Improvements in Automatic Fuses for Projectiles.
Year: 1895

page_text: Date of Application. 8th June, 1895-Accepted, 21st Sept.,. 1895
AUM LEIE OF BUITIATION.
Improvements in Automatic Fuses for Projectiles.
I, JOHN RAPIEFF, of 41 Wall Street, in the City, County and State of New
York, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:―
The present invention particularly relates to a fuse for explosive shells, that is to
say, to a fuse carried by the shell that is adapted at the proper time to fire the
bursting charge also carried by the shell, and it consists in the novel features
hereafter described.
The accompanying drawings illustrate a practical embodiment of the invention,
in which :-
Fig. 1 is a longitudinal sectional elevation of the forward end of a projectile
with the improved fuse and case shown in position within the head of the shell and
in normal position.
Figs. 2 and 3 are similar views of the main portion of the fuse with some of its
contiguous parts and shown in changed positions.
Fig. 4 is a cross sectional elevation on the irregular line IV-IV, of Fig. 1,
showing the ends of the hammers in elevation, the hammer locking pins being
absent.
Fig. 5 is a cross section on the line V-V, of Fig. 1, and Fig. 54 is a like section
on the line Va of Fig. 1.
Figs. 6 to 24 inclusive are sectional views of modified structures hereinafter fully
set forth.
The fuse A is shown as a head fuse located within the head of a projectile B
and is arranged to be inserted bodily in place therein, ready for firing. The fuse
in the main consists of a cylindrical body 50, screw-threaded, to which is an
annular extension 50 having a head flange 51 arranged when the fuse is in place
in the projectile to seat against the end 52 of the inner head B' of the projectile,
and to be held firmly in place by a screw-threaded cup-shaped cap 53" which closes
the front end of the projectile. The position of the fuse is assured with respect
to the inner head B¹ by a guide pin 51 that enters a slot in the end 52.
The interior of the body 50 provides a hammer chamber 40 and the extension 50"
a retainer chainber 40 communicating with the hammer chamber, the chamber 40°
being closed by a screw cap 44 which has a handle 45 by which the fuse as a whole
may be handled before and while being placed within the projectile. The rear of
the body has a chamber 46 with which communicate a number of longitudinal
channels intended to contain a quick or time train or charge of gun powder. The
front of some of the channels 3, two as here constructed, which preferably contain
a time train, communicate with flash passages 2 of nipples 1 arranged to support
a cap which is exposed to the hammer chamber 40. The other channels 3 com-
municate in front with a plurality of flash passages 4 between which and a firing
pin ò projecting outwardly and exposed to the exterior of the extension 0" is also
arranged a cap to be exploded when the pin is struck; the rear end of the body 50
is screw-threaded to a ring 47 which in turn through a ring 48 is connected to the
front end of a case 49 containing a priming charge of dry gun cotton or other
suitable explosive.. The ring 47 also carries a gland 30 between the flange of which
and the rear end of the body 50 is confined the flange end of a central case 31,
containing preferably a charge of gun powder or other explosive which projects

page_text: within the chamber 46. Between the rear end of the case 31 and the flanged
ring 30 there is supported a plate 32 having a central hole at its front with the
interior of the case 31 and at its rear with a small cylindrical case 33 containing
fulminate of mercury. The plate 32 is directly confined between discs or washers
of lead 34 or other substance insensitive to the vibrations of the metallic portion
of the fuse and of the projectile for the purpose of deadening the vibrations, thus
preventing the premature explosion of the fulminate of mercury.
