provemen
Year: 1895

page_text: Date of Application, 7th Mar., 1895
Complete Specification Left, 9th Dec.. 1895-Accepted, 25th Jar., 1896
Improvemen
I GEORGE FREDERICK WILLIAMSON, of Midland Foundry, Midland Road,
Wellingborough in the County of Northampton, Ironfounder, do hereby declare
the nature of this invention to be as follows:-
--
This invention for improvements in kitchen ranges has for its principal object to
positively operate the rising and falling grate bottom in both its upward and
downward movements, to provide an improved arrangement of down draught for
heating the bottoms of the ovens, to provide an improved arrangement of dampor
in the down flue not liable to become choked or stopped, and to provide an improved
and readily renewable grate bottom.
The grate bottom is pivoted at its back end to the side cheeks and the front bars
which are vertical and cast in one frame are pivoted at their upper end and rest at
their lower end against the front of the grate bottom, lugs on the bottom grate
eliding in grooves in the outer front bars to provent them driving away from the
bottom unless the bottom is raised beyond the maximum height intended for
ordinary use. The movement of the bottom grate is effected by a cam with
notches or resting places and with side lips engaging with projecting | pieces
from the underside of the grate bottom to draw the said bottom downwards.
The grate bottom is made of perforated fire brick or metal fitting in a frame so
that it can readily be renewed.
The side frames of the fire basket extend from the hot plate to the bottom of the
range and are suitably connected by cross pieces and are filled in at the bottom.
The backs of the sides are provided on each side with a projecting ridge that bears
against the oven side so that a down flue is formed. The sides of the fire basket
Are removable and fit and catch on the side frame. They extend to within a
short distance of the hot plate and are provided with a cover plate to close the top
of the down flue and over which the top draught passes. Suitable holes are formed
in the cheeks to admit the flame and gases to the down flues.
The damper for the down draught is pivoted at its upper edge in side slots and
the length of the joint is protected by a projection on the side frames. The damper
is oporated by arms jointed to lugs cast on the underside of the damper and
mounted on sliafts extending to the front of the range. The lower edge of the
damper makes contact when closed with a suitable closing strip cast on the frame.
The whole mechanism is protected and any ashes getting into the down flue fall to
the bottom. From the bottom the down flue passes under the oven, up the far side
to the top.
Dated this 7th day of March 1805
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.

page_text: .
I GEORGE FREDERICK WILLIAMSON, of Midland Foundry, Midland Road
Wellingborough in the County of Northampton 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 for improvements in kitchen ranges has for its principal object to
positively operate the rising and falling .grate bottom in both its upward and
downward movements, to provido un improved arrangement of down draught for
heating the bottoms of the ovens and to provide an improved arrangement of
damper in the down flue not liable to become choked or stopped.
The grate bottom is pivoted at its back end to the side checks and the front
bars which are vertical and cast in one frame are pivoted at their upper end and rest
at their lower end against the front of the grate bottom. Lungs on the bottom grate
aliding in grooves in the outer front bars prevent then driving away from the
bottom unless the bottom is raised beyond the maximum height intended for
ordinary use. The movement of the bottom grate is effected by a cam with
notches or resting places and with side lips engaging with projecting L pieces from
the side of the grate bottom to draw the said bottom downwards.
The side frames of the fire basket extend from just below the bot plate to the
bottom of the rauge and are suitably connected by cross pieces. The side frames
are provided on each side with a projecting rib that bears against the oven side so
that a down flue is formed. The sides of the fire basket are removable and fit and
catch on the side frames. They extend to within a short distance of the hot plate
and are provided with cover plates to close the tops of the down flues and over
which the over draughts pass. Suitable holes are formed in the cheeks to admit
the flame and gases to the down flues.
The damper for each down draught is pivoted at its upper edge in side slots
and the joint is protected by a deflector plate on the side frames. The damper
is operated by an arm pivotted to lugs on the underside of the damper and
mounted on a shaft extending to the front of the range. The lower edge of
the damper makes contact when closed with a suitable closing strip fixed or cast
on the side frame. Any ashes getting into the down flue thus have a clear fall
to the bottom. From the bottom, the down flue may pass under the oven, up the
far side, to the top.
In the accompanying two sheets of illustrative drawings :—Fig. 1 is a sectional
side elevation of the re basket and its supporting parts of a kitchen range
constructed according to this invention, the grate boing in its lowermost position,
and Fig. 2 is a cross section and Fig. 3 is a sectional back elevation of the same
and Fig. 4 is a similar view to Fig. 2 showing the grate in its uppermost position.
The supporting frame of the fire basket comprises the two side chaunel
pieces a extending from just below the hot plate to the bottom of the range and
connected together by the back plate a¹ and front frame b. The webs a' of the
channel pieces bear against the side a of the oven, boiler or the like so that a
vertical flue passage is left on the fire side of the oven, boiler or the like.
The fire basket consists of a rising and faliing grate bottom d, the two sides e
forming parts of the channel pieces a and the frout bars f, all formed separately
and removable. The grate bottom d is provided at its rear end with trunnions d'
bearing in recesses formed near the top of the chanuel pieces a.
The fire basket
sides forming the upper part of the channel pieces a have recesses at their
rear ends forming the top bearings for the trunuions d'. The bottom d

