English to French Tech/Engineering Mechanics / Mech Engineering security transfer arrangements

The shutter means may be a rolling shutter and in particular may be of a closely slatted construction to provide flexibility together with security from penetration. Such a shutter may encircle the chamber to be displaceable round it for selectively unblocking the openings into the chamber one at a time. Just one aperture may be provided though the shutter for alignment with the openings in provided access to the chamber. In this respect the shutter may be displaceable between a first position in which the aperture is in register with a first of the openings to enable access therethrough to the chamber while the shutter blocks the second opening, and a second position in which the aperture is in register with the said second opening to enable access to the chamber through the second opening while the first opening is blocked. There may be a third position of the shutter means in which both openings are blocked by it and the aperture is in register with a window through which the contents of the chamber can be inspected.