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Патент USA US2412770

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Dec. 17, 1946.
.1.13. 'GLENNON
RISING DRIFTING MINE
Filed sept. 27, 19:52
2,412,770 «
ALT?
Patented Dec. 17, 1946
UNITED ST rss
2,412,770
RISING DRIFTING MINE
.ï ames B. Glennon, United States Navy
Application September 27, 1932, Serial No. 635,118
16 Claims.
(Cl. 102-10)
(Granted under the act of March 3, 1883, as
amended April 30, 1928; 370 0. G. ’757)
2
1
the vessel Hl approaches, but since such move
This invention relates to a drifting submarine
mine that will rise upward after a portion of the
assembly has been’contacted by a ship and has
ment displaces the float from its position of equi
librium above mine body ‘3, a restoring force is
among its objects:
present that draws the float back into contact
.
To provide a mine that will not be deñected by
the bow wave of an approaching vessel, that will
generally detonate under the vessel rather than
alongside thereof, and that will embody means to
delay the explosion until the mine is under the
amidship section close to the vitals of the ship
rather than at the forward extremity thereof
where the eifect of damage can be localized.
With the above and other objects in view, the
. invention consists in the construction, combina
tion and arrangement of parts as will be de
scribed more fully hereinafter.
In the drawing:
Fig. 1 shows a mine assembly according to my
if)
with the hull of the ship, thereby starting the
train of operations that results in the detonation
of the mine.
The release of ballast. weight 9 gives the mine
body a positive buoyancy that will cause the mine
to rise even though the buoy and float are both
torn away by the ship, the weight 9 being suñi
cient to overcome such buoyancy. The mine
rises during the interval between ignition of the
delay fuse and the detonation of the mine charge,
and as the Vessel will have moved forward during
this time, it is apparent that the actual explosion
willoccur against or close to, generally under, the
vessel at a location some distance aft of the bow.
Thus substantially the entire force of the explo
invention wherein the mine is floating freely;
Fig. la, shows the assembly just after the ballast 9.0 sion will be exerted upwardly against the ship,
due to the resistance of the water beneath the
weight has been dropped and the mine has begun
mine and at the sides thereof.
to rise; and Fig. 1b shows the mine under the
The ñring mechanism is of the well known sea
ship an .instant before the explosion;
battery type and is so designed that any iron ob
Fig. 2 is a diagram of the wiring circuit of my
invention.
v
My invention comprises vthree principal parts:
First, a mine body 3 that floats far enough be
neath the surface of the water to avoid horizon
tal deflection by the bow wave of anv approaching
ship connected by means of a cable »or line 4
(hereinafter called the antenna) to, second, one
or more antenna ñoats 5 sufficiently near the sur
face to be struck by a passing vessel and, third, a
buoy 6 that floats on the surface and is connected
ject brought into contact-»with copper cable 4
will actuate the firing device and explode the
mine.
Horns -8 are of iron, and when bent over
by contact with a. ship they touch the copper
sleeves or cups l I disposed around the bases of the
horns and in electrical connection with cable 4
and thus the ñring mechanism is operated, the
cups H being electrically insulated from the
horns.
Cable 'l is a cotton rope and has nothing
to do with the ñring device of the mine, float 6
serving merely to overcome the slight negative
to float 5 by cable l to maintain the other parts
of the assembly at the proper depth. However,
buoyancy of the mine assembly.
the buoy 6 is knot essential, as the depth of the
Fig. 2 illustrates the firing mechanism in th
float 5 and mine 3 may be regulated by mecha
mine body, including a delay detontator l2 that
nism within those parts.
explodes the mine a definite interval after the sea
The mine body 3 is provided with the usual sub 40 battery circuit has been closed, a release pistol
assemblies but particularly with a ñring mecha
primer i3 connected in parallel with detonator
nism that is actuated when either antenna 4 or
l2 to fire the release pistol at the instant of con
one of the contact horns 8 of float 5 is struck by
tact to free weight S from the mine body, a battery
a vessel and with a delay detonator l2 that ignites
i4 to supply the firing current, a, hydrostatic :safe
when the firing mechanism is operated but does 45 ty switch i5 to prevent firing the mine before it
not explode the charge of the mine until several
is planted in case of .accidental closing of »switch
seconds later. The mine body is further pro
l5 which‘is connected to be closed by the action
vided with an external ballast weight 9 that is~
cf the sea battery. ’Switch i 5 remains open until
released by the firing of a release pistol simul
the mine bas reached the depth at which it is to
taneously with the Àinitiation of the operation of 50 ñoat; thereafter, upon contact of a ship with a
the firing mechanism of the mine.
