DE2643938A1 - ALARM DEVICE FOR ONE WATCH - Google Patents

Description

Applicant: Kabushiki Kaisha Seükosha, Tokyo, Japan

Alarm device for a clock

The invention relates to an alarm device for a clock, with a switching device for setting different Alarm functions.

There are already clocks with an alarm system Ren known in which, after a first acoustic alarm signal has been emitted, a second after a predetermined period of time acoustic alarm signal is given. In such clocks, a switch is provided with which the alarm function is switched off can be. Another switch is used to set a repetition of the alarm signal. This is considered to be disadvantageous considered that a relatively large number of items is required, and that there is also the risk of that the user is pressing the wrong switch.

It is therefore the object of the invention to provide an alarm device for a clock for which fewer components are required and which can be set more easily and reliably. This object is achieved according to the invention by the subject matter of claim 1. Advantageous further developments of the invention are Subject of the subclaims.

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The essential feature is therefore seen in that a switch is provided, by operating it different Alarm functions can be set, such as a normal alarm, a repeated alarm or a shutdown of the alarm. An electrical circuit is used that has different alarm functions corresponding to the manual one Setting enables so that the desired alarm function can be achieved in an optimal manner.

In summary, the invention is therefore in an alarm device for a watch that has a manually operated switch that can be set in different ways with each setting corresponding to a specific alarm function. There is also a verification device for the respective Setting provided so that the alarm function is controlled to emit a corresponding acoustic alarm signal can be.

The invention is intended to be more detailed, for example, with the aid of the drawing explained. Show it:

1 shows a block diagram of an alarm device according to the invention;

■ Fig. 2A is a partially sectioned perspective view View of a switch for the embodiment in Fig. 1;

Figure 2B is a sectional view of the switch shown in Figure 2A;

FIG. 3 shows a graphic representation of waveforms for explaining the mode of operation of the exemplary embodiment in FIG. 1; FIG.

4 shows a block diagram of a further exemplary embodiment an alarm device according to the invention;

Fig. 5 is a block diagram of a third embodiment an alarm device according to the invention;

6A shows a sectional view through a further example of an ads guide a switch for an alarm device according to the invention;

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Fig. 6B is a side view of an alarm termination member for the switch in Fig. 6A;

6C is a sectional view taken along line 6C-6C in FIG Fig. 6A; and

Figure 6D is a sectional view taken along line 6D-6D in Figure 6A.

In the exemplary embodiment shown in FIG. 1, the output signal of a crystal oscillator 1 is fed to a frequency divider circuit 2, at whose outputs a and b signals occur with a frequency of several IcHz and 1 Hz, respectively. A motor 3 is excited by a pulse signal with 1 Hz, which drives the hands of a clock via a gear train in order to enable the time to be displayed on a display device 4. A counter 5 is used to count the signals with 1 Hz and emits pulse signals with a pulse duty factor 1/2 for periods of 20 seconds, 1 minute, 2 minutes, 4 minutes at connections c, d, e, f and g. The waveforms of the pulses at the terminals c to f are shown by curves A to D in FIG. In Fig. 3, the time t is plotted on the abscissa axis. The symbols T _Q to T- show a duration of 10 seconds, 1 minute, 3 minutes 30 seconds and 30 seconds, respectively. In the circuit in FIG. 1, flip-flop circuits 6-8 and gate circuits 9-13 are provided. The waveform E in FIG. 3 appears at the output of the gate circuit 13. A differentiating circuit 14 is used to differentiate the falling edge of the pulses, while differentiating circuits 15-17 are used to differentiate the rising edges of the pulses. An alarm signal is fed from the output of the gate circuit 13 to the base of a transistor 18 which is connected to a direct voltage source 24 via a resistor 20. A switch 22 is closed at a set time using a conventional clock mechanism. A manually operated switch 23 is used to set the alarm.

