EP0657792A1 - Elektronischer analoger Chronograph mit Einholzeiger - Google Patents

Elektronischer analoger Chronograph mit Einholzeiger Download PDF

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Publication number
EP0657792A1
EP0657792A1 EP94119296A EP94119296A EP0657792A1 EP 0657792 A1 EP0657792 A1 EP 0657792A1 EP 94119296 A EP94119296 A EP 94119296A EP 94119296 A EP94119296 A EP 94119296A EP 0657792 A1 EP0657792 A1 EP 0657792A1
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EP
European Patent Office
Prior art keywords
chronograph
hand
counter
control circuit
time
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.)
Granted
Application number
EP94119296A
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English (en)
French (fr)
Other versions
EP0657792B1 (de
Inventor
Gabriel Mossuz
Erich Walker
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.)
ISA AG Arch
Original Assignee
Fabrique dEbauches de Sonceboz SA
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Publication of EP0657792A1 publication Critical patent/EP0657792A1/de
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Publication of EP0657792B1 publication Critical patent/EP0657792B1/de
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
    • G04F8/006—Apparatus for measuring unknown time intervals by electromechanical means running only during the time interval to be measured, e.g. stop-watch

Definitions

  • the present invention relates to an analog electronic chronograph comprising at least a first hand making a revolution in one minute, displaying seconds or fractions of a second and controlled by a first control circuit and a second hand displaying and totaling minutes and controlled by a second control circuit, the second hand progressing by one minute when the first hand has progressed by sixty seconds, and pushers capable of being actuated by the user by means of which the chronograph can be started, in gel, stopped and brought back to zero.
  • a first pusher is generally pressed at two o'clock. To stop it, press the same button again, which allows you to read the timed time. To reset the chronograph to zero, a second pusher is generally pressed at four o'clock. The hands will position themselves at noon.
  • the chronograph has a gel or split-second function - and this is the case of the chronograph making the object of the present invention - pressing the second pusher while the chronograph is in operation, immobilizes or freezes the hands at the place where they were when the second pusher was actuated.
  • the system includes a counter 1 of fifths of a second incremented by a signal at 5 Hz. It should be noted that it could be a seconds counter with power supply at 1 Hz. Counter 1 increments another minute counter totalizing minutes 2 every minute.
  • counters 1 and 2 play the role of continuously incremented memories, the first by the time base signal at 5 Hz, the second by a signal of one minute.
  • the system also comprises two blocks 3 and 4 respectively called control of second hand and totalizer control. Each of these blocks actually contains a control circuit which acts respectively on the seconds hand 10 and minutes 20 and a counter which is only incremented when the rotors driving the second hand 10 and the hand 20 respectively are requested by a pulse on the coil (s) of the stepper motor (s).
  • the state of counter 1 and that of counter 3 are checked at all times by a comparator 5, the output of which takes the value 1 if these states are identical or the value 0 otherwise.
  • the state of counter 2 and that of counter 4 are controlled in the same way by a comparator 6.
  • the output of comparator 5 controls a switch 7 which brings to the second hand control input 3, ie the 5 Hz signal if the output of comparator 5 is at state 1, that is a fast frequency signal, 32 or 50 Hz, if said output is at state 0.
  • the output of comparator 6 controls a switch 8 which brings on l totalizer control input 4, either the one-minute output of the second hand control if the output of comparator 6 is at state 1, or a fast frequency signal, 16 or 25 Hz, if said output is at l 'state 0.
  • Control circuits 3 and 4 can be blocked by a split or freeze signal.
  • the freeze function When the freeze function is started, the split signal is at state 0 and circuits 3 and 4 are blocked and remain so until, on request, this signal goes to 1.
  • the control circuits 3 and 4 then receive their fast signals by the switch 7, since the content of the counter 1 is different from that of the counter 3. It is then the catch-up function which acts until the comparators 5 and 6 return to state 1 themselves, which occurs when the contents of counters 1 and 3, respectively 2 and 4, are equal.
  • the hands 10 and 20 then return to their normal course.
  • the document GB-A-2 005 875 describes a chronograph equipped with a first seconds hand advancing in steps of one second and making a revolution in one minute and a second minutes hand making a revolution in thirty minutes and advancing in steps of a minute. These two needles are driven by a single first motor.
  • the chonograph further comprises a third hand of hundredths of a second advancing in steps of a hundredth and making one revolution in one second. This third needle is driven by a second motor independent of the first.
  • the second hand (and therefore the minute hand) and the hundredths of a second hand are stopped when the chronograph is frozen. None therefore suggests that during the freezing of the chronograph, only the hundredths hand would continue to run while the other two hands would be stopped. Even if that was how then to have time to read an intermediate time, the hundredths hand continuing to rotate?
