DE1243894B - Relay chain for an automatic, programmed weighing device - Google Patents

Description

GERMAN

PATENT OFFICE

EDITORIAL

German class: 42f - 31/03

Number: 1243 894

File number: S74814IXc / 42f

Filing date: July 14, 1961

Opened on: July 6, 1967

The invention relates to a relay chain with a relay associated with each relay, the relay according to its Charge-actuating capacitor to switch from one component to the next an automatic, programmed weighing priority by means of all relays (component relays) the chain associated pulse relay, which via actuated contacts the capacitor of the to switching relay applies voltage.

With the weighing devices known up to now, the switching from one component to the next is made with the help of a rotary selector known per se or some other stepping mechanism. A relay is connected to each selector contact, which controls the further operations. Since, on the one hand, the number of individual components can be very different and, on the other hand, the Voters are only constructed with certain switching steps, the voters are in the in most cases not fully exploited. Conversely, an expansion of the system is only possible by replacing it of the voter against one with a higher number of contacts.

There is now a circuit arrangement for counting pulses with a chain relay for telecommunications systems known, in which a capacitor is provided for switching on the chain, which over Contacts of a pulse relay assigned to the chain is charged and then each new via the Relay to be switched on discharges, which in turn brings the next relay ready to respond.

The object of the invention is to create a particularly simple and reliable relay chain for weighing devices. This task is achieved in that, according to the invention, a contact closed by the preceding component relay is arranged in the charging circuit of each capacitor and that, after switching to the next component, the charged capacitor is switched over via the. th contacts of the pulse relay and via a normally closed contact controlled by the relay downstream of the respective relay and the assigned relay. This results in an excellent utilization of the existing components, since the relay chain can be matched to the respective system. Another advantage arises from the fact that considerable powers can be switched directly with the relay chains, while additional links have to be connected with a rotary selector. Another great advantage of the invention is due to the large relay chain in an automatic,
programmed weighing device

Applicant:

Siemens Aktiengesellschaft, "

Berlin and Munich,

Erlangen, Werner-von-Siemens-Str. 50

Named as inventor:

Dipl.-Ing. Heinrich Seligmann, Erlangen;

Dipl.-Ing. Walther Kirchner f, Berlin-Kladow

Reliability of the chain is given, d. H. the relay chain cannot run automatically after the first impulses. That security comes with a simple one known relay chain cannot be reached. The relay chain is expediently designed in such a way that that with the arrangement of two capacitors assigned to the pulse relay the first after Switching on the first component relay by means of a contact actuated by this via a Changeover contact of the pulse relay and, the second • Capacitor when the pulse relay responds and Switching to the next component by one of the second component relay actuated Contact and can be connected to voltage via a second changeover contact of the pulse relay. To this Way there is a considerable saving in components for the relay chain. IJm incorrect switching To avoid in any case, the relay chain is expediently designed in such a way that when it falls off of each component relay this via a contact to the assigned capacitor in a known way connects a discharge resistor in parallel. '·

The invention is explained in more detail with reference to the drawings using two exemplary embodiments.

In Fig. 1, the relays assigned to the individual components are designated by I to IV, through which the component jump is triggered. For this purpose, a voltage towards zero can be taken from terminals KI to KW when the corresponding relay I to TV has picked up. Each of these relays I to IV is assigned a capacitor C1 to C4, which has one of the contacts z1 to i4 common to all relays I to IV