Fig. 2 shows an exemplary embodiment of this switch A pushbutton 25 is provided at one end of a shaft 26.

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On the shaft 26 is also a central part 27 with an enlarged Diameter provided on which projections 27a and 27b are formed, which protrude in the radial direction. A sleeve 28 has upper and lower parts with different wall thicknesses, between which a shoulder 28c is formed. In the thicker one Upper part of the sleeve 28 are inverted U-shaped longitudinal slots 28a, b, on which the projections 27a and 27b are displaceable are led. A magnet 29 and a reed switch 30 are attached to a carrier, not shown. The sleeve 28 is screwed to a stationary plate 31 (Pig. 2B). In the Sleeve 28 is arranged a spring 32 which engages on the underside of the intermediate part 27 on the shaft 26, so that the Shank 26 is biased upward by spring 32. On the shaft 26, a shielding plate 33 is arranged, which the switch 30 in FIG. 2 when the shaft 26 is in the upper position due to the spring tension. The push button 25 protrudes over an outer housing part.

The method of operation will be explained in more detail below. The alarm time is set in a manner known per se. During the setting, the manually operated switch 23 is open, as is the switch 30 because the magnetic field of the magnet 29 is shielded by the shielding plate 33. To simplify the explanation, it is assumed that the flip-flop circuits 6 and 7 are in the set state, while the flip-flop circuit 8 in Fig. 1 is in the reset State. Then the outputs Q, Q and Q of the flip-flop circuits 6, 7 and 8 are on the theoretical Value "1", "0" or "0". The gate circuit 9 is through the occurrence of the output signal 1 at the flip-flop circuit 6 and the positive potential of the DC voltage source (with a theoretical value "1") kept open. That's why it can Signal with several kHz at the terminal a of the frequency divider circuit 2 pass through the gate circuit 9 and arrives via the gate circuit 13 to the base of the transistor 18. At the time of the alarm time, the switch 22 is closed, see above that the signal is amplified at several kHz in the conductive transistor 18 in order to

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Speaker 21 to generate an acoustic signal.

By closing the manually operated switch 23, the acoustic alarm signal can be shifted. If the Push button 25 is depressed (Fig. 2), the shield plate 33 is moved downward so that the switch 30 is closed. The output of the switch 23 changes from "1" to "0", so that the gate circuit 9 is closed. Since that Signal with several kHz can no longer pass through, the acoustic alarm signal is terminated. When the switch 23 is closed is, the flip-flops 6 and 7 and the counter 5 are activated by the output of the differentiating circuit 14 reset. The spring 32 is so strong that the shaft 26 is then returned to an original upper starting position when the push button 25 is released. Usually the push button is only activated for a very short period of time pulled the trigger.

In the embodiment described, another occurs acoustic alarm signal after 3 minutes and 30 seconds after the end of the first alarm signal on when the push button is only depressed for 10 seconds or less, so that, for example, the user of a The alarm clock is woken up again when the 'T3 back button ~ nü' r ~ 'briefly' pressed 'V

By closing the switch 23, the output Q of the flip-flop circuit 7 is "1". After 10 seconds, a pulse P »with a waveform A in FIG. 3 is emitted by the counter 5, the differentiated output signal of which the flip-flop circuit 7 sets to" 0 "again. The output Q of the flip-flop circuit 7 therefore remains at "1" only for 10 seconds, during which time the gate circuit 11 is open. If the switch 23 is opened again within 10 seconds, the differentiating circuit 15 emits a differentiated output signal which passes through the gate circuit 11 and ^{brings the output Q of the flip-flop circuit 8 to 11} I ". After the time has elapsed T ₂ , i.e. after 3 minutes and 30 seconds, the gate circuit 12 gives an im-

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pulse P_ corresponding to E in FIG. 3, which has a duration T ₃
of 30 seconds and through which the gate circuit 10 is opened. Therefore, the alarm signal can be at several kHz,
which occurs at the terminal a of the frequency divider circuit 2,
pass through the gates 10 and 13, whereby the loudspeaker 21 is energized for 30 seconds. The same process is repeated when the switch 23 is closed again
so that after 3 minutes and 30 seconds a new acoustic alarm signal of 30 seconds duration occurs. If the
Switch 23 is not closed, the alarm ends after 30
Seconds, after which another pulse P_ with waveform E.
and another acoustic alarm signal is generated.

