DE2036159A1 - Electronically controlled metronome - Google Patents

Description

DIPL. ING. DIETRICH 1.EWALD S MÜNCHJU »13 '/.^" ^ P

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TBLSTOJt MHM

»KM

Affaires B. 13

Andre PAQtJET, BEAUMONT S / OISB (France)

Electronically controlled metronome

The invention relates to an electronically controlled-metronome for the simultaneous transmission of optical SohallBignalen and alternately at two Light pending signals having a desired frequency 'i

Metronomes of this type are already known. In most In most cases, such a metronome has a single luminous symbol.

The SchaXlabstrahleinriohtung is generally through formed a loudspeaker. However, a metronome is also known in which an electromagnetic sound emitting device

000886/0277

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Direction with striking mechanism from an electronic circuit is controlled in such a way that each stroke is simultaneous with the lighting of a lamp is accomplished. It can two lamps to simulate the movement of a rocker arm be provided.

Such metronomes, however, suffer from a number of disadvantages on. The sound intensity is difficult to adjust. In particular in the case of the electromagnetic Schailabetraheinriohtung with striking mechanism, the base intensity and accordingly the sound intensity can only be adjusted by interposing a adjustable potentiometer between the energy source and the optical radiator so that a simultaneous Dosing of the optical, signals and acoustic signals he follows. In addition, there are difficulties in keeping the sound level constant as a function of the frequency. Furthermore, the frequency can fluctuate as a result of changes in the supply voltage. This is particularly troublesome when using galvanic batteries as an energy source.

According to the invention, which relates to a metronome of the opening referred to, these disadvantages should be eliminated. This is achieved by a circuit arrangement with the following features

a) a circuit with adjustable time constant, it has a capacitance and two resistors ₉ of which one is adjustable;

b) a switching transistor (Unijunotlon-fxHMietor) equivalent circuit using two Irane transistors and two resistors}

«3 009 886/0277

ο) a circuit cur outputting optical signals, the essentially consists of an electronic flip-flop which is triggered by negative impulses and two transistors in each of the Kippaohsltuagssrare having}

d) a circuit for outputting completely regular Sound signals with constant Trequens la Fall a tension band.

An electronic metronome constructed in this way thus includes Devices that allow the selected operating frequency to be kept constant, and are also available when it is reduced a sufficient sound signal from the supply voltage, Ee also has an emitter for optical signals and a shut-off device for acoustic signals, the work completely at the same time. The acoustic radiation device is equipped with devices for quick, easy and precise setting of the operating frequency and the selected sound intensity.

More details and advantages of a metronome naoh der Invention are explained in more detail with reference to embodiments shown in drawings.

Show ee »

Fig. 1 is a circuit diagram of a first Ausftthruagsbeiepiels a metronome according to the invention;

Flg. 1a shows a diagram to illustrate the working principle the circuit according to the first embodiment;

Flg. 2 is a view of the acoustic emitting device according to the first exemplary embodiment from above;

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Fig. 2a this

© ntepreolieni of idols IX-II la Fi

Pig. 4 a Sehaltpla »

a metronome based on the fourth invention.

The one in Pig. 1 shows essentially a circuit diagram adjustable time constant circuit, consisting of resistors RL and R2 as well as a capacitor C1. The plan also shows a switching transistor (unijunction transistor) equivalent circuit made by awti transistors Q1 and Q2 and two resistors R3 uni 14 is formed. .--. There is also an electronic toggle switch with 'release. " provided by negative impulses on one of their ' two transistors Q3 and Q4 on both sides and two transistors Q5 and Q6 on the other side. The transistors are switched in such a way that a® sufficient® saturation even for the pail of weakening, the source of energy is.

Never when using galvanic batteries For example, the saturation remains at the same level. Bottling the ' Initial voltage from 9 V to 4.5 V is sufficient «to achieve a complete Uniformity of the signals for each operating frequency of the Secure metronoms.

The circuit diagram finally has two supplementary diodes D3 and D4, the dao presence of a current in one of two coils B1 and B2 of the sound emitting device B and in one of two lamps L1 and L2 of the optical radiator at the moment the stress peak is established, which then arises,

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when the electronic flip-flop trips and the current in one of the transistors Q4 or Q5, as described in detail later, bu stops flowing *

The circuit is activated either by means of a switch (in Pig. not shown) or by direct actuation of the ' The setting button of the resistor R2 is connected to voltage.

