DK148640B - BELL RINGING MACHINE - Google Patents

BELL RINGING MACHINE Download PDF

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Publication number
DK148640B
DK148640B DK529478AA DK529478A DK148640B DK 148640 B DK148640 B DK 148640B DK 529478A A DK529478A A DK 529478AA DK 529478 A DK529478 A DK 529478A DK 148640 B DK148640 B DK 148640B
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clock
switch
oscillation
swing
time
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DK529478AA
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Danish (da)
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DK529478A (en
DK148640C (en
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Frido Strathmann
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Herforder Elektricitaets Werke
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    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/28Bells for towers or the like
    • G10K1/30Details or accessories
    • G10K1/34Operating mechanisms
    • G10K1/347Operating mechanisms for an oscillating bell which is driven twice per cycle
    • G10K1/348Operating mechanisms for an oscillating bell which is driven twice per cycle electrically operated

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor And Converter Starters (AREA)
  • Electromechanical Clocks (AREA)
  • Rehabilitation Tools (AREA)
  • Control Of Electric Motors In General (AREA)
  • Peptides Or Proteins (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Description

i 1486/.0in 1486 / .0

Opfindelsen angår en klokkeringningsmaskine, der har en til klokkeåget koblet drivmotor med en reverseringsstrømkreds, der styres af en med drivmotoren forbundet vendeafbryder med en omskifterindretning, der for hver halvsving-5 ning mellem klokkebevægelsens vendepunkter frembringer et med hensyn til afstanden fra disse vendepunkter indstilleligt ind- og udkoblingssignal for drivmotoren.BACKGROUND OF THE INVENTION The present invention relates to a clock ring machine having a clockwise coupled drive motor having a reversing current circuit controlled by a reversing switch connected to the driving motor with a switching device which produces, for each half oscillation between the turning points of the clock movement, adjustable with respect to the distance from these turning points. and shutdown signal for the drive motor.

I en kendt klokkeringningsmaskine af denne art (DE-AS 10 1080906) består omskifterindretningen ved vendeafbry deren af en med knaster forsynet styreskive, der efter gennemløb af et bestemt stykke af hver halvsvingning i begge svingningsretninger medtager et styreorgan og ved hjælp af med dette samvirkende afbryderkontakter bevirker 15 ind- og udkobling af drivmotoren. Stillingen for hver af de to afbryderknaster, der er bestemt for hver sin svingningsretning og er anbragt på styreskiven, som svinger synkront med klokken, vil da bestemme beliggenheden af indkoblings- og udkoblingspunktet på den tilhørende 20 udsvingsside i forhold til svingningssystemets hvilestilling. Ved forskydning af afbryderknasterne på styreskiven kan man da opnå, at drivmotoren afbrydes, allerede før klokken når frem til vendepunktet ved en udsvingsside, og først tilsluttes igen efter begyndelsen af tilbage-25 svingningen. Klokken vil da altid gennemløbe ændringen af svingningsretningen ved vendepunkterne uden at blive drevet, hvorved klangforholdene ved knebelens anslag ved vendepunkterne forbedres. Den kendte konstruktion har imidlertid den ulempe, at ind- og udkoblingen ved hver 30 udsvingningsside sker ved hjælp af den samme afbryderknast på styreskiven, hvorfor den svingningsvinkel i området ved klokkebanens to vendepunkter, i hvilken klokken ikke drives, er den samme i begge svingningsretninger. Man kan dog ganske vist gøre denne svingningsvinkel, hvor klokken 33 ikke drives, ulige stor på svingningsbanens to udsving- ningssider for opnåelse af en forskellig svingningshøjde på de to udsvingningssider, men man kan da ikke mere 2 148640 opnå en optimal intonation for klokken, idet man da ikke mere fejlfrit kan afstemme svingningsbevægelsen for klokken og den deri svingende knebel til hinanden. Endvidere kan indstillingen af afbryderknasterne på omskif-5 terindretningens styreskive kun foretages ved klokkeringningsmaskinens stilstand, så at man ikke kan variere de drivfrie svingningsområder i nærheden af vendepunkterne, når klokken ringer, og således ikke umiddelbart kan kontrollere den deraf betingede indvirkning på klokkens klang.In a known bell ringing machine of this kind (DE-AS 10 1080906), the switching device at the reversing switch consists of a cam-mounted control disc which, after passing through a certain piece of each half-swing in both pivoting directions, includes a control means and by means of this cooperating switch contacts causes 15 switching on and off of the drive motor. The position of each of the two switching knobs, determined for each direction of swing and located on the control disk, which oscillates synchronously clockwise, will then determine the location of the switch-on and switch-off point on the corresponding swing-out side relative to the swing position of the swing system. By displacing the switch knobs on the control disk, it can then be achieved that the drive motor is switched off, even before the clock reaches the turning point at a pivot side, and only reconnects after the beginning of the reverse pivot. The clock will then always go through the change of direction of rotation at the turning points without being driven, thereby improving the sound conditions at the impact of the squat at the turning points. However, the known construction has the disadvantage that the switch-on and switch-off at each oscillation side takes place by means of the same switch cam on the control disk, so that the oscillation angle in the area at the two turning points of the clock, at which the clock is not driven, is the same in both oscillation directions. However, this angle of oscillation, at which 33 is not driven, can be made unequal on the two oscillation sides of the oscillation path to obtain a different oscillation height on the two oscillation sides, but an optimum intonation of the ocular can no longer be obtained, since then one can no longer seamlessly adjust the oscillation movement of the clock and the swaying gland therein. Furthermore, the setting of the switching knobs on the control disc of the switching device can only be done at the stop of the clock-ringing machine, so that the drive-free pivoting areas near the turning points cannot be varied when the bell rings, and thus cannot immediately control the consequent effect on the sound of the clock.

