Improvements in and relating to Window Blinds.
Year: 1890

page_text: Date of Application, 22nd Mar., 1890
Complete Specification Left, 24th Nov.. 1890-Accepted, 21st Mar., 1891
Improvements in and relating to Window Blinds.
WILLIAM HENRY SILCOCK, Mechanic, 45, Goldsmith Street, Barrow-in-
Furness, Lancashire, do hereby declare the nature of this invention to be as
follows:-
The improvements to window blinds consist in an appliance for raising the blind
by means of cords and pulleys so arranged that it will be raised equally and
level thus:-
A pulley is fixed at the top and one at the bottom of the window case-the one
at the bottom has a screw that goes through a bracket, with a nut to tighten a belt,
or cord, with or without a brake, this belt or cord is connected by links or other
contrivance to two other cords running on pulleys placed in the top of the blind,
this arrangement raises or lowers the blind by one simple movement of the side
cord.
Dated this 22nd day of March 1890.
COMPLETE SPECIFICATION.
Improvements in and relating to Window Blinds.
I, WILLIAM HENRY SILCOCK, of 45, Goldsmith Street, Barrow-in-Furness,
Lancashire, Mechanic, 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 :-
This invention relates to an improved appliance for raising and lowering the laths
of Venetian blinds by means of cords and pulleys so arranged that the laths may be
raised equally and level.
It will be fully described with reference to the annexed drawings.
Fig. 1. Front elevation of window with the apparatus applied thereto.
Fig. 2. Sectional elevation of window with the invention applied.
Fig. 3. Front elevation of appliance showing link to which the cords are attached
(enlarged scale).
Fig. 4. Side elevation of same.
Fig. 5. Front elevation of bottom pulley with device for tightening the cords.
Fig. 6. Side elevation of same with section through window.
Fig. 7. Plan of same with section through window.
A pulley A, is fixed at the top and a pulley B at the bottom of the window case.
The top pulley A is mounted in any suitable stationary bracket which is screwed
or otherwise fixed to the window frame. The bottom pulley B is mounted in a
sliding bracket C to which is attached an adjusting or regulating screw D. The
sliding bracket C moves to and fro longitudinally on a stationary bracket E fixed
to the window frame and the screw D passes down through a hole in a projecting
plate e which forms the bottom of the bracket E. On the underside of the plate e
the screw 1 engages with a nut d by means of which it is raised or lowered. A.
belt or cord F passes over the pulleys A and B which is free to be passed forward
in one direction but is prevented returning by a pawl or brake & engaging with a
ratelet or brake wheel on the side of the pulley B.
On the belt or cord F I place a link or connecting device G to which the two
ends of the belt Fare attached. To this link GI also attach the ends of the
CD

page_text: lifting cords H by which the laths of the blind are raised and which are attached
to the blind in the usual way. By this arrangement the blind may be raised or
lowered by the forward or backward movement of the side belt or cord F. When
the blind is raised the pawle and ratchet / retain it in any desired position and
when it is desired to lower the blind the ratchet is released. The link G is
preferably made with the inner pulley or runner g which travels up and down
against the other length of cord which prevents the link turning and the cords
becoming twisted together.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is :-
:-
1. The combination with a Venetian blind of the pulleys A and B with the belt
or cord F passing over them, the link C for connecting the cords and preventing
twisting and the ratchet device in connection with the pulley B for maintaining the
blind in a raised position substantially as described.
2. An appliance for raising and lowering Venetian blinds having top and bottom
pulleys over which a belt passes, ratchet device to hold the blind and connecting
link for attaching the cords together and preventing them twisting constructed and
arranged substantially as described and shown.
Dated this 18th day of March 1891.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.