公开(公告)号：EP1261960B1

公开(公告)日：2006-01-04

申请号：EP01909993.6

申请日：2001-03-07

申请人： Direct Educational Services Limited

发明人： WALKER, Roger ,  HISKETT, Graham

IPC分类号： G09B19/02

CPC分类号： G09B19/02 ,  G09B1/20

摘要： A teaching aid comprises a frame (1), a plurality of elongate rods (2) mounted horizontally in the frame and spaced vertically from each other and a plurality of polyhedral blocks (3) rotatably mounted on each rod. Means are provided to releasably hold each block (3) in at least three discrete rotary positions on its respective rod (2).

公开(公告)号：EP1261960A1

公开(公告)日：2002-12-04

申请号：EP01909993.6

申请日：2001-03-07

申请人： Direct Educational Services Limited

发明人： WALKER, Roger ,  HISKETT, Graham

IPC分类号： G09B19/02

CPC分类号： G09B19/02 ,  G09B1/20

摘要： A teaching aid comprises a frame (1), a plurality of elongate rods (2) mounted horizontally in the frame and spaced vertically from each other and a plurality of polyhedral blocks (3) rotatably mounted on each rod. Means are provided to releasably hold each block (3) in at least three discrete rotary positions on its respective rod (2).