close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2409721

код для вставки
ì Oct. 22, 1946.
A. J. soRENsEN
2,409,719
APPARATUS FOR SELECTIVE CONTROL AND INDICATION SYSTEMS
Filed oct. 27, 1943-
_ 2 sheets-sheet 1
» HIS
Af'roRNl-:Y
i
0d. Z2, 1946.\
A. J.- soRENsEN
2,409,719
APPARATUS FOR SELECT-IVE CONTROL AND INDICATION SYSTEMS
Filed Oct.' 27, 1943
125 .
„45 52
I
2 Sheets-Sheet 2
D]
GZ
e
Perma/7
/Va
ï
67
I
2.
ML]I
|
N54l
lIEIÃQW
l
ff'
SC4X4PI/4pq
i
"_i
IZ
m
INVENTOR
H15' 'ATTORNEY
Patented `Oct. 22, 1946
¿italië
2,40 9,7 19
APPARATUS FOR SELECTIVE CONTROL AND
ÃNDICATION SYSTEMES
Andrew .lL Sorensen, Edgewood, Pa., assigner to
The Union Switch. & Signal Company, Swiss
vale, Pa., a corporation of Pennsylvania
Application Getober 27, 1943, 'Serial No. 507,877
4 Claims. (Sl. 177-353)
2
l
My invention relates to apparatus for selective
control and indication systems, and more partic
ularly to apparatus to indicate at which one of
invention will
progresses.
appear
as
the
speciñcation
The above features, objects and advantages
embodying my invention are accomplished
a plurality of devices a given condition occurs
and to control that device in response to such Ul through a novel line circuit arrangement, an im
indication.
Individual control and indication of a group
of devices or electric equipments is frequently ac
complished through a, single line circuit by use
of alternating currents of different frequencies.
In such systems reliability of selection, simplicity
of apparatus and circuits, freedom from opera
tion due to shock excitation and foreign current
proved indication apparatus and control means
for each of a plurality of electric equipments or
devices, and a plurality of oscillators of diñer
ent frequencies located at a control office remote
from the devices.
The line circuit is a two conductor circuit ex
tending from the central oiiice to the different
devices in multiple, the circuit may comprise tWo
and the resetting and testing of the apparatus
metallic conductors or one metallic conductor and
are essential features.
Accordingly, a feature of my invention is the
the ground path. This line circuit is proportioned
to have the characteristics of a circuit of a pre
provision of improved apparatus to selectively
determined length. For locations where the 'dis
tance between the oiîìce and the devices is less
control and indicate the conditions of a relatively
than such predetermined length suñicient ar
large group of devices.
Another feature of my invention is the provi 20 tiñcial impedance is inserted in the line conduc
tors to provide the line circuit with the char#
sion of novel and improved apparatus to detect
acteristics of the circuit of predetermined length.
magnetic ñelds and the presence of magnetizable
The indication apparatus for each device in
bodies and to indicate at a remote point such
cludes an oscillator, ñlter and relay means at the
detection.
Still another feature of my invention is the pro M Cl oiiice, and a detector-ampliñer and shunt circuit
at the device. The indication oscillator is of a
vision of indicating apparatus of the type here
frequency preselected to be individual to the de
involved incorporating novel means for automat
vice, and it is connected to the line circuit through
ically maintaining a preselected adjustment and
the respective ñlter and relay means. The ñlter
balance of the apparatus over a long period of
time.
Again, a feature of my invention is the pro
vision of indicating apparatus of the type here
contemplated incorporating novel means Where
With an unbalance and change in the Working
value »of current are avoided when changes take
place in the voltage of the current source.
A speciñc feature of my invention is the pro
vision in control and indication systems for sub
marine mine fields oi improved apparatus to
detect the approach of a vessel and to indicate
at a shore oñice which mine oi the field is ap
proached.
is proportioned for the circuit including the oscil
lator, filter, relay means and the distributed ca-.
pacitance of the line conductors with respect to
ground rto be tuned to resonance at the frequency
of the oscillator. In this Way the oscillator nor
mally supplies a relatively large line charging or
leakage current. Also the several indication oscil
lators, one for each device, can be connected in
multiple across the line circuit with each func
tioning independently of the others. The relay
means is the diiîerential type, such as, for ex
ample, a two Winding neutral relay. One Wind
ing is interposed in the connection of the oscil
A further speciñc feature of my invention is
the provision of improved apparatus for selective
lator through a full Wave rectifier and a given
citation or to variations in the voltage of the
supply source is minimized.
ñrst winding with the result the resultant ener
energization of the relay is effected by the normal
indication, control and ñring of the mines of a 45 charging current. The second winding is con
nected to a local battery to provide an energiza
submarine mine field, and wherewith all current
.tion that is opposite and substantially equal to
sources are located at a shore oiîice.
that normally created by the first Winding and
Also a feature of my invention is the provision
the resultant energization of the relay is ap
of novel and improved ñring apparatus for sub
marine mines incorporating novel means where 50 proximately zero. A preselected reduction in the
charging current will be followed by a corre
With the probability of the firing of a, mine due to
sponding reduction of the energization of the
energy from an improper source or to shock ex
gization of the relay Will be increased and the
Other features, objects and advantages of my 55 relay will he picked up to control an indicator o1'
'2,409,719
cs
Each detector-ampl‘iñer of the indication ap
paratus is designed to respond to a magnetic field
regenerative winding on the center leg o-f the Core.
These two reactor circuits are adjusted for the
currents flowing therethrough to be as nearly the
same as possible, but they become unbalanced
and includes two magnetic cores of like construc
when current flows in the windings of the pre
any other circuit.
