IMPROVEMENTS IN LAMPS AND IN MANUFACTURING THE SAME
Year: 1884

page_text: I, THOMAS COOPER JOHN THOMAS of N° 54 Minories, in the County of Middlesex,
Engineer, do hereby declare the nature of said invention for "IMPROVEMENTS IN
LAMPS AND IN MANUFACTURING THE SAME" to be as follows:-
My invention has reference to lamps provided above the oil reservoir or tank
with a hinged or removeable upper plate or cover that carries the burner cone and
also a chimney.
In such a lamp according to my present invention the said plate or cover and
the burner cone are made in one piece by stamping a single sheet of metal, whereof
the central portion is made to form the burner cone whilst the remainder is made
with its under portion concave so that when in place upon the top of the oil
reservoir or tank it shall form a chamber to which air shall have access through
perforations made in the said metal plate or cover. To it is accured a metallic
chimney, of round, square, or other desired cross section, which is made by stamping
two plates each to form a half of the chimney, and fastening the same together by
two longitudinal joints that may be conveniently lapped and rivetted or lapped
and folded at the edges.
The metallic chimney is formed with slots or openings, for the passage of light,
which are suitably glazed-a glass chimney being in some cases used in conjunction
with the metal chimney, when it is of cylindrical form.
By the manufacture of the parts by stamping and joining as above set forth a
strong and convenient lamp may be readily constructed at moderate cost.

page_text: :
COMPLETE SPECIFICATION...
I, THOMAS COOPER JOHN THOMAS, of N° 54 Minories, in the County of
Middlesex, Engineer, do hereby declare the nature of my invention for "IMPROVE-
MENTS IN LAMPS AND IN MANUFACTURING THE SAME," and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement :-
My invention has reference to lamps provided above the oil reservoir or tank
with a hinged or removable upper plate or cover that carries the burner cone and
also a chimney.
In such a lamp according to my present invention the said plate or cover and
the burner cone are made in one piece by stamping a single sheet of metal, whereof
the central portion is made to form the burner cone whilst the remainder is made
with its under side or portion concave so that when in place upon the top of the oil
reservoir or tank, it shall form a chamber to which air shall have access through
perforations made in the said metal plate or cover. To it is secured a metallic
chimney, of round, square, or other desired cross section, which is made by stamping
two plates each to form a half of the chimney and fastening the same together by
two longitudinal joints that may be conveniently lapped and rivetted or lapped and
folded at the edges, or the joints may be brazed butt joints.
The metallic chimney is formed with slots or openings for the passage of light
which are suitably glazed; a glass chimney being in some cases used in conjunction
with the metal chimney, when the latter is of cylindrical form.
In the accompanying sheet of illustrative drawings Fig 1 is a central vertical
section of so much of a lamp as is necessary to illustrate my invention and
Figs 2 and 3 are respectivelý an end elevation and a plan partly in section of
the same.
a is the oil tank or reservoir to which is hinged or pivotted at b* the movable
upper plate or cover b as set forth in my former specification No 7747 A.D. 1884.
This cover b and the burner cone b' are according to my present invention made
in one piece by stamping in the manner hereinbefore described a single sheet of
metal whereof the central portion is made to form the burner cone 6¹, whilst the
remainder is made with its under side or portion concave so that when in place
upon the top of the oil tank or reservoir a as shown, it shall form the chamber a
to which air bas access through perforations f. f made in the said metal plate or
cover. d is the metallic chimney secured to the plate or cover b; it inay be either
of rectangular form (as shown) or of round, square, or other desired form in cross
section. This chimney is according to my present invention made by stamping
two plates each to forun a half thereof, the two halves being afterwards fastened
together by two longitudinal joints d' that may conveniently be lapped and rivetted
or lapped and folded at the edges as hereinbefore mentioned. In Figs 1 and 3 the
joints are shown as being formed by brazing. c. c are the slots or openings
formed in the chimney for the passage of light; they are glazed as shewn, o. o being
sheets of glass, held in place by guides or frames p. secured to the exterior of the
chimney d. A glass chimney may in some cases be used in conjunction with the
metal chimney, when it is of cylindrical form.

page_text: Fig 4 illustrates in vertical section a modified form of lamp wherein b is the
hinged or removable upper plate or cover which with the burner cone b¹ is formed
in one piece by stamping as before. 6 is a plate carried by pillars b³ which in
turn are supported by the top plate al of the oil tank or reservoir a; the plate b
forms with the plate 6' an air space a² to which air has access, as before, through
perforations f. c is the chimney gallery holder provided with air holes at g and
carrying an ordinary glass chimney d.
By the manufacture of the parts by stamping and joining as above set forth a
strong and convenient lamp may be readily constructed at moderate cost.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. Making the hinged or movable upper plate or cover b with burner cone b¹ by
stamping all in one piece substantially in the manner described.
2. Making the chimney & in parts stamped out and joined together in the
manner described.