IM- PROVEMENTS IN BLIND PULLEYS
Year: 1867

page_text: LETTERS, PATENT to Frederick George Newton Perrett, of Somerton,.
Torquay, in the County of Devon, Surveyor, for the Invention of "IM-
PROVEMENTS IN BLIND PULLEYS."
Sealed the 17th September 1867, and dated the 20th June 1867.
PROVISIONAL SPECIFICATION left by the said Frederick George Newton
Perrett at the Office of the Commissioners of Patents, with his Petition,
on the 20th June 1867.
I, FREDERICK GEORGE NEWTON PERRETT, of Somerton, Torquay, in the
County of Devon, Surveyor, do hereby declare the nature of the said Invention.
for "IMPROVEMENTS IN BLIND PULLEYS," to be as follows:-
First, the object is by this self-regulating pulley to keep the cords of all
curtains and window roller blinds always at a uniform tension, thus obviating
the too frequent occurrence of all curtains and blinds being out of order and
unrolling by slackening and breaking of cords.
Second, description. It is a metal ballance pulley weight suspended by the
cord passing under a sheave at its upper end and over the sheave or wheel of
curtain or roller blind. The said metal weight is enclosed in a metal case open
at one or both ends.

page_text: Third, the means. The metal weight thus sliding in its casing always retains
the curtains and roller blind cords at one uniform tension or tightness, and
depending as it does on nothing else beyond its mere weight can never, as in
the case of springs and simular variable means, fail in its operation nor get
out of order.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick George Newton Perrett in the Great Seal Patent
Office on the 20th December 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
GEORGE NEWTON PERRETT, of Somerton, Torquay, in the County of Devon,
Surveyor, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of June, in the year of our Lord One
thousand eight hundred and sixty-seven, in the thirtieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Frederick George Newton Perrett, Her special licence that I, the said
Frederick George Newton Perrett, my executors, administrators, and assigns,
or such others as I, the said Frederick George Newton Perrett, 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 BLIND PULLEYS,"
upon the
condition (amongst others) that I, the said Frederick George Newton Perrett,
my executors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, should particularly describe and ascer-
tain 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..
NOW KNOW YE, that I, the said Frederick George. Newton Perrett, do
hereby declare the nature of my said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:
This Invention consists of improvements in blind or curtain pulleys, its
object being to secure at all times a uniform tension of the cords of all kinds.

page_text: of curtains and window roller blinds, thereby preventing the blinds from
getting out of order and unrolling by the slackening or breaking of the cords,
and also for rendering the use of springs and other similar mechanism
unnecessary.
In carrying this Invention into effect I pass a cord over the wheel or sheave
of the curtains or roller blinds in the ordinary way, and then pass the same
under a wheel, roller, or sheave fixed at the upper end of a balance weight of
any required shape or size enclosed in an outer casing of metal, this outer casing
being made open at both ends so that the weight can work up or down through
the same, and by its weight alone retain the curtain or roller blind cords at one
uniform tension.
In the accompanying Drawing where similar letters appear they refer to
the same parts..
Figs. 1, 2, 6, and 8 shew elevations of the balance weight and outer casing;
Figs. 3, 5, 7, and 9, plan views of the same shewing the wheel round which
the blind cord is passed; and Fig. 4 is a sectional elevation of the balance
weight, also shewing the roller.
a is the outer casing of metal or other substance; b, the balance
weight carrying the roller or wheel c, round which the cords d of the blinds
pass.
I claim as my Invention the application of the balance weight and roller
as herein described to curtains and roller blinds for keeping the cords thereof
at a uniform tension, and thus preventing the blind from getting out of order;
but I do not confine myself to any particular or singular form of the balance
weight or of the outer casing, which may also bear any desired ornamentation
or configuration.
In witness whereof, I, the said Frederick George Newton Perrett,
have hereunto set my hand and seal, this Seventh day of
December, in the year of our Lord One thousand eight hundred and
sixty-seven.
FREDERICK GEORGE NEWTON PERRETT. (L.S.)