MENTS IN COOKING RANGES
Year: 1885

page_text: I, JOSEPH LOCKWOOD Artist, of 18 Vale View Terrace Langside Glasgow in the
County of Renfrew do hereby declare the nature of my invention for IMPROVE
MENTS IN COOKING RANGES to be as follows :-
:-
It consists of an arrangement of novel appliances by which the fire cover of a
close fire cooking range may be removed from its place over the fire and utilised as
a flue in conjunction with the principal one behind the range.
By this arrangement, a cooking range may be used with an open fire or a close
one, alternately, as required.
The aforesaid arrangement consists,
First, in making the fire cover with two deep side flanges, depending from its
under surface and on the right and left sides thereof, which give it the appearance,
when it is removed from over the fire and placed on the hob behind it, of a low,
rectangular bridge or tunnel.
Secondly, in the implements used for the removal of the fire cover. These are
broad ended hooks, of the character commonly called "cup lifters" but with much
broader ends than ordinarily used. With these hooks the fire cover may be lifted
vertically from its natural bed and removed, conveniently to any required place on
the range.
Thirdly in the construction of, as well as in the modes of manipulating, the
moveable part of the hot plate of the range, which is immediately behind the fire.
Fourthly in the arrangement of elliptical flanges behind the range for aiding
the removal of the loose part of the hob before named.
The portion of the hob immediately behind the fire, and covering what is
called the "back strap" of the range, is moveable, and may be described as an angle
piece, with one of its members rising erect from the back edge of the hob and at
right angles to it. This erect part of the angle piece is flush with the cove plate
or skirting at the back of the range and serves the purpose of a damper to close
an aperture in the said cove plate or skirting.
When the fire cover is removed from over the fire the moveable part of the hob,
just described, is pushed backwards into the recess or flue behind the range and
the fire cover takes the place of the angle piece, being pushed into the aperture in
the cove plate or skirting, above named.

page_text: The angle piece, damper or moveable hob, may be quite separate and detached
from the fire cover and propelled horizontally backward or forward independently
of the fire cover or it may be linked, hinged or otherwise connected to the fire
cover and moved simultaneously with the latter.
If it is coupled to the fire cover and required to move simultaneously with it a
provision is made for tilting it upwards into a more or less erect position at the
back of the range by means of curved or elliptical flanges or cams provided and
attached there for the purpose,
The channel in which the above named moveable hob, or angled damper, is laid,
may be either shallow or deep as required. If it is deep the angled piece partakes the
form called a T (Tee) piece and the channel is flanked on either side (right and left)
with ledges upon which the flanges of the fire cover may rest. The corresponding
or reciprocating ends of the said ledges and flanges being curved or bevelled in order
to assist the backward and upward movement of the flanged fire cover when
changing from "close fire to " open fire arrangement.
"

page_text: I, JOSEPH LOCKWOOD Artist of N° 18 Vale View Terrace Langside, Glasgow
in the County of Renfrew, North Britain do hereby declare the nature of my
invention for IMPROVEMENTS IN COOKING RANGES and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement:―
My invention relates to Cooking Ranges and comprises a variety of improve-
ments connected therewith; but principally, in new methods of constructing and
operating the flue which is above and behind the fire.
The first agent employed in this invention is a removeable flue of a particular
form and this is associated with other appliances which are (more or less) necessarily
connected therewith, which, together, enable the cooking range to be used with an
open fire or with a closed one alternately as required.
These several appliances are constructed as follows;
First. The fire cover is made with two (or more flanges depending from its
under surface, and on the right & left sides thereof which give it the form of a
low rectangular tunnel and adapt it for use both as a fire cover and a convertible
flue alternately.
Second. The implements employed for lifting and removing the fire cover are.
principally hooks with broad ends (or such other ends as hereafter described).
Third. The part of the hob which is immediately behind the fire cover, is (or
may be) loose, and partakes the form of the letter T or the letter L as occasion
requires and is intended generally to be pushed into the back flue of the range
when the latter is used with an open fire.
Fourth. Curved, elliptical or sloping flanges are provided behind the range to
serve as guides for removing the loose part of the hob into the flue behind the
range.
Fifth. The permanent, or fast, back strap of the range which is immediately
behind the fire is (or may be) placed below the level of the right and left hobs and
thus forms a channel between them. It also furnishes side ledges upon which the
loose part of the hob, and the fire cover, alternately, may rest and slide.
The manner in which the removeable flue thus formed by the fire cover is
utilised, controlled and varied in its union or connection with the flue behind the
range will be hereafter described.
The loose part of the hob and the fire cover may be hinged, linked or otherwise
united together and moved in unison, or may be moved and manipulated quite
independently of each other.
One mode of effecting the conversion of the close fire arrangement into an open
one with the appliances before named is by sliding back the loose hob piece
(commonly called the loose back strap) horizontally into the back flue space and
then lifting the fire cover from over the fire and placing it upon the ledges of the
channel (vacated by the loose back strap) when the transition is complete. This
mode requires no linking, hingeing or other union of the fire cover and looge
hob piece.

