发明名称 Rollers with plural detents
摘要 A word forming device for use in teaching and related applications including a plurality of juxtaposed rotatable wheels, each having on a peripheral surface thereof the characters of the alphabet. The wheels rotate about a common axis and are provided with novel detent means permitting rows of characters to be aligned to form a word or words appearing beneath an elongated opening in a casing. The casing has a larger opening in a rearwardly facing surface thereof to permit manual manipulation of each of the wheels.
申请公布号 US4026043(A) 申请公布日期 1977.05.31
申请号 US19760700725 申请日期 1976.06.28
申请人 CARUSO, ANDREW 发明人 CARUSO, ANDREW
分类号 G09B1/20;(IPC1-7):G09B1/20 主分类号 G09B1/20
代理机构 代理人
主权项
地址