Flat handcraft construction element with slot and opposed tabs

Details Flat handcraft construction element with slot and opposed tabs Flat handcraft construction element with slot and opposed tabs

1989-11-09

1990-12-11

Hafer, Robert A.

Amusement devices: toys

Foldable, collapsible, or having pivoted portion

Sheet material folded to form object

446388, 446 80, 273157R, A63H 3300, A63H 308, A63H 3316, A63F 910

Patent

active

049766520

ABSTRACT:
A handcraft construction element comprising a substantially square central engagement portion defining a diagonal slit therethrough and two oppositely disposed triangular integral flaps extending on opposite sides of said engagement portion and separated therefrom by integral hinges, wherein each of said flaps defines an extended tongue adapted to engage said diagonal slit of another such element; and a sheet having a plurality of handcraft construction elements pre-cut for punching out.

REFERENCES:
patent: 1465284 (1923-08-01), Osenkowski
patent: 1880130 (1932-09-01), Goldbach
patent: 1890269 (1932-12-01), Swanson
patent: 1997856 (1935-04-01), Cather et al.
patent: 2075259 (1937-03-01), Battjes
patent: 2108451 (1938-02-01), Selezneff
patent: 3234682 (1966-02-01), Frankl
patent: 3562077 (1971-02-01), Raba
patent: 3666607 (1972-05-01), Weissman
patent: 4454678 (1984-06-01), Duvivier
patent: 4874341 (1989-10-01), Ziegler
Mathematical Models, Cundy & Rollett, 2nd Ed., Oxford University Press, 1961.
One Piece of Paper Grater, Mills, & Boon Ltd., London, 1963 NB 1270 P3G7.
Fun With Paper Folding, Murray & Rigney, Revel Co., 1952 LB 1542 M8 e.2.
A Japanese Paper Folding Classic, Brossman & Brossman, Fontana Lithographers, Washington, D.C., 1961 TT 870 A3.

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