US3815351A - Calendar indicator for time measuring systems - Google Patents

Calendar indicator for time measuring systems Download PDF

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Publication number
US3815351A
US3815351A US00330105A US33010573A US3815351A US 3815351 A US3815351 A US 3815351A US 00330105 A US00330105 A US 00330105A US 33010573 A US33010573 A US 33010573A US 3815351 A US3815351 A US 3815351A
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US
United States
Prior art keywords
revolution
actuating
reference signal
indicator
toothed wheels
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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
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US00330105A
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English (en)
Inventor
P Vovelle
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Thales SA
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Thomson CSF SA
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Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
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Publication of US3815351A publication Critical patent/US3815351A/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time pieces
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C17/00—Indicating the time optically by electric means
    • G04C17/005—Indicating the time optically by electric means by discs
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C17/00—Indicating the time optically by electric means
    • G04C17/005—Indicating the time optically by electric means by discs
    • G04C17/0058—Indicating the time optically by electric means by discs with date indication
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor

Definitions

  • the present invention relates to the field of time pieces such as clocks and watches in which, in addition to information relating to the passage of time expressed in hours, minutes and possibly seconds, corresponding to the instant of observation, there are fumishedadditional indications as to the month and the day of the week, by a device known as a date indicator.
  • the mechanical energy required'for the daily changing of the date and day is usually taken, during the hours preceding the change, by a progressive winding of a spring, from the main drive mechanism on which it thus imposes temporarily a large additional load representing, in typical cases, a factor for the device displayingthe month and if that of the day of the week. is addedthereto.
  • Such a variation in the drive torque in the course, of the 24 hours of a day contrary to the known conditions of the isochronism of the oscillations of a balance, limits the precision that the hours mechanism alone would have afforded.
  • It comprises a daily actuating-devicefor a date indicator of anelectric or electronic watch, said watch 1 comprising a motion-work constituted by a train of the spindles of the seconds, the spindle of the minutes and the spindle of the hours at speeds of rotation respectively equal to l revolution per minute, 1 revolution per hour, and 2 revolutions per day, said device comprising movable reference elements the movement of which is controlled by said spindles, defining the angular positions of the reference elements with respect to fixed reference elements, each of said fixed reference elements being respectively subjected to an action produced by each of said movable reference elements upon their passage through a face-to-face position, each of said fixed reference elements producing under said action signals, said signals being applied to an electric control circuit controlling the display system of said date indicator, said circuit effecting said control only when said signals are simultaneous, and means inserted between said spindle of the hours and said display system for ensuring said actuation only every other revolution of said spindle of the hours.
  • FIG. 1 represents a device according to the invention employing magnetic sensors or pick-up devices
  • FIG. 2 represents a modification employing piezoelectric sensors or pick-up devices
  • FIG. 3 represents another modification employing mechanical sensors or pick-up devices
  • FIG. 4 is an explanatory diagram.
  • FIG. 1 represents a date indicator device according to the invention applied to a time piece which indicates the hours, minutes and seconds, the mechanism of which comprises, in accordance with a known arrangement, a first spindle l of the seconds driving the hand 2 of the seconds by means of a motor 3, a second tubular spindle 4 of the minutes, disposed in coaxial relation to the seconds spindle 1 and carrying the hand 5 of the minutes and driven by the seconds spindle through a train of gear wheels 6, 7, 8, 9, which gear down at the speed ratio of 1/60 and a third tubular spindle 10 of the mum isochronism by ensuring for the hours mechanism I hours in coaxial relation to the minutes spindle 4 and driven by said spindle through the train of gear wheels 1'1, 12, 13, 14 effecting a gearing down at the speed ratio of one-twelfth and carrying the hand 15 of the hours.
  • This structure will be hereinafter referred to under the name of motion-work.
  • Each of the three wheels 6, 9 and 71 respectively characterizes, by its angular position, measurable by the angular distance between fixed references or indexes and movable referencesor indexes carried by said spindles-orwheels, the time elapsed in 24 hours expressed in hours, minutes and seconds, namelyrespectively by one revolution per day, 1 revolution per hour and l revolution per minute.
  • the measurement of the angular differences is effected by respectively placing on each of said spindles a movable reference, integral with the spindles, and disposing in facing relation to said references three fixed elements constituting the forementioned fixed references and producing an electrical signal upon the passage of said movable references in front thereof.
  • the movable references or indexes are constituted by elements possessing a localized permanent magnetization, i.e. respectively one tooth of each one of the three gear wheels 6, 9 and 71, which teeth are indicated by the reference numbers 20, 21, 22 and the movable references are constituted by three magnetic sensors or pick-up devices 16, 17 and 18 disposed in facing relation to the peripheral part of the three gear wheels.
  • the signals which appear at the terminals of said sensors are sent to an electric circuit 19 of a type known per se which delivers an output signal only when there is simulteneous arrival at its input of the three signals produced by the passage of the movable magnetic references in front of the fixed magnetic sensors.
  • the setting of the relative angular positions of said movable references and the hands with which they are integral may be freely determined for any particular value of indication of the hours, minutes and. seconds.
  • the particular value of the chosen hour is midnight at which time indication the angular positions of the three hands coincide.
