Year: 1898

page_text: I, WALTER PHILIP BARLTROP, of 141, Evering Road, Stoke Newington, in the
County of Middlesex, Mercantile Correspondent, do hereby declare the nature
of this invention to be as follows:
―:
The object of this invention is to provide a simple, effective and inexpensive
acetylene lamp for use more especially with velocipedes but which can be used
for other purposes. One of the essential features of the lamp is its small pro-
portions and consequent portability.
The lamp consists of two parts, preferably cylindrical in shape and closed at
either end, detachable the one from the other, and united either by a screw
thread or other suitable fastening means, or by the parts fitting tightly
together, the one within the other. The upper part, which is closed a short way
up from the bottom, serves the purpose of a water chamber, and to allow water
to drip on the carbide in the second part below, from which the gas is to be
evolved, and is provided with an inlet for the water covered by a screw cap, and
an outlet controlled by a regulating valve elsewhere described; it has also a
small pipe or passage to convey the gas from the lower part of this chamber to
a burner fixed in the side of said chamber in such a manner that the flame is
projected horizontally, and this burner is surrounded by a parabolic or other
reflector, which in turn is also fixed to the side of the lamp, and from the centre
of which the burner projects.
The water regulator or valve for allowing the water to drop on the carbide,
consists of a metal tube of suitable diameter, threaded on the inside, passing
vertically through the centre of the water chamber and having a suitable number
of small holes one above the other to allow the water to pass through each hole
in an approximately drop by drop manner. Into this tube a threaded metal rod
works, and when screwed home, effectually closes in the water, and contrariwise,
allows one or more holes in the tube to be opened for the water to pass out.
Sometimes I adopt a different method of supplying the water feed. In this case
a metal rod passes vertically through the centre of the water chamber and fits
into a piece of tube rising a short distance from the bottom of said chamber;
the rod is screw threaded at its upper part and is provided at the top with a cap
or button. The rod screws into a fitting, which in turn screws into a female
thread let into the top of the water chamber. When this rod is screwed home
it effectually closes the water outlet. The lower part of this rod is surrounded
by a spiral spring, which is attached thereto and to the bottom of the water
chamber, so that when the rod is unscrewed a given number of turns, the water
is allowed to percolate through the water outlet in an approximately drop by
drop fashion; the more, of course, the fitting at the top is unscrewed, the greater
the water feed, and contrariwise. The fitting at the top of the rod is provided
with one
or more small vent holes, which allow the escape of any excess
accumulation of gas.

page_text: The lower chamber contains the carbide charge, which is put in in the most
convenient manner for serving the purposes of the lamp, but preferably by
means of an inverted cylinder or cone with two walls, the inner chamber to serve
as a feed for the water to drip down and get at the bottom of the carbide, which
latter is surrounded by the outer wall; thus the carbide is attacked upwards
from the bottom of the second chamber.
Dated this 10th day of Nov 1909
Improvements in Acetylene Lamps.
I, WALTER PHILIP BARLTROP, of 141, Evering Road, Stoke Newington, in the
County of Middlesex, Mercantile Correspondent, do hereby declare the nature
of this invention, and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement;--
The object of this invention is to provide a simple, effective and inexpensive
acetylene lamp for use more especially with velocipedes, but which can be used
for other purposes.
One of the essential features of the lamp is its small proportions and consequent
portability.
My invention is illustrated in the accompanying drawings, in which:-
Fig. 1 is a vertical section of the lamp complete and Fig. 2 is an elevation.
partly in section, showing a slight modification.
The lamp consists of two parts A. B, the part A being closed at the top a,
and also a short distance from the bottom by the plate a, whilst the part 1 is
closed at the bottom only, except when it is in connection with the part A.
These parts A B are detachably connected together by a screw thread a² on
the part A and a corresponding screw thread on the part B. Other suitable
fastening means may however be employed, such for instance as a bayonet catch;
or the parts may simply fit tightly together, the one within the other.
The part A serves the purpose of a water chamber and to allow water to drip
into the part 1, where it will gain access to the calcium carbide, from which
the gas is to be evolved. The part A is also provided with a water inlet a³
covered by a screw cap at, and with an outlet a³ controlled by a regulating
valve hereinafter described. It has also a small pipe as fixed to the plate a¹
and communicating with the burner c to convey the gas from the part B to
said burner.
The burner c is fixed in the side of the part A in such manner that the flame
is projected forward horizontally, and it is surrounded by a parabolic or other
reflector d, which is also fixed to the side of the lamp, and from the centre of
which the burner c projects.
The water regulator or valve for allowing the water to drop into the carbide
chamber B, as shown at Fig. 1, consists of an internally screw-threaded metal
tube a of suitable diameter, passing vertically through the centre of the part A
and connected to the top a of said chamber and to the bottom plate a¹. This
tube a has a suitable number of small holes as, one above the other, to allow
the water to pass through each hole in an approximately drop by drop manner.
Into this tube a', a screw-threaded metal rod a works, which, when screwed
home, effectually closes in the water, a perforated rubber seat a being prefer-

page_text: ably employed to assist this action. On unscrewing the rod a³, one or more of
the holes in the tube a may be opened to permit the water to pass out of
the part A.
If desired the arrangement shown in Fig. 2 may be adopted. In this case
a metal rod a passes vertically through the centre of the part A and fits at its
lower end into a piece of tube, or outlet piece, a rising a short distance from
the bottom plate ; this rod a" is provided at the top with a cap or button a¹³
and passes freely through a fitting a, which screws into a female thread formed
in a tube a fixed in the top of the part A. When the fitting is screwed home,
the rod a effectually closes the water outlet; this is effected by the lower part
of this rod being surrounded by a spiral spring a attached thereto and to the
bottom plate a, and by the lower end of said rod a being conical and fitting
a conical hole in the tube or outlet picce a. Thus, when the rod al is raised
by unscrewing the fitting at a given number of turns, the water is allowed to
percolate through the outlet piece a in an approximately drop by drop fashion;
the more
the fitting a is unscrewed, the greater is the water feed, and
contrariwise.
The fitting, a and screw cap are provided with one or more small vent
holes, which allow air to enter the part A and afford escape for any excess
accumulation of gas which may have entered the part A through the valve.
The part B contains the carbide charge, which latter is inserted in the most
convenient manner for serving the purposes of the lamp, but preferably by
means of an inverted cylinder or cone with two perforated walls ce, the inner
chamber or central space serving as a feed for the water to drip down and get
at the bottom of the carbide, which latter is surrounded by the outer wall c and
by the inner wall e¹; thus the carbide is attacked upwards from the bottom of
the part B.
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. A lamp for producing and burning acetylene gas, consisting of an upper
part or water chamber provided with a valve. in its bottom operated by a rod
passing through said upper part, and having a burner in communication with
a gas pipe passing through the bottom of said upper chamber, and a lower
chamber to contain the calcium carbide, said lower chamber being attached gas-
tight to the upper chamber in a removable manner, substantially as herein
shown and described.
2. In a lamp for producing and burning acetylene gas, the combination of
an upper part or water chamber having a valve in its bottom controlled by a
rod passing through said upper part, vent holes for allowing air to enter, and
excess of gas to escape from, said upper part, a horizontal burner fixed in the
side of the lamp centrally of a wind-guard reflector and communicating with the
lower removable part or carbide chamber, and a removable annular perforated
container for the calcium carbide, open on its underside, situated within the
lower removable part, substantially as herein shown and described.
Dated this 9th day of February 1899
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.