the present invention is directed in fig1 to an automated animal feeding cabinet 10 for sequentially releasing feed products 12 comprising a rectangular closed box cabinet having a limited left side vertical space portion 14 and an expansive right side vertical space portion 16 separated by a vertical inside wall 18 . the right side portion 16 contains a plurality of horizontally positioned shelves 20 equally spaced vertically and hinged to the right sidewall 22 . the left side portion 14 contains a motor 24 adapted to rotate a vertical jackscrew 26 . the two doors 17 are of equal size and open with door knobs 19 and hinges 21 on the outside edges . the cabinet 10 can be mounted either suspended from a ceiling , on a wall or on posts above a feeding trough 36 . a portion of a trip mechanism 28 is adapted to ascend the rotating jackscrew 26 . a plurality of lever and pin assemblies 30 commensurate in number to the number of the shelves 20 support each shelf from below and extend through the separating vertical wall 18 , whereby the motor 24 and jackscrew 26 operate to release each shelf 20 containing food 12 at predetermined intervals to feed animal ( s ) 34 at scheduled times at the feeding trough 36 . in this illustration , a horse 34 is shown feeding on 3 - 4 in . thick hay flakes . a geared down electric motor 24 drives a sprocket wheel 40 positioned on the top end of the jackscrew 26 via an endless chain 42 . for the protection of users from accidental injury caused by the moving parts , a protective gridded cage 44 houses the motor 24 , sprocket wheel 40 and chain 42 . turning to fig2 , 4 a to 4 c , and 5 in particular , the trip mechanism 28 will be described in detail . fig5 shows the jackscrew 26 with its sprocket wheel 40 supported by an apertured flange and bearing 46 on an upper crossbar 48 on top and another flange and bearing 46 on a lower crossbar 50 . a vertical l - shaped ( in cross - section ) channel bar or standard 52 having a series of three apertures 54 , 56 and 58 are arranged on the standard 52 for positioning the trip mechanism 28 for each shelf 20 . in fig2 and 3 , the critical portion of the trip mechanism 28 for ascending the rotating jackscrew 26 is depicted in two orthogonal views . a u - shaped bracket 60 is attached to a long bolt 62 having a threaded end 64 positioned in a fixed nut 66 and anchored with a locking nut 68 . the opposite end of the rod 62 has a disk 70 fixed between two washers 72 and the head 74 of the bolt 62 . the bracket 60 contains two aligned pins 76 fastened securely by locking nuts 68 , wherein each pin 76 has a matching semicircular and internally threaded notch 78 which frictionally matches the threading of the jackscrew 26 . as seen in fig4 a to 4 c , an extended remaining portion of the trip mechanism 28 is made of three parts or legs . the proximate leg or lever 80 is a flat rod with an optional notch 82 for loosely engaging the jackscrew 26 as depicted in fig5 . it has been found that the trip mechanism when ascending the rotating jack screw 26 and engaging lever 80 would rotate counter - clockwise and travel the length of the lever 80 to retract pin 104 and allow a shelf 20 to drop . the notch 82 was formed to capture the long bolt 62 and prevent it from traveling off the end of lever 80 . it is contemplated that as the mechanisms wear with age , the notch 82 would prevent the trip mechanism 28 from rotating to the point where the long bolt 62 might travel off the end of the lever 80 without the notch 82 . a knob 84 is shown in fig1 but dispensed with in fig4 a and 5 as an alternative . a larger aperture 86 is for positioning the pivot pin 88 on the standard 52 . the smaller aperture 90 is for connection with the middle leg 94 by a pop rivet 32 ( fig5 ). the middle leg 94 depicted in fig4 b has slots 96 having aligned throughbores 98 at both ends of a cylindrical bar for connecting cotter pins ( not shown ). the cylindrical distal leg 100 shown in fig4 c has a slot 96 and aligned throughbores 98 for mounting of a nylon wheel 102 on a pin 104 ( fig1 and 6 ). the opposite end has a flattened tab 106 having a throughbore 108 for connection with the middle leg 94 with a cotter pin . it should be noted that the middle leg 94 and the distal leg 100 function to bend when retracting . the standard 52 has a stop pin 110 for limiting the upward and counter - clockwise rotation of the lever 80 . the topmost aperture 54 of a trio of apertures on the standard 52 is for attachment of one end of a spring 114 . the opposite end of spring 114 is attached to the eye of the cotter pin 116 joining the middle leg 94 to the distal leg 100 ( fig1 and 5 ). the spring 114 maintains the tension as the distal leg 100 is withdrawn partially through the aperture 112 in the inside wall 18 ( fig6 ). it is noted that the shelf 20 is separated by a space from the wall 18 commensurate to enable the shelf 20 to fall down . a flexible hose 118 extending from a trip switch 120 shuts off the motor 24 after uppermost shelf descends and trips the switch 120 . a programmable timer can be programmed to increase the feeding cycle as determined by the user . cabinet 10 : galvanized iron sheeting , 20 gauge ; 46 in . tall , 40 in . wide and 28 in . deep ; doors 17 , 46 in . tall , 20 in . wide . shelves 20 : six shelves , 23 . 5 in . long , 22 in . deep ; front hem 1 in . high . trip mechanism 28 : u - shaped bracket 60 , 2 in . square sides ; 2 pins 76 , 0 . 5 in . diameter , 0 . 5 in . apart , and notches 78 with 13 threads / in . ; bolt 62 , 0 . 5 in . diameter , 7 in . lion ; and disk 70 , nylon , 1 in . diameter . lever ( three parts ) portion of the trip mechanism : lever 80 , 6 in . long , 1 in . wide , 0 . 125 in . thick flat steel ; notch 82 , 1 in . long and 1 in . from the free end ; middle leg 94 , 6 . 25 in . long , 0 . 5 in . diameter steel with slots 96 1 in . deep and 0 . 19 in . wide ; and throughbores 98 , 0 . 19 in . diameter ; and distal leg 100 , 4 . 5 in . length , 0 . 5 in . diameter , tab 106 with 0 . 125 in . diameter throughbore 108 and slotted end 96 1 in . deep and 0 . 19 in . wide to support a 1 . 0 in . diameter nylon wheel . motor 24 : 1 / 50 or fractional hp ., 1 revolution per minute , gear reduction 3 to 1 and preferred 15 to 1 for increased leverage . sprocket wheel 40 : 9 - 27 teeth revolving once in 3 minutes . jackscrew 26 : 45 in . long , 0 . 5 in . diameter , 13 threads / in . it should be noted that the size of the cabinet and the number of shelves required is exemplary to suit the needs of the user and the animals being fed . the gearing can be varied to increase or decrease the feeding interval and even feed for several days without restocking the shelves . it is to be understood that the present invention is not limited to the embodiment described above , but encompasses any and all embodiments within the scope of the following claims .
an automated cabinet for feed products comprises a closable cabinet having two compartments , wherein one expansive compartment contains a plurality of animal feed supporting shelves which pivot downward sequentially from one hinged end at timed intervals by retraction of a lever system activated by an upwardly rotating trip mechanism on a vertical jackscrew rotated by an electric motor operated by a programmed timer . a partition separates the compartments , and supports the lever system for every shelf , and a cutoff switch system for the uppermost shelf .