Year: 1897

page_text: NAALUD.
I, SAMUEL LEOPOLD KINSBRUNER, of 5, Nürnbergerstrasse, Berlin, W., Painter, do
hereby declare the nature of this invention to be as follows:-
This invention relates to a roller skate, in which the weight of the body of the
skater is utilized for the propulsion of one or two running rollers in such a manner,
that the force given by the pressure of the weight of the body upon a base or
foot-plate hinged with the framing of the skate is transferred to the rollers of the
skate so that the velocity of the movement is essentially increased. The construction
is auch that with crank-propulsion serving for the transmission of power to the rollers,
the position of the dead point is easily overcome at each revolution, whilst simul-
taneously the raising of the hinged foot-plate is assisted in a manner favourable for
the motion by means of one or more springs inserted between the latter and the
framing of the skate.
In the annexed drawing is shown a form of construction of this skate.
The skate consists of a framing a, in which the rollers c and c¹ are journalled on
the axles b and 6'. On the upper side of the framing is hinged the foot-plate d, so
that it can be lifted and lowered by the foot which is to be fastened to it in a
suitable manner, for instance by straps.
Between the foot-plate d and the framing a is inserted a spring e, which
facilitates the raising of the plate d. From the foot-plate & there passes a crank-
rod f to the crank upon the axle g journalled in the framing a. The crank pin i
engages in an oval hole in the crank-rod. Upon the axle is a chain-wheel k
which is connected by the chain m with a second chain-wheel k¹ upon the axle b¹ of
the back roller c¹.
The device thus described operates in the following manner :-
The roller skates are fastened and used in a manner similar to simple skates, by
advancing alternatively the one foot and drawing the other behind, whereby the
movement of the hinged foot plate d is transferred to the back wheel connected
therewith and to the back-roller c'.
Fig. 1 shows the skate in the position in which the transmission of force from the
plated to the chain-wheel k by means of the crank-rod f and crank h is just
completed. By means of the progressive movement of the foot, the foot-plato dis
lifted, which movement is facilitated by the spring e. As soon as the plate d has
reached its highest point, it is moved again downwards in the direction of the
arrow (Fig. 2) on further moving forward, whereby the power effected by the
pressure of the human body upon the foot-plate d is transferred by means or
the crank gearing f h and the chain-wheel gearing m to the back roller c' and
the velocity of rotation of the latter is increased according to the proportions
of the gearing. This process is repeated at regular intervals.
In order to overcome easily the dead-point-position in the highest and lowest
positions of the crank and to avoid disturbance caused thereby, there is provided
the arrangenient by which the crank is discharged at the moment when it
CD

page_text: overpasses the dead point. This is effected, as shown in Figs. 3 to 5, by the
crank pin i being guided in an oval hole 1 of the crank-rod f.
For instance as soon as the crank h arrives nearly to its lower dead-point position
(Fig. 3), the pin i moves to the under side of the hole and hereby also the crank h
is discharged from the pressure of the rod f, so that the crank h can pass easily
from the position shown in Fig. 3 over the dead-point Fig. 4 to the position shown
in Fig. 5, so that equable transmission of movement is secured from the foot-plate d
to the roller c¹.
It results from this description, that in consequence of the connection of the
hinged foot-plate with one or both rollers the movement of the latter is never free
and unhindered, but, depends always upon the movement of the foot-plate regulated
at desire. One is thus able to regulate the movement of the roller skate and to
propel or stop the skate at will.
I, SAMUEL LEOPOLD KINSBRUNER, Painter, of Berlin, W, 5, Nürnbergerstrasse, in
the Empire of Germany, do hereby declare the nature of this invention and in 2
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to a roller skate, in which the weight of the body of the
skater is utilized for the propulsion of one or two running rollers in such a inanner,
that the force given by the pressure of the weight of the body upon a base or foot
plate hinged with the framing of the skate is transferred to the rollers of the skate
so that the velocity of the movement is essentially increased. The construction is
such that with crank propulsion serving for the transmission of power to the rollers,
the position of the dead point is easily overcome at each revolution, whilst
simultaneously the raising of the hinged foot plate is assisted in a manner favorable
for the motion by means of one or more springs inserted between the latter and the
framing of the skate.
In the drawing filed with my provisional specification is shown a form of con-
struction of this skate.
The skate consists of a framing a in which the rollers and c' are journalled on
the axles b and b'. On the upper side of the framing is hinged the foot plate d so
that it can be lifted and lowered by the foot which is to be fastened to it in a suitable
manner, for instance by straps. Between the foot plate d and the framing a is
inserted a spring e which facilitates the raising of the plate d. From the foot plate d
there passes a crank rod f to the crank h upon the axle g journalled in the framing a.
The crank pin engages in an oval hole in the crank rod f. Upon the axle g is a
chain wheel k which is connected by the chain m with a second chain wheel k upon
the axle b¹ of the back roller c¹.
The device thus described operates in the following manner :-
The roller skates are fastened and used in a manner similar to simple skates by
advancing alternatively the one foot and drawing the other behind, whereby the
movement of the hinged like foot plate d is transferred to the back wheel connected
therewith and to the back roller c'.
Fig. 1 shows the skate in the position in which the transmission of force from the

page_text: plate & to the chain wheel k by means of the crank rod and crank h is just completed.
By means of the progressive movement of the foot the foot plate d is lifted which
movement is facilitated by the spring e. As soon as the plate d has reached its
highest point, it is moved again downwards in the direction of the arrow (Fig. 2) on
further moving forward, whereby the power effected by the pressure of the human
body upon the foot plate d is transferred by means of the crank gearing fh and the
chain wheel gearing km k to the back roller c¹ and the velocity of rotation of the
latter is increased according to the proportion of the gearing. This process is
repeated at regular intervals.
In order to overcome easily the dead point position in the highest and lowest
positions of the crank hand to avoid disturbance caused thereby, there is provided
the arrangement by which the crank his discharged at the moment, when it
overpasses the dead point. This is effected, as shown in Figs. 3 to 5, by the crank
pin being guided in an oval hole of the crank rod f. For instance as soon as the
crank h arrives nearly to its lower dead point position (Fig. 3), the pin i moves to
the under side of the hole and hereby also the crank is discharged from the
pressure of the rod f, so that the crank h can pass easily from the position shown in
Fig. 3 over the dead point Fig. 4 to the position shown in Fig. 5 so that equable
transmission of movement is secured from the foot plate d to the roller c'.
It results from this description, that in consequence of the connection of the
hinged foot plate with one or both rollers the movement of the latter is never free
and unhindered, but depends always upon the movement of the foot plate
regulated at desire. One is thus able to regulate the movement of the roller skate
and to propel or stop the skate at will.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. An improved roller skate, in which the weight of the human body is used for
propelling the rollers and in which a foot plate & hinged on the framing of the
skate is connected by means of a crank gearing f h and a chain wheel gearing km k
with one or more rollers c c¹ for the purpose of propelling or stopping the skate at
pleasure.
2. A roller skate as in Claim 1 having one or more springs e, inserted between the
foot plated and the framing a of the skate for the purpose of facilitating the lifting
of the foot plate.
3. A roller skate as in Claim 1 or 2 in which the pin i of the crank h reaches into
an elongated hole in the crank rod f for the purpose of overcoming easily the dead
point position of the crank and of obtaining a regular transmission of movement from
the foot plate to the rollers.