Geometrical instruments
Patent
1982-09-28
1984-08-21
McGlynn, Joseph H.
Geometrical instruments
H01R 1339
Patent
active
044666829
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a terminal block for electric connection without stripping.
BACKGROUND OF THE INVENTION
It is well known to connect electric wires for low currents by means of metal connection parts which avoid the need for wire stripping by cutting the insulation themselves and ensuring contact with the conductor metal of the core of the wire.
In contrast, for higher currents, use has been made up till now of terminal blocks which require prior stripping of the insulation and which are more expensive and take longer to manufacture and to install.
The present invention provides a terminal block which allows electric power supply wires of usual diameter to be connected without being stripped and in a simple manner while allowing a series of lengths of conductors to be connected together properly due to a suitable shape whose great elasticity makes it possible to better master the contact pressure on the conductors.
SUMMARY OF THE INVENTION
In accordance with a characteristic of the invention, the terminal block has a groove which contains firstly at least one fixed and conductive connection part open towards the inside and set in the direction of the axis of the groove by a slot for stripping and locking the core of a conductor wire, secondly at least one sliding pusher which can be manipulated from the outside of the terminal block and can move in translation along the longitudinal axis of the groove between a position of partial interpenetration within the part bearing the blocking and stripping slot and a position which allows the insertion of a suitable wire between itself and the opening of the slot, so as to allow the core to be inserted by force in the slot when the pusher is returned to the interpenetration position under the action of an outside manipulating force.
Other features and advantages of the invention will be defined during the description and in relation with the following figures.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 and 2 are perspective views as partial cross-sections of the same terminal block in accordance with the invention, in two states;
FIG. 3 is a partial cross-section seen from the side of the terminal block illustrated in FIGS. 1 and 2;
FIG. 4 and FIG. 5 are partial side cross-sections along line IV--IV and along line V--V of the terminal block illustrated in FIG. 3;
FIGS. 6 and 7 are perspective views as partial cross-sections of a terminal block in accordance with a variant of the invention; and
FIG. 8 is a top plan view of a connection part.
DESCRIPTION OF PREFERRED EMBODIMENTS
The terminal block illustrated in FIG. 1 is conventionally composed of a housing 1 whose outside shape, outlined here, is shown more clearly in FIGS. 3, 4 and 5.
Said housing 1 has a conventional, roughly parallelepipedical, rectangular shape with two large side faces 10,10' (FIG. 4) and four walls 11, 11' 12, 12'. The wall 11, forms the bottom of the block 1 and supports fixing means 110 (FIG. 3). The wall 11' forms the top of the block 1 and is normally accessible and visible when the block 1 is grouped together with other blocks on a support.
The walls 12 and 12' (FIG. 3) form the ends of the block and may also be accessible and visible when the block 1 is grouped together with other blocks as opposed to the side faces 10 and 10' which are neither accessible nor visible.
In accordance with the invention, the internal volume of the terminal block 1 is in the form of a groove such as the groove 13 which, in the example illustrated opens at the top 11' of the block 1 and is disposed longitudinally at the bottom of the block.
However, said configuration is not essential and it could be envisaged to provide such grooves which open out in one, two or three of the walls 11', 12, 12' of the housing or into any other walls forming any angle with said walls 11, 11', 12, 12'.
The groove 13 illustrated in FIG. 1 is arranged so as to allow at least one pusher 2 to slide longitudinally.
This can be done using any conventional means and in particular by
REFERENCES:
patent: 4349239 (1982-09-01), Roberts et al.
patent: 4379605 (1983-04-01), Hoffman
patent: 4405193 (1983-09-01), Weidler
Borne Andre
Fermond Gilbert
Heng Jean P.
Jusseau Marcel
CGEE Alsthom
McGlynn Joseph H.
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