Improvements in or relating to Power Hammers and the like.
Year: 1899

page_text: Date of Application, 12th Oct., 1899
Complete Specification Left. 29th June, 1900 -Accepted, 4th Aug., 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Power Hammers and the like.
I, ARTHUR LANGLEY, Engineer, of Bellefield Works, Sheffield, in the County
of York, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in power hammers and the like its
object being to lessen the vibration and shock to which parts of such tools are
subjected during their operation.
In carrying out this invention I connect the rod carrying the "tup" or hammer
head carrier, to a piston, the rod or the piston working in guides. Power is
transmitted to the piston from say, a crank-disc and connecting rod, through a
spring preferably a spiral spring: One end of this spring is attached to the
connecting rod and the other end rests upon, or is connected to the top of the
piston.
Underneath the piston and so arranged that it is compressed during the down
stroke, is another spring, preferably spiral and of approximately the same
strength as the first spring. This second spring causes or assists the upstroke of
the hammer.
Conveniently the piston and springs are placed in a cylinder the lower end of
which forms a guide for the rod and a support for the lower spring.
I am aware that power hammers have been made in which the connecting rod
is joined to the "tuprod by means of two flat springs the lower spring being
directly connected to the "tup" rod, but such an arrangement causes considerable
vibration and strain in the springs, and consequently they frequently break.
This invention is particularly applicable to power hammers working with a
quick stroke, such as are used for working thin substances, file steel for
example.
Dated this 12th day of October 1899.
BOULT, WADE & KILBURN,
Agents for the Applicant.
Improvements in or relating to Power Hammers and the like.
I, ARTHUR LANGLEY, Engineer, of Bellefield Works, Sheffield, in the County
of York, 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:-
-
This invention relates to improvements in power hammers and the like its
object being to lessen the vibration and shock to which parts of such tools are
subiected during their operation.

page_text: In carrying out this invention I connect the rod carrying the "tup" or hammer
head carrier, to a piston, the rod or the piston working in guides. Power is
transmitted to the piston from say, a crank-disc and connecting rod, through a
spring preferably a spiral spring. One end of this spring is attached to the
connecting rod and the other end rests upon, or is connected to the top of the
piston.
Underneath the piston and so arranged that it is compressed during the down
stroke, is another spring, preferably spiral and of approximately the same
strength as the first spring. This second spring causes or assists the upstroke of
the hammer.
Conveniently the piston and springs are placed in a cylinder the lower 'end of
which forms a guide for the rod and a support for the lower spring.
In the accompanying drawings
Figure 1 is a front elevation partly in section of one construction of power
hammer according to this invention.
Figure 2 is a side elevation of the same, and
Figure 3 is a plan of a portion of the machine, parts being removed for the
sake of clearness.
Like letters indicate like parts throughout the drawings.
On a frame A are bearings B on which a shaft C is carried. A clutch box C
of a friction clutch C₁ is loose on the shaft C and carries the driving belt for
transmitting power to the hammer. In operation the friction clutch C which is
keyed on to the shaft and capable of lateral movement upon it is moved towards
the clutch box C2 with which it engages. The withdrawal of the clutch C¹
from its box C2 causes the stoppage of the hammer.
Upon the crank disc E is a pin F which may, if desired, be adjustable with
regard to its distance from the centre of the disc. The crank pin Fengages with
one end of a connecting rod G, the other end of this rod being attached to lugs H²
upon the cover H¹ of a cylinder H. This cylinder H is furnished with guides K¹
which engage with slide bars K which are secured to the frame A. This arrange-
ment ensures that the cylinder shall move up and down in a vertical plane under
the action of the crank and connecting rod. Lugs K2 are formed on the slide
bars K in order that a strengthening bar may be attached to keep the slide bars
rigid. Within the cylinder H is a piston L carrying a rod L¹ to which is
attached a hammer tup M. Above the piston L and between it and the cylinder
cover H¹ a volute spring L is placed, kept in position by a boss H3 on the under-
side of the cover, and a similar spring L³ is placed beneath the piston encircling
the rod L and resting at its lower extremity against the lower end of the
cylinder. Beneath the hammer tup M is placed an anvil N of any usual con-
struction.
The springs L2 and L³ being situated upon each side of the piston L serve very
efficiently to lessen the vibration and shock to which the tool would otherwise be
subjected when in action. They also serve to assist the motion of the piston at
the beginning of each up and down stroke, for at the end of each stroke one or
other of the springs will be compressed.
Although the arrangement described, in which springs are placed above and
below a piston in a sliding cylinder, is preferred, yet if desired the piston may
be attached to the lower end of the connecting rod by means of a spring, and the
spring beneath the piston may be supported upon fixed guides through which the
piston rod moves.
I am aware that power hammers have been made in which the connecting rod
has been joined to the tup rod by means of two flat springs, the lower spring
being directly connected to the rod, but such an arrangement causes considerable
vibration and strain in the springs and consequently they frequently break.
This invention is particularly applicable to power hammers working with a
quick stroke, such as are used for working thin substances, file steel for
example.

page_text: Having now particularly described and ascertained the nature of my
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. In a power hammer the combination with a sliding cylinder or guide of a
piston having springs above and beneath it arranged and operating substantially
as described.
2. In a power hammer the combination with a piston carrying a hammer of
springs above and beneath it substantially as and for the purpose described.
3. In a power hammer the combination with a sliding cylinder H of a piston L
and springs L² L³ substantially as described.
4. The complete power hammer substantially as described or illustrated in the
accompanying drawings.
2011
2000
ARTHUR LANGLEY.
Boult, Wade & Kilburn,
Agents for the Applicant.