Year: 1888

page_text: Date of Application, 25th Sept., 1888
Complete Specification Left. 2nd Feb., 1889-Accepted. 16th Mar.. 1889
We, WILLIAM DICKSON, Ironfounder, and ROBERT BURNS BARR, foreman pattern
maker, of the Forth and Clyde Iron Works Falkirk, do hereby declare the nature
of this invention to be as follows
It relates to Stoves and Cooking ranges and has for its objects,
1st to enable a stove or Cooking Range to be used alternately with an open top to
the fire or a closed one as required.
2d to raise, lower and fix the fire grate to (and at) any required level within
the fire space of a stove or Cooking Range.
We effect these objects by means of the mechanism which is hereafter described.
In carrying out our invention we construct a transposable metal flue, which can be
placed upon the back margin, hob or framing of the fire space, between the chimney
and fire back when an open top is required to the fire or can be turned up on end in
front of the chimney when the top of the fire is closed the front part of the chimney
being provided with an opening which connects the convertible and transposable
metal flue with the chimney when required, or is closed by the adjustable flue when
the fire is covered in.
We furnish this moveable flue with pins, projections or catches for retaining it in
permanent connection with the apparatus whilst affording sufficient liberty to move it
about as required.
We also make it removeable from the apparatus and re-adjustable at pleasure.
When this adjustable flue is in use with an open top to the fire it is like a tunnel with
its open end to the front and in line with the fire back and the aperture in the
chimney front, but when in disuse as a flue the open end is turned to the bottom and
the solid roof plate is turned to the front and closes the before named chimney
aperture.
When the apparatus is provided with a complete metal chimney this adjustable flue
may be made either wide enough to over-lap the chimney or small enough to slide
within the front chimney aperture: slots being provided either in the chimney or the
loose metal flue for increasing or decreasing the forward projection of the loose flue
upon the hob to suit varying requirements, such as large or small vessels placed upon
the fire, or to regulate the draught into the chimney.
When the apparatus is intended for use with a brick flue, built behind the range, the
loose metal flue is adjusted within or upon a suitable aperture provided by the
metal "Coves,' Skirting or other framing of the Stove.
" "
2

page_text: In carrying out the second named object of our invention we attach a metal staple
(containing an eye or sleeve or its equivalent) firmly to the back of the fire breast.or
the "frett" plate beneath it and within the said eye, sleeve or other guiding member
which forms a space, open at the top and bottom we fit a loose metal frame or pillar
suitably for sliding up and down within the said sleeve part in vertical planes.
To the top of this loose frame or pillar we attach the horizontal re bottom grate
united (or otherwise) to any flue shutters which may be required and to the lower
part of the loose pillar we fit a toothed quadrant, link or lever of suitable shape and
length for protruding through the "frett" plate of the fire breast.
"
This quadrant, link or lever is not pivotted, or otherwise fastened to the "frett"
or front plate of the range but is intended to slide in and out at a hole or slot in the
front plate according as it is pulled forward or pushed backward by means of a knob
or other shaped handle attached to its outermost end.
If this quadrant is pulled forward it causes the loose frame or pillar to rise,
vertically, within the sleeve formed within the fixed staple and thereby raises the fire
grate, and any fuel thereon, to any required level within the fire space and it is
retained at any such level by means of a self adjusting catch (or latchet) attached
suitably at the back or front of the "frett" plate or fire breast, for engaging with
teeth formed upon the quadrant, link or lever before named.
This catch (or latch) is made to rise up and down in vertical planes, restrained and
guided in its travel by means of pins, studs or other guides connected with the "frett,"
or it may be pivotted to the "frett" on either the right or left side of the quadrant:
or it may consist of any ordinary "pawl."
"
We make this catch (or latch) preferably in the form of a plate or panel containing
one or more apertures with corresponding apertures in the "frett" plate so that by
inserting a poker or other convenient instrument into one of the said apertures the
plate is made to rise sufficiently to disengage it from the notches of the quadrant and
allow the latter to retire backward and inward behind the "frett' as the weight of
the fire bottom grate causes its subsidence to a lower level when the latch is released.
The said latch may be disengaged from its associate notches in any simple manner
other than by pushing the poker into a hole as described it may for instance be
pulled or knocked upwards.
:
we some-
Instead of raising the loose vertical pillar, or frame, which travels up and down
within the sleeve formed in the fixed staple before named, by means of its connection
with the toothed quadrant protruding through a slot hole in the "frett
times effect its elevation by means of a toothed rack formed upon the said pillar or
frame and a pinion wheel or equivalent mechanism united to a. spindle protruding
through the "frett" of the fire breast and into or through the back plate of the
staple the front aperture being a key-hole slot and the hinder one (in the back part
of the staple) a round hole. The spindle consists, in whole or part, of a square bar
which reposes in the lower part of the key-hole slot and thus prevents the weight of
the fire or fire grate, from revolving the spindle until it is lifted out of its rectangular
slot. We lift it from its slot and revolve the spindle by means of a key or.handle.
We are aware that toothed racks, spindles and pinion wheels, or mechanism
equivalent to pinion wheels have been commonly employed in connection with cook-
ing ranges for reducing the fire space, for many years past and in various combinations.
It will therefore be readily understood that we do not claim the use of such a rack,
spindle or pinion wheel or their equivalents, broadly as our invention when dissociated
from their connection with the key-hole slot and the metal (sleeve containing) staple
'herein described.
י
13-> 20
1
1000

page_text: We WILLIAM DICKSON, Ironfounder & ROBERT BURNS BARR, Foreman Pattern
Maker of the Forth & Clyde Ironworks Falkirk 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 stoves and Cooking Ranges, and has for its objects
1st to enable a stove or cooking Range to be used alternately with an open top to
the fire or a closed one as required.
2nd to raise, lower and fix the fire grate to (and at) any required level within the
fire space of a stove or cooking range.
We effect these objects by means of the mechanism which is illustrated in the
diagrams accompanying this specification in which ;
Fig. 1 is a back view in perspective of our convertible metal flue for a cooking
range.
Fig. 2 is a view in perspective of a cast metal chimney for combination with the
convertible metal flue shewn in Fig. 1.
Fig. 3 is a view in perspective of our convertible metal flue and chimney in com-
bination for closed fire purposes.
Figs. 4 & 5 are views in perspective of our convertible metal flue and chimney in
combination for open fire purposes.
Fig. 6 is a plan of our improved cast metal chimney (Fig. 2).
Fig. 7 is a plan of our improved cast metal convertible flue (Fig. 1).
Fig. 8 is a plan of our improved convertible flue and chimney as shewn in Fig. 5.
Fig. 9 is a plan of our improved convertible flue and chimney as shewn in Fig. 4.
Fig. 10 is a view in perspective of our improved "Frett" plate with toothed
quadrant and adjusting mechanism.
Fig. 11 is a perspective view of our improved "Frett" plate with another variety
of elevating quadrant and adjusting mechanism.
Fig. 12 is a front view in perspective of a perforated escutcheon plate which forms
part of the adjusting mechanism shewn in Fig. 10.
Fig. 13 is a back view in perspective of the escutcheon plate shewn in Fig. 12.
Fig. 14 is a front view in perspective of a loose plate or shutter A for sliding within
the cavity B Fig. 13.
Fig. 15 is a back view in perspective of the shutter A reposing in the cavity B
within the escutcheon plate h' Fig. 12.
Figs. 16 & 17 are back views in perspective of sleeve containing staples (marked ()
for fire elevating purposes.
:
Figs. 18 & 19 are views in perspective of vertical pillars marked D for travelling
up and down within the sleeve contained in the staples marked C.
Figs. 20 & 21 are views in perspective of quadrants (marked E) for fire elevating
purposes.

page_text: Fig. 22 13 a back view in perspective of our quadrant lifting fire arrangement.
Figs. 23. 24 & 25 are side elevations (in section) of our quadrant lifting fire
arrangement.
Fig. 26 is a view in perspective of another variety of sleeve containing staple
marked F, and key hole slot Fº.
Fig. 27 is a view in perspective of a sleeve containing staple, F, with combined
spindle and pinion wheel marked G.
Fig. 28 is a view in perspective of a sleeve containing staple F, combined spindle
and pinion wheel G, and vertical pillar marked d².
Fig. 29 is a perspective view of the combined spindle and pinion wheel (marked G
in figs. 27. 28.0 & 31).
Figs. 30 & 31 are sectional views of the fire elevating mechanism which is detailed
in figs. 26. 27. 28. and 29.
In carrying out our invention we construct a transposable metal flue marked A
(see figs. 1. 2. 3. 4 and 5) which can be placed upon the back margin, hob or
framing of the fire space, between the chimney, B and fire back as shewn in
figs. 4 & 5 when an open top is required to the fire, or can be turned up on its end
in front of the chimney as shewn in figure 3 when the top of the fire is closed: the
front part of the chimney being provided with an opening D fig. 2 where the
convertible and transposable metal flue A is united with the chimney B figs. 4 & 5
when required or is closed by the adjustable flue A (as shewn in Fig. 3) when the fire
is covered over.
We furnish this moveable flue A with pins, projections or catches marked F,
figs. 1. 3. 4. 5. 7. 8. and 9 for retaining it in permanent connection with the
apparatus whilst affording sufficient liberty to move it about as required. We also
make it removeable from the apparatus and replaceable at pleasure.
When this
adjustable flue A is in use with an open top to the fire see figs. 4 & 5 it is like a
tunnel with its open end to the front and in line both with the fire back and the
aperture (D.) in the chimney front but when in disuse as a flue the open end G, fig. 3
is turned to the bottom and the solid roof plate (a) is turned to the front and closes
the before named chimney aperture D as shewn in Fig. 3.
When the apparatus is provided with a complete metal chimney this adjustable flue
may be made wide enough to over lap the chimney as shewn in figs. 3. 4. 5. 8 and 9:
slots H being provided either in the chimney or the loose metal flue for increasing or
decreasing the forward projection of the loose flue upon the hob to suit varying
requirements, such as the presence of large or small vessels upon the fire, or to
regulate the draught into the chimney.
When the apparatus is intended for use with a brick flue built behind the range the
loose metal flue is adjusted within against or upon a suitable member provided by the
metal" coves,"
""skirting" or other framing of the stove, all substantially as shewn
in the accompanying drawings.
In carrying out the second named object of our invention, we attach a metal staple
(containing an eye or sleeve or its equivalent) firmly to the back of the fire breast or
the "frett" plate beneath it and within the said eye, sleeve or other guiding meniber
which consists of a space, open at the top and bottom, we fit a loose metal frame or
pillar suitably for sliding up and down within the said sleeve part in vertical
planes.
To the top of this loose frame or pillar we attach the horizontal fire bottom grate,.
united, (or otherwise) to any flue shutters which may be required, and to the lower
part of this loose pillar we fit a toothed quadrant link or lever of suitable shape and
length for protruding through the "frett" plate of the fire breast.
"
This quadrant, (link or lever) which we have marked E Figs. 20 & 21 is not
pivotted, or otherwise fastened to the "frett" or front plate of the range but is
intended to slide in and out at a hole or slot in the "frett or other front plate
according as it is pulled forward or pushed backward by means of a knob or other
shaped handle attached to its outermost end.

page_text: If this quadrant E figs. 20 & 21 is pulled forward it causes the loose frame or pillar
to rise, vertically within the sleeve formed in the fixed staple and thereby raises the
fire grate and any fuel thereon to the required level within the fire space and it is
retained at any such level by means of a self adjusting catch (or latchet) A Fig. 14,
attached suitably at the back or front of the "frett" plate or firebreast, for engaging
with teeth formed upon the quadrant link or lever before nanied.
This catch (or latch) A fig. 14 is made to move up and down in vertical planes,
restrained and guided in its travel by means of pins, studs, recesses or other guides con-
nected with the "frett" or it may be pivotted to the "frett" on either the right or
the left side of the said quadrant E or it may consist of any ordinary "pawl."
"
We sometimes make this catch (or latch) in the form of a plate or panel containing
one or more apertures with corresponding apertures in the "frett" plate so that by
inserting a poker or other convenient instrument into one of the said apertures the
plate is made to rise sufficiently to disengage it from the notches of the quadrant and
allow the latter to retire backwards and inwards behind the "frett as the weight of
the fire bottom grate causes its subsidence to a lower level when the latch is released.
The said latch may be disengaged from its associate notches in any simple manner
other than by pushing the poker into a hole as described: it may for instance be pulled
or knocked upwards..
Instead of raising the loose vertical pillar or frame (which travels up and down
within the sleeve formed in the fixed staple before named) by means of its connection
with the toothed quadrant protruding through a slot hole in the frett, we sometimes
effect its elevation by means of a toothed rack formed upon the said pillar or frame
and a pinion wheel or equivalent mechanism united to a spinille protruding through
the "frett" of the fire breast and into or through the back plate of the staple the
front aperture being a keyhole slot marked F in figure 26 and the hinder one (in the
back part of the staple) a round hole or seat. This spindle consists (in whole or part)
of a square bar which fits and reposes in the lower part of the keyhole slot F and thus
prevents the weight of the fire, or fire grate, from revolving the spindle until it is
lifted out of its rectangular slot. We lift it from its slot and revolve the spindle by
means of a key or bandle marked M figs. 30 & 31.
In further explanation of our first named improvement it may be as well to state
that the metal chimney marked B. Figs. 2. 3. 4 & 5. being composed ordinarily of
two inetal castings screwed together or otherwise united the hinder part is of smaller
dimensions than the front one and when 'the two parts are united they provide an
angular recess marked ( on either side as shewn in figs. 2 and 6 into which recess
the projections F (figs. 1. 3. 4. 57. 8 & 9) are adjusted so that when the metal flue A
fig. 1. is fitted over the chimney B & rests upon the hob it can only be drawn forward
or pushed backward a very little distance either way although it may be turned
upon its end as shewn in Fig. 3 without disengaging the pins F from the said
recesses (*).
When sliding the metal flue A fig. 5 backward in order to reduce the draught or
enlarge the available space for placing utensils upon the open fire we sometimes
employ slits (marked H in figs. 2. 3 and 5) for the purpose of allowing the chimney B
and flue A to be telescoped within and upon each other. These slots H may be made
in either the chimney Bas shewn in fig. 2 or in the metal flue A as shewn in
figure 3.
. .
In order to convert the apparatus from a closed fire stove to an open one any
suitable tool may be inserted within the socket J (figs. 3 & 7) and an upward
forward impulse be imparted to it when the flue A is easily lowered into the
horizontal position shewn in Figs. 4 & 5. The fire cover being then removed the
transition is complete. Then by a reverse action with the same tool the flue A is as
easily restored to its upright position the cover being placed upon the fire the
apparatus is again a close fire stove.
In Figs. 10 to 31 we have shewn certain improved mechanism which we employ
for reducing and enlarging the fire space of a stove or cooking range.
To the back of the frett plate H. Fig. 10 we fix a metal staple C as shewn in

page_text: Figs. 16, 17 and 22 to 25 upon which staple we provide strips marked (2 which serve
to form a sleeve within which the vertical frame or pillar D, Figs. 18. 19. 22 to 25 is
allowed free passage in vertical planes. To the top of this pillar D we attach the
fire bottom grate and to its lower end we unite a curved arm or quadrant E figs. 20
to 25 which passes through the "frett" plate H us shewn in Figs. 10 and 11 and is
retained in any required position by means of a latchet, bolt, cotter, pawl or other
suitable and equivalent mechanism.
In figs. 1 & 12 to 15 we have shewn a simple contrivance for the retention of the
fire at any required elevation. Fig. 13 is a back view of an escutcheon plate h³
which is united to the "frett" plate H and contains a slot corresponding to one
in the "frett" plate H through which the curved arm or quadrant E fig. 20 passes
and within the depressed part B figs. 13 & 15. the bolt A (fig. 14); moves freely up
and down as required and engages with the teeth upon the edge of the quadrant as
shewn in Figs. 23. 24 & 25. Instead of a hollow and perforated escutcheon plate
such as figs. 10. 12. 13. & 15. we sometimes employ a latch hinged or pivotted to the
frett or framework of the range conveniently near for engaging with the toothed
quadrant or fasten the quadrant with a pin or bolt passed through a hole in the
quadrant similarly to the plan and mechanism shewn in Figs. 11 and 21. The loop
or handle which we have shewn to the quadrant in Figs. 10. 11. 20. 21. 23. 24. & 25
may be greatly varied and consist of a knob, hook T piece, or any form suitable for
being grasped by the hand or engaged with a tool.
"
In figures 26. 27. 28. 29. 3 & 31 we have shewn a slightly different sleeve con-
taining staple (to that delineated in figs. 16 & 17) marked.F for attachment to the
back of the "frett" plate H and a pillar frame d which are furnished with a com-
bined spindle and pinion wheel, marked G, fig. 29, for the purpose of raising and
lowering the fire bottom grate J and the fluo damper K (figs. 23 to 31) the spindle G,
fig. 29, being square in section at the front end (which protrudes through the "frett
plate H) is rendered adjustable at any required station by its insertion within the
lower part of the key hole slot, marked F2 in figs. 26 and 30,-a moveable handle
marked M (fig. 30) being used for lifting up and revolving the spindle G. In
figures 30 and 31 it will be seen that when the spindle G is raised up in the key hole
slot and revolved by means of the handle M the frame d² and its superincumbent
grate J are capable of being raised up within the sleeve containing staple F until the
grating J is at its highest elevation (about the middle of the fire breast N as shewn
in figure 31) where the damper plate K covers the flue aperture Q.
Although the shutter plate or damper K as represented in the illustrations herewith
is attached (by rivets, screws or other means) to the hinder part only of the grating J
(so that as the latter rises the plate K covers the flue marked Q which is formed
underneath the Boiler P) we contemplate furnishing two or more sides of. the grate J
with such a shutter or damper plate and attach any or all of them to the grate by
means of hinges, hooks or other equivalent mechanism.
-
We are aware that mechanism for enlarging and reducing the fire spaces of stoves
and cooking ranges has been employed for the last fifty years and in some instances
special arrangements of such mechanism have been patented wherein combined
spindles and pinion wheels and toothed racks have been employed as reducing and
expanding agents so that it will be understood that we do not claim broadly as our
invention the combination of such agents for fire reducing or enlarging purposes
unless they are associated with the key hole slot and sleeve containing metal staple
herein described.
We are also aware that various kinds of fire grate raising and lowering mechanism
are in existence wherein the. fire bottom grate is elevated and depressed horizontally
by means of an arm or lever which is pivotted to the "frett" plate H figs. 10 & 11
and a metal flange or guide plate depending from the underside of the bottom grate,
the said guide plate or flange extending the whole width of the bottom grate and
(unlike our, metal pillar 1)) caused to travel within grooves formed in the side walls
of the ash pit space and not within a sleeve containing staple such as those marked C
or E-herein: '

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is,―
1st in a stove or cooking range the combination with its metal chimney (B) of an
overlapping flanged metal flue A all substantially as herein described & shown & for
purposes specified.
2nd in a stove or cooking range the combination therewith for fire elovating
purposes of a sleeve containing staple C (figs. 16 & 17) united to the "frett" plate
all substantially as herein described & shewn.
3rd in a stove or cooking range the combination therewith of fire elevating
mechanism consisting of a sleeve containing staple (C) united with a pillar or
frame D a sliding quadrant E figs. 20 or 21 and latching mechanism A fig. 14 and h³
fig. 10 all substantially as herein described and shewn & for purposes specified.
4th in a stove or cooking range the combination therewith of fire elovating
mechanism consisting of a staple F fig. 26 a spindle and pinion wheel G fig. 29 a
pillar fig. 28 and a key hole slot F fig. 26 all substantially as herein described and
shown and for purposes specified.
JOSEPH LOCK WOOD,
Argyle Street, Glasgow,
Agent for the Inventor.