Reflector dish

A reflector dish according to any one of the preceding claims, in which the second elongate member (4) may be mounted above the hypothetical cone of radiation reflected from the reflective surface.

A reflector dish according to any one of the preceding claims, in which the receiver support (2) includes more than one first and second elongate member (6,4).

A reflector dish according to any one of the preceding claims, in which the, or one where there are more than one, of the first elongate members (6) is positioned to be approximately vertical when the dish is vertical.

A reflector dish according to any one of the preceding claims, in which the first elongate member (6), or members, of the receiver support is in the form of a truss or a hollow, box-like structure.

A reflector dish according to any one of the preceding claims, in which the reflective surface support (26) includes a plurality of trusses.

A reflector dish according to any one of the preceding claims, in which trusses are provided, the trusses comprising a top and a bottom chord (8,10).

A reflector dish according to any one of the preceding claims, in which the receiver support (2) extends through the reflective surface.

A reflector dish according to any one of the preceding claims, in which the reflective surface is removed or omitted in the areas below the receiver support (2).

A reflector dish according to any one of the preceding claims, in which, where any part of the first elongate member (4) is positioned above the reflective surface of the dish, that the part is as close as possible to the reflective surface to minimise interception of radiation reflected therefrom.

A reflector dish according to any one of the preceding claims, in which the support means (34) provided on or close to the central axis of the dish comprises a single support member (36), two concentric tubes (36,52), a plurality of separate members or a ring.

A reflector dish according to any one of the preceding claims, in which the support means provided on or close to the central axis of the dish comprises a ring formed from the inner cross-members of the trusses (28) forming the reflective surface support (26), with plates attached to the ring to which the first elongate member (6) of the receiver support (2) is attached.

A reflector dish according to any one of the preceding claims, in which the reflective surface support (26) is supported by a first member, the receiver support may be supported by a second member, the two members being commonly supported.

A reflector dish according to any one of the preceding claims, in which the support means (34) are stiff, and formed from load bearing material to minimise displacements of the receiver.

A reflector dish according to any one of the preceding claims, in which the receiver support is arranged to displace slightly to ensure the receiver remains in the focal region.