IMPROVEMENTS IN COAL-OIL LAMPS
Year: 1863

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," No. 12, Southampton Buildings, Chancery Lane, in the County
of Middlesex, Civil Engineer, for the Invention of "IMPROVEMENTS IN
COAL-OIL LAMPS."-A communication from abroad by Michael Boyd
Dyott, of Philadelphia, Pennsylvania, United States.
Scaled the 19th January 1864, and dated the 27th July 1863.
PROVISIONAL SPECIFICATION left by the said George IIaseltine at the
Office of the Commissioners of Patents, with his Petition, on the
27th July 1868.
I, GEORGE HASELTINE, of the "International Patent Office," No. 12,
Southampton Buildings, Chancery Lane, in the County of Middlesex, Civil
Engineer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN COAL-OIL LAMPS," a communication, to be as follows:-
This Invention relates to the burners and cones of coal-oil lamps, and the
nature of my Invention consists in constructing the upper part of the burner
which supports the cone or deflector separately from the lower and main
portion of the burner, and having the upper part provided with a number of
pendent spiral supports, which are slotted nearly their whole length, and fitted
on pins which pass through the upper part of the main portion of the burner,
whereby the upper part of the burner, with the cone and chimney, may be

page_text: raised above the lower part so as to leave the top of the wick of the lamp
accessible or exposed, for the purpose of lighting and trimming it without
detaching either the cone or chimney from the burner.
The nature of my Invention also consists in corrugating the side of the cone
or deflector, or swaging or indenting the same in such a manner that the
chimney which rests upon the base of the cone or deflector cannot, in con-
sequence of any lateral movement or play, cover any of the apertures in the
cone, through which air is admitted to the flame at the outer side of the cone,
thus preventing an objectionable contingency which frequently occurs with tho
cones in ordinary use.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Haseltine in the Great Seal Patent Office on the
23rd January 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," No. 12, Southampton
Buildings, Chancery Lane, in the County of Middlesex, Civil Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of July, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-seventh year of
Her reign, did, for Ierself, Ier heirs and successors, give and grant unto me,
the said George Haseltine, Her special license that I, the said Cicorgo
Haseltine, my executors, administrators, and assigns, or such others as I,
the said George Haseltine, my executors, administrators, or assigns, should
at any time agree with, and no others, from time to time and all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for "Ix-
PROVEMENTS IN COAL-OIL LAMPS," a communication, upon the condition
(amongst others) that I, the said Georgo Haseltine, my executors or admi-
nistrators, by an instrument in writing under my band and seal, or under
the hand and seal of oue of them, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to be
performed, and cause the same to bo filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of the said
Letters Pat 'nt.

page_text: ring having its upper edge scalloped and provided internally with a shoulder
b, for the base of the cone or deflector E to rest upon, see Figure 4. A
screw F passes through the part D to secure the chimney on the cone, the
latter being retained in position on D by means of the chimney, over the
flange at the lower end of which two of the scallops are bent, as shown at
c, c, Figure 4. This arrangement for securing the chimney on the coue, and
securing the latter on the burner, is common to almost all coal-oil lamps, and
therefore does not require a minute description. The upper part D of the
burner has three pendent spiral arnis or supports G, G, G, attached to it.
These arms or supports are of flat form, and are curved or bent, so that
cach will form a portion of the thread of a screw, see Figures 2, 3, and 4. The
arms or supports are slotted longitudinally nearly their whole length, as shown
at a*, and they are connected at their lower ends to a ring or band II. The
arms or supports G, and ring or band 11, are so arranged that they will fit
and work snugly within the lower part A of the burner. Through the upper
part A there pass pins d, which extend through the slots a*, and have washers,
e on their inner ends, as shown in Figure 3. The pins d servo to connect
the two parts A, D, of the burner together, and they also serve as guides for
the arms or supports G.
From the preceding description it will be seen that by turning, the ring or
band H, the latter may be raised above the part A of the burner, so as to
expose the upper end of the wick tube, or said ring or band may be adjusted
down snugly on the top of the part A, the exterior of the ring or band having
a shoulder f, which rests on the top of A.
It will also be seen that by this arrangement the upper part D of the
burner may be raised and lowered with the greatest facility, and that the part
D will be firmly sustained at all points of its movement, because the arms G
form firm supports. This is an important feature of this part of my Inven-
tion, for it is necessary to have firm supports in consequence of the chimney
having considerable weight and exerting quite a powerful lateral strain upon
the burner, in case of its being casually struck by any object, and this con-
tingency is quite likely to occur in lighting and trimming the wick. The
lower ends of the slots a" of the arms G terminate in circular recesses g,
into which the pins d fit, when D is elevated. These recesses 9 prevent the
part D from casually descending. As the part D rises and falls under a
screw motion, it admits of being very readily adjusted, no difficulty being
experienced by the sticking of the parts, as is the case with the kinds previously
arranged; neither are there any parts to conduct heat down into the fountain
or body of the lamp. I do not intend to confine myself to any particular

