Improvements in Fitting Driving Pulleys to Tubular Shafts, and in Coupling or Uniting Tubing, Shafting, and Analogous Articles.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Fitting Driving Pulleys to Tubular Shafts, and in
Coupling or Uniting Tubing, Shafting, and Analogous Articles.
I, RICHARD EUGEN PAPENDIOK, of Offenbach on the Main, in the Empire of
Germany, Engineer, do hereby declare the nature of my said invention and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement:—
My invention relates to a new method of fitting driving pulleys to tubular
shafts, and in coupling or uniting parts of machinery by means of tubes expanded or
wedged in position; and its object is to supersede the ordinary method of brazing as
now practised for such purposes.
And in order that my said invention may be particularly described and ascertained
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is an end view, and Fig. 2 a longitudinal section, showing one method of
carrying out my invention. Figs. 3 and 5 are end views, and Figs. 4 and 6 are
longitudinal sections, showing other methods of carrying out my invention.
Referring to Figs. 1 and 2, a is a ring or casting such as the boss of a pulley. bis
a tube (or tubular shaft) to which the ring a is required to be united. c is a split
ring, eccentrically bored, and d is a wedge, which is driven in between the split
portions of the ring c, whereby it and the tube (or shaft) b are expanded together, and
the tube or shaft is caused to fit the ring a forcibly. The wedge d may be further
secured in position by a pin e, but this pin may be dispensed with. In Figs. 3 and 4
the inner ring is shown split in two, the edges being inclined from c¹ to c¹, whereby
the two parts can be driven towards each other longitudinally, thus expanding the
tube or shaft b, or two tubes or shafts bb in the ring or boss a. A pin or pins e e may
be used to secure the position of the split ring c.
In Figs. 5 and 6 the expansion of the tube 6 is effected by the two segments ff,
which are inserted in the tube b. g is a screw having a square boss, with a pin
head entering the segment f, and a screw thread tapped into the segment 1;
whereby the segments may be forced asunder with the aid of a spanner applied to the
screw g.
It is obvious that various modifications may be made in the relative thickness of
the metal and the method of inserting and driving the wedges and screws.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. The improved method of fitting driving pulleys to tubular shafts, by means of an
inner expanding ring or tube c, or by segments ff, substantially as herein before
described, and illustrated by the drawings.
2. The improved method of coupling and uniting tubes or tubular shafts bb, by
means of an inner expanding ring or tube c, or by segments ff in combination
with rings or bosses a, substantially as hereinbefore described and illustrated by
the drawings.
3. The improvements in fitting driving pulleys to shafts and in coupling or uniting
tubing, shafting, and analogous articles substantially as herein before described and
illustrated by the drawings.
Datad this 6th da
1000
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent for the Applicant.