Improvements in and relating to Window Blinds, Maps, and the like.
Year: 1894

page_text: Date of Application, 1st June, 1894
Complete Specification Left, 27th Feb., 1895-Accepted, 1st June, 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to Window Blinds, Maps, and
the like.
I, FREDERICK WILLIAM MAISHMAN, of 34, Augustus Street, Regent's
Park, N.W., in the County of Middlesex, Printer, do hereby declare the nature
of this invention to be as follows:-
The object of my invention is to improve the means for checking or arresting the
motion of window blinds, maps and similar articles where a cord-receiving wheel or
pulley is used at one end of the roller.
To effect this I make the roller-end for fixing to the opposite end of the roller in
the following manner :-
I make a disc with a round bole in the centre and a projection or socket on one
side to receive the end of the roller.
I then make a spindle or pivot with a round pin at one end to fit into the hole
in the disc, and a square piu at the other end to fit into a square hole in the
bracket.
The central part of the spindle has a flange at the end nearest the square pin to
keep the ratchet-wheel, hereinafter described, in position.
I make a wheel with a round hole large enough for the central part of the
spindle to pass into.
'
One side of the wheel is made with a radiated or fan ratchet or with the ratchet
in the centre and flutes or hollows near the outer edge.
This wheel is mounted upon the spindle against the flange with the ratchet side
facing the disc above mentioned, and allowed to run free.
A spring is fixed to the spindle so as to engage the central part of the ratchet-
wheel and allow it to revolve in one direction only.
Two or more springs are fixed to the disc to act against the outer radius of the
ratchet-wheel.
The round pin of the spindle is then passed through the hole in the disc and
secured in such a manner as to allow the disc to rotate freely without drawing off.
Thus, when the blind is drawn down the disc supporting the roller will revolve,
the ratchet-wheel being kept back by the spring on the spindle, which always
remains stationary.
And when the blind is raised the springs on the disc will force the ratchet-wheel
to turn in the same direction.
The weight of the blind is sustained by the springs on the disc pressing against
the ratchet-wheel.
Ordinary brackets may be used providing one has a square hole.
Dated this 1st day of June 1894.

page_text: Improvements in and relating to Window Blinds, Maps, and
the like.
FREDERICK WILLIAM MAISHMAN of 34 Augustus Street Regent's Park N.W.
in the County of Middlesex Printer 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:—
The object of my invention is to improve and at the same time provide an
effectual means for checking or arresting the motion of window blinds, maps, and
similar articles (either in the ascent or descent) where a cord receiving wheel or
pulley is used at one end of the roller.
In order to carry out my said invention I make a disc of convenient size with a
round hole in the centre & provided with a projection or projections or socket on
one side to receive the end of the roller & be attached thereto..
I make a spindle or pivot with a round pin at one end of a suitable diameter
corresponding to the size of hole in the aforesaid disc & provide a square pin upon
the opposite end to fit a square hole in one of the ordinary brackets usually used
for suspension. At the extremity of the squared portion of the spindle or pivot
nearest to the centre, a flange is provided of sufficient diameter in order to keep
the ratchet wheel (hereinafter described) in position.
I make a wheel with a round hole drilled therein large enough for the central
part of the spindle or pivot to pass into & provide on one side a radiation or fau
ratchet or with the ratchet surface in the centre & flutes, hollows or undulations
nearest the outer edge. This wheel is mounted & permitted to run free upon the
aforesaid spindle abutting against the beforementioned flange with its ratchet or
undulated side facing the disc previously described..
Mounted upon the aforesaid spindle next to the ratchet wheel & fixed there-upon
a square provided for its reception is a spring of particular construction provided
with fangs bent outwards to engage with the central part of the ratchet wheel
allowing it to revolve in one direction only.
Upon the back of the beforementioned disc near to the outer edge and upon
opposite sides or at intermediate distances are attached two or more springs bent
radially & in such manner as to engage with the outer radius of the aforesaid
ratchet wheel.
The round pin of the spindle is then passed through the hole in the disc &
secured in such manner by nut washer or other suitable means as to allow the
disc to revolve freely without drawing off; the whole of the blind retaining
device is secured to one end of the roller by means of the clip, socket or projection
(which forms part of the before mentioned disc either as a casting or stamping secured
together by any suitable metal stamping device) the opposite end being provided
with a cord receiving pulley for actuating the roller, each end being provided
respectively with a square hole bracket corresponding to the square pin on blind
retaining device & a round hole bracket corresponding to the pin on cord
receiving pulley for purpose of securing the entire arrangement to the window or
other desired place.
And in order that my said invention may be fully understood I will now proceed
more particularly to describe the same & for that purpose shall refer to the figures
on the annexed sheets of drawings the same letters of reference indicating corre-
sponding parts in all figures.
Fig. (1) is a perspective view of the blind roller with the complete apparatus
attached thereto but placed. in the reversed position to that occupied in actual use
& shewing the blind roller broken.

