Two speed clock for daylight saving

Horology: time measuring systems or devices – Displays or display device details

Patent

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Details

368157, 368228, 368231, G04B 1900

Patent

active

049531492

ABSTRACT:
A two-speed battery powered quartz daylight saving clock operating for a first six months' period beginning on the shortest day of the year at two and one-half seconds per hour fast (fast time) and then being adjustable to operate for a second six months' period beginning on the longest day of the year at two and one-half seconds per hour slow (slow time) to complete each annual cycle.

REFERENCES:
patent: 4763311 (1988-08-01), Marvosh
Letter to the Editor, Mensa Magazine, 3/86, A New Kind of Setting Time, Williams.

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