DE491277C - Circuit arrangement for alarm systems, especially for fire alarm systems - Google Patents

Description

Circuit arrangement for alarm systems, in particular for fire alarm systems There are alarm systems, for example for fire alarm purposes, known in which with Help from drive contact disks triggered during reporting sent signaling current surges and where several detectors are connected in series to form loops, for which for the purpose of receiving several messages issued simultaneously in a loop two or more recipients are required. Such plants «-earth with larger ones Expansion very complicated and easily prone to malfunctions.

There are also systems known in which during the course of the Contact drive of a detector, a second detector in the same loop is not in operation can occur, as a special unlocking magnet as a result of the impulse power interruptions caused by the detector, the run is recognized in second place used detector does not release. Such and similar systems require extremely complicated and precise mechanical structure, so that the initial cost become very high for the individual reporting offices.

The present invention also relates to alarm systems in which in There are several reporting points in a reporting loop, and where there are several reporting loops proceed from the office. According to the present invention, however, it is possible in the simplest possible way Report all reporting points to all loops. Use of a reporting office to block so that only one message recipient is required at the office. this will achieved through the use of differently directed currents in the message loops during the individual processes and through the use of polarized blocking magnets in the registration offices themselves.

In the drawings, the invention is based on an exemplary embodiment shown.

Several loops I, II ... are connected to a common receiving device. In each loop there are several reporting points M. The delivery of a message = happens in a known manner in that a drive driven by spring force is put into action. A pulse disk ISch provided on its circumference with millings e acts on a pulse contact i in such a way that it interrupts and closes a circuit established via it, depending on the arrangement of the millings e. Two cam disks NI and N2 are on a common shaft with the pulse disk. NI actuates a spring set n ', 11% 2 a spring set n2. Each detector also has a polarized blocking magnet SPM, which can be operated to prevent the detector from draining, two connection terminals nzl and 1n2 for the loop lines and an earth terminal E.

During the process of the detector, the following phases o to 7 are to be distinguished: which are caused by the different positions of ISch, NI and N2.

o. rest position: blocking magnet SpM short-circuited, Clamps ini and @ ra @ connected directly via n- and i.

i. Procedure: Cam discNl opens the two contacts of n1, ml and m2 are now connected via SpM and i .

2. N2 closes the contact of n2. This will make the Impulisfeider s connected to E.

3. NI closes the spring set n 'again, whereby SpM short-circuited again will; i remains connected to E via n2.

4 .. The circuit running through i is interrupted when i jumps into the icing e.

5. i comes back to the periphery of the disk ISch., The circuit across i is closed again.

6. Alternating opening and closing of the contacts of i according to the milled rings e of ISch. (Impulse).

7. N2 opens contact n2 again and thus the rest position restored according to phase o.

The individual detector loops I, II ... are each assigned a loop battery Bl, B11 ... and the following relays in the main unit: one blocking relay Sp each, two loop relays S1 and S2 each, one wire break relay D each, two holding relays El and E2 each , two wire break lock relays F1 and F2, one resistor W1 each, two resistors each, one wire break switch DS each.

In addition, the main unit has the following common for all loops: an office battery B, two receiving relays Cl and C2, which on both sides of the Office battery B are assigned, a connection relay .4, a holding relay H, a delay relay h1, a delay relay T'2, a receiver X.

When the system is idle, current flows through each detector loop I, 11 ..., for example in loop I: - pole of battery B! Relay S ', contacts s', f2, spl, S chleif GB INTRODUCTION si, Klemmeng 'of the first detector M, contacts of n1, terminal 1112 spe accordingly by the other detectors M, Leitring s1, contacts, s f, s', Relay S2, + -Pol of the battery Bl, so that all relays S 'and SZ are energized and their contacts are in the working position, as shown. Furthermore, current flows through a local loop in the main station, hereinafter referred to as the main loop: - [- Pole of battery B, relay Cl, contacts d2, s4, s °, dl 'of loop I, d14, s16, s20, of the loop II, correspondingly through the other loops, which are connected to terminals K = and I (1, relay C2, - pole of battery B.

The relays Cl and C2 are therefore energized and their contacts cl and c2 open.

Let us first consider the case that all loops are idle and in a loop, for example in loop I, a detector is actuated. This is brought to expiry in a manner known per se. In phases o to 3 initially nothing happens in the head office. The outer loop I lies over the Relays S 'and SZ on the loop battery Bl. In phase 4 of the detector, however the pulse contact i is opened. So the loop is broken, and the Loop relays S1 and SZ are de-excited. This will be the one going through the main loop Quiescent current passed through the detector loop I by closing the contacts' and s8. At the same time, the middle of the battery B is connected to earth via contacts', which however is temporarily irrelevant. Main battery B power goes through this loop I in the opposite sense than the current from the loop battery Bi. So while when the system was idle, the negative pole of Bi was on the left loop branch and the The positive pole of BI on the right branch of the Schlenfen now occurs when it is connected to the main battery B its positive pole to the left and its negative pole to the right loop branch. Circuit: --- Pole of battery B, relay Cl, contacts d2, s6, outer loop I, s8, main loop, Contacts d11, d14, s16, s20, d23, terminals KZ and KI, relay C2, - pole of the battery B.

