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Патент USA US2405932

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‘ Aug" 20, m6.
L. D. ALDERMAN
2,405,932
STARTING MECHANISM FOR TORPEDOES
Filed March 31, 1945
[111/622 for
Leon D/Ha/er'man
Patented Aug. 20, 1946
2,405,932
UNITED STATES PATENT OFFICE
2,405,932
STARTING MECHANISM FOR TORPEDOES
Leon D. Alderman, Beverly, Mass., assignor to
United Shoe Machinery Corporation, Fleming
ton, N. 1., a corporation of New Jersey
'Application March 31, 1945, Serial No. 585,864 '
8 Claims.
(Cl. 114-20)
2
This invention relates to torpedoes and more
stern portion of which is illustrated herein. In
particularly to torpedoes adapted to be released
the stern portion of the torpedo is secured a jet
from aircraft.
tube I2 having a restricted portion 54 for the
An object of this invention is to provide im
rearward passage of gases emitted from the burn
proved mechanism for initiating operation of the
ing of a charge of propelling fuel carried within
propelling means of the torpedo upon impact of
the torpedo forwardly of the entrance of the jet
the torpedo with the water. More speci?cally it
tube.
is- an object of the invention to provide improved
Threaded onto the exit end of the tube I2 is a
mechanism located in the jet tube of a jet pro
ring I5 carrying shear pins l8 by which a cap
pelled torpedo for igniting the propelling charge 10 til is releasably held at the outlet end of the tube.
of the torpedo in response to deceleration of the
Secured to the cap and extending forwardly there
torpedo upon its impact with the water.
of is a small tube 22 which extends centrally of
In the accomplishment of the above and in ac
the jet tube and terminates just rearwardly of
cordance with a feature of the invention, at the
the entrance thereof adjacent to a charge of
outlet end of the jet tube is mounted a, cap, hous 15 powder 24 arranged upon ignition thereof to
ing an inertia block normally held in a central
ignite the propelling charge in the torpedo located
position. When the torpedo hits the water this
directly ahead of the powder charge 24. The
inertia block moves, regardless of the position of
tube 22 carries a rubber locating plug Zia‘ which
the torpedo upon its entrance into the water, to
engages the Walls of the passageway through the
release a latch which normally locks a hammer in 20 jet tube 12 at the restriction M. Upon ignition
retracted position against the force of a spring.
of the powder charge 255, the plug is consumed
Upon the release of the latch the hammer sets off
by the intense heat created or forced back on the
a fuse, burning gases from which pass through a
tube 22 by the pressure created, which pressure
small tube which extends centrally of the jet tube
is exerted on the inner side of the cap 28 where
and which with the fuse and associated mecha
upon the cap and the mechanism to be described
nism is carried by the cap. The cap in turn is
which is carried thereby is ejected from the jet
secured to the outlet end of the jet tube by shear
tube, the shear pins 18 rupturing under the force
pins. Forwardly of and adjacent to the small tube
created by the pressure.
is a charge of powder which is ignited by the
For igniting the powder charge 24 a pair of
burning gases exhausted from the tube and this
fuses 23 are housed in a casing 30 at the rear end
in turn ignites the propelling charge. A rubber
of the tube 22. These fuses each include a primer
plug is carried by the small tube at the restricted
32 arranged to be set off by a ?ring pin 34 to
portion of the jet tube to support the forward
ignite a slow burning powder 36 which in turn
end of the small tube centrally of the jet tube.
ignites a charge of ?ash powder 38. Burning
This plug is immediately consumed by the in
gases from the charge of ?ash powder in each
tense heat created by the ignition of the booster
charge or forced back on the tube 22 by the pres
sure created, which pressure acts on the inner
side of the cap to force the tube and cap rear
fuse pass through the tube 22 thereby to ignite
the powder charge 24.
For operating the ?ring pins 36 a hammer $8
is mounted for sliding movement in a casing 42
wardly, the shear pins rupturing whereupon the
rearwardly of the ?ring pins 34, the casing 42
entire initiator mechanism is ejected clear of the
being secured to the forward portion of the cap
The hammer is urged forwardly by a spring
to exert a blow on the ?ring pins 34 but the
jet tube.