horn 8 or with antenna ¿l the sea battery closes
Float 5 is small in volume >and insignificant in
switch l5, thus completing the iiring circuit,
weight in comparison to the mine body 3. Being
whereupon primer i3 fires the release pistol and
at a level where the eiîect of a bow wave is great,
causes weight 9 to be dropped and the action of
the ñoat 5 may be temporarily thrown aside >as 55 delay >detonator l2 'is initiated. As soon as `weight
2,412,770
3
4
9 is dropped, the mine body begins to rise, the de
of said firing mechanism when contacted by a
lay action of detonator I2 allowing suñicient
vessel.
6. In combination, a mine body having inherent
positive buoyancy, a ñring mechanism therein,
a Weight releasably attached to said body, means
to release said weight at the initiation of opera
tion of the ñring mechanism of said body, a
sea battery circuit electrically connected to said
ñring mechanism, said circuit including an an
time for the mine to reach a position at or very
near to the bottom of the contacting vessel before
the explosion of the charge.
It will be understood that the above description
and accompanying drawing comprehend only the
general and preferred embodiment of my in
vention, and that various changes in construc
tion, proportion and arrangement of parts may be
made Within the scope of the appended claims
Without sacrificing any of the advantages of this
invention.
The invention described herein may be manu
factured and used by or for the Government oi’
the United States of America, for governmental
purposes Without the payment of any royalties
thereon or therefor.
I claim:
1. In combination, a mine body, ñring mecha
nism therein, a weight releasably attached to the
exterior thereof, means to release said weight at
the initiation of operation of the ñring mecha
nism of said body, said mine body having posi
tive buoyancy after the release of said Weight, a
copper antenna cable connected to the ñring
mechanism of said body, an antenna float, copper
cups on said iioat connected to said cable, a bend
able iron contact horn in each of said cups in
" tenna cable connected to said body and means
connected to said cable and adapted to noat above
said body at a depth to be contacted by a passing
vessel, said means being adapted to initiate oper
ation of the ñring mechanism of said body when
so contacted.
7. In combination, a mine body having inher
ent positive buoyancy, ñring mechanism therein,
a weight releasably attached to said body, means
to release said Weight at the initiation of opera
-tion of the firing mechanism of said body, said
body being adapted to float at a depth too great
to be disturbed by the bow wave of a vessel while
said Weight is attached, and means connected to
said body to initiate operation of the firing mech
anism of said body upon contact with a vessel and
adapted to float at a depth at which it may be so
contacted.
8. In combination, a mine body having inher
ent positive buoyancy, firing mechanism therein,
sulated therefrom, and a buoy connected to said 30 a Weight releasably attached to said body, means
ñoat.
to release said weight at the initiation of opera
2. In combination, a mine body, firing mecha
tion of the firing mechanism of said body, a ñoat
nism therein, a Weight releasably attached to
connected to said body to remainnormally at a
the exterior thereof, means to release said
depth to be contacted by a. vessel, said float being
Weight at the initiation of operation of Vthe
light in comparison with said body whereby, when
ñring mechanism of said body, said mine body
said ñoat is displaced by a Wave set up by a mov
having positive buoyancy after the release of said
ing vessel, the connection between said float and
weight, a copper antenna cable connected to the
said body Will draw said-iioat back into contact
firing mechanism of said body, an antenna float,
with the vessel, and means on said float to initiate
copper cups on said float connected to said cable, 40 operation of the ñring mechanism of said body
a contact horn in each of said cups insulated
when so contacted.
v
therefrom, and a buoy connected to said iioat.
9. In a submarine drifting mine, a mine body,
3. In combination, a mine body, ñring mecha
ñring mechanism therein, a weight releasably at
nism therein, a Weight releasably attached to the
tached thereto and adapted to be released there
exterior thereof, means to release said weight at 4 . from at the initiation of operation of the firing
mechanism of said body, said body having inher
the initiation of operation of the ñring vmecha
nism of said body, said mine body having positive
ent buoyancy whereby it will rise when said
buoyancy after the release of said Weight, a cop
Weight is released, and means adapted to initiate
per antenna cable connected to the firing mecha
operation of said ñring mechanism upon contact
nism of said body, an antenna ñoat, copper cups
on said iloat connected to said cable, and a contact
horn in each of said cups insulated therefrom.
4. In' combination, a mine body, firing mecha
nism therein, a weight releasably attached to the
exterior thereof, means to release said weight at
the initiation of operation of the ñring mecha
nism of said body, said mine body having positive
buoyancy after the release of said weight, an
antenna cable connected to the firing mechanism
of said body, said cable forming part of a sea
battery circuit, an antenna ñoat, and contact de
vices on said ñoat connected to said cable and
adapted to close said circuit.
' 5. In combination, a mine body having inher
ent positive buoyancy, firing mechanism therein,
a Weight releasably attached to said body, means
to release said weight at the initiation of opera
tion of the firing mechanism of said body, a sea
battery circuit electrically connected to said firing
mechanism, said circuit including an antenna
cable connected to said body, a float attached to
said cable and adapted to float beneath the sur
face of the Water, and means carried by said float
and connected to said cable to initiate operation
with a vessel.
10. In a submarine mine, an explosive charge
therein, a mine body, a Weight releasably attached
to said body, a source of electric current in said
` body, a delay ñring means for the charge in said
body actuatable by said source, means actuatable
by said source and connected in parallel with said
ñring means to initiate the release of said weight,
and means to close the circuit through said
source, said firing means and said second men
tioned means.
11. In a submarine mine, an explosive charge
therein, a mine body, aweight releasably at-l
tached to said body, a source of electric current
in said body, firing means for the charge in said
body actuatable by said source, means actuatable
by said source to initiate the release of said weight,
and means to close the circuit through said firing
means and said second mentioned means.
12. In combination, a mine'body, a firing
mechanism therein, a copper antenna cable con---
nected to the ñring mechanism of said body, an
antenna float, copper cups on said float connected
to said cable, and a contact horn of a different
metal from the cup respectively arrangedin each
of said cups and insulated therefrom.
`
2,412,770
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13. In a submarine mine, a mine body having
an explosive charge therein, a Weight releasably
attached to said mine body, said body being
adapted to rise in the Water after the weight has
been released, means responsive to contact with
a vessel for causing said weight to be released,
and means for ñring said explosive charge in pre
determined time delay relation With respect to
the release of said weight.
'
14. In a submarine mine adapted to float at a
predetermined depth of submersion within a body
of Water, a mine casing, a weight releasably at
tached to said mine casing, means for releasing
said Weight, means responsive to contact with a
vessel for causing the weight to be released by
said releasing means, means for initiating the
explosion of said explosive charge as the mine
starts to rise within the water, and means for de
laying the explosion of said explosive charge un
til suñîcient time has elapsed for the mine to rise
Within the water to a depth oi' submersion corre
sponding to the draft of the vessel.
15. A floating submarine mine of the charac
ter disclosed having an explosive charge therein,
a weight releasably secured to said mine sufficient
to impart a negative degree of buoyancy thereto,
means including a buoyancy member for causing
the mine to ñoat at a predetermined depth of sub
mersion Within a body of Water, a source of elec
trical power, electro-responsive control means
adapted to release said Weight, means responsive
to contact with a vessel for closing an electrical
circuit from said source of electrical power to said
electro-responsive control means thereby to re
lease said Weight and cause the mine to rise with
in the water, and means initiated by said circuit
closing means concurrently with the release of
said weight for causing the explosive charge to be
ñred in predetermined time delay relation with
respect to the release of said Weight.
16. In a submarine mine of the character dis
closed, the combination of a buoyant mine cas
ing, a Weight releasably secured to said casing of
suñicient mass to cause the mine to sink Within
the water, said mine `casing having positive buoy
ancy after the release of said Weight, a length of
cable secured to said mine casing having a buoy
ant member attached thereto, a float secured to
said buoyant member adapted to remain on the
surface of the water and maintain the buoyant
member and mine submerged at predetermined
depths of submersion respectively, an explosive
charge Within the casing of said mine, circuit
closing means on said buoyant member adapted
to be actuated by contact with a vessel, means
controlled by said circuit closing means for re
leasing said weight in response to the actuation
of the circuit closing means by said vessel thereby
to cause the mine to rise Within the water, and
means adapted to be operated by said circuit
closing means concurrently with the release of
said Weight for vcausing the explosive charge to be
exploded in time delay relation with respect to
the actuation of the circuit closing means.
JANES B. GLENNON.
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