IMPROVEMENTS IN AND CONNECTED WITH SHUTTERS
Year: 1877

page_text: LETTERS PATENT to Bristow Hunt, of Serle Street, Lincoln's Inn, in the
County of Middlesex, Gentleman, for the Invention of "IMPROVEMENTS IN
AND CONNECTED WITH SHUTTERS" A. cominunication from abroad by William
Menzies, Gentleman, and William Menzies, junior, Merchant, both of New
York City, in the United States of America
Sealed the 19th March 1878, and dated the 22nd December 1877.
COMPLETE SPECIFICATION filed by the said Bristow Hunt at the Office of
the Commissioners of Patents on the 22nd December 1877.
BRISTOW HUNT, of Sorle Street, Lincoln's Inn, in the County of Middlesex,
Gentleman. "IMPROVEMENTS IN AND CONNECTED WITH SHUTTERS." [A commu-
nication from abroad by William Menzies, Gentleman, and William Menzies, junior,
Merchant, both of New York City, in the United States of America.]
This Invention relates to improvements in and connected with shutters for use in
dwellings, shop or store fronts, warehouses, manufactories, carriages, cars, boats, and
other conveyances, or in other places, and is especially applicable to that class of
shutters which are wound upon and unwound from a roller
The object of the Invention is to construct shutters so that they may afford
protection against burglars and fire, and also to admit or exclude light and air, either
throughout the whole extent, or a part or parts of them, while the spaces or
windows to be protected are entirely or partially covered by them.
The Invention consists in means whereby the shutters may be drawn over the
whole or a portion of the spaces or windows to be covered, and a number of their slats
nay be made to open or close to any desired extent and to remain so opened or
closed, whether the shutter covers the entire space or window, or a portion thereof
only, or they may be stationary or moving, and which means provide against
possible derangement or difficulty from any attempt to roll up the shutter while the
slats are partially or entirely open, and cause the slats to automatically assume
the proper position before coming in contact with the roller upon which they are
wound
These means consist essentially of twisted blades (one of which is secured to

page_text: '
each slat) and guides and extension pieces, which operate in connection with the
twisted blades, the latter traversing a space or channel between them.
The guides
have a transverse and oblique movement, and by moving the guides and extension
pieces the slats through their twisted blades may be held closed together, without
any openings save the joints, where the slats lap upon each other, or they may be
opened to any desired angle.
One set of guides and extension pieces may be employed to operate all the slats
of the shutter, or if it is desired to operate a number of the slats in soctions, inde-
pendent of the other slats in sections, any number of sets of guides and extension
pieces may be used for this purpose; when thus raised the guides and extension
pieces are so constructed and operated that the twisted blades may pass from one set
of guides to the other without hindrance, and with a minimum of friction, and be
under complete control.
The Invention is illustrated on the accompanying Drawings, of which,---
Figure 1 represents the inner side of a shutter, a portion of the framework being
removed to show the operating and controlling details.
Figure 2 represents devices which aid in operating and controlling the movements
of the slats, and in the position shown, cause them to remain closed.
Figure 3 is a plan view of devices that aid in operating and controlling the move-
ments of the slats seen from the right-hand end of the latter
Figure 4 represents a set of devices, additional to those shewn in Figure 2, to aid
in operating and controlling the slats, which devices, when in the position shown,
cause the slats to remain in a closed position.
Figure 5 represents a section of the devices shown in Figures 1, 2, 3, and 4, taken
on line a, a, looking from beneath, the twisted blade of one slat being shown in
position to cause the slat to remain in a closed position.
Figure 6 represents guides and a portion of their operating devices in such a
position that some of the slats may remain open and some closed, while the shutter
is over the window or space to be protected.
Figure 7 represents a plan view of the companion guides to those shewn in
Figure 6, and a portion of their operating devices, in such a position that some of
the slats shall remain open and some of them closed while the shutter is over the
window or space to be protected.
Figure 8 is a view looking towards the ends of the slats, showing the twisted
blades of the slats, the companion guides, and the devices for causing them to work
in unison so that some of the slats shall remain open and some closed while the
shutter is over the space or window to be protected
Figure 9 is a side elevation of the twisted blade of one of the slats with its
journal and mode of attachment to the slat proper, and also an end elevation of the
said twisted blade.
Figure 10 represents a spiral, the effect of which is to automatically cause the
shutter to continue in the plane occupied by it while over the window or space to
be covered while being wound upon or unwound from its roller
And Figure 11 represents one of the plates which works the controlling and
operating devices of the slats.
The Drawings show a shutter divided into two sections of seven slats each, cach
section of which can be operated independently of the other, and two sets of guides
and extension pieces, and the devices for operating the same.
In these Drawings 1 are the slats, the ends of which are provided with journals 2
(see Figure 9) having collars 3 to retain them in position in their bearings. These
journals may be made in one piece with the ends of the slats, or separate there-
from and secured thereto in any suitable manner.
4 are twisted blades (similar in form to screw augers) the curvature and function
of which is described herein-after.
Each slat is provided with at least one of these twisted blades 4, shown in the
Drawings, as secured to one of the collars 3, and projecting beyond it and the end
of the slat, and the journal at its opposite end is provided with a groove 5, into

page_text: which projects a plate 6, the groove and plate operating to sustain the thrust of the
blades 4 through the slats 1 in the operation herein-after described.
7 are links formed from sections of pipe of the width of the journal forced over
the journals in a die to form a bearing for said journals, their ends being cut into
tongue and groove, the tongue of one being inserted into the groove of the other,
and connected thereto by a rivet passing through them, forming chains, which are
secured at one end to a roller 8. This roller is provided with projecting journals 9, which
are supported by and roll over a ledge of inetal or other suitable material 10, secured to
or forming part of the framework around the space or window to be covered. The
ends of the roller are provided with spirals 11 (see Figure 10) in which pins 12,
secured to the frame or ledge 10, project, causing the roller, as it is revolved, to move
towards or recede from the plane in which the shutter operates in covering the space
or window, so that the shutter, while it is being wound up and unwound, will
always move in the same plane.
13 is a weight attached to weighted links 14, forming a chain, which latter is
attached at one end to the roller 8, and is capable of being wound upon the same,
and of descending through a space provided in the framework before referred to,
the said weighted links and weight serving to counterbalance the weight of the
slats, their journals, the links 7, and blades 4, and thoir friction in moving.
15 is a ratchet bar secured to the framework, in which a spring pawl 16,
operated by a raising finger-piece 17, engages to hold the shutter in any position
desired.
The chain formed by the weighted links 7 is secured to the roller at one end, so
that as the shutter descends, and its tendency to unroll is increased, the said links
are wound upon the roller, and as they accumulate thereon increase the leverage and
consequent force of the weighted links not unwound, and the weight 13, so as to
counterbalance the shutter at any point in its descent or ascent
To prevent the contact of the slats (and the links in which they are journalled)
with each other, a piece of leather or similar material is secured at one end to the
roller 8 just beneath the links, and is provided with a weight sufficient to carry it
down, which, when the shutter is wound upon the roller, is interposed between the
several layers of links, and keeps them and the slats from contact.
49, 114, 18, 19, 58, 95 (see Figure 3), are guides, which in connection with the
extension pieces 20, 21, 55, 83, 84, 98, and the blades 4 serve in their various
positions to open or close the slats to any desired extent or to keep them opened or
closed
The guides 48, 19, 58, and the extension pieces 20, 21, 55, are on one side, and
the guides 114, 19, 95, and the extension pieces 83, 84, 98, on the other side of the
space or channel traversed by the twisted blades 4.