The alarm condition is terminated by depressing the pushbutton 25 in FIG. 2 until the upper ends of the projections 27a and 27b come under the shoulder 28c on the sleeve 28, so that by turning the pushbutton 25 a lock is made by engagement with the shoulder 28c can be done. In this position of the push button 25, the shielding plate 33 is lowered under the magnet 29 so that the switch 30 remains closed. As long as the switch 23 in FIG. 1 is closed, the gate circuit 10 also remains closed, so that no alarm occurs.
When the pulse with a period of 64 minutes occurs at the terminal g of the counter 5, the flip-flop circuits 6 and 8 are set or reset by its differentiated output signal, so that the entire circuit is on
the initial state is reset.

In the above embodiment is therefore in addition to
Switch 22 for the time setting only requires a manually operable switch 23 to enable three alarm functions, namely a setting of the alarm, a repetition of the alarm after a predetermined period of time and one
Termination of the alarm. All settings can therefore be used
done with the help of the same switch 23 and by using an integrated circuit only a very small size of the clock is required.

In the embodiment described, the

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new alarm after, a constant period of time after Depression of the pushbutton to close the switch 23. Optionally, this time interval can be used for successive Alarm signals are gradually reduced. For this purpose a number of pulse trains from the counter 5 are relevant AND circuits supplied. A memory circuit, for example a shift register, receives the output of the gate circuit 11 and gives its output to each of the AND circuits away. The alarm signal is also passed on to the AND circuits. Other parts of the circuit can be as at the embodiment described be executed. With everyone Receipt of an output signal from the gate circuit 11 is the contents of the memory circuit are changed and the outputs of the memory circuit select one of the AND circuits to the Determine the time at which the alarm signal can pass.

In the embodiment described, the generation of the alarm signal is determined by the switch 22 which is connected in series to the loudspeaker 21. Optional the switch 22 can be used to set the theoretical potential, thereby opening and. Closing the Control gates 9 and 10.

Instead of feeding the alarm signal through the frequency divider circuit 2 the loudspeaker itself can also generate the alarm signal and the acoustic signal. For example, the The transistor 18 and the loudspeaker 21 can be replaced by a blocking oscillator, which is generated by the output signal the gate circuit 13 is actuated and its output signal is fed to an acoustic device for generating an acoustic signal.

As already mentioned, in this embodiment only a single switch required through which different alarm functions can be set, namely at least three different alarm functions so that the User can set the relevant alarm functions by pressing the same switch. This also makes the handling

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Exercise of the clock is much easier.

A second exemplary embodiment is to be explained in more detail with reference to FIG. 4. In this embodiment is also a quartz oscillator 1, a motor 3 and a display device 4 are provided as in the exemplary embodiment in FIG. 1, likewise a loudspeaker 21, a switch 23 and a DC voltage source 24. The switch 23 is as in the exemplary embodiment formed in FIG. A frequency divider circuit 34 has three outputs h, i and j, at which signals with several kHz, with eight Hz or with 1 Hz, which are obtained by frequency division of the output signal of the crystal oscillator 1 will. A counter 35 is used to generate pulses with 4 Hz or 1/256 Hz at outputs k and 1. A shift register 36 has a storage capacity of 4 bits. The circuit also includes a flip-flop circuit 37, gate circuits 38 to 44, Inverters 45 to 48, a transistor 49 and a resistor 50 are provided.

