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US 9,852,654 B2Granted
Learning aid
AssigneeJohn Exton
InventorsJohn Exton, George Kotsiopoulos
Life of this patent
Estimating the term…
Abstract
A learning aid including a series of symbols and movable portions. Each of the movable portions is associated with at least one of the symbols and is movable by hand from a first position to a second position to select the at least one of the symbols.
Claims16
A learning aid including:
- a series of symbols which convey at least the integer numbers from 1 to 9 inclusive;
- and
- an integral body of material, wherein:
- two or more portions of the integral body are movable;
- each of the movable portions is associated with at least one of the symbols and is movable by hand, independently of the other movable portions, from a first position to a second position to select, and so that the integral body stores, the at least one of the symbols;
- each of the movable portions is mounted to span a gap at least partly through which it is movable by hand from the first position to the second position;
- and
- each of the movable portions has a free length longer than the gap, at least partly through which it is movable, to form an over-centre arrangement separating the first position from the second position, such that a selected position of each movable portion is retained.
5 more elements
A learning aid including
- a series of symbols;
- and
- movable portions, wherein each of the movable portions:
- is associated with at least one of the symbols;
- is mounted to span a gap at least partly through which it is movable by hand, independently of the other movable portions, from a first position to a second position to select the at least one of the symbols;
- and
- has a free length longer than the gap, at least partly through which it is movable, to form an over-centre arrangement separating the first position from the second position, such that a selected position of each movable portion is retained.
4 more elements
Dependencies are inferred from the claim text.