IMPROVEMENTS IN ATTACHMENTS FOR HOLDING AND RELEASING SPRING ROLLER BLINDS
Year: 1884

page_text: I MATTHEW HENRY ROBOTTOM of "The Cottage" Shustoke in the County of
Warwick, Watch Manufacturer, do hereby declare the nature of my said invention
for IMPROVEMENTS IN ATTACHMENTS FOR HOLDING AND RELEASING SPRING ROLLER
BLINDS to be as follows:―
"
The object of my invention is to provide simple durable and neat attachments
without projecting levers cords or other objectionable protruding parts which shall.
securely hold roller and blind when the latter is fully lowered or raised or at any
intermediate position, and shall allow of release from any point.
The attachments consist essentially in the employment of the three parts here-
after described; the first of the three namely a lever adapted to engage a rack
friction surface or other device such as has heretofore been used with spring roller
blinds. The springs in or connected to the blind roller are of helical coiled or
other form.
The said attachments are the lever named which is jointed or pivotted to the
window frame or a stationary side. piece; the end of this lever engages with a
toothed wheel a rack or bears against a friction race on the roller. The second is
a helical, curved or elliptical spring bears against the lever and keeps it in gear
with the toothed wheel or rack, or against the friction race. The third part is a
pressure button which is arranged to bear on the lever at will to move the latter
away from the roller rack or race and thus allow the spring to turn the roller and
raise the blind.
Modifications may be made under my invention, but there are always the three
parts above described or their equivalents acting with the spring roller.

page_text: COMPLETE SPECIFICATION,
Improvements in Attachments for Holding and Releasing Spring
Roller Blinds.
I MATTHEW HENRY ROBOTTOM of The Cottage Shustoke in the County of
Warwick Watch Manufacturer do hereby declare the nature of the said invention
for "IMPROVEMENTS IN ATTACHMENTS FOR HOLDING AND RELEASING SPRING ROLLER
BLINDS" 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 my invention is to provide simple durable and neat attachments
without projecting levers cords or other objectionable protruding parts which shall
'securely hold the roller and blind when the latter is fully lowered or raised, or at
any intermediate position, and shall allow of release from any point.
The attachments consist essentially in the employment in combination of the
three parts hereinafter described. The first of the three namely the lever is jointed
or. pivotted to the under frame, or to a stationary side piece, and has one end
adapted to engage with a toothed wheel or rack, or to bear against a friction race
on the roller or to act on equivalent devices such as have heretofore been used with
spring roller blinds. The second part consists of a helical curved or elliptical spring
which bears against the lever and keeps it in gear with the toothed wheel or rack,
or against the friction race or other device. The third part is a pressure button or
its equivalent which is arranged to bear on the lever at will to move the latter
away from the rack or race, and thus allow the spring to turn the roller and raise
the blind. The spring which I prefer to use for raising the blind consists of steel
wire coiled in a helix around a central spindle; other forms of coiled springs may
be used.
Modifications may be made under my invention, but there are always the three
parts above described or their equivalents combined and acting with the spring
roller,
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a transverse section, and fig. 2 a longitudinal section of a spring blind
roller and attachments, under my invention, a window frame, b roller bearings..
o roller axle, d hollow cylindrical roller free to revolve on the axle c, e helical
spring, one end of which is attached to the axle c and the other to the roller d.
The axle c carries reverse ratchet wheels fg, and the blind roller is fitted with a
pawl which takes into. the teeth of the ratchet wheel g. i lever one end of
which is attached to a pawl j hung on the roller bearing 6 and arranged to take
into the teeth of the ratchet wheel f. The other end of the lever is made into a
spring, and is attached to the window. frame. a. k pressure 'button for acting on
the lever . The action is as follows:-When the blind is drawn down the roller
alone revolves, and the spring e is coiled up: When the blind is released the pawl h
takes into the teeth of the ratchet wheel g and prevents the blind roller from
revolving, as the said ratchet wheel is held stationary by the pawl j and ratchet
wheelf. When it is desired to raise the blind, the button k is pressed, the pawl j
is disengaged from the teeth of the ratchet wheel f, and the blind roller is free to

page_text: revolve round the axle c. The axle b is prevented from revolving at any time by
being made square ended and fitting into square holes in the bearings b or it is
otherwise secured,
It will be evident that the lever inay be pivotted at one end or between the ends,
and that a separate spring may be used to hold it in position instead of one of its
ends being made into a spring.
Fig. 3 is a transverse section, showing spring blind roller attachments under my
invention in which a friction race is used and in which the lever acts on a
friction clip m.
•
•
Fig. 4 is a transverse section of, a further modification of spring blind roller
attachment under my invention in which a cord n instead of a pressure button is
used to actuate the lever and clip.
Having now particularly described and ascertained. the nature of my said
invention, and in what manner the same is to be performed I declare that
what I claim is
Spring blind roller attachments consisting of lever and connections, a spring
acting on the lever, and a pressure button or its equivalent combined substantially
as set forth.