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Патент USA US3048121

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Àug- 7, 1962
K. L. BAKER ETAL
3,048,1l1
SUBMARlNE SIGNAL FUZE
Filed Feb. l0, 1955
5 Sheets-Sheet 1
Aug. 7, 1962
K. L. BAKER ETAL
3,048,111
SUBMARLNE SIGNAL FUzE
Filed Feb. 1o, 1955
3 Sheets-Sheet 2
INVENToRs
K. L. BAKER
T. C. SMITH
L. A. PECHMANN
ATTORNEYS
Aug. 7, 1962
K. L. BAKER ETAL
3,048,111
SUBMARLNE SIGNAL FUzE
Filed Feb. lo, 1955
s sheets-sheet s
F l G. 5.
F I (1.4.
INVENTORS
K. L. BAKER
59
T. c. SMITH
21A. PECHMANN
ATTORNEYS
nited States Patent Oiilice
Sßißill
Patented Aug. 7, 1962
l
2
3,048,111
lit within the launching tube and bridge the water pulsing
connection thereto whereby the actual launching is ac
complished. Another novel feature of the device includes
a locking device arranged on the signal body and interen
SUBMAE SHGNAL FUZE
Kenneth L. Baker, College Park, Md., and Thomas C.
Smith, Poughkeepsie, and Louis A. Peehinann, Mill
brook, NX., assignors, by direct and mesne assign
ments, to the United States of America as represented
by the Secretary of the Navy
Filed Feb. 10, 1953, Ser. No. 336,144
7 Claims. (Cl. IGZ-'70)
The present invention relates to an arming and tiring
mechanism for pyrotechnic signals adapted to be re
leased under water and, in particular, to an arming and
firing mechanism for pyrotechnic signals which are
gaging the guide shoe to prevent the release of the same
before the device is placed in the launching tube. A
further novel feature of the device includes an arming
and firing means operable only in response to the prede
termined sequence of hydraulic pressure conditions to
which the signal is subjected after being launched.
A still further novel feature of the signal device is the
provision of an out-of~line firing arrangement whereby
the firing charge is not placed in line with the firing pin
until the high hydraulic pressure condition has been met.
launched by a submerged submarine whereby intelligence
~ Other features of the signal device include a pressure
may be conveyed to observers above the surface of the
responsive water inlet valve which controls the flow of
water to within the body of the device, and a latch ar
rangement whereby movement of the mechanism within
Water. The intelligence may be conveyed by a dye type
marker released on the surface of the water, by smoke
and/ or flame, or by a ilare type device launched into the
air.
Devices of this type which have been used heretofore
the body of the device due to jars, jolts or rough handling
is prevented.
Other objects and many of the attendant advantages
have been constructed in such a way that premature
of this invention will be readily appreciated as the same
functioning of the signal has caused serious injury to
persons handling the same. A careful study of prior art
devices `and the arrangement through which these devices
becomes better understood by reference to the following
detailed description when considered in connection with
are launched from a submarine has indicated that the
the accompanying drawings wherein:
FIG. l is an elevational view of the device of the pres
firing arrangement of the signal has not proven entirely
satisfactory. Furthermore, the signal and fuze have not
been suñiciently safe to withstand sudden jars or bumps
ent invention illustrating a pyrotechnic signal attached
while being handled outside the launching means.
Accordingly, an object of this invention is to provide
an arming mechanism for the signal which is actuated by
means which are unique to the launching and surfacing
of the signal.
A further object of the disclosure is to provide means
operable from within and near to the end of the launch
the present invention illustrating a fragmentary portion
of the pyrotechnic signal and the launching tube, the de
ing tube whereby the arming mechanism of the signal is
released to function. By means of such an arrangement,
a premature `operation activation of the signal or intel
ligence medium is prevented until the device is clear of
the launching means añixed to the submarine hull.
A still further object of the invention is to provide an
arming and firing mechanism for a signal of the described
type which is operable through progressive steps and
actuated by changing pressures of the water medium
through which it is launched, and since it will of necessity
be launched only from a submerged submarine, the steps
are responsive first to a relatively high hydraulic pressure,
followed by a relatively low hydraulic pressure. In this
way, premature actuation of the signal by careless han
dling outside of the launching means is prevented.
