Improvements in Bearings for Rotary Discs, Wheels and the like,
Year: 1898

page_text: Date of Application, 19th Feb., 1898-Accepted, 26th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in Bearings for Rotary Discs, Wheels and the like,
I, HERMANN GANSWINDT, of Mariendorfer Weg, Schoeneberg, near Berlin,
Manufacturer, 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:-
This invention relates to a peculiar kind of bearing for rotary discs, wheels and
the like, its object being to limit, without the employment of antifriction balls or
rollers, the friction arising from the movement of the discs, wheels and the like to
the lowest degree in such manner that the axle, on which the disc or wheel rotates,
is rigidly connected at its ends with supports so that it is only subjected to shearing
and not to flexure.
With the great shearing strength, for instance, of string wire made from crucible
cast steel, even an axle of very small diameter is adapted to receive heavily loaded
discs and wheels. Owing to the small diameter of the axle, the friction is
extraordinarily reduced and a very light and non-resisting rotary movement is
attained.
Practical experiments have shown that an iron disc of about 88 kilogrammes in
weight and mounted upon pianoforte string steel wire of 4 millimetres in diameter
rotates longer at an initial velocity of about 120 revolutions per minute than upon
the best ball bearings, whereas on mounting the same disc on wires of 2 & 1 milli-
metres respectively in diameter, the period of rotation increases to about the double
and four-fold respectively and even on the arrangement being roughly constructed
without lubricator.
This invention is adapted to dispense with all the known disadvantages experienced
with ball bearings, such as caused by the varying diameter or irregular wearing and
tearing of the balls or rollers.
Referring to the accompanying drawing:
Fig. 1 is a sectional view of the construction of the bearing of a rotary wheel,
Fig. 2 is a modification of the construction shown in Fig. 1,
Fig. 3 is a sectional view of a further modification adapted for cycle wheels.
The disc, wheel or any other rotary body a to be mounted is keyed or otherwise
firmly secured with its hub to a sleeve b preferably made of chilled or tempered steel.
This sleeve b has a central boring for receiving the wire c which forms the axle the
ends of such wire being firmly secured in supporting arms d by means of nuts or in
any other suitable manner.
In consequence of the small cross section of the wire which possesses great shearing
strength and is made of the best crucible cast steel or the like, the friction between the
sleeve b and the wire is very slight and the movement of the disc a or other body is
effected with the least possible resistance.
In order that the "dangerous cross section," where the wire c is subjected to shearing
viz.: at the end of the sleeve b, may be guarded in such manner that in case of the
wire breaking for instance in consequence of a jerk or the like, the rotating body with
its hub or sleeve b is maintained in position, sleeves or blocks e are secured in the
supporting arins or brackets d by means of nuts f provided with borings or holes

page_text: through which the ends of the wire c pass in order to receive the nuts (not shown)
by which the wire is secured.
The sleeves or blocks e are provided with bell shaped projections e¹ extending
beyond the ends of the sleeve b without however coming in contact therewith.
According to the modification of Fig. 2 the "dangerous cross section " coinciding
with the ends of the sleeves b are situated in the central axes of the supporting arms
or brackets d in order that the wire shaft will not be subjected to any flexure
whate.ver.
Fig. 3 is a sectional view of a modification specially adapted for cycle wheels; in
this case the sleeve b¹ through which the wire shaft c passes forms the hub of the
wheel and the supports or brackets d¹ are provided with borings or recesses forming
bell shaped casings d² for the ends of such sleeves so that the same is secured in like
manner as described in respect of the foregoing modifications.
If for some reason the wire c, upon which the disc, wheel or other body with the
sleeve 6 or 6¹ rotates should break, the sleeves e or brackets ¹ with their bell shaped
parts el or casings d² respectively sustain the end of the sleeve 6 or 61 and keep the rotary
body in position.
The bell shaped parts e¹ may also be arranged on the sleeve b or they can be
dispensed with on employment of a wire of sufficient shearing strength.
Having now particularly described and ascertained the nature of the said
invention and in what manner the saine is to be performed, I declare that what
I claim is
An improved bearing for rotary discs, wheels and the like consisting of a sleeve or
hub firmly connected with the disc or wheel and threaded on a wire shaft of small
sectional area the ends of which are firmly secured to sleeves or blocks mounted in
fixed brackets the ends of the sleeve or hub of the rotary body being surrounded by
bell shaped casings of the blocks or supports of the wire shaft, substantially as
described and shown in the drawing.
Dated this 10th day of Wabuu1000