CA1169897A - Polarized relay - Google Patents
Polarized relayInfo
- Publication number
- CA1169897A CA1169897A CA000409568A CA409568A CA1169897A CA 1169897 A CA1169897 A CA 1169897A CA 000409568 A CA000409568 A CA 000409568A CA 409568 A CA409568 A CA 409568A CA 1169897 A CA1169897 A CA 1169897A
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- armature
- yoke
- yokes
- movable block
- coil
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Abstract
ABSTRACT
A polarized relay of this invention comprises a yoke having air gaps at four diametrically opposite positions, an H-shaped armature block having four contact pole portions positioned in the air gaps in the yoke. The yoke comprises two yoke units, each yoke unit comprising a substantially U-shaped first magnetic plate, a permanent magnet with one of its poles being located at the middle of the lower side of the first magnetic plate, and a second magnetic plate contacted with the other pole of the permanent magnet and defining air gaps between its opposite ends and the free ends of the first magnetic plate. The polarized relay according to this invention is featured by quick action, high sensitivity, and superior shock resistance, in that the armature block, which is a moving part, is lightweight because it does not contain the permanent magnets, and in that the magnetic efficiency is high because of the absence of the permanent magnets in the path of the magnetic flux of the magnet coil.
A polarized relay of this invention comprises a yoke having air gaps at four diametrically opposite positions, an H-shaped armature block having four contact pole portions positioned in the air gaps in the yoke. The yoke comprises two yoke units, each yoke unit comprising a substantially U-shaped first magnetic plate, a permanent magnet with one of its poles being located at the middle of the lower side of the first magnetic plate, and a second magnetic plate contacted with the other pole of the permanent magnet and defining air gaps between its opposite ends and the free ends of the first magnetic plate. The polarized relay according to this invention is featured by quick action, high sensitivity, and superior shock resistance, in that the armature block, which is a moving part, is lightweight because it does not contain the permanent magnets, and in that the magnetic efficiency is high because of the absence of the permanent magnets in the path of the magnetic flux of the magnet coil.
Description
SPECIFICATION
TITLE: Polarized Relay The present invention relates to the so-called polarized relay wherein a permanent magnet is placed in a magnetic circuit composed of an armature and a yoke, the armature being moved by superposing the magnetomotive force of the coil on the magnetic flux of said permanent magnet, and particularly to a polarized relay of the type adapted to move the armature horizontally back and forth.
BACKGROUND ART
Ordinary polarized relays have such a construction that the center of the armature is pivotally supported so that the armature swings into contact with two contact pole surfaces of the yoke at diametrically opposite positions.
Polarized relays of such construction have a problem that unless the three points, i.e., the diametrically opposite contact pole surfaces of the armature and the central pivot, are maintained in dimensionally accurate relationship, one contact pole surface alone would be contacted, causing variation of working opening characteristics and lack o~ armature stroke.
.~
~ 1 1 69~97 Thus, a solution to this problem has already been proposed, which emplo~s a construction adapted to move the armature horizontally back and forth.
For example, Japanese Patent Publication No. 41005/
1980 (hereinafter referred to as the first prior art) has been proposed.
This will now be described with reference to the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic view illustrating the basic principle for embodying a polarized relay;
Fig. 2 is a sectional view showing an application of the basic principle in Fig. 1 to a movable contact block which travels horizontally;
Fig. 3 is a side elevation, in section, of the device of Fig. 2;
Fig. 4 is a plan view, in section, of the device of Fig O 2;
Fig. 5 is a perspective exploded view of the device of Fig. 2;
Fig. 6 is a perspective exploded view of another embodiment wherein first and second yokes and permanent magnets are in cylindrical form;
Fig. 7 is a schematic view illustrating the basic principle applied to another embodiment wherein the contact pole surfaces of the second yokes are enlarged to design the armature as the unidirectional operation type;
~ 9 rl - 2a -Fig. 8 is a schematic view illustrating the basic principle applied to another embodiment wherein the armature is divided at the middle into tow halves to provide the tridirectional operation type;
Figs. 9 and 10 are views showing operations in directions different from that in Fig . 8;
Fig. 11 is a sectional view showing the basic principle in Fig. 1 applied to an armature and a movable block which are adapted to travel vertically;
Fig. 12 is a view illustrating the basic principle of the first prior art; and Fig. 13 is a view illustrating the basic principle of the second prior art.
In Fig. 12 of the drawings an upper piece 102, middle piece 103 and lower piece 104 constitute an E type yoke 101, said middle piece 103 having a coil ins-talled thereon, and said upper, middle and lower pieces 102, 103 and 104 having a permanent magnet 106, serving as a common armature, opposed thereto. The direction of the magnetic flux produced by the permanent magnet 106 is indicated by X and the direction of the magnetic flux produced by the coil 105 is indicated by Y.
Therefore, the magnetic flux directions X and Y in the gap bet-ween the pieces 102, 103, 104 and the permanent magnet 106 are opposite to each other, resulting in a repulsion force which causes the permanent magnet 106 serving as the armature to move horizont-ally in the direction of arrow Z.
I 1 69~97 - 2b -Subsequently, if a coil current flows such that the magnetic flux of the coil 105 takes the opposite direction, this ma~netic flux is in the same direction as the ma~netic flux X of the permanent magnet and superposed on the latter, so that the permanent magnet 106, which i.s the armature, is attracted~
I 1~g~,97 In this polarized relay according to the first prior art, since the magnetomotive flux of the coil 105 passes through the permanent magnet 106, the following problem arises: The permanent magnet 106 has a magnetic reluctance of about 10,000 times as high as that of the ordinary yoke (iron) and involves a high percentage loss of the magnetomotive flux of the coil 105, thus decreasing the sensitivity of the system.
To solve the problem described above, a polarized relay having a construction shown in French Patent No.
2358006 (hereinafter referred to as the second prior art) has been proposed.
This utilizes the advantage of high sensitivity brought about by the fact that the magnetomotive flux of the coil does not pass through the permanent magnet.
This will now be descrihed with reference to Fig. 13.
Two vertical magnetic pieces 202, 203 and a core 210a constitute a U-shaped yoke 201, while a permanent magnet 207, a first magnetic piece 205 contacted with one pole of said permanent magnet, and a second magne-tic piece 206 contacted with the other pole of said permanent magnet constitute an armature block 204, said first magnetic piece 205 being U-shaped with its vertical pieces 208 and 209 opposed to the outer surfaces of the vertical pieces 202 and 203 of said U shaped yoke 201. The second magnetic piece 206 is opposed to the inner surfaces o~ the vertical pieces 202 and 203 of said U-shaped yoke 201, 1 J 69~97 and the permanent magnet 207 is held between said first and second magnetic pieces 205 and 206. A coil 210 is installed on the U-shaped yoke 201.
