Back to results
US 4,749,865 AGranted
Apparatus for determining an optium sunscreen factor at any given time
OwnerKlaus Schellerinventor
Life of this patent
Estimating the term…
Abstract
An apparatus for determining an optimum sunscreen factor at any given time for the purpose of selecting a sunscreen suitable for protecting the skin, located in a housing is an indicator for the sunscreen factor, an energy source, preferably a battery, an on-off switch, as well as a sensor responsive to the tanness of the skin and provided with a pick-up which is connected via an electronic evaluation circuit with the indicator.
Claims19
An apparatus for measuring the degree of skin tanness and determining an optimum sunscreen factor at any given time for the purpose of selecting a sunscreen suitable for protecting the skin comprising:
- a housing including an energy source,
- an electrical sensor powered by said energy source and being responsive to the degree of skin tanness,
- said electrical sensor including a reflection photocell operating in the red spectral range,
- said reflection photocell including a light source and at least one photometric element,
- an electrical evaluation circuit responsive to said electrical sensor for determining the optimum sunscreen factor, and
- an indicator for displaying said determined optimum sunscreen factor.
3 more elements
Dependencies are inferred from the claim text.