Nov. 21, 1944. ‘B. STEELE‘ 2,363,022 MAGNET RELEASE FOR STARTING GATES _ Original Filed July 12, 1940 24 V ,v r I ’ 23“ \-~- amw/ ’//// 26 276039 2 Sheets-Sheet l Nov. 21,1944. B. STEELE / 2,363,022 MAGNET RELEASE FOR. STARTING GATES ‘ Original Filed July 12, 1940 2 SheetS-Sheet Patented Nov. 21, 1944 ’ A 2,363,022 r ‘UNITED STATES FATE N-T ‘ 'oFFrc E , 1 2,362,022 . , ‘ ‘ ‘MA‘GN‘ET‘ RELEASE FOR‘STARTING‘GATES,‘ ‘ ‘ Bryant Steele, Keenland, Ky.,‘ assignor‘ to ‘Davida » , E. ‘White, Cleveland, Ohio Original application July 12, 1940, Serial No. ‘ 345,219. Divided and this application‘July 15, 1942, Serial No. 450,995 < , 9 Claims. (01. 292-1) This device relates to a ‘release means for re leasing the parts of a permanent magnet, con. ‘ Themagnet block may be made in any suitable I mannerifor holding the Alnico'or other magnetic material, but‘I prefer to construct the same as structed for instance of the‘ compositions dis closed in the Ruder patents, Numbers 1,947,274 and 1,968,569; Mishima shown in Figure 5, wherein 6 is a brass or bronze alloy center portion partially surrounded by a: steel or other‘ ferrous metal portion of general horse-shoe con?guration. The numeral 9 indi cates spaces for the reception of brass strips I 0 which do not extend all the‘ way to the end of the magnet block at one‘ of their ends, and which connect with or abut the brass center portion at patents, _, Numbers 2,027,994 to 2,028,000 ‘inclusive, and the Howe patent; Number 2,192,743, althoughthe invention ' is not limited to the used the compositions dis I closed in these patents except as set forth in the claims. Magnets constructed in accordance with the teachings of one or more ofthese patents have been called by the term of “‘Alnico metal their other ends. , , H ‘a . , magnets” or ‘r‘sintered Alnico metal magnets}? Set into the steel or other‘ferrous metal por ‘ These magnets have been of the ‘permanent mags tion is the sintered Alnicogmagnetic plug 8, an net type, and no means has heretofore been de 15 alloy composed of aluminum, nickel, iron and‘ ‘ vised to cause the releaselof‘ the magnet forces cobalt; in accordance with the above enumerated of the magnets. , , , , , . , , ‘The present application is a division of my 1 , , ; 1 , each of which is provided with an elongated slot a [3 in which seat ‘the :pins l4 that extend from , An object of the present invention is to provide a means for releasing the magnet‘ forces ‘of, or demagnetizin-g, a permanent magnet, such as an “Alnico metal magnet.” , , ‘ ‘The side plates 2 ‘mount bearing portions I 2 copending application Serial; No.‘ 345,219,‘ ?led July 12, 1940. patents. , each side of the secondary short-circuiting arma ture or release-plate I'5. This plate is therefore pivotally mounted in the slots ‘l3. The plate is - , ‘ ‘ provided adjacent its other end with an upstand Another object of the invention is to provide 25 ing ear l6 having an aperture H for, the recep a race horse starting gate having doors for the , tion of the nose lily of ‘the latch arm I8 ‘as shown release of thehorses provided. with permanent - in Figures 2 and 3. , j , ' magnets, such as magnets of Alnicom metal with‘ The electro-magnet ,is indicated at 20 and’ is means for effecting the release of, or, demagnet ‘ provided with a core “which, when energized, ization of the magnets. ' ,30 pulls the‘latch arm downwardly- (Figure 2), to vOther objects will appear hereinafter. In the drawings: ' release the nose from the aperture I‘! to thereby ‘ , permit the spring 22 to force the secondary arma Figure 1 isa plan,‘ view of a‘pai‘r? of doors of a ‘ , ture into contact with one side of the magnet ‘ ‘ starting gate- provided ‘with the device of ‘my invention. ‘ ‘ ‘ , I, l block. The spring 22 is mountedron top dot the 35 ‘base I. I Figure 2 is an elevational view‘of the magnet , The primary armature is designated by the numeral 23.‘ This preferably consists of‘a cen release device shown detached from‘the doors ofv \Fig. 1 for clarity of illustration. tral bronze portion 24 having ?xedly ‘attached, ‘ ‘ Figure 3 is‘a top plan view of the device shown “ in Figure 2, certain parts being, shown in section. thereto a ferrous metal portion ‘25, and on the,’ opposite'side another. ferrous metal portion, 26. Figure 4 is a‘ top plan view of a modi?cation ‘ of the device shown inFigures 2 and 3.