In this case of the second prior art, the magnetic flux X due to the permanent magnet 207 flows through two magnetic circuits, each extending from one pole of the permanent magnet 207 through the first and second magnetic pieces 205 and 206 of the armature block 204 and back to the other pole of the permanent magnet 207;
it also flows through a magnetic circuit extending from one pole of the permanent magnet 207 successively through the second magnetic piece 206 of the armature block 204, U-shaped yoke 201 and the first magnetic piece 205 of the armature block 204 and back to the other pole of the permanent magnet 207. The magnetic flux due to the coil 201 flows through a magnetic circuit extending successively through the core 210a, the-right hand side vertical piece 203 of the U-shaped yoke 201 (or the left-hand side vertical piece 202 in the case of the reverse movement of the armature block), the first magnetic piece 205 of the armature hlock, the permanent magnet 207, the second magnetic piece 206 and the left-hand side vertical piece 202 of the U-shaped yoke 201 (or ~he left-hand side vertical piece 203 in the case of the reverse movement of the armature block).
Therefore, if the directions X and Y of the magnetic 1uxes in the gaps between the respective magnetic poles I .~ 69P)97 of the armature block 204 and U-shaped yoke 201 are opposite to each other, they repel each other and if the directions are -the same, they attract each other, so that the armature block 204 will move horizontally in either direction depending upon the direction of the current flowing through the coil 210.
In this second prior art, the magnetic flux Y of the coil 210 does not flow through the permanent magnet 207; thus, the problem confronting the first prior art is solved.
However, this second prior art has another problem owing to the employment of the construction in which the permanent magnet is included in the armature block.
That is, because of the presence of the permanent magnet in the armature block, the speed of the armature block movement is slower by an amount corresponding to the weight of the permanent magnet 207, while the increased block weight results in a higher percussive force, which increases vibration. Further, because of gravity, the characteristics become unbalanced depending upon the direction in which it is installed.
Another problem in the second prior art resides in the fact that the yoke 201 is present only in the upper region of the armature block 204 and the latter requires a vertically extendiny allowable space between ît and the guide for its horizontal back and forth movement, so that it is pulled toward the yoke by an amount corresponding } :3 6~897 to said space at all times.
Therefore, the direction of the yoke 201 changes depending upon the direction of installation, and because of the weight of the armature block 204, the characteristic become unbalanced, as in the above.
FurthQr, an embodiment of a polari~ed relay charac-terized by a horizontal back and forth movement of said armature has not been disclosed and is by no means easy.
As a third prior art, there exists United States Patent No. 2794882, which discloses the so-called nonpolarized relay having no permanent magnet installed therein.
DISCLOSURE OF THE INVENTION
The present invention has solved the various problems in these conventional polarized relays and provides a polarized relay which is advantageous in the production and applications of polarized relays. According to the invention, a permanent magnet is disposed between a first and a second yoke, said first and second yokes and said permanent ma~net constituting one block there being another similar block,these blocks being disposed one above the other, while two lateral pieces adapted to be moved into and out of contact with the contact pole surfaces of said upper and lower first and second yokes, and a horizontal bar which connects said lateral pieces and which extends through a coil constitute a horizontal .
-- 7 ~
travel type armature, the advantage of the horizontal travel type arma~ure being utilized to provide novel developments..
Another object of the invention is to reduce the percentage loss of the magnetomotive flux of the coil and increase the sensitivity~ by preventing the magnetic flux of the coil from passing through ~he permanent magnets.
A further object of the invention is to avoid the installation of the permanent magnets on the armature to reduce the mass of the armature and increase the speed of the armature movement.
An additional object of the invention is to arrange yokes and permanent magnets above and below an armature to maintain the balance and prevent variation of the operating characteristics due to the direction of installation.
Yet another object of the invention is to embody a polarized relay of the type in which the armature is horizontally moved.
In this polarized relay, according to Figs. 1 through 11, a first yoke 1 is composed, in U-shape, of two lateral pieces 2 and 3 and a horizontal piece 4 connecting said lateral pieces 2 and 3, with the inner surface of said lateral pieces 2 and 3 forming contact pole suxfaces 2a and 3a. A second yoke 5 is shorter than the distance between the lateral pieces 2 and 3 of the J 1 69~3 9 r~
first yoke and is opposed to the horizontal piece 4.
The outer surfaces of the second yoke 5 provide contact pole surfaces 5a and 5b. A permanent magnet 6 is disposed between the first and second yokes and the direction of its magnetization axis is vertical. The first and second yokes 1 and 5 and permanent magnet 6 form one block and there is another similar block, these blocks being disposed one above the other. An armature 7 is of the horizontal travel type, and is composed, in H-shape, of two lateral pieces 8 and 9 and a horizontal bar 10 connecting said lateral pieces 8 and 9, with the inner and outer surfaces of said lateral pieces 8 and 9 providing contact pole surfaces 8a, 8b, 9a~ 9b.
The inner and outer contact pole surfaces 8a, 8b, 9a, 9b of the lateral pieces 8 and 9 are opposed to the inner and outer contact pole surfaces 2a~ 3a, 5a, 5b of said first and second yokes 1 and 5, defining air gaps a, b, c, d, respectively. The horizontal bar 10 of the armature 7 extends through a coil 11.
Thus, the magnetic circuits of the permanent magnet 6 and coil 11 are as shown in Fig. 1, which illustrates the basic principle, wherein solid lines X indicate the flux of the permanent magnet 6 and dotted lines Y the magnetromotive flux of the coil 11.
In Fig. 1, the magnetic flux X of the permanent magnet 6 flows as follows.
N pole of permanent magnet 6 -~ second yoke 5 ~ air ---` 1 3 6~ 7 .
gaps ~ and c -~ lateral pieces 8, 9 of armature 7 ~ air gaps a, d -~ lateral pieces 2, 3 of first yoke 1 ~ horizontal piece 4 -~ S pole.
The magnetic flux Y of the coil 11 flows as follows.
Coil 11 -~ horizontal bar 10 of armature 7 ~ left-hand side piece 8 . air gap a left-hand side piece 2 of first yoke 1 ~ horizontal piece 4 ~ right-hand side piece 3 ~ air gap d ~ right-hand side piece 9 of arma-ture 7 ~ horizontal bar 10.
There is another path: Left-hand side piece 8 of armature 7 ) air gap b ~ second yoke 5 ~ air gap c ~ right-hand side piece 9 of armature 7 ~ horizontal bar 10.
An observation of the air gaps a, b, c, d will show that the magnetic fluxes X and Y of the permanent magnet 6 and coil 11 are equal in direction at the air gaps a and c and are opposite in direction at the air gaps b and d.
