Improvements in Draw Benches.
Year: 1896

page_text: Date of Application, 29th Feb., 1896
Complete Specification Left, 30th Nov., 1896-Accepted, 6th Feb., 1897
Certain Improvements in Draw Benches.
I, GEORGE PLATT, of the Firm of Samuel Platt, of King's Hill Foundry,
Wednesbury, in the County of Stafford, Engineer do hereby declare the nature of
this invention to be as follows:-
This invention has reference to draw benches for drawing tubes, rods, metal
strips and the like and consists of the hereindescribed improved means for
operating the jaws by which the tube rod strip or mandril is held in the waggon
whilst being drawn through the die. By my invention the said jaws can be very
quickly caused to grip and release the rod tube mandril or metal strip.
In carrying out this invention the gripping jaws are made in the form, of two
sliding blocks arranged in a cavity in the back part of the waggon the said cavity
being open at the top and having its sides inclined and the blocks are corre-
spondingly inclined so that when the blocks are moved towards the back end of the
waggon the inclines will move the said blocks towards each other to grip the tube
rcd mandril or strip between them, and when the blocks are moved in the opposite
direction the blocks will still follow the inclines and move apart so as to release
the rod tube mandril or strip. In order to make the said blocks move apart as
aforesaid each block has one or more parallel grooves in which fit a corresponding
parallel projecting strip or strips formed on the recess in the waggon the said
strips and groove being inclined towards each other parallel with the inclined sides
of the waggon. Or the said grooves may be formed in the waggon and the pro-
jecting strips be formed on the blocks and act in a similar manner, namely to
cause the blocks to move apart and release the rod, tube mandril or metal strip
when the blocks are moved towards the front of waggon as stated above. By the
front of the waggon I mean that end which is in front when the rod tube mandri!
or strip is being drawn through the die. In order to operate the said blocks
I provide a lever which stands up from the waggon and turns on a fulcrum pin
carried thereby above the blocks and this lever is made with two arms which
engage in corresponding recesses in the blocks so that when the upper arm of the
lever is gripped by the hand and moved towards the front of the waggon the
blocks will be moved in the opposite direction and simultaneously will by their
inclines be caused to move towards each other to grip the rod tube mandril or strip,
and when the hand lever is moved in the opposite direction namely towards the
back of the waggon the sliding blocks will be moved towards the front of the
waggon and also move apart to release the tube rod mandril or strip.
Dated this 28th day of February 1896.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.

page_text: Corcare provements in Draw Denones.
1, GEORGE PLATT of the Firm of Samuel Platt, of King's Hill Foundry,
Wednesbury, in the County of Stailord, 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:-
This invention has reference to draw benches which are used for drawing tubes
rods metal strips and the like, and this invention consists of the hereindescribed
improved means for operating the gripping jaws by which the tube rod strip or
mandril is held in the waggon whilst being drawn through the die. By my
invention the snid gripping jawa can be very quickly moved to and fro and caused
to grip or relense the tube rod mandril or metal strip and both jaws will move
together so that their two gripping faces advance or retire equally which is
important to prevent any side strain on mandril tube rod or metal strip which is
being drawn.
On the accompanying drawings
Fig. is a plan of a draw-bench waggon with my invention applied; Fig. 2 is
an elevation of the same partly in section;
Fig. 3 is a back elevation of the waggon; Fig. 4 is a plan of the back part of
the same shewing the gripping jaws open;
Fig. 5 is a front and side elevation of the hand lever for operating the gripping
jaws;
Fig. 6 is a separate view of one of the gripping jaws;
Fig. 7 is a sectional plan of the back part of the waggon with the gripping jaws
removed;
Fig. 8 is a back elevation of the waggon illustrating a slight modification of
my invention;
Fig. 9 is a separate view of one of the gripping jaws belonging to the waggon
shewn by Fig. 8;
Fig. 10 is a back elevation and Fig. 11 is a plan of another form of the gripping
jaws.
The same letters of reference indicate the same or corresponding parts in all
the figures of the drawings.
A is the draw bench waggon,
are the four wheels of the same which
run along the top of the draw bench and C is the counterbalanced lever which is
hooked at the front end c' to engage with the draw-bench chain. These parts are
well known.
D'D' are the two gripping jaws which, for the purposes of this invention, are
made in the form of two sliding blocks arranged in the cavity a' in the hack of
the waggon A this cavity being open at the top and having its sides a² a inclined
towards the back of the waggon. The sides d' of the blocks D' D are corre-
spondingly inclined towards the back of the waggon so that when the blocks are
moved towards the back end a of the waggon, (that is in the direction indicated
by the arrow in Fig. 1) the inclines a a' will move the blocks or gripping
jaws D D towards and parallel with each other to grip the tube rod mandril or
strip between them. In order to make the blocks move apart and keep parallel
with each other when the blocks or jaws are moved in the opposite direction so
as to release the tube rod mandril or strip, I make each of the blocks D D with
a parallel groove parallel with the inclined side of the block, and on the
bottom of the cavity a of the draw-bench waggon I provide two parallel pro-
jeeting strips at a which are respectively parallel to the inclined sides a a of the

