FR2653570A1 - AUTOMATIC RECLOSING DEVICE FOR RECEIVING CLOCKS; SERVED AT A MOTHER CLOCK FOR DISTRIBUTION OF TIME. - Google Patents

Abstract

Device for automatic resetting of receiver clocks comprising means (20-24) for controlling the position of the minute hand (10) and the position of the hour hand (18) at a precise moment, said means control sending signals to the electronic control means (27) of the motor (9) thus allowing the automatic individual resetting of each receiver clock. Application to networks for the distribution of hours.

Description

The invention relates to the distribution of time.

  We know that the general principle adopted in a

  time distribution is the incrementation, by each clock-

  receiver, impulses sent by a mother clock.

  These pulses are received either of the same polarity (reception

  by electromagnet), or more generally of reverse polarity

  This allows DC stepper motors to be used step by step. In such a system the registration of the receivers can only be done for the entire network, either by stopping the sending of the pulses if it is a delay to give or by sending the accelerated pulses. it is an advance to give. In no case can a receiver be recalibrated

  separately, in known automatic installations.

  The main object of the present invention is to reset the receiver clocks with current stepping motor.

  continuous, together and / or separately.

  The subject of the invention is a registration device

  automatic receiver clocks, slaved to a clock-

  mother emitting pulses comprising, for each clock receiver, a known type of motor operating in direct current with inverted pulse or not electronic means

  for controlling the motor, and mechanical means for driving

  the hands of the receiving clock by said motor, characterized in that it furthermore comprises

  means for controlling the position of the minute hand;

  and the position of the hour hand at a precise moment, the said control means sending signals to the electronic control means of the engine thus allowing

  automatic registration of each individual receiving clock

  dually. The means for controlling the position of the

  each receiver clock has a reading disc set on each needle axis to locate the zero point

  of each of them. Each reading disc contains a

  che, which passes in front of a reader when each needle is in zero position and thus twice a day for the disk hour hands, and once per hour for the disk

of the minute hand.

  In the resetting device according to the invention the electronic control means can receive

  necessary indications of a mother clock which is constantly

  by a transmitting station, but they may also receive

  directly from the indications of this post-transmitter, Which one

  the automatically. every minute the receiver clock and especially at the time of time changes by a sudden change from one hour ahead or one hour back, or by a reset to the full time in case of temporary stop

  of the mother clock for some reason.

  To better understand the invention is given below an embodiment with reference to the accompanying drawings in which: FIG. 1 is an overall diagram of the device,

  Fig.2 is a synoptic view of the mechanical part.

  Starting from a mother clock 1 is sent in an electronic system of known design 27, an indication in absolute value giving the hour and the minute, for example 8:35. - To facilitate understanding, hereinafter described

  in a very succinct manner, this electronic assembly 27.

  The indication of the mother clock arrives in the

  that eclectic to a receiving device 2, which records the transmitted time, and places it at the input of a comparator, in 3 for indication of the time "8 'in 4 for indication of the minute'535' From the other side of this comparator, a device

  electronics records the pulses that have been incrementally

to the secondary clock.

  It is assumed that the secondary clock was reset at midnight, that is, when the hour hand is in the vertical position, and the minute hand also

  in a vertical position. Since midnight, the current engine has

  Nude received a number of inverse pulses corresponding to the number of minutes that elapsed until "8:35", and these pulses caused the minute hand to complete eight turns, plus 35 minutes, and the hand hours to make a portion of a turn to indicate 8:00 am These pulses were not only transmitted to the motor 9 which makes the needles advance, but to the system.

  6 and 5 on the other side of the comparator.

  This electronic system thus recorded, in its element, eight in. which correspond to the fact of the passage of the hour "O" to the hour "8," and it recorded in part 6, eight times sixty increments, plus the thirty five in -

  crémèntations last minutes.

  Only the last increments remain

  This is because each time 6 records 60 increments, it gives an order to record an incrementation in 5, and return itself to the zero position. It follows therefore that on the electronic level, the reading of the two counters and 6 show: "8 - 35" "Between the group of compa-

  3-4, and the meter group 5-6, is placed a compara-

  7, of known type in electronics, and this element compares

  constantly the time given by the mother clock and the time given

  born at the clock-receiver. If this comparison is perfect

  (8 - 35 for 8.35) nothing happens.

  When this comparison is destroyed (example when the mother clock goes to the next minute, and indicates 8:36), the comparator will immediately give an order to the electronic generator 8 to emit an impulse which will, on the one hand, advance the motor 9 of the needles of a step, and secondly, incrementing the electronic system 5 - 6

  step, which allows you to find yourself in balance again.

  What has just been described is the case of a function

normally.

  However, sometimes the mother clock I suddenly displays an extra hour, which is the case, by

  example, the change in the time of the month of March, and the comparison

  7 states that the clock-receiver is a late hour. It then transmits an order to the generator 8 which emits as many pulses as necessary (in this case 60) to reset the secondary clock to the same position as that

  asked by the mother clock. In other words, for the comparison

  rator 7 again noted that both were in

Agreement.

  We can now assume an inverse operation

  that is, the mother clock I abruptly indicates

  one hour back, which would be the case with the change of

  re of the month of September. In this case, the comparator 7 which finds that the clock-receiver is no longer, at the time, acts as in the previous case: it causes an accelerated commissioning of the control 8 of the stepper motor 9, which will turn the clock-receiver of eleven hours to reset it to the same point as the mother clock, that is to say

  where the comparator finds that the incremental system

  tation 5-6 has reached the same level as the 3-4 control system. The electronics, however, have been studied so that if it is only a small registration less than three minutes the clockmaker will not turn twelve hours, but will remain in the waiting position for

three minutes maximum.

  This waiting position is caused by the comparison

  generator that blocks the engine emissions step by step for three minutes, and releases them as soon as the comparator finds that the clockmaker is at the same time

than the mother clock.

  The electronic assembly thus described is supplied with 220 V. current using a power supply of known model 28. The clock-receiver comprises a hand of

  10 minutes mounted on an axis 19, at the end of which is

  a slotted wheel 11 for advancing the so-called

needle 10.

  This crenellated wheel 11 is driven by a gear

  two teeth 12 connected to the rotor 13 of a motor 9. It is obvious that the crenellated wheel 11 and the two-tooth gear

  may be replaced by an ordinary gear train.

  +/- and - / + pulses sent to the bobbin

  do not advance the engine in a step-by-step system, and

  therefore rotate the needle 10.

  A gear train 14, 16 and 17 controls the

small needle 18.

  This has just been described is the normal operation of a reverse dc receiver, but this could also apply to a working receptacle.

  with a non-inverted current control apparatus.

  According to the invention on the axis of the needle of the

  19 is placed a disc 20 which has a notch 21. Once per hour this notch passes a reader 22. This notch 21 corresponds to the position of the needle 10 at point 0, that is to say when the minute hand passes by midday. On the axis 23 of the small needle 18, is also

  placed a disc 24 which carries a notch 25 whose

  is read by the reader 26. The passage in front of this reader 26 is when the little needle 18 is placed, like the other

, also at noon.

  In other words, these two notches make it possible to make a reset to zero once every twelve hours with respect to the hour hand, and once every hour with respect to the minute hand, ie moment each needle passes respectively to the

point "Midi".

  The operation of the device is as follows: In normal operation the clock-receiver advances step by step under the effect of the pulses controlled by the comparator. These pulses increment, as said above, the devices 5 and 6. However, it is necessary to ensure periodically that these increments are based on a certain starting point. As a result, a reset is made using the readers 22 and 26. This discount

  zero is done every hour for the reader 22, that is,

  to say for the minute hand, every twelve hours

  for the reader 26, that is to say for the hour hand.

  In a more concrete way, whenever the hor-

  lodge indicates an exact time (8 am - 9 am - 10 am, etc.) obligatorily

  the minute hand recalibrates to zero through

  of its cam 20, its notch 21, and its reader

22, if necessary.

  Whenever the master clock indicates twelve hours or twenty four hours, the hour hand recalculates to zero using its cam 24, its notch 25 and its

reader 26, if necessary.

  From these points of reference, we work

  then incrementally, and it is certain that no deregulation

  sustainable development is possible since periodically, for each

  two needles, a check - and a recalibration if

  care is - is made at each zero crossing, the zero, in

the present case, being "Midi".

  Thus counters 5 and 6 receive indica-

  1 of the generator 8, which indications correspond exactly to the increments that the generator 8 sends to the engine 9 of the mechanical receiver, and secondly, readers 22 and 26, which

  are intended to reset to zero, at the time of the passage of the

  checkmark, the two electronic counters 5 and 6.

  It follows that at that time, if there has been deregulation @ -

  ge in the previous hour or hours, these counters find themselves set in correct wedge with respect to the needles, and if, because of this, they are no longer in agreement with the counters 3 and 4 the comparator enters into action for

  give the necessary impetus and to the engine and

  the receiver and its counter

  be re-aligned with the master clock.

  Such an invention finds particular application

  when the clocks are radio-controlled. This control consists of using a mother clock constantly controlled by the indications given by a transmitting station (FRANCE-INTER for example for France), which automatically adjusts each minute the clock receiver, especially at the time of time changes by a sudden change from one forward or one hour backwards, or by a full time reset in case of a temporary stop of the mother clock for

any reason.

  In any case, with a device such as

  written above, the clock-receiver recalculates itself

automatically.

  According to an alternative embodiment of the invention, it is possible to condense in a single set a receiver clock and a master clock to form an independent clock

  which is powered by the sector and / or by an internal battery

  no, the mother clock being connected to an antenna and receiving the indications given by a radio transmitter-transmitter. So

  the clock, therefore the needles are always

  days at a perfectly exact time, in complete agreement

  with the indications given by the sending station.

  To illuminate the operation of the device,

  it should be noted that two main cases can be envisaged.

  In the first case, that of a receiving clock

  enslaved to a mother clock outside her, it is necessary to connect

  der the clock-receiver on the one hand to the general network controlled by this mother-clock, and on the other hand to the electric supply network, without any manual intervention, the clock

  the receiver is stalled or adjusted correctly with respect to

  box mater. In the second case, that of a set constituted by a clock; receiver and a built-in mother clock

  (connected to an antenna), connect the single set

  electricity supply network, and there is no longer any

to take care of it.

  Within a maximum of twelve hours,

  that is, when both hands are past the twelve (Midi) position, the time setting

  automatic clock on the radio will be made of her

even.

Claims (7)

R E V E N D I C A T I 0 N S   1. Apparatus for automatically resetting receiving clocks, slaved to a master clock (1) emitting   pulses, comprising for each clock receiving a   de-e type known device (9) operating in direct current with reverse pulse or not. electronic means 27 for controlling the motor, and mechanical means (29) for driving the hands (10 and 18) of the receiver clock by said motor (9), characterized in that it comprises in in addition to myeyns controlling the position of the minute hand (10) and the position of the hour hand (18) at a precise moment, said control means sending   signals to the electronic control means (27) of   (9) thus enabling the automatic registration of each   receiving clock individually.   2. Automatic clocks resetting device   receivers, controlled by a mother clock, according to the   1, characterized in that the means for controlling the position of the needles of each receiving clock comprises a reading disc (20-24) wedged on each axis.   (19-23) of the needle (10-18) to locate the zero point of each one of her.   3. Device according to claim 2, characterized in that each disc (20-24) for reading has a notch, which passes in front of a reader (22-26) when each needle is in the zero position, and therefore twice a day for the disk (24) of the hour hand, and a   times per hour for the disc (20) of the minute hand.   4. Device according to the set of claims   precedents, characterized by the fact that the means of control   sending signals to the hour (5) and minute counters.   the electronic means (27) of electronic   when a needle passes the point zero (Midi).   5. Device according to any one of the claims   tions, characterized by the fact that the clock-   mother is constantly controlled by the indications given by a radio transmitter.   6. Device according to any one of the claims   1 to 4, characterized by the fact that the electronic means   control commands are radio-controlled to a master clock.   7. Device according to any one of the   1 to 5, characterized in that the clock-receiver and the master clock are condensed in a single unit to form an independent clock which is powered by the mains or internal battery, the master clock being connected to an antenna receiving the indications given by a radio transmitter.