Modular multiple-circuit electrical system

1. A multiple circuit duplex module comprising:

a chassis having an electrical chassis receptacle providing a plurality of connection points for the selection of power from two or more different circuits;

a duplex element having at least one electrical duplex receptacle thereon to deliver power from one of said two or more different circuits to an external device in electrical contact with said at least one duplex receptacle; and

first conductor means for electrically connecting said at least one duplex receptacle to selected connection points in said chassis receptacle, said duplex element including a housing having first and second ends, said first conductor means extending into both of said ends, said first and second ends being alternately releasably connectable to said chassis receptacle for placing said first conductor means therein in electrical contact with said selected connection points in said chassis receptacle;

said duplex element being connectable to said chassis in different orientations, the orientation of said duplex element determining which one of said two or more different circuits is electrically connected to said at least one duplex receptacle, said first conductor means comprising first and second electrical conductors for power and optionally a third electrical conductor for a ground connection, said first and second conductors each having a first end located within said first end of said housing and a second end located within said second end of said housing, each one of said first and second ends of said first and second conductors being differentially aligned for connection to respective different ones of said connection points in said chassis receptacle depending upon the orientation of said duplex element;

wherein said chassis additionally includes a sliding plate member movably connected thereto for movement towards and away from said chassis receptacle.

2. The duplex module of claim 1 wherein said duplex element detachably connects to said sliding plate member to hold said duplex member in one of its different orientations, whereby moving said plate and said duplex element connected thereto towards said chassis receptacle connects one of said first or said second ends of said housing, depending upon the orientation thereof, to said chassis receptacle for electrical connection between said first conductor means and selected ones of said connection points.

3. The duplex module of claim 1 wherein the end of said housing not connected to said chassis receptacle is closed with a nonconductive cover.

4. The duplex module of claim 3 wherein said non-conductive cover is connected to said sliding plate member for movement therewith.

5. The duplex module of claim 1 wherein said housing of said duplex element has a first surface and a second oppositely facing surface with at least one of said duplex receptacles in each.

6. The duplex module of claim 5 wherein in one orientation of said duplex element, said at least one said duplex receptacle in said first surface is available for connection to the external device when one or the other of said first or second ends of said housing is connected to said chassis receptacle, and in another orientation of said duplex element, said at least one receptacle in said second surface is available for connection to the external device when one or the other of said first or second ends of said housing is connected to said chassis receptacle, providing for the selection of four different circuits for supplying power to the external device.

7. A multiple circuit duplex module comprising:

a chassis having an electrical chassis receptacle providing a plurality of connection points for the selection of power from two or more different circuits;

a duplex element having at least one electrical duplex receptacle thereon to deliver power from one of said two or more different circuits to an external device in electrical contact with said at least one duplex receptacle; and

first conductor means for electrically connecting said at least one duplex receptacle to selected connection points in said chassis receptacle, said duplex element including a housing having first and second ends, said first conductor means extending into both of said ends, said first and second ends being alternately releasably connectable to said chassis receptacle for placing said first conductor means therein in electrical contact with said selected connection points in said chassis receptacle;

said duplex element being connectable to said chassis in different orientations, the orientation of said duplex element determining which one of said two or more different circuits is electrically connected to said at least one duplex receptacle, said first conductor means comprising first and second electrical conductors for power and optionally a third electrical conductor for a around connection, said first and second conductors each having a first end located within said first end of said housing and a second end located within said second end of said housing, each one of said first and second ends of said first and second conductors being differentially aligned for connection to respective different ones of said connection points in said chassis receptacle depending upon the orientation of said duplex element;

wherein said chassis member has first and second ends and second conductor means extending therebetween, said second conductor means comprising a pre-determined number of electrical conductors, respective ones of said electrical conductors being electrically connected to respective ones of said connection points in said chassis receptacle.

8. The duplex module of claim 7 wherein said chassis additionally includes a first cap member releasibly connectable to said first end of said chassis, and a second cap member releasibly connectable to said second end thereof.

9. The duplex module of claim 8 wherein said first cap member is an electrical connector for connecting said chassis and said second conductor means therein to a source of electrical power for said two or more different circuits.

10. The duplex module of claim 9 wherein said second cap member is an electrical connector for releasably connecting said chassis and said second conductor means therein to a second chassis in a series connection.

11. The duplex module of claim 10 wherein one of said first or second cap members provides a male electrical connection and the other of said first or second cap members provides a female electrical connection.

12. The duplex module of claim 11 wherein said first and second cap members are respectively connectable to said first and second ends of said chassis in one predetermined orientation only for maintaining series continuity in said two or more different circuits between said chassis and said duplex element and between said chassis and any other said chassis connected thereto.