  • the analog electronic chronograph of the invention is characterized in that means are used so that, when the chronograph is frozen, at least the second hand totaling the minutes continues to display and total the minutes to get attention from the user that the chronograph is running and not stopped.
  • Figure 1 shows, seen from the front, the dial and the chronograph controls according to one embodiment of the invention. It essentially comprises a central second hand 10 or second hand evolving on a dial 53 carrying divisions of seconds 31 and divisions of seconds 30, a minute totalizer consisting of a hand 20 evolving on a dial 55 carrying divisions of minutes 33, and of the first and second pushers 51 and 52. It goes without saying that the chronograph could also include an hour totalizer which has not been shown here.
  • the chronograph of FIG. 1 is completed by a timepiece having hour 11 and minute hands 12 a small second hand 13 evolving on a dial 54 carrying divisions 34, and a time setting crown 50 This timepiece is driven by a conventional stepping motor and does not fall within the object of the present invention.
  • the central second hand or first hand 10 rotates in one minute while the totalizer of minutes or second hand 20 advances by one minute when the first hand has progressed by sixty seconds.
  • the first and second needles are driven independently of each other, either each by a stepping motor or by a single stator motor but having two rotors capable of being driven separately, depending on the pulse shapes provided to the spool, as described in document CH-B-675 940.
  • the chronograph is started by pressing the pusher 51 for the first time.
  • the first hand 10 advances in steps of one fifth of a second and the second hand 20 in steps of one minute each time the first hand has made a revolution .
  • the chronograph is stopped by pressing the push-button 51 once again.
  • the timed time can then be read.
  • the stop function at the same time interrupts the incrementation of the internal counters.
  • a new press on push-button 51 makes it possible to start timing again from the time indicated during the stop.
  • the chronograph is reset by pressing the second button 52 when the chronograph is stopped. Hands 10 and 20 return at noon at an accelerated speed.
  • the chronograph is frozen.
  • means are used which will appear in the following description so that, when the chronograph is frozen, at least the second hand 20 continues to display and totalize the minutes, the first hand 10 being either stopped or displaying another unit than the fifth of a second, depending on the mode of execution adopted and which will be discussed below.
  • the fact, for the second needle 20, to continue to display and totaling the minutes draws the user's attention to the fact that the chronograph is still in operation and not stopped.
  • the catch-up function is activated by pressing the second pusher 51 again.
  • the first hand 10 is driven at accelerated speed to then indicate the time it would have indicated if the gel function had not been ordered, while immediately continuing its course in normal operation.
  • a first embodiment of the invention provides that in gel function the first hand or central second hand 10 is stopped and that the second hand 20 continues to display and totalize the minutes.
  • the first and second needles are each driven by a motor comprising a rotor, a stator and a coil. The two motors are therefore completely independent of each other and their rotor advances when the corresponding coil is stressed by a pulse. This embodiment will now be explained using the partial electrical diagram in FIG. 4.
  • the chronograph has a first seconds counter 1 incremented by a time base signal of 5 Hz.
  • the first hand advances in steps of one fifth of a second.
  • this signal could be 1 Hz, in which case the needle would progress in steps of 1 second.
  • the chronograph further includes a second counter 3 which is incremented at each step of the first needle 10, that is to say incremented only when the rotor supplying the needle is requested by a pulse.
  • the needle 10 is driven by a first control circuit 3 forming part of the same block as that containing the second counter.
  • the control circuit 3 is controlled by the time base signal of 5 Hz or by a fast frequency signal, for example of 32 Hz, according to that a switch 7 is respectively in a first position 60 for which the chronograph is in normal operation or in a second position 61.
  • the diagram in FIG. 4 also shows that the chronograph comprises a comparator 5 whose role is to compare the contents of the first and second counters 1 and 3, in particular when the chronograph is in freeze function.
  • the comparator output signal is equal to 1 if these contents are identical and equal to 0 otherwise.
  • command 3 of needle 10 is blocked by a split signal in state 0. Needle 10 is stopped.
  • the split signal goes to state 1 and the command 3 receives a signal at 32 Hz, since the comparator 5 has actuated the switch 7 on the second position 61, the contents of the first and second counters being different and the output signal of comparator 5 being in state 0.
  • the first needle is therefore driven at accelerated speed until the contents of the first and second counters 1 and 3 are equal, in which case comparator 5 changes to l state 1 and the switch 7 in position 60.
  • the hand 10 displays the time it would have indicated if the gel function had not been controlled, then immediately resumes its normal operation at 5 Hz.
  • FIG. 4 shows that the minutes counter 2, the comparator 6 and the switch 8 present in FIG. 3 have been deleted, the block 4 containing only a second control circuit 4, without a second counter 4, directly controlled by the first counter 1 each time the latter has counted sixty seconds.