Such reduction is at times
effected in a manner to appear shortly.
tion and arranged in parallel relation with like
windings mounted one on each core.
Two like
magnets, preferably permanent magnets, are dis
posed one along side of each of said cores to cre
ate magnetic fluxes o-f the same density in each
core so that the impedances of the windings are
viously mentioned output circuit, because one
winding of the output circuit biases the reactance
of its core in one sense and the other winding
of the output circuit biases the reactance of its
core in the opposite sense. The detector relay is
connected to these two balanced reactor circuits
to be deenergized under the normal balanced con
dition and to become energized due to an unbal
so that fluxes thread the two cores in opposite
anced condition between the currents ñowing in
directions. The windings of these two cores are
connected to a source of alternating current and 15 the reactor circuits. It follows that in both forms
the same. The two magnets are poled oppositely
substantially equal currents flow in the windings
due to their impedances being equal. I may pro
vide an adjustable reactance in the connection
to these windings as an aid in equalizing the
normal value of current flowing therethrough.
These two windings of the detector element are
included in different branches of a balanced cir
of the invention the detector relay is deenergized
when no extraneous magnetic field or magnetiza
ble body is present, but becomes energized in re
sponse to the presence of a magnetic ñeld or
magnetizable body.
Each shunt or selector circuit includes a ñlter
and is connected across the line circuit through
a front contact of the detector relay governed
cuit network, preferably of the bridge circuit type.
by the respective detector-ampliñer, and each
A relay is connected to this circuit network to be
operated when an unbalanced condition is created 25 such ñlter is tuned to resonance at the frequency
of the indication oscillator for the same device.
and unequal currents are made to now in the de~
Thus, when a detector relay is operated and the
tector windings.
respective shunt circuit is connected across the
An extraneous magnetic field about this detec
line circuit, the line circuit is detuned for that
tor element er the approach of a magnetizable
body near the element tends to add to t-he flux 30 particular indication frequency and the magni
tude of the charging or indication current sup
threading one core and to subtract from that
plied by the respective oscillator is materially re
threading the other core. Such a change of the
duced. Such reduction in the indication current
magnetic fluxes causes variations in the imped~
correspondingly reduces the energization of the
ances of the two windings and in turn in the
first winding ofthe respective indication relay
value of the currents flowing therethrough, and
and that relay is operated or picked up due to
the relay is operated by such unbalanced condi
the energization of the local or second winding of
tion. Preferably, the arrangement is such that
the relay as explained hereinbefore. By the filter
as long as the currents flowing in the two wind~
of each shunt circuit being tuned to resonance
ings are equal, the relay is deenergized, but that
an unbalanced condition of the currents causes 40 at the frequency of the respective indication oscil
lator, each shunt circuit when closed causes little
the relay to become energized.
or no change in the normal charging or indica
In one form of the invention the balanced cir
tion current supplied to the line circuit by the
cuit network is a bridge circuit of the well-known
other indication oscillators.
Wheatstone Bridge arrangement.
The two
A power oscillator at the oñìce is permanently
windings of the detector element form two
connected to the line «circuit to supply a power
branches of this bridge circuit, and two other
current of a given preselected frequency. Each
windings constructed to be like the detector ele
detector-amplifier has a supply circuit connected
ment windings and mounted one on each of two
to the line circuit through a filter tuned to pass
other like cores disposed one adjacent one mag~
net of the detector element and one adjacent the 50 current only of the frequency Iof the power os
cillator. '
other magnet of the detector element, form the
The ofñce is further provided with an operat~
other two branches of the bridge circuit. That is,
ing oscillator common to the group of electric
the four arms of this bridge are as nearly the
equipments or devices, and an individual control
same as possible and have equal values of current
oscillator for each equipment. The operating os
flowing therethrough under the balanced condi
cillator is of a distinctive preselected frequency
tion. The relay is preferably a direct current
and each control oscillator supplies current of a
relay connected across opposite corners of this
frequency preselected to be individual for the
bridge circuit through a full wave rectifier.
respective equipment. The office is provided with
In another form of the invention, the two
windings of the detector element are included 60 switching means that permits the operating os
cillator and any one or any group of the control
one in each of two balanced detector circuits to
oscillators .to be connected to the line circuit.
which an output circuit is connected in such a
The control and operating means of each equip
manner that the current flowing in the output
ment includes a control relay connected to the
circuit is proportional to the difference between
the currents flowing in the detector circuits. This 65 line circuit through a filter tuned to pass `cur
rent only of the frequency of the respective con
output circuit includes two windings, one mount
.trol oscillator. The operating unit of each equip
ed on the center leg of each of two sa'turable
ment is connected across the line circuit through
reactors each of which reactors has a three
a contact of the associated control relay and a
legged core structure, and current flowing in this
output circuit governs the flux density of the 70 filter tuned to pass current only of the frequency
of .the operating oscillator. ln this way, control
core structure o-f each reactor. Each of these
current and operating current are required for
reactors is provided with a balanced reactor cir
operation of an equipment and the probability of
cuit which comprises alternating current wind
operation of an equipment due to an extraneous
ings mounted one on each of the outside legs of
the core structure, a rectifier and a direct current 75 current is remote.
2,409,719
5.
.
Each control `relay governs a circuit for unbal
ancing the condition of the detector-amplifier for
test purposes. I also provide each detector-am
pliiier with circuit `arrangements for automatical
ly adjusting its balanced condition and an un
balanced condition of its circuits due to varia
tions in .the sourcerofsupply, as well as variations
due to other causes, is avoided.
