Playtoy building block set

Details Playtoy building block set Playtoy building block set

1979-09-12

1981-03-03

Peshock, Robert

Stock material or miscellaneous articles

Composite

Of bituminous or tarry residue

46 17, 16128B, 16171, 428 33, A63H 3306

Patent

active

042532680

ABSTRACT:
A play building block toy set has flat plate elements of semi-elastic plastic material that interlock with pressure inserted ball socket joints. The flat plates may have various geometric shapes such as triangles, squares, etc. with each side the same length and having identical mating ball and joint locking elements. Along each block side mid-spaced between the center and two corners are respectively a ball and a socket. The ball is placed in a semi-circular cutout and is fastened by a stem to the plate. The socket is formed with a skull cap type cutout and rim members that elastically receive and hold the ball when forced or twisted thereinto. To achieve an insertion angle of 270.degree., the ball center and the socket center are on the bottom plane of the plate. The socket has two thickened rims extending below the plate. Means are provided for mounting shafts through holes in the plates.

REFERENCES:
patent: 2709318 (1955-05-01), Benjamin
patent: 2776521 (1957-01-01), Zimmerman
patent: 2885822 (1959-05-01), Onanian
patent: 3477167 (1969-11-01), Ach
patent: 3636589 (1972-01-01), Jacobsen
patent: 3881274 (1975-05-01), Kanda
patent: 4099887 (1978-07-01), Mackenroth

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