Improvements in Machinery or Apparatus for Use in Welding Boiler and other Tubes.
Year: 1885

page_text: Improvements in Machinery or Apparatus for Use in Welding
Boiler and other Tubes.
I, GEORGE GAUNT, of 150 Havelock Street, Preston, in the County of Lancaster,
Boiler Maker, do hereby declare the nature of this invention to be as follows:-
This invention relates to machinery or apparatus in which the heated overlapping
edges of the boiler or other tube to be welded are introduced and subjected to
pressure between an upper and (in one arrangement) a lower roller or disc rotated
in opposite directions by worm wheel gearing. A pair of arms one above the other
project horizontally from the standard forming the body of the machine; the outer
extremities of the arms carrying the bearings for the axes or shafts of the upper
and lower rollers respectively. The rollers are fast upon their axes or shafts which
at one side project through the bearing and carry each a worm wheel gearing into
a worm rotated by a shaft mounted in suitable bearings alongside the projecting
arms. The shafts preferably rotate in the same direction, and by arranging the
worms one on the upper and the other on the lower side of the respective worm
wheels the rollers will rotate in the required opposite directions.
The shafts are preferably driven by means of belts; the usual fast and loose pulley
arrangements being provided so that the rotation of the compressing rollers may
be simultaneously arrested or their direction of rotation reversed as required. The
face of the upper roller is hollowed out and that of the lower roller rounded to suit
the circumferential curve of the tube to be welded; the upper roller axis or shaft
working in bearings carried in a sliding block capable of vertical movement and
controlled by a regulating screw above so that the distance or opening between the
faces of the compressing rollers may be adjusted to the required thickness of the
joint to be operated upon.
In another arrangement, for tubes of small diameter which could not be passed
over the lower projecting arm with its attendant mechanism for operating the
lower roller as above described, I employ a traversing bar which slides horizontally
The heated tube to be
through a bearing formed in the body of the standard.
welded is first placed on the front projecting end of the bar which is then forced
outwardly under the compressing roller above being arranged to move at the same
surface speed by means of a worm gearing into teeth or indentations formed in the
side of the bar, the worm being rotated by a shaft having fast, and loose pulley

page_text: arrangements for stopping or reversing the movement of the bar simultaneously
with the compressing roller above. The outer projecting part of the bar is prefer-
ably tapered and after the heated tube has been placed upon it its end is passed
somewhat forward of the upper compressing roller and is caused to rest upon the
top of a travelling supporting table or carriage provided with wheels below which
may be arranged to run upon rails or metals, the table or carriage travelling
with the sliding bar so as to receive the thrust or pressure of the compressing
roller above.
In both arrangements, that is to say, where an upper and a lower roller, or where
an upper roller and a lower sliding bar are employed, suitably mounted rods are
preferably provided which may be so pushed or drawn backwards or forwards (as
the case may be) by the end of the moving tube as to actuate the belt guides and
thereby stop or reverse the direction of rotation of the actuating shafts as may be
required.
I prefer to fasten the joint to be welded by means of rivets at suitable intervals
so that distention during the process of compression may be prevented.
Adjustable guide pulleys or rollers may be arranged either within or outside the
tube to guide it in a straight line and thus ensure the joint to be welded passing
centrally between the upper and lower compressing rollers or sliding bar as the
case may be.
W. LLOYD WISE,
Per F. J. Brougham,
Agent for the Applicant.

page_text: Improvements in Machinery or Apparatus for Use in Welding
Boiler and other Tubes.
.
I, GEORGE GAUNT, of 150 Havelock Street, Preston, in the County of Lancaster,
Boiler 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 machinery or apparatus in which the heated overlapping
edges of the boiler or other tube to be welded are introduced and subjected to
pressure between an upper and (in one arrangement) a lower roller or disc
rotated in opposite directions by worm wheel gearing. A pair of arms one above
the other project horizontally from the standard forming the body of the machine;
the outer extremities of the arms carrying the bearings for the axes or shafts of
the upper and lower rollers respectively. The rollers are (in one arrangement)
fast upon their axes or shafts which at one side project through the bearing and
carry each a worm wheel gearing into a worm rotated by a shaft mounted in
suitable bearings alongside the projecting arms. The shafts preferably rotate in
the same direction, and by arranging the worms one on the upper and the other
on the lower side of the respective worm wheels the rollers will rotate in the
required opposite directions. The shafts are preferably driven by means of belts;
the usual fast and looose pulley arrangements being provided so that the rotation
of the compressing rollers may be simultaneously arrested or their direction of
rotation reversed as required. The face of the upper roller is hollowed out and
that of the lower roller rounded to suit the circumferential curve of the tube to
be welded; the upper roller axis or shaft working in bearings carried in a sliding
block capable of vertical movement and controlled by a regulating screw above
so that the distance or opening between the faces of the compressing rollers may
be adjusted. to the required thickness of the joint to be operated upon.
In another arrangement, for tubes of small diameter which could not be passed
over the lower projecting arm with its attendant mechanism for operating the
lower roller as above described, I employ a 'traversing bar which slides horizontally
through a bearing formed in the body of the standard. The heated tube to be
welded is first placed on the front projecting end of the bar which is then forced
outwardly under the compressing roller above being arranged to move at the same
surface speed by means of a worm gearing into teeth or indentations formed in the
side of the bar, the worm being rotated by a shaft having fast and loose pulley
arrangements for stopping and reversing the movement of the bar simultaneously
with the compressing roller above. The outer projecting part of the bar is
preferably tapered and after the heated tube has been placed upon it its end is
passed somewhat forward of the upper compressing roller and is caused to rest
upon the top of a travelling supporting table or carriage provided with wheels
below which may be arranged to run upon rails or metals, the table or carriage
travelling with the sliding bar so as to receive the thrust or pressure of the
compressing roller above.

page_text: In the accompanying drawings Fig. 1 is a side view partly in section; Fig. 2 a
plan view (also partly in section); Fig. 3 an end back view; and Fig. 4 a sectional
end front view of an arrangement of machinery or apparatus in which two
compressing rollers are employed according to this invention.
a is the upper roller and b the lower roller which are preferably rotated by
bevel pinion wheels c c gearing into teeth in the sides of the rolllers as shewn.
The pinion wheels c c are mounted on the ends of shafts d d their opposite ends
carrying worm wheels ee which gear into a central worm f fast upon the pulley
or driving shaft 3. The shafts and rollers are mounted upon two projecting
arms B B carried on the standard S, the upper arm being hinged or pivotted at h
so as to allow the opening or space between the two compressing rollers to be
varied. A hand wheel j rotates worms and the worm wheel nuts k k on the
regulating screw bolts so that the upper arm may be raised or lowered as
required. The bent spring m holds the upper arm well up to the nuts kk. The
belt shipper or strap fork mechanism n n may be operated either by hand by
means of the handle o or by the pressure of the tube x (see Fig. 4) in its inward
progress against the stop p which is adjustable on the sliding bar q. The com-
pressing rollers may be either fast upon axes or shafts working in bearings at each
side or arranged to run upon fixed studs rr (as shewn in Figs. 3 and 4).
Figs. 5 and 6 are respectively side and front end views of an arrangement of
machinery or apparatus in which an upper compressing roller a and a traversing
bar tare employed for welding tubes of small diameter.
The roller a is mounted on the end of an upper arm B pivotted at its other end
and provided with regulating screws and other mechanism of the character
described with reference to the previous arrangement. The bar t (which is pre-
ferably tapered so as to be suitable for welding conical tubes slides through a hole
or bearing in the standard S receiving motion from a-worm w gearing into teeth or
indentations uu on the lower side of the bar. C is the travelling supporting table
or carriage running on rails' v v. The heated tube may be welded or compressed
between the roller a and the bar t with the bar traversing in either direction that
is to say either inwardly or outwardly, and any of the usual well known arrange-
ments (or of the kind shewn in Figs. 2 and 3) of stop rod mechanism may be
employed for operating the belt shipper or strap fork. By means of bevel gearing
and connecting shafts the worms f and w may be actuated from the same fast and
loose pulley driving shaft so as to ensure the same surface speed and reversing the
motion simultaneously of the compressing roller and the traversing bar.
In both arrangements, that is to say, when an upper and a lower roller, or where
an upper roller and a lower sliding bar are employed, suitably mounted rods are
preferably provided which may be so pushed or drawn backwards or forwards (as
the case may be) by the end of the moving tube as to actuate the belt guides and
thereby stop or reverse the direction of rotation of the actuating shafts as may be
required.
I prefer to fasten the joint to be welded by means of rivets at suitable intervals
or a grooved and tongued "scarfing" so that distention during the process of
compression may be prevented.
•
Adjustable guide pulleys or rollers may be arranged either within or outside the
tube to guide it in a straight line and thus ensure the joint to be welded passing
centrally between the upper and lower compressing rollers or sliding bar as the
case may be.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. The use or employment of two compressing, rollers rotated in opposite
directions substantially as described and shewn in the drawings for the purpose

page_text: 2. The use or employment of a rotating compressing roller in conjunction with
a traversing bar substantially as described and shewn in the drawings for the
purpose set forth.
3. The improved machine or apparatus constructed, arranged, and operating
substantially as described with reference to Figs. 1, 2, 3, and 4 of the drawings for
the purpose set forth.
4. The improved machine or apparatus constructed, arranged, and operating
substantially as described with reference to Figs. 5 and 6 of the drawings for the
purpose set forth.
Dated this 3rd day of September 1886.
Witness:
YATES W. BOOTH,
Patent Agent,
Preston, Lancashire.
GEORGE GAUNT.