Improvements in Apparatus for Bending or "Setting" Metal Plates.
Year: 1894

page_text: Date of Application, 19th June, 1894
Complete Specification Left, 5th Feb., 1895-Accepted, 6th Apr., 1895
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Bending or "Setting" Metal Plates.
I, CHARLES DAVID DOXFORD of Pallion Yard, Sunderland in the County of
Durham, Shipbuilder, do hereby declare the nature of this invention to be as
follows:-
This invention relates to apparatus for bending or "setting" metal plates and is
especially applicable for producing what are known as "joggling" plates for
ship-building and other purposes that is to say plates each having one or more
edges and or ends so set as to enable two such plates while rivetted or
otherwise secured together by incans of the said edge (forming a lap joint) to be
in the same plane.
"
The invention consists of a machine somewhat like a circular-cutter shearing
machine but instead of the circular cutters I use preferably four rollers two on
each of the rotating shafts.
The
Each set of these rollers comprises two of different diameters the larger roller
of one set being opposite the sinaller roller of the other set and vice versa.
larger rollers are rigidly secured to and rotate with their shafts, and the smaller
rollers are loose upon said shafts which are geared together so that the adjacent
surfaces of the rollers rotate in the same direction.
The rollers are retained at any desired distance apart to suit the thickness of
metal plate to be operated upon, this distance being adjustable in a manner similar
to the distance between the centres of the cutters of an ordinary circular cutter
shearing machine.
Instead of employing four rollers two of smaller and two of larger diameters,
I may employ in all two rollers each formed of two diameters and rigidly secured
on their shafts.
This would however not be so satisfactory as the first described arrangement by
reason of the friction which would be produced by the larger and smaller parts
of the rollers rotating at the same speed in contact with the same plate.
The larger rollers or portions of the rollers which are preferably rounded at
their adjacent corners may be regarded as those by which the actual" setting" of
the plates is effected. The smaller rollers or portions of rollers serving to support
the plates against the pressure of the larger rollers. If desired, instead of the
smaller rollers or portions of rollers I may, but with less satisfactory results, use
fixed supports.
Dated this 19th day of June 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
Improvements in Apparatus for Bending or "Setting" Metal Plates.
I, CHARLES DAVID DOXFORD, of Pallion Yard, Sunderland, in the County of
Durham, Shipbuilder, 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 apparatus for bending or "setting" metal plates and is

page_text: "
especially applicable for producing what are known as 'joggling" plates for
ship-building and other purposes that is to say plates each having one or more
edges and or ends so "set as to enable two such plates while rivetted or otherwise
secured together by means of the said edge (forming a lap joint) to be in the same
plane.
Figure 1 is a side elevation, and
Figure 2 an end elevation of a machine constructed according to my invention,
Figure 3 being a plan of part of the machine, in section on the line 3, 3, of
Figure 1.
Like letters indicate like parts throughout the drawings.
"
A is the frame of the machine. B is a rotatable shaft jornalled therein below
the gap A. C is another rotatable shaft above the gap. On the shaft B is a
set of
"fast" and "loose rollers B' B, and on the shaft C is a set of similar
rollers C'C'. The larger rollers BC are the "fast" rollers, that is to say,
are secured to the shafts B and C and rotate therewith. The smaller rollers B³ C³
are the "louse" rollers that is to say they are free to rotate independently
of the shafts B and C. The larger roller in each set is arranged to be opposite
the smaller roller in the other set, and the shafts B and C are genred together
in the manner hereinafter described; the gearing is provided so that the adjacent
surfaces of the rollers B'C' shall be moved in the same direction and the
above-named arrangement of the larger and smaller rollers is adopted in onler
that the edge of a plate passed between the two sets of rollers shall by their
combined action be given some such form as is indicated in the section of a
plate shown in process of treatment in Figure 1. A is a guide, movable
towards or away from the rollers to vary the depth of the gap, by means of
haud-operated bevel gear which as shown is mounted on the guide and actuates
a
screw A, the latter being engaged with a screwed bush A fixed in the
frame. The sets of rollers are adjustable and are retained at any desired
distance apart to suit the thickness of metal to be operated upon; one end of
the shaft C turns in a block D pivotted within the frame A on the pin E
the other end turning in a block F, which is adjustable vertically between the
side walls of the frame A by a screwed rod G which engages at its lower end
with the block F. His a worm-wheel rotatable in a bearing in the frame A
and provided with a long internally-threaded boss H¹ which constitutes a nut
for the screwed rod (i. is a hand-operated worm geared with the worm
wheel H, by turning which the block F and shaft C and its rollers C³ ³ can
be raised or lowered as desired.
The shafts B and C are geared together by pinions B³ C' secured thereon, and
are driven by worm-wheel secured on the shaft B and rotated by a worm K
which is turned by any convenient means, such as the well-known arrrangement
indicated in the drawings. The larger rollers RC which are preferably rounded
as shown at their adjacent sides may be regarded as those by which the actual
setting of the plate is effected, the smaller rollers BC serving to support the
plate against the pressure of the larger rollers; being loose on the shafts the
rollers B C act on the plate without undue friction seeing that they are free to
be revolved by it. The means whereby the rollers are secured in place are such
that other rollers can be readily substituted therefor to suit different plates and
different bends. If desired I may use, instead of the rollers B C fixed supports,
but with less satisfactory results. Moreover the fast and loose rollers need not be
concentric, nor need each set be borne by a single shaft. Lis a crane with a
traveller, forming a convenient appurtenance to the machine for handling the
plates on which it works.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is
1. In apparatus for bending or "setting" metal plates the combination with a

page_text: roller such as B' or rollers operatively connected with driving-mechanism therefor
of a roller such as B or rollers free to rotate independently of the driving-
mechanism, substantially as and for the purpose specified.
2. In apparatus for bending or "setting" metal plates the combination with a
rotatable shaft such as B of fast and loose rollers such as B1 and B2 of different
diameters substantially as and for the purpose specified.
3. In apparatus for bending or "setting" metal plates two sets of fast and loose
rollers such as B' B² C'C' arranged and operating substantially as and for the
purpose specified.
4. In apparatus for bending or "setting" metal plates the combination with two
rotatable shafts such as B and C fast and loose rollers such as B B and C₁ C² of
mechanism for adjusting one shaft relatively to the other substantially as and for
the purpose described and illustrated in the accompanying drawings.
5. The combination and arrangement of parts constituting a complete apparatus
for bending or "setting" metal plates substantially as described and illustrated in
the accompanying drawings.
Dated this 28th der of Jouwere 1905
CHAS. D. DOXFORD.
Boult & Wade,
Agents for the Applicant-