AN IMPROVED METHOD OF AND APPLIANCE FOR SEALING THE BOLT HOLES OF "FUEL ECONOMISER" CAPS OR COVERS
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I EDWARD GREEN of Heath Old Hall Wakefield in the County of York, Fuel
Economiser Manufacturer do hereby declare the nature of my said Invention for
AN IMPROVED METHOD OF AND APPLIANCE FOR SEALING THE BOLT HOLES OF
"FUEL ECONOMISER" CAPS OR COVERS, to be as follows:-
:
The object of this Invention is a special method and appliance for sealing the
bolt holes of fuel economiser caps or covers.
For the purpose of my Invention I make a washer or collet of any soft metal.
or metal compound not liable to melt or become destroyed under ordinary heat
and I arrange the same within a hole of the cap or cover which the washer or
collet fits loosely.
The interior surface of the washer or collet is of equal diameter but the exterior
is of cone or an equivalent shape to fit or about fit an inclined or tapered bole in
the cap or cover. The fixing bolt passes through the washer or collet, the thread
of the bolt being of sufficient depth or length as to be within the washer or collet
so that when the nut of the bolt is screwed home the soft metal washer or collet
is squeezed into close contact with and slightly into the screw thread of the bolt
as to perfectly seal the passage.
The washer or collet may extend beyond the top of the cap or cover for a flat
washer to bear upon, the screwing home of the nut upon the flat washer squeezing
the top edge of the collet as. to form a flange to rest on the cover and a squeezed
in rib or fillet against the thread of the screw.
I have referred to one washer or collet only to a bolt but more than one may
be arranged or fitted or the washer or collet may be composed of more than one
piece.
The essential feature of novelty in this Invention is,—the expansion by pressure
of a soft metal collet to fill the space between the bolt and the cover hole and
thereby completely sealing the same.

page_text: I EDWARD GREEN of Heath Old Hall Wakefield in the County of York, Fuel
Economiser Manufacturer, do hereby declare the nature of my. Invention for
"AN IMPROVED METHOD OF AND APPLIANCE FOR SEALING THE BOLT HOLES OF
'FUEL ECONOMISER' CAPS, OR COVERS," and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
The object of this Invention is a special method and appliance for sealing the
bolt holes of fuel economiser caps, or covers.
For the purpose of my Invention I make a washer or collet A of any soft metal
or metal compound not liable to melt or become destroyed under ordinary heat
and I arrange the same within a bolt hole of the cap or cover of a fuel economiser B
which the washer or collet fits loosely.
The interior surface of the washer or collet is of equal diameter but the exterior
is of cone or an equivalent shape to fit or about fit an inclined or tapered hole in
the cap or cover.
The fixing bolt C passes through the washer or collet the thread of the bolt
being of sufficient depth or length as to be within the washer or collet so that
when the nut of the bolt is screwed home the soft metal washer or collet is
squeezed into close contact with and slightly into the screw thread of the bolt as
to perfectly seal the passage.
The washer or collet may extend beyond the top of the cap or cover for a flat
washer to bear upon the screwing home of the nut upon the flat washer squeezing
the top edge of the collet as to form a flange to rest on the cover and a squeezed
in rib or fillet against the thread of the screw.
I havo referred to one washer or collet only to a bolt but more than one may
be arranged or fitted or the washer or collet may be composed of more than one
piece.
The essential feature of novelty in this Invention is the expansion by pressure
of a soft metal collet to fill the space between the bolt and the cover hole and
thereby completely sealing the same. The annexed Drawings clearly show my
Invention. Figures 1 and 2 represent my soft metal collet A in elevation and in
cross section respectively. Figure 3 shows the collet A in position, within a conical
shaped hole of the economiser cover. B, C is a washer placed upon the collet A
and upon which the nut D bears. The bolt head E abuts against the usual cross
bar F as seen in Figure 4 and the threaded end F¹ of the bolt G passed through
to the outside of the cover or cap B when by turning the nut D in the usual
manner a compression and a swaging of the soft metal collet A takes place, which
swaging fills it into close contact with the conical hole of the cover B and also
into the screw threads of the bolt G as at Figure and in the detached view
Figure 6, the compression by the action the washer C causing a dange I to form
between it and the cover B and a fillet J within the hole of the washer against
the nut D to effectually close up the crevices and thereby hermetically seal the
joint or opening at that part. The tightening action of the screw bolt G and
nut D forces the inclined edge of the cover into close contact with the corresponding
incline faces of the box K as will be understood by Figure 4.

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 construction and use of soft metal collets and the method of sealing bolt
holes of fuel economiser caps or covers by the swaging action of said collets by
pressure of screw nuts as described and as shown in the annexed Drawings.
T
H. GARDNER,
166, Fleet Street, London,
Agent for the Applicant.