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Патент USA US2404135

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July 16, M46.
Filed July 51, 1942
2 Sheets-Sheet l
Piaa' ‘7X76 any ,
July 16, 1946.
Filed July 31, 1942
' 2,404,135
2 Sheets-Sheet 2'
. 3.
42 43
Patented July 16, 1946
' 2,404,135
P-iao:Ki-ang;-;Washington; n; o
speneatisnrmy-sr, mrzgserramo. 453206911‘
The. present invention: relates tora fusercone
str-uctionfor explosive projectiles.
It is a principal object of my inventionytosproe
vide a fuse constructiomof the_-set..-hack type espe
cially adapted to be used with smooth. bore ex-.
plosive projectiles of. thenon-rotating. type; such
as, may be used in the smooth bore barrels of.
trench mortars or the like.
It. is a very important object of my invention
to provide a fuse construction which is,-not. only.
bore safe, but. is absolutely safe and maintained
in an unarmed condition. until after the fuse :Wlth
its projectile has reached its..maximum ordinate
and is falling towards the ground.
It, is also an important object of. my, invention
t0~proVide a. fuse construction having. two func-;
tions of either super»quick.. or delayed action.
especially adapted. to be used‘ with. smooth bore
projectiles and havingmeans. for selectively ad.
position. assumed whemtheshell eemnetmre
?gure 44 15-3,, longitudinal?sectiompartly;ineelezw
vation, taken. at. right. angles to Figureqle ands
. showing_ the,- selecting; means- adj-ustedltq select.
adelayed action-tor thef-usez,
Figure. 5: is .l a, horizontal,-. section; takenz. on! the.
line 5.—.5..ofrli’igure.4;
Eigure 6. is. a. fragmentary-V longitudinal section‘
showing thedetails vof..the. selecting; sliderwithtthe-i
slide. locked; in. the. position. tolselectzi a. super
quick action of the fuse;c
~ . J '
Eigu-re 7. is, a. horizontal‘ section. taken», onethe
line ;'I.'—.1f of,‘ Figure, 1',_.fi1r.then illustrating,- these?‘
Eig'ure?daa. horizontal. section takenion the;
Eigure 1.9 is. a..fragmentarya enlarged‘section,
takenQonv the; line . 9.—.9; ofiFfi-gura 15; showing the
justi'ng, the fuse to give either a delayed or a. 20 detailsroi the safety belt: forlocking: the fuse;
super-quick action,, together with. means to. lock.
the, selecting, means in the, selected. position im~
mediat'el‘y upon. the projection of- the fuse-with
its projectile from. the barrel of_the projecting de.Vl'ce.
against} arming, before the. pun‘ action‘ ot, the. fuse;
Reierring, to‘ Figure 7L O?the. drawingaa ~f,use
body‘! is provided withethreadsrlu. ‘for-attache»
ment'eto' anrexplosiveprojectiler At. the: noseen d’.
It is a further. object of'thepresent invention 25 on the body .9,; a.£use=.nose__:ring. I] t of rolledlrn eta};
to provide a fuse construction of the character
is. secured in placetnlretainj a .fusernose cup; 12>
described‘ which is absolutely safe. for, handling.
of thin .met’al.v . 'llhe ifalse'body 9. iepnovided-with;
and storage purposes and". which. is positively.
a longitudinal‘, bore. oivarying dimensions. At‘;
locked; against‘ arming until.“ the. fuse, with. its pro.
I thenose and} the -fusehody, horeis enlarged-asset;
jectile‘ has been projected‘from the barrel'iof the
projecting device and has passed‘ its maximum.
It is also an object of‘ the present‘ ihventionto.
provide a fuse construction especially adapted?
to'be used with smooth bore projectiles..and‘having selected functions of‘ delayed or: super-quick.
action with a simple means for selecting either
of the desired fuse actions merely by a manual;
rotation. of. the fuse body. before. placing. the.» fuse
with its explosive projectile in. the ‘barreLof the.
projecting device.
t3 toprovid'e ashoulder. IA, unon ivhichciscseatedi.
the .?ringl Kiln. cup. 7 IE which.v is. retained‘ in, place.
by the fuse nose cup I2' and ring ll. .- Seated:
with-in thef?ring, pin, cup. ii and. secured. in any
suitable; fashion is a. ?ring: pin. I 6., It, shall-Ida. be;
noted;‘ that‘. the. fuse/nose.- ring; H is‘ secured to;
the body, Biinsuch-mannerestO render theoper-..
atingmeclianisms within the .fusebody completelyair. andrwatertightn
Sliiiahly- positioned within\ the bore l-T-g istrthe:
body. llllknowncass a. primer adapter or. carrier...
