Improvements in Oil Lamps.
Year: 1890

page_text: Date of Application, 16th June, 1890
Complete Specification Left, 30th July, 1890-Accepted, 6th Sept., 1890
Improvements in Oil Lamps.
1, JOHN DAVENPORT SHAKESPEAR Institution of Civil Engineers, 25 Great George
Street S.W. Colonel retired from the Royal Artillery A.M. Inst. C.E. do hereby
declare the nature of this invention to be as follows:-
Oil reservoir, circular 54 in. to 4 in. diar. more or less, of tin or other metal and
1 or 14 in. deep in the middle, but tapering to the base that much of the oil is free
from the heating of the wick.
Attached to the burner is a tube of vegetable or other substance not metallic, hence
the wick does not heat the oil as does brass tubing.
Dated this 16th day of June 1890
COMPLETE SPECIFICATION.
Improvements in Oil Lamps.
I, JOHN DAVENPORT SHAKESPEAR of the Institution of Civil Engineers 25, Great
George Street S. W., a Colonel retired from the Royal Artillery 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 :-
"
The nature of my invention is the substitution of animal or vegetable matter in the
place of brass or other metal in the construction of what are known as "wick-tubes
the object being to avoid heating the oil or other liquid fuel contained in the recervoir
or chamber.
Assuming for instance the well known oil called kerosene to be in use at a
temperature of 64° Fahrt. and that an balf-inch cotton wick pass from the burner into
the oil in the recervoir and that it be in a metal tube through the oil.
On careful
examination after one hour, the temperature of the oil will have risen to about
82° Fahrt. and in two hours to about 86° Fahrt. i.e. to 13° Fahrt. above the legal
minimum standard which is 73° Fahrt. (Sir Frederick Abel's test.)
"
Having fully described the nature of my invention I will now shew the manner in
which it is to be used and in doing so will state it to be suitable to the safety of all
kinds of mineral oil lamps, and in illustration will refer to it as adapted in "hand
lamps of my own design for home use. Such hand lamps" are of metal, as I
discard all of glass, china and the like from their, liability to fracture. They are in
size 5 inches in diameter at the base and 14 inches deep in the middle from which
the sides curve downwards to the base; that shape tends to cleanliness and prevents
standing upright on the side should any fall over.
The burner, collar and wick may be of the usual kind but I strongly advocate
more accuracy of fit than the trade usually supplies. The screw of the burner
should be half as long again and the collar deeper and I greatly prefer a wick of
long staple cotton loosely plaited to the finer looking wick too commonly made.
The several holes in the burner tube 1 abolish as being of no use as ventilators
which facilitate the escape of the oil and I totally disapprove the use of long wick
tubes of metal from their heating the oil to excess, but highly approve of them
when of such a substance as vulcanized fibre which is of vegetable matter
impervious to oil and will not take fire and does not heat the oil in the recervoir
but slightly.
The tube is lined with cork or similar material when thought desirable.

page_text: Having now particularly described the nature of my invention and in what
manner the same is to be carried out I declare that what I claim is
The making of wick tubes with vulcanized fibre or other vegetable substance
and of lining them with cork or other like material when thought desirable.
Dated this 30th July 1890.
J. D. SHAKESPEAR.

page_text: Date of Application, 16th June, 1890
Complete Specification Left, 30th July, 1890-Accepted, 6th Sept., 1890
PRUYISIUNAL DECIFICATION.
Improvements in Oil Lamps.
1, JOHN DAVENPORT SHAKESPEAR Institution of Civil Engineers, 25 Great George
Street S.W. Colonel retired from the Royal Artillery A.M. Inst. C.E. do hereby
declare the nature of this invention to be as follows:-
Oil reservoir, circular 54 in. to 44 in. diar. more or less, of tin or other metal and
1 or 1 in. deep in the middle, but tapering to the base that much of the oil is free
from the heating of the wick.
Attached to the burner is a tube of vegetable or other substance not metallic, hence
the wick does not heat the oil as does brass tubing.
Dated this 16th day of June 1890.
JOHN DAVENPORT SHAKESPEAR.
COMPLETE SPECIFICATION.
Improvements in Oil Lamps.
I, JOHN DAVENPORT SHAKESPEAR of the Institution of Civil Engineers 25, Great
George Street S.W., a Colonel retired from the Royal Artillery 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 :-
The nature of my invention is the substitution of animal or vegetable matter in the
place of brass or other metal in the construction of what are known as "wick-tubes"
ihe object being to avoid heating the oil or other liquid fuel contained in the recervoir
or chamber.
Assuming for instance the well known oil called kerosene to be in use at a
temperature of 64° Fahrt. and that an half-inch cotton wick pass from the burner into
the oil in the recervoir and that it be in a metal tube through the oil. On careful
examination after one hour, the temperature of the oil will have risen to about
82° Fahrt. and in two hours to about 86° Fahrt. i.e. to 13° Fahrt. above the legal
minimum standard which is 73° Fahrt. (Sir Frederick Abel's test.)
ני
Having fully described the nature of my invention I will now shew the manner in
which it is to be used and in doing so will state it to be suitable to the safety of all
kinds of mineral oil lamps, and in illustration will refer to it as adapted in "hand
lamps of my own design for home use. Such hand lamps" are of metal, as I
discard all of glass, china and the like from their liability to fracture. They are in
size 5 inches in diameter at the base and 14 inches deep in the middle from which
the sides curve downwards to the base; that shape tends to cleanliness and prevents
standing upright on the side should any fall over.
The burner, collar and wick may be of the usual kind but I strongly advocate
more accuracy of fit than the trade usually supplies. The screw of the burner
should be half as long again and the collar deeper and 1 greatly prefer a wick of
long staple cotton loosely plaited to the finer looking wick too commonly made.
The several holes in the burner tube I abolish as being of no use as ventilators
which facilitate the escape of the oil and I totally disapprove the use of long wick
tubes of metal from their heating the oil to excess, but highly approve of them
when of such a substance as vulcanized fibre which is of vegetable matter
impervious to oil and will not take fire and does not heat the oil in the recervoir
but slightly.
The tube is lined with cork or similar material when thought desirable.

page_text: Having now particularly described the nature of my invention and in what
manner the same is to be carried out I declare that what I claim is
The making of wick tubes with vulcanized fibre or other vegetable substance
and of lining them with cork or other like material when thought desirable.
Dated this 30th July 1890.
J. D. SHAKESPEAR.