Electrical connectors – With selectable circuit – e.g. – plug board – Coupling part including repositionable contact
Patent
1987-10-09
1989-08-15
Pirlot, David
Electrical connectors
With selectable circuit, e.g., plug board
Coupling part including repositionable contact
439 53, 439171, 439652, H01R 2900
Patent
active
048569992
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an electric connection element shaped as an adapter, in order to be able to use therewith, for example, electric small appliances without grounding contact of the kind of an adapter plug on foreign travel, where the wall plugs of the appliances, adapted to the respective home country, can be used in wall outlets present in various other countries and continents.
So-called travel plug sets are known for this purpose. These travel plug sets comprise several adapter plugs, each of which is individually suitable only for the adaptation of the home-country plug system to one defined other system. Since it is frequently not known to the user which particular plug system is employed in another country and since the user therefore always has to carry with him several separate adapter plugs, which are easily lost, this kind of construction has not proven to meet the requirements. In addition, it has been attempted in the past to provide one and the same adapter plug, by means of a shifting mechanism and by screwing out of individual plug pins, for several different plug systems. However, this construction is quite complicated and is hardly properly and safely operable by a non-skilled person, even with the aid of operating instructions.
In view of the above, it is an object of the invention to develop an electric adapter element by way of which the plug systems existing around the world can be adapted in a practical and safe way for receiving power from a certain type of wall plug. In addition, it is desired that a compact article of common use be provided which does not allow any operator intervention in its contact system and which is completely contact-voltage proof during use.
This object is achieved in an electric connection piece or adapter according to the preamble of patent claim 1 and by the features presented in the characterizing portion of claim 1. The adapter according to the invention represents in such a construction advantageously also a handy accessory, which can be plugged, depending on the type of plug system available on the spot, with the corresponding plug pin arrangement into the fixedly installed wall outlets or, possibly, into a flying or overhung coupling in order to be able to use the plug pin arrangement, after the adjustment of the marked rotary body in direction of the receiver part, in the one and the same home wall outlets for the connection of the electric appliance carried along. In addition, the plug system selector contained in the adapter exhibits sometimes the useful switch-on and switch-off effect in that the respectively unused, exposed plug pin arrangements are absolutely free of voltage toward the outside.
In the same way, the plug body can be formed for a more limited application range of the adapter. Only three or four plug pin arrangements can be formed in its geometrical form with the same advantages as trigonal prismatic or tetragonal prismatic shape. Respectively, the adjustable wall outlets provided in the cover face and/or base face can be constructed, according to their system, uniformly or also differently, without thereby extending beyond the protection range of the invention.
The feature of claim 2 is directed toward an advantageous formation of the movable connection and contact parts of the adapter. Consequently, the two female contact elements or socket elements comprise in the same manner a longitudinally extended U-shaped folded brass plate strip, where the two socket elements are inserted, in each case, below the existing plug-in openings and are supported with the aid of tip-stretched or formed-on web protrusions at the rotary body. In this context, the parallel running longitudinal arms or branches of these socket elements, connected to each other via the web-like reduced cross arm or branch, are arched or curved with respect to each other and, in each case, provided with two oppositely disposed cross slots. In this manner, three plug-in regions, independent of each other, are formed which allow, for example, to accept or contain
REFERENCES:
patent: 2423512 (1947-07-01), Mantilla et al.
patent: 3609649 (1971-09-01), Rigolini
patent: 4196409 (1980-04-01), Julba
Heinrich Kopp GmbH & Co. KG
Kasper Horst M.
Pirlot David
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