Improvements in Hand Tackers used for Lasting Boots and Shoes.
Year: 1896

page_text: Date of Application, 12th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Hand Tackers used for Lasting Boots and Shoes.
I WILLIAM HENRY DORMAN, of the Green Hall, Stafford, Engineer, do hereby
declare the nature of this invention to be as follows:-
The object of this invention is the improvement of hand tackers which are used for
lasting boots and shoes and which are supplied with tacks in strips of paper or other
suitable material the tacks being inserted up to their heads at uniform distances
apart in the paper and the heads being covered by another strip of paper.
The tacker drives out the tacks one at a time into the boot upper by punching
through the paper and removing the tack together with a punching of the paper.
I provide a presser foot operated by the tacker which presses upon the strip. It
may be of tubular forin through which the driver descends to punch out the tack.
The foot is held down by a spring and can be withdrawn by a handle for the insertion
of the tack strip.
I also provide a latch operated by the tacker to raise the feed pawl clear of the
tacks in drawing back so that the pawl shall not ride upon the tacks.
I also remove the retaining pawl and form the throat so that one side opens to
admit a tack and I pivot the opening side upon the other portion of the throat so that
the movement shall be exact and the throat when closed shall be a true circle.
I also form the throat as a separate piece so that it may the more easily be fitted
up exactly.
Dated this 11th day of September 1896
I, WILLIAM HENRY DORMAN, of the Green Hall, Stafford, 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 is a further improvement on those described in former Specifications
of Letters Patent granted to me No. 19318 A.D. 1893 and No. 664 A.D. 1896, and
relates to hand tackers which are used for lasting boots and shoes and which are
supplied with tacks in strips of paper or other suitable material, the tacks being
inserted up to their heads at uniform distances apart in the paper and the heads
being covered by another strip of paper. The tacker drives out the tacks one at a
time into the boot upper by punching through the paper and removing the tack
together with a punching of the paper.
The invention consists in providing a presser foot, which presses upon the strip

page_text: and holds it securely while the driver descends to punch out the tack and releases the
strip to allow of the feed movement taking place. The foot is preferably made in the
form of a tube, through which the driver passes, and is held down upon the strip by
spring pressure. It can be raised by a handle to allow of the insertion of the tack
strip.
The invention also consists in providing a latch which raises the feed pawl clear of
the tacks during the return movement so that the pawl shall not ride upon the tacks.
The provision of the above presser foot renders the function of the former "retain-
ing claw" no longer necessary, as far as its engagement with the tack strip is
concerned, its jawl or claw is therefore removed and its end forms the opening side
of the throat which opens to admit a tack.
The opening side is pivoted upon the other portion of the throat so that its move-
ment is exact and the throat when closed forms a true circle.
The above throat is formed as a separate piece from the tacker case and is of
improved construction so that it, with its opening portion, may be the more easily
fitted up exactly.
The accompanying drawings illustrate my invention in which:-
Fig. 1. is a view of my improved hand tacker and
Fig. 2. is another view at right angles to the same but shewing the lower portion of
the tacker in section.
Fig. 3. is an elevation and
Fig. 4. a plan of the improved throat.
Fig. 5. is an elevation and
Fig. 6. an end view of the presser foot.
Fig. 7. is an elevation,
Fig. 8. an end view and
Fig. 9. an edge view of the latch
Fig. 10. is an elevation of the nozzle,
Figs. 11 and 12 are elevations and
Fig. 13 is a plan of the opening portion of the throat.
Fig. 14 is an elevation and
Fig. 15 a plan of the feed pawl.
The driver bar a (Figs. 1 and 2) is free to slide up and down in the case b being
normally supported by the spring e and struck down by the hand or a striking
instrument upon the knob a¹ for the purpose of driving a tack.
The driver a² is carried in the lower end of the bar a and punches out the tack
through the nozzle d (Fig. 10) and into the work.
A slotted lever e is mounted on a pivot e' in the case b and is operated by a stud e³
and die e³ carried by the bar a. In the lower end of the lever e is a slot et which
engages another die es mounted on a stud e in a slide e7 which is free to move
horizontally in the lower part of the case b. The slide e' carries the feed pawl f
(Figs. 14 and 15) which is held inwards by a spring but can be opened outwards for
the insertion of a tack strip by means of the handle f. It is also opened by the
operation of the tacker during the return movement of the slide e as will be
explained.
The presser foot g (Figs. 5 and 6) is free to slide up and down in the lower part of
the case b being made tubular and surrounding the driver a². It is serrated at its
lower end g where it bears upon the tack strip and is operated by a slide A (Figs. 7.
8. and 9.) which also is free to move up and down in the case b. The arm h' of the
slide A enters the groove y' of the presser foot g and the spring A' by depressing the
slide h depresses also the presser foot g. A handle h³ serves to raise the slide h and
presser foot g when a tack strip is to be inserted..
The slide h terminates in a latch h (Figs. 7. 8. and 9) which engages with an
incline formed on the feed pawl (Figs. 14 and 15). The latch A is also formed
with an incline h and when the slide e moves back with the pawl f these two
inclines and open the pawl f so that its point does not ride upon the tacks but
is lifted clear during the return movement.

