DE1195867B - Self-holding, pulse-controlled thermowell contact relay and use of the same in a coordinate control matrix - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. α .:

HOIh

German KL: 21g -4/01

Number: 1195 867

File number: W 32209 VIII c / 21 g

Filing date: May 5, 1962

Opening day: July 1, 1965

The invention relates to a latching, pulse-controlled protective tube contact relay.

In general, for switching relays, the z. B. are intended for electronic switching systems, required that they respond to pulses of very short duration that occur with a small time interval. It is known that the use of switching relays with these properties in telephone systems an improvement in telephone service as well as savings in construction and operation enables. Relays that respond to short excitation pulses are in the French patents 1,263,486, 1,266,687 and 1,270,860. It this is the type of relay mentioned at the beginning. Such relays are remanent magnetic Control parts are used with the aim of generating the magnetic field that the contacts operated by a reed switch. The control part is due to a substantial magnetic aftereffect (Remanence) so that it is after the cessation of a short, applied to a control coil Impulse remains in one of its stable magnetization states. Obviously the successful one Operate such devices in a critical manner from the manufacture of the required remanent magnetization states due to the excitation pulse. More numerous as a result of the smallness Such relays it often happens that the magnetic field of the control coil, which one surrounding remanent part is so strong that it affects the magnetic state of another remanent part even if it is strongly pre-magnetized by a permanent magnet. The stray field can in some cases be sufficient to produce a reversal of the desired relay effect.

Relays have been built using remanent magnetic control parts and which have an unlimited positive effect of the switching contacts both during actuation and during Show release. With a positive effect, the activation or release of the relay contacts is below the Influence of the electrically controllable field of the remanent magnetic parts meant and not the mechanical Effect through the spring tension of one or both contacts. With unlimited actuation or release means the independence of the relay effect from the size of the control pulses, provided that the energy of these pulses exceeds a certain minimum value. Such a relay with unlimited positive effect is in the aforementioned French patent specification 1270 860 described. It essentially consists of two self-holding, pulse-controlled protective tube contact relays and using it in a coordinate control matrix

Applicant:

Western Electric Company, Incorporated,

New York, N.Y. (V. St. A.)

Representative:

Dipl.-Ing. H. Fecht, patent attorney,

Wiesbaden, Hohenlohestr. 21

Named as inventor:

Robert Lee Peek Jr., New York, N.Y. (V. St. A.)

Claimed priority:

V. St. v. America May 15, 1961 (110 081) - -

remanent magnetic control parts and two control windings, which are assigned to the control parts.

Another known relay of the type described in the opening paragraph is with a pair of contact tongues also provided with two control coils connected in series, essentially the same but opposite Generate magnetic fields and each surround one of the contact tongues. The two control coils of the known relay are intended to serve as a dropping winding. To operate the known Relay, the contacts of which are to be part of a step-by-step selector, a permanent magnet is used, which is gradually moved past such contacts and for each Step actuates the contacts assigned to this step. Throwing is essential faster instead of that the discarding winding together with the advancing device of the voter is energized.

Devices of the types described above are inherently non-polarized; h., the Switching action is not dependent on the polarity of a single control pulse, but on the relative one The polarity of the pulses supplied to both windings is dependent. In many switching networks it is however, it is desirable to have polarized relays available.

Accordingly, it is the object of the invention to provide a relay of the type in question which

509 598/289

3 4

is polarized. According to the invention, this task is parallel path for positive currents. Accordingly, flow

in the case of a latching, pulse-controlled protective circuit, negative currents applied to the control circuit

Tubular contact relay with a pair of remanent magneti- both windings 16 and 17, while positive

shear control members, the z. B. as contact tongues from currents can only flow through the winding 16,

are formed, and two control coils, which are in series 5 because the winding 17 'is bridged.

are connected and essentially the same, but the control windings 16 and 17 are

generate opposing magnetic fields, each directing that they are opposing magnetic fields

Control member is surrounded by a control coil, so produce essentially the same size. if

solved by that, depending on a tax, it is also not necessary that the strength of the two

If the excitation current of a first polarity is exactly the same as the fields, then there is one

one of the coils and for depending on a limit for the difference between the fields

