IMPROVEMENTS IN BLIND ROLLERS
Year: 1877

page_text: LETTERS PATENT to 'Gerard Wenzeslaus von Nawrocki, of the Firm of J.
Brandt and G. W. v. Nawrocki, of Berlin, in the German Empire, Engineers
and Patent Agents, for the Invention of "IMPROVEMENTS IN BLIND ROLLERS."
A communication from Gustav Koblinsky, of Berlin aforesaid.
Sealed the 13th October 1877, and dated the 24th April 1877.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 24th April
1877.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. v.
Nawrocki, of Berlin, in the German Empire, Engineers and Patent Agents.
"IMPROVEMENTS IN BLIND ROLLERS." A communication from Gustav Koblinsky,
of Berlin aforesaid.
The object of this Invention is to guide the blind cord, and to prevent its getting
disarranged or slipping off the roller pulley.
The roller or stick on which the blind winds is according to this Invention fitted
or formed with a flanged pulley, which may be of wood or metal, and on which the
cord winds. This pulley is surrounded by a box-formed casing which is fitted or
formed with a bracket for fastening to the woodwork by means of a spike or
otherwise, but by preference formed so as to take a spike with a long head resting
in the hook or staple-formed end of the bracket, the end peg or pin of the blind
roller has a bearing in the casing. The casing is fitted with two small rollers,
serving for the guiding of the cord, and nipping it rather tightly so that the violent
running down of the blind is prevented when the cord should get loose from its
place of attachment on the pulley; the casing has also a small door or cover, say,
at the top, for admitting the getting at the pulley therein in case the cord in course
of time should get detached therefrom. The cord guided between the guide rollers
winds itself evenly in layers between the flanges of the pulley. At the blind side
of the casing the blind stick may be fitted with a disc for preventing the cord
getting entangled between the pulley and the casing.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Office
on the 24th October 1877.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. v.
Nawrocki, of Berlin, in the German Empire, Engineers and Patent Agents.
"IMPROVEMENTS IN BLIND ROLLERS." A communication from Gustav Koblinsky,
of Berlin aforesaid.
The object of this Invention is to guide the blind cord, and to prevent its getting
disarranged or slipping off the roller pulley.
The roller or stick on which the blind winds is according to this Invention fitted
or formed with a flanged pulley, which may be of wood or metal, and on which the
cord winds. This pulley is surrounded by a box-formed casing which is fitted or
formed with a bracket for fastening to the woodwork by means of a spike or
otherwise, but by preference formed so as to take a spike with a long head resting
in the hook or staple-formed end of the bracket; the end peg or pin of the blind
roller has a bearing in the casing. The casing is fitted with two small rollers,
serving for the guiding of the cord, and nipping it rather tightly, so that the violent
running down of the blind is prevented when the cord should get loose from its
place of attachment on the pulley; the casing has also a small door or cover, say,
at the top, for admitting the getting at the pulley therein, in case the cord in course
of time should get detached therefrom. The cord guided between the guide rollers
winds itself evenly in layers between the flanges of the pulley. At the blind side
of the casing the blind stick may be fitted with a disc for preventing the cord
getting entangled between the pulley and the casing.
Figure 1 of the accompanying Drawings is part sectional elevation of a blind
roller fitted according to this Invention; Figure 2, an end view of the cord pulley
end; Figure 3, a section through the said pulley; and Figure 4, an end view of the
end of the blind roller.
The blind roller a is fitted with an ordinary flanged cord pulley b, in this case
made of tin; on this pulley the cord c is wound; n is a hook for tying on the cord
to the pulley. The pulley b is surrounded by a box-formed casing fformed with
a bracket g, which serves to fasten the casing f to a spike h with a bent or hook-
formed part fitting in a slot in the bracket g; the end peg i of the roller has its
bearing in the casing f; m is a throat-formed part of the casing for guiding the
cord; o is a hole in the casing f for getting at the cord in case of breakage; this
hole may be covered by a lid; p is a disc on the roller for keeping the blind from
getting entangled between the casing f and pulley b.
And having thus described and ascertained the nature of this Invention, I declare
that I claim, fitting a blind roller with cord pulley and casing, arranged sub-
stantially as set forth.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have
hereunto set my hand and seal, this Twentieth day of October, in the year
of our Lord One thousand eight hundred and seventy-seven.