IMPROVEMENTS IN TUBE BEADERS
Year: 1882

page_text: LETTERS PATENT to John Albert Frieake and Thomas McCormick both
of No. 36 Seething Lane in the City of London for an Invention of
"IMPROVEMENTS IN TUBE BEADERS."
PROVISIONAL SPECIFICATION left by the said John Albert Frieake and
Thomas McCormick at the Office of the Commissioners of Patents on the
27th March 1882..
JOHN ALBERT FRIEAKE and THOMAS MCCORMICK both of No 36 Seething Lane
in the City of London "IMPROVEMENTS IN TUBE BEADERS"
In the Specification to Selkirk's Patent of the 19th June 1877 No 2374 was
described a construction of tool for upsetting and beading the ends of boiler tubes.
In that tool serrated pieces are made by the movement of a taper mandril to slide
out radially and so to take a firm hold in the interior of the tube so as to resist the
beading strain, but it has been found difficult to release the hold taken by these
pieces when the tool has to be removed. Now the object of our invention is to
provide in a tube beading tool of the kind described in the Specification above
referred to, means of automatically releasing the gripping pieces which we effect
in the following manner. We give these pieces an inclined shape on their inner
faces and fit them to slide along inclined beds formed on a boss of the mandril of
the tool so that when the mandril is pushed in from the operator by turning a
screw that passes through the centre of the mandril and that has a head engaged
in notches in the sliding pieces, they are caused to move outwards radially and so
to take firm hold within the tube. The sides of the sliding pieces are made dove-
tailed and move in dovetailed recesses formed in the boss of the mandril so that
when the central screw is turned in the opposite direction, the pieces are drawn
radially inwards and are thus caused to release their grip on the tube. Instead of
employing dovetailed pieces and recesses the pieces may be made of the section of
an inverted T the two projecting ribs of each moving along corresponding chases
in the recess of the mandril boss. Or the pieces and recesses may be made with
parallel sides, and each piece may have cut along its side an inclined chase in which
engages the point of a set screw fixed in the mandril boss.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Albert Frieake & Thomas McCormick in the Great Seal
Patent Office on the 26th September 1882.
JOHN ALBERT FRIEAKE and THOMAS M CORMICK both of No. 36 Seething Lane
in the City of London "IMPROVEMENTS IN TUBE BEADERS."
In the Specification to Selkirk's Patent of the 19th June 1877 No 2374 was
described a construction of tool for upsetting and beading the ends of boiler tubes.
In that, tool serrated pieces are made by the movement of a taper mandril to slide
out radially and so take a firm hold in the interior of the tube so as to resist the
beading strain, but it has been found difficult to release the hold taken by these
pieces when the tool has to be removed. Now the object of our invention is to
provide in a tube beading tool of the kind described in the Specification above referred
to, means of automatically releasing the gripping pieces which we effect in the
following manner. We give these pieces an inclined shape on their inner faces and
fit them to slide along inclined beds formed on a boss of the mandril of the tool so
that when the mandril is pushed in from the operator, by turning a screw that
passes through the centre of the mandril and that has a head engaged in notches
in the sliding pieces, they are caused to move outwards radially and so to take
firm hold within the tube. The sides of the sliding pieces are made dovetailed and
move in dovetailed recesses formed in the boss of the mandril so that when the
central screw is turned in the opposite direction, the pieces are drawn radially
inwards and are thus caused to release their grip on the tube. Instead of
employing dovetailed pieces and recesses the pieces may be made of the section of
an inverted T the two projecting ribs of each moving along corresponding chases
in the recesses of the mandril boss. Or the pieces and recesses may be made with
parallel sides, and each piece may have cut along its side an inclined chase in
which engages the point of a set screw fixed in the mandril boss. Fig. 1 of the
arcompanying drawings is the side view of a Tube Beader of the kind last described,
Fig. 2 is a longitudinal section, Fig. 3 a transverse section on XX and Fig. 4 a
transverse section on Y Y. The three serrated pieces E which take a grip on the
interior of the boiler tube B are fitted to slide along inclined beds formed in the
body of the mandril and are notched to engage the head H of the screw pin c.
Each of the gripping pieces E is also made with an inclined groove e parallel to the
bed along which it slides and the points of pins p screwed obliquely into the
mandril enter these grooves.
As the screw C is turned in the one direction or
the other by a wrench applied to its head c the pieces E are caused to slide along
their inclined beds. As they are moved towards the left they advance radially
outwards and press against the interior of the tube B so as to hold the tool firmly
against the beading strain; as they move towards the right they are retracted
inwards releasing the grip on the tube and leaving the tool free to be removed.
g are the beading rollers which are strained against the end of the tube B by
screwing up the nut N, and in order to lessen friction rollers R and washers are
interposed between the nut N and the boss F which carries the beading rollers.
The tool is worked by a ratchet brace movement in the usual way. Obviously,
instead of making the pieces E of rectangular section grooved to receive the pins p,
they might be made of T section or of dovetail section, the inclined beds of the
mandril in which they slide being of corresponding form.
Having thus described the nature of our invention and in what manner the same
is to be performed we would have it understood that we make no general claim to
tools for upsetting and beading the ends of boiler tubes by means of rollers pressed

page_text: against the tubes and caused to roll round them by a ratchet motion, but we claim
in respect of Tube Beaders so operating:
The arrangement of the internally gripping pieces E fitted to slide along
inclined beds on the mandril A in combination with the screw C having a head H
engaging in notches of the pieces E substantially as and for the purposes herein set
forth.
In witness whereof I the said John Albert Frieake have hereunto set my
hand and seal this Twenty Sixth day of September in the year of our
Lord One Thousand eight hundred and eighty two.