Device with four-legged coil

Details Device with four-legged coil Device with four-legged coil

1996-01-05

1998-03-03

Berhane, Adolf

Inductor devices

Winding with terminals, taps, or coil conductor end...

336 90, 336137, H01F 2704

Patent

active

057240183

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a device, preferably a switching device, having a four-legged coil.
Such a device is disclosed, for example, in DE-A 3,017,561. This is an electromagnetic switching device, for example a contactor having adjacent connecting planes and having a coil former which has attachments, located in the rear connecting plane, for producing a diagonal connection. The coil former is provided with two projections, which point in the direction of the adjacent connecting planes, for the accommodation of connecting terminals which can be plugged in. Their connecting screws lie in the connecting plane which is adjacent to the rear connecting plane.


SUMMARY OF THE INVENTION

The present invention is designed to optimize the coil connection options in a simple manner, with respect to the number of connecting planes. It is thus possible, if the spatial conditions in the region of the rear connecting plane are inadequate, to use the two additional connection options, lying in the region of the adjacent front plane, to produce a vertical connection for the coils instead of the diagonal connections located here. The coil former of the present invention makes it possible to easily convert the switching apparatus in a way that facilitates insertion and withdrawal operations without having to change to a new coil former. The present invention also has features that ensure that connections are not accidentally interchanged, which could lead to short-circuits.
The present invention is a switching device comprising a four-legged coil. A first end of the winding is connected to one or more first plug-in locations. A second end of the winding is connected to one or more second plug-in locations. The first plug-in locations are shaped to accept a first shape-coded connecting terminal that is connected to a voltage supply. The second plug-in locations are shaped differently than the first plug-in locations to accept a second connecting terminal that is shape-coded differently from the first connecting terminals. The second connecting terminals are also connected to a voltage supply. The plug-in locations and connecting terminals are configured such that a first plug-in location will not accept a second shape-coded connecting terminal, and a second plug-in location will not accept a first shape-coded connecting terminal. This is important because it prevents accidentally connecting the wrong terminal to the wrong plug-in location, possibly leading to a short circuit.
In a preferred embodiment, first plug-in locations and second plug-in locations are provided on a first side of the switching device as well as on a second side. In another preferred embodiment, first plug-in locations and second plug-in locations are provided on the top of the switching device as well as on the bottom. The plug-in locations on the top and bottom of the device can also be provided in addition to plug-in locations on the sides. The switching device can also accept a circuit module that has been configured with appropriate connecting terminals that are properly shape-coded and positioned to fit into the plug-in locations. This configuration ensures that, for example, the circuit module will be connected to the switching device with the proper polarity.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a device having a four-legged coil and plug-in connecting terminals,
FIGS. 2, 3 show a device having a four-legged coil and connecting terminals plugged in on one side,
FIG. 4 shows a device having connecting terminals plugged in on one side and having a circuit module which is additionally connected,
FIGS. 5, 6 show embodiments of shape-coded connecting terminals.


DETAILED DESCRIPTION

FIG. 1 illustrates by way of indication in a sectional illustration a housing 6 of a device, for example a switching device, having a four-legged coil 1 which has a first winding end 2 and a second winding end 3. There are electrical supply leads from the first winding end 2 to two first plug-in locations 4, and there are elec

REFERENCES:
patent: 5448216 (1995-09-01), Kuze et al.

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