DE2117756C2 - Digital time display device - Google Patents

Description

The invention relates to a digital time display device with an arrangement for inputting Time appointments, with a timing arrangement, a memory for the recording of several time appointments (Appointment memory) and an input device for entering the time appointments are provided and wherein the time display device emits a signal when a time is reached.

From the Siemens publication "Electrical Clock Systems", order no. 1-2450-019, Jan 1966, p. 28 to 30, a time display device with an input device for time appointments is already known, the one Has memory for this Zeillermine. A master clock serves as the time display, which when reached a time stamped on a punched tape with a punching device emits a signal. However, such a time display device is not suitable for those cases in which the time appointments are in their order should be entered arbitrarily and for which deletion and re-entry at any time a time must be possible.

The object of the invention is to develop a time display device based on this prior art create which does not have the above limitations and in which the input device is designed so that a simple input of the time and the identification of the appointment is possible is.

The invention solves the above-mentioned Aufrahe in that the input device as a keyboard door is designed, with which the entry of the appointment time and the address, the storage space in the Appointment memory takes place in numerical form and with which the deletion of the appointment signal as well the appointment memory can be made, and that a comparator is also provided, which the current time of the timing arrangement with the time appointment stored in the appointment memory compares.

A preferred further embodiment of this time display device provides that when there is a match of the current time and time, the comparator sends a signal to a downstream arrangement that shows the number of the entered appointment on a display

Such a time display device can be used with advantage, for example, in offices, where at one Day a larger number of time appointments must be observed, but the person concerned through a corresponding signal would like to be made aware of the individual appointments. As another To facilitate this, it is useful to provide that a display shows which of the dates entered are. When using such a time display device, it is advisable to to draw up a list of the appointments to be observed on a certain day and these appointments by means of corresponding identifications, which are entered into the time display device at the same time, from one another to distinguish.

Such a time display device is, among other things, also for use in laboratories, in production, can be used with advantage when carrying out experiments etc.

In a preferred development of this keyboard it is provided that it has a numeric keyboard Numerical entry of the time of the appointment and the corresponding address (number) of the memory location has in the appointment memory and also buttons for deleting the appointment on the display and for deleting the appointment memory ..

The invention is explained in more detail below using an exemplary embodiment with reference to the drawing. It shows

F i g. 1 in a block diagram; mains powered electronic clock with display,

F i g. 2 shows in a block diagram the electronic arrangement for inputting and processing the Events,

F i g. 3 an indication of how the arrangements according to FIGS. 1 and 2 are connected to each other,

F i g. 4 shows a circuit arrangement that enables the comparison between the current time and the content of the appointment memory,

F i g. 5 shows a pulse diagram to explain the mode of operation of the circuit arrangement of FIG. 4th

F i g. 6 shows a circuit arrangement for the appointment output memory,

7 shows a circuit arrangement for manually undertaking a time correction.

In Fig. 1 is a clock generator 1 shown which is connected to the mains frequency to clock pulses UT to control the electronic! Clock and clock pulses T emit to control the entire time display device. These clock pulses U ' are in a minute clock generator 2, which consists of a counter that counts up to number 3, in pulses with a time interval v <

squat for exactly one minute. The minute cycle arrangements are called by clock pulses Γ generator 2 is followed by a counting arrangement 3, which is controlled by the clock generator 1 (Fig. 1). The Parallclaus consists of four counters working in a network, the serial converter 14 converts the one-minute, the tens-minute, the information pending in parallel to its inputs in one-hour and the tens-hour. Each 5 presents serial information and outputs it via one of these counters, counts a maximum of one decade, in the case of output line 16 to a subordinate date in the tens of minutes or tens of hours only input memory 17. The parallel-serial converter 14 to 6 or to 2, and also outputs a signal via a line 18, which carries a pulse of four line multiples in the BCD code, to the date input memory 17 at its output. The counter arrangement 3 is bound to a wall. The address comparator 15 is connected to the serial converter via the line 18 as well as a further conductor arrangement 4, which contains four parallel connections, and this is connected to the total time input memory 17. The latter 16 lines of incoming parallel information has a storage capacity for an appointment. Because that converts to serial information. This parallel time via the ten key (key contact 11) serial converter is controlled by the clock pulse sequence 7 15 by a total of four key presses (one of the clock generator the hours) is entered digitally, and the decimal on four parallel lines, on each line itself binary converter 13 converts four serial, incoming information into a code suitable for the impulses with each button actuation, thus 16 in the display arrangement with four button actuations and sent to ao pulse is generated, which forwards a downstream driver stage 6 through the I * arallels serial converter. transformed into 16 serial pulses, the