Control current of a second polarity taking place can be present. The limit for the difference

If both coils excite an asymmetrically conductive which is permissible in the present case, the main

Device is provided. mainly due to the geometric shape of the relay

In this way, a polar 15 is determined in the simplest way. That is, the difference must be less than ized operation of the relay achieved: The contact- the size of the field of each coil, which is straight Tongues can be activated by a short current sufficient to maintain the magnetic state of the free pulse of that polarity are closed at the end of the tongue surrounded in front of the other coil to switch the current via one of the control windings. Assuming that the and, for example, via a zero point through the unilaterally conductive resistance of the diode 18 in the direction of flow Device formed bypass path that carries while the resistance in the reverse direction unother Control winding leads. The contact reeds is finite, the number of turns of the coil is 16 am are due to a current pulse of the other PoIa- most advantageous equal to the number of turns of the coil rity, which in the example assumed should be 17. If necessary, the deviation of the both control windings flows, so that opposite diode from this ideal state through a suitable one set magnetic fields of about the same strength to compensate for the difference in the turns of each coil be procreated. will. The location of the

The relay of the invention is particularly suitable for coils 16 and 17 axially of the tongues 12 and 13

for a coordinate switching matrix, in which a posi-

tively unlimited actuation and release of each cross- 30 the contact parts coincide with the area,

point regardless of the state of the other cross in which the opposing magnetic fields

points can be obtained. annihilate each other. So if both coils

In the following, the invention is excited by means of the drawing so that the control parts are magnetized

tion: are, the same magnetic poles are created

F i g. 1 of the drawings shows a special arrangement of the same thickness at the free ends of the tongues,

conduct of the invention; If the execution of the F i g. 1 a tax

Fig. 2 shows a changeover relay to which the invented current pulse is applied with negative polarity,

embodied the principle of education; arise through the windings 16 and 17 in the axial direction

3 shows schematically a switching matrix, opposite magnetic fields in the opposite direction. That

speaking of the invention principle. 4 ° axial magnetic field in the coil 16 magnetized

In Fig. 1, a reed switch is shown which the tongue 12 such that the free end of a

shows a bulb 1β made of glass, in whose demagnetic north pole is. In the same way will

Opposite ends the connections 11 fused in the free end of the tongue 13 by the axial field

zen are. The tongues 12 and 13, which in the case of the winding 17 are magnetized so that their free end

Embodiment in addition to its effect as a switching 45 is also a magnetic north pole. As a result of

Contacts also work as control parts, consist of the magnetic aftereffect of the tongues 12 and 13

a material that remains stable through a multitude of each tongue in a stable remanent

retentive magnetization states - magnetization state after the current is

net is; they are attached to the terminals 11 so has heard. Because their overlapping free ends

that their free ends have the same magnetic polarity in the center of the piston 50, they push

10 overlap. The tongues 12 and 13 are separated from each other, so that the switching contacts the open

surrounded by control windings 16 and 17, respectively. Assume a state.

soft magnetic bridging part 19, which in When a control current pulse with positive polar-

Schematic form is shown, is located on the fact at the in F i g. 1 is applied

Piston 10 in the area where the free 55 is created by an axial magnetic field

Ends of the remanent tongues 12 and 13 over the winding 16, while through the winding 17

rag. no field arises, as this is transmitted through the diode 18

The coils 16 and 17 are wound and bridged. The field of the winding 16 magnetizes the

switched that when both coils are excited by tongue 12 in such a way that their free end is a magnetic

Currents with the same polarity which becomes the south pole along the axis 60. The field of the coil 16 also tries to

of the piston 10 generated magnetic fields, the tongue 13 in the direction of the existing

are directed in opposite directions. In particular, the magnetization are to be magnetized again, so that on

Control coils 16 and 17 in the case of the FIG. 1 dargestell- end of the pulse this existing magnetization

th embodiment example wound in the opposite direction is either unchanged or somewhat enlarged. In-

and connected in series. A diode 18 is 65 as a result of its magnetic aftereffect decreases

parallel to the coil 17, so that a parallel path to the tongue 12 a stable remanent magnetization

Spulel7 for currents of one polarity. Insolation state, which is the same direction as the

particular forms the diode 18 in FIG. 1 has an existing magnetization of the tongue 13.

