Holes, Applicable in Part to other Machines.
Year: 1884

page_text: Holes, Applicable in Part to other Machines.
I HENRY JAMES HARRISON of Kirkby in the county of Lancaster, Banker do
hereby declare the nature of my said invention for "IMPROVEMENTS IN MACHINES
FOR PUNCHING OR COUNTERSINKING HOLES, APPLICABLE IN PART TO
MACHINES to be as follows:-
OTHER
In the plates bars angles or other forms of metal employed in the construction
of boilers ships, bridges, or other engineering structures it is often required to have
a series of holes punched or otherwise made at given regulated distances apart and
to produce such correctly requires considerable time and skill on the part of the
operator.
This invention is designed with the object of so adding to or improving machines
of known or existing type that they shall when set without any special care or
alteration continue to form the holes at the required distances the one from the
other.
In this class of work punching is the more general method of forming the holes
and the apparatus described will be that for use in punching plates.
In front of the punch and die is placed a travelling table upon which the plate
is placed. This travelling table is not intended to carry the die for receiving the
punch though it could do so if desired but it is preferable to have the die fixed
and solid as in existing machines. To this travelling table the plate is clamped
and it is caused to move a given and regulated distance at each stroke of the
machine so that at each successive stroke a hole will be punched in the plate
the whole when complete forming a line or series of holes equidistant from each
other.
Motion is conveyed to the travelling table by one or more-preferably two spur
wheels gearing into a rack or racks; where two are used it is desirable to key
them onto the driving shaft in such position that a line drawn across the centre of
the teeth of one pinion will correspond with a line drawn through the centre of
the hollow between the teeth in the other pinion. The shaft carrying these pinions
is actuated by means of ratchet wheels and pawls the latter receiving reciprocating
motion from an eccentric rod, the eccentric of which is placed on the main or
other revolving shaft of the machine There are preferably four pawls carried

page_text: by the lever working into the teeth on the ratchet wheels so that the slightest
movement of the lever may be felt thereon The eccentric rod is connected to the
lever carrying the pawls by means of a stud and bracket moving in a slot or slide.
The position of this bracket in the slide is controlled by a screw or other similar
device whereby it can be easily moved a given distance As the lever carrying the
pawls is pivoted at or near the axis of the ratchet wheels the throw of the pawls is
altered by any alteration in the travel of the lever and the travel of the lever is
lengthened or shortened as the sliding bracket is placed nearer to or further from
the centre on which it is pivoted. A graduated scale may be placed on the side of
the lever for the purpose of adjusting the travel of the lever and thereby the
throw of the pawls and ultimately the distance between the holes punched in the
plate.
Although this machine is here described for the purpose of punching plates it
will be understood that the invention is applicable to other machines for cutting
or drilling plates, nor is its application limited to the manipulating of plates as
metal or other material in other forms may be operated upon.
A
11
220
PLAT
1001
WP. THOMPSON & Co.,
Agents for the Applicant.
Improvements in Machines for Punching or Countersinking
Holes, Applicable in Part to other Machines.
I, HENRY JAMES HARRISON of Kirkby in the County of Lancaster Banker do
hereby declare the nature of my said invention for IMPROVEMENTS IN MACHINES
FOR PUNCHING OR COUNTERSINKING HOLES, APPLICABLE IN PART TO OTHER
MACHINES and in what manner the same is to be performed, to be parti-
cularly described and ascertained in and by the following statement :—
In the plates, bars, angles and other forms of metal employed in the construction
of boilers, ships, bridges and other engineering structures, it is often required to have
a series of holes punched or otherwise made at given regulated distances apart, and
to produce such correctly requires considerable time and skill on the part of the
operator.
This invention is designed with the object of so adding to or improving punching
machines of known or existing type that the machine shall when adjusted and
set in notion continue to form the holes at the required distances apart without
special care or attention.