The above and other features of the invention,
together with various details of construction and
hammer is normally held in retracted position
novel combinations of parts, will now be more 45 as illustrated until the torpedo has struck the
particularly described in detail by reference to
water after being released from an aircraft. For
the accompanying drawing and pointed out in the
purpose the hammer 49 is carried by a rear
claims.
In the drawing,
Fig. 1 is a longitudinal section through one form -.
wardly extending stem 45 having a shouldered
portion t8 arranged to be engaged by a latch 50
pivoted at 52 in the cap ‘it and normally held in
of apparatus in which the invention is embodied,
looking position by a compression spring 54. The
and
Fig. 2 is a section on the line II—II of Fig. l.
The invention is illustrated herein as embodied
in a torpedo having a body portion it, only the 55
latch 5Q is connected by a link 55 to a lever 58
pivoted at 56 in the cap 29 and having a head
62 engageable with a conical depression in an
inertia block 84 which is normally maintained
2,405,932
3
in a central position in the cap 20 on a conical
support 66 secured in the outer end of the cap.
The spring 54, in addition to maintaining the
latch 50 in looking engagement with the stem
45 of the hammer 40, also acts through the head
62 to maintain the inertia block in its central
4
the propellant passes, means in said tube oper
ative in response to deceleration of the torpedo
upon hitting the water for igniting said propel
lant, said means being constructed and arranged
to be expelled from the torpedo to provide an
unobstructed passageway for the propellant.
3. In a torpedo containing a charge of propel
position.
ling fuel which upon burning-emits gases which
The lever 58 is locked in the position shown in
pass rearwardly from the torpedo, said torpedo
Fig. 1, until it is desired to use the torpedo, by
a locking pin 68 passing through the lever 53 and 10 having a passageway in its after portion pro
vided with a restriction through which the burn
through the cap 29 as shown in Fig. 2 thereby
ing gases pass to provide a jet for propelling
preventing accidental, premature ignition of the
the torpedo, means in said passageway for ig
fuel charge. One end of the pin 68 carries a head
hiting said charge of propelling fuel in response
10 engaged by a compression spring 12 con?ned
to impact of the torpedo with the water, and
in an outwardly extending boss 14 of the cap
means for releasably securing said last named
to urge the locking pin toward the right as viewed
means in said passageway whereby it is blown
in Fig. 2 out of engagement with the lever 58.
therefrom during ignition of said charge thereby
A cotter pin 16 passes through the pin 68 at its
to clear said passageway.
other end thereby to prevent removal of the pin by
4. In a torpedo containing a charge of propel
the spring ‘I2. A cap 18 encloses the end of the 20
ling fuel which upon burning emits gases which
pin containing the cotter pin 16. When the
pass rearwardly from the torpedo, said torpedo
torpedo is loaded in an aircraft the cap i8 is
having a passageway in its after portion pro
removed and a wire attached to the plane is
vided with a restriction through which the burn
passed through an aperture 80 in the pin 63 and
ing gases pass to provide a jet for propelling the
the cotter pin 16 is removed. The wire holds
torpedo, means for causing ignition of said fuel
the pin 68 in position until the actual release of
charge, a hammer arranged to be moved by a
the torpedo at which time it is withdrawn from
spring to operate said ignition means, a latch
the pin and the spring 12 forces the pin 68 out
cooperating with said hammer to hold the ham
of engagement with the lever 58 so that this lever
may move in response to movement of the inertia 30 mer in retracted position, an inertia block opera
tive in response to deceleration of the torpedo
block 64.
as it strikes the water for releasing said latch,
Upon entrance of the torpedo into the water
and means for releasably mounting said ignition
the inertia block 54 moves in response to the
means, said latch and said inertia block in said
deceleration of the torpedo and regardless of the
direction of movement of this block which will 35 passageway in position to be discharged there
from upon ignition of said fuel charge.
depend upon the manner in which the torpedo
5. In a torpedo having a passageway in its after
enters the water, clockwise movement will be
portion provided with a restriction and a charge
imparted to the lever 58 against the force of the
of propelling fuel which upon burning emits gases
spring 54. Accordingly, the latch 58 is released
from the shouldered portion 418 of the stem 46 40 which pass rearwardly from the passageway to
propel the torpedo, mechanism in said passage
and the spring M forces the hammer 48 into
way operative in response to impact of the tor
engagement with the ?ring pins 34 setting off the
primers 32 and igniting the timing powder 35
which in turn ignites the ?ash powder 38 send
ing a ?ame through the tube 22 to the charge of
powder 24 at the entrance of the jet tube. This
powder now burns igniting the main propelling
charge in the torpedo and exerting a high pres
sure on the forward portion of the cap 20 after
pedowith the water'for igniting said charge of
propelling fuel, shear pins for securing said mech
anism within said passageway, said mechanism
comprising a member responsive to the pressure
created forwardly thereof during ignition of said
fuel charge for causing rupture of said pins and
discharge of said mechanism from the passage
way.
the plug 26 is consumed by the intense heat or
6. In a torpedo having a passageway in its after
forced rearwardly on the tube 22, whereupon
portion provided with a restriction and a charge
the shear pins i8 rupture and the cap 20 and
of propelling fuel which upon burning emits
the mechanism carried thereby is expelled rear
gases which pass rearwardly from the passage
wardly from the jet tube. The tube is now clear
of any restrictions which would impede the flow 55 way to propel the torpedo, a powder charge at
the entrance of said passageway positioned to
of propelling gases through the jet tube where
ignite said fuel when the powder charge is ignited,
upon the torpedo is propelled through the water
means in the outer end of said passageway for ,
toward its target.
igniting said powder charge in response to im
Having thus described the invention, what I
pact of the torpedo with the water, and means
claim as new and desire to secure by Letters
mounting said ignition means in said passage
Patent of the United States is:
way and responsive to the pressure created for
1. In a torpedo adapted to be released from
wardly thereof upon ignition of the powder
an aircraft and containing a fuel charge arranged
charge for expelling said ignition means from the
upon ignition to propel the torpedo, means for
causing ignition of said fuel charge, a member 65 passageway.
7. In a torpedo having a passageway in its after
spring-urged toward operative position for oper
portion provided with a restriction and a charge
ating said ignition means, a latch holding said
of propelling fuel which upon burning emits gases
member in retracted position, and an inertia block
which pass rearwardly from the passageway to
operative upon impact of the torpedo with the
water for releasing said latch.
70 propel the torpedo, a fuse in the outer end of said
passageway, mechanism rearwardly of said fuse
2. In a jet propelled torpedo adapted to be
for setting off the fuse in response to impact of
dropped from an aircraft and provided with a
the torpedo with the water, a tube extending
fuel charge which upon ignition emits a pro
forwardly of the passageway from said fuse for
pellant from the stern of the torpedo, said tor
pedo having a jet tube in its stern through which 75 the passage of burning gases, a powder charge in
2,405,932
5
6
the forward end of the passageway arranged to be
ignited by the burning gases from the fuse and
to ignite the fuel charge, and means releasably
it into ?ring position, a latch for locking said
hammer in retracted position and arranged upon
movement of said inertia block caused by decel
eration of the torpedo when it enters the water
for releasing said latch, a powder charge located
in the forward portion of said passageway for
igniting said fuel charge, a tube extending from
said fuse to said powder charge to conduct the
burning gases from the fuse to ignite the powder
charge, said tube being carried by said cap, and
mounting said fuse, tube and mechanism as a unit
in the passageway, said means including a mem
ber obstructing the passageway whereupon the
pressure built up forwardly of said member upon
burning of the powder charge forces the unit
from said passageway.
8. In a torpedo containing a fuel charge which
1,"
upon ignition emits gases which pass rearwardly
a rubber locating member carried by said tube
from the torpedo, said torpedo having a passage
at the restricted portion of said passageway rear
way in its after portion provided with a restric
wardly of the powder charge, said member being
tion through which the burning gases pass to pro
consumable by the intense heat created when the
vide a jet for propelling the torpedo, a cap at the 15 powder charge is ignited, the pressure created
by ignition of the powder charge acting on said
outer end of said passageway, shear pins for re
cap to rupture saidnshear pins and ejectrthe cap
leasably securing said cap in the outer’ end of’
and the parts carried thereby from the passage
fuse carried by said cap forwardly of said inertia
way.
block, a hammer engageable with said fuse for 20
LEON D. ALDERMAN.
said passageway, an inertia block in said cap, a
?ring it, a spring acting on said hammer to move
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