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Патент USA US2404434

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5}’ 23, 1945-
.1. L CLARK gnu.
_
2,404,434
APPARATUS FOR PACKING EXPLOSIVEI IN CARTRIDGESv
Filed May 25,‘ 1942
3 Sheets-Sheet 1v
‘FIG. 2
FIG.
INVENTORS
BY~
Joseph L. Clark
Carly/e M Linden
C/oyd J Chg/'7‘ ‘
my‘. > (§.WTORNEY
Jug? 23, 194&
J. L. CLARK ETAL
29404334
APPARATUS FOR PACKING EXPLOSIVE IN CARTRIDGES
Filed May 25, 1942
3 Sheets-Sheet 2
F
69
'
E
'
E
'
55
57
INVENTQRS
Joseph L. Clark
-
Car/y/e M Linda/7
C/oyd J. Oberl'
' ea’ 1% ATéRNEY
July 23, 1946»
,
J. 1.. CLARK ETAL.
‘
2,404,434
APPARATUS FOR PACKING-EXPLOSIVE IN CARTRIDGES
Filed May 25, 1942
3_ Sheets-Sheet 3
INVENTORS '
BY
Joseph L. C/ark
Carly/e M L/hden
TTORJEY
Patented July 23, 1946
2,404,434
UNITED STATES PATENT OFFICE
2,404,434
APPARATUS FOR PACKING EXPLOSIVE
IN CARTRIDGES
Joseph L. Clark, Wilmington, Del., Carlyle M.
Linden, Chattanooga, Tenn., and Cloyd J.
Obert, Bessemer, Ala., assignors to Hercules
Powder Company, Wilmington, DeL, a corpora
tion of Delaware
Application May 25, 1942, Serial No.’ 444,456
3 Claims.
1
(Cl. 86-—29)
2
This invention relates to an apparatus for
the tamp rods after they have packed a couple“
packing explosive in cartridges and, more par
of strokes in the normal way, i. e. have ?rmly
ticularly, to the packing of cartridges with semi
packed ‘the bottom portion, to slip up and to
plastio explosive, so that the portion ?rst packed
then loosely pack the cartridge by merely pushing
is ?rm, the portion packed adjacent thereto is Cl explosive into the cartridge without tamping, as
soft and the portion last packed is firm.
the resistance of the explosive in the cartridge
Heretofore, attempts to pack a portion of a
builds up, the tamp rods keep slipping up until
cartridge ?rm and the remainder soft or to pack
the cartridge is full, thereby giving a cartridge
the entire cartridge soft have been unsatisfac
having a soft packed central portion; (2) to pro
tory, due to the fact that the end or ends of 10 vide a-safety feature whereby the bar is auto
the soft packed cartridges, mushroom, wrinkle
matically actuated between packing cycles to pre
vent any tamp rods from accidentally sticking
and/or collapse.
The principal object of this invention is to pro
down in such manner as to interfere with the ro
vide an apparatus for packing cartridges wherein
tation of the drum which carries the cartridges;
an intermediate portion of the cartridge is soft 15 (3) to provide a manually operated device which
packed.
enables the operator to dogup the entire set of
Another object of this invention is the provi
sion of mechanism for e?ectively, safely, and ex
peditiously packing cartridges with a soft central
portion.
tamping rods to the inoperative position when
ever accidents or other exigencies occur.
Another object of this invention is the provi
sion of automatic actuating mechanism for the
tamp rods, whereby the di?iculty of releasing ac
cidentally stuck rods is eliminated along with
the dangers inherent therewith.
25
Still another object of the present invention
resides in rendering the tamping rods immediately
inoperative whenever exigencies occur.
Other objects of the invention will appear
hereinafter, the novel features and combinations .30
being set forth in the appended claims.
‘
This invention resides in a new and useful
improvement comprising a triple-purpose dog
ging bar to be used in machines for packing ex
.
I
A preferred embodiment of the invention has
20 been chosen for purposes of illustration and de
scription and is shown in the accompanying
drawings forming a part \of the speci?cation
wherein like reference symbols refer to like parts
wherever they occur:
_
Fig. 1 is a part front elevationalview of the
cartridge packing machine with a part of the
revolving shell holder shown in section;
Fig. 2 is a'sectional view taken on line 2-2
of Fig. 1;
Fig. 3 is a part rear elevational view'of the
triple-purpose bar;
‘
.
Fig. 4 is an enlarged sectional View taken on
line 4-4 of Fig. 3;
I
_
Fig. 5 is a fragmentary plan view of the triple
plosive in cartridges and the particular embodi .35 purpose bar and appurtenant actuating mecha
ment of the invention is illustrated in conjunc
tion with a Hall cartridge-loading machine sim
Fig. 6 isa transverse sectional view of the tri
nrsm;
.
>
.
'
ilar to the machine disclosed in U. S. Patent No.
rile-purpose bar with an elevational view of a
601,138 to H. P. Hall. Certain improvements in
dogging element shown therewith.
'
the Hall machine have been made from time to 40
In Fig. l and Fig. 2,-A frames l are rigidly
time, and the illustrations depict a Hall machine
braced by tierods 3and as an integral structure
of recent origin, however, the fundamental prin
is supported by suitable sub-structure shown out
ciples disclosed in the above mentioned patent to
of function. Driving means (not shown) drive
Hall are still retained and are well known in the
gears 5 which engage gears ‘I which have one
art. The present invention is described in con 45 end of connecting rods 9 pivotally connected
junction with a modern Hall machine and is
thereto and the other end of the rods pivotally
clearly understood in reference to the above men
connected to a horizontal cross-head 'II. The
tioned patent.
_ cross-head II reciprocates with an up and down
Generally described, the present invention com
motion as imparted by the connecting rods 9 and
prises apparatus for packing a cartridge with 50 is in frictional engagement with a plurality of
semi-plastic explosive in such a manner that the
tamp-rods 13 thereby likewise reciprocating the
lower portion is ?rm, the central portion soft,
plurality of tamp-rods. The tamp-rods I 3 are
and the upper portion ?rm. This method of
preferably made in several sections and extend
packing is accomplished by a triple-purpose bar
from the top of the machine, usually in an upper
whose functions are: ( 1) to automatically cause
story down through the ?oor to a story below,
'
2,404,424
3
4
arily utilized to compensate for temperature vari
and the operating devices for the tamp-rods and
ation, thereby rendering it unnecessary to adjust
all the thumb screws 25 individually. Below the
cross-head ll there is a dogging device 29 whose
‘function is to look any one ‘of‘the tamp-rods I3
all metallic surfaces associated therewith are
kept in the upper story away from the lower
?oor where the loading of explosive is effected.
The lower sections ‘i3a'of the tamperods are pref~
erably "made of non-metallic and/or non-pyro
phoric material. The sections l3a are secured
as soon as it ?lls its respective shell and has
risen to a point where its action is no longer
needed. This function is accomplished by hav
at their upper ends into metal tubes i317, which
ing a plurality of dogging pins 38 slidably secured
extend through the floor. The metal tubes I310
are in turn secured to square metal sections (.30 i0 in .the dogging device 29, which are compressively
maintained in an operative position by springs
which extend to the top of the machine. Cross
3'3 respectively, and which operate when a swing
bars such as the cross-bar represented by l5 are
bar 35 actuates ?uid cylinders M" to move the
positioned throughout the length of the tamp
dogging device "29 ‘forward so that the dogging
rods l3 and serve to guide and space them. The
pins
3| engage apertured inserts 39 integral with
extreme lower end of section I30, of the tamp
the
tamp-rods
l3, thereby locking the latter in a
rods is tapered and is slightly larger in cross
?xed position. To disengage the dogging pins 3|
section at the lower extremity, so that air is per
from the inserts 39 push rods M are actuated by
mitted to escape when the tamp-rods descend
constant pressure ?uid cylinders 43 when the
into their respective shells and also to prevent
swing bar 35 is forward as a result of all of the
undue suction when the tamp-rods ascend from
pins having engaged ‘theirrespect'iveinserts, and
their respective shells. The lower ends of the
?uid cylinders 31 have been exhausted. "This
!-3 work through non-pyrophoric
‘ tamp-rods
moves the dogging device 29 backward ‘to its
"metalnipples H, which are a?ixed to the bottom
inoperative position and, accordingly, the dogging
of explosive hopper l9 and penetrate the shells
being loaded.
pins 3! assume their respe'ctive'inoperative .posi
The’shells are held in 'a rotatable
tions.
shell ‘holder 2|, provided with shell holding cav_
ities 2m, which rotates-about a horizontal axis
‘Each time thetamp-rods Hare raised ‘by fric
tional engagement with the ‘cross-:head "H, ‘they
and reciprocates vertically in cooperation with
do not all stand, necessarily, on :the same vilevel,
appurtenant mechanism (notshown) well "known
.in the art.
It is readily seen that the revolution ‘
of the shell holder 21 is to permit each series
"of shells to be successively ‘and concentrically
positioned beneath the tamp-rods 1'3, while the
vertical reciprocation of holder 2| is to ‘permit the
holder to -be ‘raised when the shells ‘are concen- . .
trio with the~tamp-rods, so that the empty ~shells
(not shown) in the'shell holder 2| engage the
nipples l‘! -thereby~eliminating any possibility of
“losing" explosive during the ?lling operation.
.After the shells have ‘been ?lled, the shell holder
2! is lowered and revolved, and the shells are
crimped,-closed and~ejected by means (not shown)
well known in the art, thereby augmenting a
continuous mode of operation as “empty shells
are continuously fed to the shell holder 21. In
connection with feeding the explosive to the hop
per l9, any suitable means, such *as'continuous
conveyors (not shown) may be employed. In
due to different quantities ‘of explosive ‘:having
been packed in the various shells. They are
brought to the same level, however, before start
ing on the initial downward3st'roke'byral‘cushioned
correcting bar '45 which limits *operative position
is disposed directlytalbove the ‘tamperods 1313.116.
against which the tamp-rods strike and areil'ev
ele'd just above the cros‘s-ihead ‘H to give ‘a, full
initial stroke. This causesiall of‘th'e independent
tamp-rods ‘to have an "equal ‘advance stroke
through the explosive at the initiation .of teach
?lling cycle. The correcting ‘bar ‘45 is moved to
its operative ‘position ‘by constant ‘pressure, ?uid
cylinders 41 ‘and v'is actuated "to its‘ inoperative
position when increased pressure :is supplied to
P45 ?uid cylinders 49. Cross-‘head 'balarncecylinders
‘5| under constant pressure have associated. mem
bers (not shown) cormected'totheorosséhead "H
and serve to balance the 'cross-headiagainst fric
tional and gravitational“ forces as ?it' reciprocates
connection with the shell ?lling operation suit
able safe ‘methods for agitating the explosive in "350 up and 'down 'in‘guides. Acheck‘bar?fii "located
near the top *of the A frames 1 :serves to :limit
the hopper must be provided toinsure uniformity
‘the travel of the 'tamp-rods upwardly :under ‘all
in packing the shells. Asuitable and vwell known
conditions.
‘
expedient for accomplishing this purpose is ‘the
W'hen the shells of the cartridgesrare ~packed
utilization of mechanical means (not shown)
within the explosive hopper 19, whereby friction -:55 with explosive, it will ‘be seen'th‘at if'all theetamp
rods are connected rigidly together, any ‘oneof
the shells is liable 'to be ‘?lled in advance "of ‘the
others, and‘if its tamp-rod continued toactgthe
.the tamp rods and means for locln‘nganyoneof
explosive would be compressed too hard in that
them stationary, as soon as its respective .shell
particular shell, while the others would be im
is ?lled, without stopping the action of theothers
perfectly ?lled; but when the tamp-rods are each’
will now be described with particular reference
independent in their action, whenever‘a tamp-T'cd
to Figs. 1 and 2. Each of the plurality of tamp
which has ?lled its shell in ‘advance of the‘others,
rods I3 is reciprocated vertically by cross-head
rises to a, given point, this tamp-rod is locked
II which has a plurality of friction clamp-‘plates
or gibs 23 held into engagement with the tamp 65 stationary 'while all the others continue to work
until they have ?lled their respective shells 'at
rods 13. These gibs '23 are individually regu
which time the same "action ‘takes place ‘with
lated by thumb screws '25 as to give any desired
them. When the shells are being packedw'ith
degree of frictional contact to its respective tamp
explosive by successive reciprocation of the tamp
rod vI3. This frictional connection of the tamp
rods with the cross-head causes the ‘latter to re 70 rods, every movement of each tamp-rod packs a
de?nite quantity of explosive into the shell and
ciprocate the tamp-rods, but still leaves them
each tamp-rod must, as the shell becomes ?lled,
slidably independent thereof, so that they may
rise; but when the cross-head comes down for the
slide when packing conditions so necessitate. A
next stroke, the tamp-rod is driven down just as
hand wheel 21 is also provided for general ad
justment of the cross-head II, which is custom 75 far as it had heretofore risen'from the growing
in the explosive is kept to a minimum.
The apparatus for independent operation of
5
2,404,434
bulk of explosive in the shell, therefore it will be
seen that when the tamp-rod has reached its ex
treme height from a perfectly ?lled shell, at this
time only do the tamp-rods come into registry
with the dogging pin and are securely locked.
Referring now more particularly to Figs. 3, 4,
6
explosive has been loosely packed for ‘approxi-‘
mately four inches the explosive builds up to a
point where the tamp-rods I3 are again packing
?rm, due to the fact the latching heels 55a are
no longer engaging the detents 59. These latter
two
inches are, therefore, ?rmly packedsimilar
5, and 6, the apparatus improvement comprising
to the initial'two inches and this ?rm packing in
the present invention will be set forth‘ and as
the end of the cartridge facilitates crimping the
generally described will be referred to as a triple
ends,
whereby such deleterious effects such as,
purpose bar. Apparatus for uniformly packing a 10
mushroomed ends, telescopic wrinkling, and col
shell with explosive to form a cartridge has been
lapsing of the cartridges are eliminated.v When
disclosed above, however, when it is desired to
the cartridges have been fully packed, the dog
pack a, shell having a?rm initial portion, a loose
ging pins 3| engage the inserts 39 of the tamp
central portion and a ?rm ?nal portion, a dog
rods
ging element 55 is affixed to each of the tamp 15 supra.I3 in the conventional manner, as explained,‘
.
rods I3. A triple-purpose bar 51 is slidably
A
safety
feature,
comprising
one
of
the
func
mounted between angle brackets 59, which are
tions of ‘the triple-purpose bar 51 is utilized inde
a?ixed to the A frames I, and the bar 51 engages
pendent of the other functions, that is, whether
the dogging elements 55 in a manner hereinafter
packing or not. Each time the shell'holder
described. The triple-purpose bar 51 comprises 20 soft
2| drops, ?uid pressure is exhausted from cylin-‘
a body member 6I having reinforcing members
ders 93 and 95 and cylinders 99 and 9| actuated
63 and 65 affixed to the top and bottom side,
by ?uid pressure, thereby move the bar '51'to
respectively, of the body member. Interposed
safety position'51" (Fig. 6) whereby the tamp
between the reinforcing member 63 and the body
rods are dogged" and cannot enter ‘their respective
member 6I is a cover plate 61. A plurality of
shells. As soon as the shell holder 2| has turned
spring urged detents 69 each having a compres
and has raised so that the shells engage nipples
sion spring H and each of which is adapted to
I1, the cylinders 85, 81 and 89, 9| are exhausted’
engage its respective dogging element 55, is slid
and the ?uid pressure previously exhausted is
ably secured to the body member 6 I by bolts 13,
again applied to ‘cylinders 93 and 95, and they
sleeves 15, nuts 11, pins 19 and plates 6| which 30 bar 51 returns to its inoperative position.
are al?xed to the body member by screws 83.
There are numerous factors which will in?u
Fluid cylinders 85 and 81, affixed to the frames I,
move the triple-purpose bar 51 forward to a posi
ence conditions for the most satisfactory opera
tion of the invention, the actual limits of which
tion, represented by 51' as limited by the piston
stroke of cylinders 85 and 81. Fluid cylinders 89 35 cannot be established except by detailed study of
each set of materials‘ and the intermediate and
and 9|, adjacent to cylinders 85 and 81 respec
?nished products involved, however, it is seen that
tively, move the triple-purpose bar further for
the functions of bar 51 are three-fold and adapt
ward to a position, represented by 51" as im
ed to provide means for automatically soft pack
parted by the piston stroke of cylinders 89 and
ing, automatically preventing any tamp-rods
9| and as limited by the piston stroke of cylin 40
from accidentally sticking down in such manner
ders 93 and 95, adjustably affixed to the frames
as to interfere with rotation of the shell holder,
I. With forward movement of the bar 51 to op
and manually dogging up the entire set of tamp
erative position 51', latching heels 55a on dog
ing rods to the inoperative position whenever
ging elements 55 are engaged. When the cyl
necessary due to accidents or other exigencies.
inders 85, 89, and 81, 9| are exhausted, the pis
It
is further seen that a method of soft packing
ton rods 91 and 99, respectively, engage seats I05
cartridges is provided wherein the cartridges are
and I91, respectively, which are a?ixed to the bar
so packed that crimping is accomplished without
51, and the bar is returned to its inoperative posi
deleterious distortion in the body of the cartridge.
tion by cylinders 93 and 95. When cylinders 93
It will ‘be seen, therefore, that this invention
and 95 are exhausted and cylinders 89 and 9| are
actually may be carried out by the use of various
?lled with motive ?uid, bar 51 moves to the oper
modi?cations and changes without departing
ative positon 51" and latching heel 5512 on dog
from its spirit and scope.
ging elements 55 are engaged. The top portion
What we claim and desire to protect by Letters
of dogging elements 55 is bevelled and the en
Patent is:
gaging end of detents 69 is beveled in a compat
1. In a machine for ?lling shells having a series
ible manner so that the latching heels 55a dur
of independent tamping rods and driving mech- .
ing the ascending stroke of the tamp-rods I3 push
anism frictionally engaging the tamping rods to
the slidable detents 69 backwards as the elements
reciprocate and permit them to independently
55 slip by, when the bar 51 is in position 51'.
retrogress as the shells become ?lled, the im
An example of the operation of the invention
provement which comprises a dogging element
is given for packing an eight inch cartridge,
a?ixed'to' each of the independent tampérods;
wherein it is desired to pack the initial two inches
a dogging bar having independent detents adapt
firm, the next four inches loose and the remain
ed to engage the independent dogging elements;
ing two inches ?rm. After the tamp-rods I 3 have
means for moving the dogging bar to a ?rst po-I .
executed a couple of strokes in the conventional
sition to engage the dogging elements and restrict
manner, whereby the explosive is ?rmly packed in
downward travel of the tamp-rods into their re
the bottom two inches of the shell, cylinders 85
spective shells; and means for moving the dog
and 81 actuated by ?uid pressure move the triple
purpose bar 51 to position 51' (Fig. 6). In this
ging bar to a second position to engage the dog
position the latching heels 55a on the descending
ging elements and prevent the tamp-rods from
stroke engage the detents 69 of the bar 51 and
on the ascending stroke slip by the detents as ex
plained, supra. With the bar 51 in this position,
the tamp-rods I3 merely push explosive loosely
into the shell without packing it ?rm. When the
entering their respective shells.
2. In a machine for packing cartridges with
explosive having a series of independent tamping
rods and driving mechanism frictionally engag
ing the tamping rods to reciprocate and permit
them to independently retrogress as the car
"
2,404,434
7
tridges become ?lled, the improvement which
comprises a dogging element a?ixed to each of
the independent tamp-rods, said dogging element
having an upper step and a lower step, the upper
step having a beveled top portion adjacent there
to; a dogging bar having independent spring
urged detents adapted to engage the dogging ele
ments, each detent having a beveled portion op
8
which is ai?xed to a respective tamp-rod of a
series of independent tamp-rods, each of said
dogging elements having an upper step and a
lower step, the upper step having a beveled top
portion adjacent thereto; a dogging bar having
independent spring urged detents adapted to en
gage the dogging elements, each detent having a
beveled portion operatively contiguous with the
beveled top portion of a respective dogging ele
eratively contiguous with the beveled top portion
ment, to permit the dogging element to slip by
10
of a respective dogging element, to permit the
the detent when its respective tamp-rod ascends;
dogging element to slip by the detent when its
means for moving the dogging bar to a ?rst po
respective tamp-rcd ascends; means for moving
sition wherein the detents engage the upper step
the dogging bar to a ?rst position wherein the
of their respective dogging element's, thereby re
detents engage the upper step of their respective
straining the descent of the tamp rods into their
dogging elements, thereby restraining the descent
respective shells; means for moving the dogging
of the tamp-rods into their respective cartridges;
bar to a second position wherein the detents en
and means for moving the dogging bar to a sec
gage the lower step of their respective dogging
ond position wherein the detents engage the
elements, thereby preventing the tamp-rods from
lower ‘step of their respective dogging elements, 20 entering their respective shells.
thereby preventing the tamp-rods from entering
their respective cartridges.
JOSEPH L. CLARK.
3. In combination with a machine for ?lling
CARLYLE M. LINDEN.
shells a dogging mechanism which comprises a
CLOYD J. OBERT.
series of independent clogging elements each of
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