page_text: Fig. (2) is a front elevation of the complete apparatus with half the roller clip,
projections or socket & disc broken away to enable the location & application of
the before-mentioned springs to be ascertained.
Fig. (3) is a longitudinal elevation of the entire arrangement except bracket &
shewing blind roller broken.
Referring to Figs. 1-2 & 3. A is the blind roller attached to the complete
apparatus by means of the clips, projections or socket B. C is the aforesaid disc
forming part of the roller socket to the back of which are attached at opposite
sides or intermediate distances two or more springs D bent radially and in an
undulated manner to press against the teeth upon the ratchet wheel E for purpose
of producing sufficient tension upon the roller to retain the blind map or the like at
any required height.
Upon the spindle or pivot F is first mounted the ratchet wheel E being allowed
to revolve freely upon its axis & pressed up to the flange f & retained in that
position by the pressure of the fangs g (which are bent outwardly) of the spring G
which is provided with a square hole in its centre corresponding in size to the
squared portion h provided upon the spindle F for its reception which prevents it
from turning in either direction, permitting its outwardly bent fangs g to operate
as fixed pauls upon the inner radius of the ratchet wheel E to prevent it from
turning when the blind map or the like is drawn down & to insist upon its turning
when the blind, map or the like is drawn up. The said spring G being held in
position upon the beforementioned square by the outer ends of the squared portion
being chiselled or thrown up as burrs as shewn in Fig. 3 at i & i or a distance
piece is sometimes next mounted upon the spindle F consisting of a piece of brass
tube fitting loosely & of sufficient length to maintain a convenient distance as shewn
in Fig. 3 between the aforesaid ratchet wheel E & the disc C by forming a shoulder
for the back of the disc C & the centre portion of the spring G to abut against,
although this distance can be maintained by the pressure exerted by the springs D
& G against the ratchet wheel E & back of disc C without the aid of the aforesaid
distance piece.
After the disc C is mounted upon the spindle F a nut or washer H is placed
upon the protruding end within the clips projections or socket B of the disc C & is
either burred over or screwed up tight to a shoulder to hold the whole rigidly
together but at the same time permitting the necessary freedom of the parts
requiring to revolve.
Thus in operation when the blind, map or the like is drawn down the disc C
supporting the roller A by means of the socket B will revolve; the ratchet wheel E
being kept back by the action of the spring G on the spindle F which always
remains stationary.
And when the blind, map or the like is raised the springs D. on the back of the
dise C will force the ratchet wheel E to turn in the same direction.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
First. In apparatus or means for arresting the motion of window blinds, maps or
the like either in the ascent or descent. A clip or socket secured upon one end of
a roller, terminating in and forming part of a disc upon the back of which are
attached springs bent and arranged to operate upon the outer radius of, and a
spring provided with fangs to operate upon the inner radius of a fan ratchet wheel
or equivalent device; the said disc springs and ratchet wheel being mounted upon
a spindle provided with a squared più end for fitting into a square hole bracket and
actuated by a cord receiving pulley mounted upon the opposite end of the roller,
substantially as herein before described.
Second. In apparatus or means for arresting the motion of window blinds, maps
5 or the like either in the ascent or descent. A disc forming part of the before-
mentioned socket arrangement either as a casting or secured together by any suitable

page_text: metal stamping device provided with a round hole in its centre through which
passes the end of a spindle, its outer radius serving as an attachment for springs
for operating substantially in the manner herein before described.
Third. In apparatus or means for arresting the motion of window blinds, maps
or the like either in the ascent or descent. Two or more springs secured radially
upon the back at opposite sides or at intermediate, distances near to the outer
radius of a disc and bent in such manner that the undulated surfaces of the springs
pressing upon the face of a fan ratchet wheel or equivalent device near to its outer
radius for retaining the blind, map or the like at any required height substantially
as & for the purpose herein before described.
Fourth. In apparatus or means for arresting the motion of blinds maps or the
like either in the ascent or descent. A circular spring having fangs bent outwardly
for acting as pauls and operating upon the inner radius of a fan ratchet wheel or
equivalent device provided with a square hole in its centre for mounting upon a
corresponding square upon a spindle and operating substantially in the manner
hereinbefore described.
Fifth. In apparatus or means for arresting the motion of window blinds, maps or
the like either in the ascent or descent. A wheel provided on one side with a
radiated or fan ratchet or with ratchets in the centre & flutes, hollows or
undulations near the outer edge, mounted upon a spindle and abutting upon a
flange free to revolve upon its axis actuated by means of springs pressing upon and
operating against the ratchet teeth substantially as and for the purpose herein before
described.
Sixth. In apparatus or means for arresting the motion of window blinds maps or
the like either in the ascent or descent. A spindle having a square pin at one end,
flanged at the extremity of the square nearest to the centre, and a round pin at its
opposite end for passing through a disc & socket arrangement & receiving a washer
or screwed nut for being burred over or screwed up to a shoulder, its centre portion
being provided with squares & shoulders substantially as & for the purposes
herein before described.
Seventh. In apparatus or means for arresting the motion of window blinds maps
or the like either in the ascent or descent. The combination with the subject
matter of the last preceding claiming clause of a bracket or suspender having a
square hole therein suitable for the reception of a square pin substantially as and
for the purpose hereinbefore described.
Eighth. The general combination and arrangement of parts constituting
improvements in & relating to window blinds, maps or the like, substantially as
herein before described & illustrated respectively by Figs. 1 & 2 of the accom-
panying drawings.
Dated this 27th day of February 1895.
FREDERICK WILLIAM MAISHMAN.