AN IMPROVEMENT IN FLANGED PROTECTING FERRULES FOR BOILER TUBES
Year: 1885

page_text: I, ISRAEL MORRIS of Bloxwich Walsall County of Stafford Agricultural
Engineer do hereby declare the nature of my invention for AN IMPROVEMENT
IN FLANGED PROTECTING FERRULES FOR BOILER TUBES to be as follows:-
This Invention is intended to be used in boilers called multitubular boilers, or
boilers in which a number of small tubes are used, in order to generate steam.
In fixing the tubes in the tubeplate of such boilers, it is sometimes the practice
to insert or drive a flanged ferrule into the end of the tube next the furnace or
fireplace.
.
The object in view in the use of flanged ferrules is to cover and protect the ends
of the tubes, from injureious action of the fire, and to prevent to some extent, the
expansion of the tube ends under severe heat, and to prevent sudden contraction
when cold air is admitted through the fire door or otherwise.
The general construction of my improved flanged ferrule is like other or ordinary
flanged ferrules, and my improvement is qualified by, or consists of or in the use
and provision of a slot or opening in the side of the ferrule, i.e. both in the flange
and ring of such ferrule-This slot or opening may be about half an inch in width
or less or more.
It is intended to fasten and secure my ferrule by driving a cotter or taper key or
wedge into the slot, so that the slot forms a key way.
The provision of the slot in my ferrule will give it a degree of elasticity not
possesed by flanged ferrules having a continueous or solid circle-so that when
being inserted or driven into the tube end, it will not be so rigidly fast or so liable
to loosen the tubes by hard drifting.
I shall, preferably, cut or nich the flange in one or more places, so as to allow
the ring or pipe portion of the ferrule when inserted in the tube end, to open
outwards, under pressure from the key or wedge, and thus to fit tightly inside the
tube.
The ring of my ferrule will be tapered on the inside-to enlarge inward to a
thin edge and thus avoid being an obstruction to the opperation of sweeping or
cleaning the tubes.

page_text: When it is desired to draw the ferrules out of the tubes for any purpose, it will
only be necessary to displace the key or wedge, the ferrule will then be released.
The ring of my ferrule shall be thickened at that part of it next the slot or
opening, so as the better to contain and hold fast the key or wedge.
I hereby claim as my invention, or improvement
Firstly, The provision and use of a slot, or opening for a key way.
2ndly The fastening of the ferrule by useing taper or other key or wedge, inserted
in the opening.
3rdly The cuting or niching the flange to allow of its springing.
4thly The thickening of the ferrule ring at the part next the key way.
DONUT PRO
I, ISRAEL MORRIS, of Bloxwich in the County of Stafford, Agricultural Engineer
do hereby declare the nature of my invention for "AN IMPROVEMENT IN FLANGED
PROTECTING FERRULES FOR BOILER TUBES" and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
This invention is intended to be used in multitubular boilers, in which it is
sometimes customary when fixing the tubes in the tube-plate, to drive a flanged
ferrule into the end of the tube nearest the fire-place, in order to cover and protect
the tube ends from injury by the action of the fire, as also to reduce their expansion
under excessive heat, and contraction on the admission of air through the fire door
or otherwise.
The construction of these ferrules varies in several important points from those
in ordinary use, inasmuch as I employ a taper slot or opening therein for the
reception of a wedge-shaped key which is driven into the ferrule after it has been
inserted in the tube, thereby expanding it, and causing it to be firmly fixed
therein.
In the outer edge of the flange of the ferrule I also cut slots as far as the thickest
part of the ring, which is strengthened where the taper slot passes through.
These slots facilitate the expansion of the ring so as to fit evenly in the tube when
the key is driven in tight.

page_text: W. H. ST. AUBIN,
Patent Agent,
Bloxwich.