IMPROVEMENTS IN OR APPLICABLE TO CRUTCHES HEELS OF BOOTS AND SIMILAR SUPPORTS
Year: 1884

page_text: I GEORGE NICOLAUS THURZO of Vienna Austria IV Ressel gasse 2 Engineer <do
hereby declare the nature of my Invention for IMPROVEMENTS IN OR APPLICABLE
TO CRUTCHES HEELS OF BOOTS AND SIMILAR SUPPORTS 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 rotary caps or tips for crutches, wooden legs, heels for
boots and shoes and other objects and is represented in the accompanying drawing.
A cap A is fixed to the end of the part which is to be made rotary for instance a
wooden leg.
The bottom a of the tube A is provided with a projection b which fills out the
boring in the bottom a of the rotary cap B.
The upper part A is so connected to the lower part B by means of the plate or
disc m and the screws n n that the same can freely rotate-In order to prevent
any dirt or other foreign substance penetrating between the surfaces a a¹ the surface a
is so constructed that the same passes or fits over the periphery of the other.
The cavity in the cap or tip B is provided with furrows or grooves r to receive a
piece of india rubber C which can be readily renewed.
The parts A B can also be connected in other manner for instance by means of a
bolt running through the centre.
As this device can be applied not only to crutches and wooden legs but also. for
stilt like objects, gymnastical apparatus, sticks and the heels of boots and shoes it
is evident that the cap can be formed so as to correspond to the purpose to which it
is to be applied.
Fig. 2 and 3 represent the heel to a boot or shoe-The bottom a of the upper
part is curved to the rear; the piece of india rubber is in both cases inserted in
the rotary cap or tip B. The 'connection of the parts a B in Fig. 2 is the same as
shown in Fig. 1.
The plate m in Fig. 3 is provided with 2 projections or studs h h one of which
is provided with a threaded boring to receive the screw 8-The bottom to the
upper part a is as shown at e bent upwards so as to form a small projection
against which the screw 8 leans.

page_text: As that part of the screw to the rear of the threaded part is conically formed the
parts a and b are drawn together by screwing in the screw 8 so that an adjustment
is rendered possible-In this manner the rotation of the lower part B on the upper
part a which is screwed to the heel of the boot or other object, is assured.
A suitably formed piece of leather can be employed in place of the piece of
india rubber C-In this case the part B consists only of the disc or part a¹ into
which a piece of leather is screwed; by means of this arrangement walking or
other operation is not only facilitated in a remarkable degree but the unequal
wearing away of the sole C is rendered impossible, as the cap B revolves in walking
so that all parts of the cap are submitted to like wear and tear-The screw 8 can
also be so arranged that the same fulfills the functions of a trousers protector.
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
A revolving cap or capsule or tip for crutches, wooden legs, stilts, gymnastic
apparatus, the heels of boots and shoes and other similar objects consisting of the
rotary lower part, B to which the piece of india rubber or leather C is fixed,
consisting of the revolving disc or plate a¹ and the fixed part A (Fig. 1) or a Fig. 2
and 3 whereby the lower part a¹ is rotarily attached to the upper part by means of
one or more screws n or by means of the plate or discs m with the projections h h
and the conical screw a substantially as described and shown in the accompanying
drawings.