  • the output signal produced under these conditions by the circuit 19 determines the closure of a switch 23 inserted in a circuit comprising a source of voltage 24 and a drive element 25 which rotates through a constant angle, upon each switch closure, a disc 26 carrying the indications pertaining to the date numbers, only one of which appears at one time in a fixed opening 27 formed in the dial of the timepiece.
  • a push-button 40 connected in parallel with the switch 23 and accessible to the user, enables any desired date to be displayed at will either for an initial setting of the date'indicator or in the case of the months having less than 31 days in order to eliminate the days not needed.
  • the date indicator must be actuated only once every 24 hours as mentioned hereinbefore, which explains the addition to the known motion-work for driving the spindles of the hours,'minutes' and seconds of an additional spindle 72 which revolves at the rate of l revolution per 24 hours and carries by a gear wheel 71 which is driven by a gear wheel 71.which effects a gearing down at the speed ratio of one-half.
  • the spindle of the hours effects two revolutions per 24 hours, respectively corresponding to the passages at midday and midnight which renders it unsuitable, in the embodiment shown in FIG.
  • the electronic circuit 19 comprises a known circuit arrangement to the input of which the bi-daily signal is fed and at the output of which is delivered only one signal every two signals, thereby effecting by electronic means a division by two of the number of daily actuating signals coming from the hours spindle.
  • FIG. 2 represents another embodiment of the invention in which the magnetic sensors shown in FIG. 1 are replaced by piezoelectric sensors.
  • the device whose representation is limited to the elements which differ fr'om those shown inFIG. 1, comprises discs 60, 61, 62 integral with the spindles l, 4 and 10 and driven thereby, which discs perform the function of cams and carry the movable references the function of which has been explainedhereinbefore, in the form of localized'projections or lugs 80, 81, 82 disposed on their outer edge, each projection comprising an inclined leading portion and a rear portion perpendicular to said edge.
  • the corresponding fixed referen ces are constituted by mechanical sensor or follower elements such as 66, 67, 68 which bear, on one hand, on said outer edge of each cam and, on the other hand, on piezoelectric elements 73, 75 and 75 which are connected to the inputs of the circuit 19 which produces an output signal for controlling the date indicator.
  • the projections 80, 81, 82 compress the piezoelectric elements 73, 74 and 75 and develop therein, in accordance with the known physical phenomenon, electric charges which are applied to the circuit 19.
  • FIG. 3 represents yet another embodiment of the invention in which the fixed references and movable references co-operate through mechanical means.
  • the device the representation of which is limited to the elements which differ from those shown in FIG. 1, comprises discs 42, 43, 44 integral with the spindles 1, 4 and 10 and driven by the latter and carrying the aforementioned movable references in the form of recesses 45 formed on their outer edge and including a vertical leading flank and an inclined rear or trailing flank, and the fixed references are constituted by sensors, such as 46, which bear against said outer edge of of each disc and are capable of penetrating said reces ses and producing through control rods 47, the closure of switches 48, 49, 50 the necessity of which has already been mentioned for controlling the date indicator.
  • FIG. 4 is an explanatory diagram of the operation of the device according to the invention.
  • the coordinates represent horizontally the time and vertically the amplitudes of the signals produced by the three sensors, which may be amplitudes concerning magnitudes of electrical nature if the sensors are magnetic, or amplitudes of displacement concerning magnitudes of geometric nature if the sensors are mechanical.
  • the signals respectively corresponding to the hours, minutes and seconds must overlap in order to guaran tee the desired simultaneousness, and if there is adopted, in a typical example of orders of magnitude, respective durations of signals oft-0.5 hour, i0.5 minute and t I second, consequently ensuring actuation of the date indicator to within a precision of i 1 second, there is obtained, with movable references carried by gear wheels effecting respectively 1 revolution per day, l revolution per hour and l revolution per second, a precision as to the respective angular positions of i 7,5 on the spindle of the hours, 3 on the spindle of the minutes, and i 6 on the spindle of the seconds, which orders of magnitude are quite possible in practice.
  • a device for actuating a date indicator in a watch comprising:
  • first means for independently driving in continuous motion seconds, minutes and hours hands in said watch comprising a plurality of driving spindles, and a plurality of toothed wheels for actuating said spindles, rotating respectively at one revolution a minute, one revolution an hour and one revolution a day; second means for deriving electrical signals from said first means each time said toothed wheels have made a revolution; and coincidence means responsive to the simultaneous occurrence of said electrical signals for actuating said daily indicator.
  • said second means comprise moving means solid with said toothed wheels for producing a reference signal defining wheels angular position, and reference signal pick up fixed means responsible to the moving past them of said moving means, and generating said electrical signals.
  • a device as'claimed in claim 2 wherein said mov-. ing means comprise magnetized elements.
  • a device as claimed in claim 2, wherein said moving means for producing a reference signal comprise cams solid with said toothed wheels.
  • said reference signal pick up fixed means are piezoelectric elements said cams being arranged for exerting a pressure on said piezoelectric elements once per revolution.
  • a device as claimed in claim 4 wherein said reference signal pick up fixed means are switches controlled by said cams.
  • said coincidence means responsive to the simultaneous occurrence of said signals comprise a circuit which upon simultaneous occurrence of said electrical signals actuates a switch for closing a circuit comprising a source for actuating said day indicator.
  • a device as claimed in claim 7 comprising another separate switch for superseding the action of said switch and actuating said daily indicator for external control setting.
  • said signal producing moving means comprise at least one magnetized tooth of said toothed wheels.
US00330105A 1972-02-10 1973-02-06 Calendar indicator for time measuring systems Expired - Lifetime US3815351A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7204507A FR2170989B1 (hu) 1972-02-10 1972-02-10

