by worm and worm wheel or as
in Figure 14 by tooth rack and pinion or as shewn in figure 14 by means of an
eccentric L and in all cases acting either horizontally or vertically.
In another form I employ one or more rotatable shafts with wheel eccentric cam
or screw gear for working an ordinary or other stop and so that the attendant can
actuate the shaft from either side of the machine. Figure 15 shows an ordinary
eccentric C on a shaft C for moving the stop B which may be a flat rectangular
bar or otherwise which by buttons R on the rods R² is connected to the toolholder.
Or I use for each tool a flat or other eccentrically mounted bar C Figure 16 which
by lever handle or other gear on or connected to the spindle (" can be turned on its
side or on its edge to lift or lower the stop B and thereby the tool and toolholder
to which latter the rods R² are connected.
Sometimes I employ a sliding cam, Figure 17, with suitably formed slot and which
by suitable gear can be slided across the head of the machine from either side by the
attendant, the interior parts, or exterior when preferred, of the slot thereby coming
in contact with a button R on a bolt R2 from the tool and raising it from or allowing
it to drop upon the work, and this on either side at pleasure. The button R¹ is
attached to the toolholder. In the position shewn the tool is free to move up and
down, but, by moving the stop B and slotted slide in the direction of the arrow the
button R comes in contact with the part T and stops the upward motion of the tool
and by further moving in the same direction the button R* comes between the parts T
and T and stops the tool's motion altogether. The part T2 on the other hand first
stops the downward motion of the tool and the part T³ next stops motion altogether.
By duplicating or multiplying this arrangement any number of tools may be held
at the same time. The cam slide may be reciprocated by tooth wheel gearing into a
tooth rack I¹.
Figure 18 is a side view, figure 19 an end view, and Figure 20 plan of the tool
holder part of a machine of ordinary construction with my improvements added.
Fig. 21 is a part sectional front elevation shewing the double stop B the front of its
enclosing box being removed. The tool-holder R on the head Z rests against a
spring R³. The end of each tool-holder is by two connecting rods R2 with heads
or buttons R' attached to the sliding cam or stop B.
The two levers E E' are on weigh shafts F and F.
The shafts FF have a feather along part of their length so that as the head Z
is reciprocated in the guide G by the connecting rod Y the levers H and I may
slide on the shafts F and F¹. The levers E E¹ have double forked heads, and in the
forks work the rods K K' which serve to lift the tools off the leather as desired.
These rods are supported by brackets M¹ on the framing M. The connecting rod Y
while reciprocating the slide Z imparts rising and falling motion to a lever R³ which
is jointed thereto by a link R. The lever R³ carries the spring R³. The rod R³
being jointed to the toolholder Rx is thereby raised and lowered alternately and so
also the button or head R*. By moving the rod K which is coupled to the lever E
the tooth quadrant lever I gearing with teeth on the stop B as for instance described

page_text: with reference to figure 17 the motion of the toolholder can be controlled as desired.
Or the stop B may be of ordinary construction, or on the principle of figure 17 but
of circular form. It will thus be seen that one rod K only is needed for controlling
the toolholder R* whereas hitherto two have been required. The rod K' serves to
raise a brush S and is for this purpose, coupled to the lever E¹ which is fixed on the
same weighshaft as the lever H. This latter is by a rod H' connected to a lever H
on a weighshaft H³ on which is also fixed a lever H. This latter acts against a
cross piece H provided with a suitable incline guide and by means of rod H
connected to the brush S.
The hereinbefore described stops and means for actuating same are applicable to
machines working with rigid or yielding connecting rods Y and Z.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what 1
claim is :-
1. The application and use in leather working machines of a cam on the crank
pin for reciprocating the tool head by means of a rigid connecting rod in combination
with a roller or face on a rigid connecting rod for imparting the required rocking
motion to the toolholder substantially as set forth.
33
2. The application and use in leather working machines of the various herein
before described "stops and means for actuating same from any desired point for
the purpose of facilitating the lifting one or other of the tools off the leather while
the machine is in motion and thus being able to increase the working speed
substantially as set forth.
3. The construction of apparatus shown in the drawings.
Dated this 101 1
1000
April 1890.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.