I shall describe two forms of apparatus em
6
others of which are connected to the line circuit
only at times. These voscillators may :be of any
of the well-known types and they are shown
conventionally lfor the sake of simplicity. Each
oscillator is constructed to supply current of a
preselected frequency which is `different for each
oscillator, and preferably each oscillator is nor
mally active. For example, an oscillator FIv is
connected-across the line wire LI and a wire I2
bodying my invention, and shall then point out 10 connected to ya ground electrode I3 through a
the novel features thereof in claims.
In the accompanying drawings, Figs. 1 and 2
are diagrammatic views showing a ñrst and a
second form, respectively, of apparatus embody
ing my invention when used to control and in
dicate the mines of a submarine mine field.
In each of the two views like reference char
transformer Tl and a filter comprising a re
actor XI Yand a condenser CI. Oscillator FI de
livers a power current to the line circuit for sup
plying lpower to the equipments of the mines to
15 be described hereinafter.
This power current is
of` a preselected frequency, and which frequency
I shall call vfrequency fI. Filter XI-CI is tuned
to pass current of the frequency of fl, and to
acters are used to designate similar parts.
vsiïibstantially suppress all other frequencies. It
It is understood that lthe invention is not lim
ited to submarine mine fields, and .this one ap 20 follows 'that the line circuit is excited at all times
by this power current.
plication serves to illustrate the principle of the
Oscillators F2I and F22 are indication oscilla
invention.
tors for mines MI and M2, respectively, and each
Referring to Fig. l, the reference characters
of -these indication oscillators supplies an indica
MI and M2 designate a first and a second mine.
respectively, of a submarine mine field which 2-5 tion current of a frequency made individual for
the respective mine, and I shall refer to the fre
would include a suñicient number of mines to
quencies of oscillators F2I and F22 as being of
properly protect a harbor. Only the two mines
are shown since the mines are alike and two are
the frequencies fZI and j22, respectively. Os
cillator F2I is connected across the line circuit
suiñcient .to fully illustrate my invention.
The reference character OF designates a 30 through a transformer T2I, a ñlter comprising a
reactor X2! and a condenser C2 I, and a full Wave
shore oflice in the Vicinity of the harbor protected
rectifier I4', an indication relay IRZI having one
by this mine field, and from which oiiice the
winding I5 connected to the direct current ter
mines are controlled and fired. A transmitting
minals of the rectifier I4.
`
or line circuit is provided between the oñice OF
The filter X2 I -C2I is proportioned so that the
and .the mines. Preferably -this line circuit is a 35
circuit comprising transformer T2I, filter C2I--two conductor circuit comprising a single con
XZI, winding I5 of relay IRZI and line conductor
ductor cable LI as one side of the circuit and the
LI with its distributed capacitance is tuned to
ground path as the other side of the circuit, al
resonance at the frequency of oscillator F2 I, and
though a metallic conductor may be used in place
of the ground path. The conductor LI extends 40 oscillator F2! normally supplies a relatively large
line charging current. Winding I5 of relay IR2I
from the office to a distribution point DP located
is thus normally energized by this charging cur
in a waterproof housing anchored in the harbor
rent. Indication relay IRZI is provided with a
and from which distribution point the line `circuit
second winding I6 connected to a convenient
extends through cables in multiple to each mine,
single conductor cables MLI and ML2 extending 45 source of current, such as a battery, the terminals
of which are indicated at B and C. Windings
from distribution point DP to mines MI and M2,
i5 and I6 oppose each other and are proportioned
respectively. Fuses II! and Il are interposed in
so that when the normal charging current flows
the conductors MLI `and ML2, respectively, at the
in winding I5 the resultant energization is sub
distribution point, for reasons to appear here
This line conductor LI possesses distributed ca
pacitance with ground and to visualize such
50 stantially Zero and no tractive effort is exerted
on the armature of the relay, but When the
charging current ' flowing through winding I5
capacitance a Condenser CL is shown by dotted
decreases the resultant energization is increased
inafter.
l
and the relay picked up to close front contacts I1
lines in Fig. 1 as connected between the con
ductor LI `and ground but it is to be understood 55 and 20. With front contract I1 closed, an in
condenser CL represents no physical piece of
apparatus. The distributed capacitance of line
dicator lamp I8 is illuminated from the B-C
current source. A resistor I9 is preferably in
conductor LI as Well as its impedance will vary
cluded in the connection to the battery to aid in
adjustment of relay IR2I.
for different lengths and other conditions, Pref
erably the line circuit is arranged for the dis 60 Indication oscillator F22 is connected to the
line circuit through a transformer T22 and a
tributed capacitance and impedance to be that
ñlter XE2-C22 and controls an associated in
for a. predetermined length of line, such as, for
dication relay 1R22 in the same manner that
example, eight miles. To take care of cases where
the conductor LI is less vthan the predetermined
oscillator F2I controls the relay IR2I, and the
description need not ibe repeated except to point
length, .the office is provided with a unit LU in
out that the circuit comprising transformer T22,
cluding resistance, inductance and capacitance
and having two mating series of terminals I--2,
ñlter X22-C22, relay 1R22 and line conductor LI _
3_4 and 5_6 with which conductor LI and the
with its distributed capacitance is tuned to reso
office connection can be connected to insert suf
nance at the frequency f22 and oscillator F22
iicient impedance to give the line circuit the im 70 normally supplies a relatively large line charging
pedance equal to that of the predetermined
current.
length.