  • the control of the first needle or second hand 10 is blocked, while the totalizer control circuit 4 is incremented every minute by the counter 1 of the fifths of a second, the latter being always incremented by the signal at 5 Hz.
  • a second embodiment of the invention provides that the first central hand or second hand 10 progresses in steps of one fifth of a second when the chronograph is operating normally and in steps of one minute when it is frozen to provide a totalizer hours, the angular progression of said first hand being the same for both functions, and that the second hand continues to display and total the minutes.
  • the first and second needles can be driven either by two completely independent motors, or by a motor comprising two rotors, but a single stator and a single coil according to the document CH-B-675 940 cited above. This embodiment will now be explained using the partial electric diagram in FIG. 5.
  • the chronograph comprises a first counter 1 of fifths of a second incremented by a time base signal of 5 Hz.
  • the first hand therefore advances in steps of one fifth of a second.
  • It also includes a second counter 3 which is incremented at each step of the first needle 10.
  • the needle 10 is driven by a first control circuit 3 forming part of the same block 3 as that containing the second counter.
  • the control circuit 3 is also controlled by the time base signal of 5 Hz or by a fast frequency signal of 32 Hz, depending on whether a first switch 7 is respectively in a first position 60 for which the chronograph is in normal running or in a second position 61.
  • the chronograph includes a comparator 5 whose role is to compare the content of the first and second counters 1 and 3, especially when the chronograph is in freeze function.
  • the comparator output signal is equal to 1 if these contents are equal and equal to 0 otherwise.
  • FIG. 5 differs from that of FIG. 4 by the fact that the circuit comprises a second switch 9 capable of supplying the control circuit 3 - when the first switch 7 is in position 60 - either by the time base signal at 5 Hz, if the second switch 9 is in the first position 70 (normal operation of the chronograph), or by a signal 54 if the second switch 9 is in the second position 71.
  • the freezing of the chronograph causes switch 9 to switch to position 71 and therefore supplies the control circuit 3 with signal 54, signal generated by the first counter 1 each time the latter has counted sixty seconds.
  • first central hand or second hand 10 receives signals every minute when the chronograph is frozen and that instead of being stopped, as is the case in the first embodiment, it progresses by steps of 1 minute to offer a totalizer of hours over five hours in total.
  • the diagram in FIG. 5 shows that the minute counter 2, the comparator 6 and the switch 8 present in FIG. 3 have been deleted, the block 4 containing only a second control circuit 4 without second counter, directly controlled by the first counter 1, each time the latter has counted sixty seconds. Also in this version, the minutes totalizer (over thirty minutes) is activated normally when the chronograph is frozen.
  • FIG. 1 and its enlarged part represented in FIG. 2 shows how the dials 53 and 55 of the chronograph appear, executed according to the second embodiment of the invention.
  • the first central hand or second hand 10 rotates on the dial 53 which has divisions of seconds 31 and divisions of fifths of a second 30 when the second hand is in normal operation.
  • the seconds 31 are identified by the inscriptions 15, 30, 45 and 60 carried towards the inside of the dial.
  • the chronograph When the chronograph is arranged in gel, the second hand 10 displays minutes.
  • division 41 (FIG. 2) indicates a fifth of a second when the chronograph is operating normally and a minute when it is frozen.
  • divisions 42, 43 and 44 indicate the second, third and fourth fifths of a second when the chronograph is operating normally and the second, third and fourth minutes when it is arranged in gel.
  • the reference 31 ( Figure 2) indicates respectively one second and five minutes.
  • the references 32 carry whole hour digits: 1 to 5 hours, written towards the outside of the dial 53.
  • the second hand 20 turns on a small dial 55 and displays the minutes over thirty minutes with thirty divisions 33, which the chronograph either in normal operation or in gel.
  • the first hand will start beating the minute from any place and if this gel is done at another time than 'at noon, the 32 hour divisions will not correspond to any reality.
  • the hand 10 then only indicates that the chronograph is in gel and not stopped, jumps occurring every minute. As the gel function is already signaled by the second needle 20, one can imagine stopping the first needle 10 if the gel is done manually.
  • the chronograph must be equipped with an automatic freezing system intervening after an integer number of minutes, the first control circuit 3 being arranged to advance the second hand by a number of steps equal to this whole number, from the automatic freezing of the chronograph. For example, if the automatic freezing occurs four minutes after the start of the chronograph, the second hand, after having traveled four times around the dial to find itself at noon, advances again by four divisions 30 to stop at division 44 from from which the second hand advances one step per minute. From this moment, the second hand displays the hours 32 printed on the dial.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Electromechanical Clocks (AREA)
EP19940119296 1993-12-13 1994-12-07 Elektronischer analoger Chronograph mit Einholzeiger Expired - Lifetime EP0657792B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH369593 1993-12-13
CH3695/93 1993-12-13

