Improvements in Cooking Ovens.
Year: 1893

page_text: Date of Application, 20th Apr., 1893
Complete Specification Left, 2nd Nov., 1893-Accepted, 2nd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Cooking Ovens.
We, FREDERICK WILLIAM DYE and JOHN WELLS both of 176, Regent
Street, London, W. Engineers do hereby declare the nature of this. invention
to be as follows:-
This invention relates to improvements in cooking ovens and has for object to
provide a means of observing the progress of the process of cooking of the joint
or other article without as is now necessary continually opening the oven door, a
proceeding which whilst inconvenient and troublesome prevents the really proper
cooking of the joint or other article by reason of the changes in the temperature of
the oven caused thereby.
In accordance with this invention we form the oven door with glass panes therein
that the interior of the oven may easily and readily be seen. To prevent con-
densation we prefer to form the glass portion of the door double that is to say we
have two panes of glass so placed that there is an air space between them and
where the glass and metal would otherwise touch we have a packing of asbestos,
cloth or other suitable material.
Dated this 20th day of April 1893.
HUGHES, ELI & HUGHES,
76, Chancery Lane, W.C., Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Cooking Ovens.
We FREDERICK WILLIAM DYE and JOHN WELLS both of 176, Regent
Street, London, W., Engineers 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 relates to improvements in cooking ovens and has for its object to
provide a means of observing the progress of the process of cooking of the joint
or other article without, as is now necessary, continually opening the oven door,
a proceeding which whilst inconvenient and troublesome prevents the really proper
cooking of the joint or other article, by reason of the changes in the temperature
of the oven caused thereby.
In accordance with this invention we provide in the oven-door two or more glass
panes as more particularly hereinafter described in order that the interior of the
oven may easily and readily be seen. To prevent condensation of the vapors upon
the glass panes aforesaid we arrange the same in two or more rows; that is to say,
we have two or more or a series of glass panes so placed that there is an air space
between them and where the glass and metal would otherwise touch we have a
packing of asbestos cloth or other suitable material.
And in order that this our invention may be fully understood and readily carried
into effect we will now describe same with reference to the accompanying sheet of
drawings in which
Figure 1 represents in front elevation an oven door constructed in accordance
with this our invention, and in which the greater portion of the area of the door is
represented as being glazed. Figure 2 is a cross-sectional elevation of the same,
through line A, B, Figure 1.
Figure 3 shews in front elevation an oven door glazed in accordance with our
invention and having two panes of glass in front. It will readily be understood

page_text: that any convenient or desired number of panes of glass may be employed all as
required. In Figure 2 it will be observed that the door as shewn in cross section
is suitably formed for the reception of the glass panes; but where it is desired to
adapt this invention to at present existing oven, doors, the required aperture or
apertures is or are made in such door, and the glass carrier may be screwed,
rivetted, or otherwise attached, to the door.
Figure 4 shews in end sectional elevation a suitable form of carrier for the
purpose, but any desired or suitable arrangement may be employed..
Similar letters of reference indicate like parts throughout the several figures.
a is the oven door proper and 6 is the glazed portion thereof. The panes of
glass as will be particularly seen on reference to Figure 2 are arranged double so
as to leave an air space between them for the purpose of preventing condensation
upon the glass and thereby preventing or obstructing observation.
Though shewn double in this figure it will readily be understood that the panes
of glass may be arranged in three rows or even more if deemed necessary or
advisable.
To prevent any liability of fracture of the glass through inequality of expansions
of the glass and iron we embed the panes b in a packing c of asbestos or other
suitable material. By this means we also obtain a practically air tight joint and
no loss of heat is engendered in the interior of the oven.
In Figures 1 and 2 this invention is shewn as applied to an oven door specially
constructed to adapt itself to the reception of the glass panes. When the packing c
is inserted in the channel formed in the door a and the panes of glass 6 properly
placed in position; the rear securing frame d is screwed or otherwise attached to
the door a and all is firmly held.in position.
To existing oven doors a suitable arrangement for the application of our invention
is shewn in Figures 3 and 4. In accordance therewith an aperture or apertures
are made in the door a and the panes of glass are carried in a frame e which is
placed around the aperture and screwed or otherwise attached to the oven door.
We are aware that prior attempts have been made to glaze oven doors for the
purpose of allowing the interior of the oven to be seen; but such attempts have
hitherto been confined to the application of a single glass which does not well
admit of the purpose intended, as it is liable to fracture and allows of vapour being
condensated upon it. These disadvantages in accordance with this our invention
are entirely obviated.
We desire it to be understood that we make no claim in respect to glazing the
oven door with a single sheet of glass without the provision of the air chamber
hereinbefore described, but-
Having now particularly described and ascertained the nature of our, said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The construction, arrangement, and combination of parts forming our improve-
ments in cooking ovens substantially as and for the purposes herein before described
and shewn in the accompanying drawings.
2. In a cooking oven the application and arrangement to the door of the panes
of glass 6 with air space between, substantially as and for the purposes herein before
described and shewn.
3. In cooking ovens the combination with the doors thereof of glass panes b,
arranged with air space between; asbestos or other packing c; and attachment
devices d and e or their equivalents; all substantially as and for the purposes
herein before described and shewn.
Dated this 2nd day of November 1893
HUGHES, ELI & HUGHES,
76, Chancery Lane, W.C., Agents for the Applicants.