Central shaft power connector for lighted ornaments

Abstract

A central shaft power connector for lighted ornaments is disclosed. A central support pole, such as for a Christmas tree is made in multiple parts joinable with an electrical and mechanical connector which joins the pole parts and simultaneously connects power or other circuits from one part to the other. The connector has two engaging sections and an outrigger platform which locates a connector off to the side of the poles but in alignment. Final alignment is obtained by a key and keyway in the connector parts. The connector is friction fit into a slot on each section so that the connector can be removed and replaced.

Claims

1. A central pole connector for electrically and mechanically joining an ornamental lighting pole of at least first and second segments, to create a contiguous pole along a central axis, comprising: a connector having first and second portions, each having upper and lower ends; said first portion having a first central aperture on the lower end and a tubular projection at the upper end, said projection being sized to be received within the first pole segment; said second portion has an upper central projection on the upper end and sized to be received within the first central aperture of the first portion; said second portion including a lower aperture on the lower end and sized to receive the second pole segment; said first portion including a first connector part extending therefrom; said second portion including a second connector part extending therefrom; said first and second connector parts being alignable to electrically engage when said first and second portions are engaged; one of either said first central aperture or said upper central projection including an alignment key projecting generally orthogonally from said central axis, another of said first central aperture or said upper central projection including a keyway slot extending along an inner periphery of said first central aperture or along an outer periphery of the upper central projection; said keyway slot having a predetermined width at least large enough to accommodate the alignment key and a front end opening including a pair of curved guide edges which have an upper opening wider than the keyway slot.

2. The connector of claim 1 wherein said upper central projection in said second portion includes distal and proximal ends, and wherein said proximal end is flared to be gradually wider than said first central aperture, so as to frictionally engage said first portion.

3. A central pole connector for electrically and mechanically joining an ornamental lighting pole of at least first and second segments, to create a contiguous pole along a central axis, comprising: a connector having first and second portions, each having upper and lower ends; said first portion having a first central aperture on the lower end and a tubular projection at the upper end, said projection being sized to be received within the first pole segment; said second portion has an upper central projection on the upper end and sized to be received within the first central aperture of the first portion; said second portion including a lower aperture on the lower end and sized to receive the second pole segment; said first portion—including a first connector part extending therefrom; said second portion including a second connector part extending therefrom; said first and second connector parts being self-alignable to electrically engage when said first and second portions are engaged; one of either said first central aperture or said upper central projection including an alignment key projecting generally orthogonally from said central axis, another of said first central aperture or said upper central projection including a keyway slot extending along an inner periphery of said first central aperture or along an outer periphery of the upper central projection; said keyway slot having a predetermined width at least large enough to accommodate the alignment key and a front end opening including a pair of converging guide edges, so that when said projection engages said slot, it will tend to align the projection with the keyway slot.

4. A central pole connector for electrically and mechanically joining an ornamental lighting pole of at least first and second segments, to create a contiguous pole along a central axis, comprising: a connector having first and second portions, each having upper and lower ends; said first portion having a first central aperture on the lower end and a tubular projection at the upper end, said projection being sized to be received within the first pole segment; said second portion has an upper central projection on the upper end and sized to be received within the first; central aperture of the first portion; said second portion including a lower aperture on the lower end and sized to receive the second pole segment; said first portion including a first connector part extending therefrom; said second portion including a second connector part extending therefrom; said first and second connector parts being alignable to electrically engage when said first and second portions are engaged; said upper central projection including an alignment key projecting generally orthogonally from said central axis, said first central aperture including a keyway slot extending along an inner periphery of said first central aperture or along an outer periphery of the upper central projection; said keyway slot having a predetermined width at least large enough to accommodate the alignment key and a front end opening including a pair of curved guide edges which have an upper opening wider than the keyway slot.

Description

BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS

(1) FIG. 1 is a perspective view of a Central Shaft Power Connector for Lighted Ornaments.

(2) FIG. 2 is an exploded side view of FIG. 1.