Der kendes også et til en klokkeringningsmaskines drivmotor bestemt relateringskredsløb, der styres af en elektrisk oscillator (US-PS 2,952,013). Denne oscillator dan-15 nes af et triggerkredsløb med to tidselementer, medens et ved klokkens svingningssystem anbragt svingningsafhængigt afbryderorgan tjener til at tilpasse trigger-kredsens frekvens til klokkens svingningsfrekvens. Dette afbryderorgan har til opgave efter gennemløb af en hel 20 svingningsperiode påny at udløse triggerkredsløbet ved en bestemt svingningsvinkel, der ligger i nærheden af svingningssystemets nulstilling. Fremdrivningen af klokken vil da kun blive afbrudt i området ved ét af svingningsbanens to vendepunkter, medens klokken ved det andet 25 vendepunkt, altså på den anden udsvingningsside, vil blive tvangsført af drivmekanismen også i det dér beliggende vendepunkt. Triggerkredsløbets to tidselementer tjener således kun til fastlæggelse af den svingningsvinkel på den tvangsførte udslagsside, ved hvilken klok-30 kens drivmekanisme omstyres til en sådan retning, at svingningen vendes. Tidskonstanterne for triggerkreds-løbets to tidselementer må derfor afstemmes således til hinanden, at også klokkeringningsmaskinens drivretning omstyres nøjagtigt i vendepunktet på klokkens tvangsførte 33 udsvingningsside. Med denne kendte konstruktion søger man at opnå, at oscillatorens frekvens også ved en ændring af klokkens svingningsfrekvens bringes til syn- 3 148640 kront at følge denne, men ved denne kendte konstruktion søges ikke opnået en forbedring af klokkens intonation.There is also known a related circuit for a clock ring machine drive motor controlled by an electric oscillator (US-PS 2,952,013). This oscillator is formed by a two-element trigger circuit, while a swing-dependent switching means arranged by the clock system serves to adjust the frequency of the trigger circuit to the clock swing frequency. This switch means, after a full 20 oscillation period, has the task of releasing the trigger circuit at a specific oscillation angle which is close to the oscillation system reset. The propulsion of the clock will then only be interrupted in the area at one of the two turning points of the pivot path, while the clock at the other turning point, ie on the other pivot side, will be forced by the drive mechanism also at the turning point located there. Thus, the two timing elements of the trigger circuit serve only to determine the angle of oscillation on the forced-out side, at which the clock drive mechanism is directed in such a direction that the oscillation is reversed. Therefore, the time constants of the two timing elements of the trigger circuit must be aligned so that the driving direction of the clock machine is also accurately reversed at the turning point on the clockwise 33 oscillation side of the clock. With this known construction, it is sought to achieve that the frequency of the oscillator is also caused to be followed by a change in the frequency of the clock, but this improvement does not seek to improve the intonation of the clock.