5 6

Thus, the overlapping free ends to the coil 27 have the diode 31, which is a bridging element Tongues 12 and 13 result in magnetically opposite paths for negative currents. In the same way Polarity, so that the switching contacts are closed, the diode 32 is parallel to the coil 28, the one assume a state. Bridging path for positive currents results.

It follows that both the actuation 5 When the control circuit in FIG. 2 shown as a negative current is also applied to the release effect of the th version described, Relay is unlimited. That is, if there is also one, it flows through the bypassing coil 27 The current pulse amplitude is below that of the bridging diode 31 and through the coils 28 stood the switching contacts is not changed, so and 29, which oppositely directed axial the control pulse can generate this amplitude by 10 magnetic fields. The retentive Zunjeden Exceed amount without a reversal gene 24 and 26 are due to the opposite the change initially created is effected. Oppositely magnetized fields, so their This arises from the fact that when one free ends become magnetic north poles. There Release impulses to the control circuit on opposite poles repel each other, the reeds are set Magnetization of the tongues is applied, 15 contacts open. However, that part of the from the same current flows through both coils 16 and 17. the field generated by the coil 29, which acts on the tongue 23 Since the opposing magnetic fields act in, there is no opposing field in the coil have essentially the same strength, there is 27 no current flowing. Hence the retentive it is not possible that the field of one coil increases the magnetization of the tongue 22, and the The magnetization state of the ends of the tongues 22 and 23 free from the other coil 20 are de-encircled Affects tongue. Instead, opposing magnetic poles close because these tongues the lines of flux of the opposite fields are magnetized one in the same direction. The switching magnets Circle by passing through the soft contacts are thus made by the magnetic force magnetic bridging part 19 and closed from there.

via a return path through the air or via a 25 if to the control circuit a positive current Flow part of the return path, which is not laid out in the drawing, the coils 27 and 29 are excited, ter is shown. Furthermore, if an actuation occurs while the coil 28 is bridged by the diode 32 pulse to the control circuit shown in FIG. The axial fields of the energized coils are different is applied, the coil 16 is energized, directed opposite, so that the tongues 22 and 23 while through the coil 17 no current flows. If 30 have the same magnetic poles at their free ends Electricity exceeds a certain amount, will be wise. Thus the previously closed constants become magnetic state of the tongue 12 reversed open. Conversely, that part of the FeI switched the free ends of the tongues of the coil 29, which acts on the tongue 26, no due to the mutual magnetic attraction opposite field, so that the free ends of the of unequal poles close. If the magnetic 35 tongues 24 and 26 see unequal magnetic poles Field exceeds the small field that is required for actuation. The previously open contacts are therefore If the contacts are required, the actuation is closed.

effect only more positive. As in the embodiment shown in FIG

The changeover relay of FIG. 2 is also polarized in the magnetic flux produced in the coil 16 lines go through both tongues to the magneti- 40 and through positive unlimited effect both at see the circle close, so that the strength of the actuation as well as of the release are identified Pole draws on the overlapping free. Thus one also obtains ends with the toggle the tongues 12 and 13 is enlarged. relay all the advantages of the relay with one

Both the actuating and the releasing contact pair.

effect of the relay is positive, i. i.e., that open and 45 when a multitude of such relays to one Closing the switch contacts will be assembled by the counter-coordinate switch matrix, lateral attraction or repulsion of the magnetic results in a particularly advantageous way of working. Poles at the opposite free ends In particular, a large number of relays of the in of the tongues and not by the mechanical rigidity shown in Fig. 1 in a coordinate switching unit of the tongues. Furthermore, because of 50 matrix, as shown in Figure 3, arranged the remanent magnetization of the tongues in the be. Here, corresponding parts are through the execution the F i g. 1 the contacts are marked with the same reference numbers after they have ceased, namely also Control current in the actuated or released additionally with indices, which the coordinates of the State locked. Mark the intersection. One end of the control in F i g. 2 is a changeover relay corresponding to the 55 circle, each relay is with a horizontal or Invention shown, which consists of two reed switches Ji-conductor connected, while the other end over of the type described above. One tongue has a current blocking diode 40 with a vertical or each switch is connected by one of the two control winding F conductors. In addition, every overlay surrounded, while the other tongue of both bridging diode 18 with a second vertical or Switch surrounds a single control winding. This is how 60 F 'conductors are connected, the tongues 22 and 24 from the control coils 27 and by applying a negative potential

