(57) A lock for aluminium framed sliding panels comprises dividable members of a lock
head (1) and a connecting screw (2) onto the functional member of the lock.
The lock head is externally cylindrical with an internal square recess (1a) receiving
the connecting screw.
The screw is of special manufacture, with a square head (2a), with a member (4) that
passes through the head via a corresponding aperture through the internal recess.
The member of the special screw has suitable length for fitting of the lock head with
the functional member of the lock and regulation of locking tolerances. A suitable
spring (3) is additionally fitted that ensures smooth retrograding of the lock head,
thereby averting any wear or damage thereof due to involuntary violent collision onto
the collaborating pin of the lock receiving member when the sliding panel closes.
The effectiveness of the system in the safety and in the averting of wear or damages
in combination with the simple manufacture provides easy installation and regulation,
but also possibility of application in all new and older aluminium profile series,
as element of new structures or of replacements of older defective systems of locking
of framed panels.
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