EP0777165A2 - Tragbarer elektronischer Zeitgeber mit zentralem Sekundenzeiger, insbesondere Armbanduhr - Google Patents

Tragbarer elektronischer Zeitgeber mit zentralem Sekundenzeiger, insbesondere Armbanduhr Download PDF

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Publication number
EP0777165A2
EP0777165A2 EP96118865A EP96118865A EP0777165A2 EP 0777165 A2 EP0777165 A2 EP 0777165A2 EP 96118865 A EP96118865 A EP 96118865A EP 96118865 A EP96118865 A EP 96118865A EP 0777165 A2 EP0777165 A2 EP 0777165A2
Authority
EP
European Patent Office
Prior art keywords
hand
minute
center
hands
seconds
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.)
Withdrawn
Application number
EP96118865A
Other languages
English (en)
French (fr)
Other versions
EP0777165A3 (de
Inventor
Michiel Groothuis
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.)
MTM Manufacture et Technologie du Mouvement SA
Original Assignee
MTM Manufacture et Technologie du Mouvement SA
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 MTM Manufacture et Technologie du Mouvement SA filed Critical MTM Manufacture et Technologie du Mouvement SA
Publication of EP0777165A2 publication Critical patent/EP0777165A2/de
Publication of EP0777165A3 publication Critical patent/EP0777165A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • G04C3/146—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor incorporating two or more stepping motors or rotors

Definitions

  • the present invention relates to a portable electronic timepiece with central seconds hand, in particular a wristwatch.
  • the object of the present invention is to provide a portable timepiece which has functions similar to those of station clocks in which the second hand turns in less than a minute, stops at twelve o'clock until 'until the minute has passed, then starts again at the same time as the hour and minute hands which advance by the value of one minute.
  • Fig. 1 is a plan view of a wristwatch with a second hand at the independent center.
  • Fig. 2 is an elevational view of the movement of this watch, on a larger scale, with some elements of the box in which this movement is housed, partially shown.
  • Fig. 3 is a plan view of this movement, on an even larger scale.
  • Fig. 4 is a section along the line IV-IV of FIG. 3, on a larger scale.
  • Fig. 5 is a section along the line V-V of FIG. 3 to the scale of FIG. 4, and
  • Fig. 6 is a very schematic representation of the entire electrical part of the room.
  • the watch shown in fig. 1, generally designated by 1, comprises a dial 2 having an hour turn 3 and a minute turn 4 having the general appearance of those of station clocks.
  • This watch includes an hour hand 5 and a minute hand 6 as well as a second hand in the independent center 7 which has a circular part 7 a pronounced of a palette, as is the case of the second hands of the most station clocks.
  • This watch includes a manual time setting crown 8.
  • the electronic movement of this watch housed in a box of which only the crystal, designated by 9, and the bottom, designated by 10, have been partially represented in FIG. 2, comprises a main metal plate 11, a plastic casing 12, a printed circuit 13, a spacer 14 and a metal covering plate 15.
  • the central part, designated by 16, of the movement as shown in FIG. 2 shows, schematically, the mechanical part thereof, that is to say the motors and cogs which will be described later.
  • motors which actuate the needles, as well as these motors themselves, which are stepping motors.
  • the rotor of the motor 18, designated 20 (Fig. 4) is integral with a pinion 20 a driving a gear train comprising three mobiles, designated respectively by 21, 22 and 23, the pinion of this mobile last designated by 24, being engaged with the center or minute wheel, making a turn at the hour, designated by 25, carrying the roadway, designated by 26, itself carrying the minute hand 6.
  • the hand of the hours 5 is carried by the barrel of the hour barrel wheel, designated by 27, connected to the carriageway 26 by a timer reference of which only a part of the wheel, designated by 28, is visible in FIG. 4.
  • the gear train of the motor 18 does not pass through the center of movement but goes around it.
  • the motor 18 and the gear train 21-22-23 are carried by a cage-shaped frame constituted by a bridge 29 and by a intermediate bridge 30. It should be noted that the shaft, designated by 31, of the mobile 23 crosses the intermediate bridge 30, the pinion 24 being located on its end situated beyond said bridge so as to be at the height of the center wheel 25. Thus, the entire module constituted by the motor 18 and its gear train is situated in the height of the main cage of the movement limited by the plate 11 on the one hand and by the bridge 29 on the other hand .
  • the motor 19 for controlling the independent seconds hand 7 its rotor, designated by 32 (fig. 5), is integral with a pinion 33 driving a gear train comprising two mobiles 34 and 35.
  • the mobile 35 does not include a wheel and a pinion, like the usual mobiles, but two wheels, designated by 36 and 37, superimposed, the wheel 37 being engaged with the seconds wheel in the center, designated by 38, including the tigeron, designated by 39, carries the second hand 7.
  • the motor 19 and the gear train which it drives is entirely carried by the cage formed by the plate 11 on the one hand and by a bridge 40 on the other hand.
  • the manual time-setting mechanism comprises a time-setting rod 41 (fig. 3) carrying the crown 8 and which acts on the timer return 28 to allow the manual time setting of the hands. hours and minutes.
  • This rod 41 also actuates electrical contacts.
  • the watch further comprises a contact 42 (fig. 3) actuated by a control push-button 43 which produces pulses serving to bring the seconds hand 7 back to zero, that is to say in a position where it is directed around twelve o'clock, and to "initialize" the piece.
  • the watch control circuit shown in fig. 6, and the time-setting mechanism, which is linked to this circuit, are arranged in such a way that when the rod 41 of the time-setting mechanism occupies its pushed position, it is inoperative. Similarly, when the rod occupies this pushed position, the pusher 43 is also inoperative. On the contrary, when the rod 41 of the time-setting mechanism is pulled, it allows the hours and minutes hands to be set to the time. In this position of the rod, a pressure exerted on the pusher 43 brings the second hand 7 to zero. One could foresee the case where the mere fact of bringing the rod 41 into its pulled position produces the return to zero of the second hand. In this case, however, it will nevertheless be necessary to press the push-button 43 to "initialize" the watch.
  • the control circuit is arranged in such a way that the motor 19 drives the seconds hand 7 at the rate of one revolution per 59 seconds. At the end of this round, the second hand stops for one second and then starts again, the minute having elapsed.
  • the motor 18 driving the hour hands 5 and minutes 6, it acts intermittently producing an advance of these two hands, corresponding to one minute, each time the second hand starts again after its successive stops at the end of the turn.
  • the time indicator functions of this watch are similar if not identical to those of a station clock whose second hand turns in a little less than a minute, stops and then restarts once the minute has passed , the hour and minute hands intermittently advancing by the value of one minute at each step.
  • the means used to control a station clock are quite different from those used in this portable watch since, in station clocks, these are secondary clocks controlled by a mother clock whereas, in this case, it is an electronic watch whose motors are controlled by a programmed circuit comprising a timepiece constituted by a quartz oscillator.
  • the electronic circuit of the watch in particular the main integrated circuit, for controlling the motors, with microprocessors, can be produced in different ways.
  • the two motors 18 and 19 are controlled by a circuit 44 connected to the main integrated circuit with microprocessors IC, designated by 45. All the electrical contacts actuated either by the rod 41 or by the pusher 43, have been designated by 46 .
  • the circuit includes a supply battery 47, a quartz oscillator 48, a voltage adapter 49, a counter 50, a pulse program 51, an instruction decoder 52, a random access memory RAM (Random Access Memory) 53 , an address decoder of this RAM 54, a ROM (Read Only Memory) 55, an address decoder 56 of the ROM memory and a circuit 57 for input of the pulses produced by the contactors 46.
  • a supply battery 47 a quartz oscillator 48, a voltage adapter 49, a counter 50, a pulse program 51, an instruction decoder 52, a random access memory RAM (Random Access Memory) 53 , an address decoder of this RAM 54, a ROM (Read Only Memory) 55, an address decoder 56 of the ROM memory and a circuit 57 for input of the pulses produced by the contactors 46.
  • ROM Read Only Memory

