Improvements in Kitchen Ranges.
Year: 1891

page_text: Date of Application, 8th Apr., 1891
Complete Specification Left, 8th Jan., 1892-Accepted, 26th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Kitchen Ranges.
I GEORGE FREDERICK WILLIAMSON of Midland Foundry, Wellingborough in
the County of Northampton, Ironfounder do hereby declare the nature of this
invention to be as follows:-
This invention relates to kitchen ranges such as have a movable grate to be
employed for raising the fire towards the top plate when a small fire only is
required.
The bars which form the bottom grate are pivoted towards the rear of the stove
so as to turn upon a horizontal bar or rod allowing the foremost part of the bottom
grate to rise and fall to various determined positions governed by a cam. The
cam is preferably made with three resting points to maintain the bottom grate at
its lowest, an intermediate and its highest position according to the position to
which the cam may be turned by a key to be inserted at a convenient point in the
front of the stove to engage with a spindle upon which the can is rigidly fitted.
In order to secure an easy movement for the bottom grate and to make the fire
grate casily accessible I arrange the front bars vertically, being all cast together
in the form of a frame with vertical bars and I fit the frame into the stove so as to
be suspended upon two trunnions, to hang in contact with the bars of the bottom
grate accommodating itself to the movement thereof so as to approach or recede
from the vertical plane according to the position of the bottom plate which moves
in contact therewith below the point of suspension of the trunnions. Lugs or ears
upon the bottom grate may engage the frame of the front bars at the sides so as to
confine the front bars to the movement required to accommodate the rise and fall
of the forward end of the pivoted bottom grate and so avoid any forward movement
of the front bars beyond that which is required for the movement of the bottom
grate as described.
I connect a front movable table with the movable bottom grate by suitable con-
necting rods so that the relative position of the table to that of the fire remains
constant notwithstanding the alteration in the position of the fire due to changes in
elevation of the bottom grate.
Dated this 8th day of April 1891.
AYRTON & THOMAS,
Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Kitchen Ranges.
I GEORGE FREDERICK WILLIAMSON Midland Foundry, Wellingborough in
the County of Northampton, Engineer and Iron Founder 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 kitchen ranges such as have a movable grate to be
employed for raising the fire towards the top plate when a small fire only is
required.
In the accompanying drawings
Figure 1 is a sectional end elevation of the range showing the bottom grate and
the front movable table in their lowermost position.
Figure 2 is a side elevation of the same partly in section showing the bottom
grate and front movable table in their uppermost position.
DA

page_text: Figure 3 is a front elevation of the range.
Figures 4 and 5 are views of the lifting cam drawn to an enlarged scale.
Figure 6 is a plan of the bottom grate, the front bars and the front movable
table, partly in section.
Figures 7 and 8 are views of part of the bottom grate showing in detail the ear
projecting therefrom and fitted with a friction roller instead of the lug, the lug
being required only when the range is to be fitted with a movable front table.
The bars A which form the bottom grate of the fire-place are pivoted by means
of the trunnions a at the rear of the stove so as to allow the fore part of the bottom
grate A to rise and fall to various determined positions governed by the cam B.
The cam B is preferably made with three resting points b c d to maintain the
bottom grate A at its lowest, an intermediate, and its highest position according
to the position to which the cam B may be turned by a key inserted at C in the
front of the stove to engage with the spindle e upon which the cam B is rigidly
fitted.
In order to secure an easy movement for the bottom grate A and to make the
fire place easily accessible I arrange the front bars vertically being all cast together
in the form of a frame D with vertical bars and I fit the frame D into the stove so
as to be suspended upon its two trunnions and hang in contact with the bottom
grate A accommodating itself to the movement thereof so as to approach or recede
from the vertical plane according to the position of the bottom grate which moves
in contact therewith below the point of suspension of the trunnions. I provide the
lugs g which being pivoted upon the ears projecting from the bottom grate A in
front of the projecting cheeks i formed at the sides of the front bars D prevent the
front bars from being swung outwardly away from the bottom grate A unless the
bottom grate A be lifted to a point above its uppermost position defined by
the cam B but by that means the front bars may be swung forward or moved
laterally so as to disengage its trunnions and so completely remove the front
bars D from the range leaving the fire-place completely accessible without obstruc-
tion as may be necessary or useful for cleaning or repairing purposes.
9.
Upon the lugs 1 hang the front movable table E by the hooks k. As the
dependent lugs 9 bear against the inclined surface of the cheeks they hang
approximately vertically notwithstanding the varying inclination of the front
bars D caused by the movement in raising or lowering the bottom grate A.
Consequently though the front movable table rises and falls correspondingly
with the bottom grate A it maintains constantly an approximately horizontal
position.
If the range is not intended to be provided with a front movable table, then
instead of the lugs, g I provide friction rollers t as shown in Figures 7 and 8 to
prevent the front bars from swinging outwardly away from the bottom grate.
l
A set screw engaging in a groove m made in the spindle e of the cam B secures
the cam B in position and a crank pin n projecting from the cam B bears upon a
loose chain p fastened at one end to the cam by the screw rand at the other
end by the staples to the underside of the bottom grate A for the purpose of
forcibly pulling down the bottom grate A in case it should accidentally stick fast in
one of its raised positions.
I have shown a simple form of range to illustrate the improvements which form
the subject matter of my invention but it will be readily understood that the
form of range, the arrangement of boilers or ovens fitted thereto, and the
removable parts of the hot-plate may be varied in the usual way according to
requirements.
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. In a kitchen range provided with a rise and fall bottom grate the combination
of pivoted front bars, a pivoted bottom grate engaging therewith and a device

page_text: for lifting the bottom grate and thereby tilting the front bars substantially as
described.
2. In a kitchen range provided with a rise and fall bottom grate, the cam B
having two or more (preferably three) resting points defining the various positions
to which the bottom grate may be raised or lowered and there be maintained sub-
stantially as described.
3. In a kitchen range provided with a rise and fall bottom grate operated by a
cam, the combination of the crank pin n and the chain p substantially as and for
the purpose described.
4. In a kitchen range provided with a rise and fall bottom grate a front table
suspended from the bottom grate to rise and fall therewith and maintain approxi-
mately a horizontal position throughout its course substantially as described.
Dated this 7th day of January 1892.
AYRTON & THOMAS,
Agents for the Applicant.