page_text: Figure 1 18 a side elevation.
Figure 2 a front elevation.
Figure 3 enlarged side elevation of ratchet lever and
Figure 4 front elevation of same.
A is a shearing and punching machine of ordinary construction, the details of
which will not require specifying. B is a travelling table with slides b running in
V grooves c in the framing C. The framing C carrying the table B is fixed in
front of the punch a and die a', the table having a to and fro motion. It is not
intended that the table B should carry the die a¹ as it is preferable to have the die
fixed and solid as in existing machines with its upper surface level with the top
of the table. The plates D to be punched are placed upon and clamped to the
table B, which is caused to move a given and regulated distance at each stroke of
the machine, so that at each successive stroke a fresh surface is presented, a hole
punched in the plate, the whole when complete forming a line or series of holes
equidistant from each other.
Motion is conveyed to the travelling table B through the spur wheels E gearing
into the racks F, though two pinions and racks are shown in many cases one rack
and pinion will be found sufficient. The shaft G to which the pinions E are keyed
is actuated by means of ratchet wheels H and pawls I.
The ratchet wheels H are keyed to the shaft G and the pawls are carried by the
ratchet lever J. Four wheels and pawls are shown as such insure greater steadi-
ness in working, and less liability to slip, though two only will answer the purpose,
each set in opposite directions, one to propel the table in one direction and the
other in the opposite direction. The punching machine is driven in the usual
way, and the punch a is actuated by a crank on the shaft K. On the outer end of
this shaft is affixed an eccentric, crank or disc L which will impart a reciprocating
motion to a connecting rod M. A slotted disc is shown as that is preferred, as
the throw of the rod M can be easily regulated or altered by increasing or
decreasing the distance of the pin m from the centre of the disc-a graduated
scale may be placed on the side of the slot to indicate the distance of the travel of
the connecting rod and the pitch of the holes to be punched. Where a machine is
intended for use in punching holes always at the same distance apart, a simple
eccentric or crank may be used. Motion from the disc L is conveyed by the
connecting rod M to the pivoted lever N and by it to rod O which is connected to
the ratchet lever J carrying the pawls which actuate the wheels H keyed to the
shaft G. The rod O is connected to the ratchet lever J by means of a movable
stud j on which it is pivoted. Through an eye on one end of this stud passes the
screw P fitted with hand-wheel p, by the movement of which the position of
studj can be regulated.
The pitch of the holes to be punched can be accurately determined by the
position of the stud or pin m on the face of the disc L and the position of the
stud j in the ratchet lever J. The pin m is first set according to the markings on
the face of the disc L as the pitch of the holes may be required 1, 2, 4, 6 or any
intermediate number of inches, the screw P being used to adjust the throw of the
pawls more accurately than can be done on the disc. Either of these methods of
adjustment may be used without the other, but both are preferred in combination
as shown, as providing more accurate and expeditious means of adjustment. Tho
rod O may be divided and the two parts joined together by a right and left hand
nut by means of which the rod can be lengthened or shortened. This does not
affect the travel of the rod, nor the pitch of the holes, but regulates the position of
the plate so as to set it in exact position for punching the first hole of the series.
R is a tappet engaging with lugs i on the pawls I by means of which either one or
both may be lifted out of gear with the wheels H. It also prevents more than one

page_text: or one set of pawls being in gear with the ratchet wheels at the same time, and is
actuated by the handle or lever r keyed to the same spindle.
Although the machine herein described is for the purpose of punching plates it
will be understood that the invention is applicable to other machines for cutting or
drilling holes in plates, nor is its application limited to the manipulating of plates
as metal or other material in other forms may be operated upon.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I wish it to be
understood that I do not make any claim for the several parts of the apparatus
taken separately, as such are well known to engineers, nor do I claim broadly the
use of a travelling table for carrying plates to be punched or drilled, as I am aware
that such have already been tried with more or less success, but that what
I claim is
1. The manufacture and use of machines for punching holes in plates in which a
travelling table is moved forward a given distance at each successive stroke of the
machine, by means of an eccentric, or its mechanical equivalent connected by rods
or levers to a ratchet lever, the pawls of which act upon ratchet wheels to move
the table, substantially as described and shewn.
2. The combination or arrangement of apparatus for moving the table of a
punching or drilling machine a regulated distance at each stroke, and altering the
distance of travel to correspond with the pitch of the holes, consisting of a
revolving slotted disc, eccentric or crank, a series of connecting rods or levers
and a ratchet lever having a movable connecting stud raised and lowered by a
screw or its mechanical equivalent, substantially as described and shown.
1 this 27th dow of 700%