Improvements in Raising and Supporting Venetian Blinds and other similarly Accumulating Weights.
Year: 1892

page_text: Date of Appl.cation, 29th July, 1892
Complete Specification Left, 29th Apr., 1893-Accepted, 1st July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Raising and Supporting Venetian Blinds and other
similarly Accumulating Weights.
I, JOSEPH SAMUEL ORTON of 38 Wheeler Street, Birmingham, in the County
of Warwick Mechanician, do hereby declare the nature of this invention to be as
follows:-
This invention relates in part to improvements applicable to, and for the
perfection of parts of an invention for "Improvements in Raising and Supporting
Venetian Blinds and other similarly Accumulating Weights" for which Letters
Patent, No. 10,177 for 1888 were granted-parts of which patented invention
together with the improvements to be hereinafter described constitute this invention
of a new combination of parts of mechanism, which is intended to work or be
worked more beneficially than the said prior invention.
The object of this invention is to produce a new combination of parts of
mechanism in a compact and useful inanner or form-which said combination shall
include means for preventing derangement or displacement of the cords employed
for the transmission of motion, means for the regulation of the degree of power or
resilient force exerted by the spring, employed for producing counteracting motion,
in proportion to the number of the revolutions made by its rotating end, and means
for facilitating the raising and lowering of certain kinds of such said blinds or
similarly accumulating weights.
In accordance with this invention-as in my former invention the variable
weight or strain on the lifting cords of a Venetian blind, or of any similarly
accumulating weight or strain, may be constantly sustained both in being raised
and lowered, and retained when at rest, in a state of equilibrium with another or a
counteracting power or force, as for instance, the resisting or resilient force of a
spring.
-
Que arrangement of this invention may be described as follows:-The lifting
cords of a Venetian blind, or of similarly accumulating weights, may be suspended
from a rotating drum or roller (which for convenience of description will be herein-
after referred to as the main roller) which, with other rotating parts in the same
axial line is supported on pivots in suitable bearings, which, with all other bearings
hereinafter mentioned, are securely fixed to or on a travelling board which has an
end or longitudinal movement imparted to it during the simultaneous rotation of
the main roller, by means suitable to cause the lifting cords to coil and to uncoil
thereon and therefrom. The said travelling board is supported by and upon
antifriction rollers or spheres, rolling between it and a stationary board, which
may support the tapes of the blind. Attached to the main roller, or forming part
of it-say at its right hand end-is a conical or conoidal part, or a part varying in
diameter between its extremes or ends-(hereinafter referred to as the first cone)-
and, preferably, with its smaller end next to, or against the bearing which supports
it in combination with contiguous parts of the main roller. In a second axial line
parallel to the axis of the main roller and first cone, a second cone, placed inversely
to the first, with respect to the diameters of its ends rotates on pivots securely fixed
in its ends, supported in suitable bearings, and, when the coiling portions of the
lifting cords have been entirely coiled upon the main roller the maximum length
intended, one end of another cord, the extremity of which is securely attached at
or to the base of the first cone, extends to the smaller end of the second cone, and,
with the parts as now presented, the remainder of it lies coiled within a spiral
groove in the surface of the latter cone, of sufficient length to take up a portion or
length of this cord, equal to the portion of it which is intended to coil and uncoil

page_text: upon or from the first cone, and which groove extends spirally from the smaller end
of the second cone and terminates at its base, where the other extremity of the said
cord is securely attached.
When a combination of parts in accordance with this invention is employed for
raising lowering and supporting a comparatively small and light Venetian blind
which may be conveniently raised and lowered by imparting motion directly by
hand to the bottom of the blind,—the pivot which is firmly fixed in the smaller end
of the second cone extends beyond its bearing and is centrally and securely fixed in
the end of a roller or bar of sufficient length to extend from end to end, through
and beyond the end of a suitable encircling spiral spring, and which said roller or
bar terminates by or with a pivot supported in a bearing. One end of the said
spring is secured to the travelling board, and when this spring has been suitably
charged" or wound up, its other end is securely attached to the roller or bar.
