Improvements in and relating to Tack-driving Machines.
Year: 1896

page_text: Date of Application, 22nd Dec., 1896-Accepted, 3rd Apr., 1897
[Communicated from abroad by THE GOODYEAR SHOE MACHINERY COMPANY of
Portland, Maine, in the United States of America.]
Improvements in and relating to Tack-driving Machines.
I, CHARLES JUNGE, of Lincoln Chambers, 75 Chancery Lane, London, W.C.,
Consulting 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 :-
This invention relates to improvements in mechanism which serially arranges loose
or bulk tacks in the chutes of tack driving machines.
It consists of a tack elevator wheel of peculiar construction which separates tacks
from the mass in the hopper and delivers them substantially parallel into the guide-
groove of a tack chute, which is located near to the outer circumference and parallel,
when viewed in plan, with the axis of said elevator wheel.
It also consists in arranging and operating the tack elevator wheel with reference
to the tack chute, so that the buckets of the elevator wheel serially, in turn, form one
side of the tack receiving hopper, which is usually fixed to the upper end of inclined
tack receiving cbutes.
It further consists in connecting and operating mechanism for the tack driving
mechanism.
In the drawings forming part of the specification:-
Figure 1 is a side elevation of the hopper and tack elevating mechanism in com-
bination with a hand tack driving machine, showing the relation of each to the other,
and also showing in section the mechanism which removes from the upper end of the
tack receiving chute, tacks that are not properly located therein..
Figure 2 is a plan of Figure 1.
Figure 3 is a rear elevation of Figure 1, showing the mechanism which operates
the tack elevator wheel.
Figure 4, is a front elevation of the tack hopper, showing in cross section a
portion of the tack chute.
Figure 5 is a front elevation of the tack elevator wheel, showing by dotted lines
the relation of the upper end of the tack receiving chute to said wheel.
Figure 6 is a cross section of the elevator wheel shown in Figure 5.
Figure 7 is a side elevation of the tack elevator wheel showing the side next the
tack chute and also showing the manner in which the tacks arrange themselves in
the buckets of the elevator wheel preparatory to their delivery in the tack chute.
Figure 8 is a side elevation of the upper part of the tack chute which is secured
to, or made integral with the casing, also showing by section and dotted lines the
relation of the tack hopper and casing.
The elevator wheel 1, Figs. 5, 6 and 7, is provided with elevating buckets 2, which
project a little more than the length of the longest tacks it is desired to use, from
the supporting flange 3, on the rear side of which there is formed, or attached, the
ratchet 4, which is provided with a tooth for each of the buckets 2.
The buckets 2 are formed on the outer circumference of the flange 3, and they
are shaped as shown in Fig. 5, so that each bucket will receive and hold two or more
tacks parallel with their length as shown in Fig. 7, when the elevator wheel is in
operative position in the casing 5.
When in this position, the circumferential edges of the buckets are in intimate
contact with the sides of the casing and the ends of the buckets with a rim 6, formed

page_text: at the inner end of the casing as shown by the dotted lines in Figs. 2 and 4, the
elevator wheel being introduced into the casing from the outer side as seen in
Fig. 3.
When in the cusing the buckets of the elevator wheel form boxes open only at
their inner upper edge through which openings, 8, the tacks back of the buckets
pass and are retained in said buckots regardless of the inclinations of the tack elevator
wheel until they are delivered therefrom over the tack arranging chute.
To the opposite side of the casing 5, there is attached or formed thereon the
hopper 7, in which the loose tacks to be used are placed.
From the hopper 7, the tacks pass into the interior of the elevator wheel back of
the buckets.
When tho elevator wheel is revolved in the direction of the arrow, Fig. 5, tacks
which are parallel with the openings 8, formed between the buckets of the elevator
wheel, pass through said openings and rest between the inner sides of said buckets.
and the casing 5, as shown in Figs. 5 and 7.
The tack chute 9 is located parallel, when viewed in plan, with the axis of the
tack elevator wheel and close to the side of the casing 5 as shown in Fig. 5, and
the side of the casing 5, is ent through and bevelled as shown at 10x in Fig. 5 to
allow the tacks to fall directly into the groove of the chute, when a bucket of the tack
elevator is positioned and held with reference to the incline, as shown in Fig. 5.
The tack chute 9, is preferably made in two parts, one secured to, or made integral
with the casing, and the other part 11, secured thereto as shown in Fig. 1, the tack
receiving groove being formed between the two parts.
The part 11, is made with a projecting lip 12, as shown in Figs. 1, and 2, in which
is formed a guido-way for the reciprocating slide 13.
The reciprocating slide 13 is fitted to move close to the upper surface of the tack
chute, and its under surface is provided with a groove large enough to allow the free
passage of the tack heads when they are properly positioned in the groove of the tack
chute,
To the upper part of the slide 13, on a suitable projection 14, there is pivoted the
roll 15, which the cam 16 when actuated, as hereinafter described, acts against, and
presses the slide 13, against the tension of the spring 17 and then suddenly releases it.
When from any cause the tacks delivered from the buckets of the tick elevator
wheel do not fall correctly into the groove of the tack receiving chute 9, and remain
resting thereon, as to prevent the downward flow of other tacks, they are met by the
slide to, be removed from the surface of the tack chute and fall back into the tack
hopper, from which they pass again to the interior of the tack elevator wheel to,be
again raised and dropped over the upper end of the tack chute.
To the lower end of the tack chute 9, attached to the casing and hopper, the upper
end of the tuck chute 18, attached to the tack driver is secured, as shown in Fig. 1
in any desirable manner.
The upper end of the cover 19 of the chute 18, being fitted to the groove in the
under surface of the slide 13, so that the heads of the tacks will pass free under the
cover 19.
The side of the hopper 7 is extended over the upper end of the chute 9, a little more
than the length of the longest tacks which are used, as shown by Figs. 2 and 4.
The lower part of this extension is drawn in towards and fitted close to the top
of the chute, so as to form one side of a tack receiving hopper at the upper end of
the tack chute..
As before described, the buckets of the tack elevator wheel form the other side of
this tack receiving hopper.
To insure the tacks passing substantially correct into the groove of the tack chute,
a very thin elastic diaphragm or guide plate 20, as shown in Figures 1, 2, 4, and 5
is fixed over the upper end of the tack chute, which acts to guide the tacks parallel
into the groove of the tack chute.
This diaphragm acts as a guide plate until the tacks supplied by the elevator wheel
are in excess of the quantity necessary to fill the groove of the tack chute.