The downstream display arrangement 7 contains four appointment memories 17 with a storage capacity of

Display tubes, which are connected to 16 bits. Subordinate to the latter is the intrinsic

be operated together with a counting stage and the borrowed appointment memory 20, which contains a total of ten appointments

Minutes (ones and tens) and the hours (one can save as mine and thus a storage capacity

and tens). tat of 160 bits. This appointment memory 20

Furthermore, a time correction device 8 is provided as a conventional dynamic circulating memory which forms 9 by means of a key contact, ie its memory content can be switched on by the clock. The time correction or generator 1 intermittently indexed leaves the timing of the clock is four KEYER 30 output 20α the circulating memory and is made through a contact 10, which device to the input line 20c in a known manner to the input 20 b include the time display device and returned.

each of which a counter of the counter arrangement 3 trains- To determine the memory locations for the individual are arranged. This time correction device sees appointments in the appointment memory 20 and serves as a reference four logic counters21 (Fig. 1) to be described in more detail later, which, although not directly see circuits with the help of which the minute cycle is connected to the appointment memory 20 via the encoder made ineffective and each counter of the address comparator 15 and the date input counter arrangement 3 when one of the key memory 17 is actuated, the time of the writing of the contacts 10 in each case switched by one level memory content of the appointment input memory 17 to can be. With this time correction device 40, the corresponding memory location of the appointment can be stored thus controls the electronic clock precisely to the time chers 20. This reference counter is used by the a comparison clock can be set. Is the Zeit- Taktgeneratori controlled and counts up to Correction ended, the key contact 9 is opened, number 160, this counting in ten cycles of each and the minute clock 2 switches the counter 16 bits takes place Each of the ten cycles is one of the arrangement 3 minute by minute, resulting in a 45 ten memory locations of the appointment memory 20 assigned minutes Change of the counter reading on the net. The output of this reference counter 21 is with Display arrangement 7 leads. the address comparator 15 connected. He lies outside

In Fig. FIG. 2 also shows the arrangement for inputting the terms on a transducer arrangement 22 (FIG. 1)

mine shown. It is a ten-parallel-series converter, not shown, which consists of the parallel

Keyboard available, which has ten key contacts to 50 information of the counter arrangement 3 serial information

are ordered. Mations generated to represent these ten contacts

is denoted by 11 with a corresponding key contact with 23 is a comparator is referred to, which has a net. The key contact 9 is actuated via a further key one-bit comparison of the one at the output of the transducer of the key panel. The key contacts 10 arrangement 22 appearing with the current time, however, are further switching contacts of the ten key 55 the memory content (the dates) of the appointment contacts 11 of the numeric keypad, which only takes effect memory 20 also makes this comparator 23 sam when the key contact 9 is over the ent- is at its input 23 a the information that the speaking key was pressed. Supplied to the BUMPS Reterenzzählers 21 Furthermore has diesel tableau further comprising a further button is provided to comparator an input for dian clock Γ of the clock switch for inputting the address of the entered 60 the generator 1. At its output 23 b are the VerTermins used and a key contact 12 actuated. The same 23 then emits a signal when the time is mil

The total of ten key contacts 11 is one of the ones stored in the appointment memory 28

Downstream decimal-binary converter 13, which dates coincide. This output signal wire

a conversion in a downstream acoustic signal generator 24 from the key contact pulses

Impulse of the BCD code carries out this decimal 65 and can also, if automatically «

Binary converter has four output lines, the par functions triggered by the relevant date

allel to a parallel-to-serial converter 14 and a line 25 to data remote control

Address comparator 15 lie. These two final processing 26 are supplied. At output 23 1

2 I Γ / 7öb

des compares «23 is also an appointment output memory 27 connected to which the information from the reference counter 21 is also supplied. This Appointment output memory can be activated by a key contact 28, which is assigned to another key on the key panel, can be deleted. The exit of the appointment output memory 27 to your the information is in the BCD code, is finally via a line 29 to the converter 4 of the electronic Watch connected.

All lines, which signals in-. Carry out BCD code and these in parallel on a multiple line pass on are in the Fi g. 1 and 2 each shown with only one line in order to simplify the To ensure sound image. AHe these lines are, however, by a multiple corresponding Number 4 marked.