Opfindelsen har til formål at forbedre en klokkeringnings-5 maskine af den indledningsvis nævnte art ved hjælp af en elektrisk omskifterindretning, der ved begyndelsen og slutningen af hver halvsvingning mellem klokkebevægelsens to vendepunkter gør det muligt at opnå hver for sig indstillelige, drivfrie svingningssektorer, så at man altså 10 på hver udsvingningsside kan fastlægge drivfrie svingningssektorer, der er forskellige for de to svingningsretninger, hvorvéd man under ringning kan foretage en optimering af klokkens intonation og endvidere kan opnå forskellige svingningshøjder ved de to sider.The invention has for its object to improve a clock ring machine of the kind mentioned above by means of an electric switching device which at the beginning and end of each half-swing between the two turning points of the clock movement makes it possible to obtain separately adjustable, drive-free swing sectors. that is, 10 on each oscillation side one can determine drift-free oscillation sectors which are different for the two oscillation directions, whereby during the ringing an optimization of the clock intonation can be made and further oscillation heights can be obtained at the two sides.

1515

Dette formål opnås ved klokkeringningsmaskinen ifølge opfindelsen, der er ejendommelig ved, at omskifterindret-ningen har to adskilte elektriske tidselementer, der på basis af et af vendeafbryderen i det aktuelle vendepunkt 20 afgivet startsignal for hver halvsvingning frembringer indkoblingssignalet og udkoblingssignalet hver for sig på af hinanden uafhængigt indstillelige tidspunkter.This object is achieved by the clock-ringing machine according to the invention, characterized in that the switching device has two separate electrical timing elements which, on the basis of one of the reversing switches at the current turning point 20, produce a start signal for each half-swing and the switch-off signal separately from each other. independently adjustable times.

En særlig fordel ved klokkeringningsmaskinen ifølge op-25 findelsen består i, at man på klokkens to udsvingnings- sider uafhængigt af klokkens svingningshøjde kan variere de drivfrie sektorer i nærheden af vendepunkterne og således variere klokkens drivfrie bane både før og efter knebelanslaget. Denne indstilling kan foretages, medens 30 klokkeringningsmaskinen er i funktion, så at man særlig let kan justere klokken til dens maksimalt opnåelige klangkvalitet. Denne justering kan eksempelvis ske fra en styrecentral, der er rumligt adskilt fra klokkeringningsmaskinen, og den kan til enhver tid gentages efter 33 behov.A particular advantage of the bell ringing machine according to the invention is that, on the two oscillation sides of the bell, independently of the bell height of the bell, it is possible to vary the drive-free sectors near the turning points, thus varying the bell-free path both before and after the knee impact. This setting can be made while the 30 ring clock machine is in operation so that the clock can be adjusted very easily to its maximum achievable sound quality. This adjustment can be done, for example, from a control center that is spatially separated from the clock ring machine and can be repeated at any time according to 33 needs.

4 148640 I en fordelagtig udførelsesform for klokkeringningsmaskinen ifølge opfindelsen består tidselementerne hver især af et via vendeafbryderen til spænding forbundet tidsrelæ med hver sin tidskontakt, der ligger i styrekredsen for et tilhørende motorværn i reverserings kreds-5 løbet. I denne udførelsesform har tidsrelæernes tidskontakter en indstillelig indkoblingsforsinkelse og indkoblingsvarighed. Et konventionelt reverseringskredsløb kan dermed omstilles til en omskifterindretning ifølge opfindelsen med adskilte elektriske tidselementer.In an advantageous embodiment of the clock-clocking machine according to the invention, the time elements each consist of a time relay connected via the voltage switch to the voltage switch, each with its own time contact, which lies in the control circuit for an associated motor protection in the reversing circuit. In this embodiment, the time switches of the time relays have an adjustable switch-on delay and switch-on duration. A conventional reversing circuit can thus be switched to a switching device according to the invention with separate electrical timing elements.