Immediately in front of the ring 47 the body 50 supports a recessed sleeve 53
held to the body by a shearing screw or pin 54. In the recess of the sleeve 53 and
surrounding the body 50 is arranged a coiled spring 55, the front of which presses
against the shoulder 57 of a releasing or protecting shield or sleeve 56 which
overlies the sleeve 53 and also at its front end the extension 50, the rear end of
which extension forms a front stop limiting the forward movement of the sleeve 56
when it is projected forward by the spring 55. The releasing sleeve 56 is normally
connected to the body 50 through the sleeve 53 by a divided or two part bolt 58,
the inner portion of which bolt projects into a rearwardly inclined recess 59 in the
body 50. The forward portion of the releasing or protecting sleeve 56 has a
plurality of holes 60 arranged when the sleeve is projected forward to align with
and expose the firing pins 5 as in Fig. 2, and with a set of holes 61 for coincidence
at the same time with holes 62 in the extension 50º.
In the hammer chamber 40 is arranged a pair of spring pressed hammers 41
mounted together on a pivot 6 and having heels 7 borne upon by slidable blocks 42
seated in recesses in the body 50 against springs 43. The two ends of the hammers
when rocked on their pivot are arranged to strike caps on the nipples 1, as in
Fig. 3, but normally are arranged to lie adjacent one another and be confined
against the rocking force of their springs 43 by entering a recess 35 in the rear of
a weighted retainer, tripper or trigger 36, as in Figs. 1 and 2, and to be also confined
and guarded from being accidentally released by a pair of removable pins 8, which
are removed just previous to the fuse being placed within the projectile. The
sleeve 56 is prevented from turning on the body 50 by a guide screw 63, the end of
which enters a longitudinal slot in said body.
The weighted retainer, tripper or trigger 36 is held seated within the
chamber 40 against the front end of the body 50, closing the chamber 40, by a
spring 37, interposed between the cap 44 and the retainer. The retainer is normally
locked in place by one or more balls 38 which are seated in the holes 62 of the
extension and project a sufficient distance into the chamber 40° to prevent the
forward movement of the retainer; the balls being held in place and from accidental
displacement by the solid portion of the sleeve 56, but adapted to drop outward
from the holes in the extension 50° when the holes 61 in the sleeve 56 coincide
with said holes 62.
The inner sleeved head B₁ of the projectile support a plurality of radial
hammers 64 equal in number to the firing pins 5 and in position to strike said pins,
when the protecting sleeve 56, a solid portion of which is normally interposed
between the hammers and the pins as in Fig. 1, is moved to bring its holes 60 in
line with the pins to expose them to the hammers. As shown in Fig. 1 each radial
hammer 64 has its head held just behind and in contact with the exterior wall of
the projectile head and is seated upon a spring 65 yieldingly holding the hammer
outwardly against said wall and against the force of which spring the hammer is
moved inwardly to strike the pin should the projectile hit the target on its side
instead of head on. A stop pin 66 is employed to hold the hammers in place
during assemblage.
In operation at the moment of the propulsion of the projectile along the gun
barrel, the stock of the set back of the sleeves 53, 56, and the spring 55 contained
between them, is sufficiently great to move them rearwards and to shear the screw
pin 54 thereby disconnecting said sleeve from the body 50 and bringing both
rearwardly against a buffer 67 provided on the ring 47. This rearward movement
of the two sleeves causes the incline of the recess 59 to force the two part locking

page_text: bolt 58 outwardly so that the two sleeves are no longer held together whereupon
the spring 55 after the acceleration of the projectile ceases, moves the protecting
sleeve 56 forward into the position shown in Fig. 2, at the same time holding the
recessed sleeve 53 in its rearmost position against the buffer 67. In the forward
movement of the protecting sleeve its forward end enters an annular pocket 68
formed in the extension 50 and fitting said pocket snugly cushions against a small
body of air trapped therein, which may be regulated in any proper manner; and
the sleeve may be locked in this position by a spring pressed bolt 88 supported by
the fuse body in position to interlock with a recess 89 in the sleeve. In the forward
position of the sleeve 56, the holes 60 have been brought in line with the firing
pins 5, so that the radial hammers are free to act to strike one or more of such
pins, and the holes 61 have been brought in line with the holes 62 so that the
balls 38 may leave their places and thus no longer act to lock the retainer 36
against movement. Such is the condition of the fuse during the flight of the
projectile. At the moment the projectile strikes the target the retainer 36 due to
its inertia and the consequent retardation of the projectile jars off its seat or moves
forward against the pressure of the spring 37 and thus releases its hold of the ends
of the hammers 41 which thereupon are forcibly rocked outwardly in opposite
directions under the force of their springs 43 to strike the caps on the nipples or
anvils 1 as in Fig. 3, whereby the train in the channels 3 is fired.
