Improvements in Pulleys Used in Actuating Window Sashes, Doors, Shutters, Partitions, and the like.
Year: 1895

page_text: Date of Application, 26th Oct., 1895
Complete Specification Left, 27th July, 1896-Accepted, 13th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Pulleys Used in Actuating Window Sashes, Doors,
Shutters, Partitions, and the like.
RICHARD HOLT 16, Walnut Street Southport, Architect and Surveyor, do
hereby declare the nature of this invention to be as follows:-
This invention consists of the pulley being hung or centered by its axle resting
on the peripheries of two wheels placed on one side of the pulley and on the
peripheries of two similar wheels placed on the other side of the pulley, and these
four wheels are pivoted in the frame inside which the pulley is placed.
Or, the axle of the pulley may rest on the periphery of two wheels only,
one wheel on one side of the pulley and one wheel on the other side of the
pulley.
To keep the pulley from rolling off the periphery of the wheels either guides or
rollers are employed which engage against the axle of the pulley.
Dated this 25th day of October 1895.
RICHARD HOLT.
Improvements in Pulleys Used in Actuating Window Sashes, Doors,
Shutters, Partitions, and the like.
I, RICHARD HOLT, of 16, Walnut Street, Southport, in the County of
Lancaster, Architect and Surveyor, 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 relates to pulleys for window sashes, doors, shutters, partitions
and the like; and has for its object to minimise friction and so render the movement
of the said structures more facile.
The invention consists in mounting the rotating axle of a sliding window sash
cord-pulley, or the running wheel of a travelling door, shutter, partition and the
like, upon the peripheries of two wheels of larger diameter than said axle, whose
common aud rotating axle is journalled in the pulley or wheel frame in the same
vertical plane as said pulley or wheel axle.
In order to retain the cord-pulley (or running wheel) axle in its central position
on the peripheries of its supporting wheels, I dispose it in slots or grooves formed
in the pulley frame; or, to minimise friction at this point, I may employ anti-
friction rollers upon the pulley frame, against which the said axle rotates.
In the accompanying drawing I have shewn the application of this invention
to the cord-pulley of a vertically sliding window sash, Figure 1 being a side
elevation of the pulley frame, Figure 2 a front elevation, and Figure 3 a section on
line A. B., Figure 2.
A denotes the pulley frame; B the sash cord-pulley; C the supporting wheels.
It will be seen that the axle b of the cord-pulley B is mounted vertically over the
axle c of the wheels C and so that it makes rolling contact with the peripheries of

page_text: the wheels C, whose common and rotating axle c is journalled in the frame A. In
order to retain the pulley B in its central position on the wheel C its axle b may
project through slots a in the frame A, or may be disposed in grooves formed in
the inner surface of the frame A; or I may provide two pairs of anti-friction
rollers a' for this purpose and dispose one pair on each side of the axle b, the
rollers a¹ being journalled on pins formed or fixed in the frame A, as shewn in dotted
lines in Figure 1.
It will be seen that by mounting the axle of the pulley B vertically over the
axle of the wheels C, the pulley B will make a number of revolutions as compared
with the axle of the wheels C with a minimum of friction on the axle of the
pulley B, which friction may be further reduced by the anti-friction rollers a¹
above described.
Although I have described the application of my invention to the vertically
sliding sashes of a window, it must be understood that its employment for shutters,
and doors, partitions and the like which travel vertically or horizontally, is equally
applicable and contemplated by me.
In applying the invention to horizontally travelling doors and the like, 1 cause
the rotating axle of its running wheel to make rolling contact with the peripheries
of a pair of wheels whose common and rotating axle is journalled vertically in
respect of such running wheel, and the axle of the running wheel may be disposed
in grooves or slots in the wheel frame or be provided with anti-friction rollers in
the manner above described.
Instead of making the pair of wheels C one with their axle (forming in effect a
double wheel) I may mount these wheels loosely upon a fixed axle which is common
to both wheels, or each wheel C may have a separate axle or pin which is formed or
fixed in the frame A. In all cases however the axis of the wheels C lies in the
same vertical plane as the axis of the pulley B.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:-
1. Mounting the rotating axle of a sliding window sash cord-pulley, or the
running wheel of a travelling door, shutter, partition and the like, upon the
peripheries of two wheels of larger diameter than said axle, whose rotating or fixed
axle or axles is or are journalled or fixed in the pulley or wheel frame in the same
vertical plane as said pulley or wheel axle, substantially as and for the purpose
hercin set forth.
J. A. COUBROUGH,
Registered Patent Agent (qual. by exam.),
10, St. George's Crescent, Liverpool, Agent for the Applicant.