709 609/101

3 4

Pulse relay / can be connected to voltage. At the end of the be, it must be a relay E via a self-retaining contact el in the relay chain, which is self-retaining (indicated by dashed lines). In the changeover contact in the sense of the pulse relay / and a conse- quence case, the capacitor C 5 shown in dashed lines is also assigned. The pulse relay / rectifier GIr 5 required. The rectifier works as a result of a parallel-connected i? C circuit S GZrI to GIrS prevent the one R, C from being delayed so that even when the self-holding contacts are briefly switched, the capacitors when the contact w actuates a constant recharge of the corresponding relays.
Pulse duration is secured. The contact w is then because a switchover is actuated for each component relay, if from one component to the next contact is required on the command relay, it must be switched over. io sem with a larger number of components The mode of operation according to FIG. 1 shows how several command relays are connected in parallel, as follows: The capacitor Cl is limited by the idle con- the number of contacts on a relay is limited.
clocks II to IVl of the component relays I to IV In Fig. 2, a further embodiment and the contact el of the relay E is charged. The illustrated, which requires considerably less effort, capacitors C 2 to C 5 are, since the working 15 and has the advantage that any contacts 15 to IV 5 are open in this way, not charged. long relay chains are produced, without being the contact w is operated, the pulse obtained is required to operate multiple relays in parallel. It relays J voltage and sets its changeover contacts, the required number of contacts on the il to / 5 is also significantly reduced from the left switch position according to the component relay; so who-fig. 1 to the right. In this case, the only one changeover contact and two working capacitors C1 are discharged via rectifier Girl, normally closed contacts per relay are required. With / 'this is through contact Π 4 and the coil of the relay I. The relay I capacitor C and resistor R' responds with a drop-out delay and holds itself via self-holding contact 12 called pulse relay, which is self-reliant with the help of a contact. At the same time, the normally closed contact II opened w 'can be connected to voltage.
net so that the fall of the relay / condensation of the 25 "By the start command to the push button A" tor Cl can not be loaded. At the same time, the first component relay Γ via the Kon At the same time, the working contacts 13 and 15 clocks ΠΙ ', ΠΕΙ' and IVl 'are connected to voltage. Chosen closed, whereby on the one hand the capacitor rend the further course of the work process Cl is completely discharged via the resistor Rl the push button "On" is blocked. The start is therefore and, on the other hand, the charging circuit of the 30 only possible from the zero position. When the capacitor Cl is prepared so that it pulls the relay Γ, the switchover contact II 'is switched over after the relay has dropped out / via the switchover, which means that the self-holding circuit contact il can be charged once. After the relay Γ is closed and on the other hand the delay time runs, the relay / drops and the capacitor C 2 is charged via the rectifier GIr Γ and resistor RV. If the 35 and changeover contact ζ 1 'of the pulse relay J', the contact w, is closed a second time, the capacitor Cl 'is energized. Next pulse relay / on again and switches its switchover to the other switch position by closing the normally open contact 13 'of the contacts z'l to ζ5. Inrush circuit of relay Π 'prepared. It responds to relay II because the capacitor C2 was charged rectifier Girl ' to GIrA' and GIrS ' to GIrW and the component relays Γ to IV' and the coil block via the rectifier GIr 2, the 40 of relay II.

load Tratm. When the relay II is picked up, the relay I is rejected by opening the normally closed contact II4 to switch to the next component, the contact v / is actuated. As a result, the fen speaks, whereby the charging circuit of the capacitor relay J ' and switches its contacts iV and il' . C2 opened by opening the normally open contact 15 '45 This discharges the capacitor Cl' via Konwird. As before, when the relay II is pulled in, clock il ', rectifier GIrS', contact 13 'and coil, the normally open contact II3 is closed, so that after that of the relay II'. This is done by changing the tightening of the relay Π the capacitor is self-holding via switching contact IIΓ. At the same time the contacts il and Π3 and the resistor Rl , the relay Γ drops. Finally, through a fully discharged can. The relay II keeps 50 normally open contact II2 'to the capacitor Cl' in opposition to the contact Π 2 in the sequence itself. Furthermore, i? 3 'was connected in parallel, so that the capacitor, the contact Π5 is closed, which completely discharges the charging gate Cl' will. Since the contact circuit of the capacitor C 3 is prepared. When the 13 'has opened, the capacitor can no longer drop out of the relay / is immediately charged via the switch. Through the further normally open contact contact / 3 of the charging circuit of the capacitor 55 113 ', the switch-on circuit of the next relay C 3 is still closed, so that preparations have been made accordingly at III'. However, since the capacitor further actuation of contact w on the import C 2 'was not loaded, speaks during the closing of the pulse relay / relay components ΙΠ and IV with contact 113' relay ΙΙΓ not. After opening the contacts IV4, III2 and IV2 with the help of the relay contact w ' and the end of the drop, the associated discharge resistors 60 delay time of relay /' also go to the R3, R 4 of the corresponding contacts III3 switching contacts iV and il ' in Rest position. First and TV3 are switched on. So that the relay chain is now the capacitor C2 'is returned to the initial position via resistance, Rl', rectifier GIr 1 ' and switching contacts Π1' is the relay E, to which the contacts IV 5 and e3 are charged to IVl ', during the Capacitor Cl 'are arranged, which remains uncharged with a pulse only 65. If the contact w ' picks up again briefly and is activated by opening its rest, the relay V responds, via whose contact e4 the last relay IV in the chain drops. Contact il ' then the capacitor C 2' to the Re-Should a self-holding of the relay E desired laisspule of the relay III 'is switched on. This

