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Патент USA US2128839

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Aug. 3o, 193s. DEVICE
N. E. METHLIN
2,128,839
FOR OPERATING LAND MINES AND THE LIKE
BY THE PASSAGE OF TANKS OR OTHER VEHICLES
Filed NOV. 24, 1936
2 Sheets-Sheet l
Aug. 30, 1938.
N, E. METHLIN
2,128,839
DEVICE FOR OPERATING LAND MINES AND THE LIKE
BY THE PASSAGE OF TANKS OR OTHER VEHICLES
Filed Nov. 24, 1936
.
v 2 Sheets--Shee'fI 2
Eig. 3.
22
23
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s .5,
2.5%,
Patented Aug. 3o, 1938
2,128,839
UNITED STATES PATENT OFFICE
2,128,839
DEVICE FOR OPERATING LAND MINES AND
THE LIKE BY THE PASSAGE 0F TANKS OB,
OTHER VEHICLES
Nicolas Emilien Methlin, Paris, France, assigner
to Schneider & Cle, Paris, France, a joint-stock
company of France
Application'Novenìber 24, 1936, serial No. 112,600
In France January 21, 1936
8 Claims. (Cl. 102-2)
'I‘he present invention relates to devices for the
protection of the ground of military operations,
particularly against tanks or other like vehicles,
and which comprise in the known manner, a cer
tain number of mines or other like appliances
suitably distributed or dispersed over the ground,
and the firing mechanisms of which are associ
ated with control members intended to bring
about the operation of the said explosive ap
pliances at the moment the tanks or other like
vehicles pass over the said members.
The present invention relates more particu
larly to the special members for controlling the
ñring of such appliances, the said members be
ing substantially constituted, for each appliance
or for a couple of appliances, by a sheathed cable
forming a iiexible unit which is disposed on or
lightly buried on the ground and the sheath of
20 which is constructed so as to be capable of elon
gation under the effect of a deformation` the con
nection between the cable and the movable mem
ber of the tiring mechanism being such that mere
deformation -of the sheathed cable, at the moment
of the passage of a load of predetermined magni
25
tude. produces an elongation of the sheath, re
sulting in a pull being exerted on the cable, which
ñnally brings about the operation of the mecha
nism or mechanisms to which the latter is con
nected.
soV
The accompanying drawings show by way of
example various embodiments of the invention.
Figure 1 is a longitudinal section oi’ a first
form of construction of the sheathed cabled sys
tem according to the invention. Figure 2 shows
the same device deformed under the eil’ect of the
passage of a vehicle and hence producing a pull,
causing the explosion of a corresponding ap
pliance. Figure 3 shows in longitudinal section
a modiiication of the sheathed cable system of
40 the present invention together with one form
oi’ iiring mechanism to which the system may be
connected. Figure 4 is a diagrammatic view illus
trating the action of a wheel or endless track of a
tank in passing over ground protected by explo
45
sive devices embodying the present invention.'
Figure 5 is a view. partially in longitudinal sec
13 and 14 are longitudinal sectional views of vari
ous modiiications of the sheathed cable by means
of which the iiring mechanisms of explosive de
vices may be operated in accordance with the
present invention.
In the example of Figures 1 and 2, the sheath
is constituted by a certain number of sleeves I
threaded on the flexible but non-extensible .cable
2, the end 3 of which is secured to a shoulder 4
forming a stop for the corresponding end sleeve 10
of the sheath. Under the effect of the deforma
tiony of the system. during the passage of a ve
hicle of a sufllcient predetermined load, the mem
bers assume a position such as that indicated in
Figure 2, the deformation of the sheath produc
ing an elongation due to the separation of its ele
ments, the said elongation causing the end of
the cable connected to the movable element of the
iiring mechanism to move from 5 to 5'.As illustrative of the manner in which the zo
sheathed cable system of Figures 1 and 2 may be
operatively connected to the ñring mechanism of ’
an explosive appliance, reference may be had to
Figure 3. As shown therein the iiring mecha
nism is constructed in the form of a fuse screwed
to the appliance and comprises a fuse body in
two parts 6 and 'I connected by screwing together.
8 is a iixed percussion cap. 9 is the movable
striker, ñtting by means of a sleeve I 0 in a striker
support Il, Ato which it is fixed by means of a 30
pin I2. The striker 9 also comprises a flange I3
_bearing against a shoulder Il on the element 'I of
'the fuse body.
Compressed between the edge of the rear tubu
lar part of the striker 9 and the closed end of 85
the tubular striker support II is a spring I5
which, by expanding when the pin I2 is broken
under the eiïect of the pull exerted on the cable
2, drives the striker 9 violently against the per
cussion cap 8.
'
The end 5 of the cable 2 is ñxed to the striker
support I I, for example, by means of an expanded
part 5a.
'I‘he end I’ of the sheath I is supported in the
base of a recess I6 in the element 1 of the fuse 45
body. If, due to a deformation of the sheath I,
tion, illustrating the application of the invention
the pull exerted on the cable 2 is‘suilicient to rup
to a pair of explosive devices. Figure 6 is a view, ture the pin I2, the striker supported on the fuse
also partially in longitudinal section, illustrating 1 body is separated from the striker support and
one mode of connecting a common operating
is driven by the _spring I 5 towards the percussion
cable to a plurality of explosive -devices. Figures
7, 8, 9 and 10 are diagrammatic illustrations of
a number of different arrangements which may
55
be adapted for protecting a piece of ground by
means of the present invention. Figures 11, 12,
cap.
,
Figure 4 shows diagrammatically the action of
a wheel or endless ,track I'I of a tank by its pas
sage over the cable-sheath system connected to
the firing mechanism of the mine I8.
2
2,128,839
Figure 5 shows the application -of the invention
to a couple of mines or like appliances, at which
the ends of one and the same sheathed cable
taining pin) results in the operation of the ñr
terminate.
As shown in Figure 6, it is possible to make
ing mechanism. Of course, various other forms
of construction could likewise be produced in
a plurality of appliances dependent upon a com
which the deformation would produce, on the
mon sheathed cable (I, >2).
Thus, each end of
part of the cable, a push capable of causing the
the common cable 2 may be opened out into two
said firing mechanism to operate; It will also
be obvious that in all of the embodiments of the
invention illustrated, with the exception of that
or more sheathed elements, an intermediate sup
10 porting part o'r coupling member I9 being inter
yposed between the sheath I and the sheaths of
the said opened out portions to serve'both as a
support for the ends of the sheaths and as-a
guide for the cables. It will be appreciated at
15 once that the deformation of the common sheath
I produces the simultaneous operation of the ñr
ing mechanisms 1’ and 1”, the cable 2, the->
sheath I of which abutting against the part I9
has been deformed, transmitting in fact its force
20 to the’two cables 2’ and 2”, connected respec
tively to the said mechanism 1’ and l".
Figures 7, 8, 9 and 10 show diagrammatically
_ a certain number of arrangements which may be
adopted for protecting a piece of ground by
25
means of the device according to the invention.
In these figures, the reference numerals denote
the same members as in the preceding figures.
In the right hand part> of Figure 9 the numerals
4 denote points common to two independent con
l30 trols at which the cable and sheath are con
nected together.
Finally, Figures 11, 12, 13 and 14 represent
constructional modifications of the sheathed
cable by means of which the ñring mechanism
35 of the mines or other protective appliances are
released.
In the form _of construction shown in Figure 11,
the sheath is constituted by a series of spherical
beads 20, all of the same size.
40
cable, which in its turn, indirectly, through the
medium of a. release device (fracture of the re
g
In the form of construction according to Fig
of Figure 5 wherein-two mines or other explosive
appliances are connected by the same sheathed
cable, the ends 3 of the cables which are con
nected to the shoulders ß of the sheaths are either
anchored in any` suitable way or otherwise offer
at least as great resistance to movement as is
offered to the movement of the ends 5 which are
connected to the firing mechanisms. Finally, it
is also possible to consider the case in which the
cable itself is rigidly connected to the device, 20
while the sheath itself at the moment» of its de
formation would act on the firing mechanism,
any person skilled in the art being capable of
conceiving without any difficulty the detailed ar
rangements necessary for carrying into effect any 25
of these various alternatives.
What is claimed is:
1. An explosive device of the type adapted to
A lie on or to be buried in the ground and exploded
by the passage of a tank or other vehicle over 30
the ground to be protected, comprising a firing
mechanism having fixed and movable elements,
a cable and a sheath surrounding said cable
adapted to lie on or just below the surface of
the ground, said sheath being so constructed and 35
arranged as to elongate when deformed in any
portion of its length and having one end ñxed
relatively to the corresponding end of _said cable,
the opposite ends of said sheath and cable being
connected to said fixed and movable elements, 40
ure 12, a certain number of large beads 2l,
respectively, of the firing mechanism of the ex
ZI', . . . are separated from each other by a
plosive device, whereby deformation of the sheath
and cable produced by the passage of a vehicle
thereover results in operation of said ñring
mechanism.
2. An explosive device of the type adapted to
plurality of beads 20 of a smaller diameter, this
arrangement being intended to facilitate the de
45 formation and elongation of the sheath for the
reason that the large beads are driven more
deeply into the ground than the small beads, and
before the latter, thereby producing a bending
and hence an elongation of the section of sheath
50 comprised between two neighbouring large beads.
In the form of construction shown in Figure
13,- a certain number of cylindrical sleeves 22,
23 of different diameters have been associated
together. These sleeves, instead of terminating
lie on or to be buried in the ground and exploded
by the passage of a tank or other vehicle over
the ground to be protected, comprising a -ñring
mechanism having ñxed and movable elements, 50
and a sheathed cable adapted to lie on or just
below the surface of the ground consisting of a
non-extensible cable and an extensible sheath
therearound, one end of said sheath being ñxed
relatively to the corresponding end of said cable,
the opposite ends of said sheath and cable being
associated either with adjacent concave ends or
connected to said fixed and movable elements,
with convex ends, so as to prevent the cable in- - respectively, of the firing mechanism of the ex
curring the risk of being damaged by shearing at plosive device, whereby deformation of the sheath
60 the moment of the deformation of the device. As and cable in any portion of its length by the 60.
shown in the right hand part of Figure 13, the passage of a vehicle thereover produces a move
55 in faces perpendicular to their axis or convex at
-both their ends„are provided with concave ends
ends of the sleeves may likewise be ñtted into one
another over a slight depth and with suñîcient
play to allow the desired amount of bending to
take place.
In the form'of construction shown in Figure
14, the sheath is constituted by a kind of tube
formed by a helical spring having its turns
touching each other, the eventual elongation of
which results directly from its being crushed.
In the particular form of construction de
scribed with reference to Figure 3 of the accom
panying drawings, provision has been made for
the deformation of the sheath at the moment
75 of the passage of a tank, to produce a pull on the
ment of the last named end of said cable sufficient .
to effect the operation of said firing mechanism.
3. An exploding device according to claim 2
wherein said extensible sheath is constituted by
a plurality of separately formed elements of dif
ferent diameters threaded on said .cable and in
normally contacting relation with one another.
4. An exploding device according to claim 2
wherein said extensible sheath is constituted by 70
a plurality of separately formed beads of diifer
ent sizes threaded on said cable in normally
contacting relation with one another, each two of
the larger beads being separated by a plurality
of smaller beads.
’
75 1
3
2,128,839
5. A common operating means for the firing
mechanisms of a plurality of explosive devices
of the character described comprising a non
extensible cable having a main portion and a
plurality of branch portions extending from said
main portion to the firing mechanisms of said
plurality of explosive devices. a separate section
of extensible sheathing surrounding each of said
main and branch cable portions, and a coupling
10 member located at each junction between said
main and branch cable portions and so con
structed and arranged as to both guide said cable
portions and support the ends of said sheathing
sections, the end of each of said branch cable
15 portions and the corresponding end of the sur
rounding section of sheathing being so connected
. to the ñring mechanism of the associated explo
sive device that relative movement therebetween
caused by cable and sheathing deformation re
20 sults in operation of said ñring mechanism.
6. A common operating means for the ñring
mechanisms of a plurality of explosive devices
of the character described comprising a non
extensible cable having a main portion and a
plurality of branch portions extending from one
end thereof to the firing mechanisms of said
plurality of explosive devices, a section of extensi
ble sheathing surrounding said main cable por
tion and having one end fixed relatively to the
end of the cable opposite to its branched end, a
separate section of extensible sheathing sur
rounding each of said branch cable portions, and
a coupling member located at the junction be
tween said main and branch cable portions and
so constructed and arranged as to both guide said
cable portions and support the ends of said
sheathing sections, the end of each of said branch
cable portions and the corresponding end of the
surrounding section of sheathing being so con
nected to the ñrlng mechanism of the associated
40
explosive device that relative movement there
between caused by cable and sheathing deforma
tion results in operation of said firing mechanism.
7. Apparatus of the character described for
protecting the ground of military operations com
prising a plurality gf explosive devices adapted
to lie on or to be buried in the ground at sepa
rated points and including firing mechanisms
operable by the passage over the ground to be
protected of a tank or other vehicle, a non
extensible cable extending to all of the said ex 10
plosive devices, and an extensible sheath around
said cable, said cable and sheath lying on or just
below the surface of the ground with the ends
thereof adjacent each explosive device so con
nected to the associated ñring mechanism that 15
the relative movement therebetween caused by
deformation of said cable and sheath due to the
passage of a vehicle thereover results in Voperation
of said ñring mechanism.
8. Apparatus of the character described for 20
protecting the ground of military operations com
prising a plurality of explosive devices adapted to
lie on or to be buried in the ground at separated
points and including ñring mechanisms operable
by the passage over the ground to be protected of 25
a tank or other vehicle, a non-extensible cable
having a main portion and a plurality of branch
portions extending therefrom to said explosive
devices, and an extensible sheath surrounding
said main and branch cable portions, said cable 30
and sheath lying on or just below the surface of
the ground with the ends of each branch cable
portion and the associated section of sheath so
connected to the firing mechanism of the explo
sive device to which they extend that the relative 35
movement therebetween caused by deformation
of said cable and sheath due to the passage of a
vehicle thereover results in operation of said ñr
ing mechanism.
NICOLAS EMILIEN METHLIN.
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