In the following, the mode of operation of the FIG. 1 and 2 described arrangement explained will. By the clock generator 1, the minute contact generator 2 and the counter arrangement 3 is in the manner already explained on the display arrangement? the real time is continuously displayed. By pressing the numeric keypad, the corresponding key contacts 11, the decimal-binary converter 13 and the parallel series converter 14 a four-digit appointment time in entered the appointment memory. Now the address key is actuated and via the key contact 12 of the address comparator 15 prepared and at the same time the parallel serial converter 14 blocked. By pressing one of the keys on the numeric keypad again, the number (1 to 10) of the corresponding Date entered and in the address comparator with the information from the reference counter 21 compared. This is done in such a way that each of the ten cycles of the reference counter 21 corresponds to a corresponding bit sequence, which is also used bit-by-bit with that in the address comparator Bit sequence present address is compared. As soon as the agreement of the bit sequence of a cycle of the reference counter 21 is determined with the entered address, the address comparator 15 transfers the lines 19 and 18 send a corresponding signal to the schedule input memory 17, which as a whole lasts for sixteen bit times and causes the memory contents of the appointment memory to be transferred to the Appointment memory 20 is overwritten. There is between the reference counter 21 and the appointment memory 20, As already mentioned, a synchronism such that the «th cycle of the reference counter also corresponds to the η-th storage space in the appointment memory 20 corresponds. In this way it is ensured that when keyed in for example the address 5, the relevant appointment also to the 5th memory location of the appointment memory 20 got.

The memory content of the schedule memory 20 is, as already described, continuously switched on by the clock generator 1 and comes back from the output 20 α of the memory to the input 20 b . In addition, the output signal of the schedule memory 20 is also fed to the comparator 23. A comparison with the current time is now made there. Since the time each minute remains a constant and T the clock frequency of the frequency generator for ^6s tors is 2OkHz example, the content can during each minute several times of the forward memory 20 are compared with the time. Since the current time is available as serial information and the memory content of the appointment memory 20 is also output serially, a bit-by-bit comparison is carried out in the comparator 23 and, if the current time and appointment match, a signal is generated at output 23 b which is sent to the acoustic signal generator 24 generates an acoustically perceptible signal. In addition, this signal reaches the appointment output memory, which uses this signal together with the information from the reference counter to store the number of the reference counter cycle in which a correspondence between the current time and the appointment was found in the appointment memory 20 in a memory arrangement. In the above example, the number 5 is thus stored in the appointment output memory and passed on to the converter arrangement 4. In addition to the parallel-serial converters already mentioned, the converter 4 contains a locking circuit which is triggered by a signal from the appointment output memory 27 and has the effect that all information coming from the counting arrangement 3 is suppressed and the time on the display arrangement 7 disappears. This blocking circuit, however, lets the signal of the appointment output memory 27 reach the display arrangement 7 via the converter 4, the transcoder 5 and the driver stage 6, so that the number of the appointment entered appears there at the same time as the acoustic signal already mentioned. The arrangement can now be made so that this appointment number disappears again by actuating the key contact 28 and corresponding deletion of the appointment output memory or that an arrangement (not shown) automatically deletes the appointment output memory after one minute. As soon as the appointment output memory is deleted, the blocking circuit in the converter 4 is released again, and the current time appears again on the display arrangement 7. The appointment memory can be deleted again by entering new appointments.

The circuit arrangement of the comparator 23 is shown in FIG. The serial information coming from the converter arrangement 22 and characterizing the current time is at one input 231 α of an exclusive-OR gate 231; the serial information coming from the schedule memory 20 is at the second input 231 b. The output of the exclusive-or gate is connected to the reset input of a bistable flip-flop 232. The signal 25 which characterizes the respective beginning of a cycle of the reference counter 21 is fed to its secondary input. The set output of this flip-flop is connected to one input of an AND gate 233, at the other inputs of which the clock T of the clock generator 1 and the information from the reference counter 21 in the form of four signals A, B, C and C are present.

The output of the AND gate 233 is at the set input of a fiip-flop 234, at its wager A signal Z then appears if there is a match between the time and the appointment will.

The mode of operation of this circuit arrangement will now be described in connection with FIG. 5 will be explained. There are the pulse trains of the clock T de clock generator and the pulse trains derived from this clock A, B, C, D and D of the reference

509 685 / 43C

Counter 21 shown. From this pulse diagram it can be seen that after every 15 full clocks (pulse train A) the clock signal and the signals A,

B, C and D are present and therefore indicate the beginning of a new cycle with their falling edges. To control the flip-flop 232 , the signal Ό is used, the rising edge of which occurs at the beginning of a new cycle.

