IMPROVE- MENTS IN SHEARS FOR CUTTING SHEET METAL AND OTHER MATERIALS
Year: 1860

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,.
in the City of London, Patent Agent, for the Invention of "IMPROVE-
MENTS IN SHEARS FOR CUTTING SHEET METAL AND OTHER MATERIALS."―A
cation from chrood hu Ioan Mamat of Danic
Sealed the 14th June 1861, and dated the 18th December 1860.
PROVISIONAL SPECIFICATION left by the said Richard Archibald Brooman
at the Office of the Commissioners of Patents, with his Petition, on
the 18th December, 1860.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention for.
"IMPROVEMENTS IN SHEARS FOR CUTTING SHEET METAL AND OTHER MATERIALS,"
(communicated to me from abroad by Jean Momet, of Paris), to be as
follows:-
My Invention consists in constructing shears for cutting sheet metal and
other materials in the following manner for the purpose of making such
machines cheaply, strongly, and, where necessary, portable.
The fixed portions of the shears consist primarily of two plates or other
pieces of metal bolted or screwed together laterally, and each fastened down
to a sole piece where the machine is to be portable, or to a bench or frame
where it is to be fixed. A branch from one of these pieces of metal rises up and
extends partly along the machine, carrying at its extremity the end of a hand
lever by which the machine is worked. Near to the same end of this hand
lever a short connecting rod is pinned, and the other end of this connecting
rod is attached to one end of a rising and falling frame which carries the
moveable blade of the shears firmly secured in it. The other end of this

page_text: blade frame is double or forked, and embraces the standard which supports
the end of the hand lever, being bolted to the said standard by a bolt or axis
about which it turns. The extremities of the forked frame are connected by a
bolt. The fixed cutting blade is fitted into a dovetailed recess in the first of
the fixed pieces or plates of the machine. The moveable blade is dovetailed
into the frame that carries it, and its position regulated by screws passing down
through the frame. The length of stroke of the blade is regulated by a screw
passed through a projection formed upon the connecting rod before described.
In some cases a guide is employed to regulate the position of the metal sheet or
other material which is being cut, such guide consisting of two rods attached to
the machine and connected by a band or bar of metal, against which the sheet
metal slides. The sheet metal is supported while being cut by the fixed
portions of the machine, which are shaped so as to form a platform to
receive it.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 18th June 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD.
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of December, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-fourth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Richard Archibald Brooman, Her special licence that I, the said
Richard Archibald Brooman, my executors, administrators, and assigns, or such
others as I, the said Richard Archibald Brooman, my executors, administrators,
and assigns, should at any time agree 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 SHEARS FOR CUTTING SHEET METAL AND OTHER
MATERIALS," a communication from abroad by Jean Momet, of Paris,
upon the condition (amongst others) that I, the said Richard Archibald
Brooman, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what manner

page_text: 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 Richard Archibald Brooman, do hereby,
declare the nature of the said Invention, and in what manner the same is to,
be performed, to be particularly described and ascertained in and by the.
following statement thereof, reference being had to the Drawings hereunto.
annexed, that is to say:-
This Invention consists in constructing shears for cutting sheet metal, and
other materials in the following manner for the purpose of making such
machines cheaply, strongly, and, where necessary, portable.
The fixed portions of the shears consist primarily of two plates or other pieces
of metal bolted or screwed together laterally, and each fastened down to a sole
piece where the machine is to be portable, or to a bench or frame where it is to
be fixed. A branch from one of these pieces of metal rises up and extends
partly along the machine carrying at its extremity the end of a hand lever by.
which the machine is worked. Near to the same end of this hand lever a short
connecting rod is pinned, and the other end of this connecting rod is attached
to one end of a rising and falling frame which carries the moveable blade of the
shears firmly secured in it. The other end of this blade frame is double or
forked and embraces the standard which supports the end of the hand lever,
being bolted to the said standard by a bolt or axis which it turns. The
extremities of the forked frame are connected by a bolt. The fixed cutting
blade is fitted into a dovetailed recess in the first of the fixed pieces or plates of
the machine. The movable blade is dovetailed into the frame that carries it, and
its position regulated by screws passing down through the frame. The length of
stroke of the blade is regulated by a screw passed through a projection formed
upon the connecting rod before described. In some cases a guide is employed
to regulate the position of the metal sheet or other material which is being
cut, such guide consisting of two rods attached to the machine and connected
by a band or bar of metal against which the sheet metal slides. The sheet
metal is supported while being cut by the fixed portions of the machine which
are shaped so as to form a platform to receive it.
Figure 1 of the accompanying Drawings is a side elevation, Figure 2 a
plan, and Figure 3 an end view of shears for cutting metal and other materials
constructed according to this Invention; Figure 4 is a transverse section of
the blade and blade carrier frame detached. b is a strong metal plate carrying
a lug c, through which a bolt d is passed for fixing the shears to a frame or
bed plate; the plate 6 is forked and embraces an arched branch e, -which is

page_text: held to the plate by bolts. The branch'e as shewn at Figure 3 is bent in
such manner as to form a platform f for the cut metal to slide on. The head
of this branch e carries at one end a hand lever h, connected to it by a socket i;
is the blade carrier; it is jointed at one end to the socket i by means of the
connecting rod j, and is free to move about the point m on the branch e at the
other end, where it is forked and embraces the head of the branch e as shown,
the forked ends being united by the bolt n outside the head. o is a projection
on the rod into which a screw p takes, which is intended to regulate the
stroke of the blade and that of the lever which abuts against it; the position
of the screw p is capable of being regulated to enable the shears to cut a thin
or thick piece of metal. s is the lower or fixed blade dovetailed into
the plate b. The upper or movable blade is adjusted in the following
manner: The blade carrier k, Figure 4, is provided with a dovetail to receive
the blade ; it has two or more holes bored vertically in it to receive the
threaded rods 7, the lower ends of which are in communication with the
opening for the blade q. The blade q has a mortice t formed at that part
coming in contact with the blade carrier to receive a stud u on the rod r;
thus, by screwing down the nuts v, the rods r and studs u cause the blade q to
fit accurately in the blade carrier. Stops on the upper parts of the rods r
indicate the position of the studs in the blade carrier. When the blade is
worn a metal wedge is placed between the blade and the blade carrier, and by
increasing the size of the wedge as the blade becomes worn the latter can be
used until nearly the whole of the blade is worn away. The guide which is
sometimes employed is formed of two metal rods B inserted in collars or
sockets, where they are held by pressure screws. The two rods are hollow,
and are united by a band of metal or other material, or a spring, against which
the sheet metal or other material rubs.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim the improvements
in shears for cutting sheet metal and other materials herein-before described
and illustrated in the accompanying Drawings.
In witness whereof, I, the said Richard Archibald Brooman, have
hereunto set my hand and seal, this Eighteenth day of June, One
thousand eight hundred and sixty-one.