[0001] The present invention refers to a kits device for the moving means to get current
from a fixed contact wire particularly to be used with low-tension current, said kits
device without operation brush discharge. Making reference to the current feed systems
for trucks in motion, for which it is necessary to provide means of said type, according
to the prior art different solutions are known, as for instance the expensive electrificated
bar called "bus trolley" which uses opportunely insulated contacts. Then it is known
the cheaper but cumbersome solution called "to festoon" which uses an adequate extension
cable to be carried away by the mobile truck. In the art the picking us difficulties
of the current are known by moving outlet means mounted on trucks which necessary
must have wiping or rotating contacts. Currently a solution is used which provides
a wiping contact, called to charcoal, with the natural problem of the wear of the
working parts with the consequent turn up of the brush discharge which causes together
with the friction the heating of the parts in contact and substantial hydraulic loss.
To reduce said irregular wear of the parts a solution provides a rolling contact replacing
the charcoal with a small wheel. However also this solution does not complete resolve
the problem such as said problem is only moved earlier in the chain of the wire parts,
infact the wheel must always transmit the current to the motor line cord which inevitably
stays fixed in comparison with the same wheel so creating however a wiping contact.
The present invention has the object to principally obviate the said problems creating
a new outlet rotating means able to be connected to the motion line cord without a
wiping contact, at least in the conventional use, however able to reduce to a minimum
the brush discharge and the heating. These and other objects are reached by the invented
means that is characterized to be essently formed in a first operative way to a wheel-shaped
contact into which a magnet is placed to be in support attraction with a second magnet
on which is wired the motor line cord so that the wiping contact was "in head" between
the magnetic parts, parts themself not very wearing out and not mechanically constrained
by a clamping spring as it happened in the pass. In a second embodiment, which better
solves the problem, while the contact with the power line is always wheel-shaped,
the connection with the motor line cord is actuated by a ferrule on which the line
cord is wired, bathed into a basin with mercury, said basin obtained inside the wheel,
so that the wear of the parts will be practically null, the current conduction perfect
and consequently without brush discharge. These and other features will be better
apparent from the following execution form of the invented means showing by way of
not limiting example. With reference to the enclosed drawings in sheet 1 fig. 1 is
view of the invented contact of the first embodiment providing a "magnetic version"
as to be mounted on a truck of the same type as described and claimed in the Italian
Patent Application number B099A 00390 of the same applicant. In sheet 2 fig. 2 showed
the magnetic contact in exploded view. In sheet 3 fig. 3 showed the invented contact
in second version "to mercury". In sheet 4 fig. 4 is exploded view of the mercury
contact. Making reference to said drawings are to be noted the rotating contact 1,
the concave outline groove 1', the fixed convex conductor 2 opportunately isolated
in part 2' laterally mounted on left and right rail 3 on which is moved with its bearing
wheels the not showed track, the rolling-contact bearing 4, the contact magnets 5,
the lower one integral with the wheel 1 by the screw 7 while the upper one integral
with the isolating body 7 by the grain 8, the room 9 for the wiring of the line cord
which feeds the motor. In sheet 3 are to be noted the rotating contact 10, the groove
10', the conductive liquid 11 for example mercury contained inside a hollow of the
wheel 10 to be realized in conduction material like the parts 12 of the device, while
the parts 13 are in isolated material, a second rolling-contact bearing 14 that permits
to a ferrule 15 also it in conduction material to remain immobile in comparison with
the line cord 16' wired in point 16 which feeds the motor while the mercury 11 rotating
without brush discharge around the ferrule 12 together with the contact 10 conducts
perfectly current. In the use all the execution elements, the dimensions, the materials
and others of the invention are to be provided in different way without exit form
the present invention. Infact the invented means so created can be modified without
exit from the invented device. Moreover all the parts are to be replaced with others
techinically similar.
