Improvements in Hinges for Oven Doors and certain other Doors.
Year: 1896

page_text: Date of Application, 18th Mar., 1896
Complete Specification Loft 10th Doc. 1806 Accented
30th lon 4907
PROVISIONAL SPECIFICATION.
Improvements in Hinges for Oven Doors and certain other Doors.
I, ARTHUR CHATWIN, of Market Foundry, Tipton, Staffordshire, General and
Builder's Ironfounder, do hereby declare the nature of this invention to be as
follows:-
This invention consists of the herein described improvements in hinges for the oven
doors of cottage grates and of other kitchen grates and ranges and hinges of other
cast metal doors which are hinged to a metal frame such as boiler furnace doors.
and the like. By my invention I simplify the construction of the hinge and thus
reduce the cost of manufacture.
I will describe my invention as applied to an oven door.
In carrying out my invention I cast two of the knuckles or lugs of the hinge in
a piece with the oven or oven side at a proper distance apart one above the other to
allow of the other knuckle of the door fitting between them. These two knuckles
are cast in a piece with the hinge pin which is laid in the mould before the oven or
oven door is cast and extends from one knuckle to the other across the space between
the two knuckles; or instead of employing a continuous hinge pin I may make the
hinge pin in two pieces one of which is cast to the top knuckle and the other to the
bottom knuckle so as the better to allow for the contraction of the oven or oven side
when cooling.
The binge knuckle or lug on the door is made in two pieces as if the knuckle were
divided in a plane parallel with the hinge pin one of these pieces being cast in a
piece with the door and the other piece is made as a separate plate adapted to bolt to
the inside or outside of the door. The half of the knuckle which is cast with the
door has a longitudinal groove in which the hinge pin or divided pin will fit and the
separate half of the knuckle has also a longitudinal groove corresponding with
the hinge pin. To hinge the oven door to the oven side or oven formed as above
described the oven door has to be placed in position with its half knuckle between
the two knuckles on the oven side and with the hinge pin between the half knuckle
and the separate plate. The latter is then by screws or holts fixed to the oven
door so as to embrace the hinge pin in the groove between the plate and the half
knuckle thus securely hinging the door to the oven side or oven but permitting
of the door being readily removed when required by first removing the loose plate
from the door.
It will be evident that instead of the hinge pin being cast with the oven or oven
side and the lug or knuckle on the door being made in halves this arrangement
may be reversed that is to say, the hinge pin and its lugs may be cast with the
door and divided knuckle be formed with the oven or oven side and the separate
plate be fixed thereto.
When the oven is large enough to require it I may similarly provide two or more
divided knuckles and plates on the door (or on the oven side) in which case there
will be corresponding knuckles and hinge pins cast with the oven side (or with the
door).
My invention is similarly applied to furnace doors and other like doors and their
frames.
Dated this 16th day of March 1896
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.

page_text: Improvements in Hinges for Oven Doors and certain other Doors..
I, ARTHUR CHATWIN, of Market Foundry, Tipton, Staffordshire, General and
Builder's Ironfounder, 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:-
This invention consists of the herein-described improvements in hinges for the
oven doors of cottage grates and of other kitchen grates and ranges and hinges of
other cast metal doors which are hinged to a metal frame such as boiler furnace doors
and those doors which are known as flaps or wing pieces and swinging canopies of
fire grates and the like. By my invention I simplify the construction of the hinge
and thus reduce the cost of manufacture.
I will describe my invention as applied to an oven door and refer to the accom-
panying drawings on which Fig. 1 is a front elevation of an oven door and oven
side with the hinge constructed in accordance with this invention; Fig. 2 is a
sectional plan of the same; Fig. 3 is a front elevation and Fig. 4 is a plan of the
oven door separate from the oven side which latter is shewn separately in elevation
by Fig. 5; Fig. 6 shews parts of the hinge of the said door separately; Fig. 7 is
a sectional plan and Fig. 8 is a front elevation of an oven door illustrating a
modification of my invention; Fig. 9 is a sectional plan of an oven door illus
trating a further modification; Fig. 10 shews the parts of the hinge and door
represented by Fig. 9 separately; Fig. 11 is a front elevation of a larger oven
door and oven side with my invention applied and Fig. 12 is a front elevation of
the oven side part separately.
The same letters of reference indicate the same or corresponding parts in all the
figures of the drawings..
Referring firstly more particularly to Figs. 1, 2, 3, 4, 5, 6, 7 and 8, in carrying
out my invention I cast each of the two knuckles a' a2 in a piece with the oven or
oven side A at proper distances apart one above the other to allow of the other
knuckle on the oven door fitting between them. These two knuckles a¹ a are
cast in a piece with the hinge pin which is laid in the mould before the oven or
oven door is cast and extends from one knuckle to the other across the space between
the two knuckles; or instead of employing a continuous hinge pin I prefer to make
the binge pin in two pieces as shewn marked c 2 one of which namely c is cast
to the top knuckle a' and the other namely 2 is cast to the bottom knuckle a so as
the better to allow for the contraction of the oven or oven side A when cooling.
The hinge knuckle or lug on the door is made in two pieces marked respectively
and D as if the knuckle were divided in a plane parallel with the hinge pin one of
the pieces namely b' being cast in a piece with the door B and the other piece is
made as a separate plate D shewn separately by Fig 6 adapted to bolt to the inside
(or as shewn by Figs. 7 and 8 to the outside) of the door B. The half of the
knuckle which is cast with the door B has a longitudinal groove in which the
hinge pin or divided pin c¹ will fit and the separate half D of the knuckle has a
longitudinal grooved corresponding with the hinge pin or divided hinge pin.
To hinge the oven door B to the oven side A or ovon formed as above described
the oven door B has to be placed in position with its half knuckle between the
two knuckles a' a² on the oven side A and with the hinge pin or divided hinge
pin between the half knuckle b1 and the separate plate D as shewn in Figs. 1, 2
and 8. The plate D is now by screws or bolts e' e fixed to the oven door B so as
to embrace the hinge pin or divided hinge pin c'e in the groove between the plate D
and the half knuckle 6 thus securely hinging the door B to the oven side A or
oven but permitting of the door being readily removed when required by first
removing the screws or bolts el e and loose plate D from the door B.

