Surface accessible wiring system and assembly

• US 5,024,614 A
• Filed: 05/16/1989
• Issued: 06/18/1991
• Est. Priority Date: 09/26/1988
• Status: Expired due to Term

• Current Assignee: AMP Incorporated (Johnson Controls International plc)
• Original Assignee: AMP Incorporated (Johnson Controls International plc)
• Inventors: Lauterbach, John H., Dola, Frank P., Feldman, Steven, Mengelson, William G.
• Primary Examiner(s): Paumen, Gary F.
• Application Number:
  US07/352,792
• Time in Patent Office: 763 Days
• Field of Search: 52/242, 52/287, 174/48, 174/101, 439/113, 439/114, 439/215
• US Class Current: 439/114
• CPC Class Codes: H02G 3/0431 Wall trunking
• CPC Class Codes: H02G 3/128 in plinths, channels, raceways or similar

Abstract

A surface accessible wiring system for the distribution of power and signal conductors such as telephone or data conductors is disclosed. A raceway comprises a channel member having a plurality of compartments, a cover which can be securely snapped to the raceway channel and a plurality of connector housings. Each raceway component is extruded from a material such as aluminum. Ribs on the cover and the connector housings are securely snapped into engagement with lips on the channels so that the covers can only be removed with the use of a tool. The channels are shallow so that the raceway assembly can be mounted substantially flush with the exterior surface of a wall or a wall panel, either at the base or top of the wall or at desk level.

Claims

1. An enclosure comprising a channel of a given axial length having a transverse base with upstanding sides extending along said given length and terminated by lips directly inwardly parallel to said base, each lip including a rounded surface of a given radius, a further mating element adapted to be snap-fitted to said channel to form said enclosure, said mating element including an interior surface at each side thereof and there adjacent a pair of stiff projections, one for each side extending along the length thereof with each projection including a concave surface of a radius adapted to receive in mating engagement the said rounded surface of each lip, said further element being loaded in compression and said upstanding sides of said mating element being loaded in bending when the further element is mated with the upstanding sides of the transverse base, the length of said upstanding sides being substantially less than the height of said mating element so that the upstanding sides remain relatively inflexible, so that said further element is tightly secured to the base said further mating element being snap fittable between said upstanding sides by hand applied pressure and said further element being removable only upon the application of a force applied by a tool having a lever arm, wherein there is provided means allowing said further element to be positioned loosely attached to said channel at one side thereof permitting inspection of the interior of said channel prior to said further element being snapped into closing position on said enclosure.

2. The enclosure of claim 1 wherein the said rounded surface of each said lip and each said concave surface are dimensioned at the sides of said channel and said further element respectively to provide seams therebetween less than 0.003 inch wide.

3. The enclosure of claim 1 wherein the said rounded surfaces of said lips are spaced transversely apart a distance less than the transverse spacing of said concave surfaces of said further element whereby to provide an interference fit precluding separation of said further element from said channel by unaided hand-applied force.

4. The enclosure of claim 1 wherein the said further element comprises a cover having an exterior flat surface.

5. The enclosure of claim 1 wherein the said further element comprises an outlet box.

6. The enclosure of claim 1 wherein the said channel and further element have constant cross-sectional configurations along the lengths thereof such that the said element can be fitted axially to said channel at any position along the length thereof through engagement of said lips and said projection surfaces.

7. The enclosure of claim 1 wherein the said projections of said further element include further surfaces beveled inwardly with respect to the center axis of said further element at an angle to provide a camming action through engagement with a lip of said channel during closure of said further element with said channel.

8. The enclosure of claim 1 wherein each lip includes a flat narrow surface adjacent to said rounded surface, the flat surface and the inner surface of said further element fitting tightly together along the length thereof when mated to preclude the insertion of a tool edge or the like between said surfaces to pry said element from said channel.

9. A raceway enclosure assembly for accommodating conductors for termination to electrical outlets, said enclosure assembly including a channel having interiorly thereof projections defining slots extending along the length of said channel, a plurality of conductor guides having end portions adapted to fit within said slots and be held affixed to said channel prior to insertion of said conductors and further portions extending outwardly of said channel to guide the insertion of conductors therein, the said guide elements including flexible portions foldable into said channel following the insertion of conductors therein and having projections adapted to fit in further slots in said channel to hold said conductors in position therewithin.

