Improved Window Blind Fittings.
Year: 1899

page_text: Date of Application, 10th Oct., 1899
Complete Specification Left, 18th Jan., 1900-Accepted, 3rd Mar., 1900
Improved Window Blind Fittings.
ETHELBERT WAREHAM, No. 1, Ivy Dene, Goldlay Road, Chelmsford, Essex,
Watchmaker, do hereby declare the nature of this invention to be as follows:
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My invention relates to an improvement in window blind fittings its object
is to keep the cord which draws up the blind at a regular tension, and it is
arranged so as to adjust itself to the conditions of the cord. I prefer that my
device be an oval metallic cup, having flanges at its two sides with screw holes
in them, at the bottom of the cup is a slot cut through the mettle, through which
protrudes a lever, the end of the lever inside the cup has a hole in it, through
which passes a pin horozontally from one end of the cup to the other, and is
integrally fixed to the cup, on the outer end of the lever is an ordinary roler used
in blind racks or pulleys, the lever is pressed down to the bottom of the slot
by means of a spiral spring fitted round the pin, and the end of the spring pressing
down the lever, by this means holding the cord down at a regular tension
when it is passed round the pulley, my device can be made in several different
ways on the same principal and if desired can be made from one piece of spring
metal.
Dated this 8th day of October 1899.
COMPLETE SPECIFICATION.
Improved Window Blind Fittings.
- I, ETHELBERT WAREHAM, of No. 1, Ivy Dene, Goldlay Road, Chelmsford,
Essex, Watchmaker, 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:-
My invention relates to an improvement in window blind fittings or what is
usually called, window blind cord racks, the object of which is to provide means
whereby to adjust the cord, so that the stretching and shrinking usually caused
by atmispheric and other effects shall be overcome so that the cord can be kept
at a regular tension.
In the accompanying drawing Fig. 1 is a perspective of the blind cord pulley
attached to a window frame, and connected to an ordinary blind roler by means of
a blind cord.
Fio is an elevated side section.

page_text: Figs. 4, 5, 6, 7, 8, 9 are sections showing the different forms in which the
device can be constructed if desired.
The basis of my device consists in a cup A, with lugs D, D, holes B and
slot C, to which is attached lever E by means of pin G passing through
holes B, B, and hole K in the lever E, lever E protrudes through slot C and at
the outer end of lever E is attached a small roler F, round which passes the
blind cord, a spiral spring I encircles pin G the two outer ends of the springs
being held in position by means of lugs H, H, or their equivalent, the inner
ends of the spring pressing on the lever E as described in Figs. 1, 2, 3. In
Fig. 8 simular results are produced by making the device of one or more pieces
of spring metal.
The action of the device is as follows, in its normal condition spring I forces
lever E to the bottom of slot C and holds lever E in this position untill required for
use, when using raise lever E to the top of slot C and place the blind cord round
roler F, the lever then being pressed down by spring I endeavours to return
to the bottom of of slot C and in so doing keeps the cord taut.
I find by experience that the failure in the ordinary rack is caused by atmas-
pheric effects on the cord and I have therefore constructed my device so that
it will adjust itself to any condition of the cord thereby preventing injury to the
fabric I am aware that prior to my invention means have been divised for a
self adjusting pulley but such devices are on a different principal and of an
expensive nature and does not fully answer the requirements.
Having now particularly described and ascertained the nature of my invention,
and in what manner the same is to be performed I declare that what I claim is:
No. 1. The self adjusting blind cord pulley as showen in Fig. 1 and Fig. 8.
2. The combination of a cup A with slot C holes B, B, and lugs D, D and H, H.
3. The combination of a cup A lever E spring I pin G roler F.
4. The combination of lever E pin J and roller F.
Dated this 18th day of January 1900.
ETHELBERT WAREHAM,
1, Ivy Dene, Goldlay Road, Chelmsford, Essex.