It is a requisite of all such signal devices that the in
telligence be released at the surface of the water and, ac
thereto;
FIG. 2 is a horizontal sectional view of the device of
vice being shown in a safe or unarmed condition;
FIG. 3 is a view similar to FIG. 2 illustrating the de
vice in an armed condition;
FIG. 4 is an end elevational view of the device of
FIG. 2;
FIG. 5 is a vertical sectional view taken on the line
5-5 of FIG. 2; and
FIG. 6 is a fragmentary elevation view to the sector
plate and the tiring pin latch carried thereby.
Referring now to the drawings for a more complete
understanding of the invention and more particularly to
FIGS. l and 2 thereof, the numeral 10 generally indi
cates the fuze mechanism of the present invention, 11
' indicates a conventional pyrotechnic intelligence convey
ing or signalling device and 12 indicates a fragmentary
portion of a submarine launching tube.
The fuze device is contained within a hollow cylindri
cal body 13 adapted for mounting on, or partially with
in, the enclosure shell 14 of the pyrotechnic signal 1l,
the device 10 and signal device 11 being secured together
in any suitable manner such, for example, as threading
the p-arts together as indicated by the reference character
cordingly, it is essential that the signal is positively
15, a sealing gasket 16 being disposed between the opened
buoyant. When the signal has reached the surface of 55 end of the shell 14 and a. shoulder 17 formed on the
the tbody of water into which it was launched, the rela
body 10. The hollow body 13 is divided generally into
tively low hydraulic pressure step is satisfied and the arm
two chambers 18 and 19 by a bulkhead or partition 20.
ing and firing steps then are completed.
The outer end wall 21 of the body 13 is formed with a
The present day submarine is designed to operate at
centrally located boss 22 having an inwardly extending
far greater depths than have been possible heretofore. 60 opening 22a adapted to receive one end of a reciprocating
Accordingly, a still further object of the invention is to
piston generally indicated -by the numeral 25. The bulk
provide an arming and :firing mechanism for a signal
head 20 carries a centrally located boss 23 having a
which is rugged enough to withstand launching into the
through .opening 24 adapted to receive the other end of
zone of high hydraulic pressure present at the greater
piston 2S. The piston 25 comprises a rod or sleeve 26
depths at which the modern submarine may operate. 65 and a ñring pin 27 which are in axial alignment and de
Furthermore, the mechanism must be suthciently delicate
tachably locked together by a ball type latch actuated
to bring about proper functioning at the relatively low
by spring 30 in a manner to be described in detail here
hydraulic pressures resulting from operation of the sub
inafter. The ball type latch comprises a pair of locking
marine in shallow water.
balls 28 respectively disposed in a pair of diametrically
'I'he novel features of the signal device according to the 70 arranged openings 29' formed in the rod or sleeve 26. As
present invention include a long guide shoe adapted to
shown more clearly on FIG. l the balls 28 are disposed
3,048,111
3
4
within an annular groove 31 formed in the tiring pin 27
Thus when the device is placed in the launching tube
with the shoe disposed within the portion 58 of the
slot 57, the guide shoe 57 will maintain the valve 44 in
a closed position regardless of the position of the latch
56. When the device is not in the launching tube, the
guide shoe 51 is prevented from rotation about the shaft
61 -by a pin 62 disposed in a slot 80 formed in the latch
56 and extending from the latch through the guide shoe
and maintained in engagement therewith by a sleeve or
bushing 32 secured to the boss 23 as at 33. The sleeve
is provided at one end thereof with an annular recess 34
the purpose of which will become more apparent as the
description proceeds. The rod-like portion 26 of the re
ciprocating piston is arranged within chamber 19‘ of the
body 13 and is secured to a ñange 35 as at 36. One end
of a flexible bellows 37 is attached to the iiange 35 in
51 and into a recess 63 in the body 13. This pin may be
any suitable manner such, for example, as welding the 10 removed only by the rotation of latch 56 about the shaft
part together, 'While the other end of the bellows is se«
61, however, rotation of the latch and removal of the
cured to bulkhead 20 as at 38.
In order that the `bellows 37 may be extended at at
pin is prevented by a safety pin 40 extending through
the latch and shaft.