The guide 18 is provided with projections 22 fitting in and capable of sliding in
oblique slots 23 in a stationary plate 24, and which serve to keep the said guide in
parallelism with the edge of the plate 24, and to cause it to take an oblique direction
when moved transversely for a purpose herein-after described. The guide 18 is also
provided with extension pieces 20, 21, which are retained and work in recesses in said
guide and against the plate 24, and are held in parallelism with the face of the guide
by projections 25 fitting and working in slots 26 in the guide 18; the guide 18 is
further provided with a stud 27 which passes through and works in an oblique slot 28
parallel to the slots 23, and also passes through a slot 29 (of greater obliquity than the
slots 23 and 28) in a movable plate 30 capable of sliding upon the plate 24, but on the
side opposite to that over which the guide 18 works. The plate 30 is guided on one
side by a flange 32 on the plate 24, and on the other side by pins 33. The stud 27
then passes through an oblique slot 45 in a plate 31, this slot running in a direction
opposite to that of, the slots 23 and 29; a pin and washer 100 holding the guide 18
and its extension pieces 20, 21, against the stationary plate 24 on one side, and the
movable plate 31 against the flange 32, and the projection 35 on the other side of
the stationary plate 24.
The plate 31 is guided by the flange 32 and a groove in the projections 35 (see

page_text: Figure 5), and is moved by a bar 36 provided with a rack 37 (see Figure 1) into
which a spur pinion 38 gears, the shaft of which spur pinion projects through the
framework above referred to, and can be turned either by a key fitting over its
square end or by a knob or any other suitable device. The plate 31 is also provided
with a rack 39 on its under side (see Figure 11) in which gears a pinion 40, the
function of which is described herein-after.
The extension pieces 20, 21, have rounded ends 43, 118, and are provided with
studs 41, which project through slots 42, 44, in the plate 24. The slot 42 in the
plate 24 is of the shape shewn for the purpose of causing the end 43 of the upper
extension piece to move in an oblique direction. The slot 44 has the form shown on
its lower side, with which the upper side of a slot 47 in a movable plate 48, which
lies over the plate 30, operates to cause the rounded end 118 to follow the curve of
the twisted blade 4 as will be described.
49 is a movable guide held in parallelism with the face of the plate 24 by a projection
working in a slot 50, a sciew projecting through said slot attaching it to the
plate 30, so that the said guide may move with the said plate. The lower end of
this guide 49 is rounded at 51 in a manner similar to the rounded ends 43, 118, of
the extension pieces 20, 21, and its upper end extends to about a point on a level
with the centre of the roller 8.
58 is a guide provided with projections 52 fitting in and capable of sliding in
oblique slots 53 in the plate 24, and which serve similar purposes to the projections
22. The guide 58 is also provided with an extension piece 55, which is retained
and works in a recess in said guide and against the plate 24, and is held in parallelism
with the face of the guide by a projection 57 fitting and working in a slot 59 in the
guide 58. The guide 58 is further provided with a stud 60, which passes through
and works in an oblique slot 61 parallel to the slots 53, and also passes through a
slot 62 of greater obliquity than the slots 53, 61, in a movable plate 48, capable of
sliding partly upon the movable plate 30, and partly upon the stationary plate 24,
but upon the side opposite to that on which the guide 58 works. The plate 48 is
guided on one side by the flange 32, and on the other side by pins 33; the stud 60
then passes through an oblique slot 63 in a plate 64, the said slot running in a
direction opposite to that of the slots 53, 62, a pin and washer 100 holding the
guide 58 and its extension piece 55 against the plate 24 on one side, and the plate
68 against the flange 32 and projections 35 on the other side.
The plate 64 is guided by the flange 32 and a groove in the projection 35, and is
moved by a bar 68 provided with a rack 65, into which a spur pinion 66 gears, the
shaft of which pinion projects through the framework above referred to, and can be
turned either by a key fitting over its square end, or by a knob or any other
suitable device. The plate 64 is also provided with a rack 67 on its under side, in
which gears a pinion 69, the function of which will be described herein-after.
The extension piece 55 has a rounded end 70, and is provided with a pin 72, which
projects through a slot 71 in the plate 24 and a slot 73 in plate 30, the lower
side of the former and upper side of the latter forming an oblique guideway in
one position for said pin.
