IMPROVEMENTS IN PULLEYS FOR THE CORDS OF WINDOW AND OTHER BLINDS, MAPS, AND OTHER ARTICLES." PROVISIONAL SPECIFICATION
Year: 1880

page_text: LETTERS PATENT to Frederic Arthur Harrison, of Birmingham, in the County
of Warwick, Manufacturer, and Charles Priestland, of Birmingham aforesaid,
Tool Maker, for an Invention of "IMPROVEMENTS IN PULLEYS FOR THE
CORDS OF WINDOW AND OTHER BLINDS, MAPS, AND OTHER ARTICLES."
PROVISIONAL SPECIFICATION left by the said Frederic Arthur Harrison
and Charles Priestland at the Office of the Commissioners of Patents on the
11th August 1880.
FREDERIC ARTHUR HARRISON, of Birmingham, in the County of Warwick,
Manufacturer, and CHARLES PRIESTLAND, of Birmingham aforesaid, Tool Maker.
"IMPROVEMENTS IN PULLEYS FOR THE CORDS OF WINDOW AND OTHER BLINDS,
MAPS, AND OTHER ARTICLES."
Our Invention consists in constructing and arranging in the manner hereinafter
described the parts of pulleys for the cords of window and other blinds, maps, and
other articles.
We make the body or frame of the pulley by preference from sheet metal by dies
and pressure, the said sheet metal, body, or frame having a plain back plate or a
back plate without rack teeth on its inner face. In the front of the said frame or
body is the usual longitudinal slot, in which the pulley slide or carrier works. We
make the pulley slide or carrier of an oblong bar, having grooves in its longer
edges, the said grooves, when the pulley carrier is in its place, working upon the
edges of the slot in the frame or body, so that the said pulley carrier is situated
partly within and partly without the frame or body. The grooves described do not
fit the edges of the slot tightly, but permit the pulley carrier to work freely upon
the said edges.
The pulley or roller under which the blind or other cord passes is supported upon
the plain part of a binding screw having a large external head for turning it. The
said screw passes through and works in a screw box in the pulley carrier, the end
of the screw projecting from the back of the pulley carrier. The binding screw
D

page_text: described is prevented from being removed from the pulley carrier by a screw ring
or collet on the end of the screw.
Before putting the pulley carrier or slide in its frame or body the binding screw
is relaxed, so that the said pulley carrier is free to rise or fall in the slot in the said
frame, the end of the binding screw not being in contact when the pulley carrier is
placed in the frame with the closed back or back plate of the frame. After the
pulley carrier has been adjusted the head of the binding screw is turned so as to
cause the said screw to advance inwards and make its end bear forcibly against the
back plate of the frame. The pulley carrier is thereby forced outwards, that is,
towards the front of the frame, and the lip parts of the pulley carrier or slide within
the frame are bound very firmly against the inner side of the frame, and the pulley
carrier is thus fixed in its adjusted position.
In order to release the pulley carrier or slide the head of the binding screw is
turned in a direction proper to withdraw the end of the said screw from the back
plate of the frame. The pressure of the lip parts of the pulley carrier or slide upon
the front of the frame is thereby released, and the pulley carrier is free to rise
or fall in the slot in the frame for tightening or loosening the blind or other
cord.
In place of a thin grooved pulley slide or carrier, as described, a pulley slide or
carrier, consisting of a block of a size proper to nearly fill up the frame or body and
having a longitudinal rib at its middle for working in the slot in the frame may be
employed. In this case the end of the binding screw when in its withdrawn position
is situated nearly flush with the back of the pulley carrier instead of projecting from
it as in the first described arrangement.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frederic Arthur Harrison and Charles Priestland in the Great Seal
Patent Office on the 28th January 1881.
FREDERIC ARTHUR HARRISON, of Birmingham, in the County of Warwick,
Manufacturer, and CHARLES PRIESTLAND, of Birmingham aforesaid, Tool Maker.
"IMPROVEMENTS IN PULLEYS FOR THE CORDS OF WINDOW AND OTHER BLINDS,
MAPS, AND OTHER ARTICLES."
Our Invention consists in constructing and arranging in the manner herein after
described the parts of pulleys for the cords of window and other blinds, maps, and
other articles.
We make the body or frame of the pulley by preference from sheet metal by dies
and pressure, the said sheet metal body or frame having a plain back plate or a back
plate without rack teeth on its inner face. In the front of the said frame or body
is the usual longitudinal slot, in which the pulley slide or carrier works. We make
the pulley slide or carrier of an oblong bar having grooves in its longer edges, the
said grooves when the pulley carrier is in its place working upon the edges of the
slot in the frame or body, so that the said pulley carrier is situated partly within
and partly without the frame or body. The grooves described do not fit the edges
of the slot tightly, but permit the pulley carrier to work freely upon the said
edges.
The pulley or roller under which the blind or other cord passes is supported upon
the plain part of a binding screw having a large external head for turning it. The
said screw passes through and works in a screw box in the pulley carrier, the end of
the screw projecting from the back of the pulley carrier.
The binding screw described is prevented from being removed from the pulley
carrier by a screw ring or collet on the end of the screw.
After the
Before putting the pulley carrier or slide in its frame or body the binding screw
is relaxed, so that the said pulley carrier is free to rise or fall in the slot in the said
frame, the end of the binding screw not being in contact when the pulley carrier is
placed in the frame with the closed back or back plate of the frame.
pulley carrier has been adjusted, the head of the binding screw is turned so as to
cause the said screw to advance inwards and make its end bear forcibly against the
back plate of the frame. The pulley carrier is thereby forced outwards, that is,
towards the front of the frame, and the lip parts of the pulley carrier or slide within
the frame are bound very firmly against the inner side of the frame, and the pulley
carrier is thus fixed in its adjusted position.
In order to release the pulley carrier or slide, the head of the binding screw is
turned in a direction proper to withdraw the end of the said screw from the back
plate of the frame. The pressure of the lip parts of the pulley carrier or slide
upon the front of the frame is thereby relaxed, and the pulley carrier is free to
rise or fall in the slot in the frame for tightening or loosening the blind or other
cord.
In place of a grooved pulley slide or carrier as described, a pulley slide or carrier
consisting of a plate of nearly the same breadth as the frame, and having a
longitudinal rib at its middle for working in the slot in the frame may be employed.
We will now proceed to describe with reference to the accompanying Drawing
the manner in which our Invention may be performed.
Figure 1 represents in side elevation and end elevation, and Figure 2 in vertical
section a pulley constructed according to our Invention, the pulley slide or carrier
being represented fixed in its place in the frame or body; Figure 3 represents the
same view as Figure 2 with the pulley slide or carrier released, and Figure 4 is a
i

