COLOR MEMORY TOY
First Claim
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1. A color memory toy, comprising:
- a toy body having an outer surface; and
a quasi-reversible thermochromic coloring material applied to said surface and having a temperature hysteresis characteristic for changing between a first and second colored state, wherein said material changes from said first colored state to said second colored state completely at a upper temperature above a first temperature when said material is heated, maintains a present one of said first and second colored states within a two-color holding temperature range between said first temprature and a second temperature, and changes from said second colored state to said first colored state completely at a lower temperature below said second temperature when said material is cooled, wherein said two-color holding temperature range is within a range of ordinary temperature.
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Abstract
A color-changeable toy having a toy body to which a quasi-reversible thermochromic material is applied in a pattern. This material stably holds either of two colored states in a range of ordinary room temperatures. However, the material reversibly changes to one of the states above this range and to the other below this range. Thereby, by using commonly available heat and chilling sources such as ice, hot water or breath, one of the colors can be selected. A breath blow pipe can be used in conjunction with the toy and have an external appearance associated with that of the toy, e.g., gun and soldier.
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Citations
10 Claims
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1. A color memory toy, comprising:
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a toy body having an outer surface; and
a quasi-reversible thermochromic coloring material applied to said surface and having a temperature hysteresis characteristic for changing between a first and second colored state, wherein said material changes from said first colored state to said second colored state completely at a upper temperature above a first temperature when said material is heated, maintains a present one of said first and second colored states within a two-color holding temperature range between said first temprature and a second temperature, and changes from said second colored state to said first colored state completely at a lower temperature below said second temperature when said material is cooled, wherein said two-color holding temperature range is within a range of ordinary temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification