Improvements in Tack Driving Machines.
Year: 1896

page_text: Date of Application, 6th Oct., 1896-Accepted, 9th Jan., 1897
Communicated from abroad by WILLIAM GODDU, of Winchester, in the County
of Middlesex and State of Massachusetts, United States of America,
Manufacturer.1.
Improvements in Tack Driving Machines.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co.; Patent
Agents, 45 Southampton Buildings, in, the County of Middlesex, 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 tack driving, machines and is illustrated in the
accompanying drawing in which
Figure 1 is a longitudinal section;
Figure 2 a rear elevation, with the tack holder removed;
Figure 3 a front elevation, partly in section, as indicated by the dotted line 3-3
of Fig. 1, illustrating my invention.
-
Figure 4 is like Fig. 2, but with the driver up.
Figure 5 is a section of the tack holder and tack way;
Figure 6 is a detail in section to illustrate the operation of the tack feeding
mechanism.
This invention is shown as a hand-tacker, that is, with the driver, A fast to
slide a, which is reciprocated by the handle a¹, but in a power tacker the slide a,
will be reciprocated by suitable mechanism, as will be clear without description.
The motion of slide a, oscillates the segmental gear b, which meshes with the
gear, on the tack-holder B,.which .oscillates on stud B, in which is the tack
way, and this combination of the tack-holder B with the tack way B', so that the
tack-way serves as stud to support the tack-holder, and about which the tack-
holder rotates, is one feature of this invention. In the hand machine shown, the
slide a, is the simplest and best moving part from which to impart motion to the
tack-holder, and the combination of slide a, with the tack-holder B, and tack-
way B' by means of the gears 6 and 6, or other suitable connecting mechanism, is
a second feature of this invention. In order to drive a tack at each stroke of the
driver A, the tackwäy B' must be kept supplied with tacks, and, in order to insure
that supply the tacks in the holder B must be thrown upon the upper surface of
the stud: B, some of the tacks entering the groove in that stud, and hanging by
their beads so that they pass down that groove; through the hollow stem of the
tack-holder B, as will be clear from Figs. 1 and 4.
When the tack holder B cscillates on stud B', the bore through the stem of holder B
should be inclined to the geometrical axis of holder B, in order that the rib b' on the
inner surface of holder B shall move far enough to throw the tacks in holder; B in
such a way as to scatter them over the flattened surface of stud B. This is the
main advantage of eccentric arrangement of holder. B on stud B', and this is a.
third feature of this invention.
Another advantage of this construction is that the rib may be used to deflect
the tacks thrown up by rib b' on to the stud B', as will be clear from the dotted
lines of Fig. 5, which show the holder B at the end of one oscillation, with one

page_text: surface of rib in position to deflect the tacks on to the flattened upper surface of
stud B. At the end of the other, oscillation, the left side of rib will so act, the
rib being at that time as far to the right as it, is shown to the left by the dotted
lines in Fig. 5; and the rib 62, being at that time as far to the left as it is shown
to the right.
The segmental gear 6 is fast to rock-shaft 6, and a roll on arm of rock
shaft enters the cam groove 6 in slide a, as shown in Fig. 1, and by dotted
lines in Figs. 2 and 4.
The picker D is fast to lever d, whose fulcrum is at d', and which is actuated by
the cam din slide a; the roll on the upper end of lever d entering that cam.
When the driver A is down as far as it will go, Fig. 1, the picker D is drawn
back, to allow the lowermost tack to rest against the side of the driver; but as
the driver is drawn up the picker is thrown forward, the thin end of its fingers
passing between the lowermost tack in the way and the tack above it, thereby
pressing the lowermost tack from the way and bringing it in line with the driver,
as soon as the driver has been drawn up far enough to clear the head of the lower-
most tack; as shown in Figs: 4 and 6. When the driver is thrown down the
picker is moved to and fro across the way, and then drawn back far enough to
uncover the way and permit the lowermost tack to rest against the side of the
driver.
The lever d is prevented by friction from moving except as it is moved by the
surface of the cam d, the surface on the left acting as the driver and its slide are
moved down, and the surface on the right, as they are moved up.
The operation is as follows: With the holder B partially filled with loose tacks,
and with a row of tacks hanging by their heads in the way in stud B, the tack
tube E is pressed against the work, and the driver-A raised and then driven, thus
operating the picker, driving one tack and scattering some of the tacks in the
holder upon the flattened surface of the stud which forms the tack way. In case
of the sticking of a tack in the lower end of the way as as to interfere with the
operation of the picker, the upper arm of the picker lever, which is a spring, will
yield, and the resistance thus offered to the action of the driver will call attention
to the defect.
Having now particularly described and ascertained the nature of the said inven
tion, and in what manner the same is to be performed, as 'communicated to me
by my foreign correspondent, I declare that what I claim is:
First. In a tacker, a cylindrical stud grooved to form a tack way, combined with
a tack holder which has a stem at one end bored to receive. the cylindrical stud,
whereby the stud is both a tack way and a support upon, which the tack holder
oscillates, substantially' as described.
-Second. In a-tacker the driver A; its slide a, containing cam groove 6'; rock
shaft b; its arm 6, engaging cam groove in slide a ;, segmental gear b fast to
rock shaft ; gear 6 meshing with segmental gear ; and hopper B.fast to
gear b; all combined substantially as described.
Third. In a tacker a cylindrical stud grooved to form a tack way; a tack
holder which has a stem at one end, bored on a slant to the axis of the holder, and
serving as a journal box for the cylindrical stud, and a rib, as 6 to, throw the tacks
on to Battened surface of the stud when the tack holder oscillates, substantially as
described.
Fourth. In a tacker a tack holder with a stem, bored on a slant to, the axis. of
the holder, combined with a stud which is also, the tack way, and with a pair of
ribs as 66, one for throwing, and the other, for deflecting the tacks on. to the
flattened surface of the stud, all substantially as described.,
**
Fifth. In a tacker the driver and its slide.combined with the picker,. by
means of a lever carrying the picker, and a cam on the, slide, substantially as
described.
****

page_text: Sixth. The improved tacker above described, having the driver, its slide, its
picker and its tack holder combined by connecting mechanism to impart motion
to the picker and to the tack-holder from its slide, substantially as described.
Dated this 6th day of October 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.