IMPROVEMENTS IN THE CONSTRUCTION OF LEVER PUNCHING MACHINES
Year: 1864

page_text: LETTERS PATENT to John Cameron, of Hulme, City of Manchester,
County of Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN
THE CONSTRUCTION OF LEVER PUNCHING MACHINES."
Sealed the 4th November 1864, and dated the 7th May 1864.
PROVISIONAL SPECIFICATION left by the said John Cameron at the
Office of the Commissioners of Patents, with his Petition, on the
7th May 1864.
I, JOHN CAMERON, of Hulme, City of Manchester, County of Lancaster;
Engineer, do hereby declare the nature of the said Invention for "Im-
PROVEMENTS IN THE CONSTRUCTION OF LEVER PUNCHING MACHINES," to be. as
follows:
These improvements consist in applying a cam on the driving shaft of. lever.
punching machines for the purpose of giving a positive reciprocating motion
to the lever. In machines of the ordinary construction the lever is raised by
a cam, and its own weight is relied upon to bring it back, but this motion is
uncertain, as the lever occasionally sticks and has to be hammered or other-
wise forced back, whereas by the application of another cam on the driving.
shaft, which pressing against a metal strap fixed to the lever gives it the return..
motion, a positive reciprocating motion is obtained.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Cameron in the Great Seal Patent Office on the 7th
November 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
CAMERON, of Hulme, City of Manchester, County of Lancaster, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of May, in the year of our Lord
One thousand eight hundred and sixty-four, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Cameron, Her special licence that I, the said John Cameron, my
executors, administrators, and assigns, or such others as I, the said John
Cameron, 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
THE CONSTRUCTION OF LEVER PUNCHING MACHINES," upon the condition (amongst
others) that I, the said John Cameron, 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 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 John Cameron, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
These improvements consist in applying a camb on the driving shaft of lever
punching machines for the purpose of giving a positive reciprocating motion
to the lever. In the present machines the lever is raised by a camb, and its
own weight is relied upon to bring it back, but this motion is uncertain as the
punch occasionally sticks in the punched hole and arrests the motion of the
lever, and has to be hammered or otherwise forced back, whereas by the ap-
plication of another camb on the driving shaft to give the return motion a
positive reciprocating motion is obtained, and the machine can be constructed
so as to take up less space.
In order that the Invention may be fully understood, I will now describe

page_text: the Drawings hereunto annexed, and forming part of this Specification, in
which Fig. 1 represents a sectional elevation of part of a punching and shear-
ing machine constructed according to my said Invention.
Fig. 2 a sectional elevation of a punching machine constructed according to
my said Invention, and with the second or double camb just beginning its
operation.
In each of the above Figures, the same letters of reference indicate like
parts. The arrows indicate the direction of motion of the driving shaft. E
is the driving shaft upon which are fixed the ordinary camb B, and the second
or double camb A. C is a wrought-iron strap, fixed to the punching lever D,.
as the shaft E rotates the two cambs B & A, rotate with it, B giving the
downward or punching motion, and A the upward motion to withdraw the
punch from the hole. In Fig. 2 it will be seen that the second camb A is
just coming in contact with the wrought-iron strap C, and as the rotatory
motion of the shaft continues, the camb A presses against the strap C and
gives the return motion to the lever. A positive reciprocating motion is thus
obtained, and the lever may consequently be made shorter as the weight of the
lever is not trusted to withdraw the punch.
Having described the nature of the said Invention, and the manner of carry-
ing the same into practical effect, what I claim is, the application of a second
camb or other suitable and similar apparatus to lever punching machines, in
which the punching motion is produced by a camb to obtain a positive recipro-
cating motion of the punching lever.
In witness whereof, I, the said John Cameron, have hereunto set my
hand and seal, this Third day of November, in the year of Our Lord
One thousand eight hundred and sixty-four.
Witness,
JOSEPH WILLCOX,
London & Manchester,
Patent Agent & Engineer.
(L.S.) JOHN CAMERON.