The fire from the time-train in the channels 3 ignites the flocculent gun cotton
in the chamber 46 and this in turn ignites the gunpowder in the central case 31
which in turn explodes the fulminate in the case 33 and the latter detonates the
dry gun cotton in the case 49 which in turn detonates the main charge of explosive
carried by the body of the projectile, as is usual.
In practice the vent a from the flash channel 2 and the ends of the time train
channels entering into the chamber 46 will be plugged or covered with some
suitable paper or cloth washer b which will be waterproof and cemented down in
place; and likewise there will be a similar washer c covering the perforation
leading to the fulminate case 33 so as to divide or separate the different charges of
explosive from each other, and confine them in place.
So, too, the slidable blocks 42 bearing against the heels of the hammers 41 will
be held by the springs 43 off from the shoulders e so that in the set back at the
moment the projectile is propelled through the gun, the shoulders will stop the
rearward motion of the blocks 42 and relieve the springs of the shock incident to
the set-back and thus avoid their breaking.
The walls of the fuse body surrounding or adjacent the rear chamber 46 is made
thinner, as at x, than at other portions; and the powder case 31 supports a cap
anvil 31 protected by a fragile cap 31 immediately behind and not touching a
solid portion of the fuse body, so that should the projectile and fuse body be
crushed by the impact with the target the collapse of the body will first be had at
the weak portions x and the cap on the anvil 31° be exploded to fire the powder in
the case 31, and detonate the fulminate in the case 33.
In the modification shown in Fig. 6, the weighted retainer 36 is confined to its
seat by a spring seated bolt 70 which is normally held in place by the overlying
solid portion of the protecting sleeve 56, but when the sleeve moves forward into
the position shown in Fig. 2, the bolt is free to drop outwardly under pressure of
the spring through the hole 61, and thus release the retainer 36. In addition to the
freeing of the hammers 41ª the weighted retainer 36 after being released by the
bolt 70 acts itself as a hammer to strike a forward firing pin 10 to explode a cap
on the anvil 11 to ignite through the flash channels 12 the time composition in the
longitudinal channels 3. The anvil 11 and flash channels 12 are provided in a
central head block 13 forming the end of the chamber 40%, the spring 37 being
interposed between said head and the retainer 36. The head 13 also supports another
anvil 14 projecting forwardly and supporting a cap adapted to be struck at the
proper time by a rearwardly moving hammer sleeve 15. This hammer sleeve is
connected at its front end to an inwardly movable exterior head 16 forming the

page_text: head of the projectile and normally held in place against movement by a shearing
pin 17.
This head 16 is arranged to be moved as iudicated by dotted lines when
striking a water target or other object which may be struck head on by the pro-
jectile, the movement of the head being opposed by a suitable spring 18 interposed
between said movable head and an annular cup-shaped seat formed at the inner
end of an inwardly projecting sleeve 19 carried by the cap of the projectile 53.
Normally the hammer 15 of the movable head 16 is locked against movement by
a bolt 20 spring pressed outwardly, which bolt in turn is held in locking position
by the eccentrically shaped head on the longitudinally moving pin 21, see also
Fig. 7, which pin is held in place by a shear pin 22 and its end is arranged to be
struck by the end of the protecting sleeve 56 when said sleeve moves forward to
its foremost position, shown in Fig. 2, in the manner before described. The sleeve
thus strikes the pin 21, shears its shearing pin 22, and moves the eccentric head
from contact with the bolt 20 and allows said bolt to spring outwardly having
released the hammer sleeve 15 so that such sleeve may operate to explode the cap
on the anvil 14 should the movable head 16 be moved inwardly when the projectile
strikes the target. The operation of the hammers 41 is similar to that of the
hammers 41 before described. They differ somewhat in construction in that they
are mounted on separate pivots 6ª.