i
The oince apparatus includes a number of
different oscillators, some of which are per
manently connected across the ~line circuit, and
Oscillators F3I and F32 are control or arming
oscillators for mines MI and lM2, respectively,
and each of these oscillators supplies current at a
75 frequencyvpreselected to be» individual for 4the
2,409,719l
8
respective mine, and I shall asume that oscilla
tors F31 and F32 supply current of the fre
quencies f3! and f32, respectively. Oscillator F3|
is connectedacross the line circuit through a
transformer TSI, a filter comprising a reactor
X3i and a condenser C3|, and two alternative
paths, one of which includes a manually opera
fluxes being substantially the same in each core
due to the similarity ofthe magnets and size
and spacingof the cores. The fluxes threading
cores 25_and 26 are, however, of the opposite
direction from those threading the cores 21 and
28. Windings 29, 30, 3| and 32 are placed on
cores 25, 26,21 and 28, respectively, and these
windings are made> as nearly alike as possible.
ble switch SWI, and the other of which paths in
It follows that the impedances of the windings
cludes front contact 23 of indication relay IR2|
and a switch 2|. The filter X3|--C3| is tuned 10 are almost if not wholly identical.
Windings 29, 30, 3|. and 32 are connected to
to pass current of the frequency f3| and to sup
form a bridge circuit of which windings 29
press other frequencies. Hence, when either the
and 3| form one parallel path and windings
switch SW1 is closed or the switch 2| is closed
and relay IR2| is picked up to close front contact
33 and 32 form the other parallel path con
20, control current suitable for controlling or
nected between termin-als 35 and 36 of a current
arming rmine Ml is supplied to the line circuit.
source. Terminals 35 and» 36 are the output ter
minals of a filter FTI, the input terminals of
As will appear hereinafter, the closing of switch
2| conditions the office apparatus for automati
which are connected across the line circuit by
cally arming the mine MI in response to the
vone input terminal being connected to conduc
tor ML| and the other input terminal being
approach of a vessel to that mine, but when
connected to ground electrode 33 through wire
switch 2| is open, the mine MI is armed Inan
ually through switch SW| in response to such
34. Filter FT| is tuned to pass current only of
indication. Control oscillator F32 is connected
the frequency fl and hence current from power
oscillator FI is applied to the windings of the
tothe line circuit in a manner similar to oscila
tor F3 |, as will be clear by an inspection of Fig. 1, 25 detector at the opposite corners of the bridge
a transformer T32 and a ñlter comprising reactor
X32 and condenser C32 being interposed in the
connection of oscillator F32, and filter X32--~C32
being tuned to pass current only of the frequency
f32.
An operating or firing oscillator F4 at the oñìce
supplies current that is used for firing the mines,
circuit. Detector relay RI is connected across
the other opposite terminals 31 and 38 of the
bridge circuit through a full wave rectifier 39.
It is apparent that normally the relay RI is de
30 energized because of the balanced condition of
the bridge circuit.
If a vessel approaches mine M|, the presence of
its steel portions creates a magnetic field that is
substantially uniform and is of a given direc
and which current is of a preselected frequency
different from that of the other oscillators, and
which frequency I shall assume to be ffl. Oscil v35 tion. This extraneous iield causes the fluxes
lator F4 is connected across the line circuit
threading cores 25 and 26 to be decreased and
through a transformer Td, a filter comprising
the fluxes threading cores 2ï and 28 to be in
a reactor X@ and a condenser Cé and two alter
creased or vice versa, -and consequently the two
opposite arms of the bridge, windings 29 and
native paths, one of which includes a manually
operable switch SWA and the other of which 40 3S for example, have their impedances increased,
paths includes a contact 22 controlled by the
and the other opposite arms of the bridge, wind
indication relays of the system. It is to be noted
ings 3| and 32, have their impedances decreased
that the oiìce is provided with an indication
oscillator and a control oscillator for each mine
of the mine ñeld, but that the oscillators FI and
or vice versa.
This results in an unbalanced
condition for the bridge circuit and relay Rl
is energized due to the difference in potential
F4 are common for the field.
between the terminals 31 and 38. It is clear,
Each mine is provided with an electric equip
therefore, that windings 29 and 3|, for example,
with their respective cores 25 and 21, together
ment that has an indication portion which detects
with permanent magnets 23 and 24 form a de
and indicates the approach of a vessel, and a
control portion which arms and fires the mine. 50 tector element that is influenced by a magnetic
field and which detector element in conjunction
These mine equipments are alike, except for the
with the other windings and cores of the bridge
tuning thereof and a description of one- equip
circuit, provide high sensitivity in the control
ment will suffice for an understanding of all.
Referring to mine M|, its equipment comprises
of relay RI.
_
,
Detector relay Rl controls a shunt or selector
circuit path connected across the line circuit,
and which circuit path extends from conductor
R3 and a detonator Di, together with filters
ML| through a filter comprising a reactor 2|X
Iand circuit connections.
and a condenser 2 |C, and front contact 60 of relay
The detector-ampliñer DA includes two per
marient bar magnets 23 and 24 made as nearly .60 Rl to ground electrode 4|. The filter 2|X----2|C
is tuned to pass current only of the frequency f2|,
alike as possible. These magnets are arranged
that is, it is tuned to resonance of the frequency
parallel toeach other and are oppositely directed
of the current supplied to the line circuit by the
as indicated by the letters N and S placed on
indication oscillator F2 | associated with mine MI .