The flip-flop 232 is thus set by the Signs'iJ at the beginning of each new cycle and outputs a signal to the AND gate 233 . If there is no correspondence between the current time and an appointment in the appointment memory 20, a signal is generated at the output of the exclusive-OR gate 231 , which resets the flip-flop 232 and the signal at its output, before the cycle in question has ended disappears. If, on the other hand, there is a match, at the end of the cycle if signals A, B,

C, D and T the AND gate 233 is switched through and a signal Z is generated at the output of the flip-flop 234 , which appears at the output 23 b of the comparator 23 and signals the agreement in the manner already described.

In Fig. 6 shows the arrangement of the schedule output memory 27. It contains a counter 271, which counts up to 16 in each case, and then a further counter 272, which in each case counts up to K), which advances by one level. It can be seen that the count of the counter 272 indicates the current cycle of the reference counter 21. Since it counts in BCD-Codc, this counter 272 has a total of four outputs, which are followed by the set inputs of the four bistable flip-flops 273, 274, 275 and 276 . The signal Z at the output 23 b of the comparator 23 is fed to these flip-flops as a clock signal for taking over the count of the counter 272. The four output lines of these flip-flops together form the line 29 of FIGS. 1 and 2. The reset inputs of these flip-hops are combined and are connected to the key contact 28. This makes it possible to delete the four flip-flops and to make the signal at the appointment output memory 27 disappear.

In Fig. 7 shows the circuit arrangement which makes it possible to manually correct the time of the electronic clock. 2 denotes the minute clock, 3 denotes the counter arrangement and 8 denotes the time correction device, which can be actuated by four key contacts 10. The four counters of the counter arrangement 3 are denoted by 31, 42, 33 and 34, the counter 31 counting the minutes, the counter 32 counting the tens of minutes, the counter 33 the hours and the counter 34 counting the tens of hours. A logic circuit arrangement 81, 82, 83, 84 is connected upstream of each counter, the input of which is connected to the corresponding key contact 10. Each of the four mentioned logic circuit arrangements is made up of three and-not values, which have the effect of an exclusive-or circuit. An inverter is designated by 85, which puts the inputs of the two input-and-not gates of each logic circuit at different potentials.

In the normal course of time, the timer contact 9 is open and the minute clock is active. At the input of the inverter 85 there is zero potential, which is applied to one input of the And-Nichl gate of each of the four logic circuit arrangements 81 to 84. At the output of this gate there is thus a L signal, regardless of whether the corresponding key contacts 10 are actuated or not. At the output of the inverter 85, however, there is a L signal, which is therefore also present at the inputs of the Uad non-gate b . As long as no L signal, ie no pulse, is emitted by the minute clock, the second input of the AND-not gate b of the logic circuit arrangement 8! 0 signal, at the output of this gate there is thus an L signal, which in turn generates a 0 signal at the output of the logic circuit arrangement 81. If a pulse of the minute clock occurs, both inputs of the and-not gate b have a low signal, and consequently a 0 signal at its output, with the result that the signal switches from 0 to low at the output of logic circuit 81 and the minute counter 31 advances. This advancement takes place until this counter overflows and generates an L signal at its output A , which switches the AND-not gate b of the logic circuit arrangement from a 0 to an L signal and thus, analogously to the one already described, the The output gate of the logic circuit arrangement switches to a low signal, which in turn advances the counter 32. The counters 33 and 34 are incremented in a similar manner.

If, on the other hand, the key contact 9 is closed in order to undertake a time correction, then it is at the input of the inverter L-signal and at its output 0-signal. The situation is now reversed, unc now the and-not gates α can go through be switched when one of the key conlacts IC is operated. However, this time correction takes place no automatic switching from one number to the next, but each number has to be manually set to the correct number

In order to set the time zi to the second, a manual setting is first required made of the time, the key contact 9 opens only when the second hand of the Ver same clock is on 0 As soon as the button contact 9 ge is opened, the minute contact generator 2 comes to Effect and switches the clock in the already described bersen way away

For this purpose 4 sheets of drawings

Claims (14)