Axially remote from the detent in the rod-like portion
mospheric pressure, a spring 39 is arranged within the
bellows and extends between the collar 50 and the flange 15 of the piston 25, and arranged within the chamber `18,
35, the spring being arranged about the piston 25, boss
is a rotatable arming device generally indicated by the
23 and sleeve 32. It will be understood, however, that
reference character 6i) by which the tiring charge is
by this arrangement the spring and bellows exert a force
brought into line with a striker 70 formed on end of the
against the underside of flange 35 equivalent to a force
ñring pin 27. The arming device is best shown in
of 5-11 p.s.i. hydraulic pressure in chamber 19 available
FIG. 5 and comprises a shaft 64 upon which a normally
via passage or port 41 formed in end wall 21, FIGS. 2
locked Sector plate 65 is rotatably supported, the plate
and 3.
being adapted to be rotated in a clockwise direction un
Movement of the piston 25 due to jars, bumps, or rough
der the urging of a spring 66 when released. Arranged
handling is prevented by the interengagement of an an
on the rotatable sector plate 65 is a latch 67, including a
nular groove 42 formed in the rod 26 of the piston 25 25 `boss 63 and a holder 69 for the primer, delay and relay
and a locking dog 43 arranged within boss 22 and ex
tending perpendicular to the line of movement of the
piston. The outer end of the dog 43 extends to the ex
terior of the body 13 and is ñtted with a spring loaded
element 71 arranged in a sleeve 72 formed on and carried
by the sector plate 65.
The boss 68 is provided with a centrally disposed bore
73 having an end wall 74 formed on one end thereof,
valve arrangement generally indicated bythe reference 30 the wall and a portion of the boss 66 being provided with
character 44 which is responsive to the hydraulic pres
a slot 75, one end of which is open as at 76, FÍGS. 5 and
sure of the surrounding water prevailing outside of the
body 13 when the signal is launched in a body of water.
The spring loaded valve 44 is disposed Within a well
45 formed in boss 22 and comprises a valve head 46
integrally formed on the locking dog 43, the head 46
being in sealed engagement with a valve seat 47 arranged
within the boss 22 and composed of any material suitable
6.
yAs more clearly shown in FIG. 6 the boss 68 has
formed therein a slot 77 bordering on the slot 75 and of
greater Width than the slot 75, one end of the slot 77
being open as at 78 and restricted as at 79.
As more clearly shown on FIG. 2 the shaft 81 of the
tiring pin 27 is disposed within the slot 75 and the collar
on disc 82 formed thereon in disposed within the bore
for the purpose such, for example, as rubber or the like.
73 in engagement with the end wall 74 and alignment
40
The valve head 46 has formed thereon a sleeve 48 hav
with the restricted slot 75. By this arrangement the sec
ing a flange 49 arranged on one end thereof in abutting
tor plate is in a locked condition until the firing pin is
engagement with the wall defining the well 45 and a shoe
removed sufficiently to cause alignment of the disc with
generally indicated by the numeral 51. The sleeve 4S
the slot 77 and thus releasing the sector plate for move
is provided with a centrally disposed bore 52 having a
ment from an initial safe position to an armed position
spring 53 arranged therein, one end of the spring being 45 by the arming spring 66.
The shaft 64 for rotatably supporting the sector plate
in engagement with the shoe 51, the other end thereof
being in engagement with the valve head 46. As more
clearly shown on FIG. 2 a spring 54 is disposed about
the sleeve 4S, one end of the spring being in engage
65 is secured to the bulkhead 20 in any suitable manner
preferably by threading one end S4 thereof into a suit
engagement with valve seat 47. The sleeve 48 is pro~
vided with a plurality of transverse ports or openings 55.
The valve 44 is maintained in a normally closed posi
wrench may be attached thereto for threading the end
34 into the opening 85. The shaft 64 is disposed within
able opening 35 formed in tbe bulkhead, the shaft being
ment with the flange 49, the other end thereof being in 50 provided with wrench engaging surface 86 whereby a
a ibore 87 formed in the sector plate 65 and a bore 88
tion by the guide shoe 51, movement of the shoe being
formed within an ear 89 carried by the sleeve 72. By
prevented by the latch 56, and movement of the latch 55 this arrangement the sector plate is supported by the
being prevented by the safety pin 40. However, as the
device is placed within .the launching tube, the safety pin
shaft 64 for rotative movement.