The guide 19 is provided with projections 56, fitting in and capable of sliding in
oblique slots 74 in a stationary plate 75, which serve to keep the said guides in
parallelism with the edge of the plate 75, and to cause it to take an oblique direc-
tion when moved transversely for a purpose herein-after described. The guide 19
is also provided with extension pieces 83, 84, which are retained and work in
recesses in said guide and against the plate 75, and are held in parallelism with the
face of the guide by projections 76, fitting and working in slots 77 in said guide 19.
The guide 19 is further provided with a stud 78, which passes through and works
in an oblique slot 54 parallel to the slots 74, and also passes through a slot 79 of
greater obliquity than the slots 74, 54, in a movable plate 80 capable of sliding
upon the plate 75, but on the side opposite to that on which the guide 19 works.
This plate is guided on one side by a flange 32 on the plate 75, and on the other
side by pins 33. The stud 78 thus passes through an oblique slot 81 in a plate 82,

page_text: said slot running in a direction opposite to that of the slots 74, 79, a pin and washer
100 holding the guide 19 and its extension pieces 83, 84, against the stationary
plate 75 on one side, and the plate 82 against the flange 32 and projection 35 on
the other side of the plate 75. The plate 82 is guided by the flange 32 and a groove
in the projection 35, and is provided with a ruck 85, into which the pinion 40
gears, this pinion being journalled upon a standard 86 connecting the plates 24
and 75.
The extension pieces 83, 84, have rounded ends 91, 92, and are provided with
studs 87, 88, which project through slots 89, 90, in the plate 75. The slot 89 in
this plate is of the shape shown, for the purpose of causing the rounded end 91 of
the extension piece 83 to move in a curve following the curve of the twisted blades 4.
The slot 90 has the form shown on its upper side, and with which the lower
side of a slot 93 in a movable plate 94, which lies over plate 80, operates to form a
guideway for the pin 88.
114 is a guide secured to the plate 75, and having rounded ends 115, 116.
95 is a guide provided with projections 96 fitting in and capable of sliding in
oblique slots 97 in the stationary plate 75, and which serve similar purposes to the
projections 56. The guide 95 is also provided with an extension piece 98, which is
retained and works in a recess in said guide and against the plate 75, and is held
in parallelism with the face of the guide by a projection 101, fitting and working
in a slot 102 in the guide 95. The guide 95 is further provided with a stud 103,
which passes through and works in an oblique slot 104, parallel to the slots 97, and
also passes through a slot 105 of greater obliquity than the slot 104 in a movable
plate 94, capable of sliding partly upon the. movable plate 80, and partly upon the
stationary plate 75, but on the side opposite to that on which the guide 95 works.
This plate 94 is guided on one side by the flange 32, and on the other side by pins
The stud 103 then passes through an oblique slot 107 in a plate 108, said slot
running in a direction opposite to that of the slots 104, 105, a pin and washer 100
holding the guide 95 and its extension piece 98 against the plate 75 on one side,
and the plate 108 against the flange 32 and projection 35 on the other side.
33
The plate 108 is guided by the flange 32 and a groove in the projection 35, and
is provided with a rack 109, into which the pinion 69 gears, this pinion being
journalled upon a standard 110, connecting the plates 24 and 75 together.
The extension piece 98 has a rounded end 99, and is provided with a pin 111,
which projects through a slot 112 in plate 75. The slot has the form shown on its
upper side to act with the lower side of a slot 113 in the plate 80, to cause the
rounded end 99 to follow the curve of the twisted blades 4, as herein-after
described.
IDED ANTON

page_text: plate 24, in which groove the pin 72 attached to the extension piece 55 may operate,
as will be explained. When the plate 20 is thus raised the guide 49 is raised with
it so as to allow a space for the twisted blades 4 of the slats 1 to turn in as they are
wound or unwound from the roller. The pin 41 of the extension piece 21, projecting
through the slot formed by the upper side of the slot 47 in the plate 48, and the
lower side of the slot 44 in plate 24, causes the extension pieces 21, as it moves in
a transverse oblique direction with the guide 18, to follow the curve of the twisted
blades 4, so that this extension piece 21 may always bear upon the twisted
blades 4.