(3) FIG. 3 is a side perspective view of the lower/second part of the connector.

(4) FIG. 4 is a view like FIG. 3 except the rear plan.

(5) FIG. 5 is a view like FIG. 3 except the front plan.

(6) FIG. 6 is a view like FIG. 4 except the side plan.

(7) FIG. 7 is a bottom plan view.

(8) FIG. 8 is a perspective view of the upper/first portion of the connector.

(9) FIG. 9 is a rear plan view of FIG. 8.

(10) FIG. 10 is a front plan view of FIG. 9.

(11) FIG. 11 is a side plan view of FIG. 10

(12) FIG. 12 is a top plan view of FIG. 11.

(13) FIG. 13 is a side view of a removable collar/sleeve in FIG. 2.

(14) FIG. 14 is a perspective view of the collar.

(15) FIG. 15 is a top view of the collar.

(16) FIG. 16 is a view like FIG. 13 rotated 90 degrees.

(17) FIG. 17 is a perspective view of a portion of FIG. 12.

DETAILED DESCRIPTION

(18) FIGS. 1 and 2 illustrate a preferred installation on a Christmas tree pole or other ornamental lighting fixture which requires power being supplied from one portion of the structural pole to the other.

(19) Here is a description of subcomponents: 8 is a central axis along which several parts are aligned; 10 the system of pole and connector; 12 the connector; 14 the upper/first portion of the connector; 16 the lower/second portion of the connector; 18 the upper/first central pole segment with branches showing; 20 the lower/second central pole segment with branches showing; 22 (FIG. 2) collar/sleeve. The retainer collar 22 includes a pair of opposing hooks 23 (only one shown) which have a lip which engages ridge 35 on ledge 36 including a flange extension 37 which receives a connector 38. The collar is used to clamp a further part of the pole to this connector. Element 30 is the upper portion protrusion/projection having two diameters 30a/30b and tapered section 30c therebetween. The projection is sized to be received within pole portion. Collar 22 fits and snaps over section 30a and creates a gap between the two diameters which provides a strong connection with the pole segment.

(20) The following is a description of elements shown in the figures: 33 is the gap between the collar 22 and the projection 30a (the taper in projection 30a may be taller than shown in FIG. 1 to provide more stability), the gap is sized to receive pole segment 18; 34 is the base of the upper portion 14; 35 is an aperture (FIGS. 2 and 12) in portion 14 and sized to receive projection/key 80; 36 is a radial and orthogonally extending ledge which is offset from the central axis 8; 38 is a connector projection with wires 40 to be connected to a power plug, not shown; 42 (FIG. 8) are apertures for receiving electrical contacts 44 (FIGS. 8 and 12); 50 is a projection extending from lower section 16. It has a tapered or flared section 52 at its proximal end to frictional engage diameter 30a; 54 is a base of the lower portion 16; 56 is a radial and orthogonally extending ledge; 58 is a connector projection sized to mate and engage with projection 38; 60 is a collar extending from based 56, coaxially aligned with projection 50 and defining a recess 66 (FIG. 7); 70 is a recess area (FIG. 12) in upper part 14 which is sized to receive connector 58 from the lower part; 80 is a key projection in projection 50 of lower part 16. 82 is a keyway slot in aperture 66 (FIG. 7) which receives key 80 to insure the alignment of connectors 38 and 58 when upper and lower parts are brought together. Keyway 82 also shown is FIG. 12, preferably includes angled portions 82a on either side of the keyway and a concentric section 83 which is sized to receive projection 50. The concentric section is interrupted by the keyway 82 and has a curved edge instead of a sharp corner at the keyway slot. This curved edge assists in urging a misaligned projection 80 into the slot by urging it to align into the center of the slot.

(21) There is disclosed a central pole/staff which is composed of at least two parts 18, 20, one of which is received partially within the other to create, via a connector 12, a contiguous pole along a central axis 8. The pole may be made of two segments, a first 18 and second 20 segment, each segment being connected to a two-part joint/connector 12 having first/upper 14 and second/lower 16 portions respectively.

