IMPROVEMENTS IN OR APPLICABLE TO CORRUGATED METAL REVOLVING Shutters AND THE GROOVES IN WHICH THEY WORK
Year: 1873

page_text: LETTERS PATENT to Alexander Clark, of Rathbone Place, in tho
County of Middlesex, Engineer and Revolving Shutter Manu-
facturer, for the Invention of "IMPROVEMENTS IN OR APPLICABLE TO
CORRUGATED METAL REVOLVING Shutters AND THE GROOVES IN WHICH THEY
WORK."
Sealed the 4th July 1873, and dated the 23rd January 1873.
PROVISIONAL SPECIFICATION left by the said Alexander Clark at the
Office of the Commissioners of Patents, with his Petition, on the
23rd January 1873.
I, ALEXANDER CLARK, of Rathbone Place, in the County of Middle-
sex, Engineer and Revolving Shutter Manufacturer, do hereby declaro
the nature of the said Invention for "IMPROVEMENTS IN OR APPLICABLE TO
CORRUGATED METAL REVOLVING SHUTTERS AND THE GROOVES IN WHICH THEY
WORK," to be as follows:-
My Invention relates to corrugated sheet metal revolving shutters,
and has for its object to more effectually deaden or prevent the noise
produced in raising or lowering the same. It consists in binding the

page_text: edges of the shutter with leather, cloth, webbing, india-rubber, or any
other suitable substance, whereby the resonance of the shutter is
deadened, and the shutter is prevented from rattling in the grooves in
which it works.
The leather or other material used is lapped round the edges of the
shutter so as to form a sort of binding, and it may be secured by lacing
through perforations made in the shutter, by boing glued thereto, by
rivets or cyclets, or in other suitable manner; or the strip of leatlier
may be threaded through holes near the edge of the shutter.
With the same object also I line the bottom as well as the sides of the
grooves in which the shutter works with leather or other suitable soft
material, which is glued or otherwise fastened therein, and the edges of
the leather may be left free and so disposed as to press against the
shutter. This part of my Invention is chiefly designed to be used in
combination with corrugated sheet metal shutters, made according to the 1
Invention for which I obtained Letters Patent, dated May 2nd 1872,
which consists in graduating the size of the corrugations so that when
the shutter is coiled up the corrugations will fit on one another, as
described in the Specification filed in pursuance of the conditions of the
grant. In the said Specification I described a method of lining the a
grooves with strips of wood or leather as a filling, but that abovo
described is preferable. In this case leather applied to the edges of the
shutter would interfere with its compactnoss when coiled up, and
therefore I apply the leather or other material in the grooves in such
manner as to completely isolate the shutter from the metallic or other a
grooves, and form a soft lining for the shutter to work against. Tho
grooves of other corrugated revolving shutters may however also be
similarly lined with the same object.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
CLARK, of Rathbone Place, in the County of Middlesex, Engineer and
Revolving Shutter Manufacturer, send greeting.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of January, in the
year of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Hor reign, did, for Herself, Hor heirs and successors,
give and grant unto me, the said Alexander Clark, Her special licence
that I, the said Alexander Clark, my executors, administrators, and
assigns, or such others as I, the said Alexander Clark, my executors,
administrators, and assigns, should at any timo agrco with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
OR APPLICABLE TO CORRUGATED METAL REVOLVING SHUTTERS AND THE GROOVES IN
WHICH THEY WORK," upon the condition (amongst others) that I, the said
Alexander Clark, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and scals, should par-
ticularly describo and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Alexander Clark, do hereby declare
the nature of my said Invention, and in what manner the same is to
bo performed, to be particularly described and ascertained in and by
the following statement, reference being had to the Sheet of Drawings
hereunto annexed, and to the letters and figures marked thereon, (that is
to say) :—
My Invention relates to corrugated metal revolving shutters, and has
for its object to more effectually deaden or prevent the noise made when
raising or lowering the same. It consists in binding the edges of the
shutter with a pliable material or fabric, such as leather, cloth, felt,
webbing, or india-rubber, but preferably leather, whereby the resonance
of the shutter is deadened, and the shutter is prevented from rattling
in the grooves in which it works.
The leather or other material used is lapped round the edge of the
shutter so as to form a sort of binding, and it may be secured by lacing
through perforations made in the shutter, by being glued thereto, by
rivets or eyelets, or in other suitable manner; or the strip of leather may
be threaded through holes near the edge of the shutter.

page_text: With the same object also I line the bottom as well as the sides of the
grooves in which the shutter works with a similar material. This part
of my Invention is chiefly designed to be used in combination with cor-
rugated sheet metal shutters, made according to the Invention for which
I obtained Letters Patent, dated May 2nd 1872, which consists in
graduating the size of the corrugations so that when the shutter is coiled
up the corrugations will fit one on the other, in which case leather
applied to the edges of the shutter would interfere with its compactness
when coiled up. I therefore apply the leather or other material in the
grooves in such manner as to completely isolate the shutter therefrom
and form a soft lining for it to work against. In the Specification of
the said Letters Patent I described a method of lining the grooves with
strips of wood or leather as a filling, but the method above described is
preferable, and the grooves of other corrugated revolving shutters may
also be similarly lined with the same object.
My Invention is illustrated in the accompanying Drawings, Figure 1
of which shows a front perspective view, and Figure 2 a cross section on
line 1, 1, Figure 1, of the shutter with the material applied as a binding.
a is the leather lapped round the edges of the shutter b so as form a sort
of binding, and secured by glueing or by rivets or cyclets, care being
taken that the heads of the rivets or cyclets do not come in contact with
the metal groove, as in that case noise would be produced. In the
Drawing the leather is shown as being fastened by eyelets c in holes
punched in the metal and leather.
Figure 3 shows a vertical section of a shutter with the leather threaded
through holes made near the edge of the shutter, so that the leather
shall pass alternately on either side of the shutter, as shown, and be
interposed between the outside curve of cach corrugation and the groove.
The holes are punched after the shutter is corrugated.
Figures 4 and 5 show cross sections of the grooves in which the
shutter works. e is the leather or other soft material with which the
grooves are wholly lined, as in Figure 4, or partially, as in Figure 5,
the leather being fixed in the grooves by means of countersunk screws c³,
or by being glued thercon, or otherwisc.
Having described the nature of my Invention, and the manner in
which the same is to be performed, I declare that what I claim as my