Improvements in Roller-skates.
Year: 1892

page_text: Date of Application, 26th Mar., 1892-Accepted, 7th May, 1892
CABLE LIM
Improvements in Roller-skates.
I, FRIEDRICH FRANKENBERG of 221, Prenzlauer Allee, Berlin, Kingdom of
Prussia, Germau Empire, Technicist do hereby declare the nature of this inven-
ion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
My invention relates to a roller-skate having four wheels placed in a longitudinal
plane, in distinction from the usual construction of roller-skates, where two wheels
are placed beside each other.
My invention also consists in providing a lubricating device of such construction,
that the lubricating material is kept within the frame of the skate, thus avoiding
any possibility of occasioning spots on the clothing by contact with the drops of
outflowing oil or other lubricating material.
My invention will be more readily understood by reference to the accompanying
sheet of drawings, on which:
Fig. 1 is a side elevation of my improved roller-skate,
Fig. 2 is an upper view of the same, and
Fig. 3 is a partial sectional elevation, showing one of the wheels with the bearing
of its axle and box for lubricating the same.
Similar letters denote similar parts throughout the different figures.
My improved roller-skate consists first of two parts A A forming the frame, in
which the bearings for the wheels are provided. The parts A are secured one to
another by means of screw-bolts B and corresponding nuts C. At three places
the parts A are bent outwardly, as will be seen in Fig. 2, whereby a space is
provided in which the wheels D may rotate. These wheels have their edge
rounded as shewn on Fig. 2, and are also bored at several places E in order to
reduce their weight. The axles F of these wheels are supported in bearings G
provided in the parts A, but the ends of the axles F do not protrude exteriorly,
but are inclosed within the box H. This box is in its upper part filled with wad
or any other material capable of soaking oil etc. & provided with a small hole 1,
preferably of conical shape, said hole being made for the application of oil or any
other lubricating material. The wheels D may be all of equal diameter, but the
two inner wheels, which are placed rather close to each other, have their bearings
provided in a lower plane than the two outer wheels. Thus when both inner wheels
touch the ground, the outer wheels are not in contact with the same.
To the parts A of the frame I secure in usual manner uprights J and to these
the plates K and I respectively, for supporting the foot of the skater, a screw M
being provided at the rear end of the skate in order to move the clamp grasping the
heel. This part of the device is however not different from the usual construction
of skates, and I do not claim the same as my invention.
The novel features of my roller skate are first the arrangement of the wheels D
in the longitudinal axis of the skate, the inner wheels being placed close to each
other and their axles in a plane below that in which the axles of two outer wheels
are placed. By this construction and by making the edge of the wheels rounded,
the description of curves is greatly facilitated.
Secondly the arrangement of the end of the axles F within a closed box H.;
I thereby prevent completely any escape of the lubricating material from the skate,
which escape was very annoying in the usual construction of roller-skates by often
occasioning spots on the clothes of the skaters. I may also mention that the skate
may be easily taken to pieces in order to clean or to repair the same, as the parts of
the frame are only connected by means of screw-bolts and nuts.

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
1. In a roller skate: The combination, with a frame consisting of two parts A
secured to each other by means of screw-bolts B and nuts C, of the four wheels D
arranged in the longitudinal axis of the skate, the two immer wheels being placed
close to each other, and their axles in a lower plane than those of the outer wheels,
and the edge of the wheels D being rounded, for the purpose as described.
2. In a roller-skate: The wheels D, the axles F whereof are journaled in
bearings G, the end of the axles being inclosed within a box H provided at its top
with a hole I, substantially and for the purpose as described.
Dated this 24th day of March 1892.
FRIEDRICH FRANKENBERG,
By Robert Deissler,
38, Alexander Strasse, Berlin, C., Germany, Agent for the Applicant.