and the two tongues 23 and 26 of the coil becomes an F 'conductor and the earth to a Η conductor surround. The coil 27 is in series with the intersection of these two conductors, and only this one Coil 28, which in turn operates in series with the coil 29 crossing point. Switched to the posi by creating a posi is. The coils 27 and 28 are connected to an F-conductor and the earth at 65 tive potential kelt and switched that when the same current flows, an iZ conductor becomes the intersection of these two mes through both coils oppositely directed conductors, and only this cross point is released. the axial fields would be generated. However, there are current blocking diodes in parallel, which are indicated by the reference number 40

with the respective index, prevent a current from flowing in undesired paths between the H and F conductors. Thus, coincident actuation and release of any cross point in the assembly can be achieved without affecting the state of any other cross point.

Even if the described embodiments in the drawings with soft magnetic bridging parts, indicated by reference numeral 9 are represented, their use is not necessarily; they can also be left out. Furthermore, instead of the magnetically acting tongues used in the exemplary embodiments, which work as control parts responding to short control impulses, also soft magnetic tongues can be used together with external magnetically acting control parts. For example the control parts can consist of magnetically acting sleeves that surround the tongues, as it z. As described in U.S. Patent 2,877,316. These sleeves can be used in the same or opposite sense in the same way as the tongues shown in the drawings are magnetized, they then generate equal or opposite fields in the tongues, so that these Tongues close the contacts when the fields are the same or open the same when the fields are opposite are.

30th

Claims (6)

Patent claims: 1. Latching, pulse-controlled thermowell contact relay with a pair of remanent magnetic control members, the z. B. are designed as contact tongues, and two control coils, which are connected in series and generate essentially the same but opposite magnetic fields, each control member being surrounded by a control coil, characterized in that that for depending on a control current of a first polarity a of the coils and for excitation taking place as a function of a control current of a second polarity an asymmetrically conductive device is provided for both coils. 2. Relay according to claim 1, characterized in that as an asymmetrically conductive device a diode is provided. 3. Relay according to claim 1, characterized in that the asymmetrically conductive device is connected in parallel to one of the coils, so that they allow a current flow of the first Bridged polarity. 4. Relay according to claim 1 to 3, characterized in that the tongues of the reed switch consist of non-remanent magnetic material and the control elements at least one have the tongues surrounding sleeve of remanent magnetic material. 5. Relay according to one of claims 1 to 4, characterized in that the relay is a second Has a pair of remanent magnetic control elements and a third control coil, which the one of the control members of the second pair surrounds that the second control coil the other control members of both pairs surrounds that two asymmetrically conductive devices parallel to the first or third control coil for a current flow of one or the other polarity Bridging the first and third control coil are connected that the first control coil to Generating a magnetic field is designed that that of the second control coil when energized by control currents of one polarity is opposite that the third control coil to generate a magnetic field is designed that that of the second control coil when energized by Control currents of the other polarity is opposite, and that the magnitude of this is opposite Magnetic fields is essentially the same. 6. Application of the relay according to one of claims 1 to 4, characterized in that it Part of a switching matrix is a coordinate control matrix with a plurality of identical relays which in turn form a plurality of horizontal conductors and a plurality of vertical conductors Conductor pairs has that each of the two conductors of each vertical pair of conductors is different Polarity of the control current is assigned, and that the relay at the cross points of the vertical Conductor pairs are connected to the horizontal conductors, so that at each cross point the first coil of the associated relay with one of the vertical conductors via a Another asymmetrically conductive device is connected to the second coil of the relay with the horizontal conductor is connected and the junction of the first and second coil with connected to the other of the vertical conductors via the first asymmetrically conductive device. Considered publications:
German Auslegeschrift No. 1,059,516;
French patent specification No. 1 270 860. 1 sheet of drawings 509 598/239 6.65 @ Bundesdruckerei Berlin