As more clearly shown on FIG. 4 the shaft 61 is sup
40 is removed from the latch member and the shoe is
ported by a pair of mutually spaced ears 91 formed on
engaged in the T-shaped slot 57 formed in the tube and
the casing, the shoe being pivotally mounted ou the shaft
thus the shoe remains in engagement with the valve 44 60 by a pair of ears 92 formed thereon and disposed at a
to maintain the valve in a closed position until the device
right angle with respect to the shoe. It will be noted
leaves the tube whereupon the latch is tripped and the
that the latch 56 is keyed on the shaft 61 and disposed
shoe moves tol the release position (FIG. 3). The valve
between the ears 92 and in abutting engagement with
arrangement is operable in response to a predetermined
the offset portion 93 of the shoe. It will be understood
hydraulic pressure after it is freed to move by the launch 65 that the latch and shoe are supported by the shaft 61
ing mechanism in a manner which will now be explained.
for rotative movement. However, rotative movement
As more clearly shown in FIG. 4, the T-shaped slot
of the latch 56 and shoe 51 is prevented by means of the
comprises a broad portion 58 and a restricted portion 59
safety pin 40 and rotation thereof will not occur until
bordering thereon. When the signal device 11 is placed
the safety pin is removed and the latch 56 is tripped.
within the launching tube 12 the latch 56 extends into the 70
As more clearly shown on FîGS. 2 and 3 a plug 94
stem or restricted portion 59‘ of the slot 57 and the guide
closes the open end of the casing 13, the plug being
shoe 51 extends into the flat or broad portion 58 thereof.
threaded therein as at 95 and a sealing gasket 96 being
disposed between the casing 13 and plug 94. The plug
The fiat portion 58 of the slot is continuous throughout
94 has formed therein a centrally disposed recess or well
the length of the launching tube but the stem portion 59
stops short of the outer end of the tube.
75 97 and a restricted recess 98 in communication therewith,
3,048,111.
5
the recess being provided with a relatively thin wall 99
bordering on chamber 13, the wall 99 being in alignment
with the combination primer, delay and relay element 71
As heretofore mentioned, the opening of the valve
means 44 began when an external pressure of about 50
p.s.i. is attained, or when the device is substantially 110
when the sector plate has been rotated to an armed posi
tion, FIG. 3. It will be understood that a conventional
to 115 feet below the surface of the water.
pyrotechnic charge may lbe arranged in the well 97 and
recess 9S, such, for example as an expellant charge or the
like, the charge being indicated by the numeral 101. The
charge 101 is adapted to be ñred by the element 71 in
time delayed relation with respect to the firing of the
element by the striker 70. The_firing of the charge 101
cess of 110 to 115 feet it may also be launched at mini
mum depths of about 25 feet and still function satisfac
torily. At the aforesaid shallow depths, the valve 44
will open immediately upon the device leaving the launch
ing tube and, accordingly, the chamber 19 will be ex
posed to substantially 11 p.s.i. of hydraulic pressure. As
heretofore mentioned, spring 39 and bellows 37 exert an
eñective force of about 5 to ll p.s.i. hydraulic pressure
against the flange 35, the flange and piston are moved
to the right in response to the hydraulic pressure prevail
ing in chamber 19. The two portions 26 and 27 of the
piston move together by reason of the aforesaid ball lock
by the element will not occur until after the signal has
reached the surface of the body of water.
In order that the primer may be ignited, it is necessary
that the chamber 18 be watertight and sealed off from
chamber 19.
This is accomplished elfectively by the
aforesaid flexible bellows 37 sealed at one end to the
bulkhead 20 and at the other end to the iiange 35 which
as heretofore set forth is secured to the piston rod 26
as at 36.
When the
valve means 44 becomes fully opened, the locking dog
43 is withdrawn from the path of travel of the piston 25.
Although the signal may be launched at depths in ex
20
ing arrangement.