Theprimer. < adapter .body. !& is. . provided. with: as
longitudhalfsbore. and‘. seated within the; bore at:
a. central‘point, along ltSa16ngjJh.~. is. the. primer. L91,
ing features are fully enclosed and are. rendered"; 45 Thipri'mer‘ m: is’ retained"in‘ positionj by" the};
threaded collar: 21!). The longitudinal‘ bore? ZJ-of:
completely air-and watertight;
the primer.» adapter. body. “his: constricted:- atitss I
Further objeotsand advan’c-agesiof:v my invem
rearward‘end~ to provide a seat for asaietphalli
tion will be apparent by reference to thezfo-llow-r
2.2. whichnlwhenf in. position, shown» in’. Figs-uresrl
ingrspeci?cation and drawingsinwhichc
Eigure l is a longitudinal. section~ of1 the- fuse? 50 and, zpreventsthe, firing pin- Hi from; striking;
the. primer. iii‘. to, ignite the-fuseriandt thus;
ofimylinventi‘o-ni with the parts lcclsed-in-‘inopere
an unarmedmndition; .
able position to prevent an arming ofrthe fuse;
It is a still further objectof- my invention to;
Drovide a fuse construction in which all operate
Figure 2 is a longitudinal‘ section‘ similar- to
Theprimer adapter, body. L8; Whichiis slidabhp
Figure} butwit'h the-parts shown in thepositi'on 55 nositionedwvithimthebore L1,, is_»normally'lockedr.
againstsliding, movementrim
direction). The‘.
assumed immediately upon projection ofjth'e fuse.
locking: means; is. releasablewby, inentia- 'llQGIlrt‘hQ
and it's projectile from the barrel of” theprojjectl
projection of. the; fuse and‘ its; sheila-from; th'QiQl‘Qr
ing device;
Figure 3' is a longitudinal sectionpartly in ele
jecting, barrel... ‘I10 preventthe- primer adapter‘. 7
body, from slidingglforwardly-e towards, the JIQSBgOf;
vation of‘the fuse, showingihe partsinthearmed. 60 the. fuse" a, locking meanssisfprovideel comprise.
ing a safety ball 23 resting in a groove 24 of the
primer adapter body l8 and also abutting a shoul
der 25 formed on the wall of the bore I‘! in the
projectile from the barrel of the projecting de
vice. With the fuse construction embodying the
locking device of my invention, it is absolutely
safe to store and handle explosive projectiles to
the position shown in Figure 1 of the: drawings, Cl which the fuse has already been ‘attached in a
body 9 of the fuse. With the safety ball 23 in .
it will be seen that the primer adapter body l8
is prevented from sliding forwardly toward the
nose of the fuse.
The locking means to prevent
condition which, upon placing in a projecting de
vice and upon projection to a point past its max
imum ordinate will result in an immediate arm
ing of the fuse.
a sliding movement of the primer adapter body
I have also embodied in the fuse construction
I 8 in a rearward direction towards the main body 10
of my invention, a means for giving either a de
of explosive charge comprises a safety bolt or
layed or super-quick action of the fuse for igni
plunger 26 of circular cross section. The safety
bolt 26 which is maintained in the position shown 1 -.
tion of the explosive charge.
The means for se
lecting either the delayed or super-quick action
in Figure 1 when the fuse is locked and unarmed
is slidably positioned within a bore 2‘! of the 15 of the fuse upon impactis exceedingly simple and
fool-proof and does not necessitate the use of
fuse body 9' and a bore 45 in the delay casing
tedious ?ne adjustments located on the outside
35. Spring ?ngers 28, as shown in detail in
Figure 9 of the drawings, engage against a shoul
of the fuse body.
Referring to Figures 4 through 8 of the‘ draw
der formed by the ?attened surfaces 29 at the
ings, which show the details of the selecting de
end of the'safety bolt 26, thus holding the safety
vice for selectively adjusting the fuse to} give
bolt in the position shown in Figures 1 and 9 of
either a delayed or super-quick action, a bore 33
the drawings and preventing any sliding move
within the body 9 is provided to conduct the
ment of the primer adapter body [8 toward the
?ame from the'exploded primer l9. Positioned
rear of the fuse body. The thickness and the
tensile strength of the spring ?ngers 28 may be 25 within an enlarged bore 34 adjacent to the bore
33 is a body 35 constituting a delay case and.
varied or adjusted to the requirements of the in
housing, the selecting slide and delay powder
dividual fuse with its projectile.
charge, as will be described hereinafter. A thin
Referring to Figure 2 of the drawings, imme
metal plate or safety disc 36 is interposed be
diately upon the projection of the fuse and its
tween the bore 33 and the delay case 35 and func
projectile from the barrel of the projecting de
tions as a gasket responsive to the pressure of the
vice such as a trench mortor or the like, the in
?ame from the primer [9 to seal the delaycase
ertia of the primer adapter body I8 will be suffi
35 with respect to the body 9 of the fuse and pre
cient to overcome the pressure of the spring ?n
vent a, blow-by of ?ame such as would result in
gers 28 against the shoulders formed by ?attened
an immediate explosion of the main explosive
surfaces 29 of the safety bolt 26 and will force
charge even if the fuse is set to ‘a delayed action.
the safety bolt 26 to move rearwardly within the
The disc 36 also is punctured, as shown in Fig
bore 2'! and bore 45 to assume the position shown.