2 ί 17 claims: 1. Digital time display device with. an arrangement for entering timing dates, with a timing arrangement, a memory for the recording of several time dates (appointment memory) and an input device for entering the time dates and wherein the time display device emits a signal when a line date is reached, characterized in that the Input device is designed as a keyboard (9,10, 11, 12). with which the entry of the appointment time and the address of the memory location in the appointment memory takes place in numerical form and with which the appointment signal and the appointment memory can be deleted, and that a comparator (23) is also provided, which records the current time of the timing arrangement ( 1, 2, 3) with the stored ^r in the term spoke (20) compares the time schedule. 2. Digital time display device according to claim 1, characterized in that if they match the comparator (23) sends a signal to a downstream of the current time and time Arrangement (27) issues that the number of the entered appointment appear on a display (7) leaves. 3. Time display device according to claim 1, characterized in that the keyboard (11) has a numeric keypad for numeric entry of the time of the appointment and the corresponding address of the memory location in the appointment memory (20) and also contains a key (28) for deleting the appointment on the display. 4. Time display device according to claim 1, characterized in that the appointment memory (20) is a Appointment input memory (17) is connected upstream with storage space for an appointment in which the over the input device (11) is temporarily stored in the form of bits and that an address comparator (15) is present that works together with the appointment memory and the number entered Address used to generate a signal that the storage of the memory contents of the appointment memory to the corresponding place in the appointment memory. 5. Time display device according to claims 1 and 4, characterized in that the appointment memory (20) is designed as a dynamic circulating memory with storage spaces for η appointments, the memory content of which is continuously indexed by a clock generator (1) controlling the entire device. 6. Time display device according to claim 4, characterized in that one of the clock generator (1) controlled continuously running reference counter Is present (21), which each "cycles counting down, each cycle consists in bits, that this reference counter is connected to comparator with the addresses derail that the latter a comparison of the memory location address numerically entered makes with the number of that cycle that the The reference counter (21) is counting down, and that the reference counter (21) and the appointment memory (20) run synchronously controlled by the clock generator (1) in such a way that the number of the respective cycle of the reference counter (21) corresponds to the number of the memory location in the appointment memory (20 ) is equivalent to. 7. Time display device according to claim 6, characterized in that the number of cycles of the reference counter (21) corresponding to the number of possible appointments and storage locations η = 10 and the number of bits per cycle = 16. 8. Zeiiar.i-ciggerät according to claim 1 and one or more of the following claims, characterized in that the comparator (23) contains an exclusive-or gate (231) which compares a bit sequence derived from the current time and bit by bit the bit sequence supplied by the appointment memory (20) and corresponding to the stored appointments causes a first bistable memory element ( 232) to be provided, which is set at the beginning of each cycle and, if the two mentioned image sequences do not match, by the output signal of the exclusive-or gate (231) is reset that the output of the first bistable memory element (232) is connected to the input of an AND gate (233) , at the other inputs of which the clock signal and the signal (A, Ji, C , D) of the reference counter (21) create that the output of the AND gate (233) continues with the input of a second bistable storage element (234) in There is a connection and that finally the output of this second bistable storage element emits that signal which indicates that an appointment has been reached. 9. ZiMtanzeigegenit according to claims 1 and 8, characterized in that the signal generator (27) is designed as an appointment output memory which is connected to the signal output (236) of the comparator (23) and a counter (272) for the number of cycles of the Reference counter (21), and that at the output of this counter (272) several fip-flops (273 to 276) are connected, which when a signal is present at the output of said second bistable memory element (234) of the comparator (23) the counter reading of the aforementioned cycle counter (272) in coded form (BCD code) and output a corresponding signal to the digital display (7). 10. Time display device according to claim 1, characterized in that the clock generator (1) controlling the entire device is connected to a source (network, quartz generator) which emits constant vibrations, that a minute clock (2) is provided, which from the clock signals (UT) of the clock generator (1) successive in minutes distance signals (minute) erzeug: that further total of four counters are provided (31 to 34} which minutes (and tens), and h (and tens) count and corresponding signals for the generate digital display (7). 11. Time display device according to claims 1 and 10, characterized in that the digital display (7) operates from four connected in a group so-called 7-segment tubes, which by means of a counting stage, the minutes (Ones and tens) and the hours (ones and tens) count and display. 12. Time display device according to claims 9 to 11, characterized in that a locking circuit (4) is provided, which in its normal switching state, the signals of the minute and hour meter can get to the input of the digital display (7) while they are in their Locked state, controlled by the oem signal of the appointment output memory (27), which blocks the transmission of the aforementioned signals. 13. Time display device according to claim i2, characterized characterized in that in the blocking state of the blocking circuit (4) the counter signal of the appointment output memory (27) comes to the display tube for the minutes and as the number of the appointment is shown. 14. Time display device according to one or more of claims 1 to 13, characterized in that that a device for the manual setting of the time via the keyboard is provided, such that a separate key (9) is provided for »Zek correction« is, when activated the minute clock (2) it is separated from the four counters (31 to 34) for the minutes and hours that any four number keys on the keyboard are selected, next to their switch contacts (11) a further switching contact (10) is assigned to enter the number of the appointment, and that a logic circuit arrangement (81 to 84) between each of these switching contacts (10) each of said counters (31 to 34) is switched on, so that by actuating one Switching contact (10) the relevant minute or hour counter is switched one step further will. 35