Improvements in Blind Roller Fittings and Appliances.
Year: 1890

page_text: Date of Application, 24th Sept., 1890
Complete Specification Left, 24'h June, 1891-Accepted, 25th July, 1891
PROVISIONAL SPECIFICATION.
Improvements in Blind Roller Fittings and Appliances.
I, WILLIAM CLOUGH of 77 Georgiana Street, Bury Lancaster Power Loom
Overlooker, do hereby declare the nature of my said invention to be as follows:-
The object of this invention is the application of a volute spiral or other suitable
spring between the end of the blind roller and the bracket staple or other support
in which the axle revolves to create sufficient friction to prevent the blind roller
revolving and so letting the blind down in case of the cord becoming slack.
apply a similar spring also to the pulley of the adjustable blind rack round which
the endless blind cord passes and I sometimes mount this rack pulley at one
extremity of a D spring whilst the other extremity is secured stationarily to the
window frame and thus I obtain a substitute for a blind rack.
And in order to prevent the cord slipping around the stamped metal pulleys
applied to blind rollers or to blind racks I perforate the opposite sides of the
grooves with holes-the jagged edges of which holes serve to lay hold of the blind
cord and effectually prevent its slipping.
In some cases I fit the grooves of the pulley with pegs corresponding to the links
of a metal chain which I employ as a substitute for a blind roller cord.
Dated this 23rd day of September 1890.
JOHN G. WILSON,
Patent Office, 55, Market Street, Manchester, Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Blind Roller Fittings and Appliances.
I WILLIAM CLOUGH of 77 Georgiana Street Bury Lancaster, Power Loom
Overlooker 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 :-
The object of this invention is the application of a volute spiral or other suitable
spring between the end of the blind roller and the supporting bracket to create
sufficient friction to prevent the blind roller revolving and so letting the blind down
in case of the cord or chain becoming slack or broken.
On the accompanying drawing Fig. 1 is a front view and Figs. 2 and 3 side views
respectively of a blind roller with my improvements shewn applied thereto.
In carrying out my invention I employ a volute spiral or other suitable spring A
located between the end of the blind roller B and the supporting bracket C. This
spring A is by preference enclosed in the casing D which is secured to or formed
in one piece with the supporting bracket C and which may also form the bearing
as illustrated of the end of the blind roller B.
As the roller B is caused to revolve a sufficient amount of friction is created by
the spring A to prevent the roller revolving and so letting the blind down in case
of the cord or chain becoming slack or broken.
In Figs. 1 and 2 of the drawings I shew a chain E and chain wheels F as the
means employed for raising and lowering the blind but in case of a cord being
employed I apply the volute spring A to the rack as illustrated in Fig. 4 between
the small pulley G and the side of the adjustable sleeve piece, H.
In order to prevent the cord slipping around the stamped metal pulley G applied
to the rack or blind roller I provide the opposite sides of the grooves with a series

page_text: of holes or punctures the jagged edges of which serve to lay hold of the blind cord
and effectually prevent its slipping.
I sometimes mount this improved pulley at one extremity of a D spring (see edge
view Fig. 5) provided with the volute spring A whilst the other extremity is
secured to the frame-work of the window and thus I obtain a substitute for a
blind rack.
It will now be seen that by means of the volute spring which may be applied in
a variety of ways I am enabled to effectually prevent the roller revolving and
letting down the blind in case of the cord or chain becoming slack or broken.
Having thus 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:
1st. The application of a volute, spiral, or other suitable spring between the end
of a blind roller and its supporting bracket substantially as and for the purpose
herein before described and illustrated on the accompanying drawing.
2nd. The employment of perforated or punctured pulleys for blind racks or
rollers in conjunction with a volute spiral or other suitable spring substantially as
and for the purposes described and illustrated on the accompanying drawing.
3rd. The employment of a D spring as a substitute for the ordinary blind rack
with a pulley and volute spiral or other suitable spring applied thereto substantially
as hereinbefore described and illustrated on the accompanying drawing.
Dated this 23rd day of June 1891.
JOHN G. WILSON,
Agent for the Applicant.