Therefore, in the first and second yokes 1, 5 and armature 7, the magnetic fluxes X and Y, where they are equal in direction and superposed, give an attraction force and, where they are opposite in direction and cancel each other, give a repulsion force, so that, in Fig. 1, the armature 7 horizontally travels to the left as indicated by the arrow Z until the outer contact pole surface 8a of the left-hand side piece 8 of the armature 7 contacts the inner contact pole surfaces 2a of the right-hand side pieces 2 of the first yokes 1 and the inner contact pole surface 9a of the right-hand side 8 9 ~
piece 9 of the armature 7 contacts the outer contact pole surfaces 5b of the second yokes 5.
This contacted state, even if the current flowing through the the coil 11 is cut off, is maintained by the magnetic fluxes of the permanent magnets 6.
When it is desired to cause the armature 7 to horizontally travel to the ri~ht, which is reverse to the above, a current opposite in direction to the above is passed through the coil ll to cause the magnetomotive flux Y to act in a manner reverse to Fiy. l.
The directions of the magnetic fluxes in the air gaps a, b, c, d are reversed; they are opposite at the air gaps a and c and e~ual at the air gaps b and d, so that the armature 7 horizontally travels to the right as indicated by the arrow W.
The contacted state is maintained by the magnetic fluxes of the pexmanent magnets 6, as in the above case.
- Judging from this, the magnetomotive flux Y of the coil ll will never pass -through the permanent magnets 6, whose magnetic reluctance is high; thus the sensitivity is hiyh.
The armature 7, which is separate from the coil ll and permanent magnets 6, travels by itself, and its mass is as small as can be.
The arrangement shown in Figs. 2 through 5 is based on the basic principle illustrated in Fig. l.
The upper and lower first yokes l are housed in a top-opened box 12 of synthetic resin.
~ ~ ~9~39'7 In this case, the upper and lower first yokes 1 are seated on the bottom wall 13 of the box 12 in a state where they have been turned through 90 degrees from the Fig. 1 state, with its left-hand side lateral piece 2 and hori~ontal piece 4 contacted with the lateral wall 14 of the box.
The bobbin 15 for the coil 11 is constructed as follows.
The coil 11 is wound on a drum portion 16 having a hole.17 through which the armature 7 extends, said drum portion being integrally formed with lateral walls 18 and 19 between which the upper and lower second yokes 2, turned through 90 degrees from the Fig. 1 state, are fixed in position in parallel with the coil 11. The lateral walls 18 and 19 are formed with notches 20 to facilitate the installation of the second yokes 5. trhe right-hand side wall 19 is formed with grooves 21 to receive support edge terminals 22.
A cover 23 of synthetic resin is fitted over the top opening in the box 12. An insulation plate 24 is interposed between the cover 23 and the box 12.
The cover 23 is constructed as follows~
The cover 23 comprises a top wall 25, lateral walls 26 including low opposite late.ral walls, outer separators 27 connecting said top wall 25 and low lateral walls 26 and dividing them into sections/ inner separators 28 aligned with said outer separators 27~ and a downwardly I ~ 69~9 opened cavity 29 crossing said inner separators 28.
Outer terminals 30 are fixed in opposite outer chambers defined by said opposite lateral walls 26 of the cover 23 and the outer separators 27. The opposite terminals 30 at the right-hand extremity have integrally formed, vertical insert edges 31 adapted to be inserted in the support edge terminals 22 of the coil bobbin 15 to complete electric connection to the coil 11 when the cover 23 and box 12 are assembled together. The other terminals 30 are provided with fixed contacts 32 and positioned in opposite i.nner chambers 33 defined by the inner separators 28, A movable block 34 of synthetic resin adapted to move in parallel with the armature 7 is positioned in the downwardly opened cavity 29 in the cover 23.
The movable block 34 is formed with throughgoing transverse holes 35 at positions associated with the inner chambers 33 of said cover 23, where there are installed contact plates 36 provided with contacts 37 protruding to the opposite sides, and coil springs 38 for contact pressure. The contacts 37 in the movable block 34 and the con-tacts 32 in the cover 23 are opposed to each other in the inner chambers 33 and move into and out of engagement with each other as the movable block 34 is moved.
Connection between the movable block 34 and the armature 7 is effected by a reversing lever 33.
9~97 The reversins lever 39 receives a shaft 40 in the middle thereof/ said shaft 40 being supported in shaft-receiving holes 41 in the right-hand side wall 19 of the coil bobbin 15.
In the relationship between the reversing lever 39 and the armature 7, a shaft 42 is inserted in the lower end of the reversing lever, said shaft being fitted in a groove 44 in a connector 43 from above, and the right-hand end of the armature 7 is inserted in said connector 43 and cripmed to form an anti-slip-off portion 7b.
The left-hand end of the armature 7 is inserted in a left-hand side piece 8 and likewise crimped to form an anti-slip-off portion 7a. At the same time as the formation of this anti-slip-off portion, a nonmagnetic plate 45 is installed. These plates 45 are provided in order to cut off the opposite ends of the magnetic characteristic curve of the permanent magnets 6 so tha-t the latter may be used in the most stable region of the curve.
In the relationship between the reversing lever 39 and the movable block 34, the upper end 39a of said lever is engaged in a downwardly opened notch 46.
Therefore, if the armature 7, in Fig~ 2, horizontally travels to the right as indicated by the arrow Z, the reversing lever 39 is turned counterclockwise around the axis of the central shaft 40, causing the movable block 34 to travel horizontally to the left as indicated by the 1 ~ 6 ~
arrow V, which is opposite to the direction of travel of the armature, effecting engagement between the contacts 32 and 37 in the chambers. This engagement is maintained by the masnetic fluxes of the permanent magnets 6 on the basis of the principle illustrated in Fig. 1.
The armature 7 is resiliently urged in the direction of arrow ~ by an angle plate spring 47. The angle plate spring 47 has its apex 47a abutting against the left-hand side anti-slip~off portion 7a and its opposite ends 47b abutting against the left-hand side wall 14 of the box.
The movable block 34 is resiliently urged by a coil ~ spring 48 in a direction opposite to the direction of arrow V. The coil spring 48 is positioned between an indicator post 49 on the movable block 34 and the left-hand side wall 26 of the cover 23.
The spring pressures of these two springs ~7 and 48 act in opposite directions relative to -the armature 7 and movable block 34, facilitating separation of -the armature 7 as the latter is moved away Erom the state of being attracted by -the magnetic fluxes of the permanent magnets 6.
The indicator post 49 on the movable block 37 projects upwardly through a small hole 50 in the top wall 25 of the cover 23 and its position enables the internal action to be ascertained from outside.
A terminal cover 51 is fitted over the top wall 25 of the cover 23. Screwdriver-operating holes 53 ` 1 ~ 69~3(J7 corresponding in number to the opposite terminals 30 are present in the terminal cover 51.
