DE6806405U - SWITCH FOR AN ELECTRICAL PROTECTIVE DEVICE. - Google Patents

Description

DR. BERG DIPL.-1NG. STAP.F

PATENTANWÄLTE 8 MUNICH 8O. MAUERKIRCHERSTR. 45

Dr. Berg Dipl.-Ing. Stapf, 8 mouths 80, wall! : rcherstroße 45

Your sign

Your letter Our reference 17 595 ^Date Sr US, 1971

£ 6 £ OIL · ¹ ^ oS. / J
Attorney file 17 595

American District Telegraph Company New York, New York I00I3 / '-'3A

Electrical protection system

The invention relates to an electrical protection system for protecting commercial and administrative buildings and factories as well as other buildings. Generally are to be protected

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Buildings are provided with a local alarm bell or are connected to a Rlizei- or Wachzeritral e or to a central station. In the former case it signals loudly »:, a bell in or ο ei the slotted building. <=> :. nlarm. In the latter case, an alarm condition to a central station or another becomes. Crt signals where .-, eighth or police officers are doing harvest duty, so aai this quickly becomes the "cause of the marrni; ascertainer: ■ 'c ι. Η e η.

// End of business hours, i.e. possibly true of the day and / or earlier. Vt, end, cev the protection intended for the buildings is completely switched off ^ the white trehena. On Fr.de of Geschäftsstur.de :. v ^ rce :. dip doors and windows closed and Irmer.schu tzvorr! chtu r.gen, 7,.? -. Faller, and photoelectric ^ r executions .geschaltet!. The person who is the last to leave the building must check the electrical, complete /,'ir-isa.T.rreit of the protection system. Then, if the exam is satisfactory, that person must leave the building. Since the exit door is normally protected by door ontaite, opening the door to leave the building would signal an alarm either at the r.rt or at the central station or the police headquarters, if not facilities

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;; ur I. r.t ^ rdrvic-. Such an alarm is provided s i i'.ci.

'· .-. became eir.o multitude of different r. i nr ichtu r.gen and Seh ^ i tu r.ger. for the suppression of: the triggering of an alarm signal It is provided for a period of time after the protection has been switched on so that the alarm can be exited is possible without the transfer of an Alariis i ^ nal. Lie = iγι most widespread device has a timer to which person is activated by c: i e the person switching on the protection after the dip check of the complete '/.'ir-c collects the system y Lr esc hl o? sen is. Such facilities work well but have disadvantages /, u own. > for example, the separate actuation of a Time switch will be forgotten, which then leads to a wrong one An alarm is triggered when the person leaves the building. The danger of this is greatest when the test mechanism and the Time mechanism are in different places, what usually is the case.

With regard to testing the electrical, full effectiveness of the protection system after switching a switching device with several switching positions in one of the switching positions and also ensuring the required time delay after switching the same switching device

into a -inupre of Sc p.fil f 1 ίγρ;:, ut. des leave the protected- :: building o'r.: i ° mURJcfp :. before; Al ^ rm will allow rp-.n; '.? .. Invention pi :: ^ l ρ etrLsches system for protecting G ^ Läu der: -.- psc rvi ff er., Which at least a plural before; ° 1 c-i '"tr ischp ;; Schu ti', ei nr L ei .ti: nren nufveist. At least one of the protective devices protects a device that allows access to or exit from the building, whereby This protective device is actuated after opening this device. The invention is characterized by a switching device with an "Off", "Check ¹ " and "On" switching position, which can be switched from one to another switching position in succession , an alarm signaling device for generating an alarm signal after excitation and an electrical circuit with a capacitor, which has a charging circuit and a discharging circuit with a predetermined Zleit-ronstante. The electrical circuit connects the switching device, the protective devices and the alarm signaling devices in such a way that (a) in the "off" switch position of the switching device, the capacitor is charged to full charge by its charging / circuit, that (b; in the "check.""-Switching position of the switching device, the capacitor is discharged through its discharge circuit and the alarm signaling device with energy

is fed, and that (c ^ in the "Ar." - switch position of the Switching device the one electrical protective device during the by the time constant of the discharge circuit a certain period of time is effectively bridged during which Time the alarm signaling device de-energizes or is not supplied with energy.

