US2363022A

US2363022A - Magnet release for starting gates

Info

Publication number: US2363022A
Authority: US
Inventors: Steele Bryant
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-07-12
Filing date: 1942-07-15
Publication date: 1944-11-21
Anticipated expiration: 1961-11-21

Description

Nov. 21, 1944. B. STEELE 2,363,022

MAGNET RELEASE FOR STARTING GATES Original Filed July 12, 1940 2 Sheets-Sheet l 4 V ,v r I amw Nov. 21,1944.

B. STEELE MAGNET RELEASE FOR. STARTING GATES Original Filed July 12, 1940 2 SheetS-Sheet Patented Nov. 21, 1944 MAGNET RELEASE FORSTARTINGGATES,

Bryant Steele, Keenland, Ky., assignor to David E. White, Cleveland, Ohio Original application July 12, 1940, Serial No. 345,219. Divided and this applicationJuly 15,

1942, Serial No. 450,995

9 Claims. 01. 292-1) This device relates to a release means for releasing the parts of a permanent magnet, con.- structed for instance of the compositions disclosed in the Ruder patents, Numbers 1,947,274 and 1,968,569; Mishima 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 magnets or sintered Alnico metal magnets These magnets have been of the permanent mag net type, and no means has heretofore been devised to cause the release of the magnet forces of the magnets.

The present application is a division of my copending application Serial; No. 345,219, filed July 12, 1940. 1 1 a 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.

Another object of the invention is to provide a race horse starting gate having doors for the release of thehorses provided with permanent magnets, such as magnets of Alnico metal with means for effecting the release of, or demagnetization of the magnets.

Other objects will appear hereinafter.

In the drawings:

Figure 1 isa plan, view of apai r? of doors of a starting gateprovided with the device of my invention. l I Figure 2 is an elevational viewof the magnet release device shown detached fromthe doors of Fig. 1 for clarity of illustration.

Figure 3 isa top plan view of the device shown in Figure 2, certain parts being shown in section.

Figure 4 is a top plan view of a modification 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 starting 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 base is provided with a recess 3 for the reception of the magnet block 4 which is retained in the recess in fixed position by suitable means which are mounted in the 5 such as the screws 5 side plates.

I manner for holding the Alnico'or other magnetic material, but I prefer to construct th same as 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 configuration. The numeral 9 indicates 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 their other ends. H

Set into the steel or otherferrous metal portion is the sintered Alnicogmagnetic plug 8, an

alloy composed of aluminum, nickel, iron and cobalt; in accordance with the above enumerated patents.

The side plates 2 mount bearing portions I 2 each of which is provided with an elongated slot [3 in which seat the :pins l4 that extend from each side of the secondary short-circuiting armature or release-plate I'5. This plate is therefore pivotall mounted in the slots l3. The plate is provided adjacent its other end with an upstanding ear l6 having an apertur H for the reception of the nose lil of the latch arm I8 as shown provided with a core which, when energized,

pulls thelatch arm downwardly- (Figure 2), to

release the nose from the aperture I! to thereby permit the spring 22 to force the secondary armature into contact with one side of the magnet block. The spring 22 is mountedron top ot the base I.

, The primary armature is designated by the numeral 23. This preferably consists ofa central bronze portion 24 having fixedly attached thereto a ferrous metal portion 25, and on the,

opposite'side another ferrous metal portion, 26.

The ferrous metal portion 25 consists of a series cated at 3|.

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 the centralbronze portion 24.

The primary armature may be guided in its movements toward the magnet block 4 by a metal strap 29 securedto theside platesZ by screws 30.

known construction andmayalso be, mounted as shown in the alternative construction shown in Figure 4 wherein one of the side plates is, indi- The electro-magnet shown may be of any well plates 2 and are provided, with ears, 32-hayin elongated slots 33 in which ar mounted the pins N-T 'oFFrc E- These plates are 'similar' to the 34 forming the pivots for the secondary armature or release plate 35. The electro-magnet is indicated by the numeral 35 and is mounted on the arm 31, which latter is aflixed by suitable means such as the screw 38 to the base 39. The

secondary armature is urged to its closed position by the spring 40 which is mounted on the base by means of the screw 4|. The electro-magnet is provided with a core 42'.

The primary armature is indicated by the numeral 43. This armature is the same or similar to that disclosed in Figures 2 and Band maybe,

guided towards the magnetblockwhich is not illustrated but which is th same'as-th'at shown in Figure3, by the strap 44 which is afiixed to the base by screws 45.

" parts I8, I!) and shown in Figures 2 and 3, or

I have shown in Figure 1 meme to which my invention may be applied. The numerals 46 and 41 indicate pivoted doors of the type illustrated I in my Patent No. 2,193,257, granted March 12;

1940'. As illustrated, theprimaryfiarmature 23 is niountedzona supporting strap 48 connectedadjacent to the endof :the doorL Hi;v The magnet and release shown in Figures 2 and 3 are mounted'adj'acentto the juxtapositioned end of the other door 41. The electro-magnetm is mounted on an arm 49 which is also aflixedto the door 41. An'electric: circuit is indicated by the numeral 50 having a source 5l andia manually operated switch 52. i 1 1 y I It willbe apparent that upon completion of the circuit by operating the switch 52; the latch l8 will be withdrawnfrom the aperture I! whereupon the spring 22 will: immediately force the of passing through the primary armature 23.

