Improvements in elements for building mechanical constructions for use as toys or educational appliances

摘要

138,824. Graham, J. Aug. 21, 1919. Mechanical constructions, details for building up.-In order to save metal, the interchangeable strip elements 1 for building toy structures are made very narrow, as shown, for the greater part of their length, but have enlargements 3 at intervals for the bolt-holes 4. Some of the strips 'may have the enlargement at the ends bent up at right-angles to the main portion as shown in Fig. 3, for use as struts, or a strip may be folded on itself for use as a clip. Specification 125,890