Vendeafbryderen er desuden fortrinsvis en via en glidekobling af 10 drivmotorens rotor styret omskifter, hvorved opnås en nøjagtig registrering af klokkens vendepunkter og dermed bestemmelse af startsignalet.Furthermore, the reversing switch is preferably a switch controlled by a rotary coupling of the rotor of the drive motor, thereby obtaining an accurate recording of the turning points of the clock and thus determining the start signal.

I det følgende vil en udførelsesform for klokkeringnings-15 maskinen ifølge opfindelsen blive nærmere forklaret under henvisning til tegningen, på hvilken fig. 1 viser klokkeringningsmaskinen skematisk og fig. 2 et koblingsdiagram for omskifterindretningen.In the following, an embodiment of the clock ring machine according to the invention will be explained in more detail with reference to the drawing, in which FIG. 1 schematically shows the clock ring machine and FIG. 2 is a circuit diagram of the switching device.

20 En klokke 1 (fig. 1) drives ved hjælp af en på klokkens aksel 2 anbragt tovskive 3 via et tov 4 fra en elektromotor 5. Elektromotoren 5's aksel er gennem en glidekobling (ikke vist) forbundet med en vendeafbryder 6> der på kendt måde kan være udformet som mikroafbryder eller 25 kviksølvafbryder. Ved begyndelsen af en ændring af elektromotoren 5's drejningsretning føres den som omkobler udformede vendeafbryder 6 til en for den pågældende drejningsretning karakteristisk stilling. Vendeafbryderen 6 styrer over en eventuelt længere ledning 8 en omskifter-30 indretning 7, der er forbundet med et betjeningsapparat 9, som for hver svingningsretning Li og Re har en regulator til regulering af startforsinkelsen og indkoblingstiden for klokkens drivmekanisme. 1A bell 1 (Fig. 1) is driven by a rope disc 3 mounted on the bell shaft 2 via a rope 4 from an electric motor 5. The shaft of the electric motor 5 is connected through a sliding coupling (not shown) to a reversing switch 6 way can be designed as a microswitch or 25 mercury switch. At the beginning of a change in the direction of rotation of the electric motor 5, the reversing switch 6, which is designed as a switch, is moved to a position characteristic of that direction of rotation. The reversing switch 6 controls over a possibly longer line 8 a switching device 7 which is connected to an operating device 9, which for each swing direction Li and Re has a regulator for controlling the start delay and the switch-on time of the clock drive mechanism. 1

Omskifterindretningen 7 (fig. 2) består i det væsentlige af et elektronisk styret tidsrelæ, henholdsvis R·^ og R2, 148640 5 og et motorværn, henholdsvis og C2, f°r hver svingningsretning. Tidsrelæerne R1 og R2 har hver især en slutafbryder, henholdsvis ^ og r2, medens motorværnene Cl og C2 hver især har en åbneafbryder, henholdsvis c-^ 5 og c2^,samt hver især har tre slutafbrydere, henholdsvis c12' c13' c14 c22' c23' c24’ 1 str^nltilfiirse3-sle^“ ningen fra en klemme Ph til vendeafbryderen 6 er der anbragt en tænde-slukke-afbryder 10. Vendeafbryderens klemme 6 a er forbundet med tidsrelæet R-j^ og s lutafbryderen 10 r^, og vendeafbryderens klemme 6b er på tilsvarende måde forbundet med tidsrelæet R2 og dettes slutafbryder r2·The switching device 7 (Fig. 2) consists essentially of an electronically controlled time relay, R 1 and R 2, respectively, and a motor protection, respectively and C 2, for each direction of swing. The time relays R1 and R2 each have a circuit breaker, respectively ^ and r2, while the motor protectors C1 and C2 each have an open circuit breaker, c- ^ 5 and c2 ^ respectively, and each has three circuit breakers, respectively c12 'c13' c14 c22 ' c23 'c24' 1 switching from a terminal Ph to the switch 6, an on / off switch 10 is provided. The terminal 6a of the reversing switch is connected to the time relay Rj and s the switch 10 r terminal 6b is similarly connected to the time relay R2 and its final switch r2