Relay is latched via contact ΠΙΓ. At the same time, the relay Π 'is brought to fall and the charging of the capacitor Cl' is prepared. Finally, the capacitor C 2 'is completely discharged through the normally open contact III2' via a resistor A4 '. Finally, the circuit of relay IV is prepared by closing contact III3 '. After the relay / 'has dropped out, the capacitor Cl' is charged again. Correspondingly, the next time contact w 'is activated, component relay IV with associated contacts TV2' and rV3 'and then relay E' respond. The relay E ' does not go into self-holding mode, but deletes relay IV through contact el' and discharges capacitor C2 'via contact el'. After the relay E 'has dropped out, the rest position of the relay chain is reached again.

At the terminals KY to KTV ' a voltage towards zero can be picked up if the corresponding relay Γ to IV has picked up. ao A new start is only possible if the »On« button is pressed again.

The rectifiers GIr 5 ' to GIr 8' prevent recharging of the capacitors Cl 'to C 2', while the rectifiers GIr 9 ', GIr 10', GIr 11 'ensure that the capacitors Cl' and C 2 'only Have to supply current for the relays ΙΓ to E ' and not discharge themselves via the consumers connected to the terminals KW to KIY'.

Claims (3)

Patent claims: 1. Relay chain with a capacitor that is assigned to each relay and activates the relay after it has been charged to switch from one component to the next in an automatic, programmed weighing device by means of an impulse relay assigned to all relays (component relays) of the chain, which controls the capacitor via contacts operated by it of the relay to be switched applies voltage, characterized in that a contact (15, II5, III5) closed by the preceding component relay (I to ΠΙ) is arranged in the charging circuit of each capacitor (C 2 to C 4) and that after Switching to the next component of the charged capacitor is via the switched contacts (H, il, ζ3, / 4) of the pulse relay (7) and via a break contact (Π4, ΠΙ4, IV 4) controlled by the relay downstream of the respective relay and that assigned relay discharges. 2. Relay chain according to claim 1, characterized in that in the arrangement of two, .dem pulse relay (/ ') associated capacitors (Cl', C2 ') the first (Cl') after switching on the first component relay (T) by means of one of this actuated contact (I Γ) via a changeover contact ( if) of the pulse relay and the second capacitor (C 2 ') when the pulse relay (/') responds and switching to the next component via a contact operated by the second component relay (2) ( IIΓ) and a second changeover contact (H ') of the pulse relay can be connected to voltage. 3. Relay chain according to claim 1, characterized in that when each component relay drops out, it connects a discharge resistor (Ri to R4) in parallel to the associated capacitor via a contact (13, 113, ΙΠ 3, rV3) in a manner known per se. Considered publications:
German exposition No. 1001722,
811; British Patent No. 846,715;
"Electronics", Vol. 7, 1958, pp. 173 and 174;
"Siemens-Zeitschrift", Vol. 34, 1960, p. 462. 1 sheet of drawings 709 609/101 e. 67 © Bundesdruckerei Berlin