Improvements in the Mode of and Apparatus for the Manufacture , of Double Hollow Rims for Cycle Wheels and the like.
Year: 1896

page_text: Date of Application, 31st Dec., 1896-Accepted, 8th May, 1397
COMPLETE SPECIFICATION.
Improvements in the Mode of and Apparatus for the Manufacture
, of Double Hollow Rims for Cycle Wheels and the like.
I, EUGEN JULIUS POST, Manufacturer, of 16, Flandrisehestrasse, Köln-Ehrenfeld,
in the Empire of Germany, 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 :-
Soldering of cycle double hollow rims could hitherto. only be effected after the
rounding, that is to say, after the completion of the rim, by means of hard solder,
either by using a soldering stove or a blow-pipe flaue or in an electrical manner.
Preferably there has been used hitherto a blow-pipe flame, but this has always caused
distortion of the rim. In order to avoid this, one has used generally soft solder but
this presents the further inconvenience that such rims, could not be enamelled with
heat because the soft solder became liquid in the enamel stove; such rims have
therefore usually been lacquered only.
1
By means of the production of double hollow rims forming the object of this
invention, the before mentioned inconveniences are all avoided and a completely equal
hard soldering of the rims is made possible without distorting them. The
characteristic features of the invention are, that simultaneously with the production
of the folds between the mantle and the web a solder is introduced into these folds
in the form of a wire, by which it is possible, after the rim has been rounded to the
desired diameter, to effect a hard soldering of the rims by simply introducing them
into a soldering stove or in an electrical manner. A device serving for this kind of
soldering for double hollow rims is shown in the annexed drawing.
Fig. I is a sectional front view; Fig. 2 is a longitudinal section; Fig. 3 is a rear
view; Figs. 4 and 5.show this device as in operation in sectional front view and in
longitudinal section.
A winch or feeder a carries both the plate bands y intended for the mantle and
the web of the double hollow rim and the wires of hard solder.
The device itself consists of the front plate c and the back plate b, which are kept
at convenient distance from one another by bolts 6 of convenient length. Whilst the
plate possesses only the two'slot-like openings b, 62, and the circular openings 63,
the plate-c and the mouth piece co placed thereon possess a larger opening c¹, which
corresponds to the exterior cross-section of a double hollow rim. In this opening lies
a mandril d of convenient cross-section and kept in the right position by means of
the plate b, Fig. 1, as well as thereover, at a small distance corresponding to the
thickness of the web, an inserted block e. The opening is enlarged conically
towards the entrance end whilst the inserted piece e has. on both sides a semi-circular
longitudinal groove e which is enlarged conically also in the head of the inserted
piece inwards and upwards, so that these enlargements, as shown in Fig. 1 in dotted
lines and in Fig. 2 in full lines, correspond with the conical enlargement in the plate c.
In the grooves are folded together the edges of the web and the mantle of the
rim, the hard solder wire being introduced through the holes 3 and carried
into these folds and pulled forwards corresponding to the formation of the double
hollow rim.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The improved method' and means for production of double hollow rims in which'
simultaneously with the folding together of the web and the mantle of the rims, a
hard solder-wire is introduced into the rims or their folds in order to provide after
the rounding for a completely equal hard soldoring of the rims either by simply
-introducing them into a soldering furnace or in an electrical manner.
Dated this 31st day of December 1896.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., Agents to the Applicant.