close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2406111

код для вставки
Aug. 20, 1946.
'
B, SHEFFIELD
- 2,406,111
RADIO SUBMARINE LURE AND TRAP
Filed Dec.» 10, 1945
T1 :1 -1.
2 Sheets-Sheet 1
u MAG/NET’?
1€££L CABLE
AMEN 3/6/1011.
C'O/VTA? 0L
INVENTOR;
Berifwld
)fégwwu
ATTOB/YEY
Aug. 20, 1946.
B, sHEFFlELD
2,406,111 v
RADIO SUBMARINE LURE AND TRAP
Filed Dec. _l0, 1943
2 Sheets-Sheet 2
\_-—p
\_’
BY /
ATTORN EY
2,405,111
Patented Aug. 20, 1946
UNITED STATES PATENT OFFICE
2,406,111
RADIO SUBMARINE LURE AND TRAP
Berthold She?'ield, Rocky Point, N. Y., assignor
to Radio Corporation of America, a corporation
of Delaware
Application December 10, 1943, Serial No. 513,665
9 Claims. (01. 35-25)
2
1
This invention relates to a submarine radio lure
and alarm system.
This invention will best be understood by re
ferring to the accompanying drawings in which:
Fig. 1 shows a top view of the general arrange
An object of this invention is to provide a radio
ment of the system of this invention,
lure for a submarine.
Fig. 2 shows an arrangement of the radio lure,
Another object of this invention is to provide
Fig. 3 shows the radio alarm device and trans
an alarm or trap for submarines.
mitter, and
A feature of this invention is a simple oscilla
Fig. 4 shows an alternative alarm device and
tor which provides the lure transmitting a weak
transmitter.
radio signal around 600 meters and a trap or
The arrangement of the system of this inven
alarm system which is located near the lure de
tion as shown by Fig. 1 includes a lure radio
vice which has means to simulate radio frequency
transmitting device I, and an alarm transmitter
oscillation signals at a different frequency from
2, both of which are fastened together within
that of the lure device.
a circle of mechanical linkages or guys 5 and
The submarine radio lure and trap of this in
vention is intended to lure a submarine into the 16 electrical linkages 3 and also a plurality of reels
4. An alarm signal control line 6 connects the
region of an invisible radio trap. The trap, on
transmitter with the electrical linkages 3. Each
contacting the vessel, attaches itself and dis»
reel has a U-shaped permanent magnet ‘l secured
closes its position and movement by supplying
to the end of a cable 8. The magnet ‘I will at
a continuous radio alarm signal which gives com
pass bearings to distant observers.
20 tach itself to any magnetic material such as a
submarine or a ship’s hull and while attached
The device of this invention is divided into two
thereto, sets off the radio alarm and other ap
parts, one part being the lure device or lure
transmitter, and the other part being the trap,
which consists of a number of ?oating tackles
paratus.
Referring now to Fig. 2, the lure device I com
Each 25 prises a water-tight container l2 which holds a
low power radio transmitter l3. The transmitter
tackle in turn has two separately ?oating units
I3 is tuned to operate around a frequency of 600
including a spring retracting reel and the tackling
and a single associated alarm transmitter.
meters. The container 12 is arranged to ?oat
slightly submerged below the surface of the water
microswitch. The reels ?oat submerged and 30 I4. A thin vertical antenna I5 is supported from
container I! by means of an insulator IS.
their spring retracting cable holds the tackling
The trap or alarm actuating devices shown
device in close proximity. A number of reel and
by Fig, 3 consist of permanent magnets 1 con
tackle units are arranged to float in a large circle.
structed to be very light in weight and of high
They are linked mechanically and electrically to
magnetic strength so as to be readily attracted
device which consists of U-shaped magnet and
either an associated inductance or an associated
the common alarm transmitter which floats
slightly submerged.
