Improvements in Oil Lamps.
Year: 1890

page_text: Date of Application, 8th Sept., 1890-Accepted, 11th Oct., 1890
COMPLETE SPECIFICATION.
[Communicated from abroad by CASSIUS MONTEZUANA RICHMOND, of 70, West
35th Street, New York City, County and State of New York, United States of
America, Dentist.]
Improvements in Oil Lamps.
1, JOHN SMALLEY CAMPBELL of No. 10 Park Square West in the County of
Middlesex, Engineer 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:-
My invention relates to simple means of moving the wick of a lamp, whether that
wick be flat or round, and of adjusting and directing the internal air supply of an
Argand lamp. The accompanying drawing is a vertical section of an Argand lamp
with my invention applied thereto.
A is the oil reservoir, B the central air tube, O the wick surrounding it, which may
be partly encased in a perforated tube D. At the side of the wick I form a guide
channel E open towards the wick and in this I fit a sliding block F having a tooth or
several teeth Ft projecting from its face so as to penetrate the wick C or the holes of
its perforated casing D.
The block F is attached to a flexible rod G which may be made of twisted wire or
of metal hoop, terminating in a knob to which the finger and thumb can be applied
for the purpose of raising or lowering the wick C. Although I have shewn this device
for moving the wick applied to an Argand wick, obviously it is applicable also to a
flat wick.
In an Argand lamp I apply a similar device for raising and lowering the deflecting
button or the air thimble commonly used in the interior of the wick. I shew this
device applied in the drawing to move an air thimble H which is of special con-
struction according to my invention. Its walls are double, of metal finely perforated,
and it has a top in the form of an inverted cone not perforated, this top serving to
deflect the air from within obliquely against the interior of the flame. The thimble,
or it might be the deflecting button, is attached to one end of a flexible rod K which
passes down through a curved guide tabe L and terminates in a button K' con-
veniently accessible at the base of the lamp. The friction of the rod in the bend of
the tube L suffices to prevent the thimble H or the deflector from shifting.
To the bottom of the air tube B I apply a cup M the sides of which have apertures
corresponding to apertures through the sides of the prolongation of the tube B. By
turning the cup M more or less round so that the two sets of apertures are brought
more or less into coincidence, the quantity of air ascending the tube B can be
regulated as desired. The cup M moreover serves to collect such oil as may leak
down the air tube B.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1. For moving the wick of an oil lamp, a block having teeth engaging the side of
the wick and moved up or down in a guide channel by a flexible rod, substantially as
described

page_text: 8. The construction of air thimble for an Argand burner with double finely
perforated walls and a top of inverted conical form, substantially as described.
4. In combination with the central air tube of an Argand lamp, a cup valve,
substantially as described.
T... Orlton 1400
ABEL & IMRAY,
Agents for the Applicant.