IMPROVEMENTS IN MEANS OR APPARATUS FOR PRODUCING FRICTION OB ADHESION BETWEEN PULLEYS, ROLLERS, AND THE LIKE, AND CORDS, BANDS, BELTS OR CHAINS PASSE SSED OVER OR ROUND THEM
Year: 1865

page_text: LETTERS PATENT to Martyn John Roberts, of Pendarren, near Crick-
howell, in the County of Brecknock, Esquire, for the Invention of
"IMPROVEMENTS IN MEANS OR APPARATUS FOR PRODUCING FRICTION OB
ADHESION BETWEEN PULLEYS, ROLLERS, AND THE LIKE, AND CORDS, BANDS,
BELTS OR CHAINS PASSE
SSED OVER OR ROUND THEM
"
PROVISIONAL SPECIFICATION left by the said Martyn John Roberts at
the Office of the Commissioners of Patents, with his Petition, on the
25th July 1865.
I, MARTYN JOHN ROBERTS, of Pendarren, near Crickhowell, in the. County
of Brecknock, Esquire, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN MEANS OR APPARATUS FOR PRODUCING FRICTION OR
ADHESION BETWEEN PULLEYS, ROLLERS, AND THE LIKE, AND CORDS, BANDS, BELTS,
OR CHAINS PASSED OVER OR ROUND THEM," to be as follows:-
The object of my Invention is to obtain greater friction or adhesion between
cords, bands, and other wrapping connectors, and the pulleys, rollers, or
similar appliances over or round which they run, in order that less slip may
occur and a truer motion be obtained.
My Invention consists in fitting to the pulley, wheel, or similar appliance an
elastic material to support or embrace the band or cord, and press against it
in its course round the pulley or wheel; or conversely, instead of fitting an

page_text: elastic support to the wheel or similar appliance, I sometimes impart to the
band or other wrapping connector considerable elasticity transversely or
laterally, while it has much less elasticity lengthwise. For example, I some-
times use two cords or chains side by side, and place an elastic substance
between them; I cause this combined band to run in a or other shaped
"groove in a pulley.
My Invention is particularly applicable to roller blinds, for which purpose
I prefer to fit to the roller two rings of vulcanized rubber side by side, upon
and between which the blind cord is supported, so that by the friction or
adhesion between the cord and the rings slip is prevented.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Martyn John Roberts in the Great Seal Patent Office
on the 25th January 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MARTYN
JOHN ROBERTS, of Pendarren, near Crickhowell, in the County of Brecknock,
Esquire, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of July, in the year of our Lord One
thousand eight hundred and sixty-five, in the twenty-ninth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Martyn John Roberts, Her special licence that I, the said Martyn
John Roberts, my executors, administrators, and assigns, or such others
as I, the said Martyn John Roberts, 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 "IMPROVEMENTS IN MEANS OR APPARATUS FOR PRODUCING FRICTION
OR ADHESION BETWEEN PULLEYS, ROLLERS, AND THE LIKE, AND CORDS, BANDS, BELTS,
OR CHAINS PASSED OVER OR ROUND THEM," upon the condition (amongst others)
that. I, the said Martyn John Roberts, 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.

page_text: NOW KNOW YE, that I, the said Martyn John Roberts, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, reference being had to the Drawings hereunto annexed,
that is to say:
The object of my Invention is to obtain greater friction or adhesion between
cords, bands, and other wrapping connectors, and the pulleys, rollers, or
similar appliances over or round which they run, in order that less slip may
occur and a truer motion be obtained.
My Invention consists in fitting to the pulley, wheel, or similar appliance an
elastic material to support or embrace the band or cord, and press against it
in its course round the pulley or wheel; or conversely, instead of fitting an
elastic support to the wheel or similar appliance, I sometimes impart to the
band or other wrapping connector considerable elasticity transversely or
laterally, while it has much less elasticity lengthwise. For example, I some-
times use two cords or chains side by side, and place an elastic substance
between them; I cause this combined band to run in a V or other shaped
groove in a pulley.
My Invention is particularly applicable to roller blinds, for which purpose
I prefer to fit to the roller two rings of vulcanized rubber side by side, upon
and between which the blind cord is supported, so that by the friction or
ndhesion between the cord and the rings all slip is prevented.
Figuro 1 of the accompanying Drawings represents a roller blind with my
means or apparatus applied thereto. A is the blind roller; B, B, are two
rings of vulcanized rubber placed side by side; C is the blind cord, which is
supported upon and between the rings B, B, so that by the friction or
adhesion between the cord and these rings slip is prevented; D, D, aro
flanges, between which the rings B, B, are held.
Figure 2 represents a blind roller A, fitted with rings B, B, of a different
shaped section to those shown in Figure 1. Any other convenient shaped
elastic rings may be adopted, and sometimes instead of employing two rings I
employ only one ring, as shewn in Figure 3, with a recess in which the blind
cord is received and supported.
Figure 4 represents my Invention applied to a spindle of a spinning frame
for preventing slip between the whorl and the cord, by means of which motion
is imparted thereto. a is the whorl, and b, b, are two vulcanized rings held
between the flanges d, d, of the whorl; c is the cord by which motion is
imparted to the whorl; this cord is received and supported upon and between
the rings b, b.

page_text: Figure 5 represents my apparatus where, instead of fitting an elastic
support to the wheel or similar appliance, I impart elasticity transversely or
laterally to the band or other wrapping connector as before mentioned. a, a,
are two chains parallel to each other, between which pieces of vulcanized
rubber b, b, are held. The pulley c, over which this combined band is passed,
is formed with a V-shaped groove d, so that as cach portion of the band passes
over the pulley the pieces of rubber bare compressed between the two
chains a, a, and slip is thereby prevented.
And having described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim,―
First, producing friction or adhesion between cords, bands, and other
wrapping connectors, and the pulleys, rollers, or similar appliances over or
round which they run by means of an elastic material fitted to the pulley or
other appliance so as to support or embrace the band or cord substantially as
herein-before described.
Second, producing such friction or adhesion by imparting considerable
elasticity transversely or laterally to the band or other wrapping connector,
while it has much less elasticity lengthwise, substantially as herein-before
described.
In witness whereof, I, the said Martyn John Roberts, have hereunto
set my hand and seal, this Twenty-fourth day of January, One thousand
eight hundred and sixty-six.
MARTYN J. ROBERTS. (L.S.)