For attaching purposes, hooked legs 54 are provided on opposite sides, aaapted to be inserted in small holes 55 in the top wall 25. The terminal cover 51 is provided on opposite sides thereof with dependent skirts 56 each positioned between adiacent outer separators 27 of the cover 23 to minimize the exposure of the terminals 30.
Fig. 6 will now be described.
This shows another embodiment of the invention, not departing from the basic principle illustrated in Fig. 1.
In this embodiment, the first and second yokes 1 and 5 and permanent magnets 6, which, in Figs. 2 through 5, have ~een shown as being in plate form and as being separately disposed, are in cylindrical form, and the number of parts is reduced. In this case, a cylindrical first yoke 57 is divided into a cylindrica1 body 57a and a cap 57b, which are united together by a thread 58.
With the cap 57b removed, a cylindrical second yoke 59 and a cylindrical permanent magnet 60 are recei~ed.
In Fig. 7, the area of the right-hand side contact pole surface 5b of the second yoke 5 is made greater than that of the left-hand side contact pole surface 5a.
This is realized by a lateral piece 6, providing an increased amount of magnetic flux to intensify thc magnetic flux of the permanent magnet 6; thus, thc , - I ~ 6 9 ~3 9 ~
arrangement provided the so-called unidirectîonal operation type (also referred to as the monostable type) wherein if the current through the coil 11 is cut off when the armature 7 has moved in the direction of arrow W, it is moved back in the direction of arrow Z by the magnetic flux of the strong permanent magnet 6.
Figs. 8 through 10 will now be described.
The arrangment shown therein is of the so-called tridirectional operation type ~also referred to as the triple stable type) wherein the horizontal bar 10 of the armature 7 is divided at the middle into two halves which are symmetrical, with a coil spring 62 interposed between said halves 7a and 7b to resiliently outwardly urge the halves away from each other.
Fig. 8 shows a first operation state wherein the magnetic fluxes of the permanent magnets 6 alone are in action, with halves 7a and 7b resiliently outwardly urged away from each other by the coil spring 62, so that in the air gaps a and d, the lateral pieces 2 and 3 of the first yokes 1 and the lateral pieces 8 and 9 of the armat~re 7 are attracted into contact with each other while, in the air gaps b and c, the second yokes 5 and the lateral pieces 8 and 9 of the ar~ature 7 are spaced apart.
Fig. ~ shows a second operation state wherein with a current flowing through the coil in such a direction as to cause the coil to produce a magnetomotive flux Yl, ~ ~989~
~he magnetomotive flux Yl of the coil 11 and the magnetic ~luxes X of the permanent magnets 6 are opposite in ~irection at the air gaps a and e and are equal in direction at the air gaps b and d. Therefore, as compared with Fiy.
~, the left-hand side half 7a alone is moved to the right .lS indieated by the arrow W against the force of the coil spring 62, so that the second yokes 5 and the left-hand side piece 8 on the left-hand side half 7a are contacted ~ith eaeh other, while the right-hand side piece 9 of the ~ight-hand side half 7b remains in eontact with the right hand side pieces 3-oE the first yokes 1. If eurrent through the eoil 11 is cut off, the state shown in Fig~ 8 is restored.
Fig. 10 shows a third operation state wherein with a current flowing through the coil 11 in such a direction as to cause the eoil to produce a magnetomotive flux Y2 ~hich is opposite in direction to the one shown in E~ig. 9, ~he magnetomotive flux Y2 of the coil 11 and the magnetic fluxes X of the permanent magnets 6 are equal in direct.ion ~t the air yaps a and c and opposite in direction at the ._ _ c~ir gaps b and d. Therefore, as compared with Fig. 8 ._ only the right-hand side half 7b is moved to the left _ as indicated by the arrow Z against the force of the _ coil spring 62, so that the left-hand side pieces 2 of _ the irst yokes 1 and the left-hand side piece 8 of the left-hand side half 7a continue to be contacted and the ___ ~ S-econd yokes 5 and the right-hand side half 7b are _ .
contacted. If the current through the coil 11 is cut of, 1 1 69~97 - 18 ~
the state shown in Fig. 8 is restored.
Fig. 11 shows a further development of the basic principle illustrated in Fig. 1.
While the armature 7 and movable block 34 in the embodiment shown in Figs. 2 through 5 are hori70ntal and parallel with each other, in this embodiment the armature 7 and movable block 34 are vertically disposed one above the other on the same line. The basic parts are shown in section taken in the same direction as in Fig. 2.
The angle plate spring 47 is seated on the bottom wall 13 of the box 12, and the left-hand side pieces 2 of the first yokes 1 are also seated thereon.
Downwardly opposed to the apex 47a of the angle plate spring 47 is the left-hand side anti-slip-off portion 7a of the armature 7. The right-hand side anti-ship-off portion 7b of the armature 7 is upwardly directed, and a connector 63 which is U-shaped is joined at its lower piece 64 to said right-hand side anti-slip-off portion 7b, with small holes 66 in the opposite lateralpieces 65 of said connector receiving a second angle plate spring 67 whose opposite ends 67b abut against the opposite support steps 68 in the cover 23. This angle spring 67 exerts the same action as the coil spring 48 used in the embodiment shown in Figs. 2 through 5 on the armature 7 and on the movable block 34 which is adapted to travel vertically and coaxially with the 1 3 ~9~(37 armature 7. Therefore, the lower angle plate spring 47 upwardly resiliently urges the armature 7 and movable block 34 while the upper angle plate spring 67 downwardly resiliently urges them at all times. The connection between the movable block 34 and the connector 63 is effected by inserting a shaft 71 in the shaft receiving holes 69 in the opposite lateral pieces 65 of the connector 63 and the shaft receiving hole 70 in the movable block 34. The box 12 and cover 23 are connected together by connecting screws 72.
The contacts 32, 37, therminal cover 51, etc., are the same as in the embodiment in Figs. 2 through 5.
TITLE: Polarized Relay The present invention relates to the so-called polarized relay wherein a permanent magnet is placed in a magnetic circuit composed of an armature and a yoke, the armature being moved by superposing the magnetomotive force of the coil on the magnetic flux of said permanent magnet, and particularly to a polarized relay of the type adapted to move the armature horizontally back and forth.
BACKGROUND ART
Ordinary polarized relays have such a construction that the center of the armature is pivotally supported so that the armature swings into contact with two contact pole surfaces of the yoke at diametrically opposite positions.
Polarized relays of such construction have a problem that unless the three points, i.e., the diametrically opposite contact pole surfaces of the armature and the central pivot, are maintained in dimensionally accurate relationship, one contact pole surface alone would be contacted, causing variation of working opening characteristics and lack o~ armature stroke.
