Abstract: The constructional element defines between the public and an officer isolated in another premises a transparent partition structure which, however allows oral communication and exchanges of objects or documents between the two sides of the element. This element comprises a counter surmounted by a wall of transparent material which makes with respect to a transverse horizontal plane of the counter an angle which is less than a right angle on the public side of the element. The element comprises two spaced apart lateral posts contained in vertical planes and having elongated upper parts supporting the transverse wall and wider lower parts providing a suitable supporting polygonal structure for the element. The upper part of the counter and the lower wall are maintained between the lower parts of the posts.

Abstract: The protected counter window comprises a frame incorporated in a partition wall separating the dispensary from the public. There is a peep hole and a transfer and exchange opening in the window. The window has a trough which is pivotally mounted in the transfer opening and is capable of pivoting alternately to the official's side or to the public side without breaking the physical seal of the protected counter window.The latter is applicable to any premises requiring high safety during exchanges between the official and the public.