close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2124629

код для вставки
July 26, 1938.
_
~
B. E. O'HAGAN
'
2,124,529
“RAILWAY TRACK CIRCUIT'APPARATUS
'
Filed oct. 30. 1957
2
Fig? 1.
22
24
Signal
28
' Control ' ———'\29
2
1
52
2
7
L
19
21
S
’ INVENTOR
v j_:___( . Benxardz O'Iizgan
‘ B
98
.
.
I HIS
ATTORNEY
2,124,629
Patented July 26, 1938
. ‘UNITED ' STATES
PATENT’ ‘owner.
2,124,629 '
RAILWAY TRACK} CIRCUIT APPARATUS
Bernard E.'0’Hagan, Swissvale, Pa., assignor to
The ‘Union Switch & Signal Company, Swiss- ‘
vale, Pa., a corporation of Pennsylvania
Application October 30,
' 15 Claims.
My invention relates to railway track circuit
apparatus, and has for an object the provision
of a novel- track relayarrangement having a
high degree of shunting sensitivity when a train
5 occupies the track circuit with which it is as
'
sociated.
'
(01. 246-41)
ing, engage ?xed contacts 20 and 2|, respec
tively.
.
The secondary relay S receives operating en
ergy from a suitable source of current having
the terminals B—C, over the front contact I9—
2‘! of relay R. Relay S controls, over its back
I
I shall describe two forms oftrack circuit ap
paratus embodying my invention, and shall then
point out the novel features thereof in claims.
10
1937, Serial No. 171,928
contact 22—23, the short-circuiting of , winding
M, and over its back contacts 24-25 and 26-21,
the closing of the pick-up circuit for relay R.
In the accompanying drawing, Fig. 1 is a dia
Relay S is preferably designed to» have a slightly 1 T)
grammatic view illustrating one form of track
circuit apparatus embodying my invention. Fig.
2 is a diagrammatic view showing a modified
retarded pick-up so that a momentary closure of \
contact l9l—2l will notgcau'se relay S to pick up‘,
thus avoiding undesired signal ?ashes due to
form of the apparatus‘ of Fig. 1, also embody- ' opening of' contact 28-29 and closing of co'n-_
tact 28-40,- which ‘might otherwise result ‘dur
A
15 ing my invention.
‘ .
'
Similar reference characters refer to similar i-ng a momentary loss of shunt.
Having described the various elements of Fig.
parts in each of the two views.
1 comprising the apparatus embodying my 'in
Referring to Fig. 1 of the drawing, the ref
erence characters I and 2 designate the track
20 rails of a section of railway track de?ned by
insulated'rail joints 3 at each end of the section.
Connected across the rails at one end of the
track section is asource of current 4, here shown
as a- battery, which supplies current to the track
25 circuit over a current limiting resistor 5.
vention, I shall now describe the operation of
this apparatus-
'
.
When the track section is unoccupied, the ap
paratus will be in the condition in which it is
illustrated in Fig. 1 of the drawing. That is,
relay Rv will’ be maintained energized over a hold
ing‘ circuit which may be tracedfrom theleft
The reference character'R. designates‘a track hand terminal of battery 4', limiting resistor 5,
relay comprising three parallel cores 6, ‘I, and 8,. rail 2, winding II, wire-3|, resistor 32, upper
two ofhwhich, 6 and v8, are connected at. their portion'of‘ winding I2, wire 33, front contact
upper ends by abackstrap 9." The remaining
30 core 1 is spacedfrom the backstrap by an air
gap Ill.
The cores 6- and 8 are provideduwith
operating windings I I and I2, respectively, which
receive energy from the rails of the section over
circuits which will be traced in detail herein35 after.
Accordingly, two magneticcircuits are
provided,~one of which includes core 6 and the
other ‘of which includes core 8, with the core 1
common to both magneticcircuits. The wind
ings II and I2 are so disposed ‘that the ?uxes
40. due to these windings aid one another in the
common core ‘I. Core 6 is equipped with a short
circuited retarding winding I3, and core 8 is
equipped with a similar winding l4, but the lat
ter winding is normally an open circuit and
45 becomes short-circuited only when the second
ary relay S is released.