The electrical protective devices preferably have output contacts which are operationally connected to the devices allowing access to or leaving the building. The I: inrichtur.rer. have a door that moves the intact at their rffr ^ r: from a Hf ¹ Hd.

Further aims and advantages of the invention v.'erce :. from the following. Description in connection with the be i _t ' ^a f' igte-. Drawing visible.

Fig. 1 shows a schematic diagram of a first nut guide according to. Invention.

Fig. Egg scr err "diagram showing a modification of the circuit shown in FIG. 1.

Flg. <shows a schematic circuit according to another

further embodiment of the invention.

Reference is now made to the drawings and in particular to Referring to Fig. 1. The protective circuits for the protective buildings are shown schematically by the .- '. asten Io and the dashed line 11 is shown. Any desired number of protective devices, which are connected in series, be indicated. Such protective devices could typically Door contacts, window foils, traps and often more complicated ones Be protective devices as they are known in the art. Among the devices of the series connection 11 is a set of door contacts 12, which the exit door protects, and which is opened when the exit door is opened. The contacts 12 are through a Set of normally open relay contacts 32 of a relay bridged.

For the following description it should be assumed that the "normal" state of the circuits and switches in of the various figures is the "off" or "day" state, i.e. the state with the least protection in which some or all of the protective devices are ineffective. In its "off" state, a control switch takes 3W, the formed by a pair of coupled switches SW1 and SW2

is, the switching position shown in Fig. 1 is a. In this case, the movable contact 13 is connected to the "test-off" contact I ¹ + of the switch SV / 2 and the movable contact 15 is connected to the "off" contact 16 of the switch SV / 1. When the coupled switches are switched to the "test" position, the movable contact 13 remains in contact with the contact I ¹ + and thus closed with it, while the movable contact 15 moves away from the contact 16 and then on the "test" -Off "contact 17 of the switch SW 1 is applied or is closed with this. When the veroundenen switches are moved to the "on" position, ie the position with the highest possible S-protection or the "night" position, the movable contact 13 ^{is moved away from the contact I 1} + and then lies on the not switched on " Arfi-Xonta * t l6 of the switch SW, while the movable contact 15 still rests on the contact 17.

A suitable source, for example the 6-volt battery 19, is connected via a conductor 2o to the contact IH of the switch SW 2, the movable contact 21 of the contacts A! 1 of the alarm relay AL and positive potential is applied to the switch.gspur.kt R. The negative Ίρτηπρ of the battery 19 is or. a conductor 22 connected.

The relay AL is normally excited by its normally open contacts Ai, 1, with the circuit from the positive terminal of the battery 19 via the conductor 2o, the movable intact 21, the working contact ALI, the protective circuit 1Ϊ (with the Door contacts 12), the coil of the alarm relay ^; -.L and the conductor 2? Leads to the negative terminal of the battery 19. When the power is switched on for the first time (or when the contacts 12 are closed after they have been opened), the relay AL is energized by the other circuit, which the movable contact 13 and the "off" contact lh of the coupled switch SV / 2 and the movable contact 15 and the "off" contact 16 of the coupled switch SVJl, the protection circuit 11 , the coil of the alarm relay AL, the conductor 22 and the negative terminal of the battery 19 has.

When the coupled. Switch SV / 1 - / 2 their "off taking SV ^u layers, the scarf tu nrspu a \ ~ t ~ is on positive potential and the capacitor CDI is the Pa sis Erritter-Krei s of an otherwise non-conductive transistor TPK2 with a resistor PiX5. Typical values for the capacitor CDI, the 'resistor RX? given only for explanation and should lead to k <= i: .p: ^re limitation of the invention. In dpr Ze ichnun- ·? ':. ci

typical transistors indicated, tie rectifiers Can all be Linden type I *. *, 2o? o.

