IMPROVEMENTS IN PUNCHING MACHINES
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by the said Joseph Turner at the Office
of the Commissioners of Patents on the 23rd January 1880.
JOSEPH TURNER, of Canning Town, in the County of Essex, Engineer.
"IMPROVEMENTS IN PUNCHING MACHINES."
This Invention relates to improved machinery for punching gutter, T, L, and
other shaped bars or plates of iron or other metals, whereby the operation is effected
with great expedition and regularity of pitch, no marking or lining off of holes
being required.
Upon the bar or plate to be punched is fixed by set screws a rack bar furnished
with two rows of teeth, one row for the purpose of advancing the bar through the
required distance after each hole has been punched, the other for the purpose of
regulating the pitch of the holes. Into the former row of teeth gears a pinion
keyed on a spindle actuated by means of a hand wheel or its equivalent. The
driving spindle is mounted on suitable bearings on the bed of the machine, and
when caused to rotate the rack bar and with it the bar or plate to be punched is
caused to advance. On the end of the spindle rides loosely a pawle which drops
into the second row of teeth, which are made of a pitch to correspond with the
holes in the bar or plate to be punched.
The operation of this mechanism is as follows:-The rack being secured to the
bar or plate to be punched, by rotating the spindle, before mentioned, the bar or
plate is caused to advance through a certain distance determined by the pitch of
the teeth, into each of which the pawl drops in turn.
The dropping of the pawle indicates to the workman that the work has been
moved a distance corresponding to the pitch of the bolt holes desired to be punched.
He then stops the traverse of the work (supposing the feed to be effected by hand)
and the punch is then advanced to act upon the work.
It will be understood that to provide for punching holes of various pitches two
or more rows of notches or ratchet teeth might be provided on the rack bar for the
pawl to work over. These notches or ratchet teeth might be formed in a detachable
strip of metal and applied to the rack bar as required.
propose to rest the angle iron to be punched in grooves cut in rollers or wheels
which are adjustable in their bearings so as to regulate the height of the horizontal
angle iron and rack bar as it is travelled forward in front of the punch.
By employing several of these rack bars and clamp attachments a continuous
supply of angle iron to be punched may be effected.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Joseph Turner in the Great Seal Patent Office on the 23rd July
1880.
JOSEPH TURNER, of Canning Town, in the County of Essex, Engineer.
"IMPROVEMENTS IN PUNCHING MACHINES."
This Invention relates to improved machinery for punching gutter, T, L, and
other shaped bars or plates of iron or other metals, whereby the operation is effected
with great expedition and regularity of pitch, no marking or lining off of holes
being required.
In Sheet I of the accompanying Drawings Fig. 1 shews in plan view, Fig. 2
in longitudinal section, and Fig. 3 in end view so much of a punching machine, with
my improvements applied thereto, as will serve to explain the nature of my
Invention. In these Figures A is a bar of angle iron in which holes are required
to be punched. This bar rests upnn supporting grooved rollers B, B, which are
mounted loosely on vertically adjustable axles carried by slotted bearings affixed to
the frame C. This framing has fitted to it a bolster D, over the face of which the
bar to be punched passes and by which the bar is supported against the thrust of
the punch E. The bolster is formed with an opening which is in line with the
punch, and is intended to receive the metal which is forced out of the bar A by the
punch.
Upon the bar to be punched is fixed by set screws a rack bar F furnished with
two rows of teeth f, f', one row for the purpose of advancing the bar through the
required distance after each hole has been punched, the other for the purpose of
regulating the pitch of the holes to be punched. Into the rack teeth gears a
pinion G keyed on a horizontal spindle G¹ actuated by means of a hand wheel G³,
or its equivalent. This driving spindle G¹ is mounted in suitable bearings on the
framing of the machine, and when caused to rotate the rack bar and with it the bar
to be punched is caused to advance. On the end of the spindle rides loosely a
pawl H which drops into the second row of teeth or notches f¹, which are made of
a pitch to correspond with the holes intended to be punched in the bar or plate.
Fig. 4 shews in cross section on an enlarged scale a bar of angle iron intended to
be punched, with the rack bar attached thereto by means of screw clamps, and
illustrating one mode of varying the pitch of the work. By the side of the line of
teeth or notches f¹ an additional bar F1 is secured to the bar F by screw bolts
carrying teeth or notches of a different pitch f². When this second bar is used
the pawl H will be required to be shifted laterally on its spindle to bring it over
its line of notches f². These notches f¹, f, take somewhat the form of ratchet
teeth, and present an incline for the point of the pawl to travel up that it may rise
from the bottom of the notch to the top of the bar as the work is advanced after
the punching of a hole.
The operation of the machine is as follows:-The rack bar F being secured to the
bar to be punched, by rotating the spindle, before mentioned, the bar is caused to
advance through a certain distance determined by the pitch of the teeth or notches f¹,
into each of which the pawl drops in turn.
The dropping of the pawl indicates to the workman that the work has been
moved a distance corresponding to the pitch of the bolt holes desired to be punched.
He then stops the traverse of the work (supposing the feed to be effected by hand)
and the punch E is then advanced in the usual manner to act upon the work.
To provide for punching holes of various pitches the arrangement shewn at Fig. 4
is employed, but strips of wood or metal notched to correspond to the work in hand
may be affixed to the bar F in any convenient manner to receive the pawl and
arrest the attention of the attendant, as explained.
I have described the grooved rollers for supporting the work as adjustable
vertically in their bearings. This is for the purpose of regulating the height of the

page_text: work with respect to the level of the punch, or for admitting bars or plates of
various depths into the machine.
By employing several of these rack bars and clamp attachments a continuous
supply of angle iron to be punched may be effected.
In Sheet II. of the accompanying Drawings I have shewn the Invention as
applied to a punching machine in which the punch works vertically. Fig. 5 is a
Bide elevation of so much of the machine as will explain the application of my
Invention thereto and Fig. 6 is an end elevation of the same. In this instance the
work which is again represented as a bar of angle iron A has clamped to it a bar F
with a row of notches f¹, into which takes a sliding bolt H carried by the framing.
In this example the gearing for traversing the work is omitted and in lieu thereof
the work is pushed or drawn through the machine, the workman feeling, as before,
when the work has attained the position for the punching operation to commence
or be renewed. Figures 7 and 8 shew on an enlarged scale a modified arrange-
ment for clamping the notch bar F to the work, the clamp being applied to the
opposite extremities of the bar.
Having now set forth the nature of my Invention of "Improvements in
Punching Machines," and explained the manner of carrying the same into effect, I
wish it to be understood that under the above in part recited Letters Patent I
claim, the application to punching machines of the means above described for
controlling the traverse of the work through the machine, and thereby rendering
unnecessary the marking or lining off upon the work of the holes to be punched.
In witness whereof, I, the said Joseph Turner, have hereunto set my hand
and seal, the Twenty first day of July, in the year of our Lord One
thousand eight hundred and eighty.
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ATYAITA