page_text: front elevation partly in section of the same; Figure 5 represents the pulley slide
or carrier with its binding screw and pulley or roller in front elevation, side
elevation, and plan detached from the frame or body.
The same letters of reference indicate the same parts in the several Figures of
the Drawing.
a is the body or frame of the pulley made from sheet metal by dies and pressure,
the said body or frame having a plain back plate b or a back plate without rack
teeth. The said body or frame may however be made by casting, but we prefer to
make it from sheet metal; c is the usual longitudinal slot in the front of the body
or frame a, in which slot the pulley slide or carrier d works. The said pulley
slide or carrier consists of an oblong bar or plate, having grooves d², d², in its
longer edges, the said grooves working upon the edges of the slot c, in the manner
shown in the plan view of Figure 1, where it will be seen that the pulley slide or
carrier is situated partly within and partly without the frame or body.
The grooves 2, 2, in the pulley carrier do not fit the edges of the slot c tightly,
but permit the pulley carrier to work freely upon the said edges when the pressure
upon it is released; e is the pulley or roller under which the blind or other cord
passes. This roller is supported upon the plain part of the binding screw f, having
a large external head f2 for turning it. It will be seen by an examination of the
section, Figures 2 and 3, that the screw f passes through and works in a screw
box g in the pulley slide or carrier d, the end of the said screw f projecting from
the back of the pulley slide or carrier. On the inner end of the binding screw f is a
collet or screw ring for preventing the removal of the screw from the pulley carrier.
The said collet also serves to increase the size of the end of the screw, and when
the latter is driven home takes an abutment against the back b of the frame or
body a.
In order to place the pulley slide or carrier in the frame or body a, the binding
screw is relaxed and the collet h made to bear against the inner face of the pulley
carrier, so that the grooves in the said pulley carrier may slide freely upon the
edges of the slot c, as represented in Figure 3, the end of the binding screw not
being in contact with the closed back of the frame.
After the pulley carrier has been adjusted in the frame the head f2 of the
binding screw f is turned so as to cause the said screw to advance inwards, and
make its end and the collet bear forcibly against the back plate b, as illustrated
in Figures 1 and 2. The pulley slide or carrier is thereby forced outwards by the
action of its screw f upon the screw box g of the said pulley slide or carrier, and
the inner lip parts of the grooves of the said pulley slide or carrier, or those parts
within the frame a, are bound firmly against the innerside of the said frame (see
the plan view of Figure 1) and the pulley slide or carrier is thereby fixed in its
adjusted position. When it is wished to release the pulley slide or carrier d the
binding screw f, f2, is turned in a direction proper to withdraw the end of the said
screw from the back plate b of the frame. The pressure or grip of the lip parts of
the pulley slide or carrier upon the inner sides of the frame is thereby relaxed and
the pulley slide or carrier is free to rise or fall in the slot c in the frame, as
illustrated in Figures 3 and 4.
Figure 6 represents in vertical section and horizontal section a pulley constructed
according to our Invention, in which the pulley slide or carrier is without
grooves in its edges, but has a rib at its middle for working in the slot in the
body or frame; Figure 7 represents the pulley slide or carrier separately; i is the
pulley carrier consisting of a plate of such a breadth that its edges bear closely
against the inner edges of the body or frame; and is the rib at the middle of the
pulley carrier for working in the slot in the frame or body.
When the binding screw f' is driven home the thin parts i, i, of the pulley
carrier bear closely against the inner sides of the frame a, as illustrated in the
horizontal section of Figure 6, and the said pulley carrier is firmly fixed in the said
frame.
The parts of the pulley, Figures 6 and 7, which we have not described are

page_text: the same as those of the pulley herein first described, and corresponding parts are
marked with the same letters of reference.
Having now described the nature of our Invention and the manner in which
the same is to be performed, we wish it to be understood that we claim as our
Invention of "Improvements in Pulleys for the Cords of Window and other Blinds,
Maps, and other Articles,"
The combination with a frame or body having a plain back plate or a back
plate without rack teeth of a pulley slide or carrier having grooved edges or a
middle rib for working upon or in the longitudinal slot in the frame or body,
together with a binding screw working in a screw box in the said pulley slide or
carrier, the pulley slide or carrier being bound to and released from the body or
frame, substantially as hereinbefore described and illustrated in the accompanying
Drawing.
In witness whereof, I, the said Frederic Arthur Harrison, have hereunto set
my hand and seal, this Twenty fourth day of January, in the year of our
Lord One thousand eight hundred and eighty one.
Witness,
RICHARD SKERRETT,
37, Temple Street,
FREDERIC ARTHUR HARRISON. (L.S.)
Birmingham.