The method of operation of the exemplary embodiment is to be explained in more detail below. When setting the normal alarm function, the alarm time is initially set using a conventional mechanism. Since the manually operable switch 23 is normally open, as can be seen from FIG. 2, the gate circuit 40 is also open. The terminal m of the shift register 36 is at a theoretical potential "1", which is written into the shift register 36 by the pulse signal at 8 Hz which is output from the terminal i of the frequency divider 34. Therefore, each of the outputs D1 to D4 of the shift register 36 is at "1", while the outputs D1 to D4 are at "0", so that the output signal of the inverter 48 is "O" and the reset of the counter 35 is canceled . This is because the counter 35 is reset by an input signal "1". The terminal 1 of the counter 35 is on O ¹¹ "as long as no signal is supplied from 1/256 Hz, so that then the output of the gate 41 is set to" is 1 ", and the gate is opened 42nd Then, a pulse passes from 8 Hz

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from the terminal i of the frequency divider circuit 34 via the gate circuit 42 to the counter 35. When 256 seconds have been counted by the counter 35, its terminal 1 comes to "1" so that one the inputs of the gate circuit 43 are at "1". When the counter-35 is changed to "1", the connection is in place Tc to "O" because of the phase relationship between the terminals k and 1 so that the output of the inverter 45 becomes "1", likewise the output signal of the gate circuit 43, whereby the flip-flop circuit 37 is reset. That is why it is located the output Q of the flip-flop circuit 37 changes to "0" and the output signal of the inverter 45 is changed to "1", whereby the gate circuit 39 is opened. The output signals at the terminals h and i of the frequency divider circuit 34 are via the gate circuits 39 and 40 are supplied to the base of the transistor 49. When the alarm time is reached, the switch 22 is closed and the loudspeaker 21 then emits an acoustic signal Alarm signal.

To interrupt and repeat the alarm, the pushbutton 25 in FIG. 2 is depressed to activate the switch 23 to close, so that an output signal "0" at the terminal m of the Shift register 36 occurs via the terminal i of the frequency divider circuit a frequency signal is supplied. Therefore, Dl to D4 and Dl to D4 are changed to "0" and "1" while the output of the gate circuit 44 remains unchanged. When the push button 25 is released, the manually operable one becomes Switch 23 is opened again and "1" is written into shift register 36. When D2 is changed to "1" because of the following output D4 is "1" at this time, the output of the inverter 48 is changed to "1" so that the counter 35 is postponed. The flip-flop circuit 37 is operated so that its output Q goes to "1" and the output of the inverter 46 to "0". Then when the gate circuit 39 is closed is, no frequency signal can pass from the terminals h and i of the frequency divider circuit, so that the generation of a acoustic alarm signal is prevented. When a signal "1" is written in the shift register 36, the output becomes of the inverter 48 changed to "O", so that the counter 35 from the

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Reset cellage is released, reducing the count in the described Way begins. As soon as 256 seconds have been counted, the acoustic alarm signal is generated again. Therefore will a new alarm signal is given every 256 seconds if the push button is pressed repeatedly.

To switch off the alarm status completely, the Push button 25 depressed and then rotated in the manner described in connection with Fig. 2 to set the manual switch 23 to keep closed, in which switching position the gate circuit 40 is closed, so that no acoustic warning signals be submitted with this setting.

in some cases it is desirable that alarm signals can be given at different time intervals. For example, such an alarm sequence is desirable if the function of the watch is to be demonstrated to a buyer, in which case it would be undesirable to wait 256 seconds until a new acoustic signal can be emitted. To this end, the switch 23 is closed in order to set a repeated alarm. Then the output Q of the flip-flop circuit 37 is at "1" and when the switch 21 is subsequently closed, the output of the gate circuit 24 returns to ¹¹ O ", as a result of which the flip-flop circuit 37 changes to" 0 " so that the gate circuit 39 opens, the alarm signal can then pass through the gate circuit 39 and reach the transistor 49 via the inverter 47 and the gate circuit 40 in order to energize the loudspeaker 21.

