AN IMPROVED CONSTRUCTION OF CUTTING MACHINE, APPLICABLE TO SHEARING, CUTTING, CHISELLING, SLOTTING, OR STIPPLING MACHINES, AND THE LIKE
Year: 1885

page_text: and the like.
I, HENRY HARINGTON LEIGH, of 22, Southampton Buildings, Chancery Lane,
in the County of Middlesex, Engineer & Patent Agent, do hereby declare the
nature of my invention for "AN IMPROVED CONSTRUCTION OF CUTTING MACHINE,
APPLICABLE TO SHEARING, CUTTING, CHISELLING, SLOTTING, OR STIPPLING MACHINES,
AND THE LIKE" a communication to me from abroad, by Jean Marie Mary, of
St. Denis, Department of the Seine, in the Republic of France, Tool manufacturer,
to be as follows:-
The object of my invention is the introduction of an improvement into the
construction of shearing or cutting machines for operating upon sheets of metal,
millboard, or the like.
In shearing machines where the two shears or blades are pivotted on a common
centre, it is impossible to bring the knife to bear upon any line within the edges of
the plate or sheet, without first making a cut from the edge of said sheet to the
point at which the desiderated operation is to be performed.
Now, according to my invention, instead of centreing the two shears at one point
common to both, the lower jaw is fixed at a convenient height, and the upper jaw
is fixed to a hand lever, or its equivalent, which may be furnished with a counter-
poise. The fulcrum of this lever lies in a cross bar carried by the frame of the
machine at a level above that of the machine-table in such wise that the upper jaw
will make a proper descent upon the sheet or other piece of work to be cut. The
table of the machine is cut away in front so as to afford free access to the workman
for moving the sheet or mass operated upon.
It is evident that the above system of construction is equally applicable to
slotting machines, to operating all kinds of chisels stippling and engraving tools
and the like.
I may make either the upper or lower jaws of my improved machine fixed, or
both movable, as may be desired.

page_text: An Improved Construction of Cutting Machine, Applicable to
Shearing, Cutting, Chiselling, Slotting, or Stippling Machines,
and the like.
I, HENRY HARINGTON LEIGH, of Nº 22, Southampton Buildings, Chancery Lane,
in the County of Middlesex, Engineer & Patent Agent, 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:-
My invention relates to an improved construction of machines used or capable of
being used for the purposes of cutting, chiselling, slotting, or stippling, for operating
upon sheets of metal, millboard, or the like materials; and is intended to replace the
well-known construction in which the two blades are pivotted, the one to the other
at one common point.
The draw back in the last mentioned construction has always been this. It has
been impossible to bring the cutters to bear upon a given line or point within the
area of the sheet to be operated upon, without, in the first place, cutting through
the sheet from the outer edge to the point at which it is desired that the blades
should be made to commence the cut, thereby forming a notch in which the
reciprocating blade or blades may work.
-
According to my invention, instead of centreing the two blades or shears at one
point common to both, I fix the lower blade or jaw at a convenient height, and
connect the upper one to a lever, having its fulcrum in an independent fixed point
furnished by a convenient part of the machine, at which point the blade is pivotted
so as to enable it to make a proper descent.
In the accompanying drawings which are to be taken as part of this specification
and read therewith, and in which like parts are marked with the same reference
·letter,
Fig. 1 is a side elevation of a machine constructed according to my invention,
Fig. 2 is a front elevation; and
Fig. 3 is a plan of the table hereafter described.
A is the frame, of any suitable material, the under part A' of which is of a
pyramidal form, carrying the tool-holder a to which the under blade b of the
cutting apparatus proper is fixed.
This blade is fixed, and projects above the centre of a table B cut away from the
front, as shewn in Fig. 3, so as to enable the workman to easily handle the sheet
being operated on. This table rests conveniently upon the pyramid A', and upon
brackets springing from the frame A.
C is a cross beam supported by the frame of the machine. It may be straight,
or bent, downwards as shewn. D is a downward extension thereof, and furnishes
the fulcrum upon which the bent lever E works. To this latter, and close to its
axis, a second blade e is fixed. This blade forms with the lower one b the two
cutters of the machine, the upper one being fixed so as to pass the lower one, as
may be required,

page_text: The projecting end of the lever terminates in a handle F, while the opposite end
carries a balance weight G.
It will be understood from the foregoing description, that in consequence of the
peculiar and characteristic construction of iny machine, the two blades (or one only
if so required) can be brought to operate upon a plate or other shaped object at any
given point, and that it is applicable to various kinds of machines for cutting,
slotting stippling and the like.
I do not confine myself to making the upper blade moveable, but may make
either the upper or the lower one, or both, capable of moving for the purposes of
my invention.
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:
A shearing, cutting, chiselling, slotting or stippling machine in which the two
cutters are not pivotted on one point common to both, but in which either the
upper or the lower blade may be actuated independently of the other, or both may
be movable, substantially as above described and illustrated in the accompanying
figures.
Dadhi 17th
1000
PHILLIPS & LEIGH,
Agents for the Applicant.