Publications (2)

Publication Number Publication Date
EP0657792A1 true EP0657792A1 (de) 1995-06-14
EP0657792B1 EP0657792B1 (de) 1998-04-15

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EP19940119296 Expired - Lifetime EP0657792B1 (de) 1993-12-13 1994-12-07 Elektronischer analoger Chronograph mit Einholzeiger

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EP (1) EP0657792B1 (de)
DE (1) DE69409612T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0996042A1 (de) * 1998-04-21 2000-04-26 Seiko Epson Corporation Uhr und zeitmessverfahren
JP2015206771A (ja) * 2014-04-23 2015-11-19 セイコーエプソン株式会社 時間計測装置
JP2015206770A (ja) * 2014-04-23 2015-11-19 セイコーエプソン株式会社 アナログ電子時計

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2005875A (en) * 1977-10-04 1979-04-25 Seiko Instr & Electronics Improvements in or relating to electronic chronographs
GB2124803A (en) * 1982-06-07 1984-02-22 Suwa Seikosha Kk Improvements in or relating to electronic analog timepieces
JPS6247575A (ja) * 1985-08-28 1987-03-02 Casio Comput Co Ltd ストツプウオツチ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2005875A (en) * 1977-10-04 1979-04-25 Seiko Instr & Electronics Improvements in or relating to electronic chronographs
GB2124803A (en) * 1982-06-07 1984-02-22 Suwa Seikosha Kk Improvements in or relating to electronic analog timepieces
JPS6247575A (ja) * 1985-08-28 1987-03-02 Casio Comput Co Ltd ストツプウオツチ装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 236 (P - 601) 8 April 1987 (1987-04-08) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0996042A1 (de) * 1998-04-21 2000-04-26 Seiko Epson Corporation Uhr und zeitmessverfahren
EP0996042A4 (de) * 1998-04-21 2004-03-17 Seiko Epson Corp Uhr und zeitmessverfahren
JP2015206771A (ja) * 2014-04-23 2015-11-19 セイコーエプソン株式会社 時間計測装置
JP2015206770A (ja) * 2014-04-23 2015-11-19 セイコーエプソン株式会社 アナログ電子時計

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Publication number Publication date
DE69409612T2 (de) 1998-11-12
DE69409612D1 (de) 1998-05-20
EP0657792B1 (de) 1998-04-15

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