In Fig. 1a, the time is as the abscissa and the voltage V is on the connections of the capacitance CI plotted as the ordinate. Ea is now shown that the selected frequency of the metronome does not depend on the supply voltage. When applying voltage loads the capacity until one is reached by the Resistance holdings R3, R4 of a certain value V Transistors Qt and Q2 then conduct. The capacitance C1 discharges and the capacitance 02 becomes close to a potential Zero returned. Due to the relationship to the above-mentioned potential, then appears at the upper terminal of the Resistance R1 a negative impulse »that of the electronic Toggle switch triggers. Ee begins a new cycle, The The value of the tripping potential U for the transit gate Q1 has a Relation to voltage V like R3 / R3 + R4. The period of the puncture ρ depends only on the exponential increase of the Ladt curve of the capacitance 01, i.e. from the constant (R1 + R2) 01, the using the potentiometer »R2 set loads. Thus, the trigger frequency (trigger frequency) depends on the Residual currents do not depend on the supply voltage of a galvanic battery applied to the two terminals P1 and P2. This results in a completely uniform operation the selected frequency of the metronome according to the invention, the does not depend on the battery voltage (or on a other suitable power source). Ee then two simple ones are sufficient Beginning adjustments to ensure a reliable Metronome operations. On the one hand, the attitude stimulates de »au

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sweeping frequency range * by means of the full stroke of the potentiometer R2. This frequency range generally corresponds to a metronome operation -of 40 beats per minute to 208 beats per minute. The result is a frequency range between a minimum of 0.333 Hz and a maximum of 1.733 Hz (pminimum m 3 «eo; pmaximum« O »577 see). On the other hand, there is an integration of the absolute value of the frequency on a certain point in the potentiometer range, preferably the minimum frequency of 0.333 hay. The operation of the electronic flip-flop is known. The circuit © with the transistors Q3, Q4 and Q5, Q6 are alternately unlocked and ßtromver »supplied. the corresponding lamp L1 or L2 lights up. During each tilting process, a sound signal is generated - because one of the coils BI or B2 of the sound beam direction is always connected to voltage.

An embodiment of the .akuetieohen radiation device B according to the present invention is in.den Fig. 2 and 2'a in the form of an electromechanical bed frame arrangement.

Se is provided with the coils 10 and 10 ', which are on a

stands aue a plate 11 made of magnetic mild steel ₉ on the movable cores 12 and 12 "- also made of magnetic mild steel by means of nuts 15 and '15 ° attached SInS ₀₁ welch® the learn 12 and 12 'on their IuBeTOn sit. d®winä @ n Hold the ends in place using supports 16 and others 16 of the plate 11. The Spml @ B 10 and to ⁸ are attached to the impact plate 13 made of magnetic FlnJlütahl centered on the screws 14. © iner Bodeaplatt © 30 of the Me-tEOnomgehäusee. The anchor arrangement A is carried by the oil® Ofe®reeite of ^ magBetiBehem Flußetahl b @ etQh © aö @ alüMtt®2s ^> 18, which is attached to an external magnetic steel threaded pin 17. "Ein® and © 5? ®. BfattdE ¹ 19».

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Made of magnetic fluo steel, serves for determination and control the location of the anchor assembly A on the threaded pin 17. The Anchor arrangement A is fastened to the threaded pin 17 as an aid in a hole arranged in the center of the plate 11 with a certain clearance (j) in such a way that the anchor arrangement a tilting movement about the axis b-z, which is identical to the Length axis of the thread If'es 17 is, can perform. By threaded pin 1 screwed tightly and guided in nut 20? thus allows his own storage and the Adjustment of the position of the anchor arrangement A in relation to sur Impact target 13.

The soleplate impact plate 13 is indented and arched at the points of impact of the movable cores 12 and 12 ', namely of such a kind that impacts with a width and length 1 which are exactly equal to the diameter d of the interior of the coils 10 and 10' are » be formed on the plate 13. The plate 13 having these impacts allows a magnetic permeability to be achieved at the locations of these impacts which is concentrated in the axial direction of the movable cores. This results in a perfect centering of the mentioned cores and an exact mounting of the anchor arrangement A. The pin 17 is extended near the top (in the figure) and penetrates the front plate 22 of the metronome housing. An adjustment knob 23 made of insulating material is fastened at its end so that the position of the anchor arrangement A in relation to the base impact plate 13 can be adjusted by means of feet or screwing. With the axle bearing in a suitable insulating material, the attachment of the pin 17 can be provided to ensure stability. The way the acoustic radiator works is as follows! The electric current is output from the multivibrator to either one or the other Syul · 10 bew. 10 * by means of the soldering lugs U. The movable cores 12 and 12 "

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who is under tension

in contact with the joint surface.

finds the other coil © "on

movable core is attached to the

Waste noise of the moving core on forms the sound generator of the metronome. Accordingly, the movable nuclei the impact organs ..

