Improvements in Apparatus for Trueing Flanged Openings in Boiler Plates, and for other Trueing or Expanding Operations.
Year: 1893

page_text: Date of Application, 31st July, 1893
Complete Specification Left, 28th Apr., 1894-Accepted, 7th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Trueing Flanged Openings in Boiler
Plates, and for other Trueing or Expanding Operations.
We JOHN BROWN AND COMPANY LIMITED of Atlas Works Sheffield in the
County of York and JOSEPH NODDER of the same place Ironworks Manager
do hereby declare the nature of this invention to be as follows:-
:-
The object of this invention is to provide an apparatus for use in trueing flange:1
openings in boiler plates or for other trueing or expanding operations which
apparatus is so constructed that it can be used to operate in openings varying very
considerably in size.
In an apparatus constructed according to this invention the devices (preferably
rollers) which are revolved and moved outwards to effect the trueing or expanding
have their outward movement imparted to them by means of mechanism which can
be operated from the outward part of the apparatus. This can be effected by
mounting the said devices (we will refer to them as rollers) on pins or centre:
which project from sliders sliding in radial guideways formed in a carrier which is
rotated in any suitable way for example by a bevel pinion gearing with a bevel
wheel or circular rack fixed to or formed on the carrier. For large work such as
for trueing the flanged openings or furnace mouths in boiler fronts the carrier is
supported upon a table or base provided with a central socket for receiving a
central stem on the carrier and with a circular series of runners upon which the
carrier is supported and moves as it is rotated. The outward movement of the
rollers which effect the trueing or expanding can be effected by mounting screws
in the radial guideways the said screws or one or more of them being provided at
their outer end with a projecting squared piece for receiving an instrument for
rotating the screws. The said screws each pass through a screw box formed or
fitted in the respective slider which carries a trueing or expanding roller so that as
the screws are rotated the rollers are moved outwards or inwards as required. In
order to ensure a synchronous or equal movement of the rollers the inward ends of
the screws may be provided with pinions which gear with a central pinion so that
movement of either of the screws will cause an equal movement to be transmitted
to the other screw or screws and consequently to the roller or rollers outward or
inwards.
DAL 01 JL..1.. 1902
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Trueing Flanged Openings in Boiler
Plates, and for other Trueing or Expanding Operations.
We JOHN BROWN & COMPANY LIMITED of Atlas Works, Sheffield in the
County of York and JOSEPH NODDER of the same place Ironworks Manager
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 this invention is to provide an apparatus for use in trueing flanged
openings in boiler plates or for other trueing or expanding operations which

page_text: -
apparatus 18 so constructed that it can be used to operate in openings varying very
considerably in size.
In an apparatus constructed according to this invention the devices, (preferably
rollers) which are revolved, and moved outwards, to effect the trueing or expanding,
have their outward movement imparted to them by means of mechanism which
can be operated from the outward part of the apparatus. This can be effected by
mounting the said devices (we will refer to them as rollers) on pins, or centres,
which project from sliders sliding in radial guideways formed in a carrier which is
rotated in any suitable way, for example by a bevel pinion gearing with a bevel
wheel, or circular rack, fixed to or formed on the carrier.
For large work such as for trueing the flanged openings, or furnace mouths, in
boiler fronts, the carrier is supported upon a table or base, provided with a central
socket for receiving a central stem on the carrier, and with a circular series of
runners upon which the carrier is supported and moves as it is rotated. The
outward movement of the rollers which effect the trueing, or expanding can be
effected by mounting screws in the radial guideways the said screws, or one or more
of them, being provided at their outer end with a projecting squared piece for
receiving an instrument for rotating the said screws. The said screws each pass
through a screw box formed or fitted in the respective slider which carries a trueing
or expanding roller, so that as the screws are rotated the rollers are moved
outwards, or inwards as required. In order to ensure a synchronous or equal
movement of the rollers the inward ends of the screws may be provided with
pinions which gear with a central pinion so that movement of either of the screws
will cause an equal movement to be transmitted to the other screw, or screws, and
consequently to the roller or rollers, outwards or inwards.
In order that the invention may be well understood we will describe with reference
to the accompanying drawings, the manner in which it can be carried into practical
effect as applied to work of the larger kinds. Figure 1 is a plan, and Figure 2 is a
vertical view one half being in elevation and the other half in section, of apparatus
constructed in accordance with this invention. A is a foundation stone, or bed
plate made of ashlar stone, or other suitable material, upon which is secured the
standard B, in which is mounted the central stem c of the table or carrier C which
is rotated by the bevel piniou d, on the shaft D mounted in standards, (one of
which is shewn at d²) and driven by any suitable motor, the said pinion d gearing
with a circular rack c³ secured to the underside of the table or carrier C. The said
table or carrier C is supported by and is rotated upon rollers e mounted in
standards E. c³ are radial guideways in the table C.
Fare sliders capable of sliding in the said radial guideways the said sliders
being provided with pins on which are mounted the rollers G. H are screws
mounted in strap pieces hand in hearings in the table C in which they can be
rotated without longitudinal movement, by a key applied to their squared ends h³.
The inner ends of the screws H are provided with bevel pinions h³, which all gear
with the pinion I, mounted in a bearing at the centre of the table, or carrier C. In
operating upon an opening, (a flanged opening in a boiler front for instance) the
rollers G are adjusted by means of the screws H so that the flanged opening can
be placed over them and the table or carrier, C is rotated by driving the shaft D,
and the screws H, are operated so as to move the rollers G outwards so as to true.
or true and expand the said opening. As the screws are connected by the
gearing I, the operation of each of them is equally cominunicated to the others.
Although we have shewn three rollers and their operative parts we do not limit
ourselves to that number, nor do we limit ourselves to the precise details shewn, as
they may be varied without departing from the nature of this invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1. In apparatus for trueing or expanding (or both) the combination of devices

page_text: which can be revolved and moved radially by mechanism operated from the outward
part of the apparatus substantially as herein before described.
2. In apparatus for trueing, or expanding (or both), the combination with a
rotatable carrier, or table, of rollers, or the like which are mounted on sliders
capable of being moved radially upon or in, the said rotatable carrier or table
substantially as hereinbefore described.
3. An apparatus for trueing or expanding (or both) consisting of the arrangement
and combination of parts substantially as herein before described and illustrated in
the accompanying drawings.
Dated this 28th day of April 1894.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, Agents.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, Agents.