their poles. Two magnetizable cores of the bar
Consequently, when a vessel approaches mine M|,
type are disposed alongside each of the per
to bring about energization of relay RI, the cir
manent magnets, cores 25 and 25 being thus asso
cuit path including ñlter 2|X--2|C is connected
ciated with magnet 23 and cores 2l and âß'being
across the line circuit. The connecting of the
associated with magnet 2&3. These cores are made
shunt circuit across the line circuit detunes the
as nearly alike as possible of material of very
high permeability, such as Permalloy, and the 70 line circuit as far as oscillator F21 is concerned
and the current supplied by oscillator F2| is
cores are spaced as nearly the same as possible
materially reduced, for example, fifteen per cent
with respect to their magnets. It is clear that
or more. This reduces the energization of Wind
magnetic flux from magnet 23 threads cores 25
ing ~|5 of relay 1R22 and the relay is picked up
and `2li, and magnetic flux from `magnet 24
due to local winding I6, with the result the indi
threads cores 2Tand 28, and density of such
as essential elements, a detector-ampliiier DA, a
detector relay Rl, a control and arming relay
2,409,719
9
cator lamp I8>` is illuminated to indicate to the
oñlce operator the approach of the vessel to the
mine MI.
Arming relay R3 is connected across the line
circuit through a filter F’I’SI, relay R3 being a
direct current relay connected to the output side
10
to the line Circuit simultaneously. with both
such currents on the line circuit, the arming re
lay R3 for mine MI is picked up, after which the
tube VI is rendered conductive and the detonator
DI is íired. `
'
If automatic firing of the mine is to be effected,
the switch 2I would be set at its closed position.
of the ñlter through a rectifier ¿l2 and the input
Then when indication relay IRZI is picked up in
side of iilter F'I‘SI being connected to conductor
response to the approach of the vessel temine
MLI and ground electrode 33. Filter FTBI is
tuned to pass current only of the frequency ÍSI. 10 MI, the closing or" contacts 2i) and 2,2 completes
the connections for oscillators FZ! and F4 to the
Consequently, when control oscillator F2I is con
line circuit, and the mine MI is ñred in response
nected across the line circuit by the closing of
to the presence of control current and firing cur
switch SWI or by the closing of switch ZI and
rent simultaneously:
front contact 2li of indication relay IRZI, the
With mine MI4 fired, the mine end of the con
control relay R3 at mine MI is energized and 15
ductor MLI becomes grounded, due to the rup
picked up to close its iront contacts 53 and M.
ture of the conductor, and the increase of power
The detonator Di is of the usual type and in
current ílowing through the fuse I0 causes the
cludes an element t5 which when supplied with
i‘use to blow so that the line circuit is disconnected
current of a given value is effective to ñre the
from the conductor MLI to the fired mine.
mine. Detonator DI is connected to the line cir
The detecting of a vessel approaching any oneV
cuit through a gas filled tube VI which in turn
of the other mines of the field, and the indica,
is excited through a ñlter FTA. Filter FTI! has
tion of such detection, together with the arming
its input side connected between conductor MLIv
and firing of the mine, would be accomplished in
and ground electrode 33 of the line circuit, and
a manner similar to that just described for mine
its output side connected between control elec
MI.
trode 46 of tube VI and ground electrode £7, the
If the equipment for mine MI is to be tested,
front contact ed of control relay R3 being inter
the operator would close switch SWI with switch
posed in the connection to ground electrode d?.
2l open. This would connect the arming oscilla
Filter FT!! is tuned to pass current only of the
frequency f4, and hence when firing oscillator F4
tor FSI to the line circuit so that the arming relay
cuit.
This causes a sudden decrease in the
terminals of the ñlter, and a series, of secondary
mine is relied upon, the operator, if he desired
to ñre the mine in response to this indication,
permeability are disposed alongside of magnets
R3 would be energized. The closing of front con
is connected to the line circuit by the closing of
tact 63 of relay R3 completes a shunt circuit
switch SW@ or by the closing of contact 22, and
across winding 32 of the bridge circuit through
the control relay R3 is picked up to close its front
front contact d3 and a resistor 52. This shunt
contact (àà, the electrode d6 of tube VI is excited.
circuit causes an unbalanced condition of the
At the same time, a voltage due to the power
bridge circuit, and detector relay RI is energized
current is impressed across anode 59 and cathode
to connect the associated shunt circuit 'path
5I of tube VI, anode 5t being connected to the
across the line circuit so that the indication cur
conductor MLI through element 45 of the detona
rent supplied by oscillator F2! is decreased to
tor DI, resistor 49 and a rectifier 4B; and cathode
5I being connected to ground electrode 33. With 40 bring aboutv the picking up of indication relay
IR2I, and lamp I8 becomes illuminated to indi
both control electrode ¿I3 and anode 5S thus ex
cate to the operator that the equipment at mine
cited, the tube VI breaks down and becomes con
MI is in an operative condition.
ductive so that current ñows through the tube
In Fig. 2, mine MI is one mine of a mine field
and this current flowing in the element 45 of the
detonator is sufficient to cause the ñring of the "= defending a harbor, and which minefield is con
nected to a shore oiîice OF through a line circuit
mine.
including conductor LI and the ground path, the
Mine M2 is shown conventionally only since its
same as in Fig. 1. The o?lice apparatus of
2
equip-ment would be a duplication of the equip
is the same as that of Fig. l, and that part of
ment for mine MI, except for the tuning of the
the description need not be repeated. Each mine
shunt circuit connected across the line circuit
of Fig. 2 is provided with an electric equipment
through a contact of the respective detector relay
to detect the approach of a vessel and to arm and
and the tuning of the ñlter through which the
fire the mine the same as in'Fig. l and the mine
arming relay is connected to the line circuit.
equipments of Fig. 2 are all alike except as to
In describing the operation of the apparatus of
their tuning, and are the same as the mine
Fig. l, I shall assume that normally, that is, when
equipments of Fig. 1, except for the detector-arn
no vessel is in the vicinity of the mine ñeld, the
pliñer.