At the moment when the trigger hold is triggered, that's one of them Cores 12 and 12 'in contact with the base plate 13 and the current is geeooiokt in the other coil «It will then an overvoltage is generated in the coil, which aioht more is fed; the diodes 3) 3 or D4 do the job * over itself the circuit consisting of these coils of the lamp, the switched-through diode and the point P1 "the in Pig. 1 is shown, close again. Dtr electricity thus continues to flow, while it does so during the specified time In the corresponding coil is weakened. The two Coils are connected in counterflow »Thus, when triggered the toggle switch is the one on the Schlagauftreffplatt® Kern pushed back to obon. Thanks to the diodes D3 and D4, the current of the overvoltage thus allows an attack against the magnetic hysteresis of the circuit and improves the switching performance of the system. This change in the position of the movable nuclei is due to the special formation of the Plate 11 in the anchor assembly A allows. The »® plate can tilt around the z-z axis and in the plane of the x-x axis. The drop height of the movable core® (on the abutting surface) and consequently the sound level of the impacts is by means of the set screw 17 and the nuts 18 and 1'9 Unit adjustable. This threaded pin 17 can la the nut protruding from the base impact plate 13 be screwed tight (or loosely screwed), «/» na der Pin 17 is screwed tight (reducing the drop height),

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he can in a recess provided for this purpose in the bottom 12 of the Protrude into the metronome housing. The setting of the sound level This can be done by turning the on the plate 22 of the metronome case attached button 23 accomplish.

Fig. 3 shows in section an embodiment of the metronome according to the invention. An energy source 30, for example one or more batteries, is attached to the housing bottom. on the acoustic radiation device B is attached to the rear wall 12. The adjusting pin 17 penetrates the wall 22 of the housing. At this point it is characterized by a bearing 21 suitable insulating material. On the plate 22 are at the same time the button 31 to start the metronome and the setting button 32 for the operating frequency of the metronome are attached This button "operates the setting resistor (R2 in Pig. 1), which is located in a housing 33, internally at the same time the resistors RI, R3, R4, RI1 »the capacitors 01, C2 and the transistors Q1, Q2 can be arranged. One housing 34 "houses the actual multivibrator, plate 22 finally carries the lamps Li and L2, these two being are spatially attached in such a way that the rocking of a swivel ηβΒ klasairjchsn metronoma is modeled.

In a second embodiment, the emitting device for the sound signal consists essentially of a dynamic one Loudspeaker and its electronic operating system. The latter is implemented in the form of an electronic switch intended for a dynamic loudspeaker to put into operation according to a desired rhythm and synchronously with the optical signals.

The electronic control according to the second exemplary embodiment, the circuit diagram of which is in Pig. 4 is shown, has a time constant maintenance Z , which is divisible and divided into

-. 10 -

BATH ORIGINAL

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den Widerstünden.RI ι 12 and the tepeE-Itfit'G1 is provided. This circuit also ZB®igt the Iqtaiv @ leat eiaea Sohftlt transistore (Unijunotion-Xrsneisto?) M · L SIn Liohteohaltkreie ad in the Fore ©! SSSN idea sistoren Q1 and Q2 and the resistor 13 'to obtain & ®r optical Signs ,! * beds from a tlekironiechen toggle switch old draw with negative impulses, with two Trsnaietoren QS ₁ , Q4 bbw for the lamps L1 and L2 in each tilting position. Q5t Q are provided. The transistors are bstriel> en _v dsB - a sufficient saturation even - then it is "w" among other things oils' α energy source pairing itself ahsohwucht.

Finally, the wipe assigns the time constant Z and the Liehteignalkreie, L iswieeh®ngeechalt®te Sehallsignalkreis S © inen dynamiaehsn loudspeakers BU ®in © a y

R2 g © speiet © a

aouos _o Io

ienaator 01 blocks

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Betrlebsfrequena (relaxation frequency) of the metronome is determined by the potentiometer R2, with which preferably Let the main switch dee metronomes be connected to any Wtise (not shown in Pig. 4).

The loudspeaker H of the sound signal circuit S tottltst preferably has a small diameter and, like every dynamic organ, has a hard membrane. The electrochemical capacitor C ₁₀ with a relatively large capacity is charged _{via the resistor R 10.} When the time constant Z emits a pulse, a switch consisting of the thyristor T closes and discharges the capacitor C ₁₀ via the movable coil (not shown in the drawing) of the loudspeaker H. At the time of the discharge of the capacitor Ci to the Resistor R12 transmits a pulse from the output of transistor Q1 to thyristor T via a small capacitance capacitor C11, which essentially serves to prevent continued coupling between transistor Q1 and thyristor T.

The discharge current of the capacitor C ₁₀ creates a force which pushes the membrane of the loudspeaker H back. The current decreases as the capacitor C ₁₀ empties. When the value of this current falls below a minimum threshold value, the membrane of the loudspeaker H comes out of its rest position again and sucks an electromotive force in the opposite direction, which holds the thyristor T out. The Lautepreoher H is thus switched off. It oscillates in a few msec at its own resonance frequency, which is slightly changed by the envelope in which the loudspeaker is located. In the present pail, this covering is the hetronome housing. Regular signals with excellent sound quality are thus obtained

<■>;!? ■? / ; ■ ■ - 12 -

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appealing sound volume «Di © fQaiatöasitlt-wix'ö middle® dea potentiometer R11 ei
has and. in series

The sound signal circuits B of the tilting afo “With transistors Q3 ₉ Q4» Q5

circuit the alternating lighting up and L2. These © lamps light up completely

signal and serve to replicate the

lever of a classic metronome. -.

It can be advantageous, either di® Schelleigaale or * die interrupt optical signals »The sound is in advance» » wisely using the potentiometer «EU made ineffective« The Luminous signals can preferably be activated by the Open @ ia © i switch I suppress that ". For example isa poeitiy-. Cable run between the plue glue line · (4-) and th lamps L1 and L2 is arranged. .

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Claims (1)

P a t e nt a η s ρ r ti ο he Electronically controlled metronome for simultaneous Emission of sound signals and optical signals alternating between two luminous signs with a desired frequency, marked duroh an electronic circuit arrangement with the following features: a) a circuit with adjustable time constant that one capacitance (01) and two resistors (Rt, R2) one of which (R2) is adjustable; b) a switching transistor (unijunction transistor) equivalent circuit using two transistors (QI, Q2) and two resistors (R3, R4) i o) a circuit for sending optical signals that consists essentially of an electronic flip-flop, which is triggered by negative pulses becomes and two transistors (Q3 »Q4 and Q5t Q6) in each of the tilt posture sides has j d) a circuit for sending completely regular sound signals with a constant frequency im In the event of a change in food supply. 2. Metronome according to claim 1, characterized in that to ensure the regularity of the acoustic beats and two diodes (2> 3t D4) to improve the sound output Are provided, .the each at the output of a flip-flop aoeite or at the output of the other Eippschalteseite as well as at the entrance of the acoustic radiation devices (B). 009886/0277 3. Metronome according to claim 1 or 2 ,. characterized,, that the acoustic radiation direction (B) is an -electr.omechanical Striking mechanism is what a striking target (13), which alternate from the one or the other two movable, in from the electronic one Flip-flop fed coils (1O "10") arranged Cores (12, 12 ') is struck and because the movable borrowed Cores (12, 12 ') are tied by means of a plate (11) \ * rocking about a central axis. 4. Metronome according to claim 1, characterized in that the Circuit for separating the sound signals between dor circuit with the constant time constant corresponding to the Switching transistor switched on with equivalent circuit and the circuit on emitting the optical Signal® and that this® circuit - for Au8o © nduBg the sound signal © consists essentially of an electronic switch, ete in accordance with the desired rhythm Press a loudspeaker at intervals. 5 "M © tronoa aaeh claim 3, -thereby geksnns®! _B leveled that the drop height of the learn (12, 12") to. but the impact target (13) © is adjustable. · β ο metronome according to claim S ₅ thereby k <snns @ ichn © ti> that the device for setting the waste height © dor core © (12, 12 ') from a threaded pin (17) »with © in @ m certain play (j ) in i®2> Mitt® u & ä in d © r Aohs® of the rocking plate (11) is arranged _p wxb two Mutt @ ra (18/19) ,. are on bolden Seitön this plate (11) -with such a game appropriate that diois © Platt® (11) slightly wipp @ B may soait and the SoUlagauftreffplatte- (13) duroh the cores (12 _f 12 ') ansshlsigfear @iad _s ®®ui © aufgs a Qewlndemutter (20) is _9, the svs B ^ ltespung of the threaded pin (17) on d @ s "Schlagauftroffplatte (13) mounted feet is» s © d & 8 ü & r pin (.17) iÄ ά®Έ auftreffplatt ® (13) feet «or l ©! © ehsmu ¥ te3P lit ο 009888/0277 ' ■ -. 15 - 7. Metronome according to claim 6, characterized in that to ensure perfect centering; the Cores (12, 12) the strike target (13) with a Bulging or perforation at the point of impact of the movable cores (12, 12 ') is provided. 8. Metronome according to claim 4, characterized in that the eleldronisohe switch a thyristor (T), a electrochemical capacitor (C1O) with proportionately high capacitance, an adjustable resistor (R11) has a low forest level for changing the sound intensity and a dynamic loudspeaker (H), to which the electrochemical capacitor (10) discharges via the adjustable resistor (R11) at the time the thyristor (T) is switched through, that the membrane of the loudspeaker (H) is then repelled so that the • Opening of the thyristor (T) by the electromotive Counterforce of the membrane is controlled and that this Circuit generated free vibrations of the membrane, so that these generated one with the soloher kind Vibrations produced matching tone. 009886/0277