An Improved Automatic Extinguisher for Flat Wick Oil Lamps.
Year: 1894

page_text: Date of Application, 17th Oct., 1894
1
Complete Specification Left, 19th Aug., 1895-Accepted, 21st Sept., 1895
PROVISIONAL SPECIFICATION.
An Improved Automatic Extinguisher for Flat Wick Oil Lamps.
We, WILLIAM JOHN HEATH, of 21, Bride Lane, Engineer, and MATTHEW
CRANSWICK GREENHILL, of 11 Queen Victoria Street, both in the City of
London, do hereby declare the nature of this invention to be as follows:--
This invention relates to an improved automatic extinguisher for use upon oil
lamps of the flat wick burner type, for the purpose of automatically extinguishing
a lamp of the said type in the event of it being unduly tilted or upset.
The extinguisher consists of two pieces of thin sheet metal so connected together
as to move upon a hinge or pivot. These pieces are so shaped that when closed
they enclose and cover the wick, but when opened they drop away from the wick
on each side to give ample space for its burning. Each piece of sheet metal is
approximately square or rectangular in outline, and is shaped by stamping or
otherwise so that three sides are bent or flanged inwardly, while the fourth side
(forming the bottom) or one or more portions thereof, is bent outwardly. The
inward flanges are bent in such a way àud to such an extent that when the two
parts are closed upon each other, they are adapted to enclose within them the wick,
and as the top flanges meet just above the wick when in a vertical position they
cover the same and extinguish the flame. The top flange of each piece is
sufficiently deep to cover the wick in this manner, and therefore to extinguish the
lamp, and the weight of the pieces is so distributed that if the lamp is tilted on one
side or the other beyond a certain degree one of the two pieces drops or closes over
the wick and extinguishes the flame. In the normal position of safety, however,
each piece falls outwardly away from the wick and rests upon the outward portion
or portions of the bottom flange which extends outwardly, and these are supported
upon the platform or gallery of the burner situated within the chimney. The
hinge or pivots used are preferably formed during the stamping operation, by
providing two holes and two projecting pins fitting loosely into the holes and
slightly riveted to hold them together; but care must be taken to avoid friction
which would prevent the action of gravity from automatically closing over the
wick, as soon as either side or both assumes the position of unstable equilibrium.
The lower portion of the extinguisher is perforated to admit air to the burner,
when the former is in its normal position.
Dated this 16th day of October 1894.
FAIRFAX & WETTER,
433 Strand, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
An Improved Automatic Extinguisher for Flat Wick Oil Lamps.
We, WILLIAM JOHN HEATH, of 21, Bride Lane, Engineer, and MATTHEW
CRANSWICK GREENHILL, of 11 Queen Victoria Street, both in the City of
London, 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 an improved automatic extinguisher for use upon oil
1 Price Rd L

page_text: lamps of the flat wick burner type, for the purpose of automatically extinguishing
a lamp of the said type in the event of it being unduly tilted or upset.
The extinguisher consists of two pieces of thin sheet metal so connected together
as to move upon a hinge or pivot. These pieces are so shaped that when closed
they enclose and cover the wick, but when opened they drop away from the wick
on each side to give ample space for its burning. Each piece of sheet metal is
approximately square or rectangular in outline, and is shaped by stamping or
otherwise so that three sides are bent or flanged inwardly, while the fourth side
(forming the bottom) or one or more portions thereof is bent outwardly. The
inward Hanges are bent in such a way and to such an extent that when the parts
are closed upon each other, they are adapted to enclose within them the wick, and
as the top flanges meet just above the wick when in a vertical position they cover
the same and extinguish the flame. The top flange of each piece is sufficiently
deep to cover the wick in this manner, and therefore to extinguish the lamp, and
the weight of the pieces is so distributed that if the lamp is tilted on one side or
the other beyond a certain degree one of the two pieces drops or closes over the
wick and extinguishes the flame. In the normal position of safety, however, each
piece falls outwardly away from the wick and rests upon the outward portion or
portions of the bottom flange which extends outwardly, and these are supported
upon the platform or gallery of the burner situated within the chimney. The
hinge or pivots used are preferably formed during the stamping operation, by
providing two holes and two projecting pins fitting loosely into the holes and
slightly riveted to hold them together; but care must be taken to avoid friction
which would prevent the action of gravity from automatically closing over the
wick, as soon as either side or both assumes the position of unstable equilibrium.
The lower portion of the extinguisher is perforated to admit air to the burner, when
the former is in its normal position.
Fig. 1 is a perspective view of an extinguisher, in the open or normal position,
Fig. 2 shows the two sides closed, as an extinguisher, and
Fig. 3 is a separate view of one of the side pieces, showing the hole and rivet as
formed to join the pieces together.
In these a represents each side piece with its three sides flanged inwardly to
euclose the wick, as stated, b is the bottom flange bent outwardly to form a support,
c is the hinge or pivot, and d is the hole to receive the same.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ;-
The herein described automatic extinguisher for flat wick oil lamps consisting of
two side pieces a, each deeply flanged inwardly to enclose the wick, with a bottom
flange bent outwardly to form a support, hinged together loosely by c and d so as
to automatically close upon the wick when tilted unduly from a horizontal position,
as specified and shown in the drawings.
Dated this 19th day of August 1895
FAIRFAX & WETTER,
Agents for the Applicants.