Toy construction elements connectible by projections in recesses

摘要: A TOY CONSTRUCTION ELEMENT HAVING ROW OF PROJECTIONS ON THE TOP SIDE AND CORRESPONDING RECESSES BOTTOM SIDE, BORE THROUGH EACH PROJECTION COAXIAL RECESS, DEFINES PAIR TRUNCATED CONES JOINED AT THEIR MUTUAL SMALLER DIAMETER. BETWEEN ADJACENT IS AN AUXILIARY APERTURE ITS OPENING FORMED AS ONE SAID RECESSES. TWO ELEMENTS ARE JOINABLE EITHER BY INSERTION INTO RECESS ANOTHER, OR PLACING CONNECTION CONICAL ENDS IN BORES STRUCTURAL ELEMENTS.