Improvements in or relating to Conical Step-toothed Wheels.
Year: 1897

page_text: Date of Application, 17th Dec., 1897-Accepted, 5th Feb., 1898
COMPLETE SPECIFICATION.
Improvements in or relating to Conical Step-toothed Wheels.
I, CARL WENIGMANN, of Herderstrasse 6, Cologne-Lindenthal, in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement;-
This invention relates to improvements in the production of conical step toothed
wheels which can be used for making wheels with two, three or more ranges of
steps to the teeth.
These improvements have for their purpose the production of a solid and strong
wheel out of parts previously so arranged that their teeth can be cut or planed
through the group of parts.
In order to allow of thus cutting bevelled toothed wheels, that is to say, the
teeth of such wheels, these wheels are divided into several parts, such as a, b, c
Fig. 1, lying on one another and corresponding with the number of steps required.
The teeth a, b, c, of these parts a, b, c standing in rows behind one another, are
cut through as a single tooth a, b, c'; Fig. 2.
In this
After the teeth are produced in this manner, the parts (in a wheel with three
steps, three parts, Fig. 1.) are rotarily displaced in such a manner to one another
that the teeth a', b, c have the arrangement indicated in Fig. 2 with A. Bindi-
cates the position of the teeth after displacement in wheels of two steps.
position, according to this invention when applied to wheels with flat faced disks
for their bodies, as in Fig. 1, the parts are rigidly held by passing bolts d (Fig. 1.)
through holes drilled to fit such bolts in order to secure the parts into a solid and
unalterable whole. The single parts may also be fixed together by means of
wedges, keys, or tapered bolts similarly fitted into holes to fit them.
Where, as in bevelled geared cycles, a sufficiently solid and strong wheel having
also the necessary lightness is not so easily. made by bolting together flat disked
wheels as in Fig. 1, and where also it is necessary to have screw-threads in the boss
of the wheel for its adjustment or otherwise, I make at least one of the parts with
an extended nave or sleeve e on or about which the other part or parts lie, the
whole being bolted, or fastened by screws or the like together as in Fig. 3, or I
may make such parts each with an extended nave, box, or sleeve e, e¹, the innermost
being of the smallest diameter and the other or others larger or successively larger
to fit each on the one within it, as shown for instance also in Fig. 3, and bolt or
fasten by screws or the like the parts together for instance through said naves,
boxes or sleeves.
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) Bevelled step toothed wheels formed of annular parts adapted to be placed
together and temporarily held while the teeth are simultaneously cut or planed
through all the parts, such parts being then placed in their relative permanent
TDi Q77

page_text: positions and rigidly and unalterably secured together by bolts, wedges, keys or
the like passing through holes to fit the same through the various parts substantially
as set forth.
2) Bevelled step toothed wheels formed of annular parts whereof the inner part
has an extended nave forming a sleeve for the other part or parts and means for
securing said parts together.
3) Bevelled step toothed wheels formed of annular parts each having an extended
nave, sleeve or box adapted to fit each around the extended nave, sleeve or box next
within it and means for securing the parts together.
Dated this 17th dor of December 1897
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, London, W.C.