EP0396473B1 - Procédé et appareil pour représenter le mouvement d'une marée - Google Patents

Procédé et appareil pour représenter le mouvement d'une marée Download PDF

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Publication number
EP0396473B1
EP0396473B1 EP90401197A EP90401197A EP0396473B1 EP 0396473 B1 EP0396473 B1 EP 0396473B1 EP 90401197 A EP90401197 A EP 90401197A EP 90401197 A EP90401197 A EP 90401197A EP 0396473 B1 EP0396473 B1 EP 0396473B1
Authority
EP
European Patent Office
Prior art keywords
disc
ellipse
scale
rotation
tide
Prior art date
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 - Lifetime
Application number
EP90401197A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0396473A1 (fr
Inventor
Bernard Vuarnesson
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.)
Individual
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Individual
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 Individual filed Critical Individual
Publication of EP0396473A1 publication Critical patent/EP0396473A1/fr
Application granted granted Critical
Publication of EP0396473B1 publication Critical patent/EP0396473B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/26—Clocks or watches with indicators for tides, for the phases of the moon, or the like
    • G04B19/266—Clocks or watches with indicators for tides, for the phases of the moon, or the like with indicators for tides

Definitions

  • the invention relates to a method and an apparatus for representing the movement of a tide.
  • An apparatus for representing the movement of a tide constituted by a needle rotating at a constant speed of 1 revolution per 12 h 25 min approximately in front of a circular scale graduated in tide hours. See prior art US-A-4623259, GB-A-2050656.
  • the present invention aims to provide a better representation of this movement.
  • the invention also relates to an apparatus for indicating the hours of a tide, characterized in that it comprises an ellipse and means for rotating the ellipse around an axis perpendicular to the ellipse at its center in that the interval of time between the successive passages of the major axis of the ellipse and the minor axis of the ellipse by the same position corresponds to the interval of time that passes between a high tide and a low tide successive.
  • the apparatus shown in Figure 1 is a simplified version of a semi-diurnal tide pendulum, where the result of the attractions of the moon and the sun is represented by an elliptical disc E.
  • the average lunar cycle is 29 days 12 hours 44 minutes and 3 seconds or 42,524 minutes and 3 seconds. 57 high tides and 57 low tides occur during this time.
  • the average interval between two full (or low) seas is therefore 746 minutes (12 hours 26 min) + 2.10 seconds or 24 h 52 min between four full seas.
  • FIG. 1 the means which rotate the ellipse counterclockwise around a axis perpendicular to the ellipse at its center (J) have been shown diagrammatically at M. It is not necessary to describe them in more detail, their realization being within the reach of those skilled in the art, since the functions of these means have been explained above.
  • the rectilinear scale R here vertical, graduated in hours of tide, is also shown, in front of which the ellipse rotates so that the edge of the ellipse sweeps across this scale, successively designating the hours.
  • the apparatus shown also includes an ordinary pendulum P.
  • This device includes an ellipse L and another ellipse S representing the respective effects of the moon (ellipse L) and the sun (ellipse S) if the ratio (ba) / (dc) of the difference in length between the major axis and the minor axis of the large ellipse (L) at the difference in length between the major axis and the minor axis of the small ellipse (S) is between 2 and 3, preferably between 2.3 and 2.7, and even better equal to 2.5 or close to 2.5.
  • the ellipse S is placed inside the ellipse L, in a central circular opening N.
  • Appropriate means diagrammed in Z animate the ellipse S of a uniform circular movement of one revolution per 24 h around its fixed center I, corresponding to the solar rhythm, and the ellipse L of a circular movement corresponding to the average rhythm from the passage of the moon to the meridian, a revolution in 24 h 52 min around its center J, which is vertically mobile under the action of the rotation of S which acts like a cam in the circular cavity of L.
  • the device has a vertical scale (shown schematically by window F) graduated in hours of the tide. If we take the examples above, the graduations cover 2.5 cm (small pendulum) or 2.5 m (wall pendulum).
  • This device gives several categories of indications for the coasts subjected to the regime of semi-diurnal tides.
  • the height of the tides (or coefficient) varies in the same direction as the distance of the axes I and J (figure 6) measured at the time of the high sea.
  • F ′ is only readable when the large ellipse L has its vertical axis.
  • This disk D can be located in front of the ellipse L as in the case of figure 8 or behind the ellipse L and, in this case, the reading will be done in a window practiced in L.
  • This disk D can be adjustable in rotation around the center I, in relation to the ellipse S so as to adjust the lunar calendar independently of the local tide times.

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Electric Clocks (AREA)
EP90401197A 1989-05-05 1990-05-04 Procédé et appareil pour représenter le mouvement d'une marée Expired - Lifetime EP0396473B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8905997 1989-05-05
FR8905997A FR2646724A1 (fr) 1989-05-05 1989-05-05 Procede et appareil pour representer le mouvement d'une maree

Publications (2)

Publication Number Publication Date
EP0396473A1 EP0396473A1 (fr) 1990-11-07
EP0396473B1 true EP0396473B1 (fr) 1992-12-30

Family

ID=9381450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401197A Expired - Lifetime EP0396473B1 (fr) 1989-05-05 1990-05-04 Procédé et appareil pour représenter le mouvement d'une marée

Country Status (4)

Country Link
US (1) US5114345A (enrdf_load_stackoverflow)
EP (1) EP0396473B1 (enrdf_load_stackoverflow)
DE (1) DE69000691D1 (enrdf_load_stackoverflow)
FR (1) FR2646724A1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH680694B5 (enrdf_load_stackoverflow) * 1990-12-28 1993-04-30 Dubois & Depraz Sa
CH680631B5 (enrdf_load_stackoverflow) * 1991-04-15 1993-04-15 Lemania Nouvelle Sa
US5423436A (en) * 1993-04-28 1995-06-13 Morrow; Lester A. Pilfer-proof product distribution system
FR2741966B1 (fr) * 1995-10-09 1998-02-13 Vaichere Luc Dispositif illustrant le mouvement des marees
DE10004304C2 (de) * 2000-02-01 2002-01-17 Juergen Wesseler Gezeitenanzeige-Karte

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2735486C2 (de) * 1977-08-05 1983-05-26 Hubertus 2280 Westerland Jessel Vorrichtung zum Ermitteln der Zeitpunkte von Ebbe und Flut für mehrere Orte eines Küstengebiets
GB2050656A (en) * 1979-05-16 1981-01-07 Riepe C W A Tide Clock
DE3105243A1 (de) * 1981-02-13 1982-09-02 Gebr. Staiger GmbH Fabrik für Feinmechanik und Elektrotechnik, 7742 St. Georgen "zeitmessgeraet"
US4623259A (en) * 1985-01-14 1986-11-18 Oberst E Ernest Tide timer
CH672223B5 (enrdf_load_stackoverflow) * 1988-03-31 1990-05-15 Catena S A
US4849949A (en) * 1988-05-24 1989-07-18 Voth Allen D Tide clock device

Also Published As

Publication number Publication date
FR2646724B1 (enrdf_load_stackoverflow) 1993-02-26
EP0396473A1 (fr) 1990-11-07
DE69000691D1 (de) 1993-02-11
FR2646724A1 (fr) 1990-11-09
US5114345A (en) 1992-05-19

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