Publications (1)

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US3815351A true US3815351A (en) 1974-06-11

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Application Number Title Priority Date Filing Date
US00330105A Expired - Lifetime US3815351A (en) 1972-02-10 1973-02-06 Calendar indicator for time measuring systems

Country Status (5)

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US (1) US3815351A (hu)
JP (1) JPS4890263A (hu)
CH (2) CH604230B5 (hu)
DE (1) DE2306487A1 (hu)
FR (1) FR2170989B1 (hu)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945191A (en) * 1974-01-14 1976-03-23 Zenith Radio Corporation Electronic timepiece having complementary electro-optical and electro-mechanical displays
US4087959A (en) * 1975-09-09 1978-05-09 Ebauches S.A. Driving mechanism of a member of timepiece moving intermittently
US4175372A (en) * 1976-03-16 1979-11-27 Citizen Watch Co. Ltd. Electronic timepiece
US4188777A (en) * 1976-10-04 1980-02-19 Ebauches S.A. Electro-mechanical calendar watch
US4253173A (en) * 1979-10-15 1981-02-24 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Dual display synchronization system for a timepiece
US4254490A (en) * 1978-01-31 1981-03-03 Gebruder Junghans Gmbh Electronic clock having synchronized analog and digital displays
US4261046A (en) * 1978-02-23 1981-04-07 Kabushiki Kaisha Suwa Seikosha Timepiece
US4262345A (en) * 1978-01-31 1981-04-14 Gebruder Junghans Gmbh Electronic clock having an analog display and a plurality of digital functions
US4282592A (en) * 1978-03-30 1981-08-04 Kabushiki Kaisha Suwa Seikosha Indicating member advancing mechanism
US4300222A (en) * 1976-12-03 1981-11-10 Citizen Watch Co., Ltd. Electronic timepiece
US4338680A (en) * 1976-09-28 1982-07-06 Citizen Watch Co. Ltd. Electronic timepiece
US4376991A (en) * 1980-08-18 1983-03-15 Complications S.A. Electronic watch with analogic display
US6307814B1 (en) * 1998-06-29 2001-10-23 Asulab S.A. Device including at least two coaxial wheels and means for detecting the angular position thereof and method for detecting said angular positions
US6330207B1 (en) * 1998-04-24 2001-12-11 Asulab S.A. Timepiece including a magnetic or capacitive device for detecting at least one reference angular position of a wheel of said timepiece
FR2844351A1 (fr) * 2002-09-05 2004-03-12 Denso Corp Appareil de mesure a detecteur de position d'aiguille
US20050105398A1 (en) * 2003-11-18 2005-05-19 Wolfgang Burkhardt Perpetual calendar for a timepiece
US20050276166A1 (en) * 2004-06-15 2005-12-15 Asulab S.A. Method for synchronising an analog display of a timepiece with its electronic time base
FR2884927A1 (fr) * 2005-04-22 2006-10-27 Valeo Systemes Thermiques Procede et appareil de reinitialisation d'un ensemble d'elements en rotation coaxiale obeissant a une loi de cinematique, et systemes correspondants

