Improvements in Window Blind Rollers and Fittings.
Year: 1887

page_text: Date of Application, 10th Nov., 1887
Complete Specification Left, 12th May, 1888
Complete Specification Accepted, 17th Aug., 1888
Improvements in Window Blind Rollers and Fittings.
We, JOHN COLBY of the parish of Oulton in the county of Suffolk, shipwright and
JOHN CHAMBERS of Lowestoft in the county of Suffolk, shipwright do hereby declare
the nature of this invention to be as follows:-
There
There are holes in the roller through which the blind is laced or sewn on.
are also grooves to receive the arms of a plate to which the pin for the axis of the
fixed pulley is attached. An elastic ring, with a groove in its edge, fastens this plate
and serves for a fixed pulley for the window blind cord. The bracket to take the axis
of the fixed pulley is made with a shoulder in the shank part which enables it to be
adjusted to some extent to the length of the roller. At the lower end of the window
blind cord we have a fixed or loose pulley the axis of which works in a rack shaped
frame. The pulley is kept in position by the strain on the cord.
This invention is hereinafter described with reference to the accompanying drawings
in which the same letters indicate like parts in all the figures.
Figure, 1. is a longitudinal section of a part of the roller, with fixed pulley and
axis.
Figure, 2. is a cross section of the roller.
Figure, 3. is the elevation of the plate to which the axis of the fixed pulley is
attached.
Figure, 4. is the plan of Figure 3.
Figure 5, is the plan of the elastic ring of fixed pulley.
Figure, 6. is a cross section of the ring.
Figure, 7. is the bracket for the axis of the fixed pulley.
Figure, 8, is a cross section of figure 7 in the line, g, g.
Figure 9 is the side elevation of the rack frame for the pulley at the lower end of
the window blind cord.
Figure 10 is the plan of the rack frame.
Figure 11 is the plan of the pulley.
Figure 12 is a cross section of figure 11.
Figure 13 is a thumbscrew.

page_text: The blind is laid along the roller and laced or sewn on by a string passing along the
grooves a a and through the holes c c.
The arms of the plate to which the axis of the fixed pulley is attached fit into the
grooves b in figure 2, these arms are shouldered near the ends and the points may be
bent from the shoulder and pressed into the roller.
The elastic ring for the fixed pulley is placed over the arms d and is turned inside
out in putting it on so the groove in its edge is then on the outside. A modification
of this ring may be made by having the groove made on the outside instead of the
inside edge.
The bracket has a screw thread from the shoulder to the end. The eye of the
bracket is oval in shape, the major axis being in the line gg and the minor axis being
of the same size as the diameter of the axis of the fixed pulley.
The rack frame for the lower pulley may be fastened with screws or the end
upper
may be left unfastened and the lower end secured by the thumbscrew h. The rack
may be used to turn this screw in, having a slot at in the frame for that purpose.
For very long blinds, instead of a rack frame for the lower pulley we may use the
ordinary block and sheave, the tail of the strap being made fast to a cleat, thus
drawing the window blind cord to the required tension.
Dated this Tenth day of November 1887.

page_text: JOHN COLBY of the parish of Oulton, Suffolk, Shipwright, and JOHN CHAMBERS
of Lowestoft, Suffolk, Shipwright 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:—
Our said invention relates to the construction of window blind rollers and fittings
so that the blind is laced or sewn on the roller. There are holes through the roller
and also grooves in its surface for the abovementioned purpose. Other grooves in the
roller take the arms of a plate to which the axis of the fixed pulley, or roller, is
attached. An elastic ring or band, with a groove in its edge binds the arms of the
plate and forms part of the fixed pulley. The bracket is cranked in shape. The
invention is hereinafter described with reference to the accompanying drawings in
which the same letters indicate like parts in all the figures.
Figure 1 is a longitudinal section of part of roller, elastic ring or band and axis of
fixed pulley. Figure 2 is a cross section of the roller. Figure 3 is the elevation of
the plate to which the axis of the fixed pulley is attached. Figure 4 is the plan of
figure 3. Figure 5 is the plan of the elastic ring or band with the groove in its edge
made preferably on the inside. Figure 6 is a cross section of figure 5. Figure 7 is
the bracket. Figure 8 is a section of figure 7. through the line gg. Figure 9 is the
side elevation of the rack for the pulley at the lower end of the window blind cord.
Figure 10 is the front elevation of the rack. Figure 11 is the plan of the pulley.
Figure 12 is a cross section of figure 11. Figure 13 is a thumbscrew.
The blind is laid along the roller and laced or sewn on by a string passing along
the grooves a a and through the holes c c. The arms of the plate to which the axis
of the fixed pulley is attached fit into the grooves 6 in figure 2. These arms are
shouldered near the ends and the points may be bent from the shoulder and pressed
into the roller.
The elastic ring or band is placed over the arms d and is turned inside out in
putting on so the groove in its edge is then on the outside.
The bracket has a screw thread at one end and an eye in the other. The shank is
also cranked in shape at that part where the screw thread commences. The eye in
the bracket is oval in shape. The major axis being in the line g g, the minor axis
being of the same size as the axis of the fixed pulley.
The rack pulley consists of a frame with the edge of each side scalloped to receive
the axis of the pulley as shewn in figure, 9. To tighten the cord, the pulley is pressed
down into the next scallop. This operation is facilitated by the elastic nature of the
ring forming part of the fixed pulley on the window blind roller.
The rack may be fastened with ordinary screws or the upper end may be left
unfastened and the lower secured by the thumbscrew, figure 13. The rack may be
used to turn this thumbscrew in having a slot at h for that purpose.

page_text: For a very long cord, in order that it might be more easily kept at a proper tension,
instead of a rack pulley, we use the ordinary rope strap tailed block and sheave. The
tail of the rope strap being made fast to a cleat on the window frame. Or, as a
modification, the lower end of the block may be left open, to admit of the insertion of
an endless cord. The rope strap would then end in two tails as in figures 14
and 15.
Figure 14 is a rope strap tailed block and sheave, in which k k is the window blind
cord and L the rope strap.
Figure 15 is a cross section of figure 14 in which m is the sheave and n is the pin
or axis of the sheave.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. A window blind roller on which the blind may be laced or sewn on.
2. The combination of a window blind roller having grooves in its surface and the
axis of the fixed pulley attached to a plate having arms to fit into the said grooves
substantially as described and shewn in the accompanying drawings.
3. The combination of a window blind roller and an elastic ring or band to serve
for the groove of the fixed pulley.
4. A bracket substantially as described and shewn in the accompanying drawings.
5. A rack pulley substantially as described and shewn in the accompanying
drawings.
6. The combination of a window blind cord and the ordinary rope strap tailed block
and sheave.
7. The combination of a window blind cord and a rope strap tailed block
open at the lower end, substantially as described and shewn in the accompanying
drawings.
T
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