Improvements in Oven Lights.
Year: 1890

page_text: Date of Application, 21st Apr., 1890
Complete Specification Left, 17th Dec., 1890-Accepted, 28th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Oven Lights.
I, GEORGE SAMUEL BAKER, of the firm of Joseph Baker & Sons, 58 City Road,
in the County of Middlesex, Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to that class of devices which is used for lighting up the
interior of bakers' and other ovens, especially such as have much steam in them.
In carrying out this invention I prefer to employ a cast iron or other suitable
frame or casing which projects into the interior of the oven through the wall; the
inner end of this case may be preferably formed semicircular and within this
end is placed a circular lantern device which accurately fits the end of the casing
and one side of which is provided with a reflector, gas burner, or equivalent lighting
device and preferably a mica front while the other side may be plain so as to close
up the whole of the opening.
The lantern device may be rotated by means of a toothed ring or portion of a
ring gearing with a pinion upon a shaft the outer end of which carries a handle
outside the face of the oven wall.
:
The light may be provided by gas, electricity or other equivalent means, the one
I will now describe being fitted with gas. The burner is carried upon a vertical
pipe adapted to swing about the centre of motion of the lantern and to move with
the lantern so that the burner always remains in front of the reflector. Any suitable
means may be employed whereby the gas is continually supplied to the burner, no
matter which position it may occupy, but for convenience and economy it is
preferable to so arrange it that when the lantern is turned to light the oven the gas
should be full on, and when it is turned in the reverse position the light should be
turned down low. This may be arranged by means of a suitable plug and barrel,
the plug being a fixture and the barrel turning or vice versa, as already explained
the centre of motion of the burner coinciding with that of the lantern. It is some-
times convenient however to regulate the flame independently of the revolution of
the lantern and this may be done either by having one or two gas supplies provided
with a tap or if preferred by automatic mechanism such as a sliding or equivalent
valve or regulator.
Dated this 21st day of Auxil 1800
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Oven Lights.
1, GEORGE SAMUEL BAKER, of the firm of Joseph Baker & Sons, of 58 City
Road, in the County of Middlesex, Engineer, 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 that class of devices which is used for lighting up the
interior of bakers' and other ovens, especially such as have much steam in them.
In carrying out this invention I prefer to employ a cast iron or other suitable
frame or casing which projects into the interior of the oven through the wall; the
inner end of this case may be preferably formed semicircular and within this end
is placed a circular lantern device which accurately fits the end of the casing and
one side of which is provided with a reflector, a gas burner, or equivalent lighting
Din Q17

page_text: device and preferably a mica front while the other side or back may be plain so as
to close up the whole of the opening.
The lantern device may be rotated by means of a toothed ring or portion of a
ring gearing with a pinion upon a shaft the outer end of which carries a handle
outside the face of the oven wall.
The light may be provided by gas, electricity or other equivalent means, the one
I will now describe being fitted with gas. The burner is carried upon a vertical
pipe adapted to swing about the centre of motion of the lautern and to move with
the lantern so that the burner always remains in front of the reflector. Any
suitable means may be employed whereby the gas is continually supplied to the
burner, no matter which position it may occupy, but for convenience and economy
it is preferable to so arrange it that when the lantern is turned to light the oven the
gas should be full on, and when it is turned in the reverse position the light should
be turned down low. This may be arranged by means of a suitable plug and barrel,
the plug being a fixture and the barrel turning or vice versa, as already explained
the centre of motion of the burner coinciding with that of the lantern. It is some-
times convenient however to regulate the flame independently of the revolution of
the lantern and this may be done either by having one or two gas supplies provided
with a tap or if preferred by automatic mechanism such as a sliding or equivalent
valve or regulator.
In the accompanying drawings.
Fig. 1 is a vertical section on line a-b of Fig. 2 and
Fig. 2 is a horizontal section on line c-d of Fig. 1, both sections being taken
lengthwise of the apparatus.
A is the casing which tapers somewhat towards the front terminating in a semi-
circular form at the lantern end as shown in the drawings. B is the lantern which
carries the reflector C and the semicircular shaped mica front D. The lantern B
is carried upon top and bottom pivots or centres B' around which it is adapted to
turn so as to place either the mica front D or the plain back B2 facing into the
oven. When the mica front faces into the oven the light is projected by the reflector
straight into the oven but when the plain back B2 faces into the oven it closes the
opening and no light passes. The gas jet E carries the burner at its upper end
and the horizontal arm E at its lower end the arm E2 terminating in a sleeve or
socket E³, which makes a gas tight joint upon a hollow vertical plug F which is in
connection with the gas supply pipe G; by this means no matter in what direction
the jet may be turned it always receives its supply of gas through the plug F. As
it is desirable that when the mica front faces into the oven the gas flame should be
full and when the position of the apparatus is reversed and the gas faces into the
casing it should be turned down quite low special means may be adopted to secure
this. For example, a by-pass may be employed the main supply being entirely cut
off when the jet is turned back or a tapered opening may be used only a small
portion of which is open when the jet is turned into the casing. This arrangement
however forming no part of the present invention need not be minutely described.
The gas jet E passing through the hole in the lantern bottom B is turned with it
either to the front or to the back: The top and bottom circular flanges of the
lantern B are made so as to fit against the semi-circular ends A¹ of the casing so
that a tight joint may be secured and the wings B³ of the back portion of the
lantern are so arranged that when the lantern is either closed or opened they
respectively fit against the vertical sides of the opening in the casing. Hitherto
where in apparatus of this description it has been necessary to turn the lantern it
has been necessary to open the door H of the apparatus and turn the lantern either
directly by the hand of the operator or by means of some mechanism contained
inside the casing. In the present instance this may be done by means of the handle I
outside the casing at the oven front. This handle is secured upon the outer end
of the shaft K which passes through the front wall of the casing and is carried in a
suitable bracket or bearing L and carries on its inner end a bevel pinion M. This
gears with a circular or partly circular rack N formed upon or connected with the

page_text: bottom plate B of the lantern so that as the rack is turned the lantern is revolved.
The lantern therefore can thus be readily turned as required by the handle I without
the necessity of opening the door H. The handle is preferably made heavy and so
arranged that it will be in a horizontal position when the lantern is turned either on
or off according to arrangement the weight of the handle thus holding it in that
position. The proportion of the gearing and the general arrangements may be
such that the handle is in a horizontal position upon one side when the lantern is
open and upon the other side when it is closed so that the handle has a tendency
to keep it in either position.
The top bearing of the lantern spindle B' may with advantage be made in two
portions and O so that the lantern may be lifted up and the bottom pivot dis-
engaged and may then be easily withdrawn from the top bearing. The lantern
may also be made with the portion which carries the reflector and the mica front
removable from the rest of the lantern; this movable portion is shown at P.
Suitable stops may be provided for the open and closed positions of the lantern.
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. A lantern apparatus adapted for fitting in the wall of an oven in which the
position of the lantern and light can be changed from open to shut or vice versa
without access to the interior of the casing of the said apparatus substantially as
described.
2. In apparatus such as described the combination with a rotating lantern of a
toothed rack such as N, pinion M, shaft K, and handle I, substantially as and for
the purpose described and illustrated in the accompanying drawings.
3. In an apparatus such as described maintaining the lantern in its open or closed
position by the weight of the handle which operates it, substantially as described
and illustrated in the accompanying drawings.
Dated this 15th day of December 1890
GEORGE SAMUEL BAKER.
W. P. Thompson & Boult,
Agents for the Applicant.