for Boilers and other Purposes.
Year: 1885

page_text: for Boilers and other Purposes.
I STANHOPE PERKINS of 6 Healey Terrace Fairfield Manchester in the County
of Lancaster Engineer do hereby declare the nature of my invention for
IMPROVEMENTS IN THE MEANS OF FIXING METAL TUBES INTO PLATES FOR BOILERS
AND OTHER PURPOSES" to be as follows :—
This invention relates to a method of fixing the ends of steel or other tubes into
tube plates as employed in locomotive engine boilers multitubular marine engine
boilers and for other purposes where it is required to fix the open end of a tube
into a hole in a boiler or other metal plate.
I first drill or bore out the hole in the plate in the usual manner, and then, by
means of an expanding or other convenient tool, I form inside the said hole an
anular recess (about midway through the plate) of a larger diameter.
I then pass the end of the tube through the plate and by means of a suitable
expanding tool I bulge out the tube so as to fill the annular recess in the hole, and
thus hold the tube tightly, therein and prevent any longitudinal movement by
expansion or otherwise.
I then expand the mouth of the tube in the usual manner and drive in an
ordinary ferrule into the same and the fixing is complete.
A convenient way of bulging out the tube so as to fill the annular recess in the
hole is to form a die in three sections with a circumferential projection or collar,
and after placing it in the mouth of the tube expanding the sections by means of
a taper drift.

page_text: Improvements in the Means of Fixing Metal Tubes into Plates
for Boilers and other Purposes.
I STANHOPE PERKINS of 6 Healey Terrace, Fairfield Manchester in the County
of Lancaster Engineer do hereby declare the nature of my invention for
IMPROVEMENTS IN THE MEANS OF FIXING METAL TUBES INTO PLATES FOR BOILERS
AND OTHER PURPOSES 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 the method of fixing the ends of steel or other tubes into
tube plates as employed in locomotive engine boilers, multitubular marine engine
boilers and for other purposes where it may be required to fix the open end of a
tube into a hole in a boiler or other metal plate.
s
The nature of my invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference
to the sheet of drawings, hereunto annexed and the following explanation thereof.
Fig. 1. shows a full sized section of a plate with a hole bored and prepared
according to my invention for the reception of the end of the tube. Fig. 2. shows
the same with the end of the tube placed therein but not expanded. Fig. 3 is
a section showing the tube expanded and fixed; and Fig. 4 shows the same with
an internal ferrule driven therein.
I first drill or bore out the hole a, a in the plate b, 6 in the usual manner and
then by means of an expanding or other convenient tool, I form inside the said hole
an annular recess c, c about midway through the plate b, b and of a larger diameter
than the hole a, a as shown at Fig. 1.
:
I then pass the end of the tube d, d through the hole a, a in the plate b, b and
by means of a suitable expanding tool, I bulge out or expand the tube d, d so as
to fill the annular recess c, c in the hole a, a as shown at Fig. 3. and thus hold the
end of the tube d, d tightly therein and prevent any longitudinal movement by
expansion or otherwise.
I then expand the mouth of the tube in the usual manner and (if preferred)
drive an ordinary ferrule e, e into the same as shown at Fig. 4. and the fixing is
complete.
A convenient way of bulging out the tube d, d so as to fill the annular recess c, c
in the hole is to form a die in these sections with a circumferential projection or
collar on the outside corresponding with the annular recess c, c and after placing
it in the mouth of the tube b, b expanding the sections by means of a taper drift.
The three sections of the die may be held together by means of an annular coiled
spring or otherwise,

page_text: 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:-
The improved means of fixing metal tubes into plates for boilers and other
purposes by first cutting or forming an annular recess about midway in the hole
in the plate placing the end of the tube therein and then by means of a suitable
expanding tool bulging out or expanding the tube so as to fill the said annular
recess and thus fix the tube in the plate substantially as herein before described and
illustrated by the drawings annexed.