page_text: Each
revolves about the trunnions d' to form a rising and falling grate.
side e is cast with a web e forming a continuation of the front web a' of
the piece a and are retained in place by the rebated bottom edge and th› ‹
front projections el taking into pockets or recesses in the front frame ..
The sides e terminate a short distance from the hot plate to allow space
for the over draught and the top of the down flue is closed at its upper end
by a cover plate e, the end of which rests on the top of tho oven c. Holes e
formed in the sides e admit the hot gases from the fire basket to the down flues.
The front bars fare cast in one piece and with trubnious fat the top edge that
bear in holes in the front frame b so that the front bars can pivot as a whol
about its top edge. The front bars are retained against the bottom by means of
projections on the grate bottom bearing on the front side of a rib cast in
the side edges of the front bars, the ril being cut away at the top as shown in
Figs. 3 & 4 to allow the parts to be put into position. The front bars are thus.
free to adapt themselves to the movement of the bottom grate. As shown the
projections consist of latch levers gladapted to carry a rising and falling front table y
and pivotted on brackets cast on the grate bottom d. The front table g 1s
provided with projections adapted to hook over the latch levers g' so that the
table rises and falls in a horizontal position with the grate bottom.
When the.
9
grate bottom d is in its uppermost position it can be elid bodily backwards to.
remove it. The front barsfcan then be. moved sideways to remove one trunnion
from its hole and then the other. When in position the latch levers g' prevent
this sideways movement and so keep the front bars f'in position as long as the grate
bottom d is in position; at the same time the different parts are perfectly free to
expand and contract without in any way binding themselves.
In order to raise and lower the bottom grate d it is provided underneath with
two L-shaped lugs d. A stepped cam h having ears is mounted in bearings 6*.
secured to the front frame 6 and is rotated by means of a poker or the like
inserted in either of the holes . The outer surface of the can acts to raise
the grate whilst the ears acting on the lugs pull it down. The position
of the grate thus depends absolutely on the position of the cam.
The ears h¹
of the cam h are cut away at the top so that the lugs can pass, when placing.
the bottom grate in the fire basket. At the top of the front bars f is the usual
drop plate or fall bar /.
The drop plate is provided at each side near its lower edge with a pivot
working in a vertical slot 6 in the front frame b. A projecting lug on the
lower end is adapted to engage with either the projection or the projection 6*
and keep the fall bar vertical or horizontal. When vertical it is turned horizontal
by first raising it the pivots sliding in the slots so that the lug rises.
above the projection b. When horizontal it can be turned to the vertical.
position and its own weight causes it to drop to lock itself.
Each down flue is provided with a damper m so that the draft can be stopped
and so arranged that any ashes falling into the down flue drop straight down
past the damper to the bottom. The damper m is pivoted on a horizontal
axia m', the end pivots taking into vertical recesses a' in the webs a' of the channel
pieces a. The deflector plate a cast on the channel piece a serves to deflect any
falling ashes towards the damper opening. The damper has a lug m³ cast ou
its underface by which it is pivotted to the arm n' of a cross shaft " operated by
a handle n³ from the front of the range. The front or lower edge of the damper
makes contact with the strip m' to close the flue. In order to close the
flue, the handle n' on the left of Fig. 3 is moved towards the left and causes
the damper m to assume the position shown at the right side of the figure,
the end pivots of the damper m being free to slide vertically in the recesses a to
allow of the motion. When the damper is opened it clears itself of ashes or dust.
The down flue may join the overdraft at the bottom of the oven or at the top
after passing up the far side of the oven and thence the two pass in the usual way
to the chimney.

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 claim is :-
1. In a kitchen range, the mechanism for raising and lowering the grate bottom
positively consisting of a cam mounted in fixed bearings below the grate bottom,
ears on the cam, a pivotted grate bottom, and undercut projections situated on the
underside of the grate bottom and adapted to engage with the ears on the cam.
2. In a kitchen range, the heating apparatus consisting of a fire basket, a
channelled side frame for the fire basket provided with inlet openings from the fire
basket and forming a down flue, a damper in the said flue having trunnions near its
top edges and engaging in vertical recesses, and a cross shaft on the underside
and behind the damper and provided with an arm adapted to open and close the
damper.
3. In a kitchen range the heating apparatus consisting of a fire basket, a
down flue from the said fire basket, a damper in the said flue having trunnions
Dear its top edges and engaging in vertical recesses, and a cross shaft on the
underside and behind the damper and provided with an arm adapted to open and
close the damper.
4. The improvements in kitchen ranges substantially as described with reference
to the drawings.