DE1001700C2 - Circuit for key locks for makeshift operation with switches and similar devices - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

PATENT 1 001

REGISTRATION DAY:

NOTICE
THE REGISTRATION
AND ISSUE OF
EDITORIAL:

ISSUE OF
PATENT LETTER:

DBP 1001700 KL, 20i 11/01

INTERNAT. KL. B 61 I NOVEMBER 16, 1954

JANUARY 31, 1957 JULY 4, 1957

agrees with the exposition

1 001 700 (L 20117 H 7 20 i)

The invention relates to a circuit arrangement for key locks on switches and similar devices, in the one of two key locks assigned to a point according to the point position is locked and monitored, according to patent 942 216. Such Einrichtuntgen are primarily Used for turnouts, which are normally operated remotely from the interlocking, using a power drive to be changed. '

According to the main patent, the closure and the monitoring of the key locks while maintaining the four-wire monitoring in that one or more blocking magnets in the monitoring circuit in series with buckets of monitoring relays and an auxiliary relay, between these, in Release circuit, however, only in series with buckets of auxiliary relays lie. The auxiliary relay is used in the event of a faulty release current to short-circuit the blocking magnet (s) directly or indirectly, whereby a contact of a switch-on or test relay is provided, with which at ■ proper initiation of the release the short-circuiting of the: blocking magnet made ineffective will. . .

The object of the additional invention is to operationally over- operate the mentioned functions of the auxiliary relay. check. According to the invention this is achieved in that contacts of a test relay are provided which switch on the release circuit. The arrangement is expediently made so that the locking. magnet in the release circuit is traversed by the current! in the opposite direction as in the monitoring circuit. The pick-up of the auxiliary relay is monitored operationally when the test relay the release can only be initiated or maintained if the auxiliary relay has picked up beforehand. '

According to a further feature of the invention, the correct monitoring of the locking state is thereby achieved achieved that a contact of the locking magnet in the locked state (locking magnet dropped) the Monitoring circuit closes and in the released state (locking magnet attracted) after correct reintroduction of the key interrupts the self-closing circuit of the auxiliary relay, thereby operationally it is checked that this contact opens properly in the release state, i.e. not is bridged. This is made possible by the fact that the locking magnet after 'the release even when removed The key has current flowing through it and is also delayed; its fall time is chosen to be greater than that of the relay whose self-circuit is interrupted by the contact of the locking magnet. The proper functioning of the break magnet is also checked by the fact that a contact of the Circuit for key locks for

Makeshift operation for switches and the like

Facilities

Addendum to patent 942 216

Patented for:

C. Lorenz Aktiengesellschaft, Stuttgart-Zuffenhausen

15 Heinrich Walter, Ludwigsburg (Württ.), has been named as the inventor

.Locking magnet the optical or acoustic release message turns on.

A possible embodiment of the invention is shown and described in the drawing. The monitoring current flows from plus via contact Tl, auxiliary relay A, resistor Wi, contact R2, line 1, contact .S—, blocking magnet Sp, line 2, contact P 2, monitoring relay Ü, contact R1, line 3, contact S +, contact Sp, line 4, contact Pl to 0. Only the monitoring relay Ü responds, but not the auxiliary relay A, which receives a current that is too low due to the series connection with Ü. When the release is initiated, contact T1 initially interrupts this monitoring. circle; as a result, the monitoring relay Ü drops out, and the contacts R1 and R2 are switched over by switching means (not shown). After contact T1 closes again, auxiliary relay A responds via plus, contact Tl, auxiliary relay A, resistor Wi, contact R2, line 3, contact 6 "+, contact Sp, line 4, Kontakt.Pl and 0. After the auxiliary relay has picked up A switch contacts Pl and P 2 of a connection or test relay using switching means (not shown). As a result, the release circuit is established via plus, contact Tl, auxiliary relay A, contact P 2, line 2, blocking magnet Sp, contact S: - ;, Line 1, contact R1, contact Pl, 0. In parallel to the blocking magnet, after the blocking magnet Sp has responded, the circuit for the acoustic release message from auxiliary relay A via resistor Wi, contact A, line 4, contact Sp, buzzer Su, contact J? - .