As the piston continues to move the flanged portion
In the operation of the device, the signal and fuze as
82 thereof adjacent the striker 7@ is moved into align
sembly is placed in the launching tube and the pin 4@ is
ment with the slot ’77 whereupon the sector plate 65 is
removed. Since the guide shoe is ñtted snugly within
released for rotation to an armed position by the spring
the portion 58 of the T-shaped slot and the overhanging
end of latch 56 is fitted in the restricted portion 5@ of 25 66. Upon rotation of the sector plate 65 clockwise
about the shaft 64 the holder or sleeve 72 containing the
the aforesaid slot formed in the wall of the launching
primer charge 71 is brought into line with the tiring pin.
tube, the shoe and latch are held immobilized. The
As the signal approaches the surface of the body of
spring 53 is held compressed by the shoe 51 which over
comes the force of spring 54 thereby effecting sealing of
water, the external hydraulic pressure falls to a value of
valve head 46 with respect to the seat 47. It will be 30 approximately O p.s.i. and accordingly, the pressure within
chamber 19 likewise falls. At substantially the same
understood, however, that after the lbreech of the launch
time, the elfective force of the spring 39 and the bellows
ing tube is closed a manually operated plunger or a
37 is exerted against the flange 35 whereupon movement
water jet under a pressure of at least 50 p.s.i. greater
of the piston 25 is reversed and thus the piston is moved
than the pressure existing in the tube due to the sub
merged depth of the submarine is utilized to eject the 35 to the left, the two portions 26-27 thereof remaining
locked together by the aforesaid ball type latch. It will
signal and `fuze assembly from the tube.
be understood that a bushing 32 is fabricated of a tough
As has been heretofore mentioned, the stem portion
steel in order to avoid Brinelling by the rolling of the
59 of the T-shaped slot terminates prior to the end of
balls 2S of the latch thereover. As the balls 28 of the
the launching tube while the ilat portion 58 of the slot
is continuous for the entire length of the tube. As the 40 latch approach the enlarged or recessed portion 34 of the
»bushing 32 they move outwardly. When the balls have
signal fuze passes outwardly through the tube, the over
moved sufficiently to be in alignment with the recess 34
hanging portion of the latch 56 engages the closed end
of bushing 32, the firing pin 27 is released from the rod
of slot 59 whereupon the latch is rotated in a clockwise
like portion 26 of the piston. When this occurs, the
direction at the termination of the restricted portion 59
firing pin is forcible moved forwardly under the influence
of the slot 57. As the latch rotates about its axis 61, the
pin 62 is withdrawn from recess 63 formed in the body 45 of spring 39 and thus the striker ’ill is forcibly driven into
ñring engagement with the combination primer, delay
of the device. When this occurs the guide shoe 51 is
and relay element 71 resulting in the deñagration and de
freed for rotation about the axis 61. As the device moves
beyond the discharge end of launching tube, the guide
tonation of that element which causes the rupture of
shoe is moved in a clockwise direction by spring 53 and
the thin wall 99 leading into the main body 14 of the
the external valve means 44 arranged on one end of the 50 pyrotechm'c signal and firing of the charge 101.
Having described the mechanical arrangement and mode
locking dog 43 is freed for subsequent movement under
of operation of a device constructed according to this
the control of spring 54 and the external pressure.
invention, attention is called to the following features
Since the signal 11 has a positive buoyancy it will
speciiic and unique to the device.
iloat to the surface of the water after leaving the launch
Through the mechanical means whereby the guide shoe
ing tube. It will be understood, however, that at depths 55
51 is held adjacent to the body of the device and the
whereupon the pressure of the surrounding water is in
combined valve arrangement 44 and dog 43 is held in a
excess of approximately 50 p.s.i., the force exerted by
position within an annular groove formed in the rod-like
the spring 54 will be overcome by the pressure of the
portion of piston 26, the device is held in an unarmed
surrounding water and thus the valve means 44 will be
held closed by the external water pressure. As the device 60 state at all times until the guide shoe is released for
approaches the surface of the body of Water the ex
rotation.
ternal water pressure decreases to a value less than 50
p.s.i. When this occurs the valve means begins to open
under the influence of the force exerted thereon by
Through the mechanical means whereby the delay ele
ment 71 is held out of alignment with respect to the tiring
pin 27, the device being held in an unarmed state at all
spring 54. Accordingly, water is admitted by way of well 65 times until the ñange 35 is subjected to a hydraulically
45, transverse ports 5S and thence through a passage
derived force exerted thereon by the flexible bellows 37.
