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Патент USA US2411432

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Nov. 19, 1946.
Filed April 10, 1944
4 Sheets-Sheet l
- 1112"“
Nov. 19, 1946.
Filed April 10, 1944
4 Sheets-Sheet .2
. .9
k {5
>N0v. i9, 1946.
Filed April 10, 1944
4 Sheets-Sheet 3
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Attorney 8
Nov. 19, 1946.
2,41 1,432
Filed April 10, 1944
4 Sheets-Sheet 4
Patented Nov. 1%, 1945
.iack Ember, Greenford, England
Application April 10, 1944, Serial No. 530,344
In Great Britain May 31, 1943
9 Claims. (01. 102-72)
This invention relates to bombs, pyrotechnic
devices and the like constructed for dropping
from aircraft, Such projectiles may be secured
together in clusters so that, when released, the
individual projectiles are merely scattered from
the height at which the cluster leaves the air
craft. By this method it is extremely di?icult to
ensure that bombs will strike any particular tar
‘which totally encloses the ?ares 1 whose ends are
engaged by sockets 3 in a head 1i of the casing
and by sockets 5 ?xed to a tail plate 6 of the
The head of the casing consists oi a dome
shaped cover ll, as shown in Fig. 2, whose inner
‘portion is ?xed around a dished location plate ‘I
in which the aforesaid sockets 3 are mounted.
Fixed centrally in the cover 4 is a delay action ig
get or that ?ares will illuminate a desired area
and in a prior application Ser. No. 529,786, ?led 10 nition device 3 adapted to be actuated automati~
cally or otherwise in known manner as the as
April 6, 1944, we have described means whereby
sembly leaves the aircraft. The ignition device
a cluster of ‘combs, ?ares or the like can be caused
8 may consist of any known type of iuze designed
to fall as a unit and to be released for dispersion
to ignite and operate durin<T passage through the
at a predetermined height above ground.
air and a suitable fuze for this purpose is, for eX
The object of the present invention is to ap
ample, that described in a prior application, Ser.
ply the principle described in our prior applica
No, 479,366, ?led March 16, 1943. The ignition
tion to operate the release of a cluster and at the
device 8 is screw threaded into a socket 9 mount
same instant to- ignite any or all of the projec
ed upon a central support IE! ?xed at the centre
tiles forming part of the said cluster.
According to the invention an assembly of pro 20 of the plate '1 and surrounding the central socket
3 (see Fig. 3) and from the socket 9 there extends
jectiles includes end retaining elements adapted
in radial directions, as shown in Fig. 3, a number
to engage said projectiles, detachable intercon
of ?ash tubes H which terminate immediately
necting elements disposed between said retain
above ignition devices l2 mounted in the ends of
ing elements to hold the assembly together as a
unit, and a common ignition device adapted to 25 the ?ares I, the arrangement being such that
"the ?ash from the ends of the tubes 1 i will cross
ignite the iuzes of the projectiles and/or actuate
the intervening space and ignite the devices l2. ‘
means for removing said interconnecting ele
The central ignition device i2 is adapted to be
ments'to enable the projectiles to be dispersed,
ignited from a ?ash ori?ce 2i situated central
According to the preferred form of the inven
ly in the underside of the socket 9. Additional
tion means for use in forming a cluster of bombs,
?ash tubes E3 connect the socket 9 with cylinders
pyrotechnic devices or the like are provided com
Ill fixed to the under or inner side of the plate
prising head and tail elements formed or pro
1 and each containing a propellant charge lb.
vided with means to engage the ends of the bombs
The clamping together of the components‘ of the
or the like, retaining members adapted to con
nect said elements, devices operated by propel 35 assembly in the manner described forces the
heads of the ?ares i into close engagement with
lant explosive to disconnect said retaining mem
the sockets 3 which are formed each with a cy
bers and a common delay action ignition device
lindrical extension 39 passing through the plate
for initiating the release of said retaining mem
1 to allow the ignition devices it of the ?ares to
Reference will now be made to the accompany 40 project into the closed chamber formed within
the cover 4. The ends of the ?ash tubes l I there
ing drawings which illustrate examples of con
by open into a con?ned space so that the ?ashes
structions according to the invention and in
therefrom cannot affect any other part of the
Fig. l is an outside elevation of a flare cluster
ready for release,
Fig. 2 is a sectional elevation of the arrange
ment shown in Fig. 1,
Fig. 3 is a plan of the arrangement shown in
Figs. 1 and 2 with the top cover removed,
Fig. 4 is a view showing the break-up of the
assembly illustrated in Figs. 1 and 2,
Fig. 5 is a part sectional plan of a modi?ed are
rangement, and
A cylindrical plunger It engages frictionally
in each cylinder it and is attached to one end
of a bar ll of which there are three in the
construction illustrated extending substantially
throughout the length of the cylindrical portion
of the assembly with their opposite ends hingedly
connected to metal eyes it ?xed by their ends
‘I9 engaging in the tail plate 6. The assembly
illustrated is adapted to be suspended from the
aircraft by means of an eye 28 ?xed to or formed
Fig. 6 is a sectional elevation showing the, head
55 integral with a T-section bar 2i whose end 22
of the arrangement shown in Fig. 5.
projects through the plate ‘7 and whose end
Referring ?rst to Figs. 1, 2v and 3 seven para
23 projects through the tail plate 6. The bar
chute ?ares I are disposed to form a cluster with
2! thus forms a connecting element extending
in a sectional casing made up of a number of
throughout the assembly which is made a rigid
partially cylindrical panels 2 which form on as
sembly a cylindrical casing as shown in Fig. 1, 60 one by tighteningnuts 24 on the ends 19 of the
eyes 18 after the components have been assem
bled in the manner shown in Fig. 2. The tail
plate 6 is provided with tail fins 25 mounted on
necting said ignition device with said cylinders
a tail unit 26 of ordinary form so that the assem
bly as a whole, after it leaves the aircraft will
fall through the air as though it were a single
ing plungers engaging in said cylinders, cylin
bomb or flare.
