DE2142340A1 - Electric switch - Google Patents

Description

2U2340

Applicant; Stuttgart, August 23, 1971

Communications Patents Ltd. P2399 Carlton House
Lower Regent Street
London, SW1, England

Electric switch

The invention is based on an electrical switch with several magnetically switchable tongue contacts (Reed contacts). Such reed contacts are known. These are two ferromagnetic contacts Tongues whose free ends are opposite one another. The tongues are in a tube, preferably made of glass, hermetically sealed; An externally acting magnetic field can make the contacts to the free Tongue lines are brought into contact with one another or separated from one another again.

209810/1281. ___

ORIGINAL INSPECTED

2H2340

The object of the present invention is to provide a switch to train with reed contacts so that at least one switching contact selectively in one or more of its possible positions can be made ineffective.

The object is achieved according to the invention in that each of the reed contacts in a channel made of conductive Material is arranged with two magnetically conductive walls provided on both sides of the reed contact, which simultaneously form an electrostatic and an electromagnetic shield for the reed contact, and that at least one of the seed contacts is assigned a control device through which the magnetic actuation of the reed contact can be prevented. The invention therefore makes it possible to use one or more of the contacts to make the switch ineffective or not switchable. The advantage here is that this results in the effect the other switching contacts are not influenced or otherwise is impaired.

In one embodiment of the invention, the control device comprises a magnetically conductive part assigned to a reed contact, which is used for the reed contact forms a magnetic shield, which prevents this reed contact from being switched by a magnet.

In a further embodiment of the invention, v / eist the control device has an additional auxiliary reed contact connected in series with the reed contact, which can be switched by a magnetic element assigned to it. A permanent magnet is preferred

2 0 9 810/1281 BAD ORIGINAL

Magnet used that is removable on or near the mower of the auxiliary reed contact is provided.

Further details and embodiments of the invention can be found in the following description, in which the invention is illustrated in the drawing Embodiments described and explained in more detail will. The features that can be derived from the description and the drawing can be used in other embodiments of the invention can be used individually or collectively in any combination. * It shows:

Fig. 1 shows a cross section through an inventive Switch and

Fig. 2 is a schematic circuit diagram of another embodiment of an electrical according to the invention Switch.

In the switch shown in Fig. 1, a plurality of magnetically switchable contacts, so-called Reed contacts i arranged in assigned channels of a conductive material, the magnetically conductive Walls 2 each have a reed contact on both sides. A rope made of magnetically non-permeable, electrically conductive material is assigned in each case a copper layer 3 which is attached to one side of a plate 4 · made of insulating material. Appropriately are the copper layer 3 and the plate 4 components of a so-called printed circuit board. The magnetically permeable Walls 2 are attached to the insulating plate 4 by sections 5 which extend through corresponding openings

- 2 0 9 810/1281

_ 4 -

in the copper layer 5 uncL of the PlCa ^- Ue 4 stretch through and ground them in a suitable manner so that they can no longer be pulled out afterwards. Each magnetically permeable wall 2 ″ consists of a pair of sheets of magnetizable material; each of the walls 2 is assigned to two channels with reed contacts 1 that are adjacent to one another

t.

The reed contacts 1 can be switched by means of a permanent magnet which is attached to a movable arm 7, which is used to bring the permanent magnet 6 over that reed contact that switched at a certain time shall be.

In the practical embodiment, the reed contacts Λ and the magnetically permeable walls 2 ^{are arranged like spokes around a g r} - lone center and the arm 7 is pivotable about an axis which extends through the common center, so that the arm. 7 can be rotated away via the reed contacts 1 «,

egg

A control device is assigned to one of the reed contacts, to make the magnetic actuation of this contact ineffective. The control device includes a Bridge 8 magnetically permeable material which can be detached and moved in the channel defined by two walls 2 and which forms a magnetic shield that prevents the reed contact from being actuated by the permanent magnet 6. In practice, can a bridge 8 or more bridges 8 manually one or can be assigned to several reed contacts · These reed contacts together form a program selection switch, the

BATH ORIGINAL

209810/128 1

2U2340

a "specific subscriber of a wireless radio system is assigned, it can be ensured that the Participants' did not determine the existing programs receives. Should the participant at a certain time can receive one of these programs, the bridge 8 is simply removed from the channel, in which the reed contact assigned to this program is located, so that its normal operation is restored.

In the arrangement of Fig. 2, reed contacts 10 of the type shown in Fig. 1 are arranged so that they through a movable magnet, corresponding to the permanent magnet 6 of FIG. 1, are switchable. Switching one of the Reed contacts 10 are used to produce a current path between one of the input terminals 11 and the output terminals 12, from which a subscriber of a wire radio system receives selected program signals. Resistances 13 serve as decoupling impedances to avoid undesirable effects on other participants in the system for the Suppress the event of a defect in the participant connected to the output terminals 12. To each the reed contact 10 is an auxiliary reed contact 14 electrical connected in series, the contacts of which are normally closed. Should be for the participant who owns his Program signals from the output terminals 12 receives one or more of the programs that are fed to the associated input terminals 11 cannot be received, see above is on or near the assigned auxiliary reed contact 14 a magnet 15 placed, through its magnetic Field the hiifs reed contact is actuated,

BATH ORIGINAL 209810/1281

2U2340

so that he opens his contact. Eg it can be seen that when reed contacts 10 of the üfeilnehsiera that assigned to this program when selected the! participants are closed, thereby defying no program signals reach the output terminals 12 when the auxiliary reed contacts 14 are open «, The magnet 15 is removable on or in the ITäJici des relevant auxiliary reed contact 14 arranged, for example fastened by means of a clamp which is plugged onto the body of an auxiliary reed contact 14 “On the other hand, it is very easy to prevent a participant from receiving a previously blocked Program by simply using the Ilagnet 15 deducted from the associated auxiliary reed contact 14 will.

It goes without saying that the auxiliary reed contacts 14 can also be actuated by electromagnets and that in in such a case, the control of the actuation can be carried out automatically and / or remotely.

BAD ORIQiNAL 209810/1281

Claims (5)

2H2340 - 7 - Claims ./Electric switch with several magnetically switchable Contacts (Reed-Koiitakiien), thereby germinated, that each of the reed contacts (i) in one Channel made of conductive Umaterial is arranged with two magnetically conductive on "both sides of the Reed contact provided V / ands (2), which at the same time an electrostatic and an electromagnetic Shielding of the reed contact "form, and that at least one of the reed contacts has a control device is assigned, through which the magnetic actuation of the reed contact can be prevented. 2. Switch according to claim 1, characterized in that the control device is a magnetically conductive, a reed contact (i) associated part (8) comprises, das.für.den reed contact a magnetic Shielding is formed by switching this reed contact through a lagnet. (6) is prevented. 5 Switch according to Claim 2, characterized in that that the "eil" is a bridge (8) made of nagneöisch conductive Llaterial includes that in which by the two V / ands (2) limited channel is slidably attached. 4. Switch according to claim 1, characterized in that that the control device has an additional auxiliary reed contact connected in series with the reed contact do) (IA-) aufv / eist, which is assigned by a Magnetic link (15) is switchable. 2098 10/128 1 2U2340 -s- 5. Switch according to claim. 4 ·, characterized that a permanent magnet is used as a Macnet member (15) which is removably provided on or in the vicinity of the auxiliary reed contact (14-). 6e switch according to claim 4, characterized in that that an electromagnet is used as the lag member (15) is. 209810/1281 ^ _{0 0BIQINAL}