41 to the interior of chamber 19 whereupon a hydraulic
Through the mechanical means whereby the piston 25
pressure is built up within the chamber and directed
must
be moved first in one direction to bring the delay
against the ñange 35 of the bellows arrangement. When
valve means 44 is moved to an open position by the spring 70 element 71 in alignment with the fir-ing pin 27 and then
in the opposite direction for a predetermined amount, or
54, the locking dog 43 is moved sufficiently to be with
distance, before the firing pin 27 is released, a distinct
drawn from the groove 42 formed in the portion 26 of
sequence of operation is established and the device is
the tiring pin assembly and thus releasing the piston for
held in an unarmed condition until such a sequence of
movement in response to a predetermined hydraulic pres
75 operation is completed.
sure which thereafter builds up in chamber 19.
7
8
Through the unique and distinct sequence of pressures
required to move the firing pin 27 and the delay element
71 into firing position, a premature firing of the signal
within the launching tube is prevented. Conversely, since
pressure applied thereto, pressure actuated valve means,
the water entry valve 44 is held closed at all times while
the device is in the launching tube, the device may be
safety withdrawn from the launching tube breech if the
device should not be expelled from the tube by the normal
means including a valve arranged on the casing in com
munication with said lchamber for admitting said pressure
into the chamber, a pyrotechnic element disposed within
the arming means and movable into alignment with the
firing means as the arming means is moved to said armed
position, means on the tiring means for forcibly driving the
ñring means into firing engagement with said pyrotechnic
element as the ñring means is released thereby to fire
launching procedure.
Through the use of an elongated guide shoe 51 of 10 the expellant charge, and means including a pair of de
tents for releasing the tiring means when the pressure
suflicient length to breach the inlet for entry of the iluid
in the `chamber has been reduced to a predetermined value.
medium by means of which ,the device is ejected from
3. A fuze suitable for use with an ejector type sub
the launching tube, premature opening of the valve ar
marine signal adapted to be launched in a body of water
rangement 44 while the device is within the launching
and comprising a casing having a pressure chamber
tube is prevented.
therein, pressure responsive means arranged within said
Through the use of a delay element 7l having known
casing in communication with said chamber and the sur
pyrotechnic characteristics, a time factor is introduced
rounding water for `admitting pressure into the chamber
just prior to »the actual ñring of the signal suñicient t0
as the signal is launched and the pressure of the water
enable the signal to come to a state of rest on the sur
face of the water. The element 71 also gives sufficient 20 has been reduced to a predetermined value, normally
locked rotatable arming means axially arranged within
delay such that initiation of the delay element may nor
said casing and rotatable from an initial safe axial posi
mally occur far enough below the surface of the body
tion to an armed axial position when released, ñr
of water to give reliable initiation under normal con
ing means for locking the arming means in said initial
ditions.
Through the use of a frangible seal 99 the arming 25 safe position and for releasing the arming means for
rotation to said armed position when the firing means
and tiring mechanism is maintained `completely enclosed
is moved a predetermined amount, means secured to
within the body 13 at all times whether the same be
said tiring means and actuated in response to the pres
mounted in the signal body proper or stored or being
sure within said chamber for moving the ñring means
carried separately.
Obviously many modifications and variations of the 30 said predetermined amount, means on said arming means
for rotating the arming means to said armed position as
present invention are possible in the light of the above
the arming means is released, a pyrotechnic element dis
teachings. It is therefore to be understood that within
posed within the arming means and movable into align
the scope of the appended claims the invention may be
ment with the firing means as the arming means is ro
practiced otherwise than as specifically described.
What is claimed as new and desired to be secured by 35 tated to an armed position, means operatively connected
to said firing means for releasing the firing means when
Letters Patent in the United States is:
l. A device for firing a pyrotechnic charge comprising
a casing having a pressure chamber therein, normally
locked firing means axially arranged within said casing,
arming means axially arranged within said casing releas
the pressure in said chamber has been reduced to a
predetermined value, and resilient means operatively
connected to said tiring means for forcibly driving the
firing means into tiring engagement with said pyro
technic element as the firing means is released thereby
ably secured to said tiring means for rotation from an
to lire the element.
