Improvements in or relating to Brakes for Rotatory Bodies.
Year: 1899

page_text: Date of Application, 1st Apr., 1899-Accepted, 19th Aug.,
1899
COMPLETE SPECIFICATION.
Improvements in or relating to Brakes for Rotatory Bodies.
We, WILHELM MAASSEN, Proprietor of Weaving Works, at Jagerstrasse 4,
of'Aix-la-Chapelle, and WILHELM WIRTZ, of Schaufenberg, both in the Empire of
Germany, Machinist, 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:―
The present invention relates to a brake for fly wheels or other rotatory bodies
and comprises an eccentric device, preferably two eccentrics arranged at the
circumference of the wheel or rotatory body diametrically opposite each other,
each eccentric haying mounted on its circumference an eccentric ring, which,
after the release of a catch or locking device holding this ring, from any part
of the apparatus, is so turned by means of a spring or springs or weight or
equivalent, that it comes in contact with the periphery of the fly wheel wedging
the same, in the quickest possible manner, between the two eccentric devices and
stopping it almost instantaneously without shock, the rings on account of their
eccentricity producing the braking power, and then, in consequence of the
increasing pressure due to the rotation of the wheel involving in their rotary
movement, through friction, the eccentric discs.
In the accompanying drawing
Figure 1 is a front view, and
Figure 2 a side view of the brake device at the moment of action, and
Figure 3 is a side view of the eccentric and eccentric rings.
When the engine or rotatory part is at work, the edges of the eccentric rings a
are situate at a slight distance from the periphery of the wheel.
If now from any cause it is required to stop the working of the machine from
any point b, it is effected by closing say an electric contact at b, whereby an
electro-magnet c is actuated. The latter then raises the armature d which is
provided with extensions, forks or catches i, which extensions normally lock or
hold the eccentric ring in its out of action position, where it is out of contact
with and therefore does not rotate with the wheel. The catches having been
withdrawn by the armature and the projections e on the eccentric rings a becom-
ing free, the eccentric rings will be partly rotated by a spring or springs f
acting on them to that effect, until they come in contact with the wheel rim,
upon which they will exert a braking action on account of their eccentricity,
and, on the pressure increasing, the eccentrics g will also be involved in the
rotation, in consequence of which the wheel will become wedged between the
devices and stopped without shock. To release the wheel from the brake, the
eccentric discs may be turned backwards by means of hand wheels h, the eccen-
tric rings being thus withdrawn from the wheels and their projections e again
engaged with the catches i, the springs f being again set thereby.
66
In order, to prevent the springs from unwinding, after being wound up or
set," in consequence of this turning of the eccentric discs g, a ratchet wheel m
is arranged on the axis k, and a pawl 7 on the frame, so as to prevent the rota-
tion of the axle in the other direction, in well known manner.
In order to avoid

page_text: breaking of or damage to the eccentric shafts, the latter are mounted on strong
spring bearings f¹.
It is obvious that other means than electrical, can be employed to effect the
release of the eccentric rings, although the electric device is
very suitable.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is;
-
1. A brake device for rotatory bodies comprising two eccentrics such as g
arranged diametrically opposite to each other about the circumference of the
rotatory body, each eccentric being provided with an eccentric ring such as a
which will automatically turn when released from a locking device in any suit-
able manner, the rings being actuated by spring power or weights, whereupon
the rings come in contact with the periphery of the part to be braked, thereby
causing the eccentrics to turn; substantially as described.
2. A brake device' for rotatory bodies substantially as described or illustrated
in the accompanying drawings.