13. The duplex module of claim 7 wherein said chassis additionally includes a sliding plate member movably connected thereto for movement towards and away from said chassis receptacle.

14. The duplex module of claim 13 wherein said duplex element detachably connects to said sliding plate member to hold said duplex member in one of its different orientations, whereby moving said plate and said duplex element connected thereto towards said chassis receptacle connects one of said first or said second ends of said housing, depending upon the orientation thereof, to said chassis receptacle for electrical connection between said first conductor means and selected ones of said connection points.

15. The duplex module of claim 13 wherein the end of said housing not connected to said chassis receptacle is closed with a non-conductive cover.

16. The duplex module of claim 15 wherein said non-conductive cover is connected to said sliding plate member for movement therewith.

17. The duplex module of claim 7 wherein said housing of said duplex element has a first surface and a second oppositely facing surface with at least one of said duplex receptacles in each.

18. The duplex module of claim 17 wherein in one orientation of said duplex element, said at least one said duplex receptacle in said first surface is available for connection to the external device when one or the other of said first or second ends of said housing is connected to said chassis receptacle, and in another orientation of said duplex element, said at least one receptacle in said second surface is available for connection to the external device when one or the other of said first or second ends of said housing is connected to said chassis receptacle, providing for the selection of four different circuits for supplying power to the external device.

19. A method for the selection of power from two or more different circuits, said method comprising the steps of:

providing a chassis with an electrical chassis receptacle having a plurality of connection points therein for the selection of power from said two or more different circuits that are electrically connected to said chassis for the supply of said power thereto;

providing a duplex element having at least one electrical duplex receptacle thereon for the delivery of power from one of said two or more electrical circuits to an external device in electrical contact with said at least one receptacle, said duplex element additionally having first conductor means therein for electrical connection to selected connection points in said chassis receptacle said duplex element being connectable to said chassis in different orientations;

choosing which one of said two or more different circuits is electrically connected to said at least one duplex receptacle by choosing the orientation in which said duplex element is connected to said chassis; and

providing said chassis with a elate member for supporting said duplex receptacle in said chosen orientation, said plate member being slidably connected to said chassis for alternately moving said duplex receptacle into electrical contact with said chassis receptacle and to move said duplex receptacle away from said chassis receptacle to break said electrical contact.

20. The method of claim 19 wherein said duplex element includes a housing having first and second ends, said first conductor means extending into both of said ends, said first and second ends being alternately releasably connectable to said chassis receptacle for placing said first conductor means therein in electrical contact with said selected connection points in said chassis receptacle.

21. The method of claim 20 wherein said first conductor means comprise first and second electrical conductors for power and optionally a third electrical conductor for a ground connection, said first and second conductors each having a first end located within said first end of said housing and a second end located within said second end of said housing, each one of said first and second ends of said first and second conductors being differentially aligned for connection to respective different ones of said connection points in said chassis receptacle depending upon the orientation of said duplex element.

22. The method of claim 21 wherein said duplex element detachably connects to said sliding plate member to hold said duplex member in one of its different orientations, whereby moving said plate and said duplex element connected thereto towards said chassis receptacle connects one of said first or said second ends of said housing, depending upon the orientation thereof, to said chassis receptacle for electrical connection between said first conductor means and selected ones of said connection points.

23. The method of claim 22 wherein the end of said housing not connected to said chassis is closed with a non-conductive cover.

24. The method of claim 23 wherein said non-conductive cover is connected to said plate member for movement therewith.

25. A method for the selection of power from two or more different circuits, said method comprising the steps of:

providing a chassis with an electrical chassis receptacle having a plurality of connection points therein for the selection of power from said two or more different circuits that are electrically connected to said chassis;

providing a duplex element having at least one electrical duplex receptacle thereon for the delivery of power from one of said two or more electrical circuits to an external device in electrical contact with said at least one receptacle, said duplex element additionally having first conductor means therein for electrical connection to selected connection points in said chassis receptacle, said duplex element being connectable to said chassis in different orientations;

choosing which one of said two or more different circuits is electrically connected to said at least one duplex receptacle by choosing the orientation in which said duplex element is connected to said chassis; and

said chassis having first and second ends with second electrical conductor means extending therebetween, said second conductor means comprising a pre-determined_number of electrical conductors, respective ones of said electrical conductors being electrically connected to respective ones of said connection points in said chassis receptacle;

wherein said first and second ends of said chassis are respectively connectable to the second or first ends of another of said chassis for a series electrical connection therewith.