Sun protection calculator and timer

Details Sun protection calculator and timer Sun protection calculator and timer

1993-10-26

1994-11-15

Dzierzynski, Paul M.

Radiant energy

Invisible radiant energy responsive electric signalling

Ultraviolet light responsive means

340600, G01J 100, G01J 142

Patent

active

053650689

ABSTRACT:
A portable device for calculating the optimal safe sun protection factor (SPF) lotion to be applied by the user under local ambient conditions. The user inputs their skin type (fair, medium, or dark), and the amount of time they wish to spend in the sun. The apparatus then calculates a corresponding SPF number when the ultraviolet (UV) radiation sensing means is exposed to the existing impinging light conditions. A timer is set which allows the user to be notified when the predetermined amount of exposure time has been reached. The device includes a photovoltaic (PV) cell for self power having a battery back-up if ambient light conditions, and thus the generated photovoltaic output, falls beneath a predetermined threshold.

REFERENCES:
patent: 4749865 (1988-06-01), Schelbr
patent: 4818491 (1989-04-01), Tariff
patent: 5036311 (1991-07-01), Moran et al.

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