IMPROVEMENTS IN THE CONSTRUCTION OF APPARATUS " EMPLOYED IN PUNCHING HOLES IN BOILER AND OTHER METAL PLATES
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Joseph Mayoh and Charles Morton
Willson at the Office of the Commissioners of Patents on the 22nd September
1883.
JOSEPH MAYOH and CHARLES MORTON WILLSON both of Manchester in the
County of Lancaster. IMPROVEMENTS IN THE CONSTRUCTION OF APPARATUS
"
EMPLOYED IN PUNCHING HOLES IN BOILER AND OTHER METAL PLATES
"
Our invention relates to the construction of an automatic table and the
combination of the same with an ordinary punching machine for the purpose of
holding the plate to be punched and moving it a certain specified distance after
each action of the punch so as to punch the holes to any pitch desired.
The invention can be applied to the punching of holes in boiler plates, girder
plates or in other cases where it is desired to punch a certain number of holes
at a definite distance apart, and to be able to regulate such distance at pleasure.
The invention consists mainly of a long bed provided with V-shaped or other
slides upon which a table or carriage is capable of moving to-and fro; the said
table or carriage being actuated by means of a screw driven by gearing connected
with the principal spur wheel on the cam shaft of the punching machine.
The table is provided with screw cramps by which the plate to be punched is
fixed thereto and these cramps are so arranged that they can be swivelled round
in any direction or removed altogether if necessary.
The table is also provided with parallel guides or dogs actuated by screws and
gearing by means of which the position of the plate upon the table or carriage
may be altered and adjusted in a transverse direction.
The motion of the table or carriage after each action of the punch is effected as
follows:-
The principal spur wheel of the punching machine drives a similar wheel,
mounted upon a shaft on which is keyed an excentric. The rod of this excentric
is attached at its other end to a die or slide mounted in a slot in a lever which is
fixed to a rocking shaft.
On this rocking shaft is also fixed another lever carrying a dog working on the
teeth of a wheel placed loosely on the shaft and connected by spur and bevil
gearing with the screw which actuates the table or carriage as before mentioned.
[ Drive 011

page_text: The excentric is so placed on its shaft that at the time when the hole is being
punched, the dog is over-running the teeth of the wheel and the table remains
stationary and that the table or carriage is moved automatically the required
distance during the time that the punch is above the plate.
う
This action goes on until the row of equidistant holes has been punched from
one end of the plate to the other.
The plate is then adjusted in a transverse direction by means of the parallel
guides so as to bring another line or row under the action of the punch; the
position of the dog or ratchet on the loose wheel is reversed and the screw being
thus driven in the opposite direction a second row of holes will be punched till the
opposite end of the plate is reached, and so on alternately until the required
number of rows of holes has been punched.
By the use of our improved apparatus several plates can be made to be exact
counterparts of each other and when brought together the holes will coincide with
the exactness required for rivetting.
The die or slide in the slotted lever is fitted with a screw and hand wheel by
means of which its position in the slot can be brought nearer to or further from
the centre of the rocking shaft and thus the distance between each two holes can
be regulated.