Between de.T contact 17 and the negative potential lying Leiöer 2: an alarm bell 23 is switched. Parallel to the bell 25 is a series of a circle Rectifier RSC2, a resistor R X ^ and normally open - '. contacts Rl of a relay?.

The node B can be connected to the junction of the resistor RX7 and the rectifier REC? and connected to the collector of a transistor TRNl by means of normally open contacts Sl of a relay S. The base of the transistor TRNl is connected to the junction between the resistor RX7 and contacts Rl, while the emitter of the transistor is connected to one side of the coil of the relay 3. ^{A rectifier REC 1} + is located above the coil of the relay S so that voltage peaks during operation of the relay coil S are suppressed. A rectifier REC5 is connected between the collector of the transistor TRX1 and the conductor 2c , which is at negative potential, so that the transistor is protected from voltage peaks.

If the relay S in the Wei

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is excited, a positive potential is applied to a node A through the normally open contacts 31. Between point A and the conductor 22, which is at negative potential, there are two series circuit tu r.peU. One is formed by the resistors RX2 and RX ¹ +, the "collector emitter - :: rice of the transistor TRIJ2 and a resistor RX5. The other is formed by a rectifier REC1, the emitter-" oll e: -: tor -Circuit of a transistor TR.'P and the coil of the relay R formed, jber the coil of the relay R is a rectifier REC3, which is used to suppress spa rmungspitzen when the relay R is operating.

The connection of the resistors ΠΧ2 and BXh is connected to the base of the transistor TR:; 3. The emitter of the transistor TRN2 is connected to the emitter of the transistor ΤΡΓ. ^Τ 3 doubled via a resistor RX3. The transistors TRN'1, TRN2 and TR; '3 are normally non-conductive, unless the charging current flows in the manner described above through the easiest-erri tter-Strec ^ e of the transistor TRI.'2 .

When the control switch SW from its "off" position to its "Check" position is moved, switch 3W2 does not switch around, but only the switch 3Wl. This means that the consortium

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tatit I ^r? positive potential a rip el eg t. Through this? positive pritp. '. ti -ι j *: · ■ ' Ontakt 17 the Gloc; e ._ ^ tetätirt, s ^ ct .; uif 'u «r. Switch beta ti ^ et.ue Pers ~> :. (uinse soli d «r: · i rif-jcr. rf it halter ^ i ?. I'.i ρ er: t ^; jT ^ r denotes werc>. ^r /, w · = · i ir-,; ■■ :.;,: '·]; R ■ · ■ ^c revenge! £' ■■ · TM. Ο; t ^ t.

: - c. r ~ r,.: -. ; ί -η 'r.tn-: t 1 ""' ρ · ρ: Μ \ · »γ P-te-.tir,] nnliprt, flows.", tr- "" C '.; rcr :. *'^;...: J ei chr i cl't ^ r ■: · "'d ⁿ r. .v'iaers ta: ic Ι <, λ '" ⁷ , ci« = ·' --iei "- l -. 'T: i tt rr-C' r? c ^: 'ip des ^ r -;:. : · I.- ι ^ rs Tii-il u: ia the coil ei ο r.; "; ■.! F .'j, -j r. (I = o, jt ■, ·; Ire: c: t T ι · ί: .sis tor TR: H ge ^Q ; j ^c : ~ t. .Ι - '. ·, Η cinr Try: .si ^ tor ΤΓ- .'1 i'e? Poist will, v; is that: ■ ";";;; ■ J reached, wu.'ei ^c s γο ^; _ ·. <= "oi.t ^ 'te Sl and 32 closes.

ί-i "/""it ^ r * te ^H: He it b move the Au sgaripstür ^ onta · t 12, and soTiit ar. aer Eip he; Tumer the üEbaude without tripping.. leave an alarm signal when the contacts 12 are open due to the open position of the Husgangstur.