As the plate 31 is drawn down its rack 39 engages with the pinion 40, and
turning the same, causes the plate 82 to rise through the engagement of the pinions
40 with its rack 85; as the plate 82 rises it causes the stud 78, through its slot 81,
to move obliquely, transversely, and upwardly in the slot 54, and with it the guide
19 held in parallelism with the face of the plate 75 by the projections 55 in the
slots 74. The pin 87 of the extension piece 83 traverses the slot 89 as the guide 19
moves in a transverse and oblique direction, and said extension piece 83 is thus
inade to follow the curve of the twisted blades 4, so that this extension piece 83
may always bear upon the said twisted blades. The plate 80, through the stud 78
working in its slot 79, is lowered, and with it the pin 111 and its extension piece 98
of guide 95, so as to allow a space for the twisted blades 4 of the slats 1 to turn in
as the slats are wound or unwound from the roller 8. The pin 88 of the extension
piece 84, projecting through the slot formed by the lower side of slot 93 in plate 94
and the upper side of slot 90 in plate 75, causes the extension piece 84 to move into
its recess in the guide 19, so as to allow a space for the twisted blades 4 of the slats
1 to turn in as the slats are wound or unwound from the roller 8.
The guide 18 moving downwardly in a transverse oblique direction, and the
guide 19 moving upwardly in a transverse oblique direction, cause the twisted
blades 4 to turn easily and with a minimum of friction, while the extension pieces
20, 21, 83, 84, 98, and the guide 49 assume the proper position to allow the twisted
blades 4 to cause them to turn and to maintain them in a turned position until just
before the slats reach the rollor 8. The curve of the twisted blades 4 is such that
when the guides 18, 19, have terminated their downward, upward, transverse, and
oblique movements the slats will be turned horizontally to admit air or light.
The position of the guides 18, 19, 49, and extension pieces 20, 21, 83, 84, 98, and
part of the devices that operate them when they have been moved to open the
seven upper slats is shown in Figures 1, 6, 7, and 8.
The shutter may be wound upon the roller without changing the position of theso
devices. As the shutter is wound up it is necessary that the slats should be turned
so as to lie flat upon the roller.
The twisted blades 4 leave the channel or space formed by the guides 18, 19, and
the extension pieces 20, 83, when one edge of that portion of the twisted blades
nearest the collars 3 of the journals of the slats comes in contact with the rounded
end 116 of the guide 114, and following said guide are turned, and with them their
slats into a flat position, which is maintained by the guide 49, the said twisted
blades leave as the slats are wound upon the roller in that position. As the twisted
blades 4 of the slats that were closed when the shutter was over the space or
window to be protected come in contact with the rounded end 118 of the extension
piece 21, they are turned, causing the slats to assume a horizontal position, in which
position they are held while the twisted blades 4 are between or passing between
the guides 18, 19, and their extension pieces 21, 84, 20, 83, when they are again
turned by the guides 114 and 49.
The guides and extension pieces can be moved into the position just described
when the shutter is wound up as well as when it is unwound.
When it is desired to use the same it is lowered and the twisted blades 4 coming
in contact with the rounded end 91 of the extension piece 83 are turned, and with
them the slats, the latter assuming a horizontal position, which is maintained as the
twisted blades pass between the guides 18, 19, and extension pieces 21, 84, until

page_text: that portion of them nearest the collars 3 of their journals comes in contact with
the rounded end 70 of the extension pieces 55 when they are turned and their slats
made to assume a closed position.
The guides 18, 19, and their extension pieces may be moved to the extent of their
transverse oblique movement to cause the slats to be opened to a horizontal position,
as described; or they may be moved to any position between their initial and
terminal transverse oblique movements, and thus enable the slats to be opened to
any desired angle, and to be wound up and unwound, so that they shall assumo
that angle when the shutter is over or partially over the space or window to be
covered.