page_text: When this point is reached the diaphragm yields and the tacks delivered from the
elevator wheel mass up until enough tacks are driven from the nozzle of the tack
driver to leave a space at the upper end of the tack chute.
When this occurs, the motion of the slide, 13, causes the lower tacks to fall back
into the tack hopper and the yielding of the diaphragm allows the tacks above to
follow them.
Should any tacks get positioned endwise in the openings 8 of the elevator wheel,
so that they would remain in and project beyond the circumference of the elevator
wheel and not drop out over the groove in tack chute and contact with the casing,
they would stop the revolution of the elevator wheel.
To prevent this casualty the opening 10 in the casing is extended to about
vertically over the axis or centre of the elevator wheel, so that said tacks by
gravitation will fall back into the interior of said wheel back of the buckets.
The tack elevator wheel is given active motion by the spring 21, one end of
which is attached to a projection formed on or attached to the casing 5, and the
other end to the extension 28, of the pawl 22, which is pivoted at 23 to the
swinging lever 24, Figs. 1, 2, and 3.
The lever 24, is fixed to the shaft 25, which is free to turn in bearings formed.
in the tack elevator wheel and the tack receiving hopper, and which has fixed to
the opposite end the swinging cam 16, which operates the slide 13.
When the swinging lever 24, is depressed as shown by the dotted lines of Fig. 3,
the pawl 22, will move down the space of one of the ratchet teeth of the tack elevator
wheel, and when the lever 24 is released the spring 21, will act to move the tack
elevator wheel forward so as to bring the next serial bucket in position, to deliver
whatever tacks it may hold over the tack arranging chute.
The motion of the swinging cam 16 and the slide 13, being coincident with that of
the swinging lever 24.
To prevent a retrograde movement of the tack elevator wheel a swinging retainer
pawl 26, is suitably pivoted to the casing 5, at 27, as shown in Figs. 2 and 3.,
To prevent the inertia given to the tack elevator wheel by the action of the
spring 21, from causing said wheel to move farther than the desired space, from
bucket to bucket, the pawl 22 is provided with an extension 28, to which the
spring 21, is secured.
The leverage of the extension 28 causes the face of the pawl 22 to act with
a clamping action against the face of the ratchet teeth of the tack elevator
wheel, and causes said wheel to stop at the limit of the swinging motion of the
lever 24.
In the present instance depressing the lever 24, and controlling its range of motion,
is accomplished as follows:
A pivot pin 29, is fixed under the centre of the part of the tack chute fixed to the
tack driver, as shown in Figs. 1 and 3.
Fitted to swing upon the pivot 29, is the swinging lever 30, whose upper
end 31, engages with an angular extension 32, formed upon or attached to the
swinging lever 24.
Pivoted to the opposite end of the lever 30, at 321, is the swinging lever 33, whose
free end can be swung into engagement with the tack feeding finger D.
When in this position the spring E 2 will cause the tack feeding finger D, to operate
and also cause the lever 30, to swing in unison therewith.
By the above described mechanism each reciprocation of the plunger B, of the
tack driver, causes the tack elevator wheel to move the space of one bucket, where it
is held substantially fixed until the next reciprocation of the plunger B, and the tack
or tacks arranged in and carried up by said bucket, are delivered substantially
parallel over the upper end of the tack arranging groove of the tack chute.
If the incline 32, of the lever 24, was of sufficient length to engage with the side
of the upper end 31, of the lever 30, when in the position shown by the dotted lines
of Figure 3, the action of the spring 21, would be transmitted to the lever 33, and

page_text: cause the feed finger D, and its attachments to clamp the driver of the tack driving
machine and prevent the upward rise of the plunger B.
To prevent this action of the spring 21, the length of the incline 32 is limited
by the notch or depression 34, formed at the point of union of the incline 32 and
lever 24.
When the upper end 31, of the lever 30, rests in the depression 34, said pressure
upon the part 31 is relieved and changed into tension upon the lever 30, and the
part 31, acts as a lock to hold the lever 24, at its downward limit of motion, until the
plunger B, has raised sufficient to allow the spring E 2, to swing the tack feeding
finger inward and move the end 31 of the lever 30, out of the depression 34.
The spring 21, will then act as hereinbefore described and move the tack elevator
wheel one space.
The working face of the swinging cam 16 is also fitted to act as a lock against the
action of the spring 17, at the termination of its active movement, by allowing its
squared end to pass beyond the center of the roll 15 after the cam or angular part has
moved the slide 13, back the desired distance. The buckets of the tack elevator
wheel are designed to hold and carry about two tacks of the largest size to be used
in the tack driving machine, or in other words, to carry tacks enough to the inclined.
tack chute to give a supply slightly in excess of the demand.
In operation the loose tacks are placed in the hopper 7, from thence they flow
through the opening in the casing over the rim 6, to the interior of the elevator wheel
back of the buckets Fig. 2.
When the elevator wheel is revolved in the correct direction, the tacks roll over
and over in a mass, and some of the outer tacks of the revolving mass pass
through the openings 8, to the buckets of the elevator wheel, which are back
of the axis of its revolution, with reference to the delivery opening through the
casing.
These tacks arrange themselves parallel with the interior surface of the buckets of
the elevator wheel by their slight friction against the side of the stationary casing in
which the elevator wheel revolves.
When the tacks in the buckets of the elevator wheel have been moved up to the
opening 10 through the casing over the groove of the tack arranging chute, they roll
from said buckets substantially parallel therewith, and the diaphragm 20 guides them
into said groove.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In combination with mechanism for driving loose tacks, a tack elevator wheel
fixed to revolve in a casing, openings from the interior of said wheel to the buckets
thereof, tack receiving and delivering buckets adapted to deliver tacks substantially
parallel with the groove of a tack arranging chute located near the circumference of
said tack elevator wheel, and parallel, when viewed in plan, with the axis thereof,
substantially as and for the purpose set forth.
2. In combination with mechanism for driving loose tacks, a tack elevator wheel
fitted to revolve in a casing which surrounds the same openings from the interior of
said wheel to the buckets thereof, a delivery opening through the side of the casing
from said buckets, buckets for said wheel designed to carry tacks to said opening
regardless of the angular inclinations of said wheel, substantially as and for the
purpose set forth.
3. In combination with mechanism for driving loose tacks, a tack elevator wheel
fitted to revolve in a casing which surrounds the same openings from the interior of
said wheel to the buckets thereof, a delivery opening through the side of the casing
from said buckets, and mechanism to move said wheel bucket by bucket opposite said
opening, substantially as and for the purpose set forth.
4. In combination with mechanism for driving loose tacks, a tack elevator wheel

page_text: fitted to revolve in a casing which surrounds the same, a hopper connected to
said casing which communicates with the interior of said wheel, a delivery opening
through the side of the casing from said buckets, and mechanism to move said
wheel bucket by bucket opposite said opening, substantially as and for the purpose
set forth.
5. In combination with mechanism for driving loose tacks, a tack elevator wheel
fitted to revolve in a casing, openings from the interior of said wheel to the buckets
thereof, a delivery opening through the side of the casing from said buckets, mechanism
to move and then clamp said wheel bucket by bucket opposite said opening,
substantially as and for the purpose set forth.
6. In combination with mechanism for driving loose tacks, a tack elevator wheel
fitted to revolve in a casing which surrounds the same, openings from the interior of
said wheel to the buckets thereof, a delivery opening through the side of the casing
from said buckets, an inclined, tack chute located near the circumference of said
elevator wheel and parallel, when viewed in plan, with the axis of revolution thereof,
substantially as and for the purpose set forth.
7. In combination with mechanism for driving loose tacks, a tack elevator wheel
fitted to revolve in a casing which surrounds the same, openings from the interior of
said wheel to the buckets thereof, a delivery opening through the side of the casing
from said buckets, an inclined tack chute located near the circumference of said
elevator wheel and parallel, when viewed in plan, with the axis of revolution thereof,
carrying and delivering buckets for said tack elevator wheel, formed to act as one
side of the chute hopper and mechanism to move and stop said tack elevator
wheel with reference to the opening through the casing, substantially as shown and
described.
8. In combination with mechanism for driving loose tacks, a tack elevator wheel
fitted to revolve in a casing which surrounds the same, a delivery opening through
the side of said casing, an inclined tack chute, located near the circumference of said
elevator wheel and parallel, when viewed in plan, to the axis of revolution thereof,
an elastic diaphragm located over the upper end of the tack chute opposite the
delivery opening through the side of the casing, and mechanism to move and stop
said tack elevator wheel with reference to said opening, substantially as and for the
purpose set forth.
000