page_text: Another incline f is formed upon the pawl f which before the forward or feed
movement of the tack strip takes place raises the slide h and presser foot g so as to
free the tack strip and as soon as the feed is finished allows the slide h to drop over
the step and the spring h² to depress the presser foot g on to the tack strip.
The throat piece i (Figs. 3 and 4) is made level on its upper face and is attached
to the case b. It has a recess 2 formed in its side for the reception of the opening
portion (Figs. 11. 12. and 13) which is mounted in it on a pivot j'. The surface j
of the portion j finishes level with the surface of the piece i and this enables the
fitting of the end j3 to be accurately done and the throat is to be formed a perfect
circle partly in the piece i and partly in the portion j the sharp upper edges of which
and cut the tack clean out of the paper strip when the driver a descends to
punch out the tack.
The apparatus acts as follows:-The tack strip is inserted in the opening k with
the tacks standing down in the slot the pawlf being raised by the handle f² and
the presser foot g by the handle hs to allow of the strip being inserted. The throat
piece is opened by the thumb piece so as to allow the first tack to enter the
throat . The nozzle d is then placed upon the work and a blow being given to the
knob a¹ sends down the driver a2 and drives the first tack into the work. The die e³
in passing down the slot e swings the lever e to the right (Fig. 1.) and moves back in
the same direction the slide e7 and feed pawl f which latter is lifted clear of the tacks
by the inclines f³ and ' until completely back when its point f falls in behind the
next tack.
The spring c now raises the bar a and the die e³ in rising up the slot e swings the
lever e to the left. (Fig. 1). The slide e' is also moved to the left with the feed pawl f
the incline f on which now raises the slide h and presser foot g after which the
point of the pawl f bears forward the tack which presses open the throat piece j
and passes into the throat the piece j closing in behind under the influence of a.
spring and shutting the tack into the throat from which it is driven by the next
descent of the driver a². The pawl point f is withdrawn by the action of the lever e
out of the way of the descending driver a before the latter strikes the tack.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is.
In a tack driving apparatus using "tack-strips."
1. The use of a presser foot, for alternately holding and releasing the tack strip, as
described.
2. The use of a presser foot actuated by a spring and raised by the forward move-
ment of the feed pawl before the latter engages the tack for feeding forward the
strip, as described.
3. The latch, operated by the forward movement of the feed pawl for opening the
feed pawl clear of the tacks in drawing back as described.
4. The improved feed pawl constructed to operate the latch for opening the feed
pawl as described.
5. The combination of the presser foot the latch and the feed pawl operating
together as herein described and illustrated.
6. The improved throat and its opening portion constructed as herein described
and illustrated in Figs. 3. 4. 11. 12. and 13.
7. The improved hand tacker as described and illustrated.
Dated this 10th day of June 1897.