Therefore, an acoustic alarm signal can be generated at any time by first turning the switch 23 to Setting a repeated alarm output is actuated and then closed.

In the second embodiment described, this is Shift registers 36 mainly provided to avoid difficulties to avoid that caused by switch bouncing of switch 23 can be. If switch bouncing does not have to be taken into account, the logical output signals can be due to

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-vc- 43

the opening and closing of the switch 23 of the gate circuit 40 are supplied »so that a corresponding mode of operation results if a differentiating circuit instead of the Shift register 36, the gate circuit 40 and the inverter 48 is provided. It is also in this embodiment possible instead of an alarm time interval of 256 seconds provide longer or shorter intervals.

In this embodiment, in addition to the simplified Construction has the advantage that an alarm can be caused at any desired point in time, with the help of a logic circuit through which the output signal with each actuation of the switch is changed and the alarm is triggered by an output signal therefrom.

A third exemplary embodiment is to be based on FIG. 5 are explained in more detail. In this embodiment, reference numerals 1, 3 and 4 and 21 to 24 denote the same parts as in Fig. 1, and reference numeral 34 a frequency dividing circuit corresponding to FIG. 5. A first counter 51 consists of a frequency divider with a division ratio of 1/64, the to connections: s or u emits pulses of 4 Hz or 1/4 Hz. A second counter 52 includes a frequency divider with a Divider ratio of 1/64. In the circuit are also a Shift register 53, gate circuits 54-64, an inverter 65, a Transistor 66 and a resistor 67 are provided.

The mode of operation of the exemplary embodiment in FIG. 5 will be explained in more detail below. The manually operated switch 21 is normally open and one of the inputs of the gate circuit 55 is held at "1". The input ν of the shift register 53 is held at "0" by the 8 Hz pulse emitted from the connection q of the frequency divider 34, which signal is written into the shift register 53. The outputs D1 to D4 are therefore held at "0" and the outputs D1 to D4 at "1". Since the two inputs of the gate circuit 56 to ¹¹ O "and" 1 "are located is the output of" 1 "and the two counters 51, 52 are released from the reset state, so that the pulses counted 8 Hz

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occurring at the connection q of the frequency divider 34. The gate circuit is activated by the output signal "1" of the gate circuit 56 59 open. Since the output D4 of the shift register 53 is held at "0", the output of the gate circuit is located 57 to "1", whereby the output of the gate circuit 59 remains at "0". Therefore the output of the gate circuit remains to "1" and the gate circuit 62 is open. That supplied by the connection s of the first counter "51 to the gate circuit 62 Signal with 4 Hz is used to open and close the gate circuit 60. When the gate circuit 60 is opened, this is from the terminal η of the frequency divider circuit 34 output signal let through by the gate circuit 63 at several kHz. Since the output D2 of the shift register 53 is at "1", remains the gate circuit 63 is opened, so that the frequency signal is fed to the transistor 66. Then when the switch 22 at When the alarm time is closed, the loudspeaker 21 is energized to generate an acoustic alarm signal.

In this embodiment, a repeated acoustic signal occurs after 256 seconds if the manually operable switch 23 is depressed for less than 4 seconds. When the push button 25 is operated, the switch 23 in Fig. 5 is closed to change the output of the gate circuit 55 to "1". This change results in a sequential change in the outputs D1 to D4 of the shift register to "1". When the output D2 reaches "1", the output D3 is still at "1", so that the output of the gate circuit 56 is changed to "0". As a result, the output of the gate circuit 59 becomes "1", whereby the counters 51 and 52 are reset. If both inputs of the gate circuit 61 are at "1", their output goes to ¹¹ O "and the gate circuit 62 is closed, so that the acoustic alarm is ended. Since the switch 23 is opened again after closing, the output signal is the gate 55 is "0"_# which sequentially outputs Dl to D4 and Dl to D4 on! ¹ O "or" change 1 ". If after resetting the counters 51 and 52 256 seconds have expired, the output is activated

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of the counter 52 to "1", whereby the output of the inverter 67 is changed to "O", so that the gate circuit 64 is closed and at the same time the output signal of the gate circuit 61 is "1" will. Therefore, the gate 62 is opened and lets the alarm signal from the gate 60 through, which signal darch the gate circuit 61 to the transistor 66 passes to the loudspeaker 21 to excite.