The lure device is in the form of a very simple
radio frequency oscillator having an operating
frequency range of about 600 meters to simulate
the oscillations which might be carelessly radi
ated by a shipboard radio receiver, thus apparent
ly divulging to the submarine the position of a
passing convoy. It consists of a water-tight box
by a steel hull [2 of a submarine. When the
magnets l attach themselves ?rmly to the sub
marine, closure of the magnetic circuit by the
submarine’s steel hull l2 induces a voltage in an
inductance I9 mounted on the magnets l. The
induced voltage in turn triggers a radio system
20, which comprises a cold cathode tube 2|, a
sensitive relay 22 and a simple high frequency
transmitter 23 operating at a frequency range of
holding a low power lure transmitter which ?oats 45 about 5 to 10 meters.
slightly submerged and has located thereon a
An alternative form for starting the radio alarm
very thin vertical antenna which projects above
transmitter is shown by Fig. 4, which may be by
the surface of the water. As a modi?cation the
mechanical means, such that contact of the mag
above mentioned lure transmitter may be remote
nets II with a ship's hull l2 operates a micro
1y controlled to simulate movement in position
switch I‘! mounted on the pole pieces of the mag
of a vessel and also that of a varying radio fre
nets ! l, causing a relay l8 to close, which in turn
quency. The trap and alarm device consists of
starts the radio transmitter 23.
a plurality of U magnets and associated induct
In the operation of this system the magnetic
trap and alarm devices are mechanically linked so
ance (or microswitch) comprising the tackling
device, also cable reels, mechanical and electrical . that a moving submarine will pull the entire light
weight system, shown by Fig. 1, along its path.
linkages for conducting alarm pulses to the com
mon alarm device or alarm radio transmitter
It is desirable to have the lure send out Weak os
which has, located in its water tight compart
ment, mechanisms for emitting short wave radio
cillations of about 600 meters continuously. The
alarm transmitter sends cut short wave oscilla~
frequency signals.
60 tions when one of the magnets is attached to the ‘
2,406,111
3
4
hull of the submarine by actuation of the relay.
trap magnets may follow the submarine to any
depth without submerging the alarm devices be
to set oiT and continue to sound the radio fre
quency oscillations from said radio alarm de
vice when said magnet attaches itself and re
mains attached to said magnetic object.
5. A submarine lure and alarm system compris
ing a lure device having means to radiate radio
frequency oscillations to attract a submarine to
low the normal level of the water surface l4.
its location, a radio alarm device located near
The alarm transmitter also serves as a radio com
pass station and discloses the position of the sub
marine to radio observers within a radius of about
50 miles. By means of reels d and cables 8 the
and coupled to said lure, said radio alarm device
rrho alarm transmitter antenna 353 is a ‘small
thin vertical rod which is invisible for all practical 10 having means including a U-shaped magnet and
associated mechanism to radiate radio frequency
purposes because of its smallv dimensions it is
e?icient for radiation at the operating frequency
oscillations which are of a different frequency
value from the frequency radiated by said lure,
of 5 to 10 meters. Detection of its location by
said U-shaped magnet being arranged to attach
the uninitiated radio monitoring listener is un
likely as the alarm transmitter is intended to 15 itself to a magnetic object on the attracted sub
operate on frequencies outside the regular radio
marine and to set off and continue to sound the
compass range.
radio frequency oscillations from said radio alarm
device when said magnet attaches itself and re
The lure transmitters will also serve to warn
mains attached to said magnetic object'
f
friendly vessels from the vicinity of “mined”
areas. In this system only one lure is required for .20
6. A submarine lure and alarm system compris
a large number of traps.
ing a water-tight container having located there
,
‘While I have indicated and described a system
on a lure device having means to radiate radio
of my invention, it will be apparent to one skilled
frequency oscillations to attract asubmarine to
in the art that my invention is by no means
its location, a plurality of alarm devices located
limited to the particular devices shown and de~
scribed, but that many modi?cations may be made
without departing from the scope of my inven
near and coupled to said lure, said radio alarm
device having magnetic means to attach them
selves to the attracted submarine and means to
tion.
then radiate radio frequency oscillations which
,
What I claim is:
'
are of a different frequency value from the fre
,
l. A submarine lure and alarm system compris 30 quency radiated by said lure. ' _ I
ing a lure device having means to radiate radio
'7. A submarine lure and alarm‘system compris
frequencycoscillations to attract a submarine to
ing a lure device having means’ including a radio
transmitter to radiate radio frequencyroscillae
its location, an alarm device located near and cou
pled to said lure, said alarm device‘ having mag
tions, a radio alarm device’ located near and
netic means to attach itself to the attracted sub 35 coupled to said lure, said ‘alarm device having
marine and means to then radiate radio frequency
means including a magnet and associated mech
anism to radiate radio ‘frequency oscillations
oscillations which are operated at a different fre
quency value from the frequency radiated by said
which are of a different frequency value from'the
lure.
‘
‘
l
frequency radiated by-said lure, said magnet ar
r
2., A submarine lure'and alarm system compris
40 ranged to be attached to the magnetic metal of a
ing a lure device having means to ?oat slightly
submerged below the surface of a large body of
water and to radiate radio frequency oscillations
to attract a submarine to its location, a plurality
ship’s hull, and a relay device associated with
said magnet to actuate said- radio transmitter
when said magnet is attached to the hull of a
ship.
'
'
'
'
8. A submarine lure and'alarm system compris
pled to said lure, said alarm devices having mag
ing a water-tight container having located there
netic means to attach themselves to the attracted
on a'lure device having means to radiate radio
submarine and means to then radiate radio fre
frequency oscillations to attract a submarine to
quency oscillations which are operated at a dif
its location, a plurality of alarm devices located
ferent frequency value from the frequency ra 50 near'and coupled to said lure, said alarm devices
of alarm devices located in a circle near and cou
diated by said lure.
'
3. A submarine lure and alarm system compris
ing a lure device having means including a ver
tical rod antenna to radiate radio frequency cs
cillations to attract a submarine to its location, a
plurality of alarm devices located near ‘and cou
pled to said lure, said alarm devices having mag
netic means to attach themselves to the attracted
submarine and means to then radiate radio fre
quency oscillations which are operated at a dif
45
having magnetic means to attach themselves to
the attracted submarine and means to then ra
diate radio frequency oscillations which are of a
different frequency value from the. frequency ra
diated by said lure, and a vertical radiator located
on said water-tight containerto radiateradio fre_
quency oscillations.
' ‘
.
’- ‘.
9. A submarine lure and alarm system comprise
ing a water-tight container havinglocated there
on a lure device having means to radiateradio
ferent frequency value from the frequency ra
frequencyoscillations to attract a submarine to
diated by said lure.
’
_
its-location, a plurality of alarm devices located
a. A submarine lure and alarm system compris
near and coupled to said lure- bygmechanicaland
ing a lure device having remote control means to
electrical linkages, a reel and a cable securing all
radiate radio frequency oscillations to attract a 65 of said alarm device together, said alarm devices
submarine to its location, a radio alarm device 10
having magnetic means to attach themselves to
cated near and coupled to said lure, said alarm
the attracted submarine and meancs'to then ra
device having means including a magnet and as
diate radio frequency oscillations which are of a
sociated mechanism to radiate radio frequency
different frequency Value from the frequency ra
oscillations which are of a di?erent frequency
diatedrby said lure, and a vertical radiator lo
value from the frequency radiated by said lure,
said magnet being arranged to attach'itself to a
cated on said water-tight container to radiate
magnetic object on the attracted submarine and
radio frequency oscillations.
'
"
' V
‘
BERTI-IOLD SHEFFIELD.,
Документ
Категория
Без категории
Просмотров
0
Размер файла
407 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа