Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB14856/38A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JULIEN PAUL MARIE GUADET
Original Assignee
JULIEN PAUL MARIE GUADET
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JULIEN PAUL MARIE GUADETfiledCriticalJULIEN PAUL MARIE GUADET
Publication of GB500518ApublicationCriticalpatent/GB500518A/en
G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
G04B49/00—Time-pieces using the position of the sun, moon or stars
G04B49/02—Sundials
Landscapes
Physics & Mathematics
(AREA)
Astronomy & Astrophysics
(AREA)
General Physics & Mathematics
(AREA)
Optical Elements Other Than Lenses
(AREA)
Abstract
500,518. Sundials. GUADET, J. P. M. May 18, 1938, No. 14856. Convention date, June 4, 1937. [Class 139] An equatorial, sundial is adapted for use throughout the year by the provision above the dial 11 of a convex mirror 22 arranged to direct sun. light on to the dial. The dial is adapted to be rotated in its plane for adjustment, with the aid of a scale 13 and an index 29, according to the longitude of the place, summer time and the equation of time. A luminous line for indicating the time is formed by the sunlight passing between two triangularshaped, rotatable prisms 16, 17.
GB14856/38A1937-06-041938-05-18Improvements in sundials
ExpiredGB500518A
(en)
Glass of appropriate coloration, with mounting adaptable to ordinary glasses and lenses, to preserve the sight of sunlight. (Machine-translation by Google Translate, not legally binding)