page_text: number of arms G, for three or four may be used, three however will probably
always be sufficient.
In regard to the second part of my Invention, which relates especially to
the construction of the cone E, the side of its upper part is swaged so as to
produce a series of upright indentations and prominences i, see Figures 5,
the bottom of each indentation, is
6, and 7. The base E of the cone, at
perforated with a hole k. These holes (k) it will be seen by examining
Figure 7, do not extend out quite as far as the prominences i. The base of
the glass chimney rests on the base E of the cone E, and if the chimney
precisely fits the conc, all the prominences i of the latter will be in contact
with the inner surfaces of the base of the chimney, see Figure 7, in which the
chimney is shown in faint lines. If the said chimney be larger in diameter
than the upper part E of the cone, no part of the base of the chimney can
cover any of the holes k, because it is impossible for the base of the chimney
to reach the holes, the prominences i serving as fenders. This will be fully
understood by examining Figure 7. The air then, it will be seen, may at all
times pass up through the holes k into the chimney, and be brought in contact
with the flame above the said cone. Air hitherto has been admitted into the
chimneys of lamps at the outer side of the cones or deflectors in two different
ways. The original plan consisted in perforating the base E of the cone,
near the lower end of the upper part (E), the latter having a smooth or even
exterior. By this plan, however, the base of the chimney would frequently
cover some of the holes, aud admit air at one side of the cone and cut it off
at the opposite side, thereby causing the flame to be imperfectly supplied with
air. In the other plan the base E, instead of being perforated, is corrugated
radially, the base of the chimney resting on the prominences, while the
recesses or channels between the said prominences form air ducts, to admit
air underneath the chimney base and up within the chimney. In this arrange-
ment, as in the other, the base of the chimney will cut off the supply of air at
any point where it is brought into contact with the upper part E of the cone,
and consequently the same disadvantage attends the latter as well as the
former arrangement.
This part of my Invention it will be seen, obviates the difficulty just stated,
for the base of the chimney in my Invention, owing to the prominences i,
and the indentations e, cannot in any event cover the holes k, which
are made in the cone at the bottoms or lower ends of the said inden-
tations e'.
Having thus fully described my Invention of "Improvements in Coal-oil
Lamps," and pointed out its superior utility, I wish it to be understood that I

page_text: do not desire to claim broadly a lamp burner constructed of two parts,
with the upper part so arranged as to admit of being raised and lowered, but
what I claim as new of my Invention, is,―
First, a lamp burner constructed of two parts A, D, connected together by
slotted spiral arms G, and pins d, arranged substantially as shown and
described, to admit of the raising and lowering of the part D, cone E, and
chimney, for the purposo set forth.
Second, I also claim corrugating or swaging the sides of the cone or deflector
E, so as to form prominences or indentations, by which the necessary supply
of air is prevented from being intercepted or cut off, whether admitted through
perforations in the base of the cone, or through air ducts formed by corruga-
tions or prominences upon the base of the cone, substantially as and for the
purpose herein set forth.
In witness whereof, I, the said George Haseltine, have hereunto set
my hand and seal, this Eleventh day of January, in the year of our
Lord One thousand eight hundred and sixty-four.
GEORGE HASELTINE.
(L.8.)