page_text: .
Another method is operated thus; the fire cover and loose hob being united, and
guides being provided behind the range as before named the fire cover is elevated
with handles (not the broad ended hooks) and pushed backward. As it recedes it
forces back the loose hob piece into the back flue and takes its place behind the
fire, resting upon the ledges provided by the channelled back strap, the loose hob
piece (eithe Tor L shaped) being guided into the required positions in the back
flue by means of the guides or flanges provided there for the purpose.
The accompanying diagrams will further illustrate this invention, make it better
understood, and more readily carried into effect.
Fig. 1. Is a view of the fire cover with its pendant side flanges and small
rods A. A for lifting purposes on the right and left margins of the cover.
Fig. 2. Is a similar view but with the rods B. B placed at the front and back of
the cover.
Fig. 3. Is a view of Fig. 1 shewing one way in which the broad ended hooks are
applied for lifting and removing this fire cover.
Fig. 4. Is a slightly varied form of the fire cover with a hollow flange at the
back edge for purposes of union with the loose hob peice.
Fig. 5. Is a view of the channelled back strap in its simplest form.
Fig. 6. Is a view of the channelled back strap with raised flange across the
back edge and with an extension for framing the flue behind the back boiler of
the range.
Fig. 7. Is a view of the L shaped loose hob peice.
Fig. 8. Is a view of the T shaped loose hob peice with side pins or projections
C C. for sliding within the elliptical, curved or other guides.
Figs. 9. 10 & 11. Are views of the fire cover and loose hob piece with various
arrangements for hingeing or linking them together, Fig. 11 also gives an indication
of holes H. H. to be hereafter described.
Fig. 12. Is a view shewing the channelled back strap in its position relatively
to the fire box & the hobs of the range and the curved guides are indicated (by
dotted lines D. D.) in their positions behind the range.
Fig. 13. Is a view shewing a section of a range with the loose (L shaped) hob
piece in its position for close fire purposes. The fire box being shewn uncovered.
Fig. 14. Is a view shewing the L shaped loose hob piece pushed back (horizontally)
into the flue behind the range & the flanged fire cover in its position above
the fire.
Fig. 15. Is a view shewing the position occupied by the flanged fire cover upon
the hob when it is used as a convertible flue-The loose hob piece in this case-
is pushed back into the flue behind the range. The holes H. H are hereafter
described.
Fig. 16. Is a side sectional view in perspective shewing the close fire positions
of the flanged fire cover & T-shaped loose hob piece when linked together also the
channelled part under the latter, the curved guides & the flue behind & under the
boiler. The back plate of the range is-(in this view) removed.
Fig. 17. Is a similar sectional perspective side view shewing the relative positions
of the parts shewn in Fig. 16-when the fire cover is utilized as a convertible
flue & the loose hob piece is tilted up into the flue behind the range-The back
plate of the range is (in this view) also removed.
Fig. 18. Is a view intended to shew the manner in which the transition is
effected from close fire to open fire arrangement, when the fire cover & loose hob
are linked together. The handles E. E are (or may be) used as agents in this
operation. In this figure there is no flue represented under the front of the
boiler.
Figs. 19. 20. 21. 22 and 23. Are views of several varieties of the broad ended
hooks for enabling the heavy fire cover, (and other parts of the range which require
to be removed when hot) to be lifted with greater ease & safety than in the manner
formerly employed. These hooks having broad ends keep a perfectly steady control
of the fire cover & will not allow the latter to rock or oscillate during removal and

page_text: as the cross bar F or loop G enable the hooks to be used in vertical positions there
is no strain upon the wrists of the operator. The ordinary "cup lifters" employed
for this purpose are used almost horizontally as levers, with the wrist as a
fulcrum.
Figs. 24. 25 & 26. Are handles suitable for manipulating the fire cover & its
connections in those cases chiefly where the parts are linked together and are not
designed as handles for lifting purposes but for tilting & propelling.
Fig. 27. Is a view shewing a variation in the curved flanges for guiding the
loose hob piece upward into the back flue. The flue behind the boiler is also
defined by this flanged flue box. These curved or sloping flanges may be arranged
for the loose hob to descend-as well as to ascend.
Figs. 28 & 29. Are perspective views of the fast back strap hitherto described as
channelled but here shewn with open or grated sides for the purpose of allowing
the heat from the top of fire to be directed at this point under the right & left hobs
of the range before it is finally discharged into the main flue behind the range.
This is one of the novel appliances before named by means of which the efficiency
of the range for cooking purposes is maintained whether the range is used with an
open fire or a close one.
2.
Fig. 30. Is a view of the several convertible flue appliances shewn in positions
similar to Fig. 18 but designed to illustrate the manner in which the handles
(M. M.) are employed for tilting up, propelling and controlling the fire cover in its
use as a convertible flue the directions in which the heat, which passes over the top
of the back boiler (J) is made to circulate, (a) under the hot plate, (b) down the
back of the boiler, and (c) under the oven; the arrows indicating the several
directions; the dampers (K and L) make it apparent how this current of heat is
(or may be) controlled. The handles M. M. pass through holes at front & back of
cover or long tubes which form part of the fire cover and, as shown in this illus-
tration, enable the fire cover to be purchased upwards and then thrust back into
any required position.
In utilising the fire cover in the various ways herein described as a flue in
conjunction with the principal one behind the range I contemplate occasionally
constructing a flue underneath the boiler behind the fire and discharge the heat
passing through it into the principal back flue of the range behind the boiler in the
manner commonly adopted in close fire cooking ranges.
In order to utilize the flanged fire cover as a convertible flue without depriving
the ovens of the heat they require for cooking purposes when the range is used
with an open fire I have devised a plan for directing when required all the heat
which passes through the said flue under or over the ovens; subject to control by
means of dampers.
The manner in which I effect this is by directing the main body of heat which
passes from the top of the fire over the top of the back boiler down the back of it
and then under the oven (or ovens) before it is allowed access to the principal flue
behind the range. This is readily effected by dampers under the ovens & in the
principal back flue; when the damper under the oven is open & the one in the
principal back flue of the range is closed the heat is compelled-whether the fire
is an open or a close one-to pass over the top and down the back of the boiler
and then circulate underneath and partially round the oven before it obtains vent
into the principal flue. In this manner I utilize the fire cover of the range as a
flue in conjunction with the principal one behind the range,
Having now particularly described and ascertained the nature of my said
invention and in what manner it is to be performed I declare that what
I claim is
First. In a combined open & close fire cooking range the construction of a
fire cover with pendant flanges as shown in Fig. 1 & for the purposes herein
described.

page_text: Second. In a cooking range fire cover the use of rails, rods or catches of more
than three quarter inches in breadth similar to those shewn by A. A. Fig. 1 or B. B.
Fig. 2. for the purpose of lifting the said cover: also for the principle of placing
such catches in the central & marginal positions shewn in Figs. 1 and 3.
.
Third. In a cooking range the use of lifting hooks each having one broad end.
more than three quarters of an inch in breadth as shewn in Fig. 20 for the purpose
of lifting the fire cover; also for lifting hooks with two or more ends such as
Figs. 21 & 23 where the two ends which catch the object are more than three
quarters of an inch overall.
Fourth. In a combined open & close fire cooking range the principle of hingeing
or linking together the fire cover & loose hob piece behind it in the manner shewn
in Figs. 9. 10 & 11, and for the purposes herein described.
'
Fifth. In a combined open & close fire range the use of curved, elliptical or other
sloping guides within the back flue of the range for the purpose of guiding the
loose back strap or loose hob piece of the range into a vertical position (either
upward or downward) withins the said back flue, the principle embodied in this
claim is illustrated in Figs. 12. 16. 17. 18. & 27 and further particularised in the
latter part of the description of Fig. 27.
Sixth. In a cooking range the principle of constructing a flue thro' the perforated
sides of the back strap, or part of the range corresponding thereto, as shewn in
Figs. 18. 28 & 29 in order to heat the hinder part of the hot plate.
い
Seventh. In a cooking range the principle of diverting the heat downwards
behind the back boiler thereof instead of upwards behind the boiler as hitherto
commonly done.
Eighth. In a cooking range the principle of diverting the heat downwards behind
the back boiler thereof & thence under the oven or ovens.
i
- Ninth. In a cooking range the use of rod handles as shewn in Fig. 25 for
manipulating the fire cover together with the principle of using front & back holes
or long tubes connected with the fire cover for the purpose of projecting such rod
handles beneath and beyond the fire cover in the manner and for the purpose shewn
in Fig. 30 and described in the text relating thereto.
Dated this 21st den of Tule. 1000