Improvements in Machines or Hammers for Flattening and Planishing Metal Plates.
Year: 1893

page_text: Date of Application, 19th Sept., 1893
Complete Specification Left, 19th June, 1894-Accepted, 21st July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Machines or Hammers for Flattening and
Planishing Metal Plates.
I, WILLIAM JAMES ROBINSON of 11 Eastnor Street Hulme, Manchester in
the County of Lancaster Engraver's Plate Maker do hereby declare the nature of
this invention to be as follows:-
This invention relates to improvements in machines for hammering, flattening
and planishing metal plates, and the object of the improvements is chiefly to effect
the variation in the rise and fall of the hammer in a more ready and convenient
manner than has hitherto been done.
For this purpose the machine may be constructed in the following way:-A
double frame braced together or au equivalent structure is provided with two
vertical slides facing each other, at the upper portion. In these slides are fitted
sliding blocks forming bearings which carry between them a rocking shaft, this
said shaft forming the fulerum of the hammer. The arm, lever or shaft of the
hammer is arranged as a lever of the first order, a longer part on one side of the
fulcrum carrying the hammer head, and a shorter part on the other side of
the fulcrum being connected to a tension spring, which spring is attached to the base
of the frame at its other end. The tension of this spring may be regulated by a
screw nut.
The vertical adjustment of the fulcrum is effected by the use of a vertical screw
in each slide which is connected to the slide block and is raised or lowered by a nut
or equivalent upon the top of the slide, or which is screwed through the block and
causes the block to rise and fall by turning said screw round for which purpose it
is provided with a handle.
In place of the screw the sliding blocks may be operated by racks and
pinions.
-
The hammer is operated by being pulled or pressed down by the hand, or by a
treadle or foot motion arranged in any convenient way.
D
....
1
1000
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.
Improvements in Machines or Hammers for Flattening and
Planishing Metal Plates.
I, WILLIAM JAMES ROBINSON of 11 Eastnor Street, Hulme, Manchester, in
the County of Lancaster, Engraver's Plate Maker, 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 machines for hammering, flattening
and planishing metal plates, and the object of the improvements is chiefly to effect
the variation in the rise and fall of the hammer and strength and direction of blow
in a more ready and convenient manner than has hitherto been done.

page_text: Fig. 2. an end view
Fig. 3. a plan and
Fig: 4. a detail of the same.
For the purpose of carrying the invention into effect, the machine may be
constructed in the following way: Two side frames a. a are connected at the bottoni
by cross-stays b. b preferably formed with a connecting rail, and at the top by a
cross rail e. The side frames are each formed with a vertical slide a' at the upper
portion the slides facing each other. Into the slides are fitted two sliding blocks d
forming bearings which carry between them a rocking shaft e, this shaft forming the
fulcrum of the hammer. The arm, lever or shaft of the hammer is arranged as
a lever of the first order, a longer part on one side of the fulcrum carrying the
hammer head and a shorter part on the other side of the fulcrum being connected
to a tension spring. The spring may be a flat spring has shown fixed to the front
bottom cross rail and connected to the hammer shaft by a connecting rod i which
may be made adjustable in length in any usual manner. Or the spring may be a
helical spring connected at one end to the hammer shaft and at the other to the
back cross rail or a bracket attached to the same, and its tension regulated by a
screw and nut in the ordinary manner.
The vertical adjustment of the fulcrum is effected by means of screws / threaded
through the blocks and resting in sockets a of the frames and held in their
places by collars, which screws can be turned by handles m for raising or
lowering the blocks. Or the blocks may have screws fixed to them passing through
nuts fitted with handwheels and turning in bearings on the cross rail e or equivalent
mechanism for raising and lowering the blocks, such as racks and pinions, with
locking devices, may be employed.
In the machine shown on the drawings the bammer is operated by being
pulled or pushed down by hand upon the anvil a, but the shatt may be connected
by 2 rod to a treadle operated by the foot arranged in any convenient manner.
By raising or lowering the slide blocks the hammer head is raised or lowered and
its distance from the anvil and force of blow regulated, the hammer head being
raised by the spring. By adjusting the block on one side higher than that on the
other side, the rocking shaft and hammer head are tilted, so that an inclined or side
blow can be given on the plate to be planished, as may be required for driving the
metal to fill up cavities or close holes in copper or brass plates. For this purpose
the rocking shaft is supported on cupped or coned centres in the blocks as shown,.
or barrelled bearings may be used.
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. The general arrangement or combination of parts of a machine or hammer
for flattening and planishing plates substantially as hereinbefore described and
illustrated by the drawings.
2. In machines or hammers for flattening and planishing metal plates the
arrangement of supporting the hammer rocking shaft in slide blocks separately
adjustable in height, substantially as hereinbefore described.
Dated the 10th
1004
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.