Year: 1887

page_text: I, THOMAS CALDWELL of 154 Blackburn Road, Bolton in the County of Lancaster
Ironmonger, do hereby declare the nature of my said invention to be as follows:-
My invention relates to improvements in roller blind furniture and consists in a
novel method of forming and attaching the same with an improved apparatus for
holding and releasing the cord by which the blind is raised or lowered. The rollers to
which my improvements are applicable are made circular in which case the metallic
cord pulley is provided with a circular rim or disc on the inner side of which is
attached a centre pin for the purpose of being centred into the roller. The centre pin
is for a certain distance of circular form the remaining part being made square with
grooved sides by which twisting or turning of the pin in the roller is entirely obviated.
The inner ends of the square grooved part of the pin are made to project above the
surface of the circular portion of the pin for the purpose of thoroughly securing the
same in the wood roller and preventing the same being drawn by anything but sheer
force. The collar screwed onto the end of the wood roller is provided with a square
hole and is mounted on a square part of the centre pin. On the circular disc is cast
or otherwise a boss sufficiently long and large in diameter to receive the cord
necessary to operate the blind, the boss being provided with a hole or recess to
receive the knot on the end of the cord. The cord pulley is provided with a ratchet
wheel, which may be formed on the cord pulley itself. The cord pulley is fitted with
a centre which projects and fits into a suitable metallic bracket which allows of easy
admittance of the same. In the bracket next to the cord pulley is provided an
inclined slot in which slides the centre pin of the cord pulley. To this bracket is
pivoted a cam lever in the lower end of which is a hole through which the winding
cord passes. When the blind is at rest and the cord hangs loosely the weight of the
blind and roller causes the centre pin to sit at the bottom end of the inclined slot and
on the cam by which the lever is pressed backwards, the blind being arrested by a
stationary pin on the supporting bracket engaging with the ratchet wheel before

page_text: mentioned. When it is desired to raise or lower the blind it is effected by pulling
the cord outwardly which operates the cord lever and lifts the centre in the inclined
slot by the cam, by which the ratchet wheel is lifted out of contact with the stationary
pin, thus allowing of the movement of the blind at will. The opposite end of the
blind roller is fitted with a disc screwed thereto and provided with a centre which sits
in a suitable bracket with a circular or segmental opening provided with a stop or its
equivalent to prevent the same jumping out.
Dated the 21st December 1887
EDMUND CHADWICK, C.E., Fel. Inst. P.A.,
92, St. George's Road, Bolton,
Agent for Applicant.

page_text: Improvements in Roller Blind Furniture.
I, THOMAS CALDWELL of 154 Blackburn Road, Bolton in the County of Lancaster,
Ironmonger, 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 roller blind furniture and consists in a
novel method of forming and attaching the same with an improved apparatus for
holding and releasing the cord by which the blind is raised or lowered. The rollers
to which my improvements are applicable are made circular in which case the metallic
cord pulley is provided with a circular rim or disc on the inner side of which is
attached a centre pin for the purpose of being centred into the roller. The centre pin
is for a certain distance of circular form, the remaining part being made square with
grooved sides, by which twisting or turning of the pin in the roller is entirely obviated.
The inner ends of the square grooved part of the pin are made to project above the
surface of the circular portion of the pin for the purpose of thoroughly securing the
same in the wood roller and preventing the same being drawn by anything but sheer
force. The collar screwed onto the end of the wood roller is provided with a square
hole and is mounted on a square part of the centre pin. On the circular disc is cast
or otherwise a boss sufficiently long and large in diameter to receive the cord
necessary to operate the blind, the boss being provided with a hole or recess to
receive the knot on the end of the cord. The cord pulley is provided with a ratchet
wheel, which may be formed on the cord pulley itself. The cord pulley is fitted with
a centre which projects and fits into a suitable metallic bracket which allows of easy
admittance of the same. In the bracket next to the cord pulley is provided an
inclined slot in which slides the centre pin of the cord pulley. To this bracket is
pivoted a cam lever in the lower end of which is a hole through which the winding
cord passes. When the blind is at rest and the cord hangs loosely the weight of the
blind and roller causes the centre pin to sit at the bottom end of the inclined slot and
on the cam by which the lever is pressed backwards, the blind being arrested by a
stationary pin on the supporting bracket engaging with the ratchet wheel before
mentioned. When it is desired to raise or lower the blind it is effected by pulling
the cord outwardly which operates the cord lever and lifts the centre in the inclined
slot by the cam, by which the ratchet wheel is lifted out of contact with the stationary
pin, thus allowing of the movement of the blind at will. The opposite end of the
blind roller is fitted with a disc screwed thereto and provided with a centre which sits
in a suitable bracket with a circular or segmental opening provided with a stop or its
equivalent to prevent the same jumping out.

page_text: lock Fig. 3 is an end view showing the lever in position when raising or lowering
the blind, and Fig. 4 is a part plan showing the cord pulley, centre, ratchet wheel,
and fixing for supporting and arresting the same.
The blind roller A is made circular on which the blind is secured in any convenient
manner. On the end of the blind roller A is mounted the dished disc B, secured
thereon by the pin C when the latter is driven into the roller A as shown in
Fig. 4. To the centre pin C is secured the disc D, ratchet wheel E, and the
centre G, the latter working in the inclined slot H in the bracket I. The remaining
part of the pin C that is driven into the roller A is made squaro with grooved
sides as shown in Figs. 4, 5, and 6, the two latter figures being sections through the
lines A B and C D₁ respectively. The object of making the sides of this portion of
the pin C in the roller A square is to prevent the same twisting or turning by the
continuous strain the same is subjected to in raising and lowering the blind. The
dished disc or collar B is provided with a square hole and is mounted on the square
part of the centre pin C as shown in Fig. 4.
To the bracket 1 is pivoted the cam lever K by the pin Z. In the lower end
of the cam lever K is provided the hole L through which the winding cord M passes
to and from the cord barrel C when raising and lowering the blind.
When the blind is at rest and the cord. M hangs loosely the weight of the blind and
roller A causes the centre G to sit at the bottom end of the inclined slot H and on the
cam K, by which the lever K is pressed backwards, the blind and roller being
arrested by the stationary pin or projection N on the bracket I engaging with the
ratchet wheel E as shown in Figs. 1 and 2.
When it is desired to raise or lower the blind it is effected by pulling the cord M
outwardly, which operates the lever K and lifts the centre G in the inclined slot by
the cam K¹, thus removing the ratchet wheel E out of contact with the stationary pin
or projection N as in Fig. 3 which allows of the movement of the blind at will.
The opposite end of the blind roller A is fitted with the disc P screwed thereto :
the said disc having the centre S, which sits in the bracket W with the circular or
segmental opening O as shown in Fig. 7.
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 ―
1. The use of the pin C with the square or grooved sides, substantially as described
and as shown on the drawings in Figs. 4, 5, and 6 for the purpose specified.
2. In combination with a blind roller the use and construction of the pin C, discs B
and D, ratchet wheel E, and the centre G, substantially as described and as shown on
the drawings.
3. The combination of the bracket I with the slot H and projection N, and the
lever K with the cam K', substantially as and for the purpose set forth and as shown
on the drawings.
4. The combination and arrangement of parts forming my improved roller blind
furniture, constructed and operating substantially in the manner described and as
shown on the drawings.
Dated the 18th September 1888.
EDMUND CHADWICK,
Agent.