Abstract: A HUD for a helmet having an image projector attached to a body and configured to project images. The HUD has a projection optical combiner configured to produce a transparent display of the images. A holder supports the combiner outside the helmet such that the images are visible to a user of the helmet when the head-up display is in use. A forward facing part of the combiner, such as the entire combiner or its forward facing portion, is user replaceable. A system that has the HUD and a spare user replaceable forward facing part and a system having the HUD and the helmet are additionally disclosed.

Abstract: The invention relates to a telephone and its desk top holder. The holder has three projections (7, 8) functioning as support points, and the lower end of the telephone has cavities correspond to them. A telephone placed in the holder will be kept in its place supported by the support points. Telephones of different forms can be placed in the same holder, provided that they have cavities corresponding to the projections of the holder.

Abstract: A device to be used with a mobile station, comprising a body to be attached e.g. to a belt with an attachment plate and a fastener attached to the mobile station with a fitting piece. The body includes control flanges bent inward from two opposite sides and from below to guide the fastener which comprises a neck and a wider end consisting of a flange placed behind the guide flanges. The body also includes a projection or a similar structure acting against a spring force, resisting the upward movement of the fastener when said fastener is in the locked position.