The blind may then be placed higher or lower by hand and will remain in any
position as placed. But when a combination of parts in accordance with this
invention is employed for raising lowering and supporting a comparatively large
and heavy Venetian blind where it would be inconvenient to raise and lower it
wholly in the manner last described for a small and light Venetian blind, and
where a greater degree of variation of transmitted power may be required instead
of employing the last named roller and spring in the position indicated, the pivot
fixed in the smaller end of the second cone is formed into a rod or spindle which
extends to a length somewhat greater than the length of the parallel portion of the
main roller. The extremity of this rod forms a pivot securely fixed in the smaller
end of a third cone, grooved similarly to the second cone, and this said pivot and
the pivot secured in the base of the same cone are supported by, and rotate in
suitable bearings.
Situated opposite to the third cone, at the left hand end of the main roller,
and rotating in the same axial line, is a fourth cone, provided with pivots securely
fixed in its ends, and supported by suitable bearings, and the first and second
cones being in the position-with respect to their rotation-as last described, a
cord of which one extremity is securely attached at and to that end of the spiral
groove, which is near the base of the third cone, extends to the nearer or smaller
end of the fourth cone, and a portion of it about equal in length to the length of
the spiral groove in the third cone having been properly coiled upon the fourth
conc, its remaining end is securely attached at and to the base of the latter. The
main roller is constructed hollow so that it may form a receptacle for certain parts,
to be next described herein, without being in contact with them. The pivot in the
smaller end of the fourth cone extends beyond its bearing through a corresponding
hole in the centre of a disc, which rotates upon the said pivot and constitutes one
end of the main roller, and the said pivot projects axially for a convenient distance
into the interior of the main roller, and rotates in a central hole in, while affording
support to, the end of a longitudinal stationary bar which extends from end to end,
through and beyond a suitable encircling spiral spring and terminates by having in
its end a securely fixed pin or rod, which, projecting axially through a suitably
corresponding hole through the centre of the first cone is supported by its bearing
and forms a stationary pin or pivot upon which the first cone rotates. The rotating
end of the spring is securely attached by suitable means to a convenient part of
the extended pivot of the fourth cone, and its other end may be similarly attached
to the stationary bar or pin:—by turning or rotating the latter in the proper
direction, and then securing it in position, the said spring may be properly
charged or wound up, and the blind supported in a state of equilibrium.
<5
To facilitate the raising and lowering of a Venetian blind supported as last
described, the proper ends of two pendent cords- -or two pendent portions of one
cord hanging in a loop-may be so secured or attached to any convenient part or
parts of the main roller-or any suitable part in the same axial line by which the
blind may be raised or lowered-that, while the upper portion of the one in
ascending is being coiled upon one part, the upper portion of the other in descending

page_text: is being uncoiled simultaneously, so that, while the proper cord is being drawn
down, the blind and the other cord ascend, and when the latter cord is drawn down
the blind also descends, while the former is ascending and being recoiled. Or, in
accordance with this invention, instead of applying these cords in the manner stated,
a roller or drum may be secured on and to the spindle which carries the second and
third cones, or, which is preferred, this roller may be placed so that an elongated
pivot secured in the base of the second cone may pass centrally and be secured in
one of its ends, while its other end is provided with a pivot with a suitable bearing.
Then the upper ends of these cords being suitably secured to and disposed upon
the said roller, while one of these cords uncoils therefrom the other coils thereon,
and so vice versa, and by drawing down the one cord or the other respectively
results are obtained similar to those just herein before described. In order to
prevent possible derangement or displacement of the cord which is attached to the
first and second cones and to maintain it in a state of tension proper to ensure its
coiling and uncoiling in and from the spiral groove in the second cone and in its
proper position on the first, independently of the tension produced by the weight of
the blind-
-a spring, or a weight as a power, may, in accordance with this invention,
be applied and employed to effect this purpose:-for instance the resilient force of
a spring may be employed for this purpose by attaching one end of it, directly or
indirectly, to one or the other of the said cones in such a manner as to tend to cause
the cord attached to it to coil thereon, and, the spring having the proper resisting
force imparted to it, its other end may be secured to any suitable part, whether
stationary or otherwise.