The operation of the arrangement above de
scribed is as follows:
The central ignition device 8 is ignited as or 10
after the assembly leaves the aircraft, and is set
so that after a predetermined time delay has
elapsed since it left the aircraft, an explosion
in the fuze chamber of the device 8 will cause a
?ash to pass through all the tubes H and i3
and ori?ce 2? to ignite the fuzes E2 of the flares
and also to explode the propellant charges it
in the cylinders [4 so that the plungers it are
mounted on said head casing, ?ash tubes con
and with the ignition means of the aerial devices,
retaining bars hinged to said tail plate and carry~
drical casing components held in position by said
retaining bars, and a bar adapted to connect the
head casing and tail plate and carrying means
for suspending the cluster from an aircraft.
2. An assembly of aerial devices having fuzes
for igniting, them and adapted to be dropped from
an aircraft, including end retaining elements
adapted to engage the ends of said aerial devices,
detachable interconnecting elements disposed be
tween said end retaining elements to hold the as
sembly together as a unit, means for igniting the
fuzes of said aerial devices, a propellant explosive
carried by the assembly, devices adapted to be ac
tuated by the propellant explosive to remove said
forced radially outwards moving the bars if also
radially outwards about their points of connec 20 interconnecting elements and enable said aerial
tion to the hinged members it. This operation
devices to disperse, and common ignition means
disconnects the top cover 4 of the assembly from
for said fuzes and for detonating said propellant
the tail plate 5 so that the various components
of the assembly commence to fall apart. This
3. Means for use in forming a cluster of aerial
operation is illustrated by Fig. /l wherein it will 25 devices having fuzes for igniting them and
be seen that the bars 2? have swung to approx
adapted to be dropped from an aircraft, includ
imately horizontal positions, the panels 2, being
ing head and tail elements adapted to engage the
freed thereby, have fallen away as separate units
ends of said devices, one of said elements having
so that the flares i have been released from en
cylinders formed therein, retaining members
gagement with the sockets 3 and 5 to fall there
hingedly connected to the other of said elements
after and function as independent units. It
and frictionally engaging the cylinders and nor
Will be understood that the function of the fuse
mally connecting said elements, propellant
8 is to determine the point at which the cluster
charges in said cylinders, and common ignition
will disperse while the function of the fuzes
means for igniting the fuzes of said aerial devices
i2 is to determine when the individual flares will
and for deto-nating the propellant charges to
be ignited. According to requirements the fuzes
‘thereby disconnect the retaining members and
[2 may operate simultaneously or successively.
allow the components of the structure to dis
The arrangement shown in Figs. 5 and 6 is simi
lar in many respects to that illustrated in Figs.
4. An assembly according to claim 2, wherein
1-4 except that there is no central ?are, and, 40 said common ignition means is operable to cause
therefore, no need for the central flash aperture
ignition of said aerial devices simultaneously with
21. rI‘he central ignition device 8 is mounted to
release of said retaining members.
operate in the same manner as already described
with particular reference to Fig. 2, but in Figs. 5
and 6 only two bars ii are employed to lock
the assembly together for discharge purposes.
The four ?ares indicated at 28 are simulta
neously ignited through flash tubes 29 and there
are two ?ash tubes 30 which cause the ejection
of plungers to release the bars ll.
It is to be understood that the function of
the casing panels 2 is protective only and that
they do not form an essential feature of the
invention which could be satisfactorily carried
out with only the connecting bars I7 and 2!
extending between the head and tail compo
The invention is not restricted to the particu
lar application to parachute ?ares described above
5. Means according to claim 3, wherein said
common ignition means comprises a delay action
ignition device situated centrally of said head
element, and flash tubes connecting said ignition
device with the fuzes of a number of said aerial
devices and with said cylinders to explode said
propellant charges therein and thereby discon
nect said retaining members from said head
6. Means according to claim 3, wherein said
retaining members comprise bars hinged to said
tail element and extending parallel to the axis of
the structure, and plungers carried by the heads
of said bars and normally engaging in said cylin
'7. Means according to claim 3, including a bar
extending lengthwise of the structure into en
and illustrated as it can equally be applied to 60 gagement with said head and tail elements and
a cluster of incendiary bombs, for example,
carrying means for suspending the structure from
adapted to ignite on impact with an objective.
an aircraft.
In such an arrangement the ?ash tubes ll would
8. Means according to claim 3, wherein said
be unnecessary and only the flash tubes i3 would
head and tail elements comprise circular plates
be employed to enable the cluster to be dis
formed with locating sockets to engage the ends
persed at a predetermined height above the ob
,of said aerial devices, and including a cover on
said head element to enclose said ignition means,
I claim:
and ?ns on said tail element.
1. A cluster of aerial devices provided with ig
9. Means according to claim 3, including curved
nition means, and supporting means therefor
panels carried by said retaining members and
comprising a head casing having sockets to re
maintained in position thereby to form a cylin
ceive the ends of said aerial devices, a tail plate
drical casing which, in conjunction with said
also provided with reception sockets, a central
head and tail elements, completely encloses said
delay ignition device in said head casing, a num
aerial devices.
ber of cylinders containing propellant charges
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