IMPROVEMENTS IN THE MANUFACTURE OF STOVES AND FIRE-PLACES
Year: 1858

page_text: LETTERS PATENT to John Jobson, of the Derwent Foundry, Derby, for
the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF STOVES AND
FIRE-PLACES."
Sealed the 20th May 1859, and dated the 6th December 1858.
PROVISIONAL SPECIFICATION left by the said John Jobson at the
Office of the Commissioners of Patents, with his Petition, on the '6tli
December 1858.
I, JOHN JOBSON, of the Derwent Foundry, Derby, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF
STOVES AND FIRE-PLACES," to be as follows:-
The Invention is particularly applicable for connecting together the cast-
iron plates and other cast parts of stoves. I cast one plate or piece with a
boss or projection of triangular or other form, and tapering or smaller at the
top than at the base. I cast the other piece which is to be connected to it
with a hole or cavity of corresponding form to the boss, so that when placed
over the boss the two pieces are in their proper relative position, and the boss
passes nearly but not quite through the other piece. A wrought-iron screw
is placed in the mould when the boss is cast, and thus becomes fixed in the
boss, or it may be afterwards tapped into the boss. A washer is placed over
the screw when the two pieces of metal are placed together, and a nut is
screwed upon it, and the pieces are thus securely and accurately united with-
out the necessity of filing or other fitting. In connecting two plates together,

page_text: the plates may come in contact with each other, or the hole in one may be so
tightly fitted to the boss as to prevent them from coming in close contact.
The screw may be tapped in or cast in near the boss instead of in it, although
the first plan is preferable. By making the boss of triangular or other form
differing from a circle, the two pieces will be prevented from turning or
shifting their positions.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Jobson in the Great Seal Patent Office on the 30th
May 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
JOBSON, of the Derwent Foundry, Derby, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of December, in the year of our Lord One
thousand eight hundred and fifty-eight, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Jobson, Her special licence that I, the said John Jobson, my exe-
cutors, administrators, and assigns, or such others as I, the said John Jobson,
my executors, administrators, and assigns, should at any time agree with, and
no others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN THE MANU-
FACTURE OF STOVES AND FIRE-PLACES," upon the condition (amongst others) that
I, the said John Jobson, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should par-
ticularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Jobson, do hereby declare the
nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, reference being had to the accompanying Drawing, and to
the figures and letters marked thereon, that is to say:-
The Invention relates particularly to connecting together the cast-iron
plates and other cast parts of stoves and fire-places.

page_text: The ordinary mode of connecting the parts of stoves is to drill holes in the
cast-iron plates and parts, and to tap these holes and fit screws into them, and
sometimes also to cast in the screws. These screws pass through holes which
are cast or drilled in the parts which are to be attached by them, and nuts
are screwed on their ends to secure the parts together. In some cases bolts
and nuts are employed to connect the parts or pieces, the bolt passing through
both pieces, and also screws with countersunk heads are used.
In this way
the weight of the parts, and the strains to which they are exposed in moving
and carting them from place to place, are borne by the screws, and it
not unfrequently happens that they are broken or pulled out of their places.
The cost of labour in drilling and tapping the holes, and putting the parts
together, is also considerable. By the present Invention I am enabled to
connect the parts in a more secure manner and at less cost than by the
ordinary plan.
I cast one plate or piece with a boss or projection of triangular or other
form, and tapering or smaller at the top than at the base. I cast the other
piece which is to be connected to it, with a hole or cavity of corresponding
form to the boss, so that when placed over the boss the two pieces are in their
proper relative position, and the boss passes nearly but not quite through the
other piece. A wrought-iron screw is placed in the mould when the boss is
cast, and thus becomes fixed in the boss, or it may be afterwards tapped into
the boss. A washer is placed over the screw when the two pieces of metal are
placed together, and a nut is screwed upon it, and the pieces are thus securely
and accurately united without the necessity of filing or other fitting. In con-
necting two plates together, the plates may come in contact with each other,
or the hole in one may be so tightly fitted to the boss as to prevent them from
coming in close contact. The screw may be tapped in or cast in near the boss
instead of in it, although the first plan is preferable. By making the boss of
triangular or other form differing from a circle, the two pieces will be prevented
from turning or shifting their position.
Figure 1 of the accompanying Drawing is a back view of a portion of a
stove or fire-place having the parts connected together according to my Inven-
tion; Figure 2 is a horizontal section of the same. A is the front plate of the
stove; B and C are the side plates or cheeks; and D is the top plate resting
on B and C. Each of the plates B, C, and D is cast with a flange shewn at d,.
or with lugs or projections, as shewn at b and c: In the flange d are two
triangular holes, which fit upon two triangular projections or bosses cast on.
the front plate A. Figure 3 is an elevation of the full size of a portion of the
flange d, with the triangular hole e, which is made taper or larger at the side.