10. The raceway assembly of claim 9 wherein said guide members are of a length forming a fractional segment of the length of said channel and are adapted to be placed periodically along the said channel.

11. The raceway enclosure assembly of claim 9 wherein there is provided a further set of projections interiorly of said channel forming a further set of slots adapted to receive a second conductor guide element including end projections adapted to fit within said further set of slots and hold said conductors within said channel.

12. The raceway enclosure assembly of claim 9 wherein there is further included a conductor dividing portion extending from the base of said channel whereby to provide at least two compartments for conductors fitted within said channel.

13. An enclosure for conductors, including a channel adapted to be attached to a fixed surface, said channel having a transverse base and side portions terminated in lip portions and there adjacent surfaces parallel to said base, a further element including stiff projections having concave surfaces that fit the said lip portions and further including beveled portions extending inwardly to engage said lip portions upon attachment of said further element to said channel whereby to cam the said side portions of said channel outwardly to permit seating of said lip portions within said concave surfaces to tightly hold such channel and further element together, said channel including further means defined by projections extending from within said channel adapted to engage the end of a said stiff projection and hold said further element loosely attached to said channel at an angle permitting inspection interiorly thereof.

14. A raceway assembly for accommodating power and data conductors in separate compartments, said assembly including a channel having at least one center projection adapted to define at least two compartments, a cover element including means at the edges of said cover element to lock such cover element to said channel and means interiorly thereof to engage such projection to enclose said two compartments, a first outlet housing means for accommodating a given electrical connector device including a rear wall apertured to be aligned with one of said compartments, and a second outlet housing means for accommodating a further electrical connector device and including a rear wall apertured to be aligned with another of said compartments whereby conductors in a given compartment can be connected to devices through such rear wall apertures in said outlet housing means.

15. The assembly of claim 14 wherein the rear walls of the first and second outlet housing means have means at the edges thereof to lock the respective outlet housing means to the channel.

16. The assembly of claim 15 wherein the means on the rear walls of the first and second outlet housing means to lock the respective outlet housing means to the channel are of the same shape as the means on said cover element to lock said cover element to said channel.

17. The assembly of claim 16 wherein the cover element comprises a flat member protruding beyond a front edge of the channel and the center projection by a distance substantially equal to the thickness of the cover element.

18. The assembly of claim 17 wherein the center projection protrudes from a base of the channel and includes a barrier wall extending parallel to the base, the height of the barrier wall being less than the height of the compartment above the center projection.

19. The assembly of claim 18 wherein barrier walls are located on an outer face of each compartment, the cover element being mounted in contact with the barrier walls.

20. The assembly of claim 19 wherein the rear walls of the first and second outlet housing means are mounted in contact with the barrier walls, the first and second outlet housing means protruding beyond the cover elements.

21. The assembly of claim 14 wherein the channel comprises a abase with top and bottom walls extending transversely from top and bottom edges of the base, each wall having an inwardly directed lip at the free end thereof, the means for locking the cover element to the channel comprising continuous ribs on an inner face of the cover element.

22. The assembly of claim 21 wherein each continuous rib has a concave radiused surface on an outwardly facing surface thereof at the juncture of the rib and the cover element, an inwardly sloping flat surface of each rib extending from the radiused surface, the concave radiused surfaces being configured to tightly engage the inwardly directed lips of the top and bottom walls, the flat surface of each rib defining a guide surface for initially engaging the corresponding inwardly directed lip.

23. The assembly of claim 22 wherein an interior wall portion is located adjacent the bottom wall, the center projection and the interior wall portion each having a barrier portion at the ends thereof, each barrier portion being parallel to the base and having a height, less than the height of a corresponding compartment, so that each compartment is partially open on a front face prior to attachment of the cover element to the channel.

24. The assembly of claim 23 wherein the inner wall initially projects transversely from the bottom wall, spaced from the base, and then extends parallel to and spaced from the bottom wall, the barrier portion of the inner wall extending perpendicular to the bottom wall in substantially the same plane as the inwardly directed lip on the bottom wall.

25. A surface accessible raceway for accommodating conductors, the raceway being suitable for mounting on a structural wall having a wall finish layer of predetermined thickness covering the structural wall, the raceway including a channel, a cover securable to the front of the channel and means for securing the channel to the structural wall:

the channel further comprising a base with upper and lower sides having a depth approximating the thickness of the wall finish layer so that the front of the channel is substantially flush with the surface of the wall finish layer, each of the sides having inwardly directed lips oriented parallel to the base, the channel also having a center partition extending parallel to the sides and dividing the channel into two compartments, each compartment being at least partially open on the front and having a height substantially greater than the depth of the compartment, with means being located at the front of each compartment for retaining conductors in the channel prior to securing the cover to the channel;

the cover further comprising a flat planar plate having opposed stiff projections protruding from an inner surface of the flat planar plate adjacent the edges thereof, the stiff projections engaging the inwardly directed lips on the interior of the sides to secure the cover to the channel so that the raceway protrudes beyond the wall finish layer to a distance no greater than the thickness of the flat planar member, wherein the means for retaining conductors in the channel prior to securing the cover to the channel comprises flexible conductor retainer guides insertable in each compartment, the lower end of each flexible conductor retainer guide being held in its associated compartment and the upper end of each flexible conductor retainer guide initially extending beyond the front of the associated compartment so that the conductors can be laid into associated compartments, the upper end of each flexible conductor retainer guide being insertable into the associated compartment after the conductors are laid in the proper compartment.

26. The surface accessible raceway of claim 25 wherein the means for retaining conductors in the channel prior to securing the cover to the channel comprises a barrier extending upwardly along a portion of each compartment to form a trough along the bottom of each channel so that conductors can be laid in the trough prior to securing the cover to the channel to close the raceway, the barriers comprising an integral part of the channel.

27. The surface accessible raceway of claim 26 wherein an interior wall portion in a lower said compartment, adjacent the lower side of the channel has a barrier extending upwardly on the front of the channel and the partition also has a barrier extending upwardly on the front of the channel, each barrier having a height less than the height of the associated compartment so that the front of each compartment remains open for the insertion of conductors, the partition, the interior wall portion and the barriers comprising integral parts of a one piece extruded channel.

28. The surface accessible raceway of claim 25 wherein each compartment has a trough defined by a barrier on the front of the channel parallel to the base, and at the bottom of the associated compartment, the flexible conductor retainer guides being insertable into the associated through with the upper end of each flexible retainer guide initially extending beyond the associated barrier so that conductors can be laid in the proper compartment.

29. The surface accessible raceway of claim 28 wherein the a plurality of flexible retainer guides are insertable at intervals in associated compartments, the flexible retainer guides and the barriers forming the means adjacent the front of the channel for retaining conductors in the channel prior to securing the cover to the channel.

30. The surface accessible raceway of claim 29 wherein an interior wall portion extends adjacent the lowermost side of the channel, the lowermost stiff projection on the cover being insertable between the interior wall portion and the lowermost side to hold the cover in a partially open configuration so that the conductors in the compartments can be inspected prior to closing the raceway.

31. The surface accessible raceway of claim 25 wherein the depth of the channel is substantially equal to five-eights of an inch so that the channel will be flush with a surface finish layer comprising standard drywall.

32. The surface accessible raceway of claim 31 wherein the stiff projections engage the lips on sides of the channel with sufficient force such that the cover cannot be pried from the channel by a force applied to the top or bottom of the cover without damaging the drywall.

33. An enclosure comprising a channel of a given axial length having a transverse base with upstanding sides extending along said given length and terminated by lips directly inwardly parallel to said base, each lip including a rounded surface of a given radius, a further mating element adapted to be snap-fitted to said channel to form said enclosure, said mating element including an interior surface at each side thereof and there adjacent a pair of stiff projections, one for each side extending along the length thereof with each projection including a concave surface of a radius adapted to receive in mating engagement the said rounded surface of each lip, said further element being loaded in compression and said upstanding sides of said mating element being loaded in bending when the further element is mated with the upstanding sides of the transverse base, the length of said upstanding sides being substantially less than the height of said mating element so that the upstanding sides remain relatively inflexible so that said further element is tightly secured to the base, said further mating element being snap fittable between said upstanding sides by hand applied pressure and said further element being removable only upon the application of a force applied by a tool having a lever arm, wherein said channel includes a further surface interiorly thereof projecting to engage a surface of the said projection of said further element to permit said further element to be loosely attached to said channel in a position at an angle to the plane of the base thereof whereby to permit inspection of the interior of said channel while said further element is loosely attached thereof.