Slutafbryderen r^'s kontakt er via motorværnet C2's åbneafbryder c2^ og motorværnet ^ tilsluttet strømforsyningens nulleder MP. På lignende måde er lukkeafbryde-15 ren r2's kontakt via motorværnet C-^'s åbneafbryder og motorværnet C2 tilsluttet nullederen MP. Lukkeafbryderne c^2, og forbinder drivmotoren 5 med trefase-strømnettet RST for drejning til venstre, medens slut-afbryderne c22, c22 og c2^ forbinder drivmotoren 5 til 0 trefasestrømnettet RST for drejning til højre.The contact of the end switch r ^ is via the open circuit breaker c2 ^ of the motor protection C2 and the motor protection ^ is connected to the neutral conductor MP of the power supply. Similarly, the circuit breaker switch R2's contact is via the open circuit breaker C2 and the circuit breaker C2 is connected to the neutral conductor MP. The shutter switches c ^ 2, and connect the drive motor 5 to the three-phase power grid RST for left turn, while the end switches c22, c22 and c2 ^ connect the drive motor 5 to 0 three-phase power grid RST for right turn.

Vendeafbryderen 6 står i fig. 2 i den stilling, i hvilken den driver klokken i svingningsretningen mod højre (Re) .The reversing switch 6 is shown in FIG. 2 in the position in which it drives the clockwise direction of rotation (Re).

Når afbryderen 10 er sluttet, virker tidsrelæet R^ med 25 en på regulatoren 11 indstillet tidsforsinkelse og slutter gennem sin slutafbryder r^ en strømkreds fra klemmen Ph gennem vendeafbryderen 6, slutafbryderen r^, hvilekontakten c2^, det første motorværn C^'s feltstrømvikling til klemmen MP. Motorværnet C. aktiveres og tilslutter 30 via sine slutafbrydere c^2, og drivmotoren 5 til strømforsyningen. Drivmotoren 5 går igang og svinger klokken i svingningsretningen mod højre. Den kan imidlertid endnu ikke drive klokken til dens fulde svingningshøjde, men går tværtimod som følge af klokkens vægt snartWhen the switch 10 is closed, the time relay R ^ acts with a time delay set on the controller 11 and terminates through its end switch r ^ a current circuit from the terminal Ph through the switch 6, the end switch r ^, the rest switch c2 ^, the first motor protection C ^ 's field current winding. to the clamp MP. The motor guard C. is activated and connected to 30 via its circuit breakers c ^ 2, and the drive motor 5 to the power supply. The drive motor 5 starts running and turns the clockwise direction to the right. However, it cannot yet operate the clock to its full oscillation height, but on the contrary, due to the weight of the clock will soon

O CO C

i stå og bliver tvunget til at ændre omløbsretning. Derved bliver vendeafbryderen 6 straks omskiftet, det første tidsrelæ R^ og dermed også motorværnet afbrydes, og det andet tidsrelæ R2 tilsluttes spænding og aktiveres 148640 6 med en på regulatoren 12 indstillet tidsforsinkelse og slutter ved motorværnet C2 drivmotoren 5 til trefase-strømnettet for drejning til venstre. Klokken drives nu i svingningsretning mod venstre (Li). Det beskrevne for-5 løb gentager sig, og efter nogle få svingninger har klokken nået den ønskede svingningshøjde. De elektronisk regulerede tidsrelæer og R2 er således konstrueret, at aktiveringstiden eller indkoblingstiden kan indstilles ved hjælp af regulatorer, henholdsvis 13 og 14. Slut- 10 teafbryderne, henholdsvis r-^ og r2, åbnes afhængigt af den ved hjælp af regulatorerne 13 og 14 foretagne tidsindstilling, også når tidsrelæerne stadig er påført spænding, men de åbnes imidlertid straks, når spændingen til tidsrelæet afbrydes, hvilket er tilfældet i startfasen, 15 før den fulde svingningshøjde opnås.stalled and forced to change direction of rotation. Thereby, the switch 6 is immediately switched, the first time relay R 1 and thus also the motor protection is switched off and the second time relay R2 is switched on and activated with a time delay set on the controller 12 and terminates at the motor protection C2 the motor 5 for the three-phase power grid for turning left. The clock is now driven in the direction of swing to the left (Li). The described pre-5 race repeats itself and after a few swings the bell has reached the desired swing height. The electronically controlled time relays and R 2 are designed so that the activation time or switch-on time can be set by means of controllers 13 and 14, respectively. The final switches, r 1 and r 2, respectively, are opened depending on the operation made by controllers 13 and 14. time setting, even when the time relays are still applied voltage, but they are immediately opened when the voltage for the time relay is switched off, which is the case in the starting phase, 15 before the full oscillation height is reached.