The reversal of the current in the main loop has the consequence that if now another detector 111 is actuated in the same loop, in its phase i, in which the short circuit of the polarized blocking magnets is canceled, this one pulls its anchor, which blocks the flow of the engine. In a similar way the detectors are blocked in the non-actuated loop II, in which the blocking relay Sp is energized simultaneously in the following way: --- battery pole B, contacts dl, s2, blocking line SpL, contact s14 of S 'of loop II, relay Sp, --Pol of the battery B.

Sp closes the contacts spl and spl1, so that also in the loop II the positive potential of the main battery B is placed on the left side of the loop and a possibly activated detector M as well as in loop I is prevented from running. Further connected loops would be blocked in a corresponding manner.

While the contacts sp 'and spie are opened, becomes simultaneously about the Contacts sp "and spl ° an auxiliary circuit closed, which causes the relays S1 and SZ to have their armature in the non-actuated loops do not let go, for example in loop 1I: --Pol of battery BII, relay S ', Contacts s17, f3, »°, resistance W1, contacts spl °, f, s13, relay S2, --- pole of Battery BIi.

During the interruptions of the current at i, the relays Cl and C = are de-energized, so that they close the contacts cl and c2. The starting relay A receives power: --- pole of battery B, contacts dl, s2, relay .l, - pole of battery B and, via a contact a1, actuates receiver X, whose mode of operation is not of particular interest here. If the pulse contact is closed again in phase 5 of the detector, relays Cl and C = pull their armature again, and the circuit for A is interrupted again. In phase 6 the current at i. interrupted according to the milled rings e of ISch, and relay A causes the actuation of X according to the interruptions caused by the milled cuts e. The millings in the pulse disk ISch are arranged differently for each individual detector, so that the current surges caused when the detector expires on the recordings of the receiving apparatus X can immediately recognize the activated detector. Via contact a =, relay A simultaneously switches on a holding relay H , which via its contact h.2 supplies current to the pull-in delay relay T'1: - pole of battery B, relay V1, contacts 1a2, a4, + - pole of battery B.

As soon as the detector has entered phase 7, i.e. further interruptions the main loop no longer takes place, and thus the relay C, the contacts cl and Keep c2 open, T'1 attracts its armature v1, creating an auxiliary circuit for Re-excitation of relays S1 and S2 of loop I is formed: --Pole of the battery Bi, relay S1, contact v1, relay S2, --- pole of battery BI.

S1 and S = tighten their anchors again. With your contacts s4 and s ° the main loop is closed again and the original circuit for the Main battery B quiescent current restored; with sr, and sft the detector loop becomes I separated from the main loop and put back on BI at s "and s7.

Should another detector be in Activity can be set, but through the blocking described above, namely through the reversal of the quiescent current direction in the loop can be prevented from draining, so this is now due to the fact that the original direction of current in the individual Loops is restored, unlocked and the message can now be issued.

If a wire break occurs in a loop, for example at point DB of the right branch of loop I, the closed circuit of battery BI is interrupted. S1 and S2 let go of their anchors, whereby, as already mentioned, the center of the main battery B is connected to earth via contact s 1. Since the local loop leading via B is also interrupted at the same time at contacts s4 and s2, C'1 and C = are also de-excited. This switches on relay: 1. The receiver k now receives power from the main battery B via contact a1 and moves its switching arm x one step further to x1. Since: 1 remains switched on longer than with normal power interruptions during a detector sequence, the delay relay I'2 switched on via contact a3 now becomes effective and energizes the wire break relay D + -Pol of battery B, contact v6, switching arm via contact T'° x, contact s11, wire break switch DS, relay D, - pole of battery B.

The relay D holds itself through its contact d '. The wire break switch PS enables the holding circuit for relay D to be interrupted in order to restore the idle state after the wire break has been eliminated.

Contact dl = closes an auxiliary circuit for the at s4 and, s ° interrupted main loop: + -pole of battery B, relay Cl, contacts e1, d12, e14, d14, s "'1,, s2 °,. d23, correspondingly via the others connected to K2 and K1 Loops, relay C2, --Pol of battery B, so that the contacts cl and c2 open will.

If, for example, a detector is triggered in the left branch of loop I and the loop line is connected to earth in phase 2, the wire break holder relay El, which has a * delayed drop, is switched on: --Pole of battery B, relay El, contacts e3, d3, s', f2, spl, Schleifenleitangsl, terminal Ital of the activated detector, whose first contact n2, terminal E, earth, contact s1, middle of battery B.

