Improvements in and relating to Kitchen or Cooking Ranges.
Year: 1893

page_text: Date of Application, 12th Sept., 1893
Complete Specification Left, 7th June, 1894-Accepted, 7th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to Kitchen or Cooking Ranges.
I, ROBERT DOBBIE, of the Firm of Dobbie Forbes & Co. Ironfounders,
Larbert, Stirlingshire, do hereby declare the nature of my invention to be as
follows:-
This invention has reference to and comprises certain improvements in and
connected with either open or close kitchen or cooking ranges, and especially to
the mode of and means for raising and lowering the bottom of the grates to give
various depths of fire, and at the same time maintain the front straight bars in the
front plane of the range, and enable the whole to be fitted to a close slow combustion
fire either with or without a back boiler.
One arrangement of these improvements consist in fitting the bottom grate bars cast
as usual as a brander plate to oscillate on lateral gudgeons or journal studs at the
back side edges, in slotted or semi-circular bearings, cast or otherwise fitted on
the side plates of the fire grate, preferably at the mean height position of the grate
bars so as to allow the front end of these grate bars to lower down say four or five
inches below and rise four or five inches above the level of the back fulcrumed
edge. The front edge of these grate bars are made with short projecting ends
divided and fitted so as to pass in between the vertical front grate bars and prevent
the incandescent fuel; cinders, or ashes from passing down between the bottom
raising and front bars. A further improvement consists in fitting an horizontal
Oscillating spindle or bar in corresponding journal bearings close up to the front
and under the lowest position of the bottom and front bars, and in forming or
mounting on or near the centre of this an eccentric cam plate at right angles and
projecting back under the bottom grate bars and curved elliptically or rounded on the
upper edge to act on a smooth block formed from back to front in the centre of the
lower surface of the bottom grate bars. These bars rest on this cam and are
raised and lowered by it through a lever arm also formed or fitted on the said
horizontal spindle and projecting out through the front closing plate over the ash
box, with a socket hole in the lever for inserting a hand bar for oscillating the spindle
and its cam lever to raise or lower the front of the bottom bars to any desired
position. For retaining the cam lever in its several positions a short curved ratchet
lever is jointed at its inner end to it, and the front end of the lever which has the
ratchet teeth on its lower edge, projects out with a handle on it through a slot in the
front plate the upper edge of which acts as the ratchet catch to hold the cam lever in
any position it is set to. The front vertical bars with the tilting and lowering top
on them are portably fitted in vertical recesses in the side plates of the fire grate for
ease of removal and getting at the cam spindle which can also be easily removed from
its journal bearings as also the bottom grate bars none of them requiring any bolts or
such securing fittings. The grate is also fitted in front with the usual hopper and
fret plate for conducting the ashes which fall through the front bars back down
into the usual ashpan fitted below the bottom of the grate bars, and a front closing
in hood is fitted over this hopper plate to close in the frout bars and prevent air
entering through them, and so make the range act also as a slow combustion fire
when desired.
Dated 11th Sentember 1893.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.

page_text: Improvements in and relating to Kitohen or Cooking Ranges.
I, ROBERT DOBBIE, of the Firm of Dobbie Forbes & Co. Ironfounders,
Larbert, Stirlingshire, do hereby declare the nature of my invention, and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement in writing, that is to say :--
This invention has reference to and comprises certain improvements in and
connected with either open or close kitchen or cooking ranges, and especially to
the mode of and means for raising and lowering the bottom of the grates to give
various depths of fire, and at the same time maintain the front straight bars in the
front plane of the range, and enable the whole to be fitted to a close slow combustion
fire either with or without a back boiler.
And in order that my said invention and the manner of performing or carrying
the same into effect or practice may be properly understood, I have hereunto
appended an explanatory sheet of drawings, in which Figure 1 represents a side
sectional elevation of the grate part of a cooking range as fitted with my
improvements; and Figure 2 represents a corresponding front view with part of
the front plate removed to show the internal fittings.
* Referring to these drawings:-The improvements consist in fitting the bottom
grate bars cast as usual as a brander plate A to oscillate on lateral gudgeons or
journal studs A' at the back side edges, in slotted or semi-circular bearings, cast
or otherwise fitted on the side plates of the fire grate, preferably at the mean height
position of the grate bars so as to allow the front end of these grate bars to lower
down say four or five inches below and rise four or five inches above the level of
the back fulcrumed edge A¹. The front edges of these grate bars A are made with
short projecting ends A' divided and fitted so as to pass in between the vertical
front grate bars F and prevent the incandescent fuel, cinders, or ashes from passing
down between the bottom raising and front bars. An horizontal oscillating spindle
or bar B is fitted in corresponding journal bearings at B' close up to the front and
under the lowest position of the bottom and front bars, and an eccentric cam plate
or lever C is formed on or mounted near the centre of spindle B and at right
angles thereto and projects back under the bottom grate bars A and is curved
elliptically or rounded on the upper edge C₁ to act on a smooth block A³ formed
from back to front in the centre of the lower surface of the bottom grate bars A.
These bars A rest on the end C¹ of cam plate and are raised and lowered by it
through a lever arm C' which may be formed in one with said cam plate C, as
shown in Figure 1, or be formed or fitted on the horizontal spindle B, and project
out through the front closing plate D over the ash box D' with a socket hole Cin
the lever C³ for inserting a handle E for oscillating the spindle B and its cam
lever C C to raise or lower the front of the bottom bars A to any desired position.
For retaining the cam lever C C' in its several positions a short curved ratchet
lever E' is jointed at its inner end E to it, and the front end of the lever which
has the ratchet teeth on its lower edge, projects out with a handle E on it through
a slot in the front plate D the upper edge of which acts as the ratchet catch to
hold the cam lever C C' in any position it is set to. The front vertical bars :F
with the tilting and lowering top on them are portably fitted in vertical recesses in
the side plates of the fire grate for ease of removal and getting at the cam
spindle B which can also be easily removed from its journal bearings, as also the
bottom grate bars A none of them requiring any bolts or such securing fittings.
The grate is also fitted in front with the usual hopper F1 and fret plate F³ for
conducting the ashes which fall through the front bars F back down into the
usual ashpan D' fitted below the bottom of the grate bars, and a front closing in
hood F is fitted over this hopper and fret plate F' F' to close in the front bars F

page_text: and prevent air entering through them, and so make the range act also as
slow combustion fire when desired.
n.
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 :-
:-
First. In kitchen or cooking ranges, the mounting of the brander plate carrying
the bottom grate bars to oscillate or swivel on lateral gudgeons or journal studs at
the back side edges, in combination with an oscillating cam or lever plate or organ.
to raise or lower said grate bars, substantially as herein described, in reference to
and by way of application shown in the accompanying drawings.
Second. In kitchen or cooking ranges, the arrangement and use of oscillatory
cam or lever plates or organs, to raise or lower the bottom grate bars, substantially
as herein described in reference to and shown in the accompanying drawings.
Third. In kitchen or cooking ranges, the arrangement and combination of
devices for raising and lowering the bottom grate bars, substantially as herein.
described in reference to and shown in the accompanying drawings.
Td the eth don of Lune 1904
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents..
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.