Improvements in Window Blind Rollers.
Year: 1895

page_text: Date of Application, 10th June, 1595
Complete Specification Left. 31st Jan. 1996-Accepted, 7th Mar., 1896
PROVISIONAL SPECIFICATION.
Improvements in Window Blind Rollers.
THOMAS PURSEY, Artist 41 Bath Street, Portobello, Edinburgh, do hereby
declare the nature of this invention to be as follows:-
Fig. 1. of the appended sheet of drawings is a view of the reel to carry the cord
for drawing up the blind. The cap or socket (A) is shaped so as to fit on the end
of a blind roller. To the cap or socket (A) is attached a hollow tube (B). To the
hollow tube (B) is attached a rim (C). This arrangement forms the reel.
Inside the hollow tube (B) is inserted a spiral spring (D), and within the spiral
spring (D) is inserted a pin (E), as shown in Fig. 3 and 4. The pin (E) is loosely
rivited at the small end so as to allow the reel to revolve round it.
The spiral spring (D) is coiled in two coils, as shown in Fig. 2, the large coil (D')
is large enough to fit tightly within the hollow tube (B). The small coil (D) is
small enough to grip tightly the pin (E). The pin (E) has a square head that
fits tightly into a square hole in the bracket (H), so that the pin may always remain
stationary.
The combined action of this arrangement of reel, spiral spring, and pin are as
follows.
In drawing up the blind the reel and spiral spring revolves round the pin, but in
pulling down the blind, the small coil (D2) of spiral spring grips the pin so tightly
that the reel has to revolve round the large coil, (D') of spiral spring which causes
sufficient drag or brake to stop the blind where required.
Dated this 8th day of June 1895.
I, THOMAS PURSEY of 41 Bath Street, Portobello, near Edinborough, Scotland
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:-
My invention relates to improvements in the means for raising and lowering
window and other blinds which I accomplish in a simple and inexpensive manner
as follows:-
"
In order that my invention may be clearly understood and more easily carried
into practical effect I have appended hereunto a sheet of drawings upon which I
have given one illustration of my device as applied to an ordinary blind roller
which will be sufficient to make it clearly understood by others.
Figure 1 is a perspective view of the reel A' for carrying the cord K and is fixed
at one end of the roller.
Figure 2 shows one form of spiral spring D which I use in connection with the
reel A¹ and pin E.
Figure 3 is a view of the pin E which is inserted within the spring D.

page_text: Figure
thereon.
Figure 5 shows an alternative form of spring D.
Figure 6 is a front view of a window blind M and roller R showing my device
as attached to the right hand end of the roller, K representing the cord for raising
the blind, and S the cord for lowering the blind.
The reel A¹ upon which the cord K works is made of any suitable metal
preferably brass and consists as seen in Figure 1 of the cup or socket A (shaped
to fit on to the end of the blind roller R and having holes a2 for the attachment of
screws) and also carries the hollow tube or barrel B which encloses the spring D
and upon which the cord K is wound, and upon which the flange the rim or collar C
is also formed. This reel may be made in one piece as illustrated or it may be put
together in separate parts. Inside the hollow tube or cylinder BI insert a spiral
spring D of such like shapes, as shown, and through the said spring the pin E is
passed as shown in Figure 4. This spring is formed in such like manner as seen
in Figure 2 and also in Figure 5 and consists essentially of the large and small
coils D' and D the former being of sufficient diameter to tightly fit within the
hollow tube B whilst on the other hand the small coil D' grips the pin E.
As seen
at Figure 3 the pin E is formed with a square head e' at one end with the inside
shoulder e, and intermediate collar e³. The head e¹ fits into a square hole or slot
in the bracket H, so that it is prevented from turning round, whilst the end et is
loosely rivetted or secured inside the socket A as seen in Figure 4, so as to allow
the reel to revolve round the pin. The other end of the blind roller R is pivotted
and supported from the bracket H¹, 2 is a guide for the cord K and is pivotted to
the lower part of the bracket H. The action of the mechanism as described is as
follows: In drawing up the blind M by means of the cord K the reel A' revolves
with the spiral spring D around the pin E, but when the cord S is operated so as
to pull the blind downwards the reel with the blind roller R is revolved in the
reverse direction when the action of the spring D is also reversed, so that the small
coil D2 firmly grips the pin E thus causing the reel to revolve round the large
coil D. This produces a sufficient amount of drag or brake to cause the blind to
be fixed in any position where required thus avoiding the necessity for cord holders
or other devices to hold the same.
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 :-
1st. The improvements in window blind rollers having the fitting or barrel
socket A' mounted thereupon and containing a such like spring as D operating as
a brake substantially as herein set forth and as shown upon the drawings.
2ud. In fitting blind rollers the spring D mounted upon a pin E which is held
from revolving and so formed and mounted that the spring, clips either the inside
of the barrel or the pin according to the movement of the blind or roller whether
moving upwards or downwards substantially as set forth & shown.
3rd. The blind roller with its mountings as herein set forth and as shown upon
the drawings.
Dated this 30th day of January 1896.
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicant.