A NEW OR IMPROVED DRIVING BELT
Year: 1873

page_text: LETTERS PATENT to Bruno Hoffmark, of Saint Petersburg, in the
Empire of Russia, but now temporarily of 29, Camden Square,
in the County of Middlesex, for the Invention of "A NEW OR
IMPROVED DRIVING BELT."-A communication from abroad by
Alexander Schnakowsky, of Saint Petersburg Russia.
PROVISIONAL SPECIFICATION left by the said Bruno Hoffmark at
the Office of the Commissioners of Patents, with his Petition,
on the 8th July 1873.
I, BRUNO HOFFMARK, of Saint Petersburg, in the Empire of Russia,
but now temporarily of 29, Camden Square, in the County of Middlesex,
do hereby declare the nature of the said Invention for "A NEW OR
IMPROVED DRIVING BELT," to be as follows:-
This driving belt is composed of a series of links, each link consisting
of wire formed into what may be termed a flat oval spiral. The links
are connected together by transverse rods having hooks at their ends.

page_text: The manner in which this belt is manufactured is as follows:-Iron
or other wire is wound by any suitable machine into the form of a flat
oval spiral; this spiral is then cut transversely into lengths which
correspond with the width of the belt to be manufactured. Each of
these lengths constitutes a link. The links are then connected together
by pushing the turns or twists of one link between the turns or twists of
the next or following link, and by then passing a rod transversely
through them both, so as to hold them together, the rod is hooked. at
both ends, and is securely held in position by folding the ends of the wire
of each link inwards, so as to be parallel with the rod or nearly so.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Bruno Hoffmark in the Great Seal Patent
Office on the 19th December 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BRUNO
HOFFMARK, of Saint Petersburg, in the Empire of Russia, but now
temporarily of 29, Camden Square, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth day of July, in the year of our
Lord One thousand eight hundred and seventy-three, in the thirty-seventh
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Bruno Hoffmark, Her special licence that I, the
said Bruno Hoffmark, my executors, administrators, and assigns, or such
others as I, the said Bruno Hoffmark, my 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 "A NEW OR IMPROVED DRIVING BELT,"
(a communication to me by Alexander Schpakowsky, of Saint Peters-
burg, Russia) upon the condition (amongst others) that I, the said
Bruno Hoffmark, 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

page_text: 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 Bruno Hoffmark, do hereby
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in
and by the following statement thereof, reference being had to the
accompanying Drawings, that is to say :-
This driving belt is composed of a series of links, each link consisting
of wire formed into what may be termed a flat oval spiral. The links
are connected together by transverse rods having hooks at their ends.
The manner in which this belt is manufactured is as follows:-Iron or
other wire is wound by any suitable machine into the form of a flat oval
spiral; this spiral is then cut transversely into lengths which correspond
with the width of the belt to be manufactured. Each of these lengths
constitutes a link. The links are then connected together by pushing
the turns or twists of one link between the turns or twists of the next or
following link, and by then passing a rod transversely through them
both so as to hold them together. The rod is hooked at both ends and
is securely held in position by folding the ends of the wire of each link
inwards so as to be parallel with the rod or nearly so.
The Invention will be fully understood on reference to the accom-
panying Drawings, of which Figure 1 represents a portion consisting of
three links a, a¹, a¹¹, of one of my driving belts, and Figure 2 an edge
view of the same.
Figures 3 and 4 represent two links in the position they occupy
relatively to each other before the insertion of the rod which holds them
together. From an inspection of these Figures it will be seen that each
link consists of wire formed into what I have herein-before termed a flat
oval spiral, the length of the spiral (undeveloped) being equal to the
width of the belt.
The several links are connected together by pushing the turns or twists
of one between the turns or twists of another, as represented in Figures
3 and 4, by then passing a hooked rod c transversely through them both,
afterwards pulling the links tight, as shewn in Figures 1 and 2, and
finally folding the ends b, b, inwards, as seen in Figure 1.

page_text: The belt can be made of any required length by employing the
requisite number of links, the two end links being connected together in
the manner already described, so as to make the belt endless. The belt
can also be made of any required width by cutting the wire spiral into
pieces of appropriate length.
And having now described the nature of the said Invention, and in
what manner the same is to be performed, I declare that I claim, manu-
facturing driving belts, substantially as herein-before described.
In witness whereof, I, the said Bruno Hoffmark, have hereunto
set my hand and seal, this Second day of December, One
thousand eight hundred and seventy-three.