Year: 1889

page_text: Date of Application, 15th Jan., 1889
Specification Accepted, 16th Feb., 1889
1, HERBERT JOHN ALLISON of 52 Chancery Lane, London, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention which has
been communicated to me from abroad by James Washington Williams of
the City of Brooklyn, County of Kings, State of New York, United States of
America, Gentleman, and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement
My invention consists in the hereinafter described improvements in the lamp and
its burner.
The single figure in the drawing represents partly in elevation and partly in vertical
central section a lamp containing my improvements.
A is the fluid-reservoir and B is the base thereof. A¹ is the central-draft wick-tube,
the lamp shown being an argand lamp. The base is hollow and the reservoir is
secured thereto by means of a threaded annular flange a¹ which screws upon the base
C³ is the
at b. C¹ is the burner screwed to the neck or top of the reservoir at c.
round wick working on tube A¹. (is the internal wall of the burner constituting
the outer wick-tube and between which and the tube A¹ the wick slides. C³ is the
wick-shifter for raising and lowering the wick.
I form the burner with the polysided perforated wall c¹ preferably octagonal and
with each of its thus formed faces somewhat outwardly curved. I thus obtain an
augmented area of wall surface and consequently an increase of apertures for the
inflow of air to the wick. On the top edge of the wall c¹ I place the horizontal
flange and I form a series of concentric grooves c on the upper face of said flange,
which are adapted to receive chimneys of various sizes at their base. C is a chimney
seated in one of said grooves.
D is a jacket, which may be of metal, glass etc. and which encloses the lamp-
reservoir A and preferably conforms thereto, and it is of such diameter relatively to
This jacket is
the reservoir that it constitutes a chamber outside said reservoir.
preferably in two sections d, d', the lower section d being screwed to the base B by a
Hanged and the upper section d' being screwed by a rim-flange d³ to the top of the
section d. E is a sleeve detachably attached to the neck d of the upper section d¹ of

page_text: the jacket D and surrounding the burner, to the shape of the wall of which it desirably
conforms. The sleeve has the flange e which screws to the jacket-neck, and the body
of the sleeve is perforated as shown. The sleeve is closed at the top by the horizontal
flange carried by the sleeve-body and the inner edge of which fits to the periphery
of the flange c³ on the burner. The upper face of the flange e is formed with a
series of concentric grooves e adapted to receive and support globes or shades of
various sizes. E' is a globe seated in one of said grooves.
The jacket D has the openings d³ whereby air is admitted to it. D¹ is a jacket
which may be applied as shown to the hollow base B, said jackot being perforated at d³
coincidently to perforations b' in said base.
F is a filling-tube extending through the jacket D and into the reservoir and closed
by a cap f.
By means of my improvement as described, while the wick-flame will be furnished
with an augmented air-current through the jacket D entering through the openings do
and passing thence through said jacket to and through the burner-wall c¹, the air
which passes to the said burner-wall through the perforated sleeve E, being thereby
strained and steadied as a current, will, in passing through the perforated burner-wall
mingled with the current from the jacket, serve to steady the entire or combined air
currents, so that while the wick-flame is given additional brilliancy it will also have
greater steadiness, any disturbances in the air external to the lamp not being felt at :
the burner.
My invention is obviously applicable to ordinary flat wick lamps as well as those
having a central draft.
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. In a lamp, the combination with the reservoir A provided with the described
jacket D and the burner C with its perforated wall c₁, surmounted by a flange c³
having concentric grooves, of the perforated sleeve E carried by said jacket and
surrounding said burner and provided with the top-flange e³, adapted to fit snugly to
the flange on the burner, substantially as and for the purpose specified.
2. In a lamp the combination with the reservoir A provided with the described
jacket D, and the burner with its perforated wall c¹ surmounted by the flange ca
having the concentric grooves c in its upper exposed face, of the perforated sleeve E
carried by said jacket and surrounding said burner and provided with the top-flange e
adapted to fit snugly to the flange on the burner and having the concentric grooves e³
in its upper exposed face, substantially as and for the purpose set forth.
Dated this 15th day of January 1889.