By closing the contacts Sl, the relay S is held in its energized state by itself by directly positive potential is applied to the collector of the transistor TRl. By closing the contact Sl is also direct positive potential at circuit point A. created. Thus, when the control switch SW is in its "on" position is switched, in v / which the moving contact

to the. offV'-. lying. "'or: t3Kt 18 is present, and thus that positive potential v ^ r: d ° r: i peasant \ onta ': t 15 switched off wire, Lie ibt epr T τ ···. .s is tor TRi.'l conductive, remains helois S prrert and remains the circuit trace A on positive Patent i · ': ·. j. The polarity of the rectifier REC2 is such that he bewiriaei, ei «.? a positive potential through the contact 31 is applied to the bell 23.

By switching the SV / switch to its "on" position, the bell 23 is also silenced by its operating potential at the movable '' onta- <t 1? Will get removed. Under these circumstances, after the bypass switch S2 has been opened after the relay 3 has been de-energized, the bell 23 works only if the protective circuit 11 is opened, through which the alarm relay Al. drops and moves its armature to reset the contact ALI, so that the bell ? 2 via the movable: 'onta: t 15 u'id der; contact 17 of the switch SWl positive potential is applied. A safe opening represents either a failure of the circuit or an alarm and requires rechecking. As is already known in the art, when the system is connected to a central station, the bell 23 is normally disabled during the "on" or "night" state, and the alarm signal which is given when the relay drops out AL occurs, without Lr-

680840516.3.72

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zeugu: .g a noise caused by the A 1-irmrela iskorita kte and ρ ine ir, a signal is not shown for an indication to the central et. station transferred.

As soon as the switch SW i: ". His"Pr'i f er. "- l.-i, fe. Is switched on and the movable " r \ Xn'tt l ^r : is applied to the \ ontakt 1 '·' begins the discharge of the capacitor CDI through the V / resistance RXl. The discharge of the capacitor CDI can best be seen by examining the voltages at the various relevant points in the circuit. If the circuit is in its *: nomaifr. "-ius" state, the \ onder.ss tor CDI is ^{charged to about c} ;, 5 volts. The remaining ^, 5 V '. Td "r power fa''le :. above', the Pa viderstand [sF.rr it ter-3trecke of Trnnis 1 st.ors?

TR.'ii from. If oer switch

. . ·. ■ ι ■ :. d ι e

Hip ''

Fr; fe: "." - L '"re moved

is, and thus "... the point r ■ '- 6 a positive potential V • -inge ¹ is egt, a 3tnr is: WY-n zj at a negative potential lying Deiter 2." about the:. . Rectifier RECL, the resistance HX / and 'resistance RX "created ^._; via the rectifier RECL egg falls: · ^ voltage v <~> n about o, 5 V from, so that two of the voltage drop across the resistor RX3. about.

As for the voltage drop between the point P and the on

If conductor 22 is located at a negative potential, there is a voltage of 5.5 V across the capacitor CDI and a voltage of 2.5 V across the resistor RXv, which results in a total of 0.25 V. That is the power supply only emits a voltage of ο V, the capacitor CDI must discharge so that an equilibrium is established in the circuit. There are two possible discharge paths for the capacitor CDI. The first leads via the V / id erstand RXl. The second leads via the contacts 31 , the rectifier RECl, the resistor RX3 and the base-emitter path of the transistor TRN2. Since the blocking resistance of the base-emitter path of the transistor TRN2 is much higher than the resistance value of 1 yo K Chm of the resistor RXl, A very small current flows through the second current path. Thus, the discharge time constant is essentially determined by the capacitance of the capacitor CDI and the resistance of the resistor RX 1. For the example shown, the time constant is 1 minute.

Due to the charge of the capacitor CDI, a reverse voltage is applied to the base-emitter path of the transistor T ^P M2, which prevents a base current from flowing until the charge has become sufficiently low that the voltage drop across the resistor F. .X5 generated Vn rwartsspannartig is greater than the reverse voltage. If so

the charge of the capacitor CDI is reduced to 2.75 V, if there is no reverse voltage at the transistor TRÜ2, it becomes conductive. The through the ^ ollelctor emitter -'rei s des Transistor TRÜ2 flowing current Iä2t the transistor TF.;: 3 go into the conductive state. The transistor T? ./? was up to the conductive state of the transistor TRX2 in non-conductive state through the gps to the emitter Transistor TRN3 applied via the rectifier RECl Reverse voltage.

When the transistor TRIP · becomes conductive, flows through his EmittpT "-; 'olleKtor-Kreis a current exciting the relay R, whereby the normally open. "cntal-; te Rl closed will.

. Duron the Close of Rl Tontate the base of the transistor TRI] to the on is:. <?, ^r gt IVEM potential conductor lying 2 is connected, whereby the transistor becomes non-conductive TRIiI?. With the volatility of the transistor TR:.! the relay 3 drops out and opens its - 'intact 31 and 32.

Lurch d3ö Open aev . ''Ontg'ite 32 wirci der überbrüc -: unrsstroTiWPfum aer: T ^: ir- \ cnta '<t 12 opened, and the protection cev Husgangstür wipüer h.pr.-est el 11. The exit -

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door contact is bridged for a period of time which is from the discharge time constant of the capacitor, e.g. 1 minute, depends, whereby a period of time is created which

allows the owner to leave the building and the Close the exit door behind you.

Through the opener. the 'contacts S2 is the giving tronweg- um the. 'Capacitor CDI opened, causing the latter again can be charged. The charging takes place immediately through the base-emitter path of the transistor TP..2. By opening the 'contacts S1, the one above also disappears Point A to the transistors TRX 2 and TRi :? created -KoI-lektorspa so that both Trans [store :: become non-conductive. As a result of the non-conductive state of the transistor TRIP, the relay R is de-energized. , Due to the excitement of the Relay R opens contacts Rl, which puts the system in has reached its static "on" protection status.

[n Fig. 2 is a slight modification of the circuit of Fig. 1, in which the function of the relay R is carried out by an additional transistor. Same 3 reference symbols denote in de :. Figures 1 and 2 are the same E] em en te.

I ·: Fig.. '^; SIr ₁ (J the coil of the relay R and the rectifier

i \ EC? replaced by Widerstar.de RXc and RX9 connected in series. The normally open "ontal: te .1 are through de .:";'oll ei tor-Frri tter -.-' rice of a transistor TR.'I k replaced. The base of the transistor TRi.'U is connected to the junction of the resistors RX3 and RX9.

Ler transistor TRi; ¹ + is normally non-conductive until it is caused by the voltage drop across resistor RX8, which is caused by the flow of current. in the emitter-KoIleKtor-circuit of the transistor TR "3) when the latter becomes conductive, caused, is forward biased. When the transistor TR: lh is saturated by the base current obtained from the Fmitter ->'oll ektor-circuit of the transistor TRX3 becomes, the base of the transistor TRi: i reaches a potential which is essentially the same as that of the conductor 2. The transistor TRM therefore becomes non-conductive (as was the case in the embodiment according to FIG Rl were closed ', whereby the relay 3 drops out.

After the relay 3 has dropped out, the capacitor CDI begins to charge, and by opening the contacts S1, the transistors TR:. '2 and TRi ^ get into their non-conductive state, as has been described in connection with FIG. When the transistor TE '. "3 becomes non-conductive, the transistor Ύ?. ·' Μ again becomes non-conductive.

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In Fir. 3 is a modified time ^{switch according to ";} rflncu: .r re shows. Those elements in FIG. 1 which correspond to those of FIG Apostrophe: verses ¹ - « ⁵ : are. Ir: Fig. 3, the 3-l-> 3r en-tax switch ^" S .. ' ¹ an additional ·', movable \ onta - t 2h-, ei : ct. "Fr ^! ;:" En-Au.3 "- -''-! .- it a λ t 2 ^C · and an of fe: il i miserable" An ^u : o: .tn 't: ^v , soft one additionally ⁰ :. re: uppel ten switch SVJ " ¹ cilr:« -: ..

Ji "circuit by Fir.; Is shown in its normal .." Aus "- /. Ust ^ i.nc, where 6 ^c v control switch SV / ^f assumes its" Aus "-i age. Hs fli ^rj : it e! n Stror: von de ^T - positivpn "\ p?, - Ti e der patteri« ⁵ 19 'over a «:, i] r _: rmrel a 13-Λ rbeitsXontg ^ t»' l ¹ , a '/ rribi mti ~ -r. -uiz ^r - [\ ^c - · " P- ^ t '-. nt i-Bidder H) I" and e' ·. « ¹ " -. '/ i cersta nd HZIl ₁ a «= :. <-r . ~ '' = · ^"c \ 1 11 'of the protection circuit," inen /.weiten part J]' ^one of the protective circuit, "" coil oes Alarmrel ί is _t L ^f l:!:. 'c cie on nefstivem Potentir -1 Ii er end return door: n ^r 22 'to the negative Qemme of the "^ tterie 19" · The first "part 11" of the protective circuit has the exit door: ontn: t ° 12'.

Via Zeitsteuer eru ngsngsnonaensa tor CLl 'is normally charged by being connected to the positive terminal of the battery via a conductor 2 ", with the charging circuit via the P.asi 5-ί τι tter-5trec. <e of the transistor TEMl ¹ , a contradiction ta ηα 'Λ' /.} ¹ and the return conductor 22 'leads.

λο. '. ι. the control switch 3'λ ' ¹ rr.it three areas' - "nr.ta'ctea • from? e ^! :. ° r" · ■. us "-i 3fe ii. be;. °"Pr'if ^ "'." - L =) f ^o rpso' ^r ^ l tet; ¹ M rc ^{,: .o * n} ft only opt · [.f ..; f't "l! C ::« ~ \ t · -): t] ^rl . 3 " ^rr! . t Π MM p \ :. .Mr- ::: \ ^ r ο Μ "'—.MiM · - Z. "',.Ml', M. ^ ', ti ^. j '. ⁿ : r · '· "ric: * rr ■. MlTI' u: c ei?!:". W ^ Wx- ν e; 3ch'j 1 ⁺ et ^ r. .. 'i der- ■■■ ·. ^: ..: e -λ! ¹ ,: ■ ':'.? 'ur.u /..'^' / u-.-iic: -1 · = 11 .rv ',' '. Εε Π ir 3 t 'U ":". -!:. j'.rr · :. i.iurc'r; ei ie - ^ ■■: ■■■■; · ': -r. r- . · ■■ 'where you r he. ] Ow ^fi r? ';. T: it: i - :: pit _t ' ^£ -fPt.rt wire :. '<. [:. Jt ^^ -, v / elch ^ r however ': eir: e ^r ' C ^ ti;:.; i ^ sits, flies τι ^ ''^;; 1: p '· -p- :. Gl e Lehr ic'rt er ^: -:] ^; , CP'l: c :. .; 1 aers tj: .d RXIi, el »?:. TML II ' ¹ cer ocr.u tzschal tu; _: α λ; (iir Jpuie des hla rrr.rel π is,. 'zui : .p .--. t ive potential f'.ihrer.cori J_p! ter M ^M.

Through the through resistors RXL ^1, HX2 'and RX3' fliessenderi Jtrom transistor TIC2 ¹ biased so as ,? he gets into the conductive state. The current in the ^: - "oll e: gate E: nitter-Mreis of the transistor TRU2 ¹ flies through the coil of the relay S ', whereby the relay is excited and the normally open \ ontatite Sl' are closed.

By closing the Xonta ^ te 31 ', the relay 3' holds itself in that the coil of the relay 3 'is connected to an i. · -Ii; · ^ · . By closing the contact 31 ', the part 11' of the protective circuit which has the exit door contact 12 'is bridged. The Xreis extends

vorr conductor 27 via the ".contacts 31 ', the rectifier RSC"', and the resistor RZ12 to the connection point of the parts II 'and Tl "of the protective circuit. Thus, opening the output turnt ^ r.tn; - t ^ 17 ' ^{does not release the alarm relay AI., 1} ] 1 er ,.

The movement of the switch SW ¹ in the "Checks" -L are lets the capacitor CLl be discharged over the baffle elwiders ta na RY.k ¹ in the same way:!, As this in connection with Fig. 1 has been described.

When the bell 23 'rings, indicating that it is ready for operation, the control ^{switch SW' is moved to its "on" position, whereby the movable contact I 1} + 'of the switch SW2 ^f to the open contact 18' and the movable contact 2 ¹ + of the switch SW3 'is moved to the open Xontakt 26. The movable Xonta-ct 15' of the 'switch SW1' remains in contact with the Xontakt 17 '·

When the ondensator CDI 'discharges, the difference between its voltage and the power supply voltage appears as a bias voltage> π of the base of the transistor TRv Resistance RX. " ³ 'to overcome the reverse bias voltage caused, the transistor TRNl ¹ becomes conductive. The voltage across the resistor FXj' increases

appears as a result of the current flow through the circuit RXl ', RX? ¹ uriü RX? '. The time which is required for the charge on the capacitor CDI 'to decrease sufficiently for the. Transistor TEIIl 'are turned to leave depends on the _{Eritladunrszeit:} o ^ 3tsnte of CDI ¹ - RyA' from.

> / hen the transistor TEKl 'becomes conductive, its KoIIeK gate-emitter circuit bridges the? ■ -. s is-3trc mzu for the Trar.si stör TPK? ¹ , making the latter non-conductive. When the transistor TRi ;? ' becomes non-conductive, the relation 3 'drops, whereby its k rarbeitskor.ta; -: te 31' open. V. "er. Η die " .cv.- ta _: -: te Sl 'offer, are the capacitor CDI' via the Pa si s-emitter circuit? of the transistor TR .'1 'again tu free ade: .. By opening the Kor: ta te S]' the collector is only blocked by the transistor TKK. 1 ', which becomes non-conductive, and the star remains in its Ti "on" state.

The period of time during which the relay Ξ ^{1 is} excited, which depends on the discharge time constant of the "capacitor CEl", determines the 1 month during which the exit door contacts 12 'are ineffective for the transmission of an alarm. The next time, which is preferably 1 minute long, the house gives you enough time: /: Time to get away from it all through the exit door and to leave the door behind you 7.U slept. Ir: de.τ S 'hu tz schal tu nrsteii 11': anr. more sls

a group vet Au sgangsschu _tz-conta: te; i containing :, be who the owner a choice among several Ausganestüren h-.t..

VJLe in the case of FLg. 1 mu 2 ckr Fluent urn r just put the control switch in its "check" position and then, when the bell has rung ¹ HSt ₁ in its "AiV-Lag *?". The output delay is done automatically by a simple and reliable electronic switch; - created.

While the invention is with reference to particular embodiments of it and with reference to a particular application
has been described, various modifications of the invention are possible for those skilled in the art without departing from the concept of the invention and the scope of protection of the invention as evident from the appended claims.

Claims (1)

G chut 7. 3 η. s ρ odor: Switch for an electrical protective device - with three switching positions, namely one "arm" - three switching positions and two "on" switching positions for the states "check" or "on" the execution, characterized by the fact that the i'orital-rte of the switch are spatially arranged in such a way that the second ⁿ in "switch position can only be reached via the first" Fi :: "- Sr".