page_text: which is towards the front plate than at the other side. Figure 4 is an
elevation of a portion of the front plate A. with a triangular boss f, which is
made taper to fit the triangular hole e in Figure 3. The corners or angles are
bevilled a little, so that the boss may fit the hole, even if the angles of the hole
should be not quite sharp. g is a wrought-iron screw, which is placed in the
mould when the plate A is cast, and thus becomes fixed in the boss, or it may
be screwed into the boss after the plate is cast. Figure 5 is a section through
the plate A and flange d and boss f; Figure 6 is an elevation of the joint or
connection. When the hole in the flange d has been placed on the boss f, a
washer his slipped on the screw g, and a nut i is screwed upon it. The boss f
does not pass quite through the hole in the flange d, and therefore the pressure
of the nut and washer comes upon the flange d, and forces it firmly against the
plate A. The two pieces are thus firmly connected together. The weight and
the strain to which the stove is exposed in moving or carting it from one place
to another is chiefly borne by the bosses, while the screws have merely to
keep the plates on the bosses. At the same time the bosses and holes being
formed in the operation of casting the parts, the stove or fire-place is put
together with great facility and with great accuracy. In some cases, especially
when a piece is fixed by a single screw, I make the hole of such size that the
boss may fit tightly into it, as shewn in section in Figure 7, without the two
plates or pieces A and d coming into close contact. The pieces are thus
very firmly secured or wedged together when the washer h is placed on the
screw g, and the nut i is screwed up tight. When a single boss is used, it is
generally preferable to make it of trangular or other form differing from
a circle, so as to prevent one piece from turning round on the other. Thus,
Figure 8 is an elevation of a piece of a stove with a square boss f, and a
wrought-iron screw 9 fixed in it. When two or more bosses are used, the
form of the boss is of less importance, and a circular boss may be
employed, as shewn in elevation in Figure 9. Thus, in the lugs b, b, b,
in Figure 1, I have shewn a square, and a circular, and a hexagonal boss,
and any other suitable form of boss may be employed, if preferred. The
bosses and holes in the lugs b and in the two lower lugs c, and the right hand
one of those in the flange d.in Figure 1, are shown without the washers and
nuts.
The fastenings of the upper lug c and the left hand one of the flange d
are shown with their washers and nuts as in the full size elevation, Figure 6.
The other parts of the stove or fire-place are connected together in a similar
manner. I prefer to fix the screw in the boss in the manner herein-before
described, but some of the advantages of my Invention may be obtained by
placing the screw at the side of or separate from the boss.
Thus Figure 10 is

page_text: an elevation, and Figure 11 is a section of such an arrangement. A is one of
the pieces, and d the other; the piece A has one or more bosses f cast upon it;
and the wrought-iron screw 9 is screwed into it, or fixed in it by being placed
in the mould when the piece A is cast. The piece d is cast with a hole or
holes to fit the boss or bosses f, and with another hole which passes freely over
the screw g without fitting or touching it; i is a nut which may be used with
or without a washer. By screwing up this nut, the two pieces A and d are
connected together. It will be seen that the portion of the screw which is
fixed in the cast-iron plate A in this arrangement is much shorter than that
in the arrangements first herein-before described, in which the screw is fixed
in the boss; the screw may be fixed in either piece. Thus in the section
Figure 12, I have shown it fixed in the piece d, and passing freely through a
hole in the piece A. The bosses may fit into holes passing through the plate
or piece as herein-before described, or they may fit into cavities cast in the
plate or piece, but not passing through it, as shown in Figure 12. The screw
may be fixed in the plate d, and may pass through the boss or projection f, on
the plate or piece A, as shown in section in Figure 13; or the screw may be
fixed in the boss, and may pass freely through a hole in the bottom of the
cavity, as shown in section in Figure 14; no washer is then required. A
detached bolt and nut may be substituted for the screw and nut, as shown in
section in Figure 15, where k is the bolt passing through the piece A and
boss f, and secured by the washer h and nut i; or, a screw with a head may be
substituted for the screw and nut, as shown in section in Figure 16, where is
the screw screwed into the boss f on the piece A; or the nut and screw are
placed in the mould when the piece A and boss f are being cast, and the nut
thus becomes fixed in the boss f. The screw is then unscrewed out of the nut
and screwed in again when the parts are put together.
It is not necessary that the bosses or projections should be of the exact form
of the corresponding holes; thus a round boss may be used with a triangular
hole or a square hole, or vice versa. The bosses or projections, and the holes
into which they fit, are in all cases formed by the process of casting. The
patterns or models are carefully adjusted or fitted in the first instance, and the
moulds are made from them by any of the usual modes of moulding. The
holes may be advantageously formed by means of "chills or metal cores
inserted in the mould. The bosses or projections may also be formed by means
of chills or by the ordinary sand moulds or dry sand cores.
The screws
(except in the arrangements shewn in Figures 15 and 16) are placed in the
mould, and thus become fixed in the casting, or they may be screwed in
afterwards, if desired. I am thus enabled to connect together the cast parts of

page_text: stoves and fire-places with great accuracy and facility, and at the same time
with greater security than by the ordinary means.
Having now described the nature of the said Invention, and in what manner
the same is to be performed, I wish it to be understood that what I claim
is, connecting together the cast parts of stoves and fire-places by casting one
part with a projection or projections, and the other part with a corresponding
hole or holes, and uniting them by a screw or screws either fixed in one of
the parts by the operation of casting, or otherwise applied with or without a
washer and nut, and in such manner that the screw is relieved or protected
from the lateral or transverse strain which is borne by the castings, as herein-
before described.
In witness whereof, J, the said John Jobson, have hereunto set my
hand and seal, this Twenty-seventh day of May, in the year of our
Lord One thousand eight hundred and fifty-nine.
Witness,
CHARLES COWPER,
20, Southampton Buildings,
Chancery Lane.
JOHN JOBSON. (L.S.)