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US 4,368,381 AGranted
Numeral adding toy
AssigneeKabushiki Kaisha Gakushu Kenkyusha (Gakken Co., Ltd.)
InventorShozo Ishiyama
Life of this patent
Estimating the term…
Abstract
A numeral adding toy including an arrangement for rotationally indexing in a cooperative manner two rotary wheels displaying numerals to be added and a single rotary wheel displaying the added sum answer by means of a rotationally indexing mechanism including pins or ratchets. The wheel displaying the added answer is rotated the summed number of indexes of the two wheels displaying the numerals to be added. The wheels, having been rotationally indexed, are rotationally returned by means of a releasing mechanism.
Claims15
A numeral adding toy comprising:
- a casing;
- at least two first rotary wheels supported in said casing and having their outer circumferences displaying numerals to be added;
- a second wheel rotatably supported in said casing and having its outer circumference displaying a numeral indicative of an added answer;
- a plurality of engagement elements each mounted on one side of each of said first and second rotary wheels concentrically with said rotary wheels;
- means having push clicks made engageable with said engagement elements of the respective rotary wheels for rotationally indexing said second rotary wheel and one of said two first rotary wheels in a simultaneous manner;
- springs for biasing said respective rotary wheels in their returning directions;
- stop clicks retaining said engagement elements of said respective rotary wheels for regulating the rotational returns of said respective rotary wheels;
- and
- means for releasing the retaining states between said stop clicks and said engagement elements.
6 more elements
Dependencies are inferred from the claim text.