The degree of the resisting force of the spiral spring, first named herein, in
relation to or proportion with the number of revolutions necessary to impart that
degree of resilience, may be varied or regulated in accordance with this invention
by a cylindrical part which slides in-say in a stationary end-and in contact with
its surrounding coils of, the said spring. By the advancement of the said part
further within the said end of the spring, the resilient force of the latter, in
proportion to the number of revolutions necessary to be imparted to its other end
to produce that force, may be gradually increased.
The worm or screw by the rotation of which, in a stationary nut, the travelling
board is caused to move to and fro longitudinally may be secured to other rotating
parts either in the first or in the second axial line herein indicated or mentioned.
Dated this Twenty-eighth day of July 1892.
JOSEPH SAMUEL ORTON.
COMPLETE SPECIFICATION.
Improvements in Raising and Supporting Venetian Blinds and other
similarly Accumulating Weights.
I, JOSEPH SAMUEL ORTON of 38 Wheeler Street Birmingham in the County
of Warwick Mechanician 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 in part to improvements applicable to and for the perfection
of parts of an invention for "Improvements in Raising and Supporting Venetian
Blinds and other similarly Accumulating Weights' for which Letters Patent
No. 10,177 for the year 1888 were granted-parts of which patented invention
together with the improvements to be herein after described, constitute this inven-
tion of a new combination of parts of mechanism which is intended to work or to
be worked more beneficially than the said prior invention.
The object of this invention is to produce a new combination of parts of
mechanism in a compact and useful form or manner and to provide means for
facilitating the raising and lowering of such said blinds, and other similarly
accumulating weights.

page_text: In accordance with this invention-(as with my former invention), the variable
weight or strain on the lifting cords of a Venetian blind (or of any similarly
accumulating weight or strain) may be constantly sustained, both in being raised
and lowered and retained when at rest,-in a state of equilibrium with another or
a counteracting power or force ;-as, for instance, the resisting or resilient force of a
spring.
I will now proceed to describe with reference to the accompanying drawings
forming part of this Specification the mode or manner in which this invention is
to be, or may be, carried into practical effect.
In the accompanying drawings,
Figs. 1 and 2, (Sheet 1), in plan and in elevation respectively, represent an
arrangement or combination of parts of mechanism illustrative of one form of this
invention
In Sheet 1, a, a and a represent the slats, and b, band b the tapes of a Venetian
blind of the ordinary construction. c, cand e are the lifting cords by means of
which the slats of the blind are raised and lowered. The upper extremities of the
cords c, c and c are securely attached to the drum or roller dat suitable points, so
that by the rotation of d in the proper direction, and by the simultaneous
longitudinal or end way movement to be herein after described, the cords c, c and c
are caused to coil thereon or to uncoil therefrom. e is a conical or conoidal part
employed as a fusee, which may be formed hollow and securely fitted on, and
affixed to the end of the drum or roller d,-or otherwise so attached as to always
rotate simultaneously therewith, and which in this arrangement of this invention
is preferably formed with a spiral groove of a pitch so varied or graduated in
degree that the length of the groove in one half of the length of e may be equal
to the length of the groove in the other half of it. The roller d and part e
combined as described are supported by the pivots and g rotating respectively in
the part 1 of the bearing, and the part 3 of the bearing, which are both
supported by, and firmly secured upon and to the bars j and k, which latter are
supported by, or carried upon, the antifriction rollers indicated by each 4, which
roll in the recesses indicated by each m in the board n, from which depend or
hang the tapes of the blind in the ordinary manner as shown in Fig. 2.
