FR2471627A1 - Sundial coupled electronically to visual display within building - uses diodes controlled by photocells in sundial face and supplied via solar cell - Google Patents

Sundial coupled electronically to visual display within building - uses diodes controlled by photocells in sundial face and supplied via solar cell Download PDF

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Publication number
FR2471627A1
FR2471627A1 FR7930546A FR7930546A FR2471627A1 FR 2471627 A1 FR2471627 A1 FR 2471627A1 FR 7930546 A FR7930546 A FR 7930546A FR 7930546 A FR7930546 A FR 7930546A FR 2471627 A1 FR2471627 A1 FR 2471627A1
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France
Prior art keywords
sundial
face
time
building
sun
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Application number
FR7930546A
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French (fr)
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MORIN ROY GEORGES
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MORIN ROY GEORGES
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Application filed by MORIN ROY GEORGES filed Critical MORIN ROY GEORGES
Priority to FR7930546A priority Critical patent/FR2471627A1/en
Publication of FR2471627A1 publication Critical patent/FR2471627A1/en
Withdrawn legal-status Critical Current

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Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B49/00Time-pieces using the position of the sun, moon or stars
    • G04B49/02Sundials
    • G04B49/04Graduation or shaping of dials

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  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Abstract

The sundial is coupled to a time display via photocells incorporated in the face of the sundial controlling LED's arranged at corresponding points on an internal display face. The graduated scale of the sundial is displaced parallel to the face to provide correct time indications from the position of the sun which are independent of the time of year. Pref. the system is energised solely with the power of the sun. The LED circuit being coupled to a nickel-cadmium cell supplied from a solar cell incorporated in the face of the sundial. The accuracy of the sundial, which is dependent on its size, can be precise to within a minute by using a photocell for each minute spaced along an arc corresponding to the time range within each 24 hours in which the sundial is applicable.

Description

CADRAN SOLAIRE ELECTRONIQUE
La présente invention concerne les instruments du type "cadran solaire" permettant de lire l'heure b l'intérieur d'un bâtiment quelconque comme a' l'extérieur et avec plus de précision que le cadran solaire et ce, tant pour l'heure d'été que pour l'heure d'hiver.
ELECTRONIC SOLAR DIAL
The present invention relates to instruments of the "sundial" type making it possible to read the time inside any building as well as outside and with more precision than the sundial, both for the time summer time only for winter time.

Dans les dispositifs connus, la lecture de l'heure, grâce au soleil, ne peut s'effectuer qu'à l'extérieur. Pour ce faire, le cadran solaire est composé d'une surate portant des lignes qui per-mettent de repérer l'heure diapres la position de l'ombre portée par l'extrémité d'une tige implantée dans la surface du cadran en question. In known devices, the reading of the time, thanks to the sun, can only be done outside. To do this, the sundial is made up of a surat bearing lines which allow to identify the diaphragm hour the position of the shadow carried by the end of a rod implanted in the surface of the dial in question.

Des progrès ont été apportes aux cadrans solaires en donnant a' la table habituellement plane une forme cylindriqueO Geest a dire que la table est une demi-circonférence située dans le plan de l'é- quateur donc perpendiculaire au style qui se trouve lire parallèle a' l'axe des polos. Cette construction permet de tracer des lignes parallèles équidistantes constituant les génératrices du demi-cylin dre intérieur.On comprend aisément que cette solution simplifie la construction de ce type de cadran solaire qui peut avoir des dimensions importantes sous un fable encombrement, la précision de lec- ture dépend des dimensions. Progress has been made in sundials by giving the usually flat table a cylindrical shape. Geest to say that the table is a semi-circumference located in the plane of the equator therefore perpendicular to the style which is found to be parallel to 'the axis of the polo shirts. This construction makes it possible to draw equidistant parallel lines constituting the generators of the inner half-cylinder. It is easy to understand that this solution simplifies the construction of this type of sundial which can have large dimensions under a small footprint, the accuracy of read- ture depends on the dimensions.

L'invention ci-décrite est un perfectionnement électronique apporté au cadran solaire de préférence circulaire, choisi pour la précision de lecture dûe à l'équidistance du tracé. Pour ce faire, il suffit de remplacer les graduations en heures-du cadran solaire par des cellules photo électriques de très petites dimensions au sulfure de cadmium par exemple, il en existe de 3 millimètres de diamètre.A titre d'exemple, en tenant compte de cellules de 3 mil 1impètres de diamètre, si l'on désire une précision de la minute en admettant I4 heures de lecture continue de 6 heures du matin à 20 heures soit 854 minutes, il faudrait employer autant de cellules dans quel cas la demi-circonférence de lecture du cylindre employé devra faire un développement de 2562cm soit I63 cm de diamètre ce qui représenterait un cas extrême. The invention described below is an electronic improvement made to the preferably circular sundial, chosen for the reading accuracy due to the equidistance of the line. To do this, simply replace the hour graduations of the sundial with very small photoelectric cells with cadmium sulfide for example, there are 3 millimeters in diameter. For example, taking into account cells of 3 mil 1impeters in diameter, if one wishes a precision of the minute by admitting 14 hours of continuous reading from 6 am to 8 pm or 854 minutes, it would be necessary to use as many cells in which case the half reading circumference of the cylinder used will have to develop 2562cm or I63 cm in diameter which would represent an extreme case.

Avec un cadran solaire normal on ne peut apprécier une lecture que de IO minutes en IO minutes, ont peut donc considérer que de lire l'heure toutes les 5 minutes serait un bon résultat, ce que l'on peut obtenir avec I70 cellules pour un diamètre de cadran de 33 cm environ. With a normal sundial one can only appreciate a reading of IO minutes in IO minutes, so we can consider that reading the time every 5 minutes would be a good result, which can be obtained with I70 cells for a dial diameter of approximately 33 cm.

