Improvements in Spring Blind Rollers.
Year: 1891

page_text: Date of Application, 24th Dec., 1891
Complete Specification Left, 21st Sept., 1892-Accepted, 24th Dec., 1892
•
PROVISIONAL SPECIFICATION.
Improvements in Spring Blind Rollers.
I, JAMES ROBERTSHAW, of Churnett Street, Rochdale Road, Manchester, in
the County of Lancaster, Blind Manufacturer do hereby declare the nature of this
invention to be as follows:-
It is applicable to all blind rollers in which a spiral or coil spring is used for
winding the blind, and it consist in fitting in any suitable manner, a tube, or tubes,
of tin, or other suitable material, within the inside of the coil spring or springs in
such a manner as to prevent it or them from being drawn out of shape and rendered
useless, by over-pressure or other strain.
Dan and day of December 1891.
JOHN HENRY TOPHAM,
464, Market Street, Manchester, Agent to Applicant.
COMPLETE SPECIFICATION.
Improvements in Spring Blind Rollers.
I, JAMES ROBERTSHAW, of Churnett Street, Rochdale Road, Manchester, in
the County of Lancaster, Blind Manufacturer, do hereby declare the nature of this
invention and in what mauner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
It is applicable to all blind rollers in which a spiral or coil spring is used for
winding the blind.
This coil spring is inserted in a longitudinal hollow cut or formed in the interior
of the roller and is attached by one end to the roller and by the other to a non-
rotating spindle. Owing to the excessive strain upon the spring it becomes sooner
or later drawn out of shape at one or both ends.
My invention consists in placing within the spiral spring at one or both ends, a
tube or tubes of tin or other suitable material of sufficient diameter to prevent the
spring from being drawn to such a tight or narrow coil that its elasticity is not
sufficient to return it to its tubular form.
I attach the tube by one end to the wooden plug through which the nonrotating
spindle is passed and to which the tube serves as a continuation.
Where a double spring is used for very heavy rollers 1 employ two tubes, one to
increase the diameter of the non-rotating spindle and the second outside the inside
spring to provide a smooth surface for the outer spring.
Referring to the drawing sent herewith, the figure shows a longitudinal section of a
blind roller with a coil spring of four coils. The spring is inserted in the cavity a
in the roller and attached at 6 to the non-rotating spindle e, it is coiled to and fro
for four coils one above the other, the end of the fourth coil being taken over the
tube d which forms a continuation of the wooden plug f to which the other end of
the coil spring is attached at c, the tube d preventing the fourth coil of the spring
from being drawn tight upon those beneath it.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
In a spring blind roller, one or more tubes, substantially as described herein-
before, and in the accompanying drawing for the purpose set forth.
Dated this 20th day of September 1892.
JOHN HENRY TOPHAM,
46, Market Street, Manchester, Agent to Applicant.