Year: 1886

page_text: Date of Application, 13th Dec., 1886.
Complete Left, 1st Sept., 1887.
Complete Accepted, 4th Oct., 1887
I, WILLIAM JOHN OAKES of 118 Alma Street Aston in the County of Warwick
Manufacturer do hereby declare the nature of this invention to be as follows:-
This invention has for its object, the Construction and arrangement of what is
generally known as rack pulleys which are used for the adjustment of window blind
cords, in such manner, that simplicity is combined with efficiency and durability.
I construct my improved rack pulley as follows, The portion which is fixed, I
will term the fixed bar, is a plain bar of metal set down at each end, and pierced to
receive the usual screws for fixing, but is also pierced at each end to receive a locking
bar, upon the fixed plain bar. I place a carrier or slipper which carries the cord
pulley, said carrier is free to move upon the plain fixed bar, which may be of
rectangular or any approved section, I form upon the portion of the carrier, which
project upon the inside of the before mentioned fixed bar, two loops which engage a
oval bar of steel or other metal, which bar I call the locking bar, said bar passes
through the two holes pierced in the set down portion of the fixed bar before
mentioned and through the loops formed upon the projecting portion of the carrier
before referred to, the locking bar presses against the inner part of the fixed bar and
the inner part of the loops formed upon the carrier aforesaid, and locks the carrier
in the position where it may be placed, this is effected by the locking bar before
mentioned being turned in a rotary direction, in order that this may be easily effected,
I attach a milled knob or a suitable lever, or bend the portion of the bar extended
for that purpose, the lever etc., I propose to place at the lower part, the upper having
a washer rivetted thereon to secure the oval locking Bar in position, I also make the
oval locking bar with serrations or teeth formed thereon to engage with the
loops of the carrier aforesaid, in which case I name the locking bar, a locking rack
bar which effectually prevents any slip of the carrier when locked in position, upon
turning the serrations or teeth out of gear with the loops of the before mentioned
carrier, the said carrier is free to move for adjustment. I may also construct the
locking rack bar to move and be carried with the carrier, and forming a rack upon
the before mentioned plain fixed bar, or a plain locking bar carried upon the carrier
before mentioned, or any slight modification thereof, as and for the purpose set forth
and described.
1
1000

page_text: An Improved Rack Pulley.
I WILLIAM JOHN OAKES of 118 Alma Street Aston in the County of Warwick
Manufacturer do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
This Invention has for its object the construction and arrangement of what is
generally known as rack pulleys, which are used for the adjustment of window blind
cords, in such manner, that simplicity is combined with efficiency and durability.
I construct my improved Rack Pulley as follows, The portion which is fixed
(I will term the fixed bar) is a plain or ornamental bar of metal set down at each end
to receive the usual screws for fixing, but is also pierced at each end to receive a
locking bar, Upon the fixed plain or ornamental bar I place a carrier or slipper which
carries the cord pulley, said carrier or slipper is free to move upon the plain or
ornamental fixed bar which may be of rectangular or any approved section.
I form upon the portion of the carrier which projects upon the inside of the before
mentioned fixed bar loops which engage an oval bar of steel or other metal, said bar I
call the locking bar which may be plain or serrated, and presses against the fixed bar
and the loops of the carrier before mentioned, when, locked in the position required.
I also construct the slipper to carry a short locking bar of oval section which
engages a rack or series of. serrations formed upon the edge of the fixed bar
aforementioned.
In order that my invention may be more clearly understood as also the manner
in which the same is to be performed, I will now proceed to more particularly
describe my Invention having reference to the accompanying drawings, in which
similar letters refer to corresponding parts in the respective figures.
Fig. 1 represents the underside of my Improved Rack Pulley, according to the
first arrangement set forth.
Fig. 2 represents a side Elevation of Fig. 1.
Fig. 3 is a transverse section of Fig. 2 through the fixed bar a and locking bar E.
Fig. 4 is a plan of my Improved Rack Pulley, according to my second
arrangement.
Fig. 5 is a transverse section of Fig. 4 through the bar a and slipper b, shewing
locking bar G.
Fig. 6 is a side Elevation of Fig. 4.
The operation of my Improved Rack Pulley is as follows, The slipper b is made to
move freely upon the bar a when the locking E has its cam portion G out of gear
with the loops formed upon the under side of b, to lock the slipper in the position
required the locking bar E is moved by means of the lever E' into the position
indicated in Fig. 3 when the serrations at G engage with the loops or horns formed
upon the slipper b, the lever E¹ has a stop portion formed upon the heel of same at f
to prevent turning the locking bar too far as also to lock the same to prevent it
working loose when the cord is being worked upon the pulley C.

page_text: The locking bar is secured in the ends of the fixed bar a at where it is set down for
the fixing screws by a washer, and having its ends rivetted down over as shewn in
figs. 1 and 2.
To release the slipper b which carries the cord pulley C (which is free to move
upon a suitable stud secured in the slipper b) the lever E¹ is moved until the cam G
is out of gear with the loops on 6 when the slipper b is free to move where desired.
According to my second arrangement the cord pulley C is carried upon the slipper b
in a similar manner to that in Fig. 1 and Fig. 2, the slipper 6 is also free to move
when the cam G is out of gear with the serrations or teeth which I form upon the
edge of the fixed bar a, the locking bar E is a short one as shewn in figs. 4 and 6
and is secured by a pin or rivet to the horns which are formed for that purpose on
the slipper b, to lock the slipper in the position required the locking bar E is
moved by the wing or lever which is formed thereon into the position indicated in
Fig. 5 and Fig. 6 when the serrations or teeth forming the cam portion G engage
into the corresponding teeth or serrations formed upon the bar a, the teeth G on lock
bar E stop against a portion of the slipper which prevents the bar E being moved
too far..
My Improved Rack Pulley can be made plain without the serrations or teeth if so
desired, but I prefer the serrations as shewn in the accompanying drawings as the
safest, most certain and reliable in action.
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 locking bar Plain or serrated, in a Rack Pulley, as shewn in the accompany-
ing drawings Figs. 1 to 3, as also the method of operating the same substantially
as herein described and set forth.
2. The locking bar Plain or serrated, as also the serrations in the edge of the fixed
bar as shewn in figs. 4, 5 and 6 of the accompanying drawings, substantially as
herein described and set forth.
Dated this 30th day of August 1887.