The
In the modification shown in Fig. 8, a tubular form of hammer 36ª is arranged
to move forward at the proper time under the pressure of the spring 36b to strike
one or the other or all of a number of firing pins 10ª to ignite caps on the anvils 11ª
to ignite the time composition in the channel or channels 3, as before.
hammer 36ª is locked in place by a pair of two-part bolts 36 which are confined
against accidental displacement by the overlying solid portion of the protecting
sleeve 56, which bolts, or the outward parts of them are arranged to be freed by
the alignment of the hole or holes 36d in the sleeve 56 when the sleeve has moved
to its most foremost position. The inwardly movable head 16 in this case instead
of moving a hammer sleeve, as in Fig. 6, is connected to and moves a taper-ended
bolt 15, the taper of which is arranged when the head 16 is moved inward to bear
against the inner ends of the two-part bolts 36° and move them outwardly, and thus
free the hammer 36ª and permit it to be projected forward by the spring 36 to
strike one or all of the firing pins 10.
"
In the modification shown in Fig. 9, the taper-ended bolt 15b is locked in place
by one or more locking bolts 20ª which are released by the alignment of a hole 20°
in the protecting sleeve 56. The hammer 36 in this case is arranged to move
rearwardly against caps on anvils 11b, said hammer being protected by a spring 36
mounted between the hammer and a flange on the taper-ended bolt 15. The
hammer is held in place by shearing pins 36 and as before is locked in place by a
pair of divided locking bolts 36° which are arranged to be displaced to release the
hammer by the inward movement of the taper end of the bolt as before. The
spring 36' being strong enough to shear the pins 36' to entirely free the hammer.
In the modification shown in Figs. 10 to 13, inclusive, different means are shown
for locking and releasing the weighted retainer 36, and thereby releasing the
hammer 41. The retainer is held in its seat against the end of the body 50 in
Fig. 10, by the abutting end of a front sleeve 71 that is mounted to slide in a central
opening in the forward extension 50° of the body portion of the fuse, said sleeve
being locked in place by a two-part locking bolt 72 against the pressure of a confined
spring 73.
Within the sleeve is mounted a rod 74 with a flared head, the rod
being connected to the sleeve by a shear pin 75 which on the set-back at the
moment of propulsion of the projectile in the gun is sheared so that the rod may
move rearwardly moving by the incline or flare of its head the two-part locking
bolt 72 from place and thereby releasing the sleeve 71 and permitting the spring 73
to move the sleeve forward and release its end from contact with the retainer 36,
thereby freeing the retainer so that at the moment of impact with the target such
retainer will move forward against the force of the spring 37 to release the
hammers 41, which are of the construction previously described.

page_text: In Fig. 11 the weighted retainer 36 is locked in place by the end of a bolt 74°
that is mounted within a sleeve 76 carried by the head of the extension 50° of the
fuse. The bolt is locked in place against the pressure of a confined spring 73 by
a two part bolt 72ª which bolt is arranged to release the bolt 74" at the set-back
by the movement of the sleeve 77 whose inclined or flared inner surface bears
against the two part locking bolt and moves it inwardly, the inner part into a
recess in the bolt 74. The sleeve 77 is held in place against premature movement
by a shearing pin 75º.
In the construction shown in Fig. 12, the central bolt 74° is mounted rigid with
the head of the body 50 of the fuse, over which bolt is a sleeve 71ª with its inner
end holding the retainer 36 securely in place through a plurality of interposed
balls 71. Said sleeve is held rigid with the central bolt by the two part bolt 72³,
the outer end of which bears against the inner surface of another sleeve 77 the
inclined or flared surface of which on the set-back moves the two part bolt inwardly
and releases the sleeve 71* from the bolt 74b so that the confined spring 73 is free
to move the sleeve 71ª forward to remove its inner end from holding the balls 71"
and thus release the retainer 36 so that the latter is free to move forward at the
moment of impact of the projectile with the target. The sleeve 77 is held in place
as before by a shearing pin 75.
