Improvements in Brakes for Revolving Shafts Exposed to Axial Pressure.
Year: 1885

page_text: Improvements in Brakes for Revolving Shafts Exposed to
Axial Pressure.
I, REINHOLD LÜDERS, Merchant, of Berlin, Germany, do hereby declare the
nature of said invention for IMPROVEMENTS IN BRAKES FOR REVOLVING SHAFTS
EXPOSED TO AXIAL PRESSURE, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:-
This novelty relates to an arrangement of brake discs for revolving shafts,
exposed to axial pressure and has for its purpose the insertion and suspension of
any number of resistances, which act against the rotary power of the shaft.
In the annexed drawing Fig. 1 is a vertical longitudinal section and Fig. 2 a
vertical cross section.
On the shaft a are mounted, so as to be movable in the direction of the axis, any
number of discs b¹ 6 of any convenient size, said discs being compelled by
the feathers b to share the rotation of the axle. Between any two of these discs
a loose disc f¹. fa (friction disc) is placed on the nave of the fast disc.
The disc ', which may, if desired, be rigidly fastened on the axle a, transmits
the entire pressure of the axle to the friction disc f¹, which again imparts it to b
and so on to be, which latter is adapted to serve as a pivot or foot step and to
transmit the pressure in the known manner to the stationary step-bearing.
One of the friction discs, for instance f¹, being held fast by means of any known
mechanism, such as a ratchet-pawl, brake band or eccentric, as indicated by Fig. 2,
while the axle a continues to revolve with all other parts, the two faces of the
arrested friction disc produce or encounter two frictional resistances on the
contiguous faces of the nearest fast discs b¹ and 6. Each frictional resistance is
proportional to the product of the respective axial pressure, and the mean distance
of the sliding surfaces from the revolving shaft a. These frictional resistances act
against the turning power and retard or stop the motion of the axle a.
By bolding fast or releasing the required number of friction discs f, any desired
number of frictional resistances are inserted or suspended and thus the rotation of
the axle a may be retarded or stopped with more or less force.
The following are the advantages of this construction:
1.) The use of small friction surfaces, for obtaining a given effect.
2 The use of any num
of friction surfaces aido ko cida

page_text: 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
In brakes for shafts, exposed to axial pressure:
The combination with a revolving shaft a and its bearing, of discs b¹..... bu
adapted to turn with the shaft, loose friction discs f¹....f-¹ mounted between
the fast discs b'... bn in such a manner that the axial pressure is transmitted to
the fixed bearing through the whole series of fast and loose discs, and mechanism
for stopping one or more of the loose discs so as to produce by means of the axial
pressure frictional resistances adapted to retard or stop the rotation of the axle a.