Year: 1887

page_text: Date of Application, 10th- Aug., 1887
Complete Left, 10th May, 1888
Complete Accepted, 15th June, 1888
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 is for a novel and improved construction of what is commonly
known as ruck pulleys, which are used for the adjustment of window blind cords, I
construct and arrange my improved rack pulley as follows.
I form the slipper or Guide carrying the pulley out of sheet metal, to clip a bar
upon which it moves easily by hand, the bar is formed out of strip metal plain or
ornamental, said bar may be varied in sectional form also, the ends of said bar are
secured by a locking bolt or bar which gears into the before mentioned slipper when
locked in position.
Said locking bar or bolt also secures the retaining ends which are pierced to recieve
the screws required to fix the same to casement or frame of window.
The aforesaid locking bar or bolt has a projecting portion formed thereon its entire
length which engages the slipper when in position, the said projecting portion may
be formed of cam form plain or notched, or having teeth formed thereon similar to a
rack, the said locking bar may be formed of any suitable material, iron steel or brass
as desired.
The sliding bar upon which the pulley slipper runs has a cam formed at each end.
which locks the said bar when brought into the position desired to adjust the cord,
said cams lock upon the retaining ends which are held rigid by the locking bolt or
bar before mentioned and secured by screws to the window frame or casement as before
described.
To operate the rack bar, the slipper or pulley carrier is moved side ways as also
the slipper bar with it, untill the slipper is moved out of gear with the locking bar,
when the sliding slipper is free to be moved in either direction, to secure it rigid in
the position required the slipper and bar is moved back again upon the locking har
when it is locked and remains rigid in the position required.

page_text: According to another arrangement I may form the sliding and locking bar in one
piece of circular form having suitable inclines formed thereon for locking the slipper,
said bar to be secured in any suitable manner either by a lock bolt, or having suitable
means provided for attaching the fixing ends thereto or they may be formed in one
piece therewith as and for the purpose described and set forth.
Thus the operation of adjustment of the cord pulley which works upon a stud in the
slipper before mentioned, can be effected by one hand in a simple and effective manner
as described and set forth.
Dated Oth dose of Aument 1007

page_text: 1, WILLIAM JOHN OAKES of 118 Alma Street Aston in the County of Warwick manu-
facturer lo 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:-
I construct and arrange my improved Rack Pulley as follows.
I form the slipper or Guide carrying the pulley, out of sheet metal, to clip a bar
upon which it can be easily moved, said bar may be formed out of strip metal plain
or ornamental, and may vary in sectional form also, the ends of said bar are secured
by a locking bolt or bar, which gears into the before mentioned slipper, when said
slipper is locked in position, the said ends of bar are pierced to recieve the screws
required to fix same to casement or frame of window.
The sliding bar and slipper moveing thereon are locked simultaenously, by the
before mentioned locking bar, and a cam formed upon each end of the sliding bar
locking upon the retaining ends, in such manner that one movement enables the
before mentioned slipper to be secured or moved into the desired position.
In the second arrangement I form the sliding bar and locking portion in one,
and form suitable inclines or teeth thereon to engage with the pulley slipper or Guide,
which is provided with corresponding teeth or inclines for the purpose, in such
manner that a semi rotary movement in one direction causes the teeth or inclines to
become disengaged, which allows the slipper or Guide before mentioned to be moved
in the desired position, and a semi rotary movement in an opposite direction, causes
the before mentioned teeth or inclines to become engaged and locked, and the before
mentioned slipper is secured.
In order that my Invention may be more clearly understood I will now proceed to
more particularly describe the same having reference to the accompanying drawings.
Fig. 1 represents a plan of my improved rack pully complete, Fig. 2 is an eleva-
tion of Fig. 1.
Fig. 3 is an enlarged section shewing the locking arrangement for sliding bar.
Fig. 4 is an enlarged section shewing locking arrangement of pulley slide.
Fig. 5 is a plan of my improved rack pulloy, according to my second arrangement.
Fig. 6 is an elevation of Fig. 5.
Fig. 7 is an end elevation of Fig. 6 shewing locking inclines or teeth in position.
The drawings represent the slipper band pulley c locked in position, it will be seen
in Fig. 2 that the slipper b engages the locking bar or bolt e by the horns 1,
which are formed as shewn at fi. in Fig. 4, the retaining ends are secured by
the locking bare by rivetting the same over as shewn, or in any suitable manner, the
inner portion of h forms a locking stop for G Figs. 2 and Fig. 3 which is formed in
one with the bar a.
The cord pulley c is secured in the usual manner by a rivet and cap d to the
slipper b.

page_text: By a movement to the right in an horizontal direction it will be seen by referenc
to fig. 3 and fig. 4 that the inclines g and the teeth on the bar e, and corresponding
inclines, and teeth f on slipper b will become disengaged; and slipper 6 will be free to
move, the locking bar e remains a fixture being secured to the retaining ends h in
the manner before described, in order to lock the slipper b in the position shewn
Fig. 1 and Fig. 2 move the bar a carrying the slipper into the position indicated.
The bar a in Fig. 5 has a series of inclined teeth or serrations formed thereon,
which engage suitable teeth or serrations formed upon the inner face of the slipper b,
which carries the cord pully c secured in the usual manner.
b
Upon moveing the slipper b in a semi rotary direction on the bar a to the left hand
as shewn in Fig. 7, the teeth or inclines fe will become disengaged the teeth f on
slipper coming into the clearance space i formed to recieve them, when the slipper b
will be free to be moved in either direction upon the bar a, upon moveing it again
into the position indicated, in Fig. 7 the teeth or inclines f, e, become again engaged,
and by a slight pressure become locked, and the slipper b is secured in position.
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 construction and arrangement of a rack pulley as described and set forth
having reference to the drawings Figs. 1 to 4.
2. The locking of the bar a and the slipper 6 by one movement substantially as
described and set forth having reference to the accompanying drawings.
3. The construction of a rack pulley as shewn Figs. 5, 6 and 7, of the accompanying
drawings substantially as herein described and set forth.
Dated this 9th day of May 1888.