_
apparatus occupies the condition disclosed in the
In describing the detector-amplifier of mine MI
drawings. With .the apparatus in its normal con
of Fig. 2, it is to be noted that power for this de
dition and a vessel approaches mine MI, the
detector-ampliñer DA is unbalanced in response (II) vice is supplied from the power oscillator FI
through filter FTI connected across the line cir
to the magnetic ñeld created due to the vessel and
cuit at the mine, and a transformer TM having
the detector relay RI is picked up to connect the
a primary winding PI connected to the output
associated shunt circuit path across the line cir
windings designated SI to SS, inclusive, to
charging or indication current supplied to the
which secondary windings the circuits forthe
line circuit from indication oscillator F2I, and
detector-ampliñer are connected. The detect
indication relay IRZ Il is picked up by its resultant
ing element includes two permanent bar magnets
energization due to its local winding and lamp
fill and 6I disposed parallel andoppositely di
I 8 is illuminated to inform the oiîice operator of
70 rected, and which are made as nearly alike as
the approach of the vessel to mine Ml.
possible. Two cores E2 and 63 of material of high
On the assumption that manual firing of the
would close switches SWI and SWli to bring about
the supply of arming current and ñring current
6G and 6I, respectively,Y and these cores are as
nearly alike'as possible and are spaced as nearly
the same as possible with respect to their inag-v
2,409,719
l2
Windings 64 and 65 are mounted on cores
the right-hand portion of winding A4 is adjusted
52 and ‘53, respectively, and these windings are
as nearly alike as possible. Thus it is clear that
windings 64 and 65 are of like impedances. Each
of the windings lili and 65 is included in a detec
tor circuit, the two circuits of which are bal
anced. One such detector circuit can be traced
from one terminal of secondary winding S2 of
transformer TM through winding Gli, a first
winding 65 of an adjustable reactance DE, one
so that the rectified current flowing there
through under the balanced condition of the
associated detector circuit is sufficient to put
the magnetic material of the core of reactor AR
at its most sensitive condition.
Reactor BR is made as nearly as possible like
the reactor AR, and is provided with a circuit
extending from secondary` winding S5 of trans
nets.
leg of a full wave rectifier GI , resistor Sl, a right
hand portion of a winding A4 of a saturable re
actor AR to be described later, and a second leg
of rectifier Gl to the other terminal of secondary
winding S2.
Similarly, another detector circuit
(Il.
former TM through winding BI on one outside
leg of its core, winding B2 on the other outside
leg of the core, one arm of a full wave rectifier
Gé, resistor 'il to terminal i2, and thence through
regenerative winding B3 on the center leg of the
core and another arm of rectifier G6 to the other
can be traced from one terminal of secondary
terminal of secondary winding S5.
winding Sii of transformer TM, through winding
65, winding 68 of the adjustable reactance Dl,
and Bâ are disposed for alternating flux to be set
up in the outside legs of the core, but not through
Windings Bl
the center leg which carries windings B3 and B4,
winding Bâ being a combined bias and output
winding and winding B3 being a regenerative
winding. The number of turns for the left-hand
ondary winding S4. These two circuits are made
portion of winding B4 is adjusted so that the
as nearly alike as possible, so that substantially
rectified current flowing therethrough under the
the same value of current fiows therethrough, the
balanced condition of the associated detector cir
two secondary windings S2 and Sli delivering
cuit is su?licient to put the magnetic material of
like voltages. As an aid in adjusting these two
the core of reactor BR at its most sensitive con
detector circuits, a core 59 of the adjustable re~
dition. Resistcrs SS and 'H are alike, and hence
actance DI may be adjusted as to its position
the two reactor circuits are balanced circuits
with respect to the windings 66 and 68.
30 with the result there is substantially no potential
An output circuit is connected between these
diíierence between terminals 1U and 12, and de
two balanced detector circuits and it can be
tector relay RI connected between these two ter
traced from the mid terminal of winding All, of
minals is normally deenergized. An unbalanced
the reactor AR through the left-hand portion of
condition of the detector circuits causes unequal
winding A4 and the right-hand portion of wind
currents to flow through the bias portions of
ing B4 of reactor BR to a mid terminal of wind
windings A4 and Bè, and the bias on reactor AR
ing B4. Also a wire 'i8 connects the two positive
is increased and that on reactor BR is decreased,
output terminals cf rectiñers Gl and G2. It is
or vice versa. Since current now flows in the
output circuit portions of windings A4 and B4 due
clear that as long as the detector circuits are bal
anced there will be no potential diiïerence be 40 to the unbalanced condition of the detector cir
tween the mid terminals of windings A4 and Bri
cuits, the bias on reactors AR and BR is further
and no current ñows in the output circuit, but an
increased on one and decreased on the other.