The
To open the seven lower slats when the shutter is down, over the space or
window to be covered, and the devices just described occupy the positions shown in
Figure 1, 6, 7, and 8, the pinion 66 is turned, drawing down the plate 64 through
its bar 68; this movement causes the stud 60, through its slot 63, to move trans-
versely, obliquely, and downwardly in the slot 61, and with it the guide 58 held in
parallelism with the face of the plate 24 by the projections 52 in the slots 53
pin 72 of the extension piece 55 projecting through the slot formed by the upper
side of slot 71 in plate 24, and the lower side of slot 73 in plate 30 causing the
extension piece 55, as it moves in a transverse and oblique direction with the
guide 58, to follow the curve of the twisted blades 4, so that this extension piece 55
may always bear upon the twisted blades 4 and come in contact with the extension.
piece 21 to form a continuous guide The plate 48 through the stud 60 working in
the slot 62 is raised, bringing the lower side of slot 47, so as to form an oblique
groove with the upper side of slot 44, in which groove the pin 41 may operate
when the plate 31 is raised to cause the seven upper slats to be closed.
As the plate 64 is drawn down its 1ack 67 engages with the pinion 69, and
turning the same causes the plate 108 to rise through the engagement of the
pinion 69 with its rack 109. As the plate 108 rises it causes the stud 103, through
the slot 107, to move transversely, obliquely, and upwardly in the slot 104, and
with it the guide 95 held in parallelism with the face of plate 75 by the projections
96 in the slots 97..
The pin 111 of the extension piece 98 projecting through the slot formed by the
lower side of the slot 112 and the upper side of the slot 113 causes the extension
piece 98 to move in a transverse, oblique, upward direction with the guide 95 move
out of its recesss, so as to come in contact with the extension piece 84 of the
guido 19 to form a continuous guide.
The plate 94, through the stud 103 working in the slot 105, is drawn_down,
carrying with it the pin 88 attached to the extension piece 84, so as to form a
continuous guide with the extension piece 98, and also to be in a position to follow
the curve of the twisted blades 4 when its guide 19 is moved obliquely and trans-
versely from the position it now occupies.
The guide 58 moving downwardly in a transverse oblique direction and the
guide 95 moving upwardly in a transverse oblique direction cause the twisted
blades 4 to turn easily and with a minimum of friction, while the extension pieces
55, 98, 84, assume the proper positions to cause the twisted blades 4 to turn and
maintain them in a turned position.
These guides and extension pieces can be placed in the position just described
when the shutter is wound up as well as when it is unwound, and they may be
moved to the extent of their transveise oblique movements to cause the slats to be
opened to a horizontal position, as described, or they may be moved to any position
between their initial or terminal transverse oblique movements, and thus enable the
slats to be opened at any desired angle, and to be wound up and unwound, so that
the slats shall assume that angle when the shutter is over or partially over the space
or window to be covered
If it is desired to close the seven upper slats while the seven lower ones are open
and held open, as described, it is only necessary to raise the plate 31 through its
bar 36, rack 37, and pinion 38, when the reverse of the movements of the devices

page_text: for operating the guides 18, 19, herein-before described, takes place; the extension
piece 21 will move upwardly in a transverse oblique direction through its pin 41
projecting through the oblique slot formed by the lower side of slot 47 in plate 48,
and the upper side of slot 44 in plate 24, so as to allow the twisted blades 4 to
clear as they turn.
The
The guide 49 is drawn down in contact with the extension piece 20
extension piece 84 is caused to movo in a curve following that of the twisted
blades 4 through its pin 88 projecting through a slot formed by the upper side of
slot 93 in plate 94, and the lower side of slot 90 in plate 75, and the extension
piece 83 has a movement the reverse of that before described.
To close the seven lower slats after the upper seven have been closed, as just
described, it is only necessary to raise the plate 64 through its bar 68, rack 65, and
pinion 66, when the reverse movement of the devices for operating the guides 58, 95,
ĥherein-before described, takes place. The extension piece 21, whose pin 41 projecting
through slot 47 is drawn down, so as to come in contact with the extension piece 55
to form a continuous guido, and to be in position to follow the curve of the twisted
blades 4 when its guide 18 is moved obliquely and transversely from the position it
now occupies
The extension piece 55 through its pin 72 projecting through the
groove formed
by the lower side of slot 71 in plate 24, and upper side of slot 73 in plate 30, is
caused to come in contact with extension piece 21 to form a continuous guide.