_A tractive armature I5 is pivotally supported
at bearing I6 for swinging movement toward
and away from the cores 1 and 8, and a similar
50 tractive armature I1 is similarly supported for
movement with respect to cores 6 and ‘I.
The
armatures I5 and H are biased by gravity to
an open position away from the respective cores
and carry. contact?ngers l8 and I9 which, in
the closed armature position shown in the draw
I'8‘—-20, wires 34' and 35, and rail I, to‘ the right
hand terminal of the battery. The secondary
relay
contact
S 'will
I9—2l
be maintained
of relay R, energized
and so the
overappro
front
priate signal circuit will be closed at front c'orl- '
tact 284.38 of this relay. The pick-up circuit
for relay R and the circuit for the retarding 35
winding
served by I4
resistor
will both
32 included
be open.
in theThe.
holding
purpose
cir
cuit is to compensate either wholly or partly, as
desired, for the resistance of those turns of ‘Wind'
i-ng I2‘ which are excluded when the holding .cir
cuit is effective.
'
, When’ a train enters the section, the shunt
formed by the wheels and axles of the train will
considerably reduce the current which traverses
winding II and the upper portion of. winding
I2iin the holding circuit. Accordingly, the flux
in‘ cores 6 and 8‘ will rapidly decrease, but due
to the presence of the short-circuited winding
l3, the decrease of ?ux in the magnetic circuit
of cores 6 and ‘I will be less‘ rapid than in the 50
corresponding magnetic circuit of cores 8 and ‘I.
‘
There will, therefore, be present a magnetomo
tive force due to the magnetic circuit of cores 6
and ‘I which‘will oppose the flux in the magnetic
circuit of cores 8“ and ‘I, which magnetomotive 55 V
2,124,629 '
‘force will drive the flux in the left-hand mag
shunting conditionof ,the apparatus, in readi
’ net to a lower value than would occur merely
ness for the entry of a succeeding train into the
by virtue of the decrease in current of winding section.
I
l2. As a result, armature [5 of the left-hand '
Referring to Fig. 2, the apparatus‘shownin
magnet will release at a higher value of train this ?gure is essentially the same as in ‘Fig. 1,
shunt resistance than it would without the op
with the exception that the circuit for the sec,
posing effect of the?ux in the right-hand mag
ondary relay S includes a front contact 39--40
net, and will thus provide a higher degreev of of the left-hand magnet of relay R. The~a_d—
shunting’ sensitivityv than is provided in the 'vantage of this arrangement is that a quicker
usual. and well-known , primary-secondary relay
release of relay S will be obtained by virtue of
It will be apparent that Winding w the fact that armature ‘I5 is ?rst to .releas'e,~so
l3 has a discriminating effectvbetween a slow that the signals will respond more quickly to
decrease in energization'of relay R such as oc
the entry'of a train into the section.
curs when the,‘ ballast resistance decreases, and
In this?gure, the circuit for relay S mayor
a relatively rapid decrease, in energization such may not be carried ‘over the contact I9—-2I of
as occurs when a train enters the section. Ac
the'right-hand magnet, as desired. If relay S is
cordingly, winding I3 is effective in improving a standard relay which does not have slow pick
the shunting sensitivity of relay R:by raising the up characteristics and if the retarding coil 14 is
' release value of armature I5 and inaccelerating not used, then it may be ‘desirable to include
20 the release of this armature only under the train
both contacts 39-4!!! and l9—2l in the circuit.
shunt condition, this winding being normally in
for relay S, so asv to time-delay the pickup of
'
10.
‘
combination.
active'during changes'in ballast resistance.
the relay.
As soon as armature l5 releases, front con
V
15
20
In this manner, an operation equiva- _
lent to that of Fig. 1 with an inherently slow.
tact. l8—~2l) will open and will interrupt the cir
pick-up relay S may be obtained. By usinga 1 a
25 cuit for both windings II and I2, whereupon ' slow pick-up relay, however, the contact |,9-—2l
armature ll’ of the right-hand magnet will
quickly release.
will open
the
The release > of armature I‘!
circuit a for
relay
S _ at
con
tact l9—2l, releasing this relay and closing
30 the retarding winding 14 aswell as the pick-up
circuitfor relay R. The'pick-up circuit may be
may be completely eliminated, the pick-upcir
cuit for relay S being then carried over contact’
' 39—60 alone.
