IMPROVEMENTS IN. APPARATUS FOR LIGHTING BY GAS
Year: 1883

page_text: LETTERS PATENT to Ferdinand Arnold Ludwig de Gruyter, of the firm of
F. A. L. de Gruyter, of the City of Amsterdam in the Kingdom of Holland
H!
PROVISIONAL SPECIFICATION left by the said Ferdinand Arnold Ludwig
de Gruyter at the Office of the Commissioners of Patents on the 5th February
1883.
FERDINAND ARNOLD LUDWIG DE GRUYTER of the firm of F. A. L de Gruyter,
of the City of Amsterdam in the Kingdom of Holland,
"IMPROVEMENTS IN.
APPARATUS FOR LIGHTING BY GAS"
This invention relates to improvements in gas lamps whereby they are rendered
especially suitable for use in places such as weaving and spinning rooms where
inflammable materials are treated. The objects of the invention are to prevent
access of inflammable matters to the flame and to utilize much of the heat
generated by combustion by conducting it from the lamp to the gas that is on its
way to the burner to be consumed thereby producing a more luminous flame.
For
these purposes I provide fine wire, netting (or gauze) to the bottom of the lamp
and also to the bottom of its removable cover, to prevent access of inflammable
matters to the flame; and to conduct away a part of the heat generated by com-
bustion, I connect the back of the lamp, (which is of some suitable metal such as
tin or brass,) by means of a metal clip or a connecting device made of material that
is a good conductor of heat, to the gas pipe. Thus heat is conducted from the
main body of the lamp through the connecting device and gas pipe to the gas to be
consumed
A bracket-like projection from the lamp rests on and partly embraces the
horizontal branch of the gas pipe.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Ferdinand Arnold Ludwig de Gruyter in the Great Seal Patent
Office on the 3rd August 1883.
FERDINAND ARNOLD LUDWIG DE GRUYTER of the firm of F. A. L. de Gruyter,
IMPROVEMENTS IN
of the City of Amsterdam, in the Kingdom of Holland.
APPARATUS FOR LIGHTING BY GAS
This invention relates to improvements in gas lamps whereby they are rendered
especially suitable for use in places such as weaving and spinning rooms where
inflammable materials are treated. The objects of the invention are to prevent
access of inflammable matters to the flame and to utilize much of the heat
generated by combustion by conducting it from the lamp to the gas that is on its
way to the burner to be consumed thereby producing a more luminous flame. For
these purposes I provide fine wire netting (or gauze) to the bottom of the lamp
and also to the bottom of its removable cover, to prevent access of inflammable
matters to the flame; and to conduct away a part of the heat generated by com-
bustion, I connect the back of the lamp (which is of some suitable metal such as
tin or brass) by means of a metal clip or a connecting device made of material that
is a good conductor of heat, to the gas pipe. Thus heat is conducted from the
main body of the lamp through the connecting device and gas pipe to the gas to be
consumed.
A bracket like projection from the lamp rests on and partly embraces the
horizontal branch of the gas pipe.
A lamp embodying my improvements is illustrated in the accompanying sheet of
drawings.
Fig. 1 being a side elevation, Fig. 2 a back view with the gas pipe removed.
Fig. 3 a front view, and Fig. 4 a plan with the outer cover removed.
a is the body of the lamp which may be of square section as in the example
illustrated or of other convenient form, and is closed by a tightly fitting cover b.
The bottom of the body a and cover b are as shewn at h h', formed of or provided
with wire netting or gauze for the purpose above mentioned. The front and sides
of the lamp in the example illustrated are glazed, but the back is of some suitable
metal such as tin or brass and is provided at its upper part with a slide c and at its
lower part with a bracket like projection d. A clipe which must be of material a
good conductor of heat such as sheet iron is bent around the gas supply pipe f and
its flanges fit into the slide or guide way c. The projection d rests on and
partly embraces the horizontal part g of the gas pipe. It results from this arrange-
ment of parts that a considerable portion of the heat generated by the combustion
of the gas is conducted by the back of the lamp and the clip or connecting piece e,
projection d and pipe f g to the gas to be consumed thereby producing a more
luminous flame. Much of the heat generated passing from the lamp in this manner
the wire netting or gauze does not become heated to such an extent as would
otherwise be the case and the liability to ignition of inflammable substances deposited
thereon or coming in contact therewith is obviated or mitigated.
Having described the nature of my said invention and the manner in which
the same is or may be carried into practical effect I would have it understood that
what I consider to be novel and original and therefore claim as the invention
secured to me under the hereinbefore in part recited Letters patent is
1. In a lamp or apparatus for lighting by gas the application and employment
of fine wire netting or wire gauze as bottom to the main or body part a of the lamp
and as protective diaphragm or lid b in order to prevent combustible matter from

page_text: falling into the flame of the lamp substantially as described in the foregoing
specification and shown in the accompanying drawings.
2. The arrangement of the guide way d in combination with the device e by
means of which the back wall of the lantern is so connected to the gas supply pipe,
that the heat created by the consumption of gas in the lantern is not only con-
ducted off but simultaneously employed to warm the illuminating gas in its passing
through the supply pipe to the burner substantially as described in the foregoing
specification and shown in the accompanying drawings.
3. The improved lamp or apparatus for lighting by gas substantially as
described in the foregoing specification and shown in the accompanying drawings.
In Witness whereof I the said Ferdinand Arnold Ludwig de Gruyter havo
hereunto set my hand and seal this twenty fifth day of July. A.D. 1883
Witnesses
J HULLMAN.
G PIGEAUD.
FERDINAND ARNOLD LUDWIG DE GRUYTER (L.S.)