The extension piece 98, through its-pin 111 projecting through the groove formed
by the lower side of slot 113 in the plate 80, the upper side of slot 112 in the
plate 75, is caused to move in a curve following that of the twisted blades 4 to
always bear upon them.
If it is desired to operate more than two sections of the shutter, one or both sets
of the devices described may be duplicated for this purpose.
Some of the details of construction may be varied or modified within wide
limits.
Antifriction wheels may be used on the various pins and studs described.
The twisted blades 4 may be placed in the middle or in any other part of the
slats desired, and their operating devices placed in corresponding and suitablo
positions
The links 7 may be made in a manner differing from that described, as they may
be constructed of several pieces of metal or otherwise to support the journal of
the slats.
Instead of the weight 13 and weighted links 14, a spring or springs may be used
'to act as counterbalances.
Although the shutter has been described as working vertically it is to be under-
stood that it may work with inclined or horizontal windows.
The slats may be journalled in a frame or sash capable of a sliding movement
instead of being wound upon a roller, as described.
The shutter may be made of any size desired. The slats may be made of metal,
wood, plain or colored glass, or other suitable material The shutters may be used
to cover any openings, either in buildings, vehicles, vessels, or elsewhere, as desired.
Having now described the nature and object of the said Invention, together
with the manner in which the same is to be or may be performed or carried into
practical effect, I would remark in conclusion that I claim as the Invention
communicated to me by the above-named William Menzies and William Menzies,
junior,―
First. A shutter composed of rolling slats that may be opened or closed to any
desired extent, and left so opened or closed whether the shutter be in motion or be
stationary, substantially as herein-before described.
Second. The slats 1 provided with twisted blades 4, for the purpose herein-before
*described.
Thind The combination of the slats provided with twisted blades 4, of devices for

page_text: operating in connection with said twisted blades, substantially as herein-before
described.
Fourth. The slats 1 turned by the guides having the transverse and oblique
movements described, the one upward and the other downward, thus reducing the
friction of the operating devices to a minimum, substantially as herein-before
described.
Fifth. The combination of the slats 1 provided with twisted blades 4, of
guides 114, 49, 18, 19, and extension pieces 83, 20, substantially as herein-before
described.
Sixth. The combination of the slats 1 provided with twisted blades 4, of
guides 95, 58, and extension pieces 98, 55, 84, 21, substantially as herein-before
described.
Seventh. The combination of the slats provided with twisted blades 4, guides 114,
49, 18, 19, extension pieces 83, 20, with the plate 31 provided with slot 45, plate 82
provided with slot $1, plate 30 provided with slot 20, plate 80 provided with
slot 79, plate 24 provided with slots 23, 28, 42, and plate 75 provided with slots 74,
89, 54, substantially as herein-before described.
Eighth. The combination of the slats 1 provided with twisted blades 4, guides 95,
5S, extension pieces 98, 55, 84, 21, plate 64 provided with slot 63, plate 108
provided with slot 107, plate 48 provided with slots 62, 47, plate 94 provided with
slots 105, 93, plate 80 provided with slot 113, plate 30 provided with slot 73,
plate 24 provided with slots 44, 53, 61, 71, and plate 75 provided with slots 90, 97,
substantially as herein-before described.
Ninth. The combination of the slats 1 provided with twisted blades 4, guides 114,
49, 18, 19, and extension pieces 83, 20, and guides 95, 58, and extension pieces 98,
55, 84, and 21, substantially as herein-before described
Tenth. The roller 8 provided with the spiral 11, for the purpose herein-before
described.
And, Eleventh. The roller 8 provided with the weighted links 14 and weight 13
to counterbalance the shutter in any position when over the window or space to be
covered, substantially as herein-before described
In witness whereof, I, the said Bristow Hunt, have hereunto set my hand
and seal, this Twenty-second day of December, in the year of our Lord
One thousand eight hundred and seventy-seven.
BRISTOW HUNT (L.S)