Improved Appliance for Supporting Belts when Removed from Pullies, and for Placing the Belts upon the said Pullies.
Year: 1891

page_text: Date of Application, 12th Feb., 1891
Complete Specification Left, 11th Nov., 1891-Accepted, 12th Dec., 1891
PROVISIONAL SPECIFICATION.
Improved Appliance for Supporting Belts when Removed from
Pullies, and for Placing the Belts upon the said Pullies.
I, ERNST HAMMESFAHR, of No. 7 Foche, Solingen, Prussia, in the German
Empire, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention has mainly for its object to prevent the catching of pulley belts
upon the bearings or other projections of shafting when the belt has slipped off the
pulley, whether intentionally or not, and also to prevent the friction and wear of
the belt when lying upon the rotating shafting. For these purposes I place upon
the shaft on either side of the pulley a loose sleeve with concave outer surface, and
of such a length that when the belt slips off the pulley to either side, its loop is
securely supported upon the concave surface of one of these sleeves, and is thus
prevented from coming in contact with the shafting or projections thereon, the
interior of the sleeves being in frictional contact with the shaft.
The sleeves are prevented from shifting on the shaft by collars secured on the
latter; they may either be of tubular form, or they may be formed as open loops,
sprung on to the shaft, or they may be built up of separate sections.
There may
be combined with such sleeves an arm for placing the belt upon the
pulley again. This arm may either be of bridge shape, passing across the pulley
and connecting the two sleeves together, or it may be a single arm only connected
to the one sleeve. The latter may be provided with a balance weight so as to
balance the arm and hold it either in a horizontal, vertical or inclined position
between the two sides of the belt, according as this passes off horizontally, vertically
or at an angle. For placing the strap upon the pulley with this device, the
following side of the belt is placed over the end of the arm and the leading side is
pulled tight against the side of the arm and over the sleeve so as to cause this to
revolve with the shaft and cause the arm in revolving with it, to lay the belt over
the pulley.
Dated this 19th day of February 1891
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Appliance for Supporting Belts when Removed from
Pullies, and for Placing the Belts upon the said Pullies.
I, ERNST HAMMESFAHR, of No. 7 Foche, Solingen, Prussia, in the German
Empire, Manufacturer, 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 :-
My invention relates mainly to an appliance for catching and for replacing belts
that fall or are thrown off from fast or loose pullies, and it has for its object
to prevent such belts from becoming entangled with the shafting or with the
collars or bearings &c. thereof, as also to prevent them from coming in frictional
contact with the shafting or the rims, arms, or bosses of the pulley.
The appliance consequently affords new means for preserving the belts from
wear as also for preventing disturbances and danger in working, and it is
distinguished by its simplicity and inexpensive construction and its easy mounting
and working.

page_text: The appliance consists of one or two guard sleeves placed loose upon the shaft,
and which may either be closed all round, or be open on one side, which sleeves are
of sufficient width to effectually catch the belt as it falls off the pulley.
These guard sleeves are formed somewhat concave in the longitudinal direction,
so that the belt will lie safely in the hollow thus formed, and is not liable to slide
off the ends of the sleeve.
The guard sleeves are generally made of such a weight that they are not carried
round by the rotation of the shaft, nor does any rotation take place when they are
loaded with the belt, the shaft being made to revolve with friction within the
sleeve, instead of running with frictional contact against the belt as usual.
On the accompanying drawing are shewn by way of example several arrange-
ments of such guard sleeves.
Fig. 1. shews a front view of a pulley with two such closed guard sleeves a,
Fig. 2. shews an end view;
to
Fig. 6. shews an arrangement with two open guard sleeves b.
These guard sleeves may be employed either with or without the arms
which reference will presently be made; the sleeve at the right hand side of the
pulley is shewn without the arm.
The sleeves are situated close against the boss c of the pulley d and are usually
prevented from shifting longitudinally either by collars f secured on the shaft e or
by other suitable means.
The guard sleeves can be constructed of a single piece, or they may be made of
two or more pieces secured together by screws or otherwise as shewя in cross and
part longitudinal section at Fig. 1. The sleeves can also be adapted for placing
the belt upon the pulley; for this purpose they are connected together by a looped
arm g, passing round the pulley, as shewn at Figs. 1, 2, 3 and 6. These figures
shew the arrangement of the parts for belts that pass in a downward inclined
direction; the looped arm g in this case hangs vertically downwards by its weight,
in the space between the two sides of the belt.
If now the belt is to be placed from the guard sleeve upon the pulley, the one
part of the belt is brought over the square loop of the army as at Fig. 1, and then
by giving a strong pull at the other side of the belt, the sleeve a is pressed with
sufficient frictional contact against the shaft to cause the former, together with its
arm g to be carried round by the shaft, whereby the belt will be carried up by
the arm 9 and placed thereby upon the pulley as indicated by dotted lines at
Fig. 14.
With horizontal or slightly inclined belts the looped arm 9 must be held in a
corresponding horizontal or inclined position, for which purpose a suitable counter-
weight is provided on the sleeve such for example as shewn at h Fig. 4.
Instead of effecting the rotation of the sleeve and arm by the frictional contact
with the shaft as described, this may also be effected by hand or by other suitable
means.
The guard sleeve, as also the arm 9 may be made single instead of double, in
cases where the position of the pulley requires it, as indicated at Fig. 5.
The horizontal loops of the arms g may be made with a bend, or with projections
at the ends, as shewn at Fig. 2A and Fig. 3, in order to hold the belt securely on the
arm when being raised thereby.
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. The use for pullies of guard sleeves such as a or b, placed loose upon the
shaft, which serve to catch the belt when falling or thrown off, and thus prevent
the frictional contact of the belt with the shaft or parts of the pulley, substantially
as described.
2. The combination of closed or open guard sleeves such as are referred to in
the preceding claim, with an arm 9 with or without counterweight h, by means of

page_text: which arm the belt can be placed from the sleeve on to the pulley, substantially as
described.
3. Placing belts upon pullies by leading the one side of the belt, while carried
by a loose sleeve a on the shaft, upon an arm g connected to the sleeve, and then
exerting a pull on the other side of the belt, so that the frictional contact produced
between the shaft and sleeve will cause the latter together with the arm to be
carried round so as to cause the latter to place the belt upon the pulley, substantially
as described.
Dated this 11th day of November 1891
ABEL & IMRAY,
Agents for the Applicant.