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH629062B (fr) * 1978-03-29 Suisse Horlogerie Piece d'horlogerie pourvue d'un dispositif de synchronisation entre un affichage analogique et un affichage numerique.
CH649189GA3 (hu) * 1981-12-28 1985-05-15

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595467A (en) * 1948-07-16 1952-05-06 Kellner Gabriel Perpetual calendar clock
US3333410A (en) * 1965-04-02 1967-08-01 Instr For Industry Inc Electronic clock-calendar
US3361973A (en) * 1964-12-11 1968-01-02 Guy M Showalter Radio alarm and timing apparatus
US3456123A (en) * 1965-03-08 1969-07-15 Miniature Elect Components Programmable digital time switching system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB517865A (en) * 1938-07-07 1940-02-12 Andre Levy Improvements in and relating to calendars or date indicators
US2439154A (en) * 1945-02-19 1948-04-06 George M Harper Jr Detachable calendar mechanism for clocks
FR1198800A (fr) * 1957-03-04 1959-12-09 Jahresuhren Fabrik S A R L Aug Horloge-calendrier
US3276198A (en) * 1964-08-26 1966-10-04 Robert A Barbera Automatic clock-calendar

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2595467A (en) * 1948-07-16 1952-05-06 Kellner Gabriel Perpetual calendar clock
US3361973A (en) * 1964-12-11 1968-01-02 Guy M Showalter Radio alarm and timing apparatus
US3456123A (en) * 1965-03-08 1969-07-15 Miniature Elect Components Programmable digital time switching system
US3333410A (en) * 1965-04-02 1967-08-01 Instr For Industry Inc Electronic clock-calendar

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3945191A (en) * 1974-01-14 1976-03-23 Zenith Radio Corporation Electronic timepiece having complementary electro-optical and electro-mechanical displays
US4087959A (en) * 1975-09-09 1978-05-09 Ebauches S.A. Driving mechanism of a member of timepiece moving intermittently
US4175372A (en) * 1976-03-16 1979-11-27 Citizen Watch Co. Ltd. Electronic timepiece
US4338680A (en) * 1976-09-28 1982-07-06 Citizen Watch Co. Ltd. Electronic timepiece
US4188777A (en) * 1976-10-04 1980-02-19 Ebauches S.A. Electro-mechanical calendar watch
US4300222A (en) * 1976-12-03 1981-11-10 Citizen Watch Co., Ltd. Electronic timepiece
US4254490A (en) * 1978-01-31 1981-03-03 Gebruder Junghans Gmbh Electronic clock having synchronized analog and digital displays
US4262345A (en) * 1978-01-31 1981-04-14 Gebruder Junghans Gmbh Electronic clock having an analog display and a plurality of digital functions
US4261046A (en) * 1978-02-23 1981-04-07 Kabushiki Kaisha Suwa Seikosha Timepiece
US4282592A (en) * 1978-03-30 1981-08-04 Kabushiki Kaisha Suwa Seikosha Indicating member advancing mechanism
US4253173A (en) * 1979-10-15 1981-02-24 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Dual display synchronization system for a timepiece
US4376991A (en) * 1980-08-18 1983-03-15 Complications S.A. Electronic watch with analogic display
US6330207B1 (en) * 1998-04-24 2001-12-11 Asulab S.A. Timepiece including a magnetic or capacitive device for detecting at least one reference angular position of a wheel of said timepiece
US6307814B1 (en) * 1998-06-29 2001-10-23 Asulab S.A. Device including at least two coaxial wheels and means for detecting the angular position thereof and method for detecting said angular positions
FR2844351A1 (fr) * 2002-09-05 2004-03-12 Denso Corp Appareil de mesure a detecteur de position d'aiguille
US20050105398A1 (en) * 2003-11-18 2005-05-19 Wolfgang Burkhardt Perpetual calendar for a timepiece
US7027361B2 (en) * 2003-11-18 2006-04-11 Timex Group B.V. Perpetual calendar for a timepiece
US20050276166A1 (en) * 2004-06-15 2005-12-15 Asulab S.A. Method for synchronising an analog display of a timepiece with its electronic time base
US7218577B2 (en) 2004-06-15 2007-05-15 Asulab, S.A. Method for synchronising an analog display of a timepiece with its electronic time base
FR2884927A1 (fr) * 2005-04-22 2006-10-27 Valeo Systemes Thermiques Procede et appareil de reinitialisation d'un ensemble d'elements en rotation coaxiale obeissant a une loi de cinematique, et systemes correspondants

Also Published As

Publication number Publication date
CH188673A4 (hu) 1977-07-15
DE2306487A1 (de) 1973-08-23
FR2170989A1 (hu) 1973-09-21
JPS4890263A (hu) 1973-11-24
FR2170989B1 (hu) 1976-07-23
CH604230B5 (hu) 1978-08-31

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