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
EP96118865A 1995-11-28 1996-11-26 Tragbarer elektronischer Zeitgeber mit zentralem Sekundenzeiger, insbesondere Armbanduhr Withdrawn EP0777165A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH3374/95 1995-11-28
CH337495A CH689956A5 (fr) 1995-11-28 1995-11-28 Pièce d'horlogerie électronique portable à aiguille de secondes au centre, notamment montre-bracelet.
CH337495 1995-11-28

Publications (2)

Publication Number Publication Date
EP0777165A2 true EP0777165A2 (de) 1997-06-04
EP0777165A3 EP0777165A3 (de) 2000-07-19

Family

ID=4254582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118865A Withdrawn EP0777165A3 (de) 1995-11-28 1996-11-26 Tragbarer elektronischer Zeitgeber mit zentralem Sekundenzeiger, insbesondere Armbanduhr

Country Status (2)

Country Link
EP (1) EP0777165A3 (de)
CH (1) CH689956A5 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS557662A (en) * 1978-07-04 1980-01-19 Seiko Epson Corp Crystal watch of analog chronograph
CH658765GA3 (de) * 1984-04-03 1986-12-15
JPS6173085A (ja) * 1984-09-18 1986-04-15 Citizen Watch Co Ltd クロノグラフ付電子時計
CH686106B5 (fr) * 1993-03-23 1996-07-15 Ebauchesfabrik Eta Ag Montre-chronographe avec indicateur de quantième.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
EP0777165A3 (de) 2000-07-19
CH689956A5 (fr) 2000-02-15

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