-
'
A further difference between Figs. 1 and 2 is
that in the latter ?gure the wiring for the pick
up and holding circuits is slightly rearranged
traced from rail 2, winding ii, wire 35, back con
so as to eliminate the extracontact 24—25 of
tact 26-21 of relay S, wire 31, full winding l2, relay S. In all other respects, however, the pick
wires 33 and 38, back contact 2,4—251of relay 8;. up and holding circuits for relayv R are/the same
‘and Wire‘ 35, to rail l. Preferably,’ the windings - as in Fig. 1, and will be obvious from the draw
ii and I2 will each have the ,same number of ' ing without further explanation.
7.
~ "
turns so that the right-hand and left-hand mag
It will be apparent that" the improvement in
nets .may be similarly or interchangeably de-‘ shunting sensitivity of relay R which I obtain
signed. If desired, the windings 7H" and I2 may is .due to two factors, namely,'a higher release.’
of armature l5 by virtue of the opposing mag
40 be replaced by a, single windingipositionedon
the common core‘ 7 and supplying the necessary netomotive force resulting from the unbalance
?uX to they two magnetic circuits. By suitably between the ‘right-hand and left-hand magnets
tapping the single winding, aholding circuit of at the time the track‘ is shunted, and a higher
a decreased number of turns,rsimilar to'that release of this armature due to the decreased
ampere-turn magnetization of the relay when 45
.45 for the pair of windings II and I2 .may be ob
tained.
.
w
e
The reason for equipping core ‘8 with a re-_
tarding winding [4 which‘ is similar to winding
. IS on core 6 is to provide similar conditions dur
ing pickup for both magnets so that at this time
both cores 6 and 8 will havethe same number
of short-circuited turns‘ as well as the same
number of operating turns. ‘Accordingly, when
, a train leaves the section, both armatures i5
55 and I1 will become attracted at about the same
time, although this'condition is not essential from
the standpoint of operativeness. That is, wind
ing, I74. may be dispensed with, if desired, pro
the’ holding circuit is effective. ,However, in
order to realize the advantages of my‘invention
it is not essential that the normal energizing
circuit for relay R include a resistor and exclude
a portion of the operating winding, or thatthe
holding ampere-turns be decreased, so that the
secondary‘ relay S may be dispensed with entire
ly,,if desired. That is, the full turns of both
windings I ll and I2 may be used not only at pick
up, but also during the normal holding operation
of the relay. One manner in which the effect of
fewer holding ampere-turns-‘may be obtained
without actually reducingthe number of turns
- vided the apparatus is so proportioned that a
is by making theenergized air gap at armature
I5 greater than the energized airgap at arma
60 prior pickup of one armature IE or I‘! will not
prevent the other armature from picking up.‘ ture H, the two air gaps at pickup being sub
Under certain conditions; as Will'be explained stantially the same. ‘Accordingly, the pick-up
more fully in connection withFig. 2, it may be ' ‘value for armature [5 can be made the same as
advantageous to eliminate winding [4 in order in the arrangement using the secondary relay
that armature l5 will be ?rst to pick up, thus
55
S.
On account of the unequal’ air gaps at full
delaying the'pickup ofarmature I1 and introduc
stroke, however, the ?uxes in the right and left
ing a corresponding delay in the pickup of , hand magnets will also'be unequal, the flux in
relay S.
.
'
the right-hand magnet being the greater of, the
When the section becomes unoccupied, relay two, so that armature I5 will have its release
70 R will pick up and the closing of contact I8—20 point substantially raised. By properly adjust
will reestablish‘ the holding circuit previously ing this ?ux diiference, armature l5 may be
traced. Also, the closing of contact l9—2l will brought as close to the release point whena given
cause relay S to pick upwhich will, in turn, open shunt is applied to the track, as though a'hold
7.; the pick-up circuit for relay. R and the circuit ing circuit of decreased ampere-turns were used.
is for winding I4, thereby restoring the sensitive Although I have herein shown andidescribed
66
3
2,124,629
only two forms-of railwaytrack circuit apparatus
embodying my invention, it ‘is understood that
various changes and modi?cations may be made
therein within the scope of vthe appended claims
sensitivity of a track circuit comprising, in come
bination, two magnetic circuits for said ‘track re
lay each including a common magnetic path and
each adapted to be energized from the track, a
without departing from ‘thespiri't and scope of
control armature for said track relay associated
my invention.
