IMPROVED MEANS AND APPARATUS FOR SCREWING SOLES ON BOOTS AND SHOES, APPLICABLE ALSO FOR UNITING OTHER THICKNESSES OF LEATHER
Year: 1875

page_text: LETTERS PATENT to Adolf Angst, of Zurich, Switzerland, for the
Invention of "IMPROVED MEANS AND APPARATUS FOR SCREWING SOLES ON
BOOTS AND SHOES, APPLICABLE ALSO FOR UNITING OTHER THICKNESSES OF
LEATHER."
Scaled the 11th February 1876, and dated the 11th November 1875..
:
PROVISIONAL SPECIFICATION left by the said Adolf Angst at the
Office of the Commissioners of Patents, with his Petition, on the
11th November 1875.
I, ADOLF ANGST, of Zurich, Switzerland, do hereby declare the
nature of the said Invention for "IMPROVED MEANS AND APPARATUS FOR
SCREWING SOLES ON BOOTS AND SHOES, APPLICABLE ALSO FOR UNITING OTHER
THICKNESSES OF LEATHER," to be as follows:-
My Invention relates to means employed in securing soles on boots
or shoes, and uniting thicknesses of leather for other purposes; and it
consists in an improved apparatus or device whereby a screw of peculiar
construction may be readily forced or driven through the leather by the
blow of a mallet.

page_text: The improved apparatus or device consists of a suitable handle or
frame in which the moving parts are mounted. Within this handle or
frame a rod is fitted to slide in suitable guides. The upper end of this
rod projects from the top of the frame and may terminate in a knob
which is struck by the mallet. This rod acts as a driver to transmit the
blow of the mallet to the screw and drive it into the leather. It is pro-
vided with a spring to keep it raised, and terminates at the lower end in
a pin working in a guide or socket at the bottom of the handle or frame
in which the screw is received. This guide or socket is provided with a
small check spring to prevent the screw falling out. At the foot of the
frame there is an adjustable guide or stop consisting of a disc fixed
eccentrically on a pin on which it can be turned to regulate the distance
of the screws from the edge of the sole as required.
The screws used as before stated are of peculiar construction, being
pointed at both ends and having several threads. The screws must
correspond in length to the thickness of the material to be connected.
A screw is placed in the guide socket, as before mentioned, and its upper
end is received in a corresponding recess of conical form in the end of
the driver pin. This double pointed form of screw and conical socket
admits of the screw when driven into the leather by a blow, as above
mentioned, rotating on its own axis and thus screwing itself into the
leather, whereby the sole or other article is very securely fastened.
For convenience in using this instrument or appliance I fix the last
upon supports on a stand or pedestal. The last is bedded near the toe
upon a pivoted support, and is fixed near the heel to a cranked lever
mounted in bearings adjusted by a screw.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Adolf Angst in the Great Seal Patent Office on
the 10th May 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ADOLF 30
ANGST, of Zurich, Switzerland, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of November, in the
year of our Lord One thousand eight hundred and seventy-five, in the

page_text: thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Adolf Angst, Her special
licence, that I, the said Adolf Angst, my executors, administrators,
and assigns, or, such others as I, the said Adolf Angst, executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVED MEANS
AND APPARATUS FOR SCREWING SOLES ON BOOTS AND SHOES, APPLICABLE ALSO FOR
UNITING OTHER THICKNESSES OF LEATHER," upon the condition (amongst
others) that I, the said Adolf Angst, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Adolf Angst, do hereby declare
the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying
Sheet of Drawings, and to the letters and figures marked thereon,
that is to say :-
My Invention consists in screws peculiarly formed and operated for
securing soles on boots and shoes, and uniting other thicknesses of
leather; and also in an apparatus for use in driving such screws through
the leather by the force of a blow in the same way that a nail is
driven.
In order that my Invention may be more readily understood I have
illustrated it in the Drawings annexed, in which Figure 1 shows a screw
on an enlarged scale, and Figure 2 a part sectional elevation of the
apparatus for use in driving such screws.
The screws are conically pointed at both ends, as shown, and have
two or more threads of rapid pitch in order that they may be driven into
the leather by the force of a blow applied through a pin or other device
having a conical socket in which one of the pointed ends of the screw is
received. This peculiar form of screw and socket opposes but little
.

page_text: friction to the rotation of the screw on its own axis when driven into
the leather, and the screw when struck thus screws itself through and
firmly unites the leather. The screws must correspond in length with
the thickness of the material to be united, and they must therefore be
made of different lengths in order to suit different thicknesses. Both
ends of the screw are similarly pointed so that either end may be driven
through the leathe
friction to the rotation of the screw on its own axis when driven into
the leather, and the screw when struck thus screws itself through and
firmly unites the leather. The screws must correspond in length with
the thickness of the material to be united, and they must therefore be
made of different lengths in order to suit different thicknesses. Both
ends of the screw are similarly pointed so that either end may be driven
through the leather.
The apparatus shown in Figure 2 consists of a guide frame a which is
also used as a handle by which to hold the apparatus in position. In
this handle or frame a rod or plunger 6 is fitted to slide, as shown, the
upper end of said rod or plunger projecting from the top of the frame
and terminating in a knob b¹ to be struck by the mallet. The rod or
plunger 6 is provided with a spring c to keep it raised, said spring being
compressed between the frame or handle a and a collar c¹ on the rod or
plunger b. In the lower end of the said rod there is fixed a pin e of the
same diameter as the screw to be driven, the said pin being fitted to
slide through a guide or socket fat the lower part of the frame a. In
this guide or socket the screw to be driven is placed, as shown, and is.
prevented from falling out by a small spring a fitted in the guide or
socket at one side, as shown. The pin e has a conical cavity in its
extremity to receive the point of the screw. At the foot of the frame
there is an adjustable guide, also shown in under side plan at Figure 3,
consisting of a disc h fitted eccentrically on a stud i fixed to frame a, on
which it can be turned to regulate the distance of the screws from the
edge of the sole as required.
-
The method of using my Invention consists merely in placing a screw
of the form shown in the guide f, applying the apparatus to the sole or
other article with the disc h against the edge thereof, and then striking
the head of the rod or plunger 6 with a heavy mallet, whereby the screw
will be driven through the leather, as above described.
For convenience in using this apparatus I prefer to fix the last upon
supports on a stand or pedestal, as shown in Figure 4. The last is
bedded near the toe upon a fixed support / shaped to receive it, and is
fixed near the heel to one arm of a crank lever 1, mounted as shown,
and adjusted by a screw m.
Having described the nature of my Invention, and the manner of

page_text: performing the same, I declare that what I claim as the Invention to be
protected by the herein-before in part recited Letters Patent is,-
1st. The form herein-beforo shown and described of double pointed
quick threaded screw, as and for the purpose described.
2nd. The method of screwing a screw of the form described through
leather by the force of a blow applied as described.
3rd. The apparatus, constructed and used substantially as described
and shown in Figure 2, for driving or screwing a screw of the form
specified.
In witness whereof, I, the said Adolf Angst, have hereunto
set my hand and seal, this Twenty-fourth day of April, in
the year of our Lord One thousand eight hundred and seventy-
six.