>
"
Instead of the central bolt 74ª of Fig. 11 holding the retainer 76 by direct
contact, the balls 71b, as in Fig. 13, may be interposed between the bolt and the
retainer, the operation being the same as that described in connection with Fig. 11.
In the modification shown in Figs. 14, 15 and 16, the hammers 41 are simple
spring blades supported at their inner ends by a block 80 in a removable head 81
held in a seat at the rear of the body 50, the block being held in place by a screw-
threaded sleeve 82. The ends of the spring bladed hammers are headed and
confined by the retainer 36 as before; the retainer being held in place by a central
bolt 74. This bolt is mounted in a central perforation in the front cap piece 44ª
secured to the body portion of the fuse and is secured in position by a two-part
bolt 72° that is arranged to be moved to release the bolt 74° by a longitudinal
bolt 21 mounted in the body 50 in position to be struck and moved forward by the
protecting sleeve 56 as the latter moves to its foremost position in the manner
before described. The longitudinal bolt 21 is held against premature movement
by a shearing pin 21 and its forward end is inclined to engage and move the
two-part bolt 72° inwardly, such movement being had against a spring 72° mounted
in the head of the central bolt 74°. In the forward movement of the sleeve 56 its
end meets the bolt 21ª and moves it forward as shown in Fig. 15 releasing the two
part bolt 72 and allowing the central bolt 74° to move forward under the pressure
of the confined spring 73 thus releasing the retainer 36. Upon the retardation of
the projectile on striking the target the retainer 36 moves forward as in Fig. 16,
releasing the hammers 41° and allowing them to strike the caps on the anvils 1
through the interposed firing pins 1 in a manner similar to that before described.
In the construction shown in Figs. 17 and 18, each of the hammers 41° are
pivoted on an independent pin 6° with its heel having a small roll bearing upon a
block 42 spring pressed by a spring 43 as in the structure shown in Fig. 1. Each .
hammer is held from premature movement and is borne upon in front of its pivot
by a rod 83, the head of which is spring pressed outwardly, but is confined in place
in the normal position of the parts by the overlying solid portion of the protecting
sleeve 56 and adapted to release the rods when said sleeve due to the set-back:
before described is in its foremost position by the alignment of a hole 84 in the
sleeve with each rod 83. Between the hammers extends a trigger in the form of a
conical headed rod 36" forming the tail piece of a weighted sphere or other shaped
piece 36 that is seated against the front end of a centrally perforated cap piece 85
interposed between the hammer chamber 40 and the front chamber 40 which is
closed by the cap 44 and in which front chamber the weighted piece 36" moves
upon the retardation of the projectile.
In normal position, the hammers 41° are locked against movement, also confining

page_text: the trigger weighted piece 36" against movement by the action of the protecting
sleeve 56 through the rods 83 before referred to, the line of contact of the rolls on
the rear ends of the hammers with the spring pressed blocks 42 being such that
the tendency of the blocks upon the hammers is to force their front heads inwardly.
Upon the set-back, the rods 83 are released and fall from place, and at the moment
of retardation or impact of the projectile with the target the weighted piece 36™
moves forward by its momentum so that its conical, inclined or wedge-shaped tail
piece rocks the hammer heads outwardly changing the position of the point of
contact of the hammer rolls with the blocks 42ª as in Fig. 18, each of which are
thereupon free to operate to force each hammer under spring pressure against a
firing pin 1 to explode the cap upon the anvil with results similar to those
previously described.
In Figs. 19 and 20 other forms of hammers 41, 41° are shown adapted to the
structures herein described. In Fig. 19 the pair of hammers are acted upon by a
single helical spring 43d confined between them just in front of their pivots 6d the
hammers being retained in position ready to strike by the weighted retainer 36
indicated by dotted lines.
