An Improvement in Percussion Primers.
Year: 1899

page_text: Date of Application, 1st Apr., 1899
2000
3711 •
1000
PROVISIONAL SPECIFICATION.
An Improvement in Percussion Primers.
We, ARTHUR TREVOR DAWSON, Late Lieutenant, R.N., Director and Super-
intendent of Ordnance Works, of 28, Victoria Street, Westminster, in the County
of London, and JOSEPH PARKER, of Cicely Villa, Junction Road, Dartford, in
the County of Kent, Engineer, do hereby declare the nature of this invention
to be as follows:
This invention relates to the construction of a primer which can be introduced
into the charge in a gun and fired by a blow.
The primer is of cylindrical form its front part being hollow and charged with
fine grain or pistol powder. Behind this charge is screwed in an anvil piece
having a central vent through it lined with compressed meal powder.
The rear face of this anvil piece is recessed to receive the percussion cap which
is held in the recess by burring the metal edge of the recess over the rear edge of
the cap. Behind the cap, is fitted to slide a striker of piston form, the central
part projecting forward beyond the body of the piston and having around it a
cupped recess formed in the face of the piston. The stem of the striker extends
through a central hole in the rear of the primer and has rivetted on its end a
button lodged in a recess in the rear end of the primer. A transverse hole is
bored through the rear part of the primer and the stem of the striker and through
this is passed a safety wire which prevents the striker from being accidentally
displaced. When the charge has to be fired, a blow is struck on the button at
the end of the stem of the striker: the safety wire is thus broken and the front
projection of the striker fires the percussion cap the flame from which passes
through the vent and fires the front powder charge.
Dated this 1st day of April 1800
ABEL & IMRAY,
Agents for the Applicants.
An Improvement in Percussion Primers.
We, ARTHUR TREVOR DAWSON, Late Lieutenant, R.N., Director and Super-
intendent of Ordnance Works, of 28, Victoria Street, Westminster, in the County
of London, and JOSEPH PARKER, of Cicely Villa, Junction Road, Dartford, in
the County of Kent, 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:—
This invention relates to the construction of a primer which can be introduced

page_text: into the charge in a gun and fired by a blow. The accompanying drawing is
a longitudinal section of a primer according to our invention.
The primer is of cylindrical form, its front part a being hollow and charged
with fine grain or pistol powder b. Behind this charge is screwed in an anvil
piece c, having a central vent d through it lined with compressed meal powder.
The rear face of the anvil piece c is recessed to receive the percussion cap e
which is held in the recess by burring the metal edge of the recess over the
rear edge of the cap. Behind the cap is fitted to slide a striker f of piston
form, the central part 9 projecting forward beyond the body of the piston and
having around it a cupped recess h formed in the face of the piston f. The
stem of the striker extends through a central hole in the rear of the primer
and has rivetted on its end a button 7 lodged in' a recess m in the rear end n
of the primer. A transverse hole is bored through the rear part of the primer and
the stem of the striker, and through this is passed a safety wire p which prevents
the striker f from being accidentally displaced. When the charge has to be fired,
a blow is struck on the button 7 at the end of the stem of the striker; the safety
wire is thus broken and the front projection g of the striker fires the percussion
cap e, the flame from which passes through the vent d and fires the front powder
charge b
Having thus particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, we declare that
what we claim is:-
A percussion primer comprising a cylindrical casing having a front chamber
charged with powder, a perforated and recessed anvil block screwed into the
primer, a percussion cap held in the recess of the anvil block, a striker of piston
form adapted to slide in a bore of the primer casing and provided with a button
head lodged in a recess of the primer head, and a transverse safety wire holding
the striker, substantially as described.
Dated this 23rd day of December 1899.
ABEL & IMRAY,
Agents for the Applicants.