Improvements in Apparatus for Expanding Holes and Bulges formed in Metal Tubes,
Year: 1899

page_text: Date of Application, 13th Nov., 1899-Accepted, 20th Jan., 1800
Improvements in Apparatus for Expanding Holes and Bulges formed
in Metal Tubes,
We, FRIEDRICH SCHILLING, of 5, Rednitzstrasse, Fürth, Bavaria, Mechanic,
and JOHANN SCHunz, of 139, Landgrabenstrasse, Nuremberg, Germany, Mechanic,
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 improvements in apparatus designed for opening
out the bulges formed in metal tubes in the manner described in Specification
of Letters Patent No. 14747 of the year 1898 granted to the present applicants.
The object of the present invention is to open out the bulges and press or spin
them into a cylindrical form by means of a rotating mandril, movably arranged
and operated by a lever so as to enter an opening formed in the bulge in the
tube, and to enlarge such opening by rotating therein. The mandril is caused to
gradually revolve eccentrically so as to expand the opening into the form of a
cylindrical tube branching from the main tube and constituting a union or means
for connecting one tube to a second cross tube, as in the manufacture of cycle
frames.
Such being the nature and object of the said invention the following is a
complete description of same, reference being had to the accompanying drawings,
in which:-
Fig. 1 is a plau view of the improved apparatus.
Fig. 2 is an enlarged view of the mandril or expander pushed through the
opening of the bulge in the tube.
Fig. 3 is a similar view shewing the mandril or expander in its extended
position inside the formed brunch opening.
According to this invention 1 is the frame of the apparatus, 2 is a shaft driven
by a pulley and supported in bearings on the frame 1. the shaft 2 being
capable of longitudinal movement controlled and operated by the lever 5. On
the right hand end of the shaft 2 is a cylinder 6 having a groove 7 (see Figs. 2
and 3) in which is received the lever 8 pivoted on the pin 9. The mandril 10 is
fixed to the end of the lever 8 being carried in the clutch 11. A sliding collar 12
operated by a lever 14 pivoted at 15 to a bar 16 secured to the frame 1 depresses
the end of the lever 8 which is normally extended by the spring 13.
The action is as follows:--The metal tube having formed on it the bulge to be
expanded is set before the apparatus as shewn in Fig. 1 and the shaft 2, by means
of the lever, is moved forward so that the rotating mandril 10 is pushed into
the hole formed in the apex of the bulge or lump in the tube, (see Fig. 2). The
handle of the lever 14 is pulled over to the right thereby forcing the ring 12
over the raised end of the lever 8 which is depressed and the mandril revolves
eccentrically as shown in Fig. 3, and so expands the metal lump to the form of a
cylindrical opening, and union.

page_text: Having now particularly described and ascertained the nature and object of the
said invention, and in what manner the same is to be performed, we declare that
what we claim is:
(1) The general construction, arrangement, and combination of parts constitut-
ing the improved apparatus as and for the purpose herein described, and sub-
stantially as illustrated by Fig. 1 of the annexed drawings.
(2) The cylinder 6 carrying the lever 8 chuck 11 and mandril 10 the operating
ring 12 and spring 13 all in combination as and for the purpose herein described
and substantially as illustrated by Figs. 2 and 3 of the annexed drawings.
Dated the 11th day of Nawanshay 1900
FRIEDRICH SCHILLING,
JOHANN SCHURZ.
By their Agents,
Brierley & Howard,
Penny Bank Chambers, Halifax.