In Fig. 20 the pair of hammers 41° mounted upon pivots 6° are acted upon by
spring blades 43, the hammers being held in position to strike the caps by the
retainer 36 as before. It should be remarked that the freedom with which the
retainer 36 shall release the ends of the hammers may be governed by the shape of
the recess 6' in which the hammer beads project in the retainer. Thus if the
recess be undercut as indicated the freeing of the hammers will be less delicate,
and if such recess be formed the reverse of undercut the holding action of the
retainer will be exceedingly delicate, and thus any degree of sensitiveness to
movement may be provided for.
In Fig. 21 the weighted retainer 36 is held in place by an inclined rod 38ª which
in turn is confined by the protecting sleeve 56 and released when the sleeve is in
its foremost position by the coincidence of a hole 61" in the sleeve with said rod 38*.
The retainer in this structure holds in striking position a ball-shaped hammer 41'
through the interposition of another ball m which is located in an opening in the
wall of the body 50 separating the retainer chamber 40° from the hammer
chamber 40'. When the retainer 36 moves forward at the moment of impact of
the projectile with the target against the pressure of its spring 37 the ball mis
released by the retainer and is forced into the chamber 40° by the pressure of the
spring 43 which is then free to suddenly project the hammer 41' forward against
the firing pin 1ª to explode the cap as before with like effect.
In the modified structure shown in Figs. 22 to 24 inclusive, the tubular or sleeve
shaped hammer 41' is mounted in a central chamber of the fuse body 50 with its
rear wall seated against a confined spring 43' and held in such position compressing
said spring by a pivoted detent 86, that is arranged to be tripped at the proper
time by the rocking of a trigger lever 87, one end of which lever is in position to
be struck the forward blow of a trip or ball 88 seated in the tubular portion of the
hammer 41. The detent 86 is locked in holding position by a bolt 38 that is
confined by the solid portion of the protecting sleeve 56 which bolt is freed by the
coincidence of a hole 61' in the sleeve when the sleeve is in its foremost position as
before described. The ball 88 is yieldingly confined in place by the bent down
ends of a spring blade 89 carried by the hammer 41', and is also locked in place
and released by the protecting sleeve in a manner similar to that of the bolt 38.
At the set-back on the propulsion of the projectile through the gun the protecting
sleeve 56 releases the bolts 38 and 90 and places the parts in condition for action.
On the impact of the projectile with the target the hammer 41' still being held by
the detent 86, the trip or ball 88 due to its momentum forces the ends of the spring
blade 89 aside and suddenly strikes the lever or levers 87 which in turn rocks the
detent 86 freeing the hammer 41' which thereupon is forced forward by the
spring 43' to strike the firing pin or pins 1ª as before and with like effect.
It may be stated that while the fuse fully charged and set ready for insertion in

page_text: place in the projectile is being handled and transported it is preferred to lock the
parts against accidental movement as by a pair of pins 8 locking the hammers 41,.
and by a thumb-screw 91 locking the sleeve 56 securely to the fuse body as in
Fig. 5, and locking the bolts and sleeve of the structure shown in Figs. 10 to 12,-
as indicated by dotted lines, which pins 8 and screw 91 will be removed just
previous to placing the fuse in position in the projectile.
It will be understood that while I have illustrated the several novel features as
combined in a single fuse, that part thereof may be used independent of others,
and in other kinds of fuses.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what I
claim is :-
1. In an automatic fuse, the combination with the cap anvil and the hammer, of
a trip or trigger normally holding the hammer against movement and adapted to.
move at the instant of impact to release the hammer, as set forth.
2. In an automatic fuse, the combination with the cap-anvil and the hammer, of
a trip or trigger normally holding the hammer against movement, a lock for the
trip and means for releasing the lock on the propulsion of the projectile, as set.
forth.
