Quiz Flashcards
It is a small container or wafer of explosive material used to ignite the gunpowder
Primer
The upper portion of the primer cup which is the complete assembly of priming composition,
paper disk, anvil and vent.
primer
Contains a highly sensitive mixture of chemical compound which when struck by the firing pin would detonate or ignite. Such reaction is called percussion.
primer
Composition of Priming Mixture
- Potassium Chlorate – 45 %
- Antimony Sulfite – 23%
- Fulminate Mercury – 32%
– the first to conceive an idea of using a detonating compound for igniting powder charge in small arms by percussion, and obtained a patent for this idea. He was then considered as the Father of Percussion.
Alexander John Forsyth
has ONE vent/flash hole invented by Colonel Edward M. Boxer, a British Army.
Boxer Primer
has TWO vents/ flash holes, invented by Colonel Hiram Berdan, a US Army
Berdan Primer
has THREE vents/flash holes
Berdan-Boxer Primer
used for shotgun shells, a variation of Berdan
Battery cup type
early primers
corrosive
mostly used at present
non-corrosive
where the priming mixture is crushed by blow from the firing pin.
anvil
piece of small paper or disk of tin foil that contains the priming mixture that is being pressed over the anvil. It has 2 purposes: 1) To hold priming mixture in place and 2) To exclude moisture.
disc
container of the anvil, disc and priming mixture. This is made of brass, gilding
metal or copper.
primer cup
is a highly sensitive mixture of chemical compound contained in the primer
cup
priming mixture
gives up its oxygen readily. The oxygen is needed to burn the fuel
oxidizer (barium nitrate)
set off with a sharp blow, as when the firing pin strikes the primer
cup.
initiator (lead atyphnate)
burns the gunpowder in very high rate that results to the propulsion of bullet
fuel (antimony sulfide)
in order to fire before, the gunpowder must have to be ignited
igniting the propellant
were the earliest firearms which use closed tubes, that needs manual ignition of its
gunpowder
cannons
a small aperture drilled in the closed end of the tube, leading to the main powder charge. This hole was filled with finely ground powder, which was then ignited with a hot ember or torch
touchhole
around the rim
rimfire
external pin is used in igniting the priming mixture
pinfire
combination of rim and pinfire, uses a pin that strikes a ring of a priming
compound
peripheral primer
no rim. rounded at the rear, with a small “teat” that would protrude through a tiny opening in the rear of the cylinder
teat-fire
primer is located at the center
centerfire
Used by larger military gun and cannon rounds (such as the M50 20mm) utilize an internal electric primer that is activated by an externally-provided electric charge
electric-primed
A a British Army who has invented ONE vent/flash hole.
Colonel Edward M. Boxer
a US Army who invented TWO vents/ flash holes.
Colonel Hiram Berdan
