EP0396473A1 - Verfahren und Vorrichtung zur Anzeige der Gezeitenphasen - Google Patents

Verfahren und Vorrichtung zur Anzeige der Gezeitenphasen Download PDF

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Publication number
EP0396473A1
EP0396473A1 EP90401197A EP90401197A EP0396473A1 EP 0396473 A1 EP0396473 A1 EP 0396473A1 EP 90401197 A EP90401197 A EP 90401197A EP 90401197 A EP90401197 A EP 90401197A EP 0396473 A1 EP0396473 A1 EP 0396473A1
Authority
EP
European Patent Office
Prior art keywords
ellipse
tide
scale
center
axis
Prior art date
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Granted
Application number
EP90401197A
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English (en)
French (fr)
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EP0396473B1 (de
Inventor
Bernard Vuarnesson
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP0396473A1 publication Critical patent/EP0396473A1/de
Application granted granted Critical
Publication of EP0396473B1 publication Critical patent/EP0396473B1/de
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Expired - Lifetime legal-status Critical Current

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    • 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.
  • the present invention aims to provide a better representation of this movement.
  • the method of the invention can, according to different embodiments, in particular present one or more of the following additional characteristics: - we use the outline of the ellipse to control the reading of a scale graduated in tide hours, - the hours of the tide are represented by graduations on a fixed scale, the scale representing the mean time interval between a high tide and a successive low tide, the ellipse is rotated around an axis perpendicular to the plane of the ellipse and its center, the ellipse being chosen so that the difference in the lengths of the major axis and the minor axis of the ellipse is equal to the difference between the two graduations which correspond respectively to said low tide and said successive high tide, and we use the edge of the ellipse to control the reading of the graduations on the scale, - we use the edge of the ellipse as cursor on the scale, - the edge of the ellipse is used as a cam to control the movement of an index on the scale, - a
  • 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.
  • this device may also have one or more of the following other characteristics: - It includes a scale graduated in hours of tide and the ellipse is chosen so that the difference in the lengths of the major axis and the minor axis of the ellipse is equal to the difference between the two graduations which correspond respectively to said tide low and said high tide successive, and the edge of the ellipse is used to control the reading of the graduations on the scale, it includes a scale graduated in hours of tide and the edge of the ellipse constitutes a cam which actuates the movement of a cursor on said scale, - said scale is straight, - it includes means for rotating the ellipse so that the rotation of the ellipse is, at least approximately, in phase with the lunar cycle, it includes another ellipse which attacks like a cam a circular track concentric with said ellipse and integral with said ellipse, the ratio of the difference in the lengths of the major axis and the minor
  • 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.
  • Daily variations in the speed of rotation of the elliptical disc during a lunar revolution are obtained for example: - either by a chain of gears and cams driven by a clockwork movement having an axis rotating at the regular speed of one revolution in 746 minutes (or its multiples or submultiples), - either by a quartz-driven movement equipped with an appropriate microprocessor.
  • 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.
  • R rectilinear scale
  • R here vertical, graduated in hours of tide, in front of which the ellipse rotates so that the edge of the ellipse sweeps this scale by successively designating the hours.
  • the apparatus shown also includes an ordinary pendulum P.
  • This simplified device has the following advantages in particular: - the representation of the movement of the tides by an ellipse recalls the mechanical reality of the phenomenon due to universal attraction, - the ellipse allows to represent gradually the movement of rising and falling tide as well as the two discontinuities (high tide and base tide) during which the movement changes direction, - if the ellipse turns anti-clockwise, the slope of the tangent to the ellipse at the point of intersection of the ellipse with the vertical axis of the graduated scale or through a window F (see figure 5) instantly indicates the direction of movement (rising / falling tide ⁇ ), - by an appropriate choice of the dimensions of the ellipse, we can illustrate the rule of twelfths (see below).
  • 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.

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  • 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 Verfahren und Vorrichtung zur Anzeige der Gezeitenphasen Expired - Lifetime EP0396473B1 (de)

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 true EP0396473A1 (de) 1990-11-07
EP0396473B1 EP0396473B1 (de) 1992-12-30

Family

ID=9381450

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401197A Expired - Lifetime EP0396473B1 (de) 1989-05-05 1990-05-04 Verfahren und Vorrichtung zur Anzeige der Gezeitenphasen

Country Status (4)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509403A1 (de) * 1991-04-15 1992-10-21 Nouvelle Lémania S.A. Uhrwerk
FR2741966A1 (fr) * 1995-10-09 1997-06-06 Vaichere Luc Dispositif illustrant le mouvement des marees
DE10004304C2 (de) * 2000-02-01 2002-01-17 Juergen Wesseler Gezeitenanzeige-Karte

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH680694B5 (de) * 1990-12-28 1993-04-30 Dubois & Depraz Sa
US5423436A (en) * 1993-04-28 1995-06-13 Morrow; Lester A. Pilfer-proof product distribution system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2735486A1 (de) * 1977-08-05 1979-02-08 Hubertus Jessel Permanente gezeitenuhr (immerwaehrender richtwertgeber fuer hoch- und niedrigwassertermine in den gezeitenabhaengigen hafengebieten groesserer kuestenabschnitte)
GB2050656A (en) * 1979-05-16 1981-01-07 Riepe C W A Tide Clock
US4623259A (en) * 1985-01-14 1986-11-18 Oberst E Ernest Tide timer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3105243A1 (de) * 1981-02-13 1982-09-02 Gebr. Staiger GmbH Fabrik für Feinmechanik und Elektrotechnik, 7742 St. Georgen "zeitmessgeraet"
CH672223B5 (de) * 1988-03-31 1990-05-15 Catena S A
US4849949A (en) * 1988-05-24 1989-07-18 Voth Allen D Tide clock device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2735486A1 (de) * 1977-08-05 1979-02-08 Hubertus Jessel Permanente gezeitenuhr (immerwaehrender richtwertgeber fuer hoch- und niedrigwassertermine in den gezeitenabhaengigen hafengebieten groesserer kuestenabschnitte)
GB2050656A (en) * 1979-05-16 1981-01-07 Riepe C W A Tide Clock
US4623259A (en) * 1985-01-14 1986-11-18 Oberst E Ernest Tide timer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0509403A1 (de) * 1991-04-15 1992-10-21 Nouvelle Lémania S.A. Uhrwerk
US5327400A (en) * 1991-04-15 1994-07-05 Nouvelle Lemania Sa Time piece with lunar phase and tides display
FR2741966A1 (fr) * 1995-10-09 1997-06-06 Vaichere Luc Dispositif illustrant le mouvement des marees
DE10004304C2 (de) * 2000-02-01 2002-01-17 Juergen Wesseler Gezeitenanzeige-Karte

Also Published As

Publication number Publication date
DE69000691D1 (de) 1993-02-11
FR2646724B1 (de) 1993-02-26
FR2646724A1 (fr) 1990-11-09
US5114345A (en) 1992-05-19
EP0396473B1 (de) 1992-12-30

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