page_text: In the modification of my invention shown by Figs. 9 and 10 the half knuckle
is not cast with the door B but is made separate therefrom in the form of a plate Di
which is a counterpart of the plate D above described. Thus the oven door B is-
gripped between the two plates D and D' secured thereto by the bolts el e as afore-
said, these plates D D' embracing the door and the binged or divided hinge pin c¹ c*
between them and thus forming the hinge.
It will be evident that instead of the hinge pin or divided hinge pin c¹³being
cast with the oven or oven side A and the lug or knuckle D on the door being
made in halves as in the arrangement above described, this arrangement may be
reversed, that is to say, the hinge pin or divided hinge pin c¹² and its lugs a¹ a²
may be cast with the door B and the divided knuckle b¹ be formed with the oven or
oven side A and the separate plate D be fixed thereto.
When the oven is large enough to require it, I may similarly provide two or more
divided knuckles and plates on the door (or on the oven side) in which case there-
will be corresponding knuckles and hinge pins cast with the oven side (or with the
door). For instance as shewn by Figs. 11 and 12 where the oven door B has two
of the half knuckles b' cast with it and two of the plates D as indicated by dotted
lines bolted to the inside of the same and the oven side A has in addition to the top.
lug a¹ and the bottom lug a with their divided hinge pins cc, an additional central
knuckle a' cast with another hinge pin c projecting beyond the ends of the same.
My invention is similarly applied to furnace doors and other like doors and their
frames such as the flaps and wing pieces of fire grates and the swinging canopies of
fire grates.
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. Making a cast iron oven door or other door of a fire grate or kitchen range or
of a boiler furnace with its hinge knuckle or each of its hinge knuckles divided
longitudinal into two parts at about the centre of the hinge pin or divided hinge pin,
one of the said parts of the knuckle or knuckles being cast with the door and the-
other part of the knuckle being bolted to otherwise fixed thereto the said parts of the
hinge knuckle being formed so as to grip between them the hinge pin or divided
hinge pin which is cast with the knuckle or knuckles on the oven side or fire-grate
range or door frame, substantially as set forth.
2. Making a cast iron oven door or other door of a fire grate or kitchen range.
or of a boiler furnace with its hinge knuckle or each of its hinge knuckles divided
longitudinally into two parts at about the centre of the hinge pin or divided hinge.
pin the said knuckle or knuckles being bolted or otherwise fixed to the door and
formed so as to grip between them the door and the hinge pin or divided hinge pin
which is cast with the knuckle or knuckles on the oven side or fire grate range or
door frame substantially as set forth.
3. Making an oven side or other part of a.fire grate or kitchen range or the frame
of a furnace door to which a door has to be hinged, with the hinge knuckle or each
of the hinge knuckles divided longitudinally into two parts at about the centre of
the hinge pin or divided hinge pin one of the said parts of the knuckle or knuckles
being cast with the oven side or fire grate or kitchen range or door frame and the
other part of the knuckle or knuckles being bolted or otherwise fixed thereto, the
said parts of the hinge knuckle being formed so as to grip between them the hinge
pin or divided hinge pin which is or are cast with the knuckle or knuckles on the
door substantially as set forth.
Dated this 17th day of December 1896
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.