Improvements in or relating to Acetylene Lamps or Generators.
Year: 1899

page_text: Date of Application, 8th Mar., 1399-Accepted, 13th May, 1899
Improvements in or relating to Acetylene Lamps or Generators.
We, AUGUST HERMANN RIEMANN, and HERMANN OTTO RIEMANN, Manufacturers,
both of Dietzelstrasse 1, Chemnitz-Gablenz, in Saxony, 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 relates to acetylene lamps or generators and provides an efficient
means of securing the carbide holder to the lamp or generator in an air-tight and
secure manner.
In the accompanying drawing Figure 1 is a vertical section, and Figure 2 a
horizontal section, on the line of Figure 1, of the invention as provided
for the carbide holder of an acetylene lamp.
The arrangement is as follows:-
The carbide holder A is contained in a case B, the upper rim or part of which
is provided with two or more hooked flanges or plates C.
The lower part of the body or base of the lamp or generator Dis formed into
or provided with a circular flange E broken away at parts so as to form free
spaces F of a width equal to or greater than that of the hooked flanges C and to
correspond, as regards position with said hooked parts. The circular flange E
is shaped like a gutter open at its upper end, so that when the two parts are placed
together the hooked parts pass through the free space and then by rotating the two
parts relatively to each other, the hooked parts will engage in the corresponding
channels in the lamp body flange, thereby forming a bayonet joint.
To render this joint air-tight and to provide against any accidental disengage-
ment, the bottom B¹ of the case B is provided with a screw S.-or it may be a
strong spring the end of which is applied to the bottom A¹ of the carbide-
holder A, which screw S can be turned from the outside, in order to press the
carbide-holder A against the body D of the lamp, which is provided with suitable
packing G. and to draw the case B downwards with such force, that a firm and
unyielding interlocking of the bayonet joint is secured.
In such manner a perfectly gastight connection is secured by a device which may
be readily locked or unlocked when required.
Of course the interlocking device may be arranged on the inside instead of
on the outside of the part to be connected.
Instead of the case B a simple yoke or yokes with its ends bent inwards, may
be used; but the first described arrangement will be found to possess great merits
over the other modifications, inasmuch as a securing device is obtained, which
in consequence of its smooth and neat appearance and its absence of projections,
levers and screws will always commend itself.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. Means for securing the carbide-holder to the body of an acetylene lamp or
generator comprising a case to contain the carbide-holder and a downwardly

page_text: extending flange on the body of the lamp, the two flanges being provided with a
bayonet joint and means at the bottom of the case for pressing the under rim of
the carbide holder against the packing material on a seating on the lamp body
whereby a gas tight joint is produced and the outer case is pressed downwards
with such force as, to secure an efficient engagement of the parts forming the
bayonet joint, substantially as described.
2. Means for securing the carbide holder to the body of an acetylene lamp or
generator comprising a case to contain the carbide holder and a downwardly
extending flange on the body of the lamp, the two flanges being provided with
interhooking parts engaging as a bayonet joint, and a screw passing through the
bottom of the case and adapted to press the carbide holder upwards against the
packing material on a seating on the lamp body whereby a gastight joint is
produced and the hooks constituting the bayonet joint are securely interlocked,
substantially as described.
3. The complete means for securing the carbide holder to an acetylene lamp or
generator substantially as described or illustrated in the accompanying drawings.
Dated this 8th day of March 1899.
BOULT & WADE,
Agents for the Applicants.