An Improved Detachable Firing Flue for Bakers' Ovens and like Purposes.
Year: 1898

page_text: Date of Application, 15th Mar., 1898"
Complete Specification Left, 15th Dec., 1898-Accepted, 18th Feb., 1899
An Improved Detachable Firing Flue for Bakers' Ovens and like
Purposes.
We, JOHN HENRY MARTIN, NOAII MARTIN, and BENJAMIN DAVIES MARTIN,
trading as The Nitram Foundry Co., of Okengates, in the County of Salop.
Bakers' Engineers, do hereby declare the nature of this invention to be as
follows:
:―
This invention relates more particularly to firing flues in use in bakers ovens,
and its object is to provide a Hue with all its accessories complete, which may
be readily taken to pieces or refitted, and thus obviate the loss of time and cost
as is at present the case when repairs to flues of ordinary construction are
required.
The invention consists generally in forming the flue of sectional firebricks held
in position by a framework resting upon cross bearers and enclosed at the front
by a suitable firing door and frame attached by T headed bolts to the brickwork
and by suitable grooves to the framework.
The mode of carrying the invention into effect is as follows:-Two transverse
bearers are let in to the ordinary brickwork of the oven and carry upon them
four wedge pieces which in turn carry a rectangular casting which forms the
structional base of the firing flue. The firing flue itself is preferably built up
of three arch firebricks forming the roof thereof, and two on each side forming the
sides of the flue and these rest upon the rectangular frame.
Formed within the two firebricks nearest to the front of the oven are suitable
slots to receive two T headed bolts passing through snogs formed on the frame-
work of the firing-door, the bottom of the framework of this firing-door frame
rests when in position in grooves or catches formed on the rectangular frame-work;
these grooves or catches being so arranged to prevent lateral displacement.
When it is desired to take the firing flue apart for repairs or examination all
that is required is to unscrew the heads from the T bolts and then place a lever
in the space between the transverse bearers and the horizontal framework and
elevate or lever up the frame which carries the sectional brick for a sufficient
distance to free the wedges for removal and to allow the rectangular frame to
take a bearing on the bearers. The door or framework can then be removed
and the fire-bricks constituting the firing flue withdrawn.
It is to be clearly understood that the section of flue, shape of firebricks or
particular purpose to which the flue as a whole is applied may be substantially
varied without departing from the subject of the present invention.
Dated this 15th day of March 1898.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.

page_text: An Improved Detachable Firing Flue for Bakers' Ovens and like
Purposes.
We, JOHN HENRY MARTIN, NOAH MARTIN, and BENJAMIN DAVIES MARTIN,
trading as The Nitram Foundry Company, of Okengates, in the County of Salon,
Bakers Engineers, 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 more particularly to firing flues as used in bakers' ovens,
our object being to provide a flue with all its accessories complete, which may
be readily taken to pieces or refitted without the loss of time and cost involved
when repairs to flues of ordinary construction are required.
Our invention consists generally in forming the flue of sectional or segmental
fire-bricks which are held in position by a framework resting upon cross bearers
and enclosed at the front by a suitable firing and door frame.
In the accompanying sheet of explanatory drawings to be hereinafter referred
to.―
Figure 1 is a front elevation of the side flue of a baker's oven constructed and
arranged in accordance with our invention.
Figure 2 is a plan showing the supporting framework for the sectional fire-
bricks and also door and door frame.
Figure 3 is a front elevation, Figure 4 a plan, and Figure 5 a side elevation
of the sectional fire-bricks, the roof sections being omitted at Figure 5.
Figure 6 is a front or end elevation of the air deflecting scetion in the roof
fire-bricks or sections.
The same reference letters in the different views indicate the same parts
The mode of carrying the invention into effect is as follows-The transverse
bearers AA are let in to the ordinary brickwork of the oven and carry upon them
four wedge or distance pieces as B which in turn carry a rectangular casting ('
which forms the structional base of the firing flue. The firing flue itself is
built up at arch fire-bricks as forming the roof thereof, with sections as E
forming the sides of the flue; the side sections rest upon the rectangular frame C.
Formed within the two fire-bricks or sections nearest to the front of the oven
are suitable slots as c to receive two T headed bolts passing through cars formed
on the frame-work of the firing door F; the bottom of this firing door
frame rests when in position in grooves or catches formed by the projections.
from the rectangular framework C, such grooves or catches being so arranged as
to prevent lateral displacement. The flue is enclosed with the brickwork in
the ordinary manner.
The roof section D₁ is made of a greater depth than the other roof sections 1)
and has a horizontal instead of a concave inner or bottom surface; the lower part
of such roof section will thus project into the flue as shown at Figure 3 and
form a bridge for deflecting the air currents passing through the upper part of the
flue thereby bringing them in contact with the fire beneath. The fire bars, (not
shown in the drawings) are supported by the rectangular frame C.
When it is desired to take the firing flue apart for repairs or examination all
that is required is to unscrew the nuts from the T bolts and remove the fire
bars by then placing a lever in the space as 6 between the transverse bearers
and the horizontal frame-work we can elevate or lever up the frame which
carries the sectional or segmental bricks for a sufficient distance to free the
wedges B for removal and to allow the rectangular frame to take a bearing on

page_text: the bearers A A¹. The door or framework can then be removed and the specially
formed segmental or sectional fire-bricks constituting the firing flue withdrawn.
The shape of the flue and of the sectional or segmental fire-bricks from which
it is built up can be varied to suit the particular purpose for which the flue is
required.
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:
-
1. A detachable firing flue for bakers' ovens and like purposes constructel
from sectional or segmental fire-bricks, substantially as described.
2. In firing flues for bakers' ovens and for like purposes, the combination
of segmental fire-bricks as 1), D¹, and E, and a supporting frame C, with wedges
or distance pieces as 13 interposed between the said frame C and bearers A A¹,
substantially as and for the purpose described and as illustrated.
3. In firing flues for bakers' ovens and for like purposes, the combinations and
attachment with the front segmental fire-bricks as E and the supporting frame C,
of the firing door F and its frame F¹, substantially as described and as illustrated.
1 1
A
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.