Thus, the primer adapter body l8 will beslid
ures 5 and 9 of the drawings, to form the spring
?ngers 28 for locking the safety bolt 26, as de.-.
40 scribed previously in connection with Figures 1
and 9 of the drawings. Slidably positionedin a.
ings, and in this position will enable the safety
passage in the delay case 35 is the
ball 23 to fall out of the groove,“ and be freed
selecting’ slide 31. The selecting slide 31, as
within the enlarged part 30 of the bore I‘! in
shown in Figures 6 through 8 of the drawings, is
the fuse body 9. Thereafter the fuse will be
in a position to be armed and the primer adapter 45 provided with a bore 38 and an imperforate bore
39. When theslide 3'! is in the position shown
body [8 will be free to slide forwardly towards
rearwardly by inertia within the bore I‘! to as
sume the position shown in Figure 2 of the draw
in Figures 6 and 8 of the drawings, the bore 38
is in alignment with the bore 40 of the delay cas
ing 35 to provide a direct through-passage for
As the fuse and its projectile pass the peak of
its trajectory or its maximum ordinate after be 50 the ?ame from the primer l9 to reach the main
the nose of the fuse when such a directing force
is applied.
ing ?red from a trench mortar or the like and
body of explosive charge. With the parts in this
position providing a direct through-passage for
the ?ame, a super-quick action of the fuse isob
primer adapter body l8, can slide forwardly
For a delayed action the slide is moved to the
within the bore l1 towards the nose of the fuse, 55
position shown in Figures 2, 4, and '7 of the
as shown in Figure 3 of the drawings. Since the
drawings, and when the slide is in this position,
safety ball 22 is no longer resting within the bore
the imperforate bore 39 is in alignment with
2|, the point 3| of the ?ring pin l6 can contact
directly upon the casing 32 of the primer l 9 when , . the bore 48, thus blockng off a direct passage for
the primer adapter body I8 has moved forwardly. to the flame in the chamber 33 to ‘the main body of
explosive charge. The pressure of the ?ame and
Thus the fuse will be armed and upon impact,
is commencing to fall towards the earth, the safe
ty ball 22 will fall out of the bore 2|, and the
the ?ring pin l6 will explode the primer [9 to
ignite the fuse.
I have described thus far a set-back fuse which
is especially intended to be used with explosive
projectiles of the smooth bore or non-revolving
type,rsuch as are used in the barrels of trench
mortars or the like. This fusew construction
which I have described is exceedingly safe, since
the fuse is normally locked to maintain the fuse
in an unarmed condition in which it is absolutely
impossible for the ?ring pin to strike the primer.
However, the locking means for the fuse con
struction as described is releasable by the inertia
obtained upon the projecting of the fuse and its
burning gases within the imperforate bore 39 will
seat the slide tightly within the delay case 35,
_ thus preventing the blow-by of any ?ame such
as would effect a super-quick action of the fuse.
With the passage 49 blocked by the imperforate
bore 39, the ?ame from the primer and in the
bore 33 must pass through the charge of delay
powder 4% and the relay powder 42 to reach the
main body of explosive charge, thus giving arde
layed action to- the fuse. As will be seen in Fig
ure 4 of the drawings, the delay powder 41 is in
the form of a threaded core and is threaded with
in the delay case 35. The threads serve to pre
' vent the displacement of the delay powder by ‘any
rough handling of the fuse. Also, as shown in
Figure 4 of the drawings, the relay powder 42
for conducting the burning ?ame from the delay
powder 4| to the main body of explosive charge
is held in position by the threaded collar 43. It
until the fuse and its projectile are projected
from the barrel of the projecting device. The
locking means, as shown and described, is auto
matically releasable by the forces of inertia ob—
tained when projecting the fuse with its pro
will be seen that when this threaded collar 43 is
jectile from the barrel of the projecting device
removed from the body 9, the relay powder ring
to permit the arming of the fuse by the turning
42 may be removed and the delay case 35 con
over of the fuse with its projectile after passing
taining the slide 31 and delay powder 4! may
its maximum ordinate. The fuse construction
10 which I have invented is also provided with a
likewise be removed for inspection or repairs.