‘ , Figure 5 is a detail plan view of the magnet, ‘block. . ‘ r ‘ Figure 6 is a front elevational ,viewof ‘a start ' ing gate showing the invention applied in slightly [modified form.“ r In the drawings the numeral I indicates a ‘ mounting block or base preferably constructed of brass, and provided with ‘side plates 2. ‘ The ferrous metal portion 25 ‘consists of a series , of blocks providing slots 21.‘ ‘Strips of bronze ' material 28 extend almost to the edge of the slots and, connect orabut at their opposite endswith, 45 the centralbronze portion 24. ‘ _ The primary‘ armature, may be guided‘ in its movements toward the magnet block 4 by a metal strap 29 secured‘to theside platesZ by screws 30., The electro-magnet shown may be of any well 50 known construction andmayalso be, mounted as The base is provided with a recess 3 for the‘ shown in the alternative construction shown in reception of the magnet block 4 which is retained Figure 4 wherein one ‘of the side plates is, indi in the ‘recess in ?xed positionlby suitable means ‘cated at 3|. These‘ plates are 'similar'Tto“ the _ such as ‘ the screws 5 which are mounted in the 5 plates ,2, and are provided, with, ears, 32-»haying‘ side plates. ‘ elongated ‘slots 33‘ in which are mounted the pins 2,363,022 held in its, open position by the latch 18 until 34 forming the pivots for the secondary arma ture or release plate 35. The electro-magnet is indicated by the numeral 35 and is mounted on the arm 31, which latter is a?ixed by suitable ‘means such as the screw 38 to the base 39. The secondary armature is urged to its closed position the current is turned on. vWhen the current is turned on the latch I8 is drawn downwardly to release the said secondary armature. In Figure 4 however no latch is provided, and thesecondary armature 35 is retained in its open position as by the spring 40,,which is mounted on the base long as the current‘ is onso that the core 42 is energizedby current in; the magnet‘ 35. ' It is to be understood’ that the term “electro 10 magnetic means” in the claims refers to the by means of the screw 4|. The electro-magnet is provided with a core 42'. ' ‘ The primary armature is indicated by the nu meral 43. This armature is the same or similar " parts I8, I!) and 20 shown in Figures 2 and 3, or to that disclosed in Figures 2 and Band maybe,‘ ‘ ' the parts 35* and 42‘ in Figure 4. t guided towards the magnetblockwhich is not In each form of embodiment the device may f be manually reset to the position-of Fig. 3 or Fig. . illustrated but which is the same'as-th'at shown in Figure3, by the strap 44 which is a?ixed to 4. In the Fig. 3 device the secondary armature '15v is retracted against the spring 22 to engage I have shown in Figure 1 ‘meme to‘ which my ' the latch parts ‘t9 and H. In the Fig. 4 device the base by screws 45. . invention may be applied. the secondary armature 35 is pulled back while ' The numerals 46 and . 41 indicate pivoted doors of the type illustrated I the circuit to the ‘coil 36 is closed. ‘ . It is to be understood that the device of the present invention: may be used not only on gates ' in my Patent No. 2,193,257, granted‘March 12; 1940'. ‘ As illustrated, theprimary?armature 23 is niountedzon- a supporting strap‘ 48 connected‘ad for starting horsesriatva rack track, but'that'thei ' jacent to the end‘of :thei doorLlHi;v ‘The magnet magnet release of; this: invention may be used for and release shown in Figures 2 and 3v are mount anypurpose v'to which it is applicable' Other? ed'adj'acentto the juxtapositioned end of the uses to which my invention maybe put include other door 41. ,‘The electro-magnetm is mount it'sgappl'ication for usewith a magnet». chuck; or in fact'any use which includes a permanent‘ mag~. ed on an arm 49 which is also a?ixedto the door 41.‘ An'electric: circuit is indicated by the nu~ meral 50 having a source 5lvandia manually op erated switch 52. ' i ' 1 1 . - y net or an electroem‘agne‘t. i‘ I claim?v 30 I ‘ " ' ‘ 1. ‘The combination with a- pairof-cooperating I ‘ It willbe apparent‘ that upon completion of the door-‘members of a permanent magnet mounted circuit by operating the switch 52; the latch l8 will be withdrawn- from the aperture I‘! where in substantially?xed relation to one of the mem bers and‘va primary‘ armature ‘mounted in sub stan't'ia'lly ?xed relation t'o'the other member‘ for ' ' upon the spring 22 will: immediately force the secondary ‘armature I151'upwardly‘ asviewed in. ‘ engagement" with, the permanent magnet when Figures 1 and 3. ‘ Themagnetic ?ux'which has the members" are in'closed relation, aseoondary armature mounted adjacent to the ‘permanent passed throughthe primary armature from the magnet and movable-between an inoperative posi magnetic will now be diverted-or shunted and will pass through the plate 'l5.= In“ other words the 40 flux'path will pass through‘ the'plate l5 instead tion spaced from the'permanent mag-net and an operative position shunting the magnetic flux of passing through the‘fprimarywarmature 23.? ‘ of the‘pei'manent- magnet, and electro-magnetic When this occurs-the springs‘ tending to- open the ‘ means for‘ controlling movement‘ of the‘ second~ doorsll? and 4-‘! (shown in Figure 3‘of my prior ary armature. ing of said pair of doors in ‘the same manner as ' = '- ‘Y r " ‘ - bers and’ a primary armature mounted in'sub- obvious" also that each ‘magnet maybe controlled: from a single ‘circuit as indicated in Figure 5 of ' _ in substantially ?ned relation to one of the mem described in my patent. ‘It is to’fbe understood that there are as many pairs of‘ doors as shown in- Figure ‘1? as there are stalls‘. Itis-of course mypatent. ‘ ‘2. The combination witha pairof cooperating door members of'a permanent magnet mounted patents above)v will immediately cause the open I Figure 6- showsanother‘manner of applying my invention to a starting gatefor‘race tracks. In the ?gure, 54*and‘ 55‘ indicate vertical posts pivotally mounted to the superstructure 53 and‘par- ‘ titions 62 and 6:3; Rigidly mounted ‘on these stantially‘?xed' ‘relation to the‘other member for‘ engagement with the permanent magnet when the members are in closed‘relatioma secondary armature mounted adjacent to the permanent magnet and movable between an’ inoperative posi tion spaced from the ‘permanent magnet and an ' operative position shunting ‘the magnetic- ‘flux of the permanent magnet, means biasing the secondary armature to operative position, a latch ; posts so as to swingv therewith are the doors 56v for holding the‘ secondary armature in inopera-' and“. tive position, and el‘ectro-magnetic means for re?‘ “ " I ' H " " ‘ 3 - " '- ‘ leasing the latch; posts 54_and 55 respectively and swing therewith. 60 3.‘ The combination, as > The arms’58 and‘59 are rigidly mounted on the When the doors are in ‘closed position as' man cated‘ in the ?gure'the" magnet 60 mountedi'on ' the arm‘53and the primary armature '5 l_ mount ed on the arm 59 ‘contacteach other v“and hold the pair of doors 56‘ and 51m closed position until the electro-magnet ‘is operated to release the armature 6| from the magnet 50-.‘ The doors are opened'by springs not shown but as indicated iii-Figure 3_of my patent above'referred to. ' The magnet and ‘electron-magnet diagrammatically il lustrated'in Figure 61 are the same‘ in detail as those ‘disclosed in Figures '2‘, 3 or 4 of the applica-' ti'on. ' " " " ' ' I ‘ " ‘It will‘ _be_ noted that the structure shown“ byFigures ‘2"and 3‘ the secondary'armature is‘ pair ofcooioératihg . door members ‘of " afpermanent ‘magnet mounted in substantially ?xed relation to one of the mem bers and a primary armature- mounted in sub-‘ stantially ?xed relation to the other member‘for' ' 65 engagement ‘with the‘perma‘nent magnet when. i the members ‘are in closed relation,- afsec'ond'ary armature‘ mounted‘ adjacent to the permanent magnet and movable between an inoperative posi tion spaced‘ fromlth-e permanent'magnet and an operative position shunting the“ magnetic‘ :flux of the1 permanent v'rnagnet, means biasing the, ‘sec cndary armature to operative position’, ande'l-ec troemagnetic means adaptedwhen energized'to hold the secondary armature; against theiaction of the biasing means, in inoperative position, ‘ 3 r 2,363,022 4. The combination with a ‘pair of cooperating , the doors are closed, of a permanent magnet door members of a permanent magnet mounted in substantially ?xed relation to one of the mem- , bers and a primary armature mounted in sub stantially ?xed