IMPROVEMENTS IN GAS BRACKETS, SPECIALLY ADAPTED FOR LIGHTING THE INTERIOR OF BAKERS' OVENS, BUT ALSO APPLICABLE TO OTHER PURPOSES."
Year: 1881

page_text: LETTERS PATENT to Frederick William Thorn, of Elgin Terrace, Maida Vale,
$6
in the County of Middlesex, for an Invention of IMPROVEMENTS IN GAS
BRACKETS, SPECIALLY ADAPTED FOR LIGHTING THE INTERIOR OF BAKERS'
OVENS, BUT ALSO APPLICABLE TO OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said Frederick William Thorn
at the Office of the Commissioners of Patents on the 7th March 1881.
FREDERICK WILLIAM THORN, of Elgin Terrace, Maida Vale, in the County of
Middlesex. "IMPROVEMENTS IN GAS BRACKETS, SPECIALLY ADAPTED FOR
LIGHTING THE INTERIOR OF BAKERS' OVENS, BUT ALSO APPLICABLE TO OTHER
PURPOSES."
Gas brackets constructed as heretofore and used for lighting the interior of bakers'
ovens being subject to great heat the joints thereof soon become worn out, thereby
permitting the gas to escape therefrom.
According to my present Invention I so construct the joint that the parts will
move freely notwithstanding that the bracket is subjected to great heat, and at the
same time the light is automatically raised and lowered by simply turning the arm
into and out of the oven.
For this purpose instead of employing a "swivel back" as heretofore to permit
of turning the arm into and out of the oven, I fix to the latter or in any other
suitable position a case or container, to the lower part of which the gas supply
pipe is hermetically fixed; this pipe rises up through the case or container, and at its
upper end is ground to fit a socket formed in a screw plug screwing into the elbow of
the arm.
The upper part of the case or container is formed inclined, and the lower
part of the said elbow rests thereon, being kept down in contact therewith by a
spring. The elbow is formed or provided with a descending tube surrounding the
interior gas tube and loosely fitting the interior of the case or container, said
container and ascending and descending tubes acting in a similar manner to the
hydraulic joint of a rising and falling gasalier.

page_text: The upper end of the rising gas pipe fits closely against the socket of the screw
plug when the arm is turned back out of use with the exception of a small passage
which enables gas to pass to the burner so as to maintain a small flame at all times
except when the arm is turned into the oven, at which time the elbow being caused
to rise by turning on the incline at the upper end of the case or container carries
the screw plug up with it, and thereby fully uncovers the end of the rising gas tube
when a full supply of gas passes to the burner.
The case or container is filled with any suitable fluid or semi-fluid capable
of sealing and lubricating the joint and of not being too readily evaporated
therefrom

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frederick William Thorn in the Great Seal Patent Office on the
7th September 1881.
FREDERICK, WILLIAM THORN, of Elgin Terrace, Maida Vale, in the County
of Middlesex. "IMPROVEMENTS IN GAS BRACKETS, SPECIALLY ADAPTED FOR
LIGHTING THE INTERIOR OF BAKERS' OVENS, BUT ALSO APPLICABLE TO OTHER
PURPOSES."
Gas brackets constructed as heretofore and used for lighting the interior of
bakers' ovens being subject to great heat the joints thereof soon become worn out,
thereby permitting the gas to escape therefrom.
According to my present Invention I so construct the joint that the parts will
move more freely notwithstanding that the bracket is subjected to great heat, and
at the same time the light is automatically raised and lowered by simply turning
the arm into and out of the oven.
For this purpose instead of employing a "swivel back" as heretofore to permit
of turning the arm into and out of the oven, I fix to the latter or in any other
suitable position a case or container, to the lower part of which the gas supply pipe is
hermetically fixed. This pipe rises up through the case or container, and at its
upper end is ground to fit a socket formed in a screw plug screwing into the elbow
of the arm. The upper part of the case or container is formed inclined, and the
lower part of the said elbow rest thereon, being kept down in contact therewith by
a spring; the elbow is formed or provided with a descending tube surrounding the
interior gas tube and loosely fitting the interior of the case or container, said
container and ascending and descending tubes acting in a similar manner to the
hydraulic joint of a rising and falling gasalier.
The upper end of the rising gas pipe fits closely against the socket of the screw
plug when the arm is turned back out of use with the exception of a small passage
which enables gas to pass to the burner so as to maintain a small flame at all
times except when the arm is turned into the oven, at which time the elbow being
caused to rise by turning on the incline at the upper end of the case or container
carries the screw plug up with it, and thereby fully uncovers the end of the rising
gas tube, when a full supply of gas passes to the burner.
The case or container is filled with any suitable fluid or semi-fluid capable
of sealing and lubricating the joint, and of not being too readily evaporated
therefrom.
And in order that my said Invention may be more clearly understood and.
readily carried into effect, I will proceed, aided by the accompanying Drawings,
more fully to describe the same.

page_text: at its upper end 6' is ground to fit a socket c¹ formed in a screw plug c screwing
into the elbow d¹ of the arm d. The upper part a³ of the case or container a is
formed inclined, and the lower part of the said elbow d' is also inclined and rests
thereon, being kept down in contact therewith by a spring e.
The elbow d¹ is formed or provided with a descending tube d³ surrounding the
interior gas tube b, and loosely fitting the interior of the case or container a, said
container a and tubes 6 and d² acting in a similar manner to the hydraulic joint of
a rising and falling gasalier.
The upper end 6 of the gas supply pipe b fits closely against the socket c¹ of
the screw plug c when the arm & is turned back out of use, as shown at
Figure 5, with the exception of a small passage b² which enables gas to pass to the
burner so as to maintain a small flame at all times, except when the arm d is
turned into the oven, at which time the elbow, being caused to rise by turning on
the incline a² at the upper end of the case or container a, carries the screw plug c
up with it, and thereby fully uncovers the end of the gas supply tube b, when a
full supply of gas passes to the burner.
The case or container a is filled with any suitable fluid or semi-fluid capable of
sealing and lubricating the joint and of not being too readily evaporated therefrom.
The upper end of the case or container a is surrounded by a ring a³ to prevent the
lubricant running down therefrom.
Having thus described the nature of my said Invention, and the mode in which
I carry the same into effect, I would have it understood that what I claim is,
constructing gas brackets in the manner substantially as herein shown and
described, and for the purpose stated.
°
In witness whereof, I, the said Frederick William Thorn, have hereunto set
my hand and seal, this Fifth day of September, in the year of our Lord
One thousand eight hundred and eighty one.
DEDERICK WITTTAM HADN