Considérant les cellules photo-électriques à leur place sur le pourtour de la demi-circonférence, il suffit de les relier par fils associés sous gaine à autant de diodes électro-luminescentes pour la lecture de l'heure à l'intérieur. Ces diodes peuvent être disposées sur une réglètte rectiligne fixe, de longueur égale à la somme des diamètres de diodes accolées, il en existe de 2 mm de diamètre donc environ 170 x 2 = 340 mm de longueur de réglette. La version rectiiigne est préférable pour les raisons suivantes
IO) la réglette étant fixe pas de déplacements de fils.
Considering the photoelectric cells in their place on the periphery of the half-circumference, it is enough to connect them by wires associated under sheath to as many light-emitting diodes for the reading of the time inside. These diodes can be arranged on a fixed rectilinear strip, of length equal to the sum of the diameters of contiguous diodes, there are 2 mm in diameter, therefore approximately 170 x 2 = 340 mm of strip length. The straight version is preferable for the following reasons
IO) the strip being fixed no displacement of wires.

20) parce qu'une réglette mobile graduée en heure et minutes peut coulisser parallèlement à la réglette fixe ce qui permet de lire les heures d'été ou d'hiver sans complication par simple déplacement d'une division horaire vers la droite ou vers la gauche. 20) because a movable strip graduated in hours and minutes can slide parallel to the fixed strip which allows summer or winter hours to be read without complication by simply moving a time division to the right or to the left.

Le fait d'avoir sous gaine un faisceau de fils de la longueur que l'on veut à partir du cadran solaire (obligatoirement placé a l'extérieur) permet de transmettre gracie aux cellules photo-électriques dont la résistance varie au passage de l'ombre du style ce qui provoque l'allumage des diodes à distance donc en tous lieux, intérieur de préférence. The fact of having a sheath of wires of the length that one wants from the sundial (necessarily placed outside) allows to transmit gracefully to the photoelectric cells whose resistance varies with the passage of the shadow of the style which causes the lighting of the diodes from a distance so anywhere, preferably inside.

En ce qui concerne l'énergie nécessaire pour allumer les diodes, il suffit d'avoir en plus une cellule mère au silicium par exemple, qui charge un mini accumulateur au cadmium-nickel de type bouton dont l'énergie sert à l'allumage des diodes électro-luminescentes dont une seule est allumée à la fois donc'énergie continue mais infime. Regarding the energy required to light the diodes, it is enough to have in addition a silicon mother cell for example, which charges a mini cadmium-nickel button type accumulator whose energy is used to ignite the Light-emitting diodes, only one of which is lit at a time, therefore continuous but tiny energy.

En résumé, sans aucun mécanisme, cette.invention permet seulement lorsque le soleil brille, de lire l'heure à l'intérieur,entre autre, tant heure d'été que heure d'hiver à partir d'un cadran so laire extérieur et ceci avec beaucoup plus de précision. In summary, without any mechanism, this invention allows only when the sun is shining, to read the time inside, among other things, both summer and winter time from a dial so outside and this with much more precision.

Claims (2)

REVENDICATIONS 10) Système électronique de lecture a' distance d'un cadran solaire à l'intérieur d'un bâtiment, par exemple. 2 ) Possibilité de lire l'heure d'été ou l'heure d'hiver par simple déplacement d'une réglette mobile (parallèle è celle supportant les diodes électro-luminiscantes graduée en heures et minutes.CLAIMS 10) Electronic system for remote reading of a sundial inside a building, for example. 2) Possibility of reading summer time or winter time by simply moving a mobile strip (parallel to that supporting the light-emitting diodes graduated in hours and minutes. 30) Aucune alimentation sur secteur ou pile, le soleil se chargeant30) No mains or battery power, the sun is charging de tout, à savoir of everything, namely allumage et extinction de diodes électro-luminescentes par cel-  switching on and off of light-emitting diodes by it lules photo-électriques occultées par l'ombre du soleil sur le photoelectric cells obscured by the shade of the sun on the pourtour du cadran solaire. L'alimentation électriquê des diodes around the sundial. Power supply of diodes électro-luminiscentes assurée par un mini accu au cadmium-nickel  electro-luminiscentes provided by a mini cadmium-nickel battery alimenté par une cellule mère au silicium de préféren-ce qui se powered by a preferred silicon mother cell which trouve sur le cadran solaire. found on the sundial. 40) Précision de lecture dépendant uniquement des dimensions du 40) Reading accuracy depending only on the dimensions of the cadran solaire. Précision pouvant atteindre la minute.  sundial. Accuracy up to a minute.
FR7930546A 1979-12-11 1979-12-11 Sundial coupled electronically to visual display within building - uses diodes controlled by photocells in sundial face and supplied via solar cell Withdrawn FR2471627A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7930546A FR2471627A1 (en) 1979-12-11 1979-12-11 Sundial coupled electronically to visual display within building - uses diodes controlled by photocells in sundial face and supplied via solar cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7930546A FR2471627A1 (en) 1979-12-11 1979-12-11 Sundial coupled electronically to visual display within building - uses diodes controlled by photocells in sundial face and supplied via solar cell

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FR2471627A1 true FR2471627A1 (en) 1981-06-19

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387999A (en) * 1981-08-25 1983-06-14 Shelley Edwin F Electronic sundial apparatus
US4656748A (en) * 1985-02-28 1987-04-14 Thual Jacques G Sundial arrangement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387999A (en) * 1981-08-25 1983-06-14 Shelley Edwin F Electronic sundial apparatus
US4656748A (en) * 1985-02-28 1987-04-14 Thual Jacques G Sundial arrangement

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