The
pivot firmly fixed and secured in e, extends beyond the bearing, and is
constructed with a screw or thread indicated by o and inclined as shewn, and which
screw engages in the stationary nut p in the upper part of the standard q, properly
made fast to the board n. With one extremity securely attached at and to a part
at the base of e, and so as to coil within and to uncoil from the groove in the said
cone e, is the cord r, which passes in a right line to and from, and coils within and
uncoils from, the spiral groove of varied pitch,-similar to that in the cone e,-
formed in the surface of a second cone, conoid or fusee s, rotating in a second
axial line parallel to the axis of the first cone e, and disposed or placed inversely,
with respect to the diameters of its ends, to the said first cone, as illustrated in
Fig. 1. The other extremity of the cord is securely attached at and to a part
at the base of s as shewn. When the cord lies within and fills the groove in e,
the said cord passes in a right line from a point near the smaller end of e to a point
near the base of s, and when the same cord lies within and fills the groove in " the
said cord then passes in a right line from a point near the base of e to a point near
the smaller end of s. The cones is provided with a pivot t fixed in its base, and
rotating in a suitable hole in the part 2 of the bearing h, and with another pivot u,
firmly fixed and secured in its smaller end, rotating in a hole in the bearing,
which is firmly secured to k. The pivot u extends beyond the bearing &, and
rotates freely in a central hole in, and supports the near end of, the rod or bar w,
and the cylindrical part is carried upon and made firmly fast to u. At the other
end of the bar is a central rod or pin y rigidly fastened in w, and the bar wand
piny are held stationary, or prevented from rotating, by the flattening of the pin y
at the part where the said pin is dropped within and fits the suitable vertical slot
indicated by 4 in the bearing i, as shewn in Fig. 1. The spiral spring = surrounds,

page_text: and is supported by, the bar wc, one end of the said spring being firmly fastened to
the rotating part, and the other end made fast to the bar w, both at the points
indicated by the respective ends of the spring as shewn. By raising the pin y from
out of the slot at 4 in the bearing i, and rotating the parts we and y in the proper
direction, the spring may be charged or wound up to a proper degree, the
piny may then be dropped back into the said slot, and these stationary parts so
retained.
The pitch of the grooves in the cones e and s is varied as herein before described,
because, while the cone e, with other parts in combination, may rotate at a regular
or uniform rate of speed, the speed of rotation of the cone s varies in comparison
with that of the cone e in proportion to the difference between the diametrical
dimensions of the parts of the cones between which the cord may extend while
in motion.
A and B represent two portions of cord, the upper extremities of which are
fastened to the roller d, and which are each so disposed upon d, that while the
cord A, by the proper rotation of d, is caused to uncoil therefrom, the cord B
simultaneously coils thereon,-and, reversely, while the cord B is caused to uncoil
from off d, the cord A at the same time coils thereon.
"
こ
In Fig. 2 the blind is represented as being almost wholly raised to its extreme
height, and if the cord A be pulled down, or the bottom of the blind be drawn
down directly by hand, the cord A. and the cords c, cand e will uncoil from the
roller d, while the cord B simultaneously coils thereon, the rotating movement of
the screw o, engaging in the stationary nut p, will cause the roller d, cone e and
all the parts supported upon and by the bars j and k moving on the rollers / to
travel to the right as represented by the drawing, the cord will coil within the
while uncoiling from the groove in s, and the spring will be further
groove in
charged
or wound up, and so exert an increased degree of resilience or resisting
force, but as the portion of the cord -(passing in a right line from the groove in e
to the groove in s)--will extend from a smaller diameter of e to a larger diameter
of than at the commencement of the downward movement as indicated, the
leverage, or mechanical advantage, gained in favour of the decreased weight on
the cords c, c and c, will compensate for the increased resisting force of the spring .
In raising the blind by pulling down the cord B, or raising the bottom of the blind
directly by hand, the conditions will be reversed, and leverage will be gained in
favour of the decreased power of the spring which will compensate for the
increased weight on the cords c, c and c.
Thus the blind may be raised or lowered, and will remain, in equilibrio at any
point that it may be desired that it shall rest.
Figs. 3 and 4 (Sheet 2) in plan and in elevation respectively, represent an
arrangement or combination of mechanism illustrative of another form of this
invention.
In Sheet 2, a', a' and a represent the slats, and b', ' and ', the tapes of a
Venetian blind suspended from the board n¹ in the usual manner.
The cords c', c¹
and care employed and operate in relation to the roller similarly to the
cords c, e and c in relation to the roller d herein before described in reference to,
and shewn in Figs. 1 and 2 (Sheet 1). e' is a cone or conoid employed as a fusee,
which may be formed hollow and securely attached to d, and is constructed with a
spiral groove of an even or uniform pitch.
The roller and cone e', combined as described and shewn, are supported by
the pivots and gl rotating respectively in the part 1 of the bearing and in the
part 3 of the bearing i, the said bearings being securely fastened upon and to the
travelling bars and ', and the said bars being supported upon the antifriction
rollers rolling in the recesses, indicated by each m', in the board n'.
The pivot firmly fixed in et extends beyond the part 1 of the bearing ¹, and
is constructed with a screw or thread (indicated by o' and inclined as shown),
engaging in the stationary nut pin the standard properly fastened upon and to
the board n'. The employment and operation of these parts is similar to the

page_text: 2
employment and operation of similar parts described herein in reference to Figs. 1
and 2 (Sheet 1). With one extremity securely attached at and to a part at the
base of the cone e', and so as to coil within or to uncoil from the spiral groove in
the said cone, is a cord, which passes in a right line to and from, and coils within
and uncoils from, the spiral groove of even or uniform pitch formed in the surface
of the second cone or fusce s¹ rotating in a second axial line parallel to the axis of
the first cone e', and disposed or placed inversely, with respect to the difference of
the diameters of its ends, to the said first cone, as shewn in Fig. 3. The other
extremity of the cord is securely attached to a part at the termination of the
groove at the base of s¹. When the cord lies within and fills the groove in e' the
said cord passes in a right line from a point near the smaller end of e' to a point
near the base of s¹, and when the same cord lies within and fills the groove in s
the said cord passes in a right line from a point near the base of e¹ to a point near
the smaller end of s¹. The cone sis provided with a pivot t¹ firmly fixed in its
base, rotating in a suitable hole in the part 2 of the bearing, and with another
pivot u fixed in its smaller end, and rotating in the bearing firmly fastened to .
In this arrangement the pivot t' extends beyond the part 2 of the bearing and is
constructed with a screw or thread-(indicated by D, and inclined as shewn),-and
which engages in the stationary nut p p in the standard y'. The pivot u extends
beyond the bearing ', and rotates freely and slides within a central hole in, and
supports the near end of, the rod or bar w', and the cylindrical part al is carried by,
and firmly secured to ul. The pin and spring are employed and operate
similarly to the pin y and spring described herein in reference to Fig. 1
(Sheet 1). Sufficient space is provided between the part 2 of the bearing hand
the bearings between the cone s' and the part a¹‚—and between the part and
the near end of the bar w, to permit of an end or longitudinal movement of the
screw D, pivot t', cone s', pivot i sliding in w', and the part a', which movement is
imparted to these said parts when rotating in either direction by the movement of
the screw D within the stationary nut p p --such said end movement being inde-
pendent of the longitudinal or end movement which is imparted to the bars and k
carrying the other parts of the mechanism, by the rotation of the screw o¹ in the
stationary nut p'. The pitch and spiral direction of the screws o' and D corresponds
with the spiral direction and pitch of the cones or fusees el and s', and while the
cone e (with other parts) may rotate and move in the direction of its axis at a
certain regular rate of speed, the similar axial movement of the cone s¹,-controlled
by the screw D and nut p p-is advanced or retarded in comparison with the axial
movement of e' in proportion to the difference of its speed of rotation. By this
arrangement of cones (or fusees) and screws, the cord always extends or stretches
in a right line from one cone to the other and is kept within the grooves; and if
the said cord should stretch or elongate somewhat the conditions remain the
same hence the particular advantage of this arrangement of this invention.
A and B represent two portions of cord employed, attached, and operated in the
same manner as herein before described in reference to the cords A and B,-Figs. 1
and 2 (Sheet 1), and as there stated so by this second arrangement of this
invention the blind may be raised and lowered, and will remain, in equilibrio at any
point that it may be desired that it shall rest.
Figs. 5 and 6 (Sheet 3) in plan and in clevation respectively represent an
arrangement or combination of parts of mechanism illustrative of another form of
this invention.
In Sheet 3, a², a² and a represent the slats, and 2, 12 and 2 the tapes of a
Venetian blind suspended from the board inithe ordinary manner. The cords e³, c²
and in this arrangement are also employed and operate in relation with the drum
or hollow roller d similarly to the cords c, c and c in relation to the roller d
(Figs. 1 and 2).
e is either a conical part (as shewn) or a conoidal or a cylindrical part rotating
with, attached to, or forming a part of, the hollow roller d. The roller and the
part 2 combined as described are supported by and rotate upon parts of the rod f²

page_text: and of the rod y' supported respectively by the bearings and h² securely fastened
upon and to the travelling bars and the latter forming a carriage supported
upon the antifriction rollers indicated by rolling in the recesses m² in the
board n².
The rod is held stationary or prevented from rotating by being flattened at
the part where it drops within and fits a suitable vertical slot in the standard q
firmly fastened to the board n². A suitable portion of the rod slides in a corre-
sponding hole in the bearing and also in the central hole in the end d³ of the
roller, and extending further centrally within the roller d² is constructed with a
screw or thread indicated by o' and inclined as shewn, which screw engages with
the rotating nut p² securely attached to the roller d. Beyond the screw of the rod ƒ³
enters and slides in a central hole in the near end of the rod or bar .
Upon and firmly secured to it is also carried the cylindrical part a². At the
other end of the bar w' is a central rod y rigidly fastened in w².
The rod y rotates centrally in, and supports the rotating part which, as shewn,
forms one end of d2 and is supported by the bearing 2, through which it extends
to, rotates in, and is supported by, the part 1 of the bearing . Firmly secured
upon the rod y, between the bearings and h³, is a part which may be conical
(as shewn), conoidal or cylindrical, but when conical or conoidal its smaller end is
preferably towards the smaller end of e as shewn, In a second axial line parallel
to the axis of the part e and of the part is a pair of cones or fusees in com-
bination, indicated by s² and s, which may be suitably varied in figure to produce
the required effect, in accordance with the figure given to the parts & and st.
For convenience the parts s² and s³ are united and placed base to base, so that
the base of may be opposite to the smaller end of e, and the base of 3 opposite
the smaller end of s. In this arrangement of this invention the parts s² and sare
shewn in Fig. 5 as being formed with spiral grooves of even or uniform pitch, and
the parts and as having plain surfaces, but it is also in accordance with this
invention to employ grooves in all parts used as equivalents to e, s2, 3 and 8* to
retain their cords in position, and in such case the said grooves will be similar in
character, as to the variation of pitch, to the grooves in eands (Fig. 1). The
united parts 2 and 3 rotate on pivots in their smaller ends, the one pivot t in the
part 2 of the bearing ³, and the other in the bearing 2 properly secured to k².
With one extremity securely attached at and to a suitable part at the base of e²,
and so as to coil thereon, and uncoil therefrom, is a cord 2 which passes to and
from, and coils within and uncoils from the spiral groove of even or uniform pitch
in the cone or fusce s2, and the other extremity of this cord is securely attached at
and to a part at the termination of the groove at the base of 2. Also, with one
extremity securely attached at and to a part at the commencement of the groove
at base of s is a cord ³ which passes to and from the said groove and coils upon
and uncoils from the parts, and the other extremity of the cord is securely
fastened at and to a suitable part at or near the base of s. The cords 2 and 3
have the same relation to the parts 2 and 2 and to the parts and respectively
as the cord (Fig. 1) with respect to the parts e and s.
2"
The spiral spring
surrounds and is supported by the bar --one end of the said spring being firmly
fastened to the stationary part 2, and the other end securely attached to the
rotating bar w. By releasing the end of the cord from the part stand by suitably
rotating the latter, the spring may be properly "charged or wound up, which
being effected, the said end of is re-secured to the proper part of st.
"
The cords A2 and 132 are employed and operate similarly to the cords A. and B
(Figs. 1 and 2), and when the blind (Fig. 6) is caused to descend, the cord A2 and
the cords, and will uncoil from the drum d while the cord B coils thereon,
the rotary movement of d² and nut p² engaging with the stationary screw o² will
cause the drum d², part e² and all the other parts supported upon the bars and k²
supported on the rollers to travel to the right, the cord will coil upon while
uncoiling from the groove in s², the cord will coil within the groove in 3 while
uncoiling from, and the spring will be further "charged " or wound up, and so

page_text: exert a greater degree of resilience or resisting power,-but, as the portion of cord
passing from 2 to the groove in 2 will extend from a smaller diameter of e² to a
larger diameter of sand, again, as the portion of cord passing from the groove
in to will extend from a smaller diameter of 83 to a larger diameter of s³ than
at the commencement of the downward movement as indicated, the leverage or
mechanical advantage gained in favour of the decreased weight on the cords ², c²
and will compensate for the increased resisting force of the spring 2. In raising
the blind the conditions will be reversed and leverage will be gained in favour of
the decreased power of the spring 2 which will compensate for the increased weight
on the cords cc and c. Thus the blind may be raised or lowered, and will remain,
in equilibrio at any point that it may be desired that it shall rest.