E 'maintains itself via its contact e7, contacts = closes an auxiliary circuit for relay C2: --Pol of battery B, relay C2, contacts d23 S20 S15' d14 e14 d12 e2 middle of battery B] contacts- 'closes an auxiliary circuit for Cl : --Pole of battery B, relay Cl, contacts e4, d3, s5, f2, spl, loop line s1, contacts i and n2 as well as terminal E of the activated detector, earth, contact s', middle of battery B, so Cl and C2 stay excited. The message can now be recorded as the detector continues. The impulses are now transmitted via the middle of battery B, so that only relay Cl is activated.

The other detectors are blocked in a similar way as described above. On the left branch of the broken loop I, the positive potential of the office battery B is placed via contacts from relay Ei; Contact switches on the wire breakage blocking relay F2, which blocks the remaining detectors in the broken loop I during the course of the first detector in the event of a possible triggering of loop I: + -pole of battery B, contacts ee, d6, d8, e1 °, relay F2, - pole of battery B.

Relay F2 connects the negative pole of the loop battery via its contact f4 BI to the right branch of the broken loop, so that this is also the direction is reversed for any reverse current required. Via contact it will be at the same time the blocking relays Sp of the other non-actuated loops via the blocking line SpL energized, for example Sp of loop II: + -pole of battery B, contacts es, d5, Blocking line SpL, contact s ", relay Sp, --Pol of battery B, so that during the If a message is issued in the broken loop, the detectors in the other loops also be blocked.

Claims (7)

PATENT CLAIMS: i. Circuit arrangement for alarm systems, in particular for fire alarm systems, in which the signal current surges with the help in the usual way of drive contact disks triggered upon reporting, and where several reporting points located in one or more loop lines, one common message receivers are assigned, characterized in that when used of a detector, the sequence of all other reporting points when actuated by reversing the current direction of the detector loop quiescent current up to the final registration the message of the activated detector is blocked. 2. Circuit arrangement according to claim i, characterized in that by interrupting the loop when initiating the Message by actuating relays in the loop (Si and S2) the loop separated from the loop battery (BI) and connected to an office battery (B) with the reverse Sign is placed. 3. Circuit arrangement according to claim i and a, characterized in that that a polarized magnet (SpM) in the reporting point (11l) that, through the current the loop battery (BI) is actuated, the detector is unlocked by the reverse Current of the official battery (B) is caused to block the drain of the engine and during the impulse from the reporting point itself by one of a cam (N1-) of the engine-controlled switch is short-circuited. q .. Circuit arrangement according to Claims i to 3, characterized in that by interrupting a loop I when a message is initiated, the potential of an office battery (B) is applied to a blocking line (SpL) common to all loops and thereby in every other loop II, III .. . the direction of the current is reversed by means of the relay (Sp). 5. Circuit arrangement according to claim i to q., Characterized in that when the lock is initiated in the loops to be locked, the loop relay drops out (Sl and SZ) and thereby the interruption of the exchange circuit through the formation an artificial local loop is prevented. 6. Circuit arrangement according to Claims i to 5, characterized by such an arrangement of the control members (N 'and N2) of the pulse generator of the reporting office, that initially when the detector is actuated the blocking magnet (coil) is placed in the loop to test, then short-circuiting of the blocking magnet for a short time the loop is interrupted to the blocking in the other detectors and loops and finally the loop closed again while maintaining the short circuit of the blocking magnet and in is known to open in the rhythm of the impulses. 7. Circuit arrangement according to Claims i to 6, characterized in that before the first loop interruption The loop is connected to earth by the activated detector when the message is initiated and when the loop is interrupted, the relays controlled by these (S1- and S =) ground the center of the office battery (B), so that the impulses that are now taking place via the two parallel-connected loop branches and earth. B. Circuit arrangement according to claim i to 7, characterized in that with a longer than with the introduction the message usual interruption of a loop, e.g. B. in the event of a wire break, a relay (D) is energized, which is caused by the interruption Blocking of the remaining loops by removing the potential from the blocking line (SpL) cancels, so that the office loop, which occurs as a result of the dropout of the loop relay (S1 and S2) was interrupted, it is restored in order for the remaining loops to save any messages, and that at the same time in the two branches of the Official loop switched off broken loop each with the corresponding poles the office battery connected relay (Cl or C2) is energized, which when actuated .a detector lying in the broken loop above ground and half the official battery appeals to. G. Circuit arrangement according to Claims t to 8, characterized in that that by pressing the lying on the reporting branch of the broken loop Relay (E) the other branch and all other loops are blocked. ok Circuit arrangement according to Claims i to g, characterized in that after termination the registration by creating an artificial loop the loop relay (S1 and S2) are brought to the attraction and thereby, the previously operated loop is restored. i i. Circuit arrangement according to Claims i to io, characterized marked that in the event of a wire break after the registration of the message has been completed on the broken loop by removing a holding current that is the case with the - message Relays activated in the broken loop (C or C2) to the relevant one again Loop branch is placed.