TM 9-1375-213-12
(150 devices) are packed in a wooden box. Total
tends through slots opposite an inspection hole
weight of box with contents is 78 pounds, Five
near the primer of the coupling base. The color of
M1A1 devices are packed in a box, 50 boxes (250
the identification and safety strip indicates the
devices) are packed in a wooden box, Total weight
length of the delay that the device functions
of box with contents is 80 pounds.
(3) Firing device, demolition: M5, pressure-
end of the device where it is held by a screw,
release-type (figs. 124 and
125). Pressure-re-
along the ampoule, through a firing pin spring,
lease-type demolition firing device M5 consists of
and to the firing pin to which it is attached.
a rectangular pressed-steel case containing a
Table 1-4. Delay-type Demolition
Firing Device M1--Data
spring-loaded striker. The striker is restrained by
a release plate, which is held in place by a safety
pin. A coupling base is fitted into the threaded
hole in the bottom of the case. This device is used
to activate antitank mines equipped with supple-
mentary fuze wells (cap wells) and for general
boobytrap installations with charges having
threaded cap wells. Four presaure-release-type
demolition firing devices M5 are packed in a
paperboard box, 5 boxes in a fiberboard box, 10
boxes (200 devices) in a wooden box, The weight
of the box with contents is 51.9 pounds.
(4) Firing device, demolition: M1, pull-type
device M1 is designed for actuation only by a pull
(2) Firing device, demolition: M1 and M1A1,
on a trip wire and is intended for use with impro-
pressure-type (figs. 122 and 123 ).
Pressure-
vised antipersonnel mines, for boobytrapping an-
type demolition firing devices are similar in func-
titank mines, and for setting up boobytraps. This
tioning and appearance. They are designed for
firing device consists of a cylindrical case (body),
actuation by pressure and intended for use in
head, and coupling base, The head, which is per-
mines and booby traps. The firing device consists
manently joined to the case, contains a release
of a head, case, and coupling base. The case that
pin, release pin ring, a loading spring, and a
contains the firing mechanism has three lugs, each
safety pin. The case, which contains the. firing
with a hole for use in anchoring the device. The
mechanism consisting of the firing pin and com-
firing mechanism consists of a spring-loaded firing
pression spring, also contains a positive safety
pin held in the cocked position by a firing pin
pin. The coupling base, which is screwed into the
release pin, which is attached to the pressure cap.
case, contains the primer. The outer end of the
This is accomplished by a keyhole-shaped opening
coupling base is threaded to fit activators and
in the trigger pin. The smaller part of this open-
demolition charge cap wells, A blasting cap may
ing fits into a groove in the firing pin (cocked
be assembled to the nipple. The pull-ring end of
position); the larger part of the opening permits
the firing pin, which is slotted axially to form
the free movement of the firing pin upon release.
four jaws, passes through a cylindrical opening
The head, an integral part of the case, contains
in the case. The end of the release pin, fitting into
the firing pin release pin mechanism, which termi-
an axial hole in the slotted end of the firing pin,
nates in a pressure cap. A tapped hole in the
causes it, to engage on the upper surface of the
opening, thereby restraining downward movement
center of the pressure cap is provided for use of
of the firing pin. The safety pin, which passes
an extension. The coupling base, which screws
through a hole in the head and a hole in the re-
into the case, contains the primer. A removable
fork, located under the pressure cap, prevents
lease pin, prevents accidental movement of the.
release pin during shipment and handling. The
movement of the firing pin release pin. The safety
pin, which passes through a hole in the case be-
positive safety pin, which passes through a hole in
tween the firing pin and the primer of the cou-
the case between firing pin and primer, prevents
pling base, prevents the firing pin from striking
the firing pin from striking the primer should the
the primer should the firing pin be accidentally
firing pin be accidentally released. An anchor cord
released. Five pressure-type demolition firing de-
on the case is used to anchor the firing device
vices M1 are packed in a cardboard box, 30 boxes
firmly during installation. Five pull-type demoli-