US PATENT SUBCLASS 126 / 688
.~.~ Spot focus

Current as of: June, 1999
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126 /   HD   STOVES AND FURNACES

569  DF  SOLAR HEAT COLLECTOR {18}
684  DF  .~ With concentrating reflector {5}
688.~.~ Spot focus {3}
689  DF  .~.~.~> Spherical
690  DF  .~.~.~> Parabolic
691  DF  .~.~.~> Elliptical

DEFINITION

Classification: 126/688

Spot focus:

(under subclass 684) Apparatus wherein the first surface is arranged to concentrate the solar radiation at a point. [figure]