FIELD OF THE INVENTION
The present invention is directed to a socket for allowing a threaded light bulb or a bayonet light bulb to be quickly and effectively inserted into the socket by axial force, avoiding the need for it to be threaded by rotational forces within the socket to achieve connectivity.
BACKGROUND OF THE INVENTION
Installation and removal of a conventional threaded light bulb into a conventional threaded socket, although well accepted for achieving electrical connectivity, is time consuming. The time involved and energy expended becomes excessive when considering installations involving numerous light bulbs, such as string lights and commercial lighting installations. A socket is intended to secure a light bulb into the socket of the lighting fixture (light strand or other fixture) and to conduct electric current through a positive terminal and a ground terminal of the bulb to achieve illumination. As such, it is imperative that the design of the socket facilitate this electrical connection.
In addition to conventional threaded bulbs, bayonet style bulbs also must be quickly and efficiently installed into sockets. A standard fitting for a bayonet bulb requires a male slot for receiving a female component of the bulb and, often, a spring mounted within the socket to secure the connection between the mating components. As such, a bayonet bulb may be inserted into the socket with axial force and twisted to engage the mating members. The spring then urges against the mating members to remain engaged.
SUMMARY OF THE INVENTION
It is, therefore, advantageous for a socket to receive a threaded bulb without requiring the labor-intensive step of threading the individual bulb into the socket. It is also advantageous to enable quick withdrawal of the bulb such as for replacement of the bulb or disassembly of the installation. It is beneficial to also provide a socket which is configured to operatively receive either a threaded light bulb or a bayonet light bulb, interchangeably.
The present invention overcomes shortcomings of the prior art by providing a novel socket configuration permitting axial forces, such as “pushing”, to be applied to the bulb within the socket to secure the bulb for use and to achieve the necessary electrical connectivity. This and other objectives are met by the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the force-driven socket according to an aspect of the present invention;
FIG. 2 is a front, cross-sectional view thereof;
FIG. 3 is an enlarged profile view of the socket thread configuration;
FIG. 4 is a front, cross-sectional of the force-driven socket according to another aspect of the present invention;
FIG. 5 is an enlarged profile view of the socket thread configuration;
FIG. 6 is a front, cross-sectional view of the force-driven socket according to another aspect of the present invention;
FIG. 7 is an enlarged profile view of the socket thread configuration;
FIG. 8 is a front, cross-sectional view of the force-driven socket according to another aspect of the present invention;
FIGS. 9A-9D are schematic illustrations of flange profiles; and
FIG. 10 is a cross-sectional view of one aspect of the force-driven socket.
DETAILED DESCRIPTION OF THE INVENTION
The present invention will now be described in detail hereinafter by reference to the accompanying drawings. The invention is not intended to be limited to the embodiments described; rather, this detailed description is provided to enable any person skilled in the art to make and practice the invention.
As used herein, the terms “proximal” and “distal” (excluding horizontal cross-sections) are used to refer to the axial ends of the socket and various components. The term “proximal end” refers to the end closely adjacent the socket opening for receipt of the bulb and the term “distal end” refers to the end of the socket for connecting to a wire. Also, as used herein, the “axial direction” refers to the longitudinal axis of the socket, along the center thereof. The term “transverse” direction refers to a direction which intersects the longitudinal axis, at any angle.
As shown in FIGS. 1-3, the socket 10 is generally cylindrical with a hollow, bulb receiving cavity 12 defined therein. The socket 10 includes a distal portion which is a generally cylindrical portion 14 and a proximal open end configured for receipt of a bulb which, as shown, is a generally conical proximal portion 15. The distal portion 14 defines the bulb interface 16.
The bulb interface 16 includes at least one, and preferably a plurality of, flanges 18 for interfacing with the threads of a bulb. As shown in FIG. 2, six flanges are provided, but it is within the scope of the present invention to provide any number of flanges and even a single flange. Moreover, the predefined spaces between adjacent flanges 18 may vary in longitudinal distance.
As shown in FIG. 3, the flanges 10 have a configuration, in the transverse direction, which is generally curved, such as a semicircle. The flanges are formed of a material having a predetermined hardness to provide sufficient flexibility depending upon the tolerances provided. The predetermined flexibility of the flanges provides for a threaded bulb to be inserted into the cavity 12 of the socket 10 with the application of appropriate distal axial force to urge the flanges axially outward and/or distally for insertion of the bulb. The flanges 18 have a predetermined hardness to nonetheless secure the threads of the bulb to prevent unintentional removal of the bulb. The configuration requires sufficient axial forces in the proximal direction to remove the bulb. The flange configuration permits removal of the bulb by rotational forces or axial forces in the proximal direction.
