Year: 1888

page_text: I RUDOLF HORNSTEINER of Zizkov, Prague in the Kingdom of Bohemia,
Manufacturer, do hereby declare the nature of my said invention 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 the construction of certain fast and loose pulleys described
in the Specification of Letters Patent dated 26th November 1887, No. 16,286;
and the object of my present invention is to effect further improvements in such
pulleys.
And in order that my said Invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is a side elevation, partly in section. Fig. 2 is an end elevation, also partly
in section; and Fig. 3 is a section on the line x, x, of Fig. 2.
Referring to Figs. 2 and 3, L is the loose pulley. V is the fast pulley. A is the
ordinary fork for shifting the band S from one pulley to the other. The periphery of
the loose pulley L is formed as shewn in my said former Specification, and as also
shewn in Figs. 2 and 3, the outer flange l being uniformly raised all round, and the
near flange 2 being reduced, as shewn, to assist the transference of the band from
one to the other of the pulleys.
72
The fast pulley V is formed with two annular grooves v₁ v²; the groove v² being
the driving groove. The groove is of the same diameter and sectional form as
that of the loose pulley L.-
The near flange a of the fast pulley is cut away or reduced at one or more portions
of its circumference, as shewn, from 6 to 62 in Fig. 1; the motion being in the
direction of the arrow.
When the rope or band S is moved from the loose pulley L towards the groove v
of the fast pulley, the reduced portion of the flange, from 61 to 63, greatly facilitates
its movement, and it readily slips over the same into the groove of the fast
pulley V. The tension of driving ropes not being great, and the open form of the
groove being somewhat favorable to a certain amount of slipping, the driven

page_text: machinery is brought gradually into motion. After the vis inertiae has been partially
overcome, the rope is transferred to the driving groove v², which has the ordinary
form for affording the full amount of grip.
In some cases where the load and power are light, I make use of ordinary driving
pulleys and adapt the same to my system, by rivetting or otherwise attaching to
the periphery one or more small plate or plates, as shewn by dotted lines at m n,
in Fig. 1.
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. The method of facilitating the transference of driving bands to and from fast
and loose pulleys, by means of an additional groove v¹ acting intermediately between
the loose pulley and the driving groove v² of the fast pulley, substantially as herein-
before described and illustrated by the drawings.
2. The method of adapting ordinary pullies to my improved system by means of
plates m n rivetted or otherwise attached thereto, substantially as hereinbefore
described, and illustrated by the drawings.
3. The general construction, combination and arrangement of the several and
respective parts, together forming my improvements in rope gearing, substantially as
hereinbefore described and illustrated by the drawings.
T
1 Q
1
1900
GEO. DOWNING,
Agent for Applicant