Due to these changes in the fluxes of the two
unbalanced condition of the detector circuits
causes a difference of potential between the mid
reactors, an unbalanced condition takes place in
terminalsl of windings A4 and Bil and current
the two reactor circuits so that current increases
iiows in the output circuit, the current being a
in one circuit and decreases in the other and
unidirectional current due to the rectification of
causes a difference in potential to appear across
rectiñers GI and G2. When a vessel approaches
terminals ïil and '12, and relay Rl is energized
mine MI and causes a magnetic field, such ñeld
when this difference Vof potential reaches a pre
causes the flux threading core 62 to increase and 50 determined value. This unbalanced condition
that threading 'core 63 to decrease, or vice versa,
between the reactor circuits is further amplified
and the impedances of windings 64 and 65 are
due to the action of the regenerative windings A3
and B3, these windings A3 and B3 being so poled
varied with the result the detector circuits are
unbalanced and current iiows in the associated
as to increase any unbalance in the reactor cir
cuits that happens to appear.
output circuit. This current thus created in the
output circuit is used to govern the reactors AR
It is therefore apparent that with no vessel
and BR.
present the circuits for the detector-amplifier for
Reactor AR has a three-legged core structure
mine MI of Fig. 2 are balanced and the detector
of material of high permeability and it is pro
relay Ri is deenergized, but that the approach of
vided with a circuit supplied with alternating
e, vessel unbalances the circuits of the detector
current for transformer TM. Specifically, this
element to causeV current to flow in the output
reactor circuit extends from secondary winding
circuit associatedtherewith and such output cir
Si through winding Al, on one outside leg of
cuit current in turn serves to unbalance the asso
reactor AR, winding A2 on the other outside leg
ciated reactor circuits, and relay RI is energized,
one leg of a full wave rectifier G2, resistor 53, left
hand portion of a winding B4 of a saturable
reactor BR to be described shortly, and a second
leg of rectifier G2 to the other terminal of sec»
of reactor AR, one arm of a full wave rectifier
G3, resistor 69 to terminal 79, thence through a
regenerative winding A3 mounted on the center
leg of the core of the reactor AR, and a second
arm of rectifier G3 back to the other terminal
of secondary winding Si. The alternating cur
rent windings Al and A2 are disposed for alter
nating flux to be set up inthe outside legs of the
core but not through the center leg which carries
both windings A3 and Ad, winding All being a re
generative winding. The number of turns for
the unbalance of the reactor circuits being fur
ther amplified through the regenerative windings.
Detector relay RI of Fig. 2 when picked up to
close front contact 40, completes the shunt cir
cuit including filter 2 I X-2IC across the line cir
cuit the same as in Fig. 1.
An unbalanced condition in the detector cir
cuits for the detector-amplifier of Fig. 2 may
appear due to variations in the voltage of the
power current. In order to prevent this, a wind
'. ing has been added to each core of the detector
2,409,719.
i
i3
element, winding '13 being mounted on core 62
and winding 'M on core 63. Secondary winding
S3 of transformer TM4 is connected to windings
14
Mi of Fig-2, the detector and reactor circuits are
balanced andy the detector relay is deenergized.
This balanced condition of the detector-amplifier
‘i3 and l!! through a full wave rectifier G5. The
windings 13 and 'Ell are poled and the current
is main ained through windings 'i3 and ‘la when
flowing therethrough is adjusted by resistance 'I5
oscillator Fl takes place. Also. a balanced con
dition of the reactor circuits is maintained over
so that when a change takes place in the applied
voltage variations of the power supplied from
a long period of time by the action of relay RB
and its associated circuits. 1i a vessel approaches
ance of cores S2 and S3 due to the change of the
2, the magnetic condition created
current through windings 13 and 'ffl will be sub 10 mine Mi of
thereby causes the circuits of the detector element
stantially equal and opposite to that which would
alternating voltage, the change in the iluX bal
take place through windings Bil and 65, due to
the change in the alternating voltage if windings
to become unbalanced and in turn cause an un~
balanced condition of the reactor circuits with the
result the detector relay RE is operated to con
13 and lll were not used.
Another characteristic of circuits of the `nature 15 neet the circuit path including iilter 'MX-21C
across the line circuit causing an indication to
here involved in the detector-ampliñer, is that a
be effected in the office in the saine manner such
perfect balance is difûcult to maintain over long
indication was effected in Fig. 1. The operation
of the apparatus of Fig. 2 for arming and nring
but may be due to various minute changes in the 20 the mine is the same asA described in connection
with the operation of 'the apparatus of Fig. 1.
magnetic material or in the insulation. To
Also, the eqtnpment o1" mine Mi ci Fig. 2 can be
maintain at all times a perfect balance, special
- periods of »time without periodic adjustment.
The reason for this is not very well understood,
circuits supp-lied from secondary winding S6 of
tested through the circuit path including front
transformer TM are provided. The resistors 69
and l! are preferably of the typ-e that shows a
contact t3 or” relay R3, the same as in Fig. 1.
Although I have herein shown and described
but two i’orms of apparatus ici' selective control
and indication systems embodying my invention,
it is understood that various changes and modi
ñcations may be made therein within the scope
of the appended claims without departing from
the spirit and scope of my invention.
Having thus described my invention, what I
claim is:
considerable positive and negative temperature
coeiîñcient.
The resistors 69 and 'H are enclosed
inside heater windings H3 and H4, respectively.
Winding H3 is connected to secondary winding
S6 through a left-hand contact 'I6 of a relay RB,
and winding Gil is connected to secondary wind
ing S5 through a right-hand contact 'H of relay
RB. Relay RB is a polar relay, the winding of
which is connected across terminals 'ill and 12
l. In a control and indication system, the comin multiple with the winding of relay Rl. Relay K 35 bination comprising, a first and a second location;
RB is made much more sensitive than the de
a line circuit'having at least one metallic line
tector relay RI, relay RB being operated on say
conductor extending between said locations; an
10% of the difference in potential between ter
minals 18 and 'i2 of that required to operate relay
at said first location; said oscillator to supply
RI.