The socket 10 also includes bottom contact 20 which provides the sockets hot electrical contact point and a side contact 21 which provides the neutral conductor. These are provided to complete the electrical transfer to illuminate the bulb.
Another aspect of the present invention is shown in FIGS. 4-5. According to this aspect, the bulb interface 16 includes flanges 18 having a unique axial profile. As shown in FIG. 6, the flanges 18 are substantially curvilinear defined by a curved upper surface 22 and a substantially linear bottom surface 24. The flanges 18 according to this aspect of the present invention therefore permits insertion of a threaded bulb with distal axial forces. Removal of the bulb requires application of radial forces to unscrew the bulb from removal of the bulb interface 16. Axial forces, in the proximal direction, alone will not disengage the bulb from the bulb interface 16.
FIGS. 6-7 illustrate another aspect of the present invention. The bulb interface 16 includes at least one flange 18 and, as shown, a plurality of flanges 18. The flanges 18 are defined by generally linear fingers 18 having a flat upper and bottom surface. The flanges 18 have a predetermined thickness and are formed of a material having a predetermined hardness to provide the desired flexibility. Axial forces in the distal or downward direction are applied to insert the bulb. The flanges 18 provide the necessary securement when cooperating with the bulb threading to prevent unintentional removal. Sufficient axial forces in the proximal or upward direction, in combination with the flexibility of the flanges 18, will enable quick removal of the bulb without damage the socket.
FIG. 8 illustrates another aspect of the present invention when bayonet light bulbs are used in connection with the socket 10. The distal portion 14 of the cavity 12 defines a channel 25 which defines a longitudinal upper portion 26, a lateral medial portion 27 and a longitudinal lower portion 28. Accordingly, corresponding flanges of a bayonet bulb are applied with axial forces (downward) and the bulb flange traverses the length of the upper portion 26, the bulb is rotated by the use with lateral forces whereby the bulb flange traverses the lateral portion 27 and then continued axial force urges the bulb flange into the lower portion 28 of the channel 25. A spring 30 provides upward, proximal forces against the bottom of the bulb to urge the mating bulb flange upward within the lower portion 28 and is securely retained therein. The spring 30 is shown centered on the bottom of the channel 25, but may be positioned off-center as well. Flanges 18, according to any of the aforementioned aspects of the present invention, are defined by the interface assembly 16. Although a flange of a particular configuration is illustrated in FIG. 8, it is to be understood that flanges of any of the configurations disclosed herein may be utilized with the channel 25. The socket 10 according to this aspect may, therefore, be used with either a threaded or bayonet style bulb. Of course, if only a bayonet style bulb is to be used, the flanges 18 may not be present in the socket 10.
FIGS. 9A-9D are schematic representations of various flange 18 profiles which may be employed with the force-driven socket 10. According to these aspects, the bulb interface 16 includes flanges 18 having unique axial profiles. FIG. 9A represents angular flanges 18 with a downwardly sloping upper surface 22 and a generally horizontal bottom surface 24; FIG. 9B represents finger-like flanges with a generally downward sloping upper surface 22 and an angled bottom surface 24; FIG. 9C represents a triangular profile with an angled upper surface 22 and bottom surface 24; and FIG. 9C represents an arcuate flange 18 having curved upper 22 and bottom 24 surfaces.
FIG. 10 is a cross-sectional view of a force-driven socket 10 according to another aspect. The distal portion 14 includes a bulb interface 16 including a plurality of flanges 18. The flanges 18, as shown, include combinations of various configurations outlined above. For example, as shown the interface 16 includes a flange 18 according to FIGS. 9A and 9D. Any combination and any number of any of the aforementioned flange 18 profiles are within the spirit and scope of this disclosure. Moreover, any upper surface 22 may be used in combination with any bottom surface 24.
While exemplary embodiments have been shown and described above for the purpose of disclosure, modifications to the disclosed embodiments may occur to those skilled in the art. The disclosure, therefore, is not limited to the above precise embodiments and that changes may be made without departing from its spirit and scope.
Patent Application
20190017686