page_text: cavity al so that when the blocks D D are moved back as aforesaid these
strips a a fitting respectively in the grooves in the blocks or jaws D' D' will
cause the blocks or jaws to follow the inclines a' a and to move apart and remain
parallel with each other as they release the rod tube strip or mandril. In order
to operate the blocks D' D' as aforesaid I provide a hand lever E which stands
up from the waggon and turns on a fulcrum pin carried by ears or lugs a' a
formed on the top of the waggon above the blocks D' D' and this lever E is made
with two downwardly projecting arms el which respectively engage in corre-
sponding recesses 3 in each of the blocks D so that when the upper part of the
hand lever E is gripped and removed forward to the position shewn in Figs. I
and 2 the blocks D D will be moved in the opposite direction and simultaneously
will by the inclines a² a as a be caused to move towards cach other with their
gripping faces parallel with each other to grip the tube rod mandril or strip;
and when the hand lever E is moved in the opposite direction namely towards the
back of the waggon as indicated by the dotted lines in Fig. 2 and as shewn by
Fig. 4 the sliding blocks or jaws D D will be moved towards the front of the
waggon and by the inclines will be simultaneously caused to move apart and
release the tube rod mandril or strip. The gripping faces d' of the blocks D' D'
are formed with backwardly projecting teeth as usual to grip the rod tube mandril
or strip. These faces may as is well known be flat as in Figs. 1, 2, 3, 4, 6 and 9
or recessed as in Figs. 10 and 11 according to the sizes of the strip rod mandril or
the like which they are designed to grip.
Instead of the inclined parallel strips being formed on the draw-bench waggon
in combination with grooves d in the blocks or jaws D D as above described
and illustrated by Figs. 1, 2, 3, 4, 6 and 7, it will evident that without departing
from the nature of my invention this arrangement may be reversed as shewn in
Figs. 8 and 9, that is to say, a parallel strip d may be formed on each of the
jaws or blocks D' D' parallel with the inclined sides of the same and arranged
to engage with corresponding parallel grooves a ao formed in the bottom of the
cavity a' in the waggon parallel with the inclined sides a a³ of the same.
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. In combination in a draw-bench waggon, the two inclined sliding gripping
jaws or blocks fitting in a recess in the back of the waggon said recess being made
with inclined sides and inclined strips or grooves parallel with said sides to engage
with said blocks to cause them to move apart equally when moved towards the
front of the carriage and to move towards each other equally when moved in the
opposite direction and the hand lever standing up from the waggon and turning
on a fulcrum pin above the gripping blocks and made with two arms engaging in
recesses in the blocks for moving the blocks to and fro all substantially as herein-
before set forth.
2. The combination of a draw-bench waggon made with the recess a' in the
back thereof said recess being made with the inclined sides a a inclined towards
the back and with inclined strips us a at the bottom parallel with said inclined
sides, the two inclined sliding gripping jaws or blocks D D fitting in the said
recess and made with grooves d to engage the strips aas, the hand lever E
standing up from the waggon and turning on a fulcrumm thereon above the gripping
jaws and made with the two arms e engaging in the recesses in the blocks,
the said parts being constructed arranged and combined together substantially as
described and shewn by Figs. 1, 2, 3, 4, 5, 6 and 7 so that when the hand lever is
moved towards the back of the carriage the blocks will be moved apart equally
and towards the front of the carriage, and when the hand lever is moved in the
opposite direction the said gripping blocks will be moved equally towards each
other and towards the back of the carriage substantially as set forth.
3. The combination of a draw-bench waggon made with the recess a' in the

page_text: back thereof said recess being made with inclined sides a' a inclined towards the
back and with inclined grooves a al in the bottom parallel with the sides, the two
inclined sliding gripping jaws or blocks D' D' fitting in snid recess and made with
projecting strips ds on the bottom parallel with the inclined sides and fitting and
engaging in the grooves a a, the hand lever E standing up from the waggon
and turning on a fulcrum thereon above the gripping jaws and made with the two
arms engaging in the recesses in the blocks, the said parts being con-
Etructed arranged and combined together substantially as described and shewn
more particularly by Figs. 8 and 9 so that when the hand lever is moved towards
the back of the carriage the blocks will be moved apart equally and towards the
front of the carriage, and when the hand lever is moved in the opposite direction
the said gripping blocks will be moved equally towards each other and towards the
back of the carriage substantially as set forth.
Dated this 27th day of November 1896.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.