(57) Devices (4) suitable for electrically opening a door (13) or a window, for example,
which pivots in a frame (1). The device (4) comprises a longitudinally adjustable
element (15), which is to be pivotally connected to the frame (1) with one end (16)
and which is to be pivotally connected to the door (13) or the window with the other
end (18). The longitudinally adjustable element (15) comprises a rod (41) which can
be telescoped out of a housing by means of an electric motor (42). The longitudinally
adjustable element (15) can also be manually adjusted for length against spring force.
The device may comprise an elongated section (17) present between parallel posts (2)
of the frame (1), to which section (17) one end (16) of an electrically operated moving
mechanism (15) is attached, whilst the other end (18) of said mechanism (15) is attached
to the door (13) or the window. The section (17) is provided, at least at one end,
with a clamping mechanism (19) comprising four hemispherical elements (26,29,31,32),
which are arranged in opposite pairs, with the convex sides being turned towards each
other, whereby movement of the elements of a first pair towards each other will cause
the elements of the second pair to move away from each other.
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