If the alarm function is to be switched off completely, the push button 25 is described after depressing in FIG Rotated way, so that the switch 23 remains closed and the output signal of the gate circuit 55 is held at "1" will. Therefore, the output signal D2 of the shift register 53 held at "0", whereby the gate circuit 63 is closed wM and the acoustic alarm is ended.

To enable an alarm at any desired time, switch 22 is closed and then the switch 23 also closed for more than 4 seconds. If switch 23 is kept closed for more than 4 seconds, the output D2 of the shift register 53 causes the described termination of the alarm state “On the other hand, the Closing the switch 23, the output signal, the gate circuit 56 changed so that the counters 51 and 52 are reset and a count of time interval Ie η can begin. The exit D4 of the shift register 53 then becomes "1". held so that the output of the gate circuit 57 is changed to "0" when 4 seconds have been counted by the counter 51. At this time, the output of the counter 51 is changed to "1". That's why the output of the gate circuit 58 is changed to "1", whereby the output of the gate circuit 59, which the output signal "1" from the gate circuit 56 is changed to "0". Therefore, the output of the gate circuit 61 is changed to "1" and the gate circuit 62 is opened. When the switch 23 is opened, the output D2 of the shift register 53 changes to "1" and the gate circuit 63 is opened, so that the alarm signal through the gate circuits 62 and 63 to operate the Speaker 21 can pass through. Therefore, the audible alarm signal can be obtained at any point in time.

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In the embodiment described, these are shift registers 53 and the gates 54 and 55 mainly provided to avoid difficulties caused by switch bouncing of the switch 23 can be caused. If switch bouncing does not have to be taken into account, the logical Output signals corresponding to opening and closing of the switch 23 can be fed directly to the gate circuit 57 and the gate circuit 63 after the output signal has been reversed. It can then have the same function as in the third embodiment can be achieved if a differentiating circuit is provided instead of the gate circuit 56.

Although in the described embodiment an alarm signal is repeated every 256 seconds, by depressing the switch 24 for a longer period of time a time interval other than 4 seconds can be achieved by suitable setting of the counters 51 and 52.

A modified exemplary embodiment is intended to be based on FIG. 6A the scarf age 23 are described. A recess 69 is provided on an outer housing part 68 of the watch. One Push button 70 is biased upward by a helical spring 71 and vertically along a limited stroke Movable direction. A corrugation is provided on the top of the pushbutton 70 for a better grip with a Finger to allow. On the push button 70 is an alarm termination member 72 which protrudes into the housing 68. As can be seen from FIGS. 6A and 6B, there are on the link 72 Projections 73 formed. These projections extend in the radial direction and have a wedge-shaped cross-section, whose tapered side is on top. Under the projections 73 a groove 74 is formed in which an E-ring 75 sits, such as can be seen from Fig. 6A. The stroke length of the pushbutton is limited by its lower end face and the ring 75. In the area in which the member 75 protrudes downwards, bores or slots 76 are provided which are designed so as to that the projections 73 can pass through in the vertical direction. In the open position of the push button 70 shown in FIG. 6A

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is shown in solid lines, the lower parts lie of the protrusions 73 in the leading slot 76. Therefore, the push button 70 in Fig. 6A in solid lines position shown can not be rotated, but only moved downwards. When the push button 70 is in the dashed lines Is depressed position shown, the projections pass through the leading slots 76, so that then the pressure button 70 can be rotated. On the underside of the recess 69 on the housing 68 stops 77, 78 are formed on which one of the projections 73 engages in each case, as can be seen from FIG. 6C. These stops 77, 78 serve to limit the rotation of pushbutton 70 when depressed. Then when the push button 70 is clockwise in FIG is rotated to the stop against the stop 78, engage the projections 73 on the underside of the recess 69, so that the push button 70 remains in this position when the push button is no longer pushed out.

