(57) The sections are provided with continuous longitudinal shaped portions effective
to snap lock one or more lugs (3), provided with a projecting edge and formed at one
end of a leg, forming a portion of a hinge (46), a clutch for a hung window, a closing
ratchet (47) for vasistas windows, cooperating, as fittings, with the sections themselves.
The fittings moreover comprise: a bracket member (23) for assembling the frame and
movable wings; a compass (48) for vasistas windows of the reversible type (right and
left), the structural elements whereof are mutually coupled by a simple restrained
joint type of coupling-(without screws or pins)- and are effective to be slidingly
coupled to the frame or wing uprights; a cremone or the liketype of handle (35) comprising
means effective to allow for the handle to be automatically affixed on a frame section.
The basic sections of the set are moreover provided with two shaped longitudinal parallel
seats effective to respectively house the closing rod (8), for the sliding of the
latter, and one of the end of the rod itself for locking it at the fixed frame.
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