专利名称：Apparatus for teaching numerical concepts发明人：Noriaki Iwao申请号：US05/842111申请日：19771014公开号：US04179825A公开日：19791225
摘要：A teaching apparatus for use in teaching numerical concepts can be constructedso as to utilize first and second display members which are movably mounted within ahousing so that each of the members is capable of being moved from a first position to aseries of successive positions. The housing is constructed so that as the display membersare so moved portions of them can be viewed from the exterior of the housing. Anadvancing structure is provided within the housing for concurrently moving the displaymembers from their first positions to the successive positions. First and second returnstructures are provided for causing the return of the display members to their firstlocations after they have been moved to any of the successive positions. A part may bemounted on the housing and connected to the advancing structure so that each time theadvancing structure is actuated the part is moved from and then back into an initialposition.
申请人：TOMY KOGYO CO INC
代理人：Edward D. O'Brian
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