Improvements in Machinery as employed in Stamping or Raising of Metallic Articles.
Year: 1894

page_text: Date of Application, 16th June, 1894
Complete Specification Left, 20th July, 1894-Accepted, 25th Aug., 1894
PROVISIONAL SPECIFICATION.
Improvements in Machinery as employed in Stamping or Raising
of Metallic Articles.
I, LLEWLLEYN AUGUSTUS PARROCK, of 18 Presbury Road, Aston, Birmingham,
Mechanical Engineer, do hereby declare the nature of my said invention to be as
follows:-
:-
My invention has reference to that class of machine or "drop stamp," as
employed for stamping or raising metal articles, in which the power to lift the
stamp hammer is obtained from a revolving shaft overhead.
The usual and well known method is to provide a double shrouded pulley keyed
to the shaft securely and revolving with it. On this pulley lies a band of leather
or similar material, and when the workman pulls one end of this band the friction
on the pulley causes the stamp head to be lifted it being attached to the other end
of the band.
In my invention I make the double shrouded pulley loose on the shaft, and form
on it one half of a friction-coupling. The other half of this friction coupling
slides on a feather on the shaft and revolves with it. I provide two collars on the
shaft the one to retain the pulley in its place on the shaft and the other to limit
the motion of the sliding part of the coupling. Between the pulley and the sliding
part of the coupling I place a helical spring which tends to keep apart the two
parts of the friction clutch.
The sliding part of the coupling is brought into contact with the part of the
coupling on the pulley by means of a well known arrangement of a fork moved by
levers, these levers being actuated by a treadle under the control of the workman
The shaft overhead revolving all the time.
If the workman desires to lift the stamp head he presses his foot on the treadle,
the power thus exerted acts through the levers and pushes the sliding part of the
coupling against the corresponding part of the coupling on the pulley which it
causes to revolve, and by so doing lifts the stamp head, by the friction between the
pulley and the band to which the stamp head is secured.
When the stamp head is high enough the workman's foot is released from the
treadle, the spring on the shaft forces the sliding part of the coupling away from
the part on the pulley which ceases to revolve and the stamp head falls.
If the stamp head is raised too high (so that damage inay arise) it comes in
contact with the lever carrying the fork which throws the clutch out of gear
allowing the stamp head to fall.
Instead of a helical spring tending to keep the parts of the coupling apart 1 may
use a weight on one of the levers or other equivalent device.
Dated 16th June 1894.
THOS. KENdrick,
3, Cherry Street, Birmingham, Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery as employed in Stamping or Raising
of Metallic Articles.
I, LLEWLLEYN AUGUSTUS PARROCK, of 18 Presbury Road, Aston, Birmingham,
Mechanical Engineer, do hereby declare the nature of my said 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 has reference to that class of machine known as "drop stamp
employed in the stamping or raising of metal articles, the power to raise the stamp
hammer being obtained from a overhead revolving shaft.
By my invention I make the double shrouded pulley loose on the shaft and form
on it one half of a friction coupling the other half of this coupling slides on a
feather on the shaft and revolves with it, I provide two collars on the shaft the one
to retain the pulley in its place on the shaft and the other to limit the motion of
the sliding part of the coupling. Between the pulley and the sliding part of the
coupling I place a helical spring which tends to keep apart the two parts of the
friction clutch. The sliding part of the coupling is brought into contact with
the part of the coupling on the pulley by means of a fork moved by levers actuated
by a treadle or by hand of the workman.
The shaft overhead revolving all the time.
And in order that this my said invention may be more fully understood, I shall
now proceed more particularly to describe the same and for that purpose I shall
refer to the several figures on the sheet of drawings hereunto annexed the same
letters of reference indicating corresponding parts throughout all the figures.
1
Fig. 1 is a front view in elevation of my invention as "Improvements in
machinery as employed in stamping or raising of metallic articles."
Fig. 2 is a side view elevation of same.
Fig. 3 is a modification of one part detached.
a is the double shrouded pulley, loose upon the shaft b, c, on a, is one half of a
friction coupling, d is the other half of friction coupling which slides on 6, and
revolves with it, e is a collar on b, to retain a in its position, and f is a collar
to limit the sliding motion of the part coupling d, g is a helical spring the power of
which keeps c and d apart.
d is brought into contact with c, on a by the employment of the fork h, moved,
by the jointed levers, a' a³ upon the pins a' and is the treadle for actuating the
same which is carried by the support j and moves upon the pin k.
l
If the workman desires to lift the stamp head his foot is applied to the
treadle which in turn depresses a' and a¹ and the fork in the groove d
pushes the sliding part of coupling d against c, and causes it to revolve and lift
by means of the friction of the band m upon a when is raised sufficiently high
from the bed n, to admit of the metal article being raised or stamped (which is
effected by the employment of suitable dies secured in a well known manner
upon n) the foot is released from the spring:g, forces. d from c, and the stamp
head falls and the object is carried out.
If is raised too high it comes in contact with the lever a¹ and by the fork 1, the
part d is thrown out of gear, and falls without damage.
In Fig. 3 I shew the lever a' with the fork h detached I here dispense with
the spring g and employ the weight o, the lever a² and treadle i, may be dispensed
with, and the purpose effected by adopting the chain p, with handle
Or I may
transpose the lever a to the right hand side, and shorten the same, so as to be
convenient to the hand of the workman, I should provide a suitable bandle.
9.
The parts unlettered are well known in connection with this class of stamp.
The above being my invention I would observe that I do not limit myself to the

page_text: precise details or arrangement of parts as I may alter or modify the same without.
departing essentially from the principle 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 :-
1st. In Improvements in machinery as employed in stamping or raising of
metallic articles" the combination of the pulley a (loose upon b) with c, one half of
friction coupling thereto and d the other half upon b revolving with it, e on b, and
fon b, g the spring, or its equivalent, o the weight, the fork, and the levers a¹ a
actuated by the treadle i, substantially as herein before described and illustrated
by the drawings.
2nd. The general construction and combination of parts substantially as herein
before described in the foregoing Specification and illustrated by the accompanying
sheet of drawings.
Dated 20th
THOS. KENDRICK,
3, Cherry Street, Birmingham, Agent.
THOS. KENDRICK,
3, Cherry Street, Birmingham, Agent.