709 573/186

The contact Pl has canceled the short-circuiting effect of the contact A after it has responded with its rest side. When the key for the .Pluslage is removed, the contact 6 "+ switches over and closes the buzzer Λ via the circuit: Branch between relay A and resistor Wi, resistor Wi, contact R2, line 3, contact 5+, branch between contact S + and blocking magnet Sp, short. The circuits for blocking magnet Sp and auxiliary relay A remain, but a different current distribution occurs because resistor Wi is now parallel to blocking magnet Sp . When the key for the negative position is inserted, contact S switches · - to and interrupts the circuit for the blocking magnet Sp and the auxiliary relay A including the current branch the blocking magnet Sp drops due to its copper delay after the auxiliary relay A This fall delay of the blocking magnet is necessary so that the auxiliary relay A germinate Selbstschluißkreis on the rest side of the contact.. Sp forms, namely from plus via contact Tl, auxiliary relay A, resistance Wi, contact ^, line4, contact5 "/» (Quiescent side), contact ^ -, line 1, contact R 1, contact P 1, 0. If contact Sp remains closed (quiescent side) or is bridged, this self-closing circuit is created and the error is displayed. Normally, however, the auxiliary relay A drops out before the blocking magnet Sp . After the auxiliary relay A has dropped out, the contacts Pl and P 2 switch back to their basic position so that the monitoring circuit is restored and indicates that the minus key is closed.

Contact A short-circuits the release voltage if the release current is incorrect (e.g. due to iMull potential at terminal 2). For operational testing of this contact, it must assume at least one switching function if it is properly released; In the selected embodiment, this is the acoustic release message. If contact A does not work properly, the acoustic message will not be heard the next time it is released and the error will be noticed.

The invention is not limited to what has been described Circuit example. There are other similar circuit designs depending on the required conditions possible.

Claims (9)

Patent claims: 1. Circuit for key locks for makeshift operation with turnouts .and similar devices, in which one of two keys assigned to a turnout is locked and monitored according to the turnout position and one or more locking magnets «in. Monitoring circuit in series between a monitoring relay and an auxiliary relay, namely between these, in the release circuit, however, are only in series with an auxiliary relay, according to patent 942 216 (application L 18033II / 2Oi) characterized in that contacts (Pl, P 2) of a test relay are provided, which switch on the release current circuit. ' 2. A circuit according to claim 1, characterized in that the blocking magnet (Sp) in the release circuit is traversed by the current in the opposite direction as in the monitoring current circuit. 3. A circuit according to claim 1, characterized in that the contacts (Pl, P 2) of the test relay initiate or maintain the release only if the auxiliary relay (A) has previously attracted. 4. A circuit according to claim 1 and 3, characterized in that a contact (A) of the auxiliary relay in the case of a faulty release circuit short-circuits the Fr Eigabe voltage and the same contact takes over at least one switching function when the release is properly initiated. 5. A circuit according to claim 1 and 4, characterized in that an optical or acoustic release message is switched via the contact (A) of the auxiliary relay when properly released. 6. A circuit according to claim 1, characterized in that a contact of the blocking magnet (idle side of contact Sp) closes the monitoring circuit in the blocked state (blocking magnet dropped out) and, in the released state (blocking magnet attracted), the self-closing circuit of the auxiliary relay after the key has been correctly reinserted (A) interrupts. 7. Circuit according to claim 1 and 6, characterized in that the locking magnet according to the Release even when the key is removed is. 8. A circuit according to claim 1, 6 and 7, characterized in that the locking magnet is abfalilverzögert and its fall time is greater than that of that relay (A) whose self-closing circuit through the rest side of the contact. (Sp) is interrupted. 9. A circuit according to claim 1, characterized in that a contact of the locking magnet (working side of the contact Sp) turns on the optical or acoustic release message. 1 sheet of drawings © 509 7S8 / 9 1.57 709 573/186 6.