initial safe `axial position to an armed axial position when
4. A fuze suitable for use with an ejector type sub
released, means on said firing means for releasing the
marine signal adapted to be launched in a body of Water
arming means for rotation from said initial safe position
to said armed position when the firing means has been 45 beneath the surface thereof and comprising a casing hav
ing a pressure chamber therein, normally sealed valve
moved a predetermined amount, means secured to the
means arranged within said casing in communication
firing means and disposed within said pressure chamber
with said chamber and the surrounding water, means
for moving the firing means said predetermined amount
operatively connected to said valve for unsealing the
in response to a predetermined pressure applied thereto,
pressure controlled valve means on said `casing for admit 50 valve when the pressure of the surrounding Water has
been reduced to a predetermined value resulting from
ting the pressure into said chamber, pyrotechnic initiating
the approach of the signal toward the surface of said
means arranged within said arming means and movable
water, means for admitting pressure into said chamber
into alignment with the tiring means as the arming means
as the valve is unsealed, normally locked rotatable arm
is moved to said armed position, means on the firing
means for forcibly driving the firing means into firing 55 ing means axially arranged within the casing and ro
tatable from an initial safe axial position to an armed
engagement with said initiating means as the firing means
is released thereby tto Íire the pyrotechnic charge, and
‘axial position when released, normally locked firing
means in said initial safe position and for releasing «the
posed Within the arming means and movable into align
means arranged within said casing, means on said firing
means for releasing the tiring means when the pressure
means for locking the arming means in said initial safe
in the chamber has been reduced to a predetermined
position
and for releasing the arming means for rotation
value.
60 to said armed position when the firing means is moved
2. A device for firing an expellant ycharge comprising
a predetermined amount, a pressure responsive device
a casing having a pressure chamber therein, normally
secured to said firing means and actuated in response
locked arming means axially arranged Within said casing
to
the pressure within said chamber for moving the lir
and movable from an initial safe axial position to an
ing means said predetermined amount, a resilient ele
Iarmed axial position when released, normally locked fir 65 ment
operatively connected to said arming means for
ing means axially arranged within said casing, a protuber
rotating
the arming means to said armed position as
ance formed on said arming means, protuberance engaging
the arming means is released, a pyrotechnic element dis
means on said ñring means for maintaining the arming
arming means for movement to said armed position as 70 ment with said ñring means as the arming means is ro
tated to an armed position, means in engagement with
the engaging means is moved out of engagement with said
protuberance, pressure responsive means disposed Within
said pressure responsive device for releasing the firing
said chamber for moving said firing means an amount
sufficient to cause said engaging means to be disengaged
means when the pressure within the chamber and on said
pressure responsive device has been reduced to a pre
from said protuberance in response to a predetermined 75 determined value, and means operatively connected to
3,048,111
said tiring means for forcibly driving the firing means
into firing engagement with the pyrotechnic element as
the tiring means is released thereby to fire the element.
response to a predetermined pressure applied thereto, a
resilient element loperatively connected to said arming
means for rotating the arming means to said armed posi
5. A fuze suitable -for use with an ejector type sub
marine signal adapted to be launched in a body of Water
tion as the arming means is released, .a pyro-technic ele
ment disposed Within the arming means and movable into
alignment With said ñring means as the arming means is
rotated to said armed position, means secured to said
beneath the surface thereof and comprising a casing,
said casing having a pressure chamber formed therein,
valve means normally sealed to said casing in communi
cation with said chamber and the surrounding water,
means including a shoe in engagement With said valve
casing for rotatably supporting said arming means, m-eans
including a pair of locking devices releasably connected
to said :firing means for releasing the firing means when
the pressure within said chamber and the pressure on the
pressure responsve device has been reduced to a predeter
mined v-alue eiîective as the signal approaches the sur
face of the Water, and means operatively connected to
means Afor maintaining the valve means sealed to the
casing until the signal has been launched in the body
of water, resilient means operatively connected to said
valve means for unsealing the valve means when the
pressure of the surrounding Water has been reduced to
the ñring means 4for yforcibly `driving «the firing means into
firing engagement with the pyrotechnic element as the
iiring means is released thereby to lire the element.