.~
~ 1 1 69~97 Thus, a solution to this problem has already been proposed, which emplo~s a construction adapted to move the armature horizontally back and forth.
For example, Japanese Patent Publication No. 41005/
1980 (hereinafter referred to as the first prior art) has been proposed.
This will now be described with reference to the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a schematic view illustrating the basic principle for embodying a polarized relay;
Fig. 2 is a sectional view showing an application of the basic principle in Fig. 1 to a movable contact block which travels horizontally;
Fig. 3 is a side elevation, in section, of the device of Fig. 2;
Fig. 4 is a plan view, in section, of the device of Fig O 2;
Fig. 5 is a perspective exploded view of the device of Fig. 2;
Fig. 6 is a perspective exploded view of another embodiment wherein first and second yokes and permanent magnets are in cylindrical form;
Fig. 7 is a schematic view illustrating the basic principle applied to another embodiment wherein the contact pole surfaces of the second yokes are enlarged to design the armature as the unidirectional operation type;
~ 9 rl - 2a -Fig. 8 is a schematic view illustrating the basic principle applied to another embodiment wherein the armature is divided at the middle into tow halves to provide the tridirectional operation type;
Figs. 9 and 10 are views showing operations in directions different from that in Fig . 8;
Fig. 11 is a sectional view showing the basic principle in Fig. 1 applied to an armature and a movable block which are adapted to travel vertically;
Fig. 12 is a view illustrating the basic principle of the first prior art; and Fig. 13 is a view illustrating the basic principle of the second prior art.
In Fig. 12 of the drawings an upper piece 102, middle piece 103 and lower piece 104 constitute an E type yoke 101, said middle piece 103 having a coil ins-talled thereon, and said upper, middle and lower pieces 102, 103 and 104 having a permanent magnet 106, serving as a common armature, opposed thereto. The direction of the magnetic flux produced by the permanent magnet 106 is indicated by X and the direction of the magnetic flux produced by the coil 105 is indicated by Y.
Therefore, the magnetic flux directions X and Y in the gap bet-ween the pieces 102, 103, 104 and the permanent magnet 106 are opposite to each other, resulting in a repulsion force which causes the permanent magnet 106 serving as the armature to move horizont-ally in the direction of arrow Z.
I 1 69~97 - 2b -Subsequently, if a coil current flows such that the magnetic flux of the coil 105 takes the opposite direction, this ma~netic flux is in the same direction as the ma~netic flux X of the permanent magnet and superposed on the latter, so that the permanent magnet 106, which i.s the armature, is attracted~
I 1~g~,97 In this polarized relay according to the first prior art, since the magnetomotive flux of the coil 105 passes through the permanent magnet 106, the following problem arises: The permanent magnet 106 has a magnetic reluctance of about 10,000 times as high as that of the ordinary yoke (iron) and involves a high percentage loss of the magnetomotive flux of the coil 105, thus decreasing the sensitivity of the system.
To solve the problem described above, a polarized relay having a construction shown in French Patent No.
2358006 (hereinafter referred to as the second prior art) has been proposed.
This utilizes the advantage of high sensitivity brought about by the fact that the magnetomotive flux of the coil does not pass through the permanent magnet.
This will now be descrihed with reference to Fig. 13.
Two vertical magnetic pieces 202, 203 and a core 210a constitute a U-shaped yoke 201, while a permanent magnet 207, a first magnetic piece 205 contacted with one pole of said permanent magnet, and a second magne-tic piece 206 contacted with the other pole of said permanent magnet constitute an armature block 204, said first magnetic piece 205 being U-shaped with its vertical pieces 208 and 209 opposed to the outer surfaces of the vertical pieces 202 and 203 of said U shaped yoke 201. The second magnetic piece 206 is opposed to the inner surfaces o~ the vertical pieces 202 and 203 of said U-shaped yoke 201, 1 J 69~97 and the permanent magnet 207 is held between said first and second magnetic pieces 205 and 206. A coil 210 is installed on the U-shaped yoke 201.
In this case of the second prior art, the magnetic flux X due to the permanent magnet 207 flows through two magnetic circuits, each extending from one pole of the permanent magnet 207 through the first and second magnetic pieces 205 and 206 of the armature block 204 and back to the other pole of the permanent magnet 207;
it also flows through a magnetic circuit extending from one pole of the permanent magnet 207 successively through the second magnetic piece 206 of the armature block 204, U-shaped yoke 201 and the first magnetic piece 205 of the armature block 204 and back to the other pole of the permanent magnet 207. The magnetic flux due to the coil 201 flows through a magnetic circuit extending successively through the core 210a, the-right hand side vertical piece 203 of the U-shaped yoke 201 (or the left-hand side vertical piece 202 in the case of the reverse movement of the armature block), the first magnetic piece 205 of the armature hlock, the permanent magnet 207, the second magnetic piece 206 and the left-hand side vertical piece 202 of the U-shaped yoke 201 (or ~he left-hand side vertical piece 203 in the case of the reverse movement of the armature block).
Therefore, if the directions X and Y of the magnetic 1uxes in the gaps between the respective magnetic poles I .~ 69P)97 of the armature block 204 and U-shaped yoke 201 are opposite to each other, they repel each other and if the directions are -the same, they attract each other, so that the armature block 204 will move horizontally in either direction depending upon the direction of the current flowing through the coil 210.
In this second prior art, the magnetic flux Y of the coil 210 does not flow through the permanent magnet 207; thus, the problem confronting the first prior art is solved.
However, this second prior art has another problem owing to the employment of the construction in which the permanent magnet is included in the armature block.
That is, because of the presence of the permanent magnet in the armature block, the speed of the armature block movement is slower by an amount corresponding to the weight of the permanent magnet 207, while the increased block weight results in a higher percussive force, which increases vibration. Further, because of gravity, the characteristics become unbalanced depending upon the direction in which it is installed.
Another problem in the second prior art resides in the fact that the yoke 201 is present only in the upper region of the armature block 204 and the latter requires a vertically extendiny allowable space between ît and the guide for its horizontal back and forth movement, so that it is pulled toward the yoke by an amount corresponding } :3 6~897 to said space at all times.
Therefore, the direction of the yoke 201 changes depending upon the direction of installation, and because of the weight of the armature block 204, the characteristic become unbalanced, as in the above.
FurthQr, an embodiment of a polari~ed relay charac-terized by a horizontal back and forth movement of said armature has not been disclosed and is by no means easy.
As a third prior art, there exists United States Patent No. 2794882, which discloses the so-called nonpolarized relay having no permanent magnet installed therein.
DISCLOSURE OF THE INVENTION
The present invention has solved the various problems in these conventional polarized relays and provides a polarized relay which is advantageous in the production and applications of polarized relays. According to the invention, a permanent magnet is disposed between a first and a second yoke, said first and second yokes and said permanent ma~net constituting one block there being another similar block,these blocks being disposed one above the other, while two lateral pieces adapted to be moved into and out of contact with the contact pole surfaces of said upper and lower first and second yokes, and a horizontal bar which connects said lateral pieces and which extends through a coil constitute a horizontal .
-- 7 ~
travel type armature, the advantage of the horizontal travel type arma~ure being utilized to provide novel developments..
Another object of the invention is to reduce the percentage loss of the magnetomotive flux of the coil and increase the sensitivity~ by preventing the magnetic flux of the coil from passing through ~he permanent magnets.
A further object of the invention is to avoid the installation of the permanent magnets on the armature to reduce the mass of the armature and increase the speed of the armature movement.
An additional object of the invention is to arrange yokes and permanent magnets above and below an armature to maintain the balance and prevent variation of the operating characteristics due to the direction of installation.
Yet another object of the invention is to embody a polarized relay of the type in which the armature is horizontally moved.
In this polarized relay, according to Figs. 1 through 11, a first yoke 1 is composed, in U-shape, of two lateral pieces 2 and 3 and a horizontal piece 4 connecting said lateral pieces 2 and 3, with the inner surface of said lateral pieces 2 and 3 forming contact pole suxfaces 2a and 3a. A second yoke 5 is shorter than the distance between the lateral pieces 2 and 3 of the J 1 69~3 9 r~
first yoke and is opposed to the horizontal piece 4.
The outer surfaces of the second yoke 5 provide contact pole surfaces 5a and 5b. A permanent magnet 6 is disposed between the first and second yokes and the direction of its magnetization axis is vertical. The first and second yokes 1 and 5 and permanent magnet 6 form one block and there is another similar block, these blocks being disposed one above the other. An armature 7 is of the horizontal travel type, and is composed, in H-shape, of two lateral pieces 8 and 9 and a horizontal bar 10 connecting said lateral pieces 8 and 9, with the inner and outer surfaces of said lateral pieces 8 and 9 providing contact pole surfaces 8a, 8b, 9a~ 9b.
The inner and outer contact pole surfaces 8a, 8b, 9a, 9b of the lateral pieces 8 and 9 are opposed to the inner and outer contact pole surfaces 2a~ 3a, 5a, 5b of said first and second yokes 1 and 5, defining air gaps a, b, c, d, respectively. The horizontal bar 10 of the armature 7 extends through a coil 11.
Thus, the magnetic circuits of the permanent magnet 6 and coil 11 are as shown in Fig. 1, which illustrates the basic principle, wherein solid lines X indicate the flux of the permanent magnet 6 and dotted lines Y the magnetromotive flux of the coil 11.
In Fig. 1, the magnetic flux X of the permanent magnet 6 flows as follows.
N pole of permanent magnet 6 -~ second yoke 5 ~ air ---` 1 3 6~ 7 .
gaps ~ and c -~ lateral pieces 8, 9 of armature 7 ~ air gaps a, d -~ lateral pieces 2, 3 of first yoke 1 ~ horizontal piece 4 -~ S pole.
The magnetic flux Y of the coil 11 flows as follows.
Coil 11 -~ horizontal bar 10 of armature 7 ~ left-hand side piece 8 . air gap a left-hand side piece 2 of first yoke 1 ~ horizontal piece 4 ~ right-hand side piece 3 ~ air gap d ~ right-hand side piece 9 of arma-ture 7 ~ horizontal bar 10.
There is another path: Left-hand side piece 8 of armature 7 ) air gap b ~ second yoke 5 ~ air gap c ~ right-hand side piece 9 of armature 7 ~ horizontal bar 10.
An observation of the air gaps a, b, c, d will show that the magnetic fluxes X and Y of the permanent magnet 6 and coil 11 are equal in direction at the air gaps a and c and are opposite in direction at the air gaps b and d.
Therefore, in the first and second yokes 1, 5 and armature 7, the magnetic fluxes X and Y, where they are equal in direction and superposed, give an attraction force and, where they are opposite in direction and cancel each other, give a repulsion force, so that, in Fig. 1, the armature 7 horizontally travels to the left as indicated by the arrow Z until the outer contact pole surface 8a of the left-hand side piece 8 of the armature 7 contacts the inner contact pole surfaces 2a of the right-hand side pieces 2 of the first yokes 1 and the inner contact pole surface 9a of the right-hand side 8 9 ~
piece 9 of the armature 7 contacts the outer contact pole surfaces 5b of the second yokes 5.
This contacted state, even if the current flowing through the the coil 11 is cut off, is maintained by the magnetic fluxes of the permanent magnets 6.
When it is desired to cause the armature 7 to horizontally travel to the ri~ht, which is reverse to the above, a current opposite in direction to the above is passed through the coil ll to cause the magnetomotive flux Y to act in a manner reverse to Fiy. l.
The directions of the magnetic fluxes in the air gaps a, b, c, d are reversed; they are opposite at the air gaps a and c and e~ual at the air gaps b and d, so that the armature 7 horizontally travels to the right as indicated by the arrow W.
The contacted state is maintained by the magnetic fluxes of the pexmanent magnets 6, as in the above case.
- Judging from this, the magnetomotive flux Y of the coil ll will never pass -through the permanent magnets 6, whose magnetic reluctance is high; thus the sensitivity is hiyh.
The armature 7, which is separate from the coil ll and permanent magnets 6, travels by itself, and its mass is as small as can be.
The arrangement shown in Figs. 2 through 5 is based on the basic principle illustrated in Fig. l.
The upper and lower first yokes l are housed in a top-opened box 12 of synthetic resin.
~ ~ ~9~39'7 In this case, the upper and lower first yokes 1 are seated on the bottom wall 13 of the box 12 in a state where they have been turned through 90 degrees from the Fig. 1 state, with its left-hand side lateral piece 2 and hori~ontal piece 4 contacted with the lateral wall 14 of the box.
The bobbin 15 for the coil 11 is constructed as follows.
The coil 11 is wound on a drum portion 16 having a hole.17 through which the armature 7 extends, said drum portion being integrally formed with lateral walls 18 and 19 between which the upper and lower second yokes 2, turned through 90 degrees from the Fig. 1 state, are fixed in position in parallel with the coil 11. The lateral walls 18 and 19 are formed with notches 20 to facilitate the installation of the second yokes 5. trhe right-hand side wall 19 is formed with grooves 21 to receive support edge terminals 22.
A cover 23 of synthetic resin is fitted over the top opening in the box 12. An insulation plate 24 is interposed between the cover 23 and the box 12.
The cover 23 is constructed as follows~
The cover 23 comprises a top wall 25, lateral walls 26 including low opposite late.ral walls, outer separators 27 connecting said top wall 25 and low lateral walls 26 and dividing them into sections/ inner separators 28 aligned with said outer separators 27~ and a downwardly I ~ 69~9 opened cavity 29 crossing said inner separators 28.
Outer terminals 30 are fixed in opposite outer chambers defined by said opposite lateral walls 26 of the cover 23 and the outer separators 27. The opposite terminals 30 at the right-hand extremity have integrally formed, vertical insert edges 31 adapted to be inserted in the support edge terminals 22 of the coil bobbin 15 to complete electric connection to the coil 11 when the cover 23 and box 12 are assembled together. The other terminals 30 are provided with fixed contacts 32 and positioned in opposite i.nner chambers 33 defined by the inner separators 28, A movable block 34 of synthetic resin adapted to move in parallel with the armature 7 is positioned in the downwardly opened cavity 29 in the cover 23.
The movable block 34 is formed with throughgoing transverse holes 35 at positions associated with the inner chambers 33 of said cover 23, where there are installed contact plates 36 provided with contacts 37 protruding to the opposite sides, and coil springs 38 for contact pressure. The contacts 37 in the movable block 34 and the con-tacts 32 in the cover 23 are opposed to each other in the inner chambers 33 and move into and out of engagement with each other as the movable block 34 is moved.
Connection between the movable block 34 and the armature 7 is effected by a reversing lever 33.
9~97 The reversins lever 39 receives a shaft 40 in the middle thereof/ said shaft 40 being supported in shaft-receiving holes 41 in the right-hand side wall 19 of the coil bobbin 15.
In the relationship between the reversing lever 39 and the armature 7, a shaft 42 is inserted in the lower end of the reversing lever, said shaft being fitted in a groove 44 in a connector 43 from above, and the right-hand end of the armature 7 is inserted in said connector 43 and cripmed to form an anti-slip-off portion 7b.
The left-hand end of the armature 7 is inserted in a left-hand side piece 8 and likewise crimped to form an anti-slip-off portion 7a. At the same time as the formation of this anti-slip-off portion, a nonmagnetic plate 45 is installed. These plates 45 are provided in order to cut off the opposite ends of the magnetic characteristic curve of the permanent magnets 6 so tha-t the latter may be used in the most stable region of the curve.
In the relationship between the reversing lever 39 and the movable block 34, the upper end 39a of said lever is engaged in a downwardly opened notch 46.
Therefore, if the armature 7, in Fig~ 2, horizontally travels to the right as indicated by the arrow Z, the reversing lever 39 is turned counterclockwise around the axis of the central shaft 40, causing the movable block 34 to travel horizontally to the left as indicated by the 1 ~ 6 ~
arrow V, which is opposite to the direction of travel of the armature, effecting engagement between the contacts 32 and 37 in the chambers. This engagement is maintained by the masnetic fluxes of the permanent magnets 6 on the basis of the principle illustrated in Fig. 1.
The armature 7 is resiliently urged in the direction of arrow ~ by an angle plate spring 47. The angle plate spring 47 has its apex 47a abutting against the left-hand side anti-slip~off portion 7a and its opposite ends 47b abutting against the left-hand side wall 14 of the box.
The movable block 34 is resiliently urged by a coil ~ spring 48 in a direction opposite to the direction of arrow V. The coil spring 48 is positioned between an indicator post 49 on the movable block 34 and the left-hand side wall 26 of the cover 23.
The spring pressures of these two springs ~7 and 48 act in opposite directions relative to -the armature 7 and movable block 34, facilitating separation of -the armature 7 as the latter is moved away Erom the state of being attracted by -the magnetic fluxes of the permanent magnets 6.
The indicator post 49 on the movable block 37 projects upwardly through a small hole 50 in the top wall 25 of the cover 23 and its position enables the internal action to be ascertained from outside.
A terminal cover 51 is fitted over the top wall 25 of the cover 23. Screwdriver-operating holes 53 ` 1 ~ 69~3(J7 corresponding in number to the opposite terminals 30 are present in the terminal cover 51.
For attaching purposes, hooked legs 54 are provided on opposite sides, aaapted to be inserted in small holes 55 in the top wall 25. The terminal cover 51 is provided on opposite sides thereof with dependent skirts 56 each positioned between adiacent outer separators 27 of the cover 23 to minimize the exposure of the terminals 30.
Fig. 6 will now be described.
This shows another embodiment of the invention, not departing from the basic principle illustrated in Fig. 1.
In this embodiment, the first and second yokes 1 and 5 and permanent magnets 6, which, in Figs. 2 through 5, have ~een shown as being in plate form and as being separately disposed, are in cylindrical form, and the number of parts is reduced. In this case, a cylindrical first yoke 57 is divided into a cylindrica1 body 57a and a cap 57b, which are united together by a thread 58.
With the cap 57b removed, a cylindrical second yoke 59 and a cylindrical permanent magnet 60 are recei~ed.
In Fig. 7, the area of the right-hand side contact pole surface 5b of the second yoke 5 is made greater than that of the left-hand side contact pole surface 5a.
This is realized by a lateral piece 6, providing an increased amount of magnetic flux to intensify thc magnetic flux of the permanent magnet 6; thus, thc , - I ~ 6 9 ~3 9 ~
arrangement provided the so-called unidirectîonal operation type (also referred to as the monostable type) wherein if the current through the coil 11 is cut off when the armature 7 has moved in the direction of arrow W, it is moved back in the direction of arrow Z by the magnetic flux of the strong permanent magnet 6.
Figs. 8 through 10 will now be described.
The arrangment shown therein is of the so-called tridirectional operation type ~also referred to as the triple stable type) wherein the horizontal bar 10 of the armature 7 is divided at the middle into two halves which are symmetrical, with a coil spring 62 interposed between said halves 7a and 7b to resiliently outwardly urge the halves away from each other.
Fig. 8 shows a first operation state wherein the magnetic fluxes of the permanent magnets 6 alone are in action, with halves 7a and 7b resiliently outwardly urged away from each other by the coil spring 62, so that in the air gaps a and d, the lateral pieces 2 and 3 of the first yokes 1 and the lateral pieces 8 and 9 of the armat~re 7 are attracted into contact with each other while, in the air gaps b and c, the second yokes 5 and the lateral pieces 8 and 9 of the ar~ature 7 are spaced apart.
Fig. ~ shows a second operation state wherein with a current flowing through the coil in such a direction as to cause the coil to produce a magnetomotive flux Yl, ~ ~989~
~he magnetomotive flux Yl of the coil 11 and the magnetic ~luxes X of the permanent magnets 6 are opposite in ~irection at the air gaps a and e and are equal in direction at the air gaps b and d. Therefore, as compared with Fiy.