3. In an automatic fuse, the combination with the cap-anvil and the hammer, of
a trip or trigger normally holding the hammer against movement, a lock for the
trip, and a sleeve to release the lock, as set forth.
4. In an automatic fuse the combination with the cap anvil and the hammer, of
a weighted trigger normally holding the hammer in position to strike, a releasable
lock normally locking the weighted trigger against movement and means for
releasing the lock, as set forth.
5. The combination with a pair of hammers, of a single trigger holding the-
hammers in striking position and free to move by momentum at the moment of
impact with the target, as set forth.
6. The combination with a pair of hammers, of a single trigger holding the
hammers in striking position and free to move by momentum at the moment of
impact with the target, and a releasable lock for the trigger released by the set
back at the moment of propulsion, as set forth.
7. The combination with a fuse having a plurality of exteriorly projecting firing
pins, of a plurality of hammers adapted to strike said pins, and a longitudinally
movable shield or sleeve to expose said pins to the hammers, as set forth.
8. The combination with the fuse body supporting a number of exteriorly
projecting firing pins, of a number of radially mounted hammers for said pins,.
and a protecting sleeve surrounding the fuse body and normally covering the firing
pins and adapted to move at the set back to expose the pins, as set forth.
9. The combination with the fuse body supporting a number of exteriorly
projecting firing pins, of a number of radially mounted hammers for said pins, a
protecting sleeve surrounding the fuse body and normally covering the pins, and a
spring for moving the sleeve forward to uncover said pins, as set forth.
10. The combination with the fuse body, supporting a cap anvil and a hammer
for exploding the cap, of a longitudinally movable shield or sleeve and means for
releasing the hammer upon the movement of the sleeve, as set forth.
11. The combination with a pair of spring pressed hammers and their respective.
cap-anvils, of a weighted trigger holding the hammers in position to strike and a
spring for the trigger compressible on the movement of the trigger due to its
momentum, as set forth.
12. The combination with the fuse body, its cap anvil and hammer, of a spring
pressed longitudinally movable protecting sleeve, another sleeve, a two-part locking
bolt locking the sleeves together, and means for releasing the bolt to permit the
protecting sleeve to move forward, as set forth.
13. The combination with the fuse body, its cap-anvil and hammer, of a spring

page_text: pressed longitudinally movable sleeve, a locking bolt normally locking the sleeve
against movement, means for releasing said bolt, and another bolt for locking the
sleeve in position after movement, as set forth.
14. The combination with the fuse body, its cap-anvil and hammer, of a spring
pressed longitudinally movable sleeve surrounding said body, a lock for normally
holding the sleeve against movement, means for releasing the lock at the set back,
and an annular front recess on the fuse body forming a front air cushion seat for
the sleeve, as set forth.
15. The combination with the fuse body, its cap-anvil and hammer, and having
a rear chamber in communication with the flash channel of the anvil, of a central
powder case projecting into said chamber, as set forth.
16. The combination with the fuse body, its cap-anvil and hammer and having a
rear chamber in communication with the flash channel of the anvil, a cap-anvil
projecting into said rear chamber toward a solid portion of the fuse body, and a.
collapsible wall to said chamber to permit the cap on said anvil to be exploded by
impact with the solid portion of the body, as set forth.
17. The combination with the fuse body having a collapsible wall, of a cap anvil
supported against said collapsible wall and an opposed striking portion of the fuse
body, as set forth.
18. The combination of the chambered fuse body, its. cap-anvil and hammer,
and a front cap closing the end of the body and having a handle for bodily handling
the fuse, as set forth.
19. The combination of the fuse body, its cap-anvil and hammer, a rear fulminate
case carried by the body, and portions of material insensitive to the vibrations of
the metal portions of the fuse interposed between said case and the fuse body, as
set forth.
20. The combination of the fuse-body, its cap-anvil and hammer, a rear powder
case and fulminate case, and a gland holding both in place to the fuse body, as set
forth.
Dated this 8th day of June 1895.