As described above, the slide 31 may be moved
to the position shown in Figure 6 of the drawings
means for giving either a delayed or super-quick
action upon impact and with a simple and easily
to give a super-quick action or may be moved
operable means fOr selecting either the delayed
to the position shown in Figures 2 and 4 to give
or super-quick action. It will be noted that the
a delayed action of the fuse. To move the slide 15 means for selecting either the delayed or super
31, it is only necessary to rotate the fuse and its
quick action of the fuse is operable in response
shell before placing the shell in the barrel of the
to a manual rotation of the fuse body before
projecting device. An indication 44 on the sur
the fuse and its projectile are placed in the bar
face of the fuse body 9 is provided, and it is
rel of the projecting device, and since the se
preferably a depression which may be felt by the 20 lecting operation is so simple, it may be done
operator so that the fuse may be manipulated in
without resort to ?ne adjustments and in total _
total darkness, if necessary. When the fuse is
darkness, with absolute certainty as to the se- ‘
rotated so that the depression 44 is facing up
lected action of the fuse.
ward, the slide will move in response to gravity
It should be understood that while the vfuse
to assume the position shown in Figure 6 of the 25 construction which I have shown and described
drawings and select a super-quick action of the
is particularly adapted to be used with smooth
fuse. When the fuse and projectile are rotated
bore or non-rotating explosive projectiles, the
to a position with the indication 44 facing down
fuse construction as shown and described is also
ward, the slide 31 will be moved in response to
capable of being applied and used to advantage
gravity to the position shown in Figures 1 and 2 30 with rotating projectiles, if desired, since the fuse
of the drawings and select a delayed action for
and the fuse controlling means are responsive to
the fuse.
the forces of inertia as obtained in any explo
The selecting device, as described above, is so
sive projectile immediately upon the projection
designed as to be locked in the selected position
of the projectile from the barrel of the projecting
immediately upon the projection of the fuse and 35 device.
its projectile from the barrel of the projecting de
It is to be understood that the construction
vice. Upon projection of the fuse and its projec
shown and described is merely an illustration of
tile, the set-back inertia of the primer adapter
body I8 is sufficient to force the safety bolt 26 to
the preferred embodiments and that such changes
may be made as fall within the purview of one
move past the spring ?ngers 28 within the bore 40 skilled in the art without departing from the
45 of the delay case 35, as previously described,
spirit of the invention and the scope of the ap
to assume either of the positions shown in Fig
pended claim.
ures 2 and 6 of the drawings. When the selecting
I claim:
slide 31 is in the position shown in Figure 6 of
A shell fuse comprising a body having an axial
the drawings, the safety bolt 26, when moved 45 bore, a carrier slidable in said bore, a primer car
in response to the inertia of the primer adapter
ried by said carrier, a rearwardly projecting ?r
body l8, will be moved through the bore 45 to a
ing pin in the forward end of said bore against
position behind the slide 31, thus preventing any
which the carrier is adapted to carry the primer,
further movement of the slide 31 and locking the
means normally locking said carrier against for- 7
slide in the selected position to give super-quick 50 Ward movement in said bore intermediate the
action of the fuse. If the slide is in the selected
ends of the latter and with the primer spaced
position, as shown in Figure 2 of the drawings,
from the ?ring pin, said locking means being
for giving a delayed action of the fuse, the
released to permit such forward movement upon
safety bolt 26 will pass, when moved in response
relative rearward movement of said carrier in
to the inertia of member l8, through the bore 38 55 said bore due to set-back inertia, said body de
in the slide to lock the slide in this selected posi
?ning a pair of axially extending ?ring paths
tion of delayed action. It should be noted that
behind the primer and a transverse passage in
the safety bolt 26 is of circular cross section with
tersecting one of said paths, control means free
the exception of the ?attened end surfaces 29,
ly slidable in said channel by gravity between
and that when the safety bolt 23 is moved to the 60 blocking and freeing positions with respect to
position shown in Figures 2 and 6 of the drawings,
said one of said paths, a plunger mounted in
the spring ?ngers 28 will frictionally grip the
said body for relative axial sliding movement,
enlarged circular cross section of the safety bolt
and means holding said plunger in a normal po
26, so that the safety bolt 26 cannot thereafter
sition wherein said plunger engages said carrier
be moved, and thus assuring that the selecting 65 to hold said carrier in its normal position, said
slide 31 will remain locked in the desired posi
holding means being released due to set-back
inertia of said plunger and carrier so that said
I have shown and described a fuse for explo
plunger and carrier move relatively rearwardly
sive projectiles especially adapted to be used with
with respect to said body to positions wherein
smooth bore or non-rotating projectiles which 70 the locking means for the carrier is released and
is absolutely safe for storage and handling pur
the plunger locks said control member in selected
poses and which is normally locked to maintain
the fuse in an inoperable or unarmed condition
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