As soon as an unbalance in the reactor cir
cuits appears and the potential diiîerence be
tween terminals 'iü and 'l2 is great enough to
operate relay RB but is only about 10% of that
required to operate relay Ri, relay RB is operated
to one position or the other. With relay RB thus
operated, heat will be applied to resistor 69 or 'H
as required to increase the unbalance that caused
relay RB to operate. The change in the resistors
e9 or ‘l0 takes place at a very slow rate and if
the unbalance of the reactor circuits is not one
created due to the approach of a vessel a balance
will be reached and then the correcting action
will continue until an unbalance is created in
oscillator, a ñlter and a diiTerential relay means
40 current at a preselectedfrequency,said relay means
having a first and a second energizing element.
said oscillator connected to said line circuit
through said ñlter and said íirst element of the
relay means to energize the relay means due to
the charging current supplied to the line circuit
as caused by the distributed capacitance of said
line conductor, a local current source connected
to said second element of the relay means to ener
gize the relay means, said last mentioned ener
gization of said relay means being opposite and
substantially equal to that created by said charg
ing current through said iirst element, a shunt
circuit including a iilter at said second location,
the opposite direction great enough to operate
relay RB in the opposite direction. When this
happens the other heater winding is supplied
with current and the unbalance is again reduced
toward zero, with the result that the currents in
the reactor circuits are being continually bal
said shunt circuit filter tuned to resonance at
anced and unbalanced at a very slow rate through
the action of relay RB and its associated circuits,
resultant energization of the. relay means, and
another circuit governed by said relay means in
the unbalance or“ the reactor circuits never ap
response to such resultant energization.
2. In a control and indication system, the com
bination comprising, a ñrst and a second location,
a line circuit including at least one metallic con
ductor extending between said locations; an os
cillator, a filter and a relay at said ñrst location;
said oscillator to supply current of a preselected
frequency and connected to said line circuit
through said filter and a winding of said relay;
said filter to tune the circuit formed by said os
proaching, however, the point where the detec
tor relay Rl responds.
The arming relay R3 of mine Mi of Fig. 2
receives current from the line circuit through
ñlter FTSE and rectiñer L32, the same as in Fig. 1_.
and hence this relay responds to current supplied
by the control oscillator F3! at the oiiice. Deton
ator DI of mine Ml of Fig. 2 is connected to the
line circuit through filter FTQ and electron tube
VI, the same as in Fig. l. and thus responds to
the iiring current supplied by the oscillator Fs
when control current is also present.
Normally, that is, when no vessel is near mine
said preselected frequency, circuit means includ
ing a normally open contact to connect at times
said shunt circuit across said line circuit to detune
the line circuit to reduce the charging current
supplied by said oscillator and create a given
cillator, filter, relay winding and distributed ca
pacitance of said line circuit with respect to
ground to resonance at said preselected frequency
to energize said relay by the line charging cur
2,409,719
` 15
rent supplied by said oscillator, a shunt circuit
including capacitance and inductance at said sec
16
to pick up the relay, and another circuit at said
íirst location including a contact of said relay.
4. In a control and indication system, the com
bination comprising, a first and a second loca
open contact to at times connect said shunt cir
tion, a two conductor line circuit extending be~
cuit across said line circuit to detune the line
f tween said locations an adjustable reactance
Circuit to reduce said charging current for op
means at said ñrst location interposed in the line
erating said relay by the variation thus created
circuit to provide line circuit impedance equal
in its energization.
to that for a line circuit kof a givenk length; an
3. In a control and indication system, the corn
bination comprising, a ñrst and a Second location, 10 oscillator, a iilter, a rectiñer, a two Winding relay
and a direct current source at said first location;
a line circuit to connect said locations and in
said oscillator of a preselected frequency and con
cluding a metallic conductor as one side of the
nected to the line circuit through said filter, recti- ~
circuit and the ground path as the other side of
iler and a Iirst'one of the relay windings; said
the circuit; an oscillator, a ñlter, a rectiñer, a two
iilter disposed to tune said oscillator connection
winding relay and a direct current source at said
and line circuit With its distributed impedance to
ñrst location; said oscillator to supply current
resonance at said preselected frequency to pro
of a preselected frequency and >connected to said
Vide a predetermined energization of the relay
line circuit through said ñlter, rectiñer and a
due to the charging current supplied by said os
first one of said relay windings, said filter> dis
posed to tune such circuit connection and the 20 cillator, said direct current source connected to
a second one of the relay windings to provide an
line circuit with the distributed capacitance of
energization opposite and substantially equal to
said line circuit conductor to resonance at said
' ond location, and means including a normally
preselected frequency to energize said relay due
to the charging current supplied by said oscil
that provided by said charging current, another
ñlter at said second location tuned to resonance
lator, said direct current source connected to a 25 at said preselected frequency, means to at times
connect said other filter to said line circuit to
second one of the relaywindings to create an
reduce the charging current supplied by said os
energization of the relay opposite and substan
cillator to provide a given resultant energization
tially equal to that created by said charging cur
of the relay to pick up the relay, and another .
rent, another filter at said second location and
tuned to resonance at said preselected frequency, 30 circuit at said'ñrst location including a contact
of said relay.
means to at times connect said other filter to said
ANDREW J. SORENSEN.
line circuit to reduce said'charging current and
create a given resultant energization of the relay
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 539 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа