Improvements in Machinery or Apparatus for Inserting Screws into Leather or other Material.
Year: 1893

page_text: Date of Application, 8th Aug., 1893
Complete. Specification Left, 3rd May, 1894-Accepted, 25th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Inserting Screws into
Leather or other Material.
We, MATHÄUS WIEDERIN, Embroiderer, and FRIEDRICH MAERKY, Colorist,
both of Frastanz, Vorarlberg, do hereby declare the nature of this invention to be
as follows:-
This invention relates to machinery or apparatus for inserting headed screws into
leather wood or similar material, the object being chiefly to facilitate the employ-
ment of screws for fixing the soles of boots and shoes, as a substitute for the pegs
of wood or iron now used for this purpose.
The apparatus comprises an adjustable receptacle composed of tubes and adapted
to receive screws sorted according to the size of their heads, introduced by means
of a screw-driver adapted to turn in a holding device and also capable of upward
and downward motion and fed by a feeding device which causes the screws singly
to take up their position underneath the screw-driver so that at the moment
when the holding device is released the descending screw-driver may screw them
into the material.
We will now proceed to explain the construction of the apparatus by reference,
to the accompanying illustrative drawings, in which
Fig. 1 is a front view,
Fig. 2 a sectional side elevation, and
Fig. 3 a plan of the same.
Figs. 4 to 11 are detail views hereinafter referred to.
In the example shewn the frame A of the machine supports a horizontal shaft a
which receives rotary motion through the medium of a pulley a' connected with a
fly-wheel a' and driven preferably from suitable pedal mechanism.
Upon the other end of this shaft is keyed a bevel wheel b engaged with another
bevel wheel the shaft of which is constituted by the spindle B' of the screw-
driver B. This spindle B' is mounted in bearings 6 provided on the frame A and
extends through the bevel wheel 6' with which it has a feather and groove or other
suitable connection so that it is capable of a certain amount of longitudinal or
upward and downward movement in addition to its rotary motion.
The
The upward and downward movement is imparted to it by means of a double-
armed lever C pivoted at c to the frame A, and one arm of which embraces the
sleeve 3 adjustable upon the spindle B', while its other arm from which a weight C¹
is suspended rests upon a cam D through the medium of a pin c³ arranged on one
side of the worm-wheel E and turning with this worm-wheel upon its shaft e.
worm-wheel E is set in motion by means of a worm E' arranged upon the shaft a.
Upon the bed-plate or table F carrying the support A is firmly secured, by the
side of such support, a standard G which passes through the stationary annular
plate 9 and carries a circular series of vertical tubes supported between two
rotary discs g' (the said tubes and discs being hereinafter collectively referred to
as the drum) such tubes being of equal length but of different diameters (which is
determined according to the size of the heads of the screws), the lower of the two
discs g being supported by the ring-plate g. In this plate at the same distance
from the upright at which are arranged the axes of the pipes f, a perforation f
(Figs. 7 and 8) is provided so that as the tubular drum completes one revolution
the tubes pass each in succession over the said perforation f¹. A spring controlled
pin (Figs. 1, 2 and 9) which springs into corresponding recesses in the lower
disc g¹ ensures the proper position at each stroke. Below the aperture f, there is

page_text: arranged a stationary tube f³ (Figs. 1, 2, 4, 6 and 7) which forms the extension
of each of the tubes f as they take up their position over the said aperture. This
tube extends down to the bed-plate or table and terminates in close proximity
to a receptacle or carrier h (Figs. 4 and 5) provided at the end of an oscillating
lever H guided by a horizontal bent piece or arm h'. This carrier consists of a
sleeve the bore of which is somewhat wider than the diameter of the largest screw
head and which slides with its lower opening upon the arm /¹.
The lever H is secured on the spindle h the upper end of which carries a small
toothed-wheel which engages with the toothed-segment I turning about 2 and to
which a flat spring j is secured, so as to be acted upon by a cam J secured to the
worm-wheel E. A spiral spring h³ passed upon the spindle h' and retained in
position at both ends serves to impart rotary motion to the segment I in one
direction with increased speed as soon as the cam J which acts upon the flat
spring and upon the said segment (which it turns in the opposite direction),
releases the flat spring.