a predetermined value resulting from the approach of
the signal toward the surface of said Water, port means
in said casing for admitting pressure into said chamber
as the valve means is unsealed, normally locked ar-ming
7. A fuze suitable for use with an ejector type sub
marine signal adapted to be launched in a body of Water
means arranged within the casing and rotatable to an 20 beneath the surface thereof and comprising a casing hav
ing a pressure chamber therein, valve means normally
armed position when released, normally locked firing
sealed to said casing in communication With said cham
means arranged Within the casing, means on said ñring
ber land the surrounding Water, means including a shoe
means lfor locking the arming means in an initial safe
in engagement -With said valve means for main-taining the
position and -for releasing the -arming means for rotation
to said -armed position when the firing means is moved 25 valve means sealed to said casing until the signal has
been launched in the `body of Water, means operatively
a predetermined amount, a pressure responsive device
connected to said valve means for unsealing the valve
secured to said ñring means and actuated in response to
means when the pressure of the surrounding Water has
the pressure Within said chamber vfor moving the firing
been reduced to a predetermined Value effective when
means said predetermined amount, a resilient element
operatively connected to said arming means for rotat 30 the signal device reaches a predetermined depth Within
the Water, por-t mea-ns in said casing `for admitting pres
ing the 'arming means to said armed position as the arm
sure into the chamber as the valve is unsealed, a sleeve
ing means is released, a pyrotechnic element disposed
releasably locked Within said casing, means on said valve
within the arming means and movable into alignment
means -for releasing said sleeve for sliding movement,
with said firing -means as the arming means is rotated
to said armed position, means including a pair of detents 35 within said casing as the valve means is unsealed, tiring
means releasably locked to said sleeve, means including
releasably connected to said firing means for releasing
a pair of locking devices for releasably locking the tiring
the firing means when the pressure within said chamber
means -to the sleeve as the firing means and sleeve are
and the pressure on said pressure responsive device has
moved a predetermined amount in one direction, a pres
been reduced to a predetermined value as the signal
approaches the surface of the Water, and means opera 40 sure responsive device secured .to said sleeve and actuated
in response to the initial pressure within the chamber for
tively connected to -said firing means for forcibly driving
moving the firing means and sleeve said predetermined
the firing means into firing engagement with the pyro
amount in one direction, normally locked arming means
technic element as the firing means is released thereby
arranged Within `the casing and rotatable from an initial
to lire the element.
6. A fuze suitable for use with an ejector type swb 45 safe position to an armed position when released, means
on said tiring means for locking the arming means in
marine signal adapted to be launched in a body of water
said initial safe position and 'for releasing the arming
beneath the surface thereof and comprising a casing hav
means for rotation to said armed position as the firing
ing a pressure chamber therein, valve means normally
means .and sleeve are moved said predetermined amount
sealed to said casing in communication with said cham
ber and the surrounding Water, a normally locked shoe 50 in one direction, means for rotating said arming means
to said armed position, a pyrotechnic element disposed
in egagement -With said valve means for maintaining the
within the arming means and movable into alignment
valve means sealed to the casing, means lin engagement
with said ñring means as the arming means is rotated
with said shoe for releasing the valve means as the signal
to said armed position, locking device releasing means
is Ilaunched in said body of water, means operatively con
nected to said valve means for unsealing the valve when 55 in the casing for releasing said ñring means `from the
sleeve as the ñring means and sleeve are moved a prede
the pressure of »the surrounding Water has been reduced
termined amount in the other direction elîective as the
=to a predetermined value resulting from the approach of
pressure Within the chamber has been reduced to a pre
the signal toward the surface of said Water, port means
determined value, and means operatively connected to the
in the casing in communication fwith the surrounding
Water as the valve means is unsealed for admitting pres
60 tiring means for forcibly driving the 4tiring means into
sure into said chamber, normally locked arming means
arranged within the casing and rotatable to an armed
position when released, normally locked firing means ar
ranged Within the casing, means including a collar on said
ñring means in engagement with said arming means ‘for 65
locking lthe arm-ing means in an initial safe position and
adapted to release the arming means for rotation to said
armed position fwhen the ñring means is moved a prede
termined amount sufficient to disengage the collar Ifrom
said arming means, a pressure responsive device disposed 70
Within said chamber and secured to said ñring means for
moving the firing means said predetermined amount in
ñring engagement with said pyrotechnic element as said
tiring means is released thereby to fire said element.
References Cited in the tile of this patent
UNITED STATES PATENTS
2,505,000
Moore ______________ __ Apr. 25, 1950
2,513,185
Lauritsen ___________ ___ June 27, 1950
2,764,090
Turlay ______________ _.. Sept. 25, 1956
FOREIGN PATENTS
257,335
Great Britain __,__.__.__,__ Aug. 27, 1926
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