with one of said magnetic. circuits, a short
‘
1
I
Having thus described ‘my invention, what I
claim is:
'
1. In combination with a section of railway
track and a source of current connected across
the'rails of said section, a primary relay having
a ?rst and a second magnetic circuit each in
cluding a common magnetic path, means asso
ciated with said ?rst magnetic circuit for retard
15 ing the flux decay therein when said track section
circuited winding associated with the other of
said magnetic circuits for retarding the, flux'decay
therein when the track becomes shunted to there
by accelerate the ?ux decay in said one magnetic
circuit and so to accelerate the release of said
armature.
.
"
10v
'
6. A track relay for improving the shunting
sensitivity of a track circuit comprising in com
bination, a ?rst and a second‘magnetic circuit for 15
becomes shunted to thereby accelerate the ?ux said track relay each including a common mag
decay in said second magnetic circuit, a secondary netic path and each adapted to be energized from
relay, an energizing circuit for said secondary the track, a ?rst and second armature associated
relay including a contact of said primary relay, a ' respectively with said ?rst and second magnetic
pick-up circuit for said primary relay connected. circuits, means associated with said ?rst mag 20
across the rails of said section and including a ' netic circuit for-retarding the ?ux decay therein
contact of said secondary relay as well as the full
when the track becomes shunted'to accelerate the , '
operating winding of said primary relay, and a
?ux decayin said second magnetic circuit and
holding circuit for said primary relay controlled
25 by a contact governed by said second magnetic
?rst armature‘releases, and signaling apparatus
circuit and including only a portion of the op
erating winding of said'primary relay.
'
2. In combination with a section of railway
track and a ‘source of current connected across
30 the rails of said section, a primary relay having a
?rst and a second magnetic circuit each including
a common magnetic path, means associated with
said ?rst magnetic circuit for retarding the ?ux
decay therein when said track section becomes
shunted to thereby accelerate the ?ux decay in
said second magnetic circuit, a secondary relay,
so to release said secondarmature before said
controlled by a said two armatures.
'7. In combination’ with a section of railway
track and a source of current connected across
the rails of said section, a track relay having two
magnetic circuits each including a common mag‘
netic path, a circuit including the rails of said
section for energizing said two magnetic cir
cuits, an armature associated with each of said
magnetic circuits, and means associated with
one of said magnetic circuits'e?ective when the
a
track section becomes shunted by a- train for
accelerating the release of the armature .asso
an energizing circuit for said secondary relay in
cluding a contact of said primary relay, a pick-up ciated with the other of said magnetic circuits. v
. 8. In combination with a section of railway
circuit for said primary relay connected across
40 the rails of said section and including a contact } track and asource of current connected across 40
the rails of said section, a track relay having two'
of said secondary relay as well as the full operat
ing winding of said primary relay, a resistor, and magnetic circuits each including a common mag
a holding circuit for said primary relay controlled netic path, a circuit including the rails of said
by a contact governed by said second magnetic section for energizing said two magntic circuits,
an armature associated with one of said magnetic 45
,3 circuit and'including only a portion of the op
erating winding of said primary relay and said circuits, and means associated with the other
of said magnetic circuits effective when said track
resistor.
,
3. A track relay for improving the shunting section becomes shunted by a train for accelerat
ing the release of said armature.
.
sensitivity of a track circuit comprising, in com
9. In combination with a section‘ of railway
bination, two magnetic circuits for said track re
lay each including a common magnetic path and track and a source of current connected across
each adapted to be energized from the track, a the rails of said section, a track relay having two
control armature for said track relay associated magnetic circuits each including a common mag
with one of said magnetic circuits, and means netic path, a circuit including the rails of said
section for energizing said two magnetic circuits, 55
in LA associated with the other of said magnetic cir
cuits and discriminating between a relatively slow an armature associated with one of said mag
decrease in energization of the track relay such netic circuits, and a short-circuited winding as
as occurs due to a decrease in ballast resistance
sociated with the other of said magnetic circuits
and a relatively rapid decrease in energization effective when said track section becomes shunted
of the track relay such as occurs due to a train by a train for retarding the ?ux decay in said 60
shunt for accelerating the release of said arma
other magnetic circuit so as to accelerate the ?ux
ture when said track relay becomes shunted.