To the tube underneath the annular plate 9 are secured two yielding rotary
cheeks kk (Figs. 4 to 7) carrying pins ¹¹, which normally project, through
lateral perforations provided in the wall of the said tube f, into the interior
thereof, but which recede and open a free passage when, through the oscillation of
the lever H-from the screw-driver towards the tubular drum, the wedge plate l,
whi h is secured to it, causes the cheeks k k to move away from each other.
the lever H moves in the opposite direction, the terminal pieces k³ ³ of the said
cheeks kk, pivoted like pawls, and capable of turning in that direction only
afford a free passage for the wedge-plate so that the cheeks are not thereby
caused to move apart.
As
In the direction of the axis of the screw driver B and in the plane of the
guiding arm extending to that part, cheeks m m, (Fig. 1) are arranged to form
tongs or grippers in connection with two levers M M pivoted at m² m² to a rod or
rail held in position by a spring . To the lower ends of these levers are
secured the cheeks m m, while the upper ends thereof carry projections m³ m², the
inclined ends of which, facing each other, are arranged to be acted upon by a
bevel wheel n capable of turning and moving together with the spindle B', so that
the cheeks m m of the tongs which the springs n' n' secured to the rail tend to
keep open, are closed when the screw driver rises. A curved toothed or serrated
piece o, secured to the front end of the bed plate' or table next to the screw
driver B serves for securely holding the work.
The operation of the machine is as follows:-
After the screws have been sorted according to the size of their heads, and
arranged with their heads upwards in the proper order in the several tubes of
the drum, the drum is turned until the tube containing the sort of screws to be
driven in first comes over the aperture of the annular plate d, and is secured in
such position by the pin f' (Fig. 9). A slide which retains the screw in the tube
and prevents it from dropping out at the lower end of it before the proper
time, is then withdrawn and the screws in succession fall through the aperture f
into the tubular piece f where the lowermost screw meets the projecting pins k¹ k¹
of the holding device and is by them retained in position. The machine is after
this set in operation, the shaft a receiving motion through the medium of the
pulley a² as stated. The screw driver B receives motion at the same time and its
speed may be controlled or changed as required by correspondingly determining
the number of revolutions of the driving gear. Through the medium of the worm
wheel and worm E E¹ the cams D and Jare simultaneously set in motion. The
cam D acts on the contact roller c and slowly raises the weighted arm of the
lever C carrying said roller. By this means the slow descent of the other arm and
of the screw driver B secured to it (or in other words of the spindle B' of the
screw driver) is effected. When the roller passes over one of the two points of
the cam, the spindle B' rapidly rises under the action of the weight c'. The cam J
as it revolves acts upon the curved rack or segment I, through the flat spring j
·

page_text: sliding upon it, by which rack the small wheel is set in motion, so that the
lever H is caused to turn slowly on its pivot, from its normal position (in which
the carrier is situated under the tube f³, Figs. 4 and 6) towards the cheeks m m.
As soon as the flat spring; slides off the cam J the spiral spring h³ which in the
meantime has been placed in tension is relieved from such tension and causes the
lever H to spring back, by a very sharp movement. The wedge plate / secured to
the carrier h at this moment forces apart the cheeks kk of the holding device anl
thereby causes the pins k¹ k¹ to recede for a moment so as to release the lowermost
screw resting upon them. This screw is therefore allowed to drop into the carrier h
(Fig. 4) and to bear with its lower end upon the curved arm h¹; and the pins k¹ k¹
are simultaneously advanced into the tube f again so as to hold back the next
screw. When the lever H is again slowly oscillated towards the screw driver in
the manner stated it conducts the screw contained in the carrier h along the guide
arm h', over the opening situated between the cheeks m m (Fig. 10), into which
the screw drops from the carrier h.
As the carrier & returns to its normal position the screw driver B, which has in
the meantime moved down performing a rotary movement at the same time,
engages the screw (by introducing its edge into the cut or slit in the screw head)
and screws it into the material placed against the toothed piece o. As the screwing
proceeds the cheeks m m open and thereby afford the necessary space for the screw
driver (Fig. 11) and the projections or pins m³ m² are gradually pressed by the
springs n' n' against the bevel wheel n as the screw driver descends.
As the lever H, into the receptacle h of which the next following screw has
dropped, slowly turns towards the cheeks m, m, after passing under the pawl
ends of the holding device, the screw driver rapidly rises, with the result that
the cheeks m m are closed under the action of the pawl n rising along with the
spindle B, so that the said cheeks are ready for the reception of the screw next
conveyed to them.
Thus, at each half revolution of the worm wheel E one screw is driven home into
the material.
Improvements in Machinery or Apparatus for Inserting Screws into
Leather or other Material.
We, MATHÄUS WIEDERIN, Embroiderer, and FRIEDRICH MAERKY, Colorist,
both of Frastanz, Vorarlberg, 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 machinery or apparatus for inserting headed screws
into leather wood or similar material, the object being chiefly to facilitate the
employment of screws for fixing the soles of boots and shoes, as a substitute for the
pegs of wood or iron now used for this purpose.
The apparatus comprises an adjustable receptacle composed of tubes and
adapted to receive screws sorted according to the size of their heads, a screw-driver
adapted to turn between the cheeks of a holding device and also capable of
upward and downward motion, and a feeding device which causes the screws singly
to take up their position underneath the screw-driver so that at the moment when
the holding device is released the descending screw-driver may screw them into
the material.
..

page_text: which,
Cue mustiative wigs med with our visional Specifica
Fig. 1 is a front view,
Fig. 9a sectional side elevation, and
Fig. 3 a plan of the same.
Figs. 4 to 11 are detail views hereinafter referred to.
In the example shewn the frame A of the machine supports a horizontal
shaft a which receives rotary motion through the medium of a pulley a³ connected
with a fly-wheel a¹ and driven preferably from suitable pedal mechanism. Upon
the other end of this shaft is keyed a bevel wheel b gearing with another bevel
wheel b¹ the shaft of which is constituted by the spindle B' of the screw-driver B.
This spindle B' is mounted in bearings 6 provided on the frame A and extends
...through the bevel wheel 61 with which it has a feather and groove or other
suitable connection so that it is capable of a certain amount of longitudinal or
upward and downward movement in addition to its rotary motion.
The upward and downward movement is imparted to it by means of a double-
armed lever C pivoted at c to the frame A, and one arm of which embraces a
sleeve adjustable upon the spindle B¹, while its other arm, from which_a
weight is suspended, rests through the medium of a pin upon a cam D,
arranged on one side of the worm-wheel E and turning with this worm-wheel
upon its shaft e.
The worm-wheel E is set in motion by means of a worm E¹
fixed upon the shaft a. Upon the bed-plate or table F carrying the support A,
is firmly secured, by the side of such support, a standard or post G which passes
through a stationary annular plate g and carries a circular series of vertical tubes f
supported between two rotary discs g¹. These tubes and discs are hereinafter
collectively referred to as the tubular drum. The tubes are of equal length but
of different diameters determined according to the size of the heads of the screws
to be used, and the lower of the two discs g¹ is supported by the annular plate g.
In this plate there is provided at the same distance from the post G as the axes
of the tubes, an aperture f¹ (Figs. 7 and 8) so that as the drum completes one
revolution, the tubes pass in succession over the said aperture f'. A spring
controlled pin (Figs. 1, 2 and 9), which springs into corresponding recesses in
the lower disc g', ensures the proper position of the tubular drum at the end of
each adjustment thereof. Below the aperture f', there is arranged a stationary
tube (Figs. 1, 2, 4, 6 and 7) which forms an extension of each of the tubes f
as the same takes up its position over the said aperture. This tube f³ extends
down through the bed-plate or table and terminates in close proximity to a
receptacle or carrier h (Figs. 4 and 5) provided at the end of an oscillating lever H
which is guided by a horizontal bent piece or arm h. The carrier consists of a
sleeve the bore of which is somewhat larger than the diameter of the largest
screw-head to be used in the machine, the said sleeve being arranged to slide with
its lower open end upon the arm h¹.
The lever H is secured on a spindle * the upper end of which carries a small
toothed-wheel which engages with a toothed segment I turning about a stud
and to which is secured a flat spring j, so as to be acted upon by a cam J secured
to the worm-wheel E. A coiled spring passed over the spindle and suitably
retained in position at both ends, serves to impart rotary motion to the segment I
in one direction with increased speed as soon as the cam J releases the spring j
after having previously turned the said segment in the opposite direction.
To the tube and underneath the annular plate g are pivoted two yielding
cheeks or levers kk (Figs. 4 to 7) carrying pins k¹ k¹, which normally project,
through lateral perforations provided in the wall of the said tube f, into the
interior thereof, but which recede and open a free passage when, through the
oscillation of the lever H from the screw-driver towards the tubular drum, a wedge
plate 1, which is secured to it, causes the cheeks or levers kk to move away from
each other. As the lever H moves in the opposite direction, the terminal

page_text: pieces of the said cheeks or levers k k which are pivoted like pawls, and are
capable of turning only in that direction in which the lever H is returning, afford
a free passage for the wedge-plate / so that the cheeks are not thereby then caused
to move apart.
f
In the direction of the axis of the screw driver B and in the plane of the
guiding arm extending to that part, cheeks or jaws m m, (Fig. 1) are arranged
to form a gripper or holding device in connection with two levers M M pivoted
at m' m' to a rod or rail held in position by a spring . To the lower ends of
these levers are secured the said cheeks or levers m m, while the upper ends
thereof carry projections m² m², the inclined ends of which, facing each other, are
arranged to be acted upon by a bevel wheel or frustum of a cone n capable of
turning and reciprocating with the spindle B', so that the cheeks or levers m m
of the holding device, which the springs n' n¹ secured to the rail tend to keep
open, are closed when the screw driver rises. A curved toothed or serrated
piece o, secured to the front end of the bed plate or table next to the screw
driver B, serves for securely holding the work.
The operation of the machine is as follows:-
:
'
After the screws have been sorted according to the size of their heads, and
arranged with their heads upwards in the proper order in the several tubes of
the drum, the drum is turned until the tube ƒ containing the sort of screws to be
driven in, first comes over the aperture of the annular plate d, and is then
secured in such position by the pin f' (Fig. 9). A slide (shown in Fig. 1 at the
extreme right hand side tube f,) which retains the screw in the tube f and prevents
the same from dropping out at the lower end of the tube before the proper time,
is then withdrawn and the screws allowed to fall in succession through the
aperture into the tubular piece where the lowermost screw meets the
projecting pins k₁ of the holding device and be thereby retained in position.
The machine is afterwards set in operation, the shaft a receiving motion through
the medium of the pulley a³ as stated. The screw driver B is thereby caused to
rotate at a speed that can be varied as required by correspondingly varying the
number of revolutions of the driving gear. Through the medium of the worm
wheel and worm E E¹, the cams D and J are simultaneously set in motion. The
cam D acts on the pin 2 or on an anti-friction roller fitted thereon, and slowly
raises the weighted arm of the lever C carrying said pin or pin and roller. By
this means the slow descent, of the other arm, and of the spindle B' with screw
driver B secured to it, is effected. When the pin or roller c passes over one of
the two points of the cam, the spindle B¹ rapidly rises under the action of the
weight c. The cam J as it revolves, acts upon the curved rack or segment I
through the flat spring; sliding upon it, by which rack the small wheel i is set in
motion, so that the lever H is caused to turn slowly on its pivot, from its normal
position (in which the carrier h is situated under the tube f, Figs. 4 and 6)
towards the checks or jaws m m. As soon as the flat spring; slides off the cam J,
the spiral spring ³, which in the meantime has been placed in tension, is released
and causes the lever H to spring back very quickly. The wedge plate secured
to the carrier h at this moment forces apart the cheeks or levers k k of the
retaining device and thereby causes the pins k¹ k¹ to recede for a moment so as to
release the lowermost screw resting upon them. This screw is therefore allowed
to drop into the carrier h (Fig. 4) and to bear with its lower end upon the curved
arm h', and the pins are simultaneously advanced into the tube f* again so
as to hold back the next screw. When the lever H is again slowly oscillated
towards the screw driver in the manner hereinbefore stated, it conducts the screw
contained in the carrier h along the guide arm to a position over the opening
situated between the cheeks or jaws m m (Fig. 10), into which the screw then
drops from the carrier h.
As the carrier h returns to its normal position, the screw driver B, which has in
the meantime moved downwards performing a rotary movement at the same time,
engages the screw (by introducing its edge into the cut or slit in the screw head)

page_text: and screws it into the material placed against the toothed piece o. As the screwing
proceeds and the conical wheel or frustum n descends, the cheeks or jaws m m are
opened by the action of the springs n', on the levers M, so as to thereby afford the
necessary space for the screw driver B, (Fig. 11).
As the lever H, into the receptacle h of which the next following screw has
dropped, slowly turns towards the cheeks or jaws m, m, after passing under the
pawl ends k² ² of the retaining device, the screw driver rapidly rises, with the
result that the checks m m are closed under the action of the conical wheel or
frustumn rising along with the spindle B, so that the said cheeks or jaws are
ready for the reception of the screw next conveyed to them.
Thus, at each half revolution of the worm wheel E, one screw is driven home into
the material.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
1. For inserting screws into leather or other material, a machine provided with a
screw driver B capable both of rotary and of upward and downward motion and
under which screws contained in a number of parallel tubes of connected together in
an adjustable frame, are placed by means of an oscillating carrier which is
arranged to travel over a curved supporting pipe and is adapted to receive a
screw from one of said tubes and transfer it to the cheeks or jaws m of a holding
device located between the screw driver and the work, and adapted to hold
the screw up to the moment of its insertion in the latter, substantially as herein
described
2. In a machine of the kind referred to in the preceding claim, mechanism for
reciprocating the screw-driver B comprising a cam D driven by means of worm-
gear E E' from the shaft or spindle a which rotates the spindle B of the screw-
driver and a lever C operated by the said cam and having one of its arms weighted
and the other connected to the said spindle B, the arrangement being such that
the screw-driver B will be caused during its rotation to descend slowly towards the
screw to be inserted, and afterwards to rapidly rise substantially as described.
3. In a machine of the kind referred to in Claim 1 the device for feeding screws
from the tubular drum and bringing them under the screw-driver comprising a
cam J arranged to be rotated through worm gear E, E' from the shaft a, an
oscillating toothed sector I provided with a leaf spring; adapted to be operated by
the said cam, and a lever H operated from the said sector and provided with a
carrier and with a coiled spring h³, the arrangement being such that whilst the
spring bears against the cam J, a slow motion will be imparted to the lever H
and carrier in a direction to carrying a screw from the drum to the screw driver,
and that when the leaf-spring j ceases to bear against the said cam J the arm H
with carrier will be moved back rapidly under the action of said spring substantially
as herein set forth.
4. In a machine of the kind referred to in Claim 1 a retaining device for screws
which have to be fed to the oscillating carrier h, comprising yielding cheeks or
levers kk provided with pins k³ k₁ that are caused by the said cheeks or levers to
laterally enter a tube f³ over which the tube containing the screws to be fed is
brought, and with pivoted pawl-like terminal pieces, the arrangement being
such that when the lever H with carrier his swung back towards the tubular drum,
the said cheeks or levers will be forced away from each other by means of a wedge-
plate secured to the said carrier for a sufficient time to enable the lowermost of
the screws that have entered the said tube f' and which until then will have been
retained by the pins k¹, k¹, to drop into the carrier and on the movement of the
carrier towards the screw driver, the terminal pieces will permit the said plate
and carrier to pass without operating the said cheeks or levers to open substantially
as herein described.
5. In a machine of the kind referred to in Claim 1, a holding device the jawa m m

page_text: of which are pivoted to levers M M arranged to be acted upon in one direction by
a bevel wheel or frustum of a cone secured to the spindle B of the screw driver B
and in the opposite direction by springs n' n¹, the said jaws being so arranged as to
clamp or hold the screw falling from the carrier h of the feeding-mechanism until
during the descent of the screw-driver and the insertion of the screw into the
material, the levers m m are sufficiently released by the said bevel wheel or
frustumn and moved apart by the springs n', n' substantially as herein
described.
6. The combination and arrangement of parts constituting the improved machine
or apparatus for inserting screws into leather and other material substantially as
herein before described with reference to and shown in the drawings.
Dated this 3rd day of May 1894.
For the Applicants,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent..