Year: 1887

page_text: Date of Application, 1st Apr., 1887
Complete Left, 2nd Jan., 1888
Complete Accepted, 9th Mar., 1888
WILLIAM FRASER, Engineer 49 Oxford Road, Finsbury Park, London, N., do
hereby declare the nature of this invention to be as follows:-
The rack has a double row of teeth one row on each side the teeth on the one side
being double the depth of that on the other. But both row of teeth is the same
length. The cord pully runs upon a hollow tube or shaft & is kept in its place by the
shaft end being considerably larger in diar. than said pully at one side & the top
plate of the rack keeps it on the other side. There is a small recess a little larger in
diar. than the pully in the Thumb piece or end of the pully shaft. Said recess
being sufficintly deep to allow of a spring & to give suffieint shift to throw the
pinion on the end of the pully shaft out of gear with the teeth on the one side & to
remain in gear with the teeth on the other side. When the cord is requiring
Said
tightning by pressing the Thumb piece or outside end of the pully shaft.
shaft having a small pinion on the end of it & passing through the pully freely throws
the pinion out of gear with the teeth on the one side & remains in gear with the teeth
on the other side. Thus by revolving (as well as pressing) the end of the pully
shaft, the pinion travils in whatever direction it is revolved thus tightning or
slackning the cord at will. The moment the pressure is relaxed by the action of a
spring between the outside of the cord pully & the end of the recess in thumb piece.
The pinion on the pully shaft is drawn back again into gear with both row of teeth &
thereby becomes lockfast. There is two shifting studs wrought by means of a
screwed pinching pin with a taper point which works up the centre of the pully
shaft by screwing up said pin the two studs are sent right & left through the pully
shaft & thus tightens the pully to whatever extent required. 1.E. if the blinds are
left at any given distance up no matter what weight they are by tightning the pully
on the axle (by means of the pin & studs) it thus acts as a brake on the pully which
is prevented from revolving & the cord if tight prevents the blind roller froin revolving
by the weight of the blind upon it. I will now give a fuller description of it.
The pully, C, is a loose pully & runs upon the shaft B the outside end of the shaft is
a little larger in diar. than the diar. of the pully C. B, is a hollow tube or
shaft with a recess in it marked, E. A, is a spring which works in recess, E, & is

page_text: compressed by pully, C, when B, is pressed, recess, E, being sufficiently deep to allow
of the necessary shift required to throw pinion, F, out of gear with teeth, H. 1, & J,
are the top & bottom plates resply. K is a screwed pinching pin with tapered
point. I is the shifting pins or studs which stops by friction the pully, C, from
revolving when K is screwed hard up in, B.
When, B, is pressed pinion, E, being attached to the shaft end of B, & passing freely
through pully, C, is thrown out of gear with the teeth, H on one side, then by keeping
pressing & revolving B, also the pinion F being still in gear with teeth, G, travels in
whatever direction it is revolved & as soon as the pressure is relased. Spring A, in
recess in recess, E, draws, B, & pinion, F, back into gear with the teeth, H, & G, on
both sides, by screwing K, studs, D, are pressed right & left, through shaft, B, & thus
retards the action of pully, C, to the extent required for preventing the blinds by
their own weight from coming down.
Claims.
First. To have teeth on both sides, one side being double the depth or thereby of
that on the other, for the purpose of throwing the cord pully shaft out or into gear
with the teeth on one or both sides, & to cause the pully shaft to travil or become
lockfast at will.
Second. To have a hollow or soled pully shaft with a spur pinion on the end to gear
with teeth on one or both sides of any depth screwed externally or internally.
Third. To have a recess with a spring of any kind in the Thumb piece of the pully
shaft for the purpose of throwing out or into gear at will the pully shaft with teeth,
or teeth of any kind.
Fourth. To use said rack for all kind of blinds for window purposes or otherwise or
wherever cord racks are required.
Fifth. To have a screwed pinching pin with taper point & shifting stud or studs of
any kind whatever.
1
1000

page_text: 21, WILLIAM FRASER of 49 Oxford Road, Finsbury Park, London, N., Engineer, 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, which relates to improvements in cord racks for window blinds,
has for its object, to so construct the said racks, or cord holders, that on the cap being
released, the adjustable device, automatically fixes itself.
This invention, consists essentially of a rack frame, provided with a long gap or
opening, through the front thereof, and wherein a pulley carrying pin, or axis moves,
both laterally and longitudinally. This pin or axis, carries at its inner end, a fixed
pinion or toothed wheel, while its outer end, is provided with an underside sunken
cap, between which, and the rack frame, a loosely working pulley is disposed.
The pinion, on the inner end of the pulley axis, engages when in its fixed position,
with a double rack, disposed on the two opposite inner sides of the framing part, but
when the cord holding appliance is out of action, or in its adjustable position, then the
pinion engages with the teeth of one rack only, as it has been removed from the other
rack, by an inward motion; and when in this position, the pinion, and parts carried
by its axis, is allowed to revolve, and be adjusted to any desired position.
The rack teeth upon one side, of the rack body part, ure of double the breadth as the
rack teeth upon the other side; so that the pinion when in its fixed position, locks
within the teeth of both racks, but when out of action, or in its pressed back position,
it only engages with one of them.
Figure 1 represents in front elevation, an automatic cord holding rack, or rack
pulley, constructed according to my invention.
Figure 2 is a side elevation of the same, with the cord shown in section; and
figure 3 represents a horizontal vertical section of the said rack pulley, upon the dotted
lines A B figure 2.
Figure 4 is also a horizontal vertical section of the said rack pulley, upon the
dotted lines CD figure 2.
Figure 5 is a transverse section upon the dotted lines E F figure 2, and figure 6 is
the same, but with the pinion out of action, ready for the cap end, and parts carried
by the pulley axis, to be adjusted to any desired position.
Figure 7 is an edge view of the pulley, pinion, and cap separately.
Figure 8 shows a plan of the rack frame.
The same letters of reference, indicate corresponding parts in the several figures of
the drawing.

page_text: a is the rack framing, with a gapped, or open front a², wherein the pulley axis b, of
a pulley c, works, both laterally, and longitudinally.
The axis b, carries fast upon its inner end, a pinion, or toothed wheel d, which
engages with the teeth of two opposite inside racks e, f, disposed on the two opposite
sides of the rack frame a.
The other, and outer end of the pulley axis b, has a fixedly secured cap g, whose
underside is sunken or recessed, and wherein, and around the pulley axis, a spring h
is disposed.
The rack teeth, on the one side of the rack frame, are about double the breadth,
or depth from front to back, as the other side e; that is, the rack teeth f, extend
through nearly the whole depth from front to back of the frame, while the other side
only extends from front, to about the middle of the side, leaving the other part,
between the middle, to the back, plain.
e,
The pulley e, loosely turns upon the axis b, and takes its bearing, upon the face of
the rack framing.
When a cord is fixed, as in the positions figures 1 and 2, the pinion d, or rather
the teeth of the pinion, are locked within the teeth of the two opposite racks, thereby
rendering the axis, which carries the pulley and cap, immovable; and which said
position, is retained by the action of the spring h, pressing outwardly, the cap, and
stem, carried by it.
On the pulley's position, requiring to be changed, for the tightening of the cord i, or
otherwise, press inwardly the cap g, when the pinion at the end of its carrying axis, is
taken from the teeth of the rack e, and with its teeth engaging only with the rack;
and when in this position, as in figures 4 and 6, a revolving, or turning movement,
given to the cap, rolls the pinion, up or down the said rack, to any position as may
be required.
On pressure being relieved from the cap and axis, the spring h, automatically takes
the pinion into gear with both racks, which thereby becomes locked, as in
figures 1, 2, 3 and 5.
Thus, by combined pressure and rotation, the pulley axis can be adjusted, and
automatically affixed in position, as aforesaid."
Instead of rack teeth being broader upon one side, than upon the other side, I may
make them both of a like breadth, as indicated by the letter e, in the preceding
figures so that the racks upon the two opposite sides, extend only from front, to
half way across the sides; so that the cap and pulley carrying axis in this form, only
requires to be pressed inwards, without rotation, to effect the necessary adjustment ;
so that the pinion is disengaged from both racks, and when free, it allows the pulley
axis to be moved up or down, and adjusted.
Or the converse action may be obtained, by placing the racks near the base, or from
the middle to the back of the sides, and disposing the spring between the top side of
the pinion, and the underside of the front of the rack framing, by which means, the
pinion is pulled outwardly, for disengagement with the rack teeth, instead of being
pressed inwardly.
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.-
First. In an automatic lock fast cord rack, or rack pulley. Providing the two
opposite and inner sides, of a rack pulley frame, with racks, of which the teeth of one
side, are broader from front to back than the teeth on the other side, and with which
said rack teeth, which are marked e, f, a spur pinion, or a spur wheel, carried on the
inner end, of a pulley carrying axis, engages, substantially as, and for the purpose, as
herein described and set forth.
· Secondly. In combination with a pulley frame, with inside rack teeth e,, of
dissimilar breadths, of a pulley axis b, spur pinion or wheel d, loose turning pulley c,
and cap or thumb piece, with spring, disposed between its sunken inner side, and
the top outside face of the loose working pulley as aforesaid;-substantially as described
and set forth.
2 J

page_text: Thirdly. A rack pulley, or cord rack, consisting of rack framing, with opposite
inside racks, of equal breadth, in connection with a pulley axis b, pinion d, loose
pulley c, cap g, and spring h, substantially as described; whereby the holding means
is released, by a pulling out and sliding action.
Fourthly. A rack pulley, with rack teeth, upon its two opposite inside edges, in
combination with a pulley axis, loose pulley, pinion, and cap or thumb piece, and with
a spring disposed between the pinion, and inner side of front of rack framing, as
described.
Dated this Thirty first day of December 1907