A capsule 79 (FIG. 6A) for receiving a clockwork is provided on the housing 68. There is a bearing on the capsule 79 80 is provided around which a lever 81 can be pivoted, which is used to terminate the alarm. A spring 82 is with her one end attached to the lever 81 and at its other end to a stationary plate, around the lever 81 clockwise to pretension. One end 81 a of the lever 81 protrudes far upward so that it engages the terminating member 71 can. The other end 81b of the lever carries a resilient member 84 which bears against the top of a substrate plate 83 of the circuit can be pressed and moved along this, as can be seen from Fig. 6B. On the plate 83 there are two separate ones Circuits 85, 86 printed in the usual way. The arrangement is chosen such that the resilient member 84 against the two circuits 85, 86 can be pressed at the same time in order to connect them electrically to one another when the Lever 81 is pivoted into the position shown in dashed lines in FIG. 6A when the pushbutton 70 is pressed down. On the plate 83 is also a circuit for the generation

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of the acoustic alarm signal.

If the switch is to be closed for a certain short period of time, the push button 70 is against the Effect of the spring 71 he pressed down, so that by the alarm termination member 72, the lever 81 is pivoted counterclockwise and the circuits 85, 86 by the resilient Link 84 are connected. This closes the switch. When the pushbutton is released, it returns to its initial position raised, in which the circuits 85 and 86 are no longer connected to one another. If, on the other hand, the switch is closed is to be held, the depressed pushbutton 70 rotated until the projection 73 comes into contact with the stop 78 in Fig. 6C. In this position the protrusions 73 retained on the underside of the recess 69 so that the push button remains in this position, even if it is no longer pulled. In this situation, therefore maintaining electrical connection between circuits 85 and 86 through member 84.

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Claims (4)

9/28/1976 S-4039 claims 1. Alarm device for a clock, with a switching device ~ for setting different alarm functions, g e Tcennze Inside t by a manually operable switch (23) for generating switching signals accordingly one of at least three different alarm functions, by a switch (22) which is operated at the time of the set alarm time, by a first device for the detection of the alarm function to which the switching signal corresponds, by a second device for setting the Period of repeated generation of an acoustic alarm signal, and by a third device for controlling a device for generating the acoustic alarm signal by working together an output signal from the first Device, the switch (22) and the second device. 2. Alarm device according to claim 1, characterized in that g e identifier ichnet that the manually operated switch (23) includes a movable member (26) by a spring (32) is biased into a starting position that a device for limiting the stroke distance of the movable Member (26) is provided that a device (28c) for preventing the return movement of the movable member (26) is provided, on which a projection (27a) engages the pressed-down member (26) after it has been rotated, that a shield member (33) on the movable member (26) is provided for shielding a magnetic field, and that a reed switch (30) is arranged over a magnet (29) in this way is that the shielding plate (33) is located between this switch, (30) and the magnet (29) when the movable member (26) is depressed. ORIGINAL INSPECTED 7098T3 / 0806 3. alum device according to claim 1, characterized g e identifier Ichnet that the manually operated switch has a push button (70), which by a spring (71) is biased into a starting position that a device for limiting the stroke length of the push button is provided, that a device for preventing the pushbutton (72) is provided in the starting position when this is depressed State is rotated by a predetermined angle, and that an electrically conductive device (84) so with the push button is coupled that when you depress the Push button establishes an electrical connection between the circuit elements (85, 86). 4. Alarm device according to claim 1, characterized in that that the second device is a counter (5) for counting time pulses. 709813/0806