Sun dial and method for determining average sunlight

Details Sun dial and method for determining average sunlight Sun dial and method for determining average sunlight

2006-09-12

2006-09-12

Cuneo, Kamand (Department: 2841)

Horology: time measuring systems or devices

Combined with disparate device

Ambient condition detector

C368S010000, C033S270000

Reexamination Certificate

active

07106660

ABSTRACT:
A sun dial including a housing, a light detector mounted on the housing exposed to detect ambient light, a logic circuit mounted in the housing for processing the detected light for determining over a preselected period of time the average light detected by the light detector, and an indicator to indicate upon demand, the average light detected during the preselected period of time. A method for determining average light detected over a period of time by detecting light above a preselected threshold indicative of darkness, while noting the time of darkness, adjusting the period of time by subtracting the time of darkness from the period of time, calculating the average light detected over the adjusted period of time, and giving a visual indication of the average light detected.

REFERENCES:
patent: 5107123 (1992-04-01), Shi
patent: 5644358 (1997-07-01), Miyano et al.
patent: 6597457 (2003-07-01), Silverglate et al.
patent: 6760099 (2004-07-01), Lewis et al.
patent: 2003/0066299 (2003-04-01), Aoki
patent: 2005/0230598 (2005-10-01), Hopkins et al.

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