US1832657A

US1832657A - Double contact relay

Info

Publication number: US1832657A
Application number: US194828A
Authority: US
Inventors: Rassow Horst
Original assignee: Siemens AG
Current assignee: Siemens and Halske AG; Siemens AG
Priority date: 1926-09-15
Filing date: 1927-05-27
Publication date: 1931-11-17
Anticipated expiration: 1948-11-17
Also published as: DE499058C

Description

Nov. 17, 1931. H. RASSOW DOUBLE CONTACT RELAY Filed May 27, 1927 Fig. 4

" HETTTRassnw "Ian application of the relay as a rectifier.

Patented Nov. 17, 1931 UNITED STA TESM HORST RASSOW, OF BERLIN, GERMANY, ASSIGNOR TO SIEMEIVQ & HALSKE AKTIEN- GESELLSCHAFT, WERNERWEBK, OF SIEMENSST ADT, NEAR BERLIN, GERMANY DOUBLE CONTACT RELAY Application filed May 27, 1927, Serial No. 194,828, and in Germany September 15, 1926. I

This invention relates in general to polarized relays but more in particular to double contact polarized relays, and the object is to make such relays more sensitive and eflicient in operation.

Double contact relays are known which have had the fixed contacts located either on both sides of a point of rotation or both of them have been located on one side'of the rotatably mounted armature. In every case at least one of the two fixed contacts required spring supports in order that both contact pieces of the armature should make equally good contact. In that case it is impossible for both the fixed contacts to close their circuits quite simultaneously. Furthermore bouncing often occurs owing to the contact pressure not being quite uniform.

The present invention avoids these disadvantages, and at the same time has the advantage that the movable parts have little weight and that all friction at the bearings is done away with, this being achieved by so mounting the armature and so associating the pole shoes with it, that the armature moves parallel to itselfand-therefore at right angles to its longitudinal axis. I

Arrangements of this kind have been known for operating loud speaking telephones, which have the armature rigidly coupled to the telephone diaphragm and mounted on an elastic metal strip located in its longitudinal axis. In that arrangement the armature is surrounded by the telephone coil and its ends lie between the poles of two permanent magnets placed in dissimilar directions. This arrangement could not directly serve as a model, because the two classes of apparatus have different requirements and the very minute moving force of the armature in the known device would be quite insufli cient to operate the contacts. 1

The Figures 1 to 3 inclusive, show by wa of example, one method of constructin the novel double contact relay, while Fig. 4 s ows f Figure 1 isi 'a section on the line II-II in Figure 2 Figure"2 is a section on II in 1 Figure 1; and Figure 3 is a side elevation.

Two permanent magnets 1 and 2 have their similar poles placed opposite one another and connected by means of soft iron pole'shoes pole shown lies on the front side of the coil 6 opposite the bar shaped armature 5, and the other extension lies on the rear side of the coil but on the opposite side of the armature 5 from the first extension. The armatu l'p 5, it will be noted, is surrounded by the co 6.

According to the polarity momentarily impressed on the armature 5 by the alternating current coil 6, the armature 5 is'drawn parallel to itself towards the one or other pair of pole extension pieces 3", 4 or 3", 4: In known manner the pole shoe extension pieces can have their position adjustable with respect to one another.

The cylindrical space 7 in the middle of the coil 6 is so large that the armature 5 is quite free to move therein. Slots in the ends of the armature contain insulating'plates 8 and 9, which have armature contacts 10 on both sides and are suspended from metal bandsll, 12. The upper ends of the metal bands are fixed into metal blocks 13, to which thewires for conveying current to the contacts are connected. The blocks 13 are mounted on a bridge 14, made of insulating material. The armature contact pieces 10 are connected to the bands 11 and 12 by means of the

insulating plates

8 and 9 which act as special strengthening pieces in such a manner as to prevent the armature tipping between the

fixed contacts

15 and 16. For this purpose the upper end of the insulating piece 9 is widened. In addition on the other side a special .strengthening piece 17 is fastened to the lower part of the band 11. On the other side the band 11 is mounted .on the insulating plate 8 so as to be rotatable about the axis formed by the contact 10. The object of this is to enable the supporting band 11 to be. turned over in the direction of the axis of the armature after the upper fastening 13 of the band has been loosened, thereby rendering it ill possible for the armature to be drawn out of the coil 6 at *the other side.

Figure 4 shows a circuit arrangement, which permits the novel double contact relay to be used as a rectifier. An alternating current source 18 is connected to a transformer 19, the secondary coil of which is connected to the

fixed contacts

15, 16' and 15', 16 of the armature 5. The apparatus consuming direct current, which in the example is shown to be a battery 21 that is to be charged, is connected over a regulating resistance 20 and over the supporting bands 11, 12 of the armature to the latter. The energizing coil 6 surrounding the armature is connected to the alternating current source 18 either in front of the transformer 19 or over the transformer 19, a condenser 22 being preferably inserted in the circuit for the purpose of adjusting the phase. 1

What is claimed is:

1. In a polarized relay, a pair of permanent horse shoe magnets, a coil mounted be tween said magnets, an armature extending through the center of said coil and controlled thereby, a pair of pole shoes attached to said magnets and disposed on each side of said coil, each end of said armature disposed between said pole shoes, and, a pair of elastic electrical conducting bands, insulated from and supported by said pole shoes, and attached to each end of said armature for supporting the same.

2. In a polarized relay, a pair of perma nent horse shoe magnets, a coil mounted between said magnets, an armature extending through the center of said coil and controlled thereby, a pair of pole shoes attached to said magnets and disposed on each side of said coil, each end of said armature disposed between said pole shoes, and, a pair of elastic electrical conducting bands, insulated from and supported by said pole shoes, and attached to each end of said armature, said elastic conducting bands attached to each end of said armature by means of fiat insulating pieces and strengthening pieces on said bands.

3. In a polarized relay, 2. pair of permanent horse shoe magnets, a coil mounted between said magnets, an armature extendin through the center of said coil and controlled thereby, a pair of pole shoes attached to said magnets anddisposed on each side of said coil, each end of said armature disposed between said pole shoes and a pair of elastic electrical conducting bands, insulated from and supported by said pole shoes, and attached to each end of said armature, said elastic conducting bands attached to each end of sa1d armature by means of flat insulating pieces and strengthening pieces on said bands, one of said bands being rotatably attached to sa1d armature to permit withdrawal of the armature from said coil.

4. Ina relay, an armature passing through