Improvements in Roller Skates.
Year: 1896

page_text: Date of Application, 18th June, 1896-Accepted, 18th July, 1896
Improvements in Roller Skates.
I, JULIUS BUTTERMILCH of 216 Friedrichstrasse, Berlin 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 ascertained
in and by the following statement :-
The present invention relates especially to an improvement in those roller
skates in which two rollers are fixed one behind the other in the centre line of the
skate.
In Figure 1 of the accompanying drawings, the improved roller skate is shown
in side elevation view;
Figures 2, 3, 4, 6 and 7 illustrate the application of the roller holder or fork to
the foot plate;
Figures 2, 3 and 4 show the application of an elastic pad between the roller
holder and the foot plate (not shown in Figures 6 and 7);
Figures 5 and 8 serve together with Figure 4 to illustrate the front roller-
holder which is fastened to. a vertical pivot fixed to the foot plate so as to have a
free lateral movement thereon, this rotation or lateral movement round the pivot
being limited by means of stops ;
Figures 3 and 9 show a cross section of the roller arrangement, indiarubber
being used in the former as material for the tyre, whereas Figure 9 shows the
attachment of a roller tyre made of felt or leather;
Figure 9 shows a side elevation of Figure 9.
The foot plate a Figure 1 is attached to the sole and heel of the boot by means
of a screwed bolt f, and a movable lever or clamp arrangement consisting of
several parts d d' de, and carries at its front and rear ends, brackets, forks or
roller holder 6 and respectively. As the rear holder is not revoluble when an
elastic pad 1, Figure 2, of indiarubber, felt or leather is used, the said pad can be
fixed between the foot plate a and the support and the latter be held by means
of bolts i to the foot plate a, so that the upper surface of the support / can yield
on all sides to the pressure exerted upon the roller. In the case of the front
holder b, however, where an elastic pad or cushion k is used, Figures 3 and 4, the
under surface of the pad is covered by a metal plate and this and the pad k
fastened movably by bolts i to the foot plate a. A pivot r, Figure 3, which is
fastened to the foot plate a and passes through the pad k as well as right through
the above mentioned plate ³, carries, at its lower end and against the movable
plate 3, the roller holder or support b. For the purpose of limiting the movement
round the pivot, the holder b has a stop n Figures 4 and 8 on each of its two sides
and the plate 2 has upon each of its two sides two stops m so fixed that the
support with the stop n can only move around the pivot r (Figure 3) to the
right or left to the extent permitted by the stops m m Figure 5. Now in order
to set the front holder to a given movement for figure or practised skaters or to
fix it immovably straight for novices or beginners the roller holder 6 Figure 7,
is secured to the plate 2 as well as the foot plate a by means of screws y' which
are passed through holes y Figures 3 and 6. The rollers c, g have each an elastic
tyre which is fastened upon a hub s, Figures 3 and 9, this hub s is provided in its
centre with an oil chamber r so that the balls held in the hub by means of the
inwardly movable half-bearings t can be continually fed with the oil contained in
the said chamber v. As shown in Figure 3 the half-bearings t can be provided

page_text: with a cap p to engage over the end of the hubs and thereby prevent dust
penetrating into the ball bearing as well as into the oil chamber of the hub s.
The elastic tyre of the roller c, g is as shown in Figure 3 made of indiarubber
and placed over the V-shaped groove in the hub s. The tyre of the roller e g
represented in Figure 9 however, can be made of felt or leather placed over the
smooth hub s and fixed firmly thereon by means of bolts w passing through discs w.
This fastening could be effected by a Hange on one side of the hub s, only one
disc being then necessary on the opposite side.
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-
1. In roller skates the arrangement of a front roller holder (b) revoluble round
a pivot (r) attached vertically to the foot plate (a) and whose movement is limited
by stops (mn m), said holder being adapted to be fixed rigidly by pins or
screws (y) substantially as described.
2. In roller skates the arrangement of an elastic pad (l, k) between the roller
holders (bh) and the foot plate (a) substantially as described.
3. In roller skates the arrangement of a hub s with an inner oil chamber (6)
surrounding the axle and with an outer V-shaped groove for receiving an elastic
tyre of india rubber, the inwardly movable half bearings for the balls (t) being
adapted to receive caps (p) to engage the neck of the hub (s) substantially as
described.
4. In roller skates the arrangement of a roller tyre (cg) made of felt or leather
: in such a manner that the same is held upon the hub (s) by means of two dises (w)
and bolts (w) running through them, substantially as described.
5. The construction and combination of parts taken as a whole forming the
improved roller skates, substantially as described and illustrated.
Dated this 17th day of June 1896.
W. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.