the foregoing descriptions and drawings should be considered as illustrative only of the principles of the invention . numerous applications of the present invention will readily occur to those skilled in the art . therefore , it is not desired to limit the invention to the preferred embodiments or the exact construction and operation of the preferred apparatus shown and described . rather , all suitable modifications and equivalents may be resorted to , falling within the scope of the invention . further , although the drawings serve to illustrate the present invention , they are not intended to be drawn to scale . referring now to the drawings , a preferred embodiment of a bird feeder according to the instant inventive concepts is designated generally by the reference numeral 20 and is comprised basically of five components , a main component being an elongated tubular hopper 25 seen in detail in fig3 and 4 and in cross - section in fig2 , having an integrally extruded spiral or helical divider 26 internally of a cylindrical shell 28 , preferably formed of a transparent plastic material so that the divider 26 and the bird food contained within the hopper 25 are visible therethrough . the illustrated divider 26 forms preferably three separate compartments 30 , 32 and 34 which are defined by ramps 36 , 38 and 40 extending the full length of the shell 28 , although the spiral divider can be formed to provide only two compartments or more than three compartments , as many as ten or more , in an obvious manner . a second component of the bird feeder 20 is a seed catcher 40 seen particularly in fig1 and 11 , and in cross - section in fig1 . the seed catcher 40 comprises an upstanding central hub 42 with an outwardly extending peripheral portion 44 having slots 46 for a purpose to be described below , and a dished area 48 for catching bird food , such as seeds or the like , in a well known manner . a multiplicity of through openings 50 may be provided to permit rainwater or the like to escape from the dished area 48 . a third component of the bird feeder 20 is a coupler element 60 seen particularly in fig6 and 7 , and in cross - section in fig8 and 9 . the coupler 60 is designed to interconnect the hopper 25 with the seed catcher 40 by press - fit engagement and to direct bird food from the individual compartments 36 , 38 and 40 of the hopper 25 to a series of apertures or feed openings 62 defined at the lower portion of a central hub 64 . an outstanding baffle 66 may be provided at the top of the hub 64 as illustrated . a series of downwardly depending elements 68 are formed about the lower periphery of the hub 64 , with inwardly extending flanges 70 as seen in detail in fig8 a to lockingly engage the coupler 60 in the slots 46 of the seed catcher 40 . the upper portion 64 a of the hub 64 of the coupler element 60 is adapted to frictionally receive and hold the lower portion 28 a of the hopper 25 in the manner seen particularly in fig1 , and the dividers 72 within the middle portion 64 b of the hub 64 divide the coupler element 60 into three vertically segregated , pie - shaped chambers 73 . the chambers 73 direct the bird food , which is fed by gravity from the individual compartments 36 , 38 and 40 of the hopper 25 , to the respective feed openings 62 and , ultimately , to the dished portion 48 of the seed catcher 40 . a partial assembly view of the seed catcher 40 , coupler element 60 and hopper 25 is seen in fig1 and the fully assembled view is seen in fig1 and 2 , wherein it will be recognized that the baffle 66 of the coupler element 60 functions to divert rain or the like from birds feeding at the aperture 62 or from the seed catcher dished portion 48 and , additionally , makes it somewhat more difficult for squirrels to access the bird food . a fourth component of the bird feeder 20 is a domed cap or cover 80 seen particularly in fig1 and 15 , which includes a downwardly depending circular flange 82 adapted to removably fit about the upper portion 28 b of the shell 28 of the hopper 25 , with a series of inwardly extending flanges 84 which sit on the upper edge 28 c of the shell 28 . finally , a hanger or carrier 90 may be provided as seen in fig1 , the end of which is crimped back on itself at 92 to form a loop 94 for hanging the bird feeder 20 from any desired support . the lower end of the hanger 90 may pass through the hopper 25 and have a crimped element 96 to secure the same below portions of the coupler element 60 or the like . the particularly unique aspects of the spiral or helical hopper 25 enables the cost - effective production of this element as a single twisted extrusion . moreover , the spiral ramps 36 , 38 and 40 provide a smooth gravity flow of different forms of bird food from the top to the bottom of the hopper 25 and , ultimately , through the feed opening 62 in the coupler element 60 . obviously , although the three compartments can be filled with the same bird food , the ability to provide independent compartments 36 , 38 , 40 for different forms of bird food not only enables the attraction of different types of bird to a single feeder , but also provides a unique appearance as the different bird foods are viewed through the shell 28 of the hopper 25 . although the particular design disclosed and described herein wherein the spiral hopper 25 is adapted to provide feed at its lower extremity 28 a through the unique coupler element 60 , the spiral hopper concept could be adapted for use in bird feeders of a different design . for example , a multiplicity of vertically - spaced feed openings ( not shown ) can be provided in a well known manner intermediate the top and the bottom of the shell of the hopper , communicating with the individual compartments and , if desired , juxtaposed to perches carried by the hopper . in this manner , different types of bird can feed along the length of the hopper from the bird food in the different compartments . it is believed that those with ordinary skill in the art can readily produce the hopper , coupler , seed catcher and cap elements of the bird feeder of this invention from any suitable plastics material using well known manufacturing techniques . moreover , the shape and dimensions of the individual elements are not critical to the instant inventive concepts and can be varied to suit particular applications . thus , the foregoing descriptions and drawings should be considered as illustrative only of the principles of the invention . numerous applications of the present invention will readily occur to those skilled in the art . therefore , it is not desired to limit the invention to the preferred embodiments or the exact construction and operation of the preferred device shown and described . rather , all suitable modifications and equivalents may be resorted to , falling within the scope of the invention .
a bird feeder includes a hopper having a transparent shell with a spiral internal divider which forms segregated spiral compartments to feed a plurality of different types of bird food . a coupler having segregated vertical chambers , each aligned with an exit end of each segregated spiral compartment , directs the bird food from the hopper to separate feed openings . a seed catcher is attached underneath the coupler and a domed cap covers the top of the hopper .