Improved Machinery or Apparatus for Stamping Articles in Iron, Steel, and other Metals or their Alloys, and other suitable Substances or Materials, applicable also as a Hand Hammer.
Year: 1893

page_text: Date of Application, 30th Nov., 1893-Accepted, 17th Feb., 1894
COMPLETE SPECIFICATION.
Improved Machinery or Apparatus for Stamping Articles in Iron,
Steel, and other Metals or their Alloys, and other suitable
Substances or Materials, applicable also as a Hand Hammer.
I, GILBERT GLOSSOP, of 13 Greenmount Street, Beeston Hill, in the City of
Leeds, Engineer, 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 :-
The object of my invention is to provide apparatus or machinery for stamping
by pneumatic pressure articles in iron, steel, and other metals or their alloys, and
other suitable substances or materials; my said invention is also applicable as a
hand hammer.
Fig. 4, is a plan of Fig. 3.
Fig. 5, is a detail view of top of cylinder and parts connected therewith.
According to my invention A is a standard resting on and bolted to air
receivers B (C being the lower die block) which are upon a foundation plate D
bolted or other wise secured to the floor.
The upper die block or head E is connected to piston rod F which passes-
through stuffing-box G to piston H working within cylinder J which is bolted on
to the top of the standard A. K is a plunger working in the cylinder case L. The
Baid plunger K abuts against the end of an arm M which is centred upon a pin O
in a bracket Ol which also carries an arm N which is pivoted to a rod P connected
at its lower end to a double lever composed of arms R and S which are centred
at R
The lower end of the arm S is adapted to fit into a slot S₁ in a catch T. At the '
end of the catch T is a spiral spring U, the tension of which is capable of being
regulated by screw V and hand-wheel W for the purpose of regulating the strength
of blow to be given, which can be adjusted to any nicety.
X is the starting lever, being connected to a link Y joined to a rod Z, which is
connected to air valve rod Z¹ of air chest Z. The said air chest is constructed
with "portways" Z³ and Z and "exhaust" Z. Z is the slide valve connected to
valve rod Z, L is the opening or pipe for admitting air above the piston H, and L'
is the opening or pipe for admitting air below the said piston. L³ is the air feed
pipe from air receiver B to air chest Z. Z is a lever (with taper end) pivoted
at Z and connected to rod Z by means of its end working in a slot Z1° upon the
said rod Z, and Z8 is a pin on the upper die block or head E.
The action is as follows :-
-
When the upper die block or head E is resting on catch T, the piston H is about
six inches from the top of the cylinder J.
The lever X is then moved and compressed air is admitted by means of the
valve Z through the top port Z³, into the cylinder J, between the piston and
cylinder cover.
The plunger K by the pressure of the compressed air is forced outward and acts
upon the arm M which in turn acts upon the arm N through the pin O in the
bracket O' by causing the end of the said arm, which is pivoted to the rod. P, to
D

page_text: move upwards, so lifting the said rod and causing the double lever composed of
arms R and S to turn on its centre at R' by which movement the catch T is with-
drawn, the compressed air then expands in the cylinder and propels the upper die
block or head E.
For the purpose of economizing the compressed air I provide the lever Z' and,
pin Z, as before referred to, and their action is as follows:-
-
When the upper die block or head E commences to more downwards as soon as
it leaves the catch T, the pin Z³ strikes the lever Z', which moves the slide valve Z°,
so as to close both ports.
When it is desired to return the upper die block or head E, to its normal position
as when resting on the catch T, the slide valve is again moved to open the top
port to exhaust, and the lower port to admit compressed air under the piston, so as
to raise the said upper die block or head E, which, when it comes in contact with
the taper part of the catch T, forces such catch back, until the upper die block or
head has passed, when the action of the spring U, forces the said catch out again.
On the ascent of the upper die block or head E, the pin Z again strikes the
lever Z', so opening the lower port, to exhaust the compressed air from under the
piston, and the top port to admit compressed air above the piston. The movement
of the slide valve, can be controlled by the hand lever X, without the pin Z³, and
lever Z', when required.
To regulate the force or strength of the blow to be given, the tension of the
spring U is tightened or slackened, as required. If a hard blow is wanted the
spring U is tightened by screwing up the hand-wheel W, a greater pressure will
thus be required in the cylinder J for the plunger K to withdraw the catch T,
owing to the increased resistance of the spring U, which, if its resistance was less
would not require so great a pressure, but as its amount of elasticity is lessened by
screwing up the hand-wheel W it offers increased. resistance to the withdrawal of
the catch T when acted upon by the arm S.
The air receivers B are supplied by a small pump driven by any motive power
(and are connected by means of pipe L' to the air chest).
To use the machine or apparatus as a hand hammer it is only necessary to work
the hand lever X by which means the movement of the "tup" or head can be
regulated to the operators will.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A machine or apparatus for stamping, for the purposes such as set forth,
having the die block or head for giving the blow operated by pneumatic pressure,
substantially as shown and described.
2. A machine or apparatus for stamping, for the purposes such as set forth, in
which the die block or head for giving the blow is held in position preparatory to
giving such blow by a catch which is withdrawn by mechanism interposed between
the said catch and a pneumatic pressure cylinder for giving motion to the said
die block or head and releasing the said catch, substantially as shown and
described.
3. In machinery or apparatus for stamping by pneumatic pressure, for the
purposes such as set forth, the combination of the cylinder J, piston H, plunger K,
arms M and N, bracket O', rod P, arms R and S, catch T, spring U, and
hand wheel W, substantially as and for the purposes shown and described.
4. In machinery or apparatus for stamping by pneumatic pressure, for the
purposes such as set forth, the combination of the lever Z', connected to rod Z, and
pin Z for the purposes shown and described.
5. In a machine or apparatus for stamping by pneumatic pressure, for the
purposes such as set forth, the combination of air chest Z and parts connected
therewith with a rod Z and starting lever X, substantially as and for the purposes
shown and described.

page_text: 6. A machine or apparatus for stamping by pneumatic pressure, for the
purposes such as set forth, which can be operated, when required, as
hammer, substantially as shown and described.
Dated this 8th day of November 1893
a hand
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent to the Applicant.