Year: 1886

page_text: I ARTHUR ERNEST WYNN of Craiglands, Ilkley near Leeds, Mechanical Expert,
do hereby declare the nature of this invention to be as follows:-
Window blinds hung on a roller at the top of the window, are generally wound
up or down by means of an endless band or cord; this endless band or cord is
passed over a pulley fixed at the end of the roller upon which the blind is hung
and also round a pulley fixed lower down on the window frame, and within reach
of any one wishing to wind the blind up or down. My invention has reference to
this bottom or lower pulley; this is generally fixed and if the endless band or cord
stretches, which it frequently does, it becomes too slack to actuate the top roller,
my invention consists of using a knob instead of a pulley, and attaching this knob
to the window frame by 'a spring or peice of India rubber in such a manner that
if the cord stretches the spring or India rubber will instantly pull the knob further
away from the top roller and thus take up the slack of the cord and keep it tight.
enough to actuate the top roller.

page_text: I ARTHUR ERNEST WYNN of Craiglands Ilkley near Leeds in the County of
Yorkshire Mechanical Engineer do hereby declare the nature of my invention for
"IMPROVEMENTS IN ROLLER BLIND FITTINGS" and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
Window blinds hung on a roller at the top of the window are generally wound.
up or down by means of an endless band or cord, this endless band or cord is
passed over a pulley fixed at the end of the roller upon which the blind is hung
and also round a pulley fixed lower down on the window frame and within reach
of any one wishing to wind the blind up or down. My invention has reference to
this bottom or lower pulley. This is generally fixed a certain distance from the
top pulley and can only be altered by taking the screws out which fix it to the
window frame and screwing it in a fresh place, so that if the endless band or cord
stretches, which it frequently does-it becomes too slack to actuate the top roller.
My invention consists of using a knob that will not revolve instead of a revolving
pulley, this knob is fixed on to a plate having a projection (A on sketch): to this
projection is fixed a spiral spring (B on sketch) or india Rubber, and the other end
of the spiral spring or India Rubber is fastened to the window frame. The window
cord is then made of such a length that when it is passed over the knob the spiral
spring or India Rubber is stretched out, the cord is by this means kept tight, as
the spiral spring or India Rubber is always pulling the knob away from the top
pulley, so that when the cord stretches, the spiral spring or India Rubber pulls the
knob further away from the top pulley, and thus keeps it (the cord) tight
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,
1. The use of a knob that will not revolve, instead of a revolving pulley,
fastened on to a plate, with a projection or other arrangement for fastening it to
a spiral spring or India Rubber.
2. The use of a spiral spring or India Rubber (I use a spiral spring by preference)
in expansion to pull the knob away from the top pulley and thus keep the cord
tight.
By expansion I mean that when the spiral spring is in use its coils are pulled
apart and its tendency is to bring its coils together.
Dated this 10th NL