Suntan indicator

Details Suntan indicator Suntan indicator

1989-05-31

1991-01-15

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Ultraviolet light responsive means

G01J 142

Patent

active

049856324

ABSTRACT:
An electronic wristwatch having an LCD for time of day, day of month and month of year, as well as four key switches, includes a photodiode for detecting skin damaging ultraviolet, tanning radiation. The photodiode, a microcomputer, key switches, display and a battery are electrically connected to each other so that in response to activation of the key switches the microcomputer stores signals indicative of the time functions, intensity of the skin damaging ultraviolet radiation instantaneously incident on the photodiode at the time one of the key switches is activated, skin type of a subject wearing the watch, subject sun protection factor, and elapsed time from the time one of the key switches is activated, and the remaining time the subject skin can be safely exposed to the skin damaging radiation. The remaining time indication is derived independently of accumulated radiation incident on the photodiode which need not be pointed at the radiation source except when the one key is activated. The remaining time indication can be modified by subsequently pointing the detector at the radiation source and/or entering a different sun protection factor.

REFERENCES:
patent: 3710115 (1973-01-01), Jubb
patent: 3851970 (1974-12-01), Adler et al.
patent: 3891849 (1975-06-01), Felice et al.
patent: 3917948 (1975-11-01), Strutz
patent: 3971943 (1976-07-01), Jeunehomme et al.
patent: 4010372 (1977-03-01), Adler et al.
patent: 4015130 (1977-03-01), Landry et al.
patent: 4065672 (1977-12-01), Harpster
patent: 4086489 (1978-04-01), Piltingsrud
patent: 4229733 (1980-10-01), Tulenko et al.
patent: 4348664 (1982-09-01), Boschetti et al.
patent: 4428050 (1984-01-01), Pellegrino et al.
patent: 4485306 (1984-11-01), Braunstein et al.
patent: 4535244 (1985-08-01), Burnham
patent: 4608492 (1986-08-01), Burnham
patent: 4608655 (1986-08-01), Wolf et al.
patent: 4704535 (1987-11-01), Leber et al.
patent: 4825078 (1989-04-01), Huber et al.
patent: 4851685 (1989-07-01), Dubgen
patent: 4851686 (1989-07-01), Pearson
Berger, Photochemistry & Photobiology, 1976, vol. XXIV, pp. 587-593.

Affiliated with

Also associated with

Rating

Suntan indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Suntan indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Suntan indicator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-56788