Abstract: Some embodiments are directed to a machine tool holding device for clamping a piece to be clamped that includes a contact surface. The holding device includes at least one claw intended to come into contact with the contact surface of the piece to be clamped. The claw includes a plurality of clamping plates stacked on each other, and each including on their edge a clamping surface arranged to be in contact with a portion of the contact surface of the piece to be clamped.

Abstract: Some embodiments are directed to a machine tool holding device for clamping a piece to be clamped that includes a contact surface. The holding device includes at least one claw intended to come into contact with the contact surface of the piece to be clamped. The claw includes a plurality of clamping plates stacked on each other, and each including on their edge a clamping surface arranged to be in contact with a portion of the contact surface of the piece to be clamped.

Abstract: A diaphragm system to center and hold at least one inner body within an outer body, which inner body and outer body extend in a first direction, has a plurality of washers positioned between an inner surface of the outer body and has a recess or aperture for receiving each of the inner bodies. The washers have an outer circumference provided with a surface contact portion for engaging an inner surface of the outer body, and each of the recesses has a surface contact portion for engaging an outer surface of the inner body with the contact portion for engaging the outer body and the contact portion for engaging each of the inner bodies having an angular extent up to 180°. The washers are mounted at different angular orientations perpendicular to the first direction regarding their contact portions, so that pressure is applied uniformly around each of the inner bodies.

Abstract: The presentation and storage folder (10) allows filing of transparencies in a normal binder (1) and in addition allows projecting these on an overhead projector (2) without detaching these from their binder. The folder is composed of at least three leaves the first of which (11) allows to file it in a classical binder, the last (13) being composed of the transparency or of a transparent pocket which can contain the transparency proper whereas the leaf or leaves in between (12) allow to unfold the folder and place the transparency on the glass of an overhead projector without needing to detach the folder from the binder.

Abstract: The presentation and storage folder (10) allows filing of transparencies in a normal binder (1) and in addition allows projecting these on an overhead projector (2) without detaching these from their binder. The folder is composed of at least three leaves the first of which (11) allows to file it in a classical binder, the last (13) being composed of the transparency or of a transparent pocket which can contain the transparency proper whereas the leaf or leaves in between (12) allow to unfold the folder and place the transparency on the glass of an overhead projector without needing to detach the folder from the binder.