Improvements in Acetylene Lamps for Cycles and for other Services.
Year: 1899

page_text: Date of Application, 12th Apr., 1899
Complete Specification Left, 30th Dec., 1899-Accepted, 10th Feb.,
.1900
PROVISIONAL SPECIFICATION.
Improvements in Acetylene Lamps for Cycles and for other Services.
I, AUGUSTINE CAMPBELL DAVISON, of the Firm of Joseph Lucas Limited,
of "Tom Bowling" Lamp Works, Little King Street, in the City of Birmingham,
Manufacturers, do hereby declare the nature of this invention to be as follows: -
This invention consists of improvements in acetylene lamps for cycles and other
services, my object being to construct efficient and reliable lamps of a neat and
convenient form, and to provide simple means whereby the carbide holder can
be very readily secured with or detached from the water vessel or other part of
the lamp.
In constructing a cycle lamp in accordance with my invention I arrange the
water vessel between and in alignment with the lamp body or lantern and the
carbide holder or generator. The lamp body or lantern is of a spherical form
diagonally divided into two parts, one part being fixed rigidly to the upper end
of the water vessel, whilst the other part is hinged upon the said vessel. The
reflecting cone with its hinged glass front, and the perforated hood or cap, are
preferably mounted upon the hinged part of the spherical body or lantern; the
hinged part is secured with the fixed part by means of an ordinary spring catch
or fastening device.
The water vessel is of a cylindrical form with its upper portion necked or
tapered for juncture with the spherical body, and its lower end grooved for the
reception of a rubber or other packing ring. The base plate of the water vessel
is of a conical form, and the enclosed space between its apex and the upper end
of the carbide holder serves as a storage chamber for the gas; the said chamber
communicates by a small tube with the burner within the lantern or lamp body.
The carbide holder or gas generator, consisting of an open top cup shaped
receptacle with a rounded or spherical base, is secured to the underside of the
water vessel and drawn tightly against the packing ring herein before referred to,
by the action of a hinged clamping shackle, preferably having at its lower end a
base piece with a concave surface on the one side corresponding with the convex
surface of the carbide holder, and with its opposite side shaped to serve as a
foot for standing the lamp on a table or plane surface. To permit of detachment
of the carbide holder the clamping shackle has only to be turned at right angles
to the vertical centre line of the lamp, whilst the securing of the holder with the
lamp is effected by simply drawing back the clamping shackle, an efficient clamp-
ing or gripping action being then set up by the passing of the concave surface of
the shackle over the convex base of the holder.
The admission of water to the carbide holder or generator is controlled by
means of a screwed stem, and the lamp is provided with other ordinary fittings
and attachments.
ated this 12th day of April 1899.
MARKS & CLERK.
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, &, 25, Cross Street, Manchester,
Agents for the Applicant.

page_text: improvements in Acetylene Lamps for Cycles and for other Services.
I, AUGUSTINE CAMPBELL DAVISON, of the Firm of Joseph Lucas Limited,
"Tom Bowling" Lamp Works, Little King Street, in the City of Birmingham,
Manufacturers, 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:—
This invention consists of improvements in acetylene lamps for cycles and other
services; my object being to construct efficient and reliable lamps of a neat and
convenient form, and to provide simple means whereby the carbide holder can
be very readily secured with or detached from the water vessel or other part of
the lamp.
In the accompanying sheet of explanatory drawings to be hereinafter referred to.
Figure 1 is a sectional side elevation and Figure 2 an end elevation represent-
ing an acetylene cycle lamp constructed and arranged in accordance with my
invention.
Figure 3 is a side elevation of the lamp showing the carbide holder detached.
The handle, side glasses, and other ordinary fittings are not shown in the
drawings.
-
The same reference letters in the different views indicate the same parts.
In constructing a cycle lamp in accordance with my invention I arrange the
water vessel A between and in alignment with the lamp body or lantern B and
the carbide holder or gas generator C. The lamp body or lantern B is of a
spherical form diagonally divided into two parts, one part being fixed rigidly to
the upper end of the water vessel A, whilst the other part is hinged upon the
said vessel. The cone 1) with its hinged glass front, and the hood or cap E, are
preferably mounted upon the hinged part of the spherical body or lantern B;
the hinged part is secured with the fixed part by means of an ordinary spring
catch or fastening device. The hood or cap E is suitably perforated (not fully
shown in the drawings) to provide efficient ventilation.
The water vessel A is of a cylindrical form with its upper portion necked or
tapered for juncture with the spherical body B, and its lower end grooved for the
reception of a rubber or other packing ring F. The base plate a of the water
vessel is of a conical form, and has attached to it one end of the small tube G,
through which the gas is conveyed to the burner within the lantern or lamp body.
The holder C is provided with the carbide cover plate C, the latter having one
end of the spring C² connected to it. The base plate a being in contact with the
water in the vessel A, serves as a condensing surface for the steam or vapour
rising with the gas from the carbide, and owing to the conical form of the said
base plate the moisture can readily return to the carbide. By the use of such
conical base plate « I am also enabled to provide a good head of water above the
outlet from the vessel A, (such head being essential for the proper burning of
the gas), whilst maintaining the compactness of the lamp and avoiding the
employment of any considerable quantity of waste water, or water not available for
gas generation.
The carbide holder or gas generator C, consisting of an open top cup shaped
receptacle with a rounded or spherical base, is secured to the underside of the
water vessel and drawn tightly against the packing ring F hereinbefore referred
to, by the action of a hinged or pivotted clamping piece or shackle H, preferably
having at its lower end a base piece h with a concave surface on the one side, and
with its opposite side shaped to serve as a foot for standing the lamp on a table

page_text: or plane surface. The radius of the said concave surface is slightly larger than
the convex surface of the base of the carbide holder.
To permit of detachment of the carbide holder, the clamping shackle H has
only to be turned at right angles to the vertical centre line of the lamp, whilst
the securing of the holder with the lamp and the formation of a gas tight joint
between them is effected by simply drawing back the clamping shackle, an efficient
clamping or gripping action being then set up by the passing of the concave
surface of the shackle over the convex base (having a slightly less radius) of the
holder.
The admission of water to the carbide holder or generator is controlled by
means of a screwed stem a¹, and the lamp is provided with other ordinary fittings
and attachments.
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. In acetylene lamps for cycles and for other services, the combination com-
prised by the arrangement of the water vessel, between and in alignment with a
diagonally divided spherical body or lantern part and the carbide holder or
generator, substantially as described.
2. In acetylene lamps for cycles and for other services, the use of a hinged or
pivotted clamping piece or shackle for securing the carbide holder or generator
with the lamp and for the formation of a gas tight joint between them, substan-
tially as described.
3. In acetylene lamps for cycles and for other services, the combination com-
rising a carbide holder or generator as C having a rounded or spherical base,
and a hinged or pivotted clamping piece or shackle as H having a base part h
provided with a concave surface of a radius slightly larger than that of the convex
surface of the said holder C, substantially as described and as illustrated.
4. In acetylene lamps for cycles and for other services, the combination com-
prising a water vessel as A having a conical base a, a carbide holder or generator
as C detachably connected to the said vessel A, and a tube G forming a central
pass through such vessel, substantially as and for the purposes described and as
illustrated.
5. Improved acetylene lamps for cycles and for other services constructed and
arranged substantially as and for the purposes described and as illustrated.
Datad this 20th dor of Deasmhan 1900
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, & 25, Cross Street, Manchester,
Agents for the Applicant.