When this occurs-the springs tending toopen the doorsllfi and 4-! (shown in Figure 3of my prior patents above) will immediately cause the opening of said pair of doors in the same manner as described in my patent. It is tofbe understood that there are as many pairs of doors as shown in- Figure 1 as there are stalls. Itis-of course obvious" also that each magnet maybe controlled: from a single circuit as indicated in Figure 5 of mypatent. r I

Figure 6- showsanothermanner of applying my invention to a starting gateforrace tracks. In the figure, 54*and 55 indicate vertical posts piv-- otally mounted to the superstructure 53 andpartitions 62 and 6 3; Rigidly mounted on these posts so as to swing therewith are the doors 56 and. I H 3 The arms58 and59 are rigidly mounted on the posts 54 and 55 respectively and swing therewith. When the doors are in closed position as' man cated in the figure'the" magnet 60 mounted 'on the arm53and the primary armature '5 l mounted on the arm 59 contacteach other and hold the pair of doors 56 and 51m closed positionuntil 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 electro -magnet diagrammatically illustrated in Figure 6 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 the parts 35* and 42 in Figure 4. t In each form of embodiment the device may f be manually reset to the position-of Fig. 3 or Fig.

4. In the Fig. 3 device the secondary armature '15 is retracted against the spring 22 to engage the latch parts t9 and H. In the Fig. 4 device the secondary armature 35 is pulled back while 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 for starting horses atva rack track, but'that'thei in fact'any use which includes a permanent mag-.

net or an electro magnet.

I claim? 1. The combination with apairof-cooperating I door-members of a permanent magnet mounted in substantiallyfixed relation to one of the members and a primary armature mounted in substan't'ia'lly fixed relation t'o'the other member for engagement" with the permanent magnet when the members" are in'closed relation, aseoondary armature mounted adjacent to the permanent magnet and movable-between an inoperative position spaced from the'permanent mag-net and an operative position shunting the magnetic fluxof thepei'manentmagnet, and electro-magnetic means for controlling movement of the secondary armature.

2. The combination witha pairof cooperating door members of'a permanent magnet mounted in substantially fined relation to one of the members and a primary armature mounted in sub-- stantiallyfixed' relation to theother member for engagement with the permanent magnet when the members are in closedrelatioma secondary armature mounted adjacent to the permanent magnet and movable between an inoperative position spaced from the permanent magnet and an operative position shunting the magneticflux of the permanent magnet, means biasing the secondary armature to operative position, a latch for holding the secondary armature in inopera-' tive position, and electro-magnetic means for re leasing the latch;

3. The combination as pair ofcooioratihg door members of afpermanent magnet mounted in substantially fixed relation to one of the members and a primary armaturemounted in substantially fixed relation to the other memberfor' engagement with thepermanent magnet when i the members are in closed relation, afsec'ond'ary 4. The combination with a pair of cooperating door members of a permanent magnet mounted the doors are closed, of a permanent magnet in substantially fixed relation to one of the members and a primary armature mounted in substantially fixed 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 magnet to an inoperative position and to swing toward the permanent magnet to an operative position shunting the magnetic flux of the permanent magnet, and electro-magnetic means controlling movement of the secondary armature.

5. The combination with a pair of cooperating door members of a permanent; magnet mounted in substantially fixed relation to one of the members and a primary armature mounted in substantially fixed 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 magnet to an inoperative position and to swing toward the permanent magnet to an operative position shunting themagnetic flux of the permanent magnet, means biasing the secondary armature toward operative position, a latch for holding the secondary armature in inoperative position, and

electro-magnetic means for releasing said latch.

6. The combination with a pair of cooperating door members of a permanent magnet mounted in substantially fixed relation to one of the members and a primary armaturemounted in sub-' stantially fixed 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 magnet to an inoperative position and to swing to-,,

ward thepermanent magnet to an operative position shunting the magnetic flux of the permanent magnet, means, biasing the secondary armature toward operative position, and electro-magnetic means adapted when energized to hold the secondary armature tion.

,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 stantially fixed relation to the other member for mounted in substantially fixed relation to one of the doors, a primary armature mounted in substantially fixed relation to the other door, said magnet and armature being positioned to engage each other in lengthwise alignment when the doors are closed,'and a guide for the armature mounted adjacent to the magnet to interengage with the-armature to prevent relative lateral displacement 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 fixed relation to one of the doors, a primary armature mounted in substantially fixed relation to the other door, said magnet and armature being positioned to engage each other 1 closed, and a guide for the armature fixed adjacent to the magnet and including an opening adapted to be penetrated by the armature and surrounded by a rigid wall engaging with the armature to prevent relative lateral displacement of the armature and magnet when engaged.

9. The combination with a pair of cooperating door members of a permanent magnet mounted in substantially fixed relation to one of the members anda primary armature mounted in subengagement with the permanent magnet when a the members are in closed relation, a secondary armature pivoted adjacent to the permanent magnet to swing away from the permanent magnet to an inoperative position and to swing toward the permanent magnet to an operative position shunting the magnetic flux of the permanent magnet, a spring biasing the secondary armature toward operative position, an apertured ear extending from the face of the secondary armature j opposite the permanent magnet, a movable latch in inoperative posiarm engageable in said aperture for holding the secondary armature in against the opposition of the spring, and an electro-magnet adapted when energized to move the latch armout of the aperture and release the secondary armature for movement by the spring toward operative position.

BRYANT STEELE.

inoperative position-