~, the left-hand side half 7a alone is moved to the right .lS indieated by the arrow W against the force of the coil spring 62, so that the second yokes 5 and the left-hand side piece 8 on the left-hand side half 7a are contacted ~ith eaeh other, while the right-hand side piece 9 of the ~ight-hand side half 7b remains in eontact with the right hand side pieces 3-oE the first yokes 1. If eurrent through the eoil 11 is cut off, the state shown in Fig~ 8 is restored.
Fig. 10 shows a third operation state wherein with a current flowing through the coil 11 in such a direction as to cause the eoil to produce a magnetomotive flux Y2 ~hich is opposite in direction to the one shown in E~ig. 9, ~he magnetomotive flux Y2 of the coil 11 and the magnetic fluxes X of the permanent magnets 6 are equal in direct.ion ~t the air yaps a and c and opposite in direction at the ._ _ c~ir gaps b and d. Therefore, as compared with Fig. 8 ._ only the right-hand side half 7b is moved to the left _ as indicated by the arrow Z against the force of the _ coil spring 62, so that the left-hand side pieces 2 of _ the irst yokes 1 and the left-hand side piece 8 of the left-hand side half 7a continue to be contacted and the ___ ~ S-econd yokes 5 and the right-hand side half 7b are _ .
contacted. If the current through the coil 11 is cut of, 1 1 69~97 - 18 ~
the state shown in Fig. 8 is restored.
Fig. 11 shows a further development of the basic principle illustrated in Fig. 1.
While the armature 7 and movable block 34 in the embodiment shown in Figs. 2 through 5 are hori70ntal and parallel with each other, in this embodiment the armature 7 and movable block 34 are vertically disposed one above the other on the same line. The basic parts are shown in section taken in the same direction as in Fig. 2.
The angle plate spring 47 is seated on the bottom wall 13 of the box 12, and the left-hand side pieces 2 of the first yokes 1 are also seated thereon.
Downwardly opposed to the apex 47a of the angle plate spring 47 is the left-hand side anti-slip-off portion 7a of the armature 7. The right-hand side anti-ship-off portion 7b of the armature 7 is upwardly directed, and a connector 63 which is U-shaped is joined at its lower piece 64 to said right-hand side anti-slip-off portion 7b, with small holes 66 in the opposite lateralpieces 65 of said connector receiving a second angle plate spring 67 whose opposite ends 67b abut against the opposite support steps 68 in the cover 23. This angle spring 67 exerts the same action as the coil spring 48 used in the embodiment shown in Figs. 2 through 5 on the armature 7 and on the movable block 34 which is adapted to travel vertically and coaxially with the 1 3 ~9~(37 armature 7. Therefore, the lower angle plate spring 47 upwardly resiliently urges the armature 7 and movable block 34 while the upper angle plate spring 67 downwardly resiliently urges them at all times. The connection between the movable block 34 and the connector 63 is effected by inserting a shaft 71 in the shaft receiving holes 69 in the opposite lateral pieces 65 of the connector 63 and the shaft receiving hole 70 in the movable block 34. The box 12 and cover 23 are connected together by connecting screws 72.
The contacts 32, 37, therminal cover 51, etc., are the same as in the embodiment in Figs. 2 through 5.
Claims (6)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A polarized relay comprising a U-shaped first yoke consisting of right and left lateral pieces with their inner surfaces serving as contact pole surfaces and a horizontal piece interconnecting said right and left lateral pieces, a second yoke shorter than the distance between said right and left lateral pieces and opposed to said horizontal piece and having right and left outer lateral surfaces serving as contact pole surfaces, a permanent magnet disposed between the horizontal piece of the first yoke and the second yoke and having a vertically directed magnetization axis, said first and second yoke and said permanent magnet constituting one block, there being another similar block, these blocks being disposed one above the other, and an armature of the horizontal travel type adapted to come into and out of contact with the contact pole surfaces of said upper and lower first and second yokes, said armature comprising right and left lateral pieces having contact surfaces defined by their inner and outer lateral surfaces opposed to the contact surfaces of the right and left lateral pieces of the upper and lower first yokes and to the contact surfaces of the upper and lower second yokes, and a horizontal bar interconnecting said right and left lateral pieces and extending through a coil.
2. A polarized relay as set forth in Claim 1, wherein the first and second yokes and the permanent magnets are in cylindrical form and each first yoke includes two lateral pieces, one piece forming the bottom of the cylindrical body, the other piece being threadedly engaged with the edge of the opening in the cylindrical body.
3. A polarized relay as set forth in Claim 1 or 2, wherein one of the contact pole surfaces defined by the right and left outer lateral surfaces of one or both of the first and second yokes is larger than the other.
4. A polarized relay as set forth in Claim 1 or 2, wherein the horizontal bar of the armature is divided at the middle into two halves which are symmetrical, said halves being resiliently arged toward the right and left lateral pieces of the first yokes by a common spring pressure.
5. A polarized relay as set forth in Claim 1, wherein the relay comprises a box and a cover, said box housing a coil, first and second yokes, permanent magnets, and an armature which travels horizontally with respect to the bottom wall of the box, said cover housing a movable block of the horizontal travel type, a plurality of movable contact plates installed in said movable block, and wherein a reversing lever whose upper and lower ends are adapted to turn in mutually opposite directions around the axis of a central shaft is installed to extend over both the box and the cover, the upper end of said reversing lever being linked to said movable block, said armature and movable block being acted upon by respective springs in the same direction.
6. A polarized relay as set forth in Claim 1, wherein the relay comprises a box and a cover, said box housing a coil, first and second yokes, permanent magnets, and an armature adapted to move vertically with respect to the bottom wall of the box, said cover housing a movable block of the vertical travel type coaxial with the armature, a plurality of movable contact plates installed in the movable block, and fixed contact plates for engagement with said movable contact plates, said armature and movable block being connected together by a connector disposed therebetween, said armature and movable block being acted upon by respective springs in mutually opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000409568A CA1169897A (en) | 1982-08-17 | 1982-08-17 | Polarized relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000409568A CA1169897A (en) | 1982-08-17 | 1982-08-17 | Polarized relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1169897A true CA1169897A (en) | 1984-06-26 |
Family
ID=4123421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000409568A Expired CA1169897A (en) | 1982-08-17 | 1982-08-17 | Polarized relay |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1169897A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007095715A2 (en) * | 2006-02-24 | 2007-08-30 | TINOCO SOARES Jr. José Carlos | Electric switch |
-
1982
- 1982-08-17 CA CA000409568A patent/CA1169897A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007095715A2 (en) * | 2006-02-24 | 2007-08-30 | TINOCO SOARES Jr. José Carlos | Electric switch |
| WO2007095715A3 (en) * | 2006-02-24 | 2009-06-11 | Tinoco Soares Jr Jose Carlos | Electric switch |
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