decay in said one magnetic circuit and expedite , ,
4. A track relay for improving the shunting the release of said armature.
V
sensitivity of a track circuit comprising, in com
10. In combination with a section of railway
bination, two magnetic circuits for said track track and a source of current connected across
relay each including a common magnetic path
and each adapted to be energized from the track, the rails of said section, a track’ relay having two
a control armature for said track relay associated magnetic circuits each including a common mag
with one of said magnetic circuits, and means netic path, a circuit including the rails of'said
section for energizing said two magnetic circuits, 70
associated with the other of said magnetic cir
cuits for retarding the ?ux decay therein when an armature associated with one of said magnetic
the track becomes shunted to thereby accelerate circuits, means associated with the other of said
the flux decay in said one magnetic circuit and
so to accelerate the release of said armature.
75
5. A track relay for improving the shunting
magnetic circuits e?ective when said track sec
tion becomes shunted by a train for accelerating
the release of said armature, and means con 75
4
2,124,629
trolled by said armature for improving the. shunt
‘netic path, means receiving energy from the rails ‘ r
ing sensitivity of said track relay.
of said section-for setting up, aiding fluxes in
said two magnetic-circuits, an armature asso-_'
_
'
11. In combination with a section of railway
track and a source of current connected across
the‘rails of said section, a track relay havingtwo
magnetic circuits each including a common mag
' netic path, a circuit including the rails of said’
section for‘energizing said two magnetic circuits,
ters said section for aiding the release oflsaid
an armature associated with each of said mag
armature.
'10 netic circuits, means associated with one of said
magnetic circuits effectivewhen the track section
becomes shunted by a train for acceleratingthe
release of the armature associated ,Withthe other
of said magnetic circuits, and means controlled
by both said armatures for improving the shunt
ing sensitivity of said track relay.
,
12. In combination with a section of'railway
track and a source of current connected across
the rails of said section, a track relay having a.
?rst and a second magnetic circuit each including >
a common magnetic. path, a circuit including the
;rails of said section for energizing said ?rst and
said second magnetic'icircuits, a?rst and a second
armature associated respectively with said ?rst
and said second’ magnetic circuits, means asso
ciated with said'second magnetic circuit for ac
celerating the release of said ?rstarmature upon
shunting of said track section, an auxiliary relay
7 controlled by said ?rst armature, and means con
trolled by said auxiliary relay andreffective when
39 the
shunt is removed from said track section for
equalizing the pick-up time for said ?rst and
second
armatures.
,-
v
I
.
'
g
. 13. In ccmbinationwith a section of railway
.35
ciated Withone of said 3magnetic circuits, and .
means associated with the other of said magnetic‘.
circuits effective upon a rapid decrease of the
energy received from said rails when, a trainen
track and a source of current connected across
the rails of said section, a track relay having two
magnetic circuits each including a common mag
\
.
_
I.
-
'
t
'
i
14. A track relay for railway signaling track
‘circuits comprising, in’ combination, twomag
netic circuits for'said trackrelay eachincluding
a common magnetic path, means for setting up
aiding ?uxes in said two magnetic circuits,'and
means associated with one of said magneticfcir
15
cuits effective upon a relatively rapid decrease ‘of -
?ux therein for acceleratingthe decrease of flux
in the other of said magnetic circuitsto thereby
improve the shunting ‘sensitivity of said track
20.
I relay.
v15; In combination, with a ‘section of railway
track and a vsource offcurrentfconnected across
the rails of said section, a track relay having ‘two
magnetic circuits each ‘including 'a commonmag
netic path, means receiving energy from the rails 25' .
of said section for setting up aiding fluxes in said
two magnetic circuits, an armature associated >
with one of' said vmagnetic circuits, and means
associated 'withthe other of 'said, magnetic: cir-.
cuits and discriminating between a‘ rapid decrease
in the energy received from said rails such as
30'
occurs when a train‘enters the section and a slow -
decrease in said‘energy due to a decrease in bale
last resistance for, modifying the release value of
said armature.
‘-
,
_
,
BERNARD E. O’HAGAN.
Документ
Категория
Без категории
Просмотров
0
Размер файла
756 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа