Year: 1887

page_text: Date of Application, 25th Feb., 1887
Complete Left, 23rd Nov., 1887
Complete Accepted, 23rd Dec., 1887
I, DAVID COWAN, of Mount Gerald, Larbert, in the County of Stirling, North
Britain, Civil Engineer, Manager for Carron Company incorporated by Royal
Charter, do hereby declare the nature of this Invention to be as follows, that is to
say:
My said Invention comprises an improved construction by means of which a
cooking range may be easily converted from a close-fire to an open-fire range and
vice versa, also an arrangement of lifting grate bottom combined with a dumping
device admitting of the grate being emptied of ashes, and also an improved ventilating
device.
In carrying out my Invention I fit a movable hood with vertical sides and flat or
otherwise-shaped top over the back part of the plate covering the fire, and. this
plate is made with a vertical piece which when the plate is in its forward_position
closes the front of the hood and makes the range a close-fire range.
The fire-
covering plate can be moved back in guides within which it fits, and then the vertical
piece at its inner end getting further back than the back of the bood, leaves an
open passage from the top of the fire into the flue at the back, thus making the
range an open-fire one. At the same time the hood may be drawn further forward
if found desirable.
The grate bottom is pivoted at its two front corners to a frame fitted so as to be
capable of sliding vertically in guides formed in the fire cheek plates. The grate
bottom is held up by a curved part on a bar movable horizontally and which when
drawn forwards allows the grate bottom to turn downwards closing it up again
when pushed inwards. For lifting the grate bottom two vertical bars are arranged
in vertical guides in the side cheeks and can be raised by cam pieces on a counter-
weighted rocking shaft which can be turned by means of a rod made with notches
for retaining it in any desired position. When the vertical bars are moved upwards

page_text: their upper ends are by inclines on the grate-bottom frame made to move inwards so
as to bear up not only the frame but also the grate bottom itself.
The improved ventilating device which is fitted to the covering plate at the top of
the coving plates, consists of openings with an outer slide with which they can be
closed more or less and with inclined covers on their upper or inner sides which
covers prevent soot or dust from falling through the openings.
Dated this Twenty-fourth day of February 1887.

page_text: Improvements in Cooking Ranges.
I, DAVID COWAN, of Mount Gerald, Larbert, in the County of Stirling, North
Britain, Civil Engineer, Manager for Carron Company, incorporated by Royal
Charter, 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, that is to say :-
My said Invention comprises an improved construction by means of which a
cooking range may be easily converted from a close-fire to an open-fire range and
vice versu; also an arrangement of lifting grate bottom combined with a dumping
device admitting of the grate being emptied of ashes, and also an improved ventilating
device.
And in order that my said Invention and the manner of performing the same may
be properly understood I hereunto append a sheet of explanatory drawings to be
hereinafter referred to and showing my improvements.
Figures, 1, and 2, on the accompanying sheet of drawings are plans partly in
section. Figure, 3, is a horizontal section as at a level a little above the grate bottom.
Figurés, 4, and 5, are vertical sections. Figure, 6, is a vertical section as at right
angles to figures, 4, and 5, but showing only the top of the range as with an open
fire; and figure, 7, is a vertical section showing the range as with a close fire.
Figure, 8, is a horizontal section as at a level below the grate; and figures, 9, and 10,
are vertical sections as at right angles to each other showing the ventilating device.
In carrying out my Invention I fit a movable hood, 10, made with vertical sides
and flat (or otherwise shaped) top over the back part of the plate, 11, covering the
fire; and this plate, 11, is made with a vertical piece, 13, which when the plate, II, is
in its forward position as shown in figures, 2, 4, and 7, of the drawings closes the
front of the hood, 10, and makes the range a close-fire range. The fire-covering
plate, 11, can he moved back in guides formed in the hob or hot plates, 14, within
which it fits, and then the vertical piece, 13, at its inner end getting further back
than the back of the hood, 10, leaves an open passage from the top of the fire into the
flue, 15, at the back, thus making the range an open-fire one, as shown in figure, 6.
At the same time the hood, 10, may be drawn further forward into the position shown
by dotted lines in figure, 6, if found desirable in case of a sluggish draught for
example. The forward movement of the hood, 10, is limited by a projection, 16, on
its top encountering the inner side of the front coving plate, 17. By reversing the
above movements a close-fire range is again obtained.
The grate bottom, 18, is pivoted at its two front corners, 19, 20, to a frame, 21,
fitted so to be capable of sliding vertically in guides, 23, formed in the fire cheek
plates, 24. The grate bottom, 18, is held up by a curved part, 25, on a bar, 26,
supported at front and back of the range and movable horizontally so as when drawn
forwards to allow the grate bottom, 18, to turn downwards and the ashes to fall out of
the grate; the grate bottom, 18, closing up again when the sliding bar, 26, is pushed
inwards. For lifting the grate bottom, 18, two vertical bars, 27, are arranged in
vertical guides, 28, in the side cheeks, 24, and can be raised by cam pieces, 29, on a

page_text: counterweighted rocking shaft, 30, which can be turned by means of a rod, 31, made
with notches for retaining it in any desired position. When the vertical bars, 27, are
moved upwards, their upper ends, which are made with eyes, 32, are by inclines on
the grate bottom frame, 21, made to move inwards, small pins, 33, on the underside
of the grate bottom frame, 21, entering the eyes, 32, the outer edges of which also
bear on the grate bottom, 18, and the vertical bars, 27, are thereby made to bear up
not only the frame, 21, but also the grate bottom, 18, itself.
The improved ventilating device shown in figures, 9, and 10, is fitted to the
covering plate, 34, at the top of the coving plates (17) and consists of a plate, 35,
fixed internally over an opening in the plate, 34, and itself made with openings which
can be closed or more or less opened by means of an outer slide, 36. The openings in
the plate, 35, are inade with inclined covers, 37, on their upper or inner sides which
covers prevent soot or dust from falling through the openings whilst at the same time
allowing free and full ventilation. This ventilating device may be made either round
or square or of any other suitable shape.
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 :-
-
1-The combination and arrangement of parts forming the improved cooking range
substantially as and for the purposes hereinbefore described.
2 In cooking ranges the improved combination and arrangement of parts for
converting a close-fire range to an open-fire range and vice versa substantially as
herein before described and as shown on the accompanying drawings.
3-In cooking ranges the improved combination and arrangement of parts for
lifting the grate bottom substantially as herein before described and as shown on the
accompanying drawings.
4-In cooking ranges the combination and arrangement of parts constituting the
improved dumping grate bottom substantially as hereinbefore described and as shown
on the accompanying drawings.
5-The improved ventilating openings for the covering plates of cooking ranges
such openings being provided with internal covers substantially as and for the
purposes herein before described.
Dated this Twenty-second day of November 1887.
EDMUND HUNT,
Applicant's Agent.