Improvements in Blow-pipe Lamps.
Year: 1899

page_text: Date of Application, 16th Feb., 1899-Accepted, 25th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Blow-pipe Lamps.
I, GUIDO PALAZZI, of 250, Via Roma, Naples, Italy, temporarily of 2, Lonsdale
Road, Bedford Park, Chiswick, London, W., Goldsmith, 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 object of the present invention is to supersede the use of the ordinary
mouth blow-pipe commonly used by goldsmiths, jewellers, and others, in their
work.
The disadvantages attending the use of the mouth blow-pipe are well understood,
and need not be here recapitulated.
The apparatus which forins the subject of the present invention comprises a
small steam boiler, the steam from which is used for giving the required blast
to the flame of the lamp. For the flame, ordinary gas is by preference used,
and also for heating the boiler to generate steam.
In the accompanying drawing, I have shewn a blow-pipe lamp embodying my
invention.
Fig. 1 is a side elevation, and
Fig. 2 is a plan view.
A is the handle of the apparatus, preferably covered with wood or other non-
comductor of heat. Through this handle passes a gas pipe a, which can be
connected to a gas supply by a flexible tube, indicated at .
The larger quantity of the gas entering through the pipe a, proceeds through
the divided pipe a', a¹, to the nozzle B, which encloses the small steam pipe c.
This steam pipe c leads from the boiler C, which is supported in any convenient
manner above the gas burner D, the latter being situated in the branch gas
pipe d, which leads to the pilot jet e placed near the nozzle B. F is a piston
valve controlling the supply of gas from the main pipe a to the pipes a¹, and E
is a similar valve regulating the flow of the gas in the branch pipe d.
boiler C is provided with a steam-tight cover c*, through which it is filled.
The action of the apparatus is as follows:-
The boiler is first charged with water.
The
The burner D and pilot jet e are then lighted, the valve E being normally set
to pass an amount of gas sufficient to support a small flame. When the valve E
is pressed, the flow of gas increases, and, under a larger flame, a head of steam
is soon formed in the boiler. As soon as a fairly strong jet of steam appears
from the pipe c, the main supply of gas through the pipes a¹ a¹ to the nozzle B,
may be opened by pressing the valve F. The gas at once ignites at the pilot jet e,
and the flame is blown into a blast by means of the steam, which blast can be
used for all the purposes for which a blow-pipe flame is now employed.
This apparatus can be readily manipulated by an ordinary workman, and
requires no effort on his part, except the small pressure necessary to open the
valves, which are pressed towards their seats by light coiled springs. The apparatus,
when not in use, can be hung up by means of the hook f, and in that position
the formation of steam in the boiler is retarded.

page_text: The apparatus which is shewn in the drawing, represents a blow pipe lamp
suitable for goldsmiths' use, the boiler being capable of yielding a sufficiency of
steam for an ordinary day's work. The size and proportions of the lamp may
however be varied, to meet the requirements of the particular work for which the
lamp may be intended.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1
1. A blow-pipe lamp of the kind hereinbefore specified, wherein the blast for
the flame is obtained from a steam boiler attached to the lamp, and heated
substantially as described with reference to the drawing.
2. The herein before described blow-pipe lamp, constructed, arranged, and
operating substantially as set forth with reference to the accompanying drawing.
Dated this 16th day of February 1899.
NEWTON & SON,
Agents for the Applicant.