Improvements in Adjustable Fastening Devices for Driving Belts.
Year: 1899

page_text: Improvements in Adjustable Fastening Devices for Driving Belts.
I, AUGUSTO MUSCIACCO, of 74, Rue Maestra, Brindisi, in the Kingdom of Italy,
Gentleman, 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:
The object of this contrivance is to join the ends of belting, to give it the
requisite tension.
This tensioning can be done without removing the contrivance from its place,
or removing the belting from the corresponding pulleys, and may be accom-
plished easily and quickly.
By reason of the saving in belting and gearing effected by this contrivance
it is indispensable in all cases which it is desired to use the same belting on
spare pulleys of various diameters. It is exceedingly useful whenever there
is a fixed constant strain upon the belting.
The construction of the belt tensioner, both as regards its dimensions and
strength, is regulated by the width of the belt to which it is applied, and the
force which the belt has to transmit, the same may be said of the key, the length
of which is proportioned to the strain to be borne.
Referring to the drawing Fig. 1 gives a side view of the tensioner with the
jack screw arrangement, the beam M not being quite screwed down; Fig. 2 a
section on line QR, the beam M. being completely raised. Fig. 3 is a plan.
Fig. 4 is a section on the line S T, and Fig. 5 a section on the line Û V.
Fig. 6 shows the key for turning the rollers on which the belt ends are fastened.
Like letters represent like parts.
A A are plates made of steel or other metal, parallel and forming a trapezium.
B B are horizontal parallel cylinders crossing the space between the plates; at
their extremity they have each a ratchet wheel C C the pawls D D of both of
which are provided with a spring E, the ratchet wheels have a square opening F
to take the key used for turning the cylinders which are placed in the space
between the plates; their length being equal to the width of the belting their
sides are sloped, and the belting is cut so as to fit upon them exactly, this being
facilitated by the screws G G which fix the belting upon the cylinders by means
Jan II

page_text: or
A top beam I is fixed to the plates A and it has in its centre a female screw
through which passes the pressure screw L. This screw, when raised
lowered, lifts up or lets down another movable beam M guided by properly
adjusted guides running in grooves made in the plates.
Around the horizontal rods or rollers N N fixed to the lower part of the plates,
in the space between these two pivots (which may not be less than twice the
thickness of the belting) are placed the two ends of the belting before they are
fixed to the cylinders and the parts N N revolve for the purpose of facilitating
the movement of the belting at the moment when the tension upon the belting
begins to take place, and the two keyed cylinders continue their rotation.
Part Orig. 2 of the belting is placed over one pulley N the other part P
Fig. 2 over the other pulley N, and whilst the belting rotates, the tensioner
rotates with it.
After putting the belting in its place and tensioning it by means of the
cylinders, the screw L must be turned so as to let down the movable beam M
between the two belt parts and make it press tightly against these. The beam
will thus fill up the space between the bands and relieve the ratchet wheels
of a part of the strain, and it is in order to further increase this resistance that
the beam M bears the notches shown on the design.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the same is to be performed, I declare that what
I claim is:-
1. A contrivance for joining the ends of belting by which the available length
of the belting may be modified without cutting comprising a holder with organs
of tension, means for attaching the belt ends to said organs of tension, and a
gripping device for the tension belt.
2. In a belt tensioning device the combination of the plates A A rods N N
cylinders B B means for rotating the cylinders B B and for attaching belt ends
thereto, and a beam M movable upon the belt where its parts cross the rods N N
and means for forcing the beam M tightly upon the belt for the purpose set
forth.
Total +1... 021 L
С T
1000
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, W.C., London.