Year: 1889

page_text: Date of Application, 2nd Feb., 1889
Specification Accepted, 2nd Mar., 1889
I, CARL AUGUST JOHANSSON, Flemminggatan 27, Stockholm, in the Kingdom of
Sweden, Mechanician, 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 step-bearings and is illustrated in the accompanying
drawing which shows a vertical section of such a step bearing.
In carrying the said invention into practice the bearing A carrios a shaft B to the
end of which is secured by means of a key D, or in any other suitable manner, a
socket or cup C in such a manner that the said socket or cup partakes of the rotation
of the shaft B. In the outer end of the shaft A is arranged a removable stud or
pivot E. The inside of the socket ( is shaped as shown in the drawing, in order
that a sphere H may be arranged to bear against the said stud or pivot E.
The inner diameter of the socket is somewhat larger than the diameter of the sphero
and the depth of the cavity in the said socket should be less than the diameter of tho
sphere as shown in the drawing so that the said sphere projects beyond the said socket.
The shaft B is thus supported by means of the stud or pivot E and the sphere H, which
in turn is supported by a bolt I, arranged in a cross piece. The said bolt is screwed
into the cross piece and is provided with a jam-nut, so that the same can be removed
at pleasure.
The friction between the stud or pivot E the bolt I and the sphere is here a rolling
friction because the centre of the sphere is not situated in the centre-line of the shaft B
and the bolt I but a little to one side in proportion to the same. The stud or pivot E
of the shaft B reposes thus only against one point of the sphere H. If the surrounding
cup or socket C did not exist the result would be, that the sphere disposed obliquely
to the centre line of the shaft by means of the rotation of the shaft would be rolled
further from the centre line and thus removed from its place. Besides this purpose,
the cup or socket serves also to rotate the sphere, when the same by the rotation of
the shaft is brought outwards so far that it touches the innerside of the said cup or
socket.

page_text: The sphere His thus slightly pressed against the inner side of the cup or socket C
during the time that the shaft sind or pivot tends to rotate or roll the sphere.
As the machine, in which the stud-bearing is placed always shakes, the sphere will
by this reason rotate a little, in an irregular manner and in various directions and rolls
between the studs or pivots, so that their point of contact with the stud always vary.
Vibrations of the machine also prevent the sphere from resting in such a position that
its centre is situated in the centre line of the shaft.
If, as shown on the drawing, the edge of the cup is bent or directed slightly inwards
a quantity of water or oil can be held against the innerside of the cup when the shaft
rotates quickly and this quantity of fluid contributes to diminish the friction between
the sphere and the cup nind to fubricate the surface of the sphere.
Having now particularly described and ascertained the nature of the aid invention,
and in what manner the same is to be performed, I declare that what I claim is :—
A step bearing for shafts, in which the end of the shaft B is supported by a sphere
resting against a fixed holt I which is surrounded by a socket or cup fastened to the
end of the shaft and rotating with the same, the inner diameter of the said cup being
somewhat larger than the sphere as above specified.
11.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.