Improvements in the Manufacture of Boller Ferrules and like Articles.
Year: 1895

page_text: Date of Application, 24th. Jan., 1895
Complete Specification Left, 23rd Oct., 1895-Accepted, 23rd Nov.,
1895
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Boller Ferrules and like
Articles.
I, GEORGE HOOKHAM, of Nos. 7 and 8 New Bartholomew Street, in the City
of Birmingham, Manufacturer, do hereby declare the nature of this invention to be
as follows:-
My invention relates to the ferrules inserted in the ends of the tubes of tubular
boilers and its object is to produce such ferrules in an effective and economical
manner. My invention consists in a method of producing the ferrules so as to
round the ends and suitably taper them by a punching or drawing process thereby
avoiding the use of lathe turning.
In carrying my invention into effect I prepare the ferrules by cutting off suitable
lengths of tube. These short pieces I insert in a tapered die so shaped as to taper
down to a shoulder, the shoulder being rounded off to the configuration desired for
the ferrule end. The shoulder is backed up by a suitable depth of metal to give
sufficient resisting power. I place the ferrule into this taper die and taper it out
by means of a tapered punch which carries a parallel part to enter the lower part
of the die past the rounded shoulder. The punch is also arranged with a collar or
shoulder above the taper part. The tube is expanded by the taper to fit the die
and then the shoulder comes in contact with its upper edge forcing the lower edge
against the rounded shoulder and thus forming the rounded end. In order to
ensure that the ferrule shall adhere to the punch or tapering tool I roughen the
surface of the said, tool to a sufficient extent to enable the ferrule to be lifted out of
the die upon the up stroke. I remove the ferrule on the up stroke by any suitable
detaching device.
By this process I produce ferrules having the proper taper and rounded advance
edge. If required I turn the upper edge to the correct length.
Instead of obtaining the rounded edge in this manner I may draw the ferrule
from a disc by cupping and on cutting out the bottom of the cup I obtain the
rounded edge.
.
In manufacturing the thicker ferrules, I may begin the process by hot squirting
or pressing in dies, a hollow cup or cylinder from a thick disc. The cup or cylinder
so produced may be drawn and further elongated by any known process.
Dated this 23rd day of Januare 1005
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Boiler Ferrules and like
Articles.
I, GEORGE HOOкнAм, of Nos. 7 and 8, New Bartholomew Street, in the City
of Birmingham, Manufacturer, 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 :-
My invention relates to the ferrules inserted in the ends of the tubes of tubular
ID027

page_text: boilers, and its object is to produce such ferrules in an effective and economical
manner. My invention consists in a method of producing the ferrules so as to
round the ends and suitably taper them by a punching or drawing process, thereby
avoiding the use of lathe' turning.
Referring to the accompanying sheet of drawings:
:-
Figure 1 is a straight piece of tube cut off ready to be tapered and rounded.
Figure 2 is a section of a die showing the punch in position within the tube
Figure 1, ready to effect the tapering and rounding.
Figure 3 shows; the position of punch and die when tapering and rounding has
been effected, and
Figure 4 is the tapered and rounded ferrule in section.
Figure 5 shows a cup drawn with rounded edges, and'
Figure 6 shows the round end tube produced by punching out the centre of
the cup.
In carrying my invention into effect, I prepare the ferrules by cutting off suitable
lengths of tube, as A, Figure 1. These short pieces I insert in a tapered die, B so
shaped as to taper down at C to a shoulder C¹, the shoulder C¹ being rounded off
to the configuration desired for the ferrule end. The shoulder is backed up by a
suitable depth of metal to give sufficient resisting power. I place the ferrule A
into this taper die, and taper it out by means of a tapered punch D, which carries a
parallel part D to enter the lower part of the die past the rounded shoulder C¹.
The punch is also arranged with a collar or shoulder. above the' taper part D'.
The tube is expanded by the taper. D', to fit the die, and then the shoulder comes
in contact with its upper, edge forcing the lower edge against the rounded
shoulder C, and thus forming the rounded end A2. In order to ensure that the
ferrule shall adhere to the punch or tapering tool I roughen the surface of the said
tool to a sufficient extent to enable the ferrule to. be lifted out of the die upon
the up stroke. I remove the ferrule on the up stroke by any suitable detaching
device.
By this process I produce ferrules as A¹ Figure 4, having the proper taper
and rounded advance edge A². If required I turn the upper edge to the correct
length.
Figure 2 shows the short tube A inserted in the die and the punch in position to
taper. Figure 3 shows the tapering completed, and the advance edge of the
ferrule rounded off.
lustead of obtaining the rounded edge in this manner I may draw the ferrule
from a disc by cupping, as at Figure 5, and on cutting out the bottom of the cup,
as at Figure 6, I obtain the rounded edge. The round edge tube, Figure 6, may
then, be tapered as shown at Figures 2 and 3:
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. Manufacturing boiler ferrules and like articles by tapering and rounding as
herein before described, with reference to Figures 1, 2, 3 and 4 of the drawings.
2. Manufacturing boiler ferrules and like articles by first forming a cup, cutting
out the bottom of the cup to leave a round edge, and then tapering, substantially as
described with reference to Figures 5 and 6 of the drawing.
Dated this 22nd day of October 1895
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13 Temple Street, Birmingham, Agents for the Applicant,