Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – With housing or support means
Reexamination Certificate
1999-11-23
2001-10-02
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
With housing or support means
C335S132000
Reexamination Certificate
active
06297718
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an electromagnetic switching device having a multipart housing, in which the coil enclosing the magnet core is mounted in one of the housing parts.
RELATED TECHNOLOGY
Electromagnetic switching devices having multipart housings with a magnet core and bobbin, armature, movable contacts and stationary contacts require coil terminals, i.e. terminals for the control voltage of the device these being outer terminals connecting the device to the equipment installed at the locale. Normally, the coil terminals of the bobbin are permanently attached to the bobbin and therefore are accessible by a particular the device, i.e., these coil terminals can be mounted at different locations on a device for different devices or devices of different sizes. For a switching device according to German Patent No. 43 22 648 C1, two specially designed slots are assigned on the device housing to each of the two winding ends of a four-leg coil. The electrical connection on the four-leg coil is implemented via terminals that are shape coded to match the slots and can be inserted in these slots.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an electromagnetic switching device with improved to outer terminals, in particular to make the coil terminals more universal, so that these outer terminals are available even for devices of different sizes in the same manner, thus allowing greater flexibility in that the outer terminals have the same design, yet can be mounted at different points of the electromagnetic switching device. In this manner, the electromagnetic switching device, in addition to having different sizes, can be better adapted to different on-site conditions.
The present invention provides an electromagnetic switching device having a housing part accommodating the magnet core and the coil in that identical connecting modules are provided for each outer terminal of the device and they can be mounted on the top of the housing part accommodating the magnet core in the area of the four corners of the housing part, and a blank module having the same external shape is provided and can be mounted on the corner of the housing part that is not occupied by a connecting module. According to the present invention, the outer terminals of the electromagnetic switching device are placed in connecting modules, away from the bobbin. In this case only a plug and socket connection is required via a cable between the bobbins and the connecting module. The connecting modules are all identical to one another, so that the desired number of connecting modules, normally three connecting modules, can be mounted on the housing part. Although a fourth available terminal location of the device, i.e., the housing part accommodating the magnet core, does not have to be occupied by a connecting module, for aesthetic reasons and for “closedness,” a blank module is provided, which evens out the exterior shape of the connecting module and which then occupies the free spot. The blank module can also be replaced with a connecting module at a later time, for example, if another outer terminal, for example, a bus terminal, is to be implemented.
According to an examplary embodiment, of the prevent invention the connecting module or blank module according to the present invention has an generally cuboidal shape and, on its narrow lower side, a T-shaped plug-in ridge for inserting in a groove on the top of the housing part, which accommodates the magnet core and the bobbin. The connecting modules mounted on the top of the housing part in the area of the side wall extend the housing part upward and also form a guide for the additional armature housing of the electromagnetic switching device that can be mounted thereon, which is usually the armature housing that accommodates the armature.
In order to facilitate the insertion of the module in the grooves of the housing part, the T-shaped plug-in ridge ends at a distance from both vertical narrow sides of the connecting module or the blank module.
The upper narrow side of the connecting module is stepped with two shoulders and slopes outward to accommodate the terminal clamps. This makes it possible to connect a cable having a plug-in connector into the inside of the housing part, i.e., to the coil, for example, on the longer vertical side of the connecting module, formed by the stepping of the upper narrow side. This connecting side of the connecting module is designed, in principle, as a guide channel and is delimited by the side walls of the connecting module. The blank module also has a similar connecting side with a guide channel.
In order to allow the connecting module and the blank module to be installed and securely fastened in the housing part, it is proposed that the housing part accommodating the connecting module and the blank module be inserted in the wall on the top of two parallel side walls from above, and the ridges that widen the wall be installed with the grooves parallel to the side walls in which the modules can be installed. In order to facilitate the insertion of the modules, the grooves of one side wall are open at their ends facing one another for insertion of the T-shaped plug-in ridge of the modules. Thus the modules can be plugged onto the housing part and then can be made to slide outward toward the corners, and the modules installed on one side can be fastened using the armature housing, preventing them from being pulled out after the two housing parts of the device have been joined.
The arrangement according to the present invention of the connecting modules for the outer terminals of the electromagnetic device in the area of the magnet coil on the outer corners of the housing allows easy access for producing a connection at a later time, as well as multiple applications. The terminals can be manufactured so that they are easily accessible at all times even under conditions of limited space due to the fact that the connecting modules are located at the corners of the device.
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patent: 3518391 (1970-06-01), Hipple
patent: 4100517 (1978-07-01), Rodolfl
patent: 4595812 (1986-06-01), Tamaru et al.
patent: 4691978 (1987-09-01), Lemmer
patent: 4713498 (1987-12-01), Lugwig et al.
patent: 5483213 (1996-01-01), Mueller et al.
patent: 5559678 (1996-09-01), Fukuda et al.
patent: 5687063 (1997-11-01), Chabert
patent: 5747734 (1998-05-01), Kozlowski et al.
Joergens Stefan
Lang Volker
Scholz Rudolf
Thar Ralf
Donovan Lincoln
Kenyon & Kenyon
Moeller GmbH
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