Spring Mounting for Window Blind Rollers.
Year: 1893

page_text: Date of Application, 4th July, 1893
Complete Specification Left, 22nd Mar., 1894-Accepted, 28th Apr., 1894
PROVISIONAL SPECIFICATION.
Spring Mounting for Window Blind Rollers.
JAMES ALLISON 44 North Street Manchester Square in the County of
Middlesex Upholsterer do hereby declare the nature of this invention to be as
follows:
-
An arrangement for raising and lowering window blinds. In carrying out this
invention I intend using two metal plates and between them put at the top a spindle
that will revolve with a square coming out of the front of one of the plates on this
spindle, and fastened to it, two small wheels one a rack and a catch, the other a
pinioned wheel. Fitted to this small pinioned wheel a larger pinion wheel
with a drum fixed to it, and revolving on a stationery spindle inside the
drum. A spring one end of it fixed to the spindle and the other end to the
rim of the drum. Two caps for the ends of the wood roller one to have a pin
projecting from it to be fitted to bracket, the other cap to have a square socket in
it, to fit to the square spindle at the top of the plate.
It will be seen by this arrangement, when the blind is fixed in its place, that by
pulling down the blind, you will wind up the spring and by raising the catch on the
rack wheel, the large wheel with the spring acts on the small pinioned wheel and
raises the blind.
I am not always going to use the rack wheel and catch, as sometimes we require
to keep the whole of the tension of the spring on the blind and when so the rack
will be of no use.
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
The combination of a large pinion wheel with a drum and spring inside to act on
smaller pinioned wheel to raise and lower blinds.
1
1000
JAMES ALLISON.
COMPLETE SPECIFICATION.
Spring Mounting for Window Blind Rollers.
JAMES ALLISON 44 North Street, Manchester Square in the County of
Middlesex Upholsterer do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
In carrying out this invention, I intend using two metal plates and between them
put at the top a spindle that will revolve with a square coming out at the front of
one of the plates on this spindle and fastened to it two small wheels one a rack and
catch, the other a pinioned wheel. Fitted to this small pinioned wheel a larger
pinion wheel with a drum fixed to it, and revolving on a stationary spindle inside
the drum. A spring one end of it fixed to the spindle and the other end to the rim
of the drum. Two caps for the ends of the wood roller one to have a pin projecting
from it to be fitted to bracket the other cap to have a square socket in it, to fit to
the square spindle at the top of the plate.

page_text: It will be seen by this arrangement, when the blind is fixed in its place, that by
pulling down the blind, you will wind up the spring and by raising the catch on the
rack wheel, the large wheel with the spring acts on the small pinioned wheel and
raises the blind.
I am not always going to use the rack wheel and catch, as sometimes we require
to keep the whole of the tension of the spring on the blind and when so the rack
will be of no use.
In the accompanying drawings
Figure I represents patent complete fixed in position but may be made larger or
smaller as required.
Figure 2 back metal plate, with large and small pinion wheels, shewing spring
and drum.
Figure 3 front plate shewing ratchet wheel and catch.
Letter A is blind roller.
Letter B is cap with socket to fit on to blind roller A.
Letter C is metal plates enclosing mechanism.
Letter D is spring to keep down catch E.
Letter E is ratchet wheel catch.
Letter F is spindle fitting into socket in blind roller cap B and carrying ratchet
wheel G and small pinion wheel H.
Letter G is ratchet wheel.
Letter H is small pinion wheel.
Letter J is spindle with spring attached carrying large wheel and drum.
Letter K is large cogged wheel with drum and spring.
Letter L is spring drum.
Letter M is spring fastened to spindle J and drum K.
Letter N is cover for spring drum L.
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 :-
A spring mounting for window blinds rollers.
Dated this 22nd day of March One thousand eight hundred and ninety-four.
AV
JAMES
ALLISON,
44, North Street, Manchester Square, Middlesex, Upholsterer.