Improvements in Reversible Rope Driving Gear for Revolving Shafts.
Year: 1889

page_text: Date of Application, 13th Nov., 1889-Accepted, 28th Dec., 1889
COMPIUTE STFULFICATION.
Improvements in Reversible Rope Driving Gear for Revolving
Shafts.
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 :-
The object of my invention is to effect improvements in the method of driving
and reversing the motion of revolving shafts, driven by rope, gut, cord or cable,
commonly called and hereinafter referred to as driving bands.
In carrying out my invention I make use of an endless driving band, so mounted
that it passes, in contrary directions, round fast and loose pulleys fitted to the shaft:
other pulleys being also fitted for keeping the band taut, and for other purposes.
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 view, transverse to the shaft, and Figs. 2 and 3 are side views, of my
improved reversing gear, arranged for two different speeds.
Figs. 4, 5, and 6 are similar views, arranged for driving at equal speeds.
Figs. 7 to 10 illustrate another arrangement of my invention.
Figs. 11 and 12 illustrate an arrangement with reversible clutches.
Referring to Figs. 1, 2 and 3, za is the shaft. M and m are two pulleys fast on
the shaft r.
The relative diameters of these pulleys may be varied as shown or made
equal, as required, and may be made separate or cast in one. N and are loose
pulleys corresponding with the pulleys M and m. A a are the reversing forks fitted
to rods Tt. These rods are actuated by pins gg, working in curved slots uv, formed
in the reciprocating plate e, attached to the rod f. W and Z are two transmission
pulleys, which may be used as tension or driving pulleys, or otherwise, and so
arranged as to carry the driving band in line with the pulley N and m or M and n
respectively.
Referring to Figs. 4, 5 and 6, M is a fast pulley and N and N are loose pulleys.
In this arrangement one fast pulley (M) only is used, the band being shifted on to
M and N, as shown in Figs. 5 and 6, or on to M and N. The forks A and a may
be actuated by a grooved plate, as shown in Fig. 1, or by a grooved cylinder c.
Referring to Figs. 7, 8, 9 and 10, the fast pulley M is shown placed between two
loose pulleys N and N. These loose pulleys N and N are formed with double grooves,
whereby the band is capable of being shifted on to M and N', to drive in one direction,
as shown in Fig. 8; also on to M and N, to drive in an opposite direction as shown
in Fig. 10; or on to N and N', to bring the pulley M and shaft to a state of rest, as
shown in Fig. 9.
Figs. 11 and 12 illustrate the modification of my invention, in which the reversal
of motion is effected by means of clutches formed upon the sleeves F and P of the
pulleys N and N', and upon the central sleeve respectively. The sleeve Q is
fitted to slide upon a feather fitted to the shaft and is capable of being moved
into gear with either For P, as required, whereby one or the other of N or N¹
becomes the driving pulley of the shaft a. Any other form of coupling apparatus
may be substituted for that shown in Fig. 12, such apparatus or gear forming no
part of my invention.
It is obvious that the relative diameters of the pulleys, the number of grooves and
other arrrangements and details may be very much varied.

page_text: 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 improved driving band gear for alternately reversing the direction of
motion of revolving shafts, by means of endless bands, in combination with trans-
mission pulleys W and Z, substantially as hereinbefore described and illustrated by
the drawings.
2. In the construction of driving band gear as aforesaid, the combination of two
pairs of pulleys N M and n m arranged in pairs of equal diameters, one of each pair being
fast and the other loose, substantially as hereinbefore described, and illustrated by
Figs. 1, 2 and 3 of the drawings.
3. In the construction of driving band gear as aforesaid, the combination and
arrangement of three pulleys of similar diameter, the central pulley being fast on
the shaft, and the others loose, and each loose pulley being formed with one or
two rounded grooves, for imparting contrary motions at equal speeds, substantially
as hereinbefore described and illustrated in Figs. 1 to 10 of the drawings.
4. In the construction of driving band gear as aforesaid, the combination and
arrangement of two loose pulleys N and N' so fitted as to be alternately coupled with
the shaft by means of a suitable coupling sleeve, substantially as hereinbefore described
and illustrated by the drawings.
5. The general constructions combinations and arrangements of the several and
respective parts together constituting my improvements in reversible driving band
gear for revolving shafts, substantially as hereinbefore described and illustrated by the
drawings.
Dated 12th November 1oo.
GEO. DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.