Improvements in Extractor Mechanism for Drop Down Small Arms.
Year: 1887

page_text: Date of Application, 23rd May, 1887
Complete Left, 21st Mar., 1888
Complete Accepted, 4th May, 1888
Improvements in Extractor Mechanism for Drop Down
Small Arms.
ISAAC BULLOCK Gun Action Maker 11 St. Marys Row Birmingham Warwickshire
REUBEN BULLOCK Gun Action Maker 11 St. Marys Row Birmingham Warwickshire
do hereby declare the nature of this invention to be as follows:-
An improved method of intercepting the flight of unfired cases from drop down
guns fitted with ejectors. By means of a cam single or double cam fitted to the
projecting rib the said cam or cams overhanging the rim of cartridge cases before
fireing and being placed in position to release the fired cases by means of small pistons
fitted in the recess that receives the projecting rib (in the breech action) and which is
actuated by the falling of the hammer on the strikers. A small piston fitted in centre
of the afforesaid recess presses the cams open on to the rims as the gun is closed. The
cases when released being ejected from the chambers by means of the Extractor leg
being forced backwards by a spiral spring pressing against the Extractor leg which is
held in check by a cam fitted into the lump under the hook of joint pin which releases
the Extractor at the proper time by the opening of the gun.

page_text: Small Arms.
ISAAC BULLOCK Gun Maker 11 St. Mary's Row Birmingham Warwickshire
REUBEN BULLOCK Gun Maker 11 St. Mary's Row Birmingham Warwickshire 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:
By means of a cam or cams fitted to the projecting rib of barrels, the said cam or
cams overhang the rims of cartridge cases before firing, and being placed in position
to release the fired cases, by means of small pistons fitted in the recess in the breech
action, that receives the projecting rib, and which is actuated by the falling of the
hammer on the striker. A small piston fitted in the centre of the aforesaid recess
presses the cams open on to the rims as the gun is closed. The cases when released
being ejected from the chambers, by a spiral spring pressing against the extractor leg
which is held in check by a cam fitted into the lump under the hook of joint pin,
which releases the extractor at the proper time by the opening of the gun.
In proceeding to fully describe our invention which is applicable to all kinds of
drop actions we shall therefore in the accompanying drawings use only the outline of a
drop gun without reference to any particular system of bolting. The accompanying
drawings have reference only to our improvements in the ejecting of the cartridge
cases after firing, and the intercepting of the unfired cartridge, and the manner in
which the same is performed and hereafter described.
Fig. (1) is a side view of the barrels and action shewing the extension rib A into
which is fitted two intercepting arms or cams the several parts of which are lettered
respectively.
Fig. (2) is a front view of the barrels and extension rib shewing the two intercepting
cams CC opened out to intercept the unfired cases.
Fig. (3) is a front view of barrels and extension rib A shewing the intercepting
cams CC closed so as to permit the fired cases to be ejected.
Fig. (4) is a top view of the action shewing the recess D into which the extension
rib A falls when the gun is closed. Also shewing the small pistons E E and centre
piston F and the strikers G G by which the intercepting cams are closed.
Fig. (5) is a top view of the action shewing the position of the small pistons E E
and centre piston F and the strikers G G when the intercepting cams are open.
Fig. (6) shews the face and the top of the action and the recess D at the back of
which is shewn a square drifted hole H.
Fig. (7) is a side view of the barrels I shewing lump J into which is fitted the
cam K shewing how the cam K is forced down into a notch L (made in the extractor
leg M) by the small piston N at the back of the joint hook O. Also shewing the
propellor P on which is a strong spiral spring Q pressing against the loop R and the
collar of the propellor the point of which is fitted into the end of the extractor leg.
Fig. (8) shews all the parts for ejecting and intercepting.

page_text: On each side of the extension rib A we cut slots B (as shewn in Fig. 1) into which
we fit the intercepting arms or cams CC they move on and are held in their place by
drilling a small hole in the front of the extension rib across the slot B, into the base
of the extension rib a pin S is fitted in the hole which passing through the hole in
the intercepting cam,
the said cam moves transversely across the face of the barrels
just sufficient when open to intercept the cases, and when closed to allow the cases
to pass.
The extension rib A being the same size and shape as the recess D (as shewn in
Figs. 4 & 5) it will be seen that the extension rib A is narrower at the bottom than at
the top (Figs. 2 & 3) But the recess D into which the extension rib falls is as large
at the bottom as at the top by that means giving space for the interceptor to open the
required distance.
In the back of the recess D exactly in the centre we drift a square hole H