Med den omhandlede omskifterindretning opnås, at man for hver svingningsretning uafhængigt af hinanden ved hjælp af regulatorerne 20 11 og 12 kan indstille tidspunktet for tilslutning af drivmotoren efter retningsændringen, og før opnåelsen af den ønskede svingningshøjde ved hjælp af regulatorerne 13 og 14 kan indstille tidspunktet for afbrydelsen af drivmotoren, så at klokken kan foretage frie udsving og vende svingningsretningen. På denne måde kan klokkens intonation 25 justeres optimalt.With the present switching device, it is achieved that, for each direction of rotation, it is possible to set the time of connection of the drive motor after the change of direction independently of each other by means of regulators 20 and 12 and before the attainment of the desired vibration height by means of regulators 13 and 14 can be set. the shutdown of the drive motor so that the clock can make free swings and reverse the direction of swing. In this way, the clock intonation 25 can be optimally adjusted.

DK529478A 1977-12-19 1978-11-27 BELL RINGING MACHINE DK148640C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2756661A DE2756661B2 (en) 1977-12-19 1977-12-19 Bell ringing machine
DE2756661 1977-12-19

Publications (3)

Publication Number Publication Date
DK529478A DK529478A (en) 1979-06-20
DK148640B true DK148640B (en) 1985-08-19
DK148640C DK148640C (en) 1986-02-03

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Application Number Title Priority Date Filing Date
DK529478A DK148640C (en) 1977-12-19 1978-11-27 BELL RINGING MACHINE

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AT (1) AT367224B (en)
BE (1) BE872851A (en)
DE (1) DE2756661B2 (en)
DK (1) DK148640C (en)
FI (1) FI59307C (en)
FR (1) FR2412132A1 (en)
GB (1) GB2010564B (en)
LU (1) LU80668A1 (en)
NL (1) NL182588C (en)
NO (1) NO144053C (en)
SE (1) SE7812731L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3505062A1 (en) * 1985-02-14 1986-08-14 Herforder Elektricitäts-Werke Bokelmann & Kuhlo GmbH & Co., 4900 Herford BELL BELLING MACHINE
DE3701828A1 (en) * 1987-01-23 1988-08-04 Stuehrenberg Rolf Control device for bell-ringing machines (chime machines)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH102158A (en) * 1923-02-27 1924-04-01 Muff Johann Device for driving church bells.
US2952013A (en) * 1955-08-19 1960-09-06 Josef Pfundner Bell ringing machines
DE1017956B (en) * 1955-08-19 1957-10-17 Josef Pfundner Glocken Und Met Bell ringing machine
CH340737A (en) * 1956-06-01 1959-08-31 Muri Jakob Bell ringing machine
DE1080906B (en) * 1958-12-12 1960-04-28 Herforder Elek Citaets Werke B Device for either swinging or circular sounds of bells
CH400844A (en) * 1963-04-17 1965-10-15 Johann Muff Elektro Ingenieur Bell ringing device
BE663326A (en) * 1965-04-30 1965-08-17

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NL7812272A (en) 1979-06-21
NO784250L (en) 1979-06-20
GB2010564A (en) 1979-06-27
DK529478A (en) 1979-06-20
ATA266678A (en) 1981-10-15
AT367224B (en) 1982-06-11
DE2756661A1 (en) 1979-06-21
FI59307C (en) 1981-07-10
NO144053B (en) 1981-03-02
DE2756661B2 (en) 1979-10-18
NL182588B (en) 1987-11-02
SE7812731L (en) 1979-06-20
LU80668A1 (en) 1979-04-13
NL182588C (en) 1988-04-05
DE2756661C3 (en) 1987-10-22
FI59307B (en) 1981-03-31
BE872851A (en) 1979-04-17
DK148640C (en) 1986-02-03
FR2412132A1 (en) 1979-07-13
FI783302A (en) 1979-06-20
FR2412132B1 (en) 1985-04-12
GB2010564B (en) 1982-02-03
NO144053C (en) 1991-03-26

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