Ball Toothed Driving Gear.
Year: 1898

page_text: Date of Application, 19th Oct., 1898-Accepted, 3rd Dec., 1898
Ball Toothed Driving Gear.
I, OTTO SEHRWALD, of No. 28A, Marien Strasse, St. Pauli, Hamburg, in the
Empire of Germany, Merchant, 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 aud by the following statement:--
The object of this invention is an arrangement of gearing whereby the friction
developed in ordinary toothed gearing is reduced to a minimum. This is effected
by the use of loose balls fitted between fixed wheel teeth or spherical cavities or
sockets in the wheels.
The accompanying drawings show several examples of the manner of carrying
this invention into practice and of utilizing the same.
Figures 1 to 4 illustrate the use of spherical teeth for front wheels.
Upon the shaft a are arranged the sockets b, b1, which receive the balls c. One
of these sockets b¹ is rendered adjustable and is secured in position by means of a
counter nut b². At one point the balls bear against a tooth c of the socket so
that the former may not be able to roll therein. The balls are arranged in two
rows and are supported by a toothed ring d having the form of a double cone and
loosely surrounding the shaft a. Between each four balls gear, as shown in
Figs. 3 and 4, the teeth of the gear wheel e fixed to the second shaft f. As
soon as the latter turns the balls are carried away with the sockets b, b¹, mounted
on the driven shaft a. The balls turn and roll in such a manner that very little
friction is developed against the sides of the teeth.
Instead of two rows of balls, one row may be deemed sufficient, the teeth of
tho gear wheel surrounding them like a fork.
When the rows of balls have no need of being tightly arranged one upon the
other, the teeth of the wheel e may, as shown in Figure 5, be arranged on both
sides of a plate. The sockets b, 61, for the balls may be likewise provided with
teeth as shown in Figure 6.
In Figure 7.is shown the application of the invention to bevel wheels. In this
case two balls c, c, of different sizes are used so that a bevel wheel can be treated
in exactly the same manner as in Figure 1. The toothed wheel e¹ must obviously
have likewise a conical shape.
i
Figures 8 and 9 show an arrangement of teeth for star wheels a crank arm
being fixed on one of the shafts h, in order to carry the sockets b, b. The latter
are furnished with teeth c¹ so that the conical ring may be free to turn round. In
this ring engages, outside, a fixed wheel & and, inside, the toothed wheel / mounted on
the second spindle g. When for instance the spindle his rotated, the wheel formed
of the balls c turns within and transmits motion to the shaft g. Obviously could
be fixed and be connected with the second spindle.
Such toothed wheels may be used for all mechanical purposes but are more
particularly intended for velocipedes.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
Wheel gearing in which the driving teeth are formed or replaced by loose balls
held in spherical cavities or sockets.
Dated this 18th day of October 1808
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow,
Agents for the Applicant.