relation to the other member for engagement with the permanent magnet when‘ the members are in closed relation, a secondary armature pivoted adjacent to‘ the permanent magnet to swing away from the permanent mag net to ‘an inoperative position and to, swing to mounted in substantially ?xed relation to one of the doors, a primary armature mounted in sub stantially ?xed relation to the other door, said magnet and armature being positioned to‘ engage each other in lengthwise alignment when the door members of a permanent; magnet mounted in ‘substantially ?xed relation to one of the mem doors are closed,'and a guide for the armature mounted adjacent to the magnet to interengage with the-armature to prevent relative lateral dis placement of the armature and magnet when engaged. 8. The combination, with a pair of hinged doors having free edges adapted to meet in a dihedral angle less than a straight angle when, the doors are closed, of a permanent magnet mounted in substantially ?xed’ relation to one of the doors, ward the permanent magnet to an operative posi surrounded by a rigid wall engaging with the ar ward the permanent magnet to an operative posi tion shunting the magnetic ?ux of the permanent magnet, and electro-magnetic means controlling movement of the secondary armature. 5. The combination with a pair of cooperating a primary ‘armature mounted , in substantially bers and a primary armature mounted in sub ?xed relation to the other‘ door, said magnet and stantially ?xed relation to the other member for engagement with the ‘permanent magnet when 20 armature being positioned to engage each other 1 in lengthwise aligmnent when the doors are the members are in closed relation, a secondary “ closed, and a guide for the armature ?xed adja armature pivoted adjacent to the permanent cent to the magnet and including an opening magnet to swing away from the permanent mag- ‘ adapted to be penetrated by the armature and net to an inoperative position and to swing to mature to prevent relative lateral displacement tion‘shunting the‘magnetic flux of the permanent of the armature and magnet when engaged. magnet, means biasing the secondary armature 9. The combination with a pair of cooperating toward’ operative position, a latch for holding the door members of a permanent magnet mounted [ secondary armature in inoperative position, and electro-magnetic means for releasing said latch. 30 in substantially ?xed relation to one of the mem bers and‘a‘ primary armature mounted in sub 6. The combination with a pair of cooperating stantially ?xed relation to the other member for . door members of a permanent magnet mounted in substantially ?xed relation to one of the mem bers and a primary armaturemounted in sub-' engagement with the permanent magnet when a the members are in closed relation, a secondary armature pivoted adjacent to the permanent stantially ?xed relation to the other member for engagement with the permanent magnet when the members are in closed relation, a secondary, armature pivoted adjacent to the‘ permanent magnet to‘ swing away from the permanent mag net to an inoperative position and to swing to-,, 40 ward thepermanent magnet to an operative manent ‘magnet, means, biasing the secondary armature toward operative position, and elec tro-magnetic means adapted when energized to hold the secondary armature in inoperative posi , toward‘ operative position, an apertured ear ex secondary armature in inoperative ‘ position against the opposition of the spring, and an elec tro-magnet adapted when energized to move the ‘ latch arm‘out of the aperture and release the ,7. The combination, with a‘ pair of hinged doors having free edges adapted to meet in a dihedral angle less than, a straight ‘angle when ward the permanent magnet to an operative posi tion shunting the magnetic ?ux of the permanent magnet, a spring biasing the secondary armature tending from the face of the secondary armature j opposite the permanent magnet, a movable latch arm engageable in said aperture for holding the position shunting the magnetic flux of the per- , tion. magnet to swing away from the permanent mag net to ‘an inoperative position and to swing to secondary armature for movement by the springv 50 toward operative position. ‘ BRYANT STEELE. ‘ '