Horology: time measuring systems or devices – Astronomical
Patent
1987-11-24
1988-07-19
Roskoski, Bernard
Horology: time measuring systems or devices
Astronomical
368 16, 368 17, 368223, 368221, G04B 1926
Patent
active
047590025
ABSTRACT:
A clock having a housing which contains two internal disks and a motor for rotation of those disks on a shaft is disclosed. An hour disk is provided having a shaded region representing night and an unshaded region representing day. The hour disk is positioned to appear through a opening in the clock face. The face of the clock may have one or more openings to expose the minute and hour disks. One of the openings has a numerical representation of hours provided on the clock face there around. The clock is arranged so that the line separating the dark and light regions of the hour disk indicates the hour of day by pointing to a number on the face, and also graphically represents the amount of time from and to the previous and next sunrise or sunset.
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patent: 309306 (1884-12-01), Lindauer
patent: 536504 (1895-03-01), Arriaga
patent: 723489 (1903-03-01), Rosenbusch
patent: 2051611 (1936-08-01), Liner
patent: 2130873 (1938-09-01), Bourquin
patent: 2266183 (1941-12-01), Fergusson
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patent: 3439492 (1969-04-01), Gravenson
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patent: 3890777 (1975-06-01), Stanish
patent: 4605311 (1986-08-01), Loitz
patent: 4669891 (1987-06-01), Rosevear
Two Photographs of an Existing Grandfather Clock Disclosing a Supplementary Face Artistically Representing the Relative Daylight.
An Undated Advertisement for a Grandfather Clock having a Supplementary Face for the Graphic Representation of Daylight.
An Undated Magazine Advertisement for a Wristwatch having Hours and Minutes Displayed in a Semi-Circle Rather than a Conventional Circle.
Roskoski Bernard
Shaffer Thomas R.
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