IMPROVEMENTS IN BLIND FURNITURE
Year: 1884

page_text: :
WILLIAM SANDERSON of 1 Lewis St. Gateshead Moulder and THOMAS
ALEXANDER MOFFITT of High St. Gateshead Ironmonger do hereby declare the
nature of Willian Sanderson's Invention for IMPROVEMENTS IN BLIND FURNITURE
to be as follows:-
J.
My Invention has for its object to work the blind by means of an endless cord
at any angle without the intervention of a bottom guide and to retain, the blind
in any position. accomplish this by means of an endless cord passing over a
grooved or V sheave on the blind roller on the periphery of which there are
notches for pall action. A balanced pall is fixed below the sheave, through this
pall both sides of endless cord are passed and work through a slot about the
middle of pall in such a way as to move the pall out of gear and draw the blind
down draw it up. The pall being pivotted near its centre or between the pall
tooth and balance on opposite end, when the cord is relaxed then the balance
throws the pall up into contact with the notches in sheave on blind roller and so
retains the blind in any position in which it may be left. A roller to reduce the
friction of cord may be placed at one side of the slot in the pall.
t

page_text: WILLIAM SANDERSON of 1 Lewis Street, Moulder and THOMAS ALEXANDER
MOFFITT of High Street Ironmonger, both of Gateshead-on-Tyne do hereby declare
the nature of our Invention for IMPROVEMENTS IN BLIND FURNITURE and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
Our Invention has for its object to work the blind by means of an endless cord
at any angle without the intervention of a bottom guide, and to retain the blind
in any position.
We accomplish this by means of an endless cord passing over a grooved or
V shaped sheave on the blind roller on the periphrey of which are three notches.
for pawl action. A balance pawl is fixed below the sheave and both sides of the
endless cord work through the middle of this pawl in such a way as to release it
from the teeth by friction and draw the blind up or let it down so that it will remain
in the position in which it is left. A roller to reduce the friction may be placed
on one side of the pawl. The pawl is made to engage in the teeth of the sheave
by being extended and weighted so that the non-working end shall outweigh the
working end.
In the accompanying Drawings
Figure 1 is a side elevation.
"
2 is an angular view.
93
3 is a plan of the pawl.
A is the endless cord passing over the grooved or V shaped sheave B by which
the blind is worked up and down.
For the purpose of stopping the blind in any position the above sheave has cut
on its periphrey notches or teeth b' resembling ratchet teeth, into which a pawl D
(pivotted at on the bracket E and brought into action by its own weight)
engages; the said pawl being released from the notches or teeth by the friction of
the cord A on the pawl D, as the blind is being worked down, one side of the cord
working on one side of the pivot d' of the pawl D, and the other side of the cord
on the opposite side of the pivot, so that the friction on either side as the blind is
being lowered has a tendency to release the pawl from the teeth, after which the
blind may be drawn down the distance required also immediately the hand
⚫ releases the cord A the weighted end of the pawl D causes its point to engage in
the teeth of the sheave and so holds it fast. A roller F to reduce the friction of
cord may be placed on one side of the pawl.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is
1. The pawl and endless cord the latter working by friction on either side the
pivot of the pawl for the purpose of releasing it from the ratchet teeth as
substantially set forth.
2. The pawl and endless cord the latter working by friction on either side the
pivot of the pawl for the purpose of releasing it from the ratchet teeth and being
weighted at the non-working end so that it will re-engage the teeth of the sheavo
immediately the cord is released.
3. A. blind sheave having the ratchet like teeth in combination with a pawl and
endless cord the latter working by friction on either side the pivot of the pawl for

page_text: the purpose of releasing it from the ratchet teeth, and the pawl being weighted
at its non-working end to enable it to engage in the ratchet teeth of its own
weight.