(22) The two portions fit into each other and fit into the pole segments. The portions form an intermediary joint between pole segments.

(23) The first portion has a central aperture 35 on its lower end and a tubular projection 30 (which may be circular, noncircular, or keyed) on the upper end sized to be received within the first pole segment. The second portion 16 has an upper central projection 50 sized to be received within the first portion aperture 35. The second portion also has a lower aperture sized to receive the second pole segment therein.

(24) The first portion 14 includes a first ledge 36 extending generally orthogonally away from the segments and the axis 8. The first ledge includes a first connector part 38 extending orthogonally therefrom.

(25) The second portion 16 includes a second ledge 56 extending generally orthogonally away from the segments and the axis 8. The second ledge includes a second connector part 58 extending therefrom. Said first and second connector parts 38/58 aligned to electrically engage when said first and second portions are engaged. In an alternate embodiment, the electrical connectors are omitted and a separate power line is provided.

(26) In some embodiments, the first connector part includes a first block 38, having a plurality of terminals 42 and the second connector part 58 includes a recess 70, 44 and terminals for receiving and electrically connecting to the block. In this embodiment, the block 38 is a removable and replaceable electrical receptacle friction fit into flange 35 which is part of a plate which extends from collar 22. Block 38 is preferably a female electrical connector. In North America that is a twin flat blade receptacle for receiving a standard power plug on its upper face and a pair of prongs on its lower face, though these could be reversed. Block 38 is retained in flange 35 by a notch therein sized to be just smaller than the width of block 38 thereby providing a frictional fit.

(27) Both connector blocks 38 and 58 are removable and retained by the same mechanism, preferably a friction fit. This allows the use of standard connector blocks that do not need to be molded into the remaining structures.

(28) In FIG. 3 and FIG. 8, there is a slot in plate 35, 37 which is bounded by parallel opposed arms 43, 41 which define a slot therebetween. The slot width is sized to be equal to, or slightly smaller than the width of the connector 35, 38. In the preferred embodiment, the arms are able to flex slightly so that the connector can be accommodated for insertion and removal. If the slot is equal to or slightly larger than the width of the connector, adhesive can be used. The depth of the slot is at least a portion of depth of the connector. In the preferred embodiment it is half or more. It can be more than the depth of the connector. In that case, the distal ends of the slot may include inward protrusions which capture the connector and prevent it from sliding out. The connector and gap sidewalls may also include sliding grooves or lands/recesses to guide the insertion and maintain the connector's orientation on the flange.

(29) In some embodiments the aperture 66 on said first portion includes a guide keyway slot 82 and the projection 80 on said second portion includes a key pin, so that the slot and pin maintain alignment of the connecting blocks when brought together. This is an aligner which maintains the portion in rotational alignment (i.e. to prevent rotation and to minimize the torque on the electrical connectors) when said portions are brought together so that said connectors align and engage. As mentioned, the upper portion of the keyway 82 may have a funnel shaped curved leading edges on either side of the sloped opening to create a trough shaped opening 83a which allows the projection 80 to be urged along the funnel shaped curved slanted sidewalls on both sides of the slot opening 80 at the open end of the projection 30. See FIG. 17. The slot 82 which has a width sufficient to allow the entry of projection 80 also includes a front end opening with a pair of curved guide edges 82a which have an upper opening wider than the slot and converge to a width equal to the slot width. These edges 82 follow two curves simultaneously a) a downward curved slope to mate with the slot and b) a circular curve which mates with the inner curvature of aperture 35.

(30) In some embodiments, the aperture on the first portion includes a tapered section 30c and wherein the projection on said second portion includes an expanded diameter 52 section at its proximal end, said expanded diameter section and said tapered section being sized to mate with each other.

(31) The description of the invention and its applications as set forth herein is illustrative and is not intended to limit the scope of the invention. Variations and modifications of the embodiments disclosed herein are possible and practical alternatives to and equivalents of the various elements of the embodiments would be understood to those of ordinary skill in the art upon study of this patent document. These and other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.