The chief features of novelty constituting this invention consist, firstly, in the
employment and application of a compensating conc or fusee on or in the same
axial line with any rotating parts to which lifting cords are or may be attached ;-
secondly, in the employment and application of a compensating cone or fusee on
or in the same line axially with a spring which communicates motion thereto;-
thirdly, in the employment and application of a spring rotating in the same axial
line with or as a hollow roller or parts to which lifting cords are or may be
attached; and fourthly in the employment and application of raising and lowering
cords to any suitable rotating part of the mechanism.
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:
Firstly In mechanism for raising and supporting Venetian blinds and other
similarly accumulating weight, a roller, drum or other rotating part to which lifting
cords are attached, combined with, or united to, a cone or fusce in the same axial
line, in combination with suitable bearings or parts forming a carriage supported
on antifriction rollers,-substantially as described herein, and illustrated in the
accompanying drawings.
Secondly-In mechanism for raising any accumulating weight, a roller, drum
or other rotating part to which lifting cords are attached and which is combined
with or united to a cone or fusee in the same axial line, both supported by bearings
on a carriage supported upon antifriction rollers, in combination with a screw and
nut, one of which latter is held stationary while the other imparts end motion or
movement to the said carriage,-substantially as described, and shewn in the
accompanying drawings.
:
Thirdly In mechanism for raising any accumulating weight, a cone or fusee
in the same axial line with other rotating parts to which lifting cords are attached,
in combination with another opposite cone or fusee in another axial line parallel to
the former, each of the said cones or fusees having one extremity of the same cord
attached at or to a part at or near its base, the available intermediate portion
of the said cord, between its extremities, being coiled wholly upon the one or the
other, or partly upon one and the remainder upon the other, substantially as
described, and illustrated in the accompanying drawings.
Fourthly-In mechanism for raising any accumulating weight, a cone or fusee
on a second axial line parallel to the axial line of the parts to which the aforesaid
lifting cords are attached, in combination with a spring operating in the same
axial line, one end of which being held stationary, the other is so attached to a
suitable part as to impart rotary motion, by its resilient force, to the said conc or
fusee, substantially as described, and shewn in the accompanying drawings.
Fifthly The arrangement combination and application of the several parts of
the mechanism, substantially as described, and illustrated in Figures 1 and 2 of the
accompanying drawings.
Sixthly In mechanism for raising any accumulating weight, a cone or fusee s¹
on a second axial line parallel to the axial line of the parts to which the aforesaid
lifting cords are attached, in combination axially with a screw and nut-one of which

page_text: is held stationary while by the rotation of the other, an end movement along the
line of its axis is imparted to the said cone or fusee, substantially as described,
and shewn in the accompanying drawings.
Seventhly; The arrangement, combination and application of the several parts
of the mechanism, substantially as described, and illustrated in Figures 3 and 4
of the accompanying drawings.
Eighthly In mechanism for raising any accumulating weight a cone or fusee s³
united to or combined with the cone or fusce on the same axis, in combination
with another cone or fusee s in the same axial line as the parts to which the lifting
cords are attached, each of the cones or fusees and shaving one extremity of
the cord attached to a part at or near its base,-substantially as described, and
illustrated in the accompanying drawings.
Ninthly In mechanism for raising any accumulating weight, a cone or fusee
in the same axial line as the parts to which lifting cords are attached, (but rotating
independently of these parts), in combination with a spring which communicates
motion thereto, all operating in the same axial line,-substantially as described,
and shewn in the accompanying drawings.
Tenthly; The arrangement, combination and application of the several parts
of the mechanism,-substantially as described, and illustrated in Figures 5 and 6
of the accompanying drawings.
Eleventhly The arrangement and application of the cords A and B in com-
bination with any suitable rotating part in mechanism wherein compensating cones
or fusces are employed,-substantially as described, and shewn in the accompanying
drawings.
Dated this Twenty-eighth day of April 1893.