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Magnet release for starting gates

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Nov. 21, 1944.
‘B. STEELE‘
2,363,022
MAGNET RELEASE FOR STARTING GATES _
Original Filed July 12, 1940
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26 276039
2 Sheets-Sheet l
Nov. 21,1944.
B. STEELE
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2,363,022
MAGNET RELEASE FOR. STARTING GATES
‘ Original Filed July 12, 1940
2 SheetS-Sheet
Patented Nov. 21, 1944
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2,363,022 r
‘UNITED STATES FATE N-T ‘ 'oFFrc E
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2,362,022
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‘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.
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‘a
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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.
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‘The present application is a division of my
1
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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.”
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‘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
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‘ 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
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' 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.
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block. The spring 22 is mountedron top dot the
35 ‘base I.
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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.
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Figure 6 is a front elevational ,viewof ‘a start
' ing gate showing the invention applied in slightly
[modified form.“
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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'.
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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.
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net or an electroem‘agne‘t. i‘
I claim?v
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‘ 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
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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
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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
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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?‘ “
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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.
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" ‘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' '
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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, ‘
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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.
‘ '
1/--pages
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