IMPROVEMENTS IN LAMPS
Year: 1874

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine,
Lake, & Co., Patent Agents, Southampton Buildings, London, for
the Invention of "IMPROVEMENTS IN LAMPS."-A communication
from abroad by Charles H. Leighton, of Lowell, Massachusetts,
United States of America.
Sealed the 13th March 1874, and dated the 21st January 1874.
PROVISIONAL SPECIFICATION left by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition
on the 21st January 1874.
I, WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co.,
Patent Agents, Southampton Buildings, London, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN LAMPS," a communi-
cation, to be as follows:-
The first part of this Invention relates to the combination of a centre
draft tube, having upon it a washer and one lock nut, with the bowl of a
lamp, the object of this part of the said Invention being the firm and
easy securing of a centre draft tube to a lamp. The lock nut in this
case may be in the form of a stand supporting the bowl.

page_text: The second part of the said Invention relates to the combination of
certain operating parts for diminishing or increasing the combustion of
the wick in such a manner that the wick is stationary, the regulating
tube working on the outside of the same, the object of this part of the
said Invention being the regulation of the amount of combustion
without disturbing the wick.
The third part of the said Invention relates to the combination of a
centre draft tube, having upon the same a washer and two lock nuts,
with the bowl and stand of a lamp, the object of this part of the said
Invention being another method of easily and firmly securing the bowl 1
and stand of the lamp together.
The fourth part of this Invention relates to the combination of the
centre draft tube, wick, and inside bushing with the bowl of the lamp,
the object of this part of the said Invention being the collection and re-
distribution of the oil to the wick after the oil has condensed and passed 1
down the inside of and through the openings in the draft tube.
The bowl of the lamp is secured firmly to the stand by means of the
draft tube, having upon the same the washer and lock nuts; or in place
of separate lock nuts, and for the same purpose, I may use the aforesaid
stand. A thumb rod extends through the cap at the rear of the draft 2
tube, and operates the regulating socket by means of a toothed segment
on the said thumb rod working into a rack on the regulating socket.
Between the outside tube of the cap and the regulating socket is placed
the wick.
The stand of the lamp is provided with a collar for "breaking" the a
connection of the bowl and stand. A washer is securely fastened to the
draft tube, and under it is placed a leather or other suitable washer for
preventing the escape of the fluid from the bowl. A bushing is fastened
to the inside of the regulating socket, by means of which the oil that
flows down upon the inside of the same is introduced to the wick a
through the openings in the said regulating socket.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Robert Lake in the Great Seal Patent
Office on the 21st July 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-first day of January, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Robert Lake, Her special
licence that I, the said William Robert Lake, my executors, adminis-
trators, and assigns, or such others as I, the said William Robert Lake,
my executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at 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 "IMPROVEMENTS
IN LAMPS," a communication to me from abroad by Charles H.
Leighton, of Lowell, Massachusetts, United States of America, upon
the condition (amongst others) that I, the said William Robert Lake,
my executors or administrators, by an instrument in writing under
my, or their, or one of their hands and seals, 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 be filed
in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Robert Lake, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by
the following statement, reference' being had. to the accompanying
Drawing forming a part of this Specification:-
The first part of this Invention relates to the combination of a centre
draft tube, having upon it a washer and one lock nut with the bowl of a
lamp, the object of this part of the said Invention being the firm and
easy securing of a centre draft tube to a lamp. The lock nut in this
case may be in the form of a stand supporting the bowl.

page_text: The second part of the said Invention relates to the combination of
certain operating parts for diminishing or increasing the combustion of
the wick in such a manner that the wick is stationary, the regulating
tube working on the outside of the same, the object of this part of the
said Invention being the regulation of the amount of combustion
without disturbing the wick.
The third part of the said Invention relates to the combination of a
centre draft tube, having upon the same a washer and two lock nuts,
with the bowl and stand of a lamp, the object of this part of the said
Invention being another method of easily and firmly securing the bowl 1
and stand of the lamp together.
The fourth part of this Invention relates to the combination of the
centre draft tube, wick, and inside bushing with the bowl of a lamp,
the object of this part of the said Invention being the collection and re-
distribution of the oil to the wick after the oil has condensed and passed 1
down the inside of and through the openings in the draft tube.
DESCRIPTION OF THE DRAWING.
Figure 1 is a section of the said Invention; Figure 2 shows portions
of Figure 1 drawn to an enlarged scale.
A is the bowl of the lamp secured firmly to the stand by means of the 2
draft tube B, having upon the same the washer K and lock nuts H, H,
as shown in Figure 2; or in place of separate lock nuts, and for the
same purpose I may use the stand G, as shown in Figure 1. O is the
thumb rod extending through the cap at the rear of the draft tube, and
operating the regulating socket D by means of a segment on the thumb 2
rod working into a rack on the regulating socket; E is the outside tube
of the cap, between which and the regulating socket is placed the wick;
G is the stand of the lamp; I is a collar for the purpose of "breaking"
the connection of the bowl and stand; K is a washer securely fastened
to the draft tube B, and under which is placed a leather or other suitable 3
washer P for preventing the escape of the fluid from the bowl; M is a
bushing fastened to the inside of the regulating socket, by means of
which the oil that flows down upon the inside of the same is introduced
to the wick through the openings N, N, in the regulating socket.
It may be advantageous, when lamps are made of a metallic sub- 3
stance, to use the stand for the lock nut, as shown in Figure 2, in
cases where no stand is desired, but one lock nut may be necessary.

page_text: By means of the centre draft tube extending through the bowl and
stand a perfectly steady draft of air is furnished, however much the
lamp may be used or moved about. This is not the case when the tube
does not extend through the bowl and stand, but when the supply of air
to support combustion is received through openings in the side of the
tube. In this latter case every movement of the lamp produces a
flickering” of the flame.
"
Having thus fully described the said Invention, as communicated to
me by my foreign correspondent, and the manner of performing the
same, I wish it understood that I claim,—
First. The centre draft tube B extending through the bowl of a lamp
when combined with the lock nut H or equivalent device, packing P,
and washer K, constructed and arranged as herein set forth, and for the
purpose specified.
Second. The combination of the thumb rod C and toothed segment L
with the regulating socket D, constructed and arranged substantially in
the manner set forth as and for the purpose specified.
Third. The combination with a centre draft tube of a lamp of the
lock nuts H, packing P, washer K, and other parts, as above set forth
and for the purpose specified.
Fourth. The combination of the regulating socket D, which has
fastened to its inside the bushing M and other parts forming an "oil
well," as above set forth and for the purpose specified.
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Twenty-first day of July, in the
year of our Lord One thousand eight hundred and seventy-four.
Witness,
HENRY JAMES NOONE,
8, Southampton Buildings,
London.
W. ROB. LAKE. (L.S.)