Year: 1894

page_text: Date of Application, 17th Dec., 1894
Complete Specification Left, 17th Sept., 1895-Accepted, 19th Oct., 1895
I, THOMAS CLARKE, of 42 Oldhall Street, Liverpool in the County of Lancaster,
Lamp Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to lamps and more particularly to band lamps such as are
used in warehouses where the fire risk is considerable; and the object of the
invention is to provide a lamp of cheap and simple construction, so arranged that
the outer portions of the top or chimney of the lamp shall not become unduly
heated, and that, while free passage is allowed for the escape of the products "of
combustion, it shall be impossible, when the door of the lamp is locked, to obtain a
light from the lamp, by inserting paper, straw, or the like through the chimney...
The lower or body part of the lamp, the oil reservoir, and the wick regulating
arrangement are of the usual construction, and the door of the lamp is adapted to
be locked.
The top of the lamp is secured to the body in the usual way and it has a central
upwardly projecting conical casing through which the products of combustion
pass; the conical casing is roofed over by a baffle plate secured to the casing by
lugs but the plane of the baffle plate is some distance away from the top of the
casing leaving an annular space between plate and casing for the escape of the
products of combustion. The diameter of the plate is greater than that of
the casing.
I provide a secondary top some distance above and parallel to the ordinary fop,
and from the secondary top a casing is carried up concentric with the inner casing
already referred to; the outer casing is roofed over after the manner described-in
reference to the inner casing and I provide a secondary roof parallel to that of the
outer casing and some distance above it; the two casings thus form the chimney
of the lamp. It will be seen that the top proper of the lamp and its casing are
separated from the secondary top and its casing by an air jacket, and that there is
also an air jacket between the two roofs of the outer casing."
The outer casing is perforated, and a copious supply of air passes in through the
annular space between the two tops and forms an up draught between the casings
which serves the double purpose of carrying away the products of combustion and
keeping the outer parts comparatively cool. Air also passes between the two
roofs of the outer casing and keeps them cool.
wit
The products, of combustion pass away partly through the annular space between
the outer casing and its roof, and partly through the perforations in the former
and the roof or baffle plate over the inner casing is so arranged that it is impossible
to insert paper, straw, or the like through into the inner casing to obtain a light.
I find with this construction that the lamp is exceedingly well ventilated, thatit
gives a good light, and that the various parts are never unduly heated.
10
The different parts of the top may be corrugated for the purpose of strengthening.
or for ornamentation, and the shape of the casings and tops may be modified
without departing from the main features of my invention.
Dated this: 15th day of December 1894.

page_text: I, THOMAS CLARKE, of 42 Oldhall Street, Liverpool in the County of Lancaster,.
Lamp Manufacturer, 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 lamps and more particularly to hand lamps such as
are used in: warehouses where the fire risk is considerable; and the object of the
invention is to provide a lamp of cheap and simple construction, so arranged that.
the outer portions of the top. or chimney of the lamp shall not become unduly
heated, and that, while free passage is allowed for the escape of the products of
combustion, it shall be impossible, when the door of the lamp is locked, to obtain
a light from the lamp, by inserting paper, straw, or the like through the chimney.
lu, the accompanying drawings, Fig. I is an elevation of the improved lamp and
Fig II is a vertical section, the same parts being indicated by the same reference
figures in the two views.
The lower or body part of the lamp, the oil reservoir, the wick regulating,
arrangement and the glazing, being of the usual coustruction, the details of these
are not shown in the drawings; the door of the lamp is adapted to be locked, the
hasp. 1 being provided for this purpose.
The top 2 of the lamp is secured to the body in the usual way and it has a
central upwardly projecting conical casing 3 through which the products of
combustion pass; the conical casing 3 is roofed over by a baffle plate 4 secured
thereto by lugs 5, but the plane of the baffle plate is, as shown, some distance away.
from the top of the casing 3, leaving an annular space 6 between the plate and the
casing, for the escape. of the products of combustion. The diameter of the plate
is greater than that of the casing 3.
I provide. a secondary top 7 some distance above and parallel to the ordinary
top 2, and from the secondary top a. casing 8 is carried up concentric. with and
higher than, the inner casing 3 already referred to; the outer casing 8 is roofed
oven by the plate 9 after the manner already described in reference to the inner
casing 3, and I provide a secondary roof 10 parallel to 9 and some distance above
it. With the object of minimising the conduction, of heat to 10, the distance-
pieces 11 and the, washers 12 are made of non-conducting material such as
earthenware, and the distance-pieces are shouldered down and pass through 10, so
asito avoid contact between the latter and the rivets.
The two casinge 3 and 8 thus form the chimney of the lamp, and it will be seen
that the top proper of the lamp and its casing are separated from the secondary
top and its casing by an air jagket 13 and that there is also an air jacket 14 between
the two roofs of the outer casing,
The outer casing is perforated at 15 and a copious, supply of air passes in through
thecappulag space 13between the two tops as shown by the arrows and forms, an
up draught between the casings which serves the double purpose of carrying away
the products of combustion and keeping the outer parts comparatively cool. Air
als passes, between the two roofs of the outer casing and keeps them cool.
:
The products of combustion pass. away partly through the annultr. space between
the outer casing 8 and its roof, and partly through the perforations 15 in the
former, and the roof or baffle plate 4 over the inner casing makes it impossible to
insert paper, stray, or the like through into the inner casing to obtain a light.
I find with this construction that the lamp is exceedingly well ventilated, that it
gives a good light, and that the various parts are never unduly heated.
The different parts of the top may be corrugated for the purpose of strengthening,

page_text: or for ornamentation, and the shape of the casings and tops may be modified
without departing from the main features of my invention.
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. The improvement in lamps which consists in providing an inner chimney 3
baving a baffle plate 4 of larger diameter, and a perforated outer chimney 8 higher
than the plate 4, and having a double roof 9, 10; substantially as described and
illustrated.
2. The combination with an outer top 7 and outer perforated chimney 8 provided
with a double roof 9, 10, of an inner top 2 and inner chimney 3 provided with a
baffle plate 4, so as to form an annular air circulating space; substantially as
described and illustrated.
3. The combination and arrangement of parts forming the improvement in
lamps, substantially as described and illustrated in the drawings.
Dated this 16th day of September 1895.
SLOAN & LLOYD BARNES,
Castle Chambers, 26 Castle Street, Liverpool,
Agents for the Applicant.
SLOAN & LLOYD BARNES,
Castle Chambers, 26 Castle Street, Liverpool,
Agents for the Applicant.