Night and day earth clock calendar

Details Night and day earth clock calendar Night and day earth clock calendar

1991-03-29

1993-03-23

Roskoski, Bernard

Horology: time measuring systems or devices

Plural time zones

With movable disk display

368 23, 368 28, G04B 1922

Patent

active

051970430

ABSTRACT:
A clock, a calendar, and a two dimensional model of the earth viewed looking at the polar axis as the earth is rotated during a twenty-four hour period thus showing day and night, dawn and dusk. The shadow cast on the earth by the absence of the sun's rays are also shown. The changing of said shadow to show the seasons of the year is also shown as the shadow is rotated once every 365 days. The disc containing the rotating shadow has a pointer that tells the observer the month of the year and the day of the month along with the sign of the zodiac. The rotating earth map has symbols to represent the major cities of the earth and a symbol to represent the pole.

REFERENCES:
patent: 197246 (1877-11-01), Cates
patent: 557173 (1896-03-01), Thompson
patent: 641540 (1900-01-01), Pheils
patent: 1344913 (1920-06-01), Long
patent: 1990012 (1935-02-01), Woodruff
patent: 2245842 (1941-06-01), Werner
patent: 2657525 (1953-11-01), Allen
patent: 4579468 (1986-04-01), Shannon

Affiliated with

Also associated with

Rating

Night and day earth clock calendar does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1357419