Radiant energy – Invisible radiant energy responsive electric signalling – Ultraviolet light responsive means
Patent
1989-03-08
1990-10-16
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Ultraviolet light responsive means
340600, G01J 144
Patent
active
049629107
ABSTRACT:
In a device for use to prevent skin from sunburns according to the present invention, critical values concerning sunburns corresponding to a plurality of Sun Protection Factor values are displayed upon inputting of a user's skin-type data. Accumulative ultraviolet-radiation doses as measured over predetermined time intervals are compared with the critical values concerning sunburns corresponding to the above mentioned Sun Protection Factor values. Alarm sounds are activated calling the user's attention to prevent his or her skin from sunburns, every time each of the critical values coincides with the measured radiation doses.
REFERENCES:
patent: 3917948 (1975-11-01), Strutz
patent: 4428050 (1984-01-01), Pellegrino et al.
patent: 4535244 (1985-08-01), Burnham
patent: 4644165 (1987-02-01), Ross et al.
patent: 4704535 (1987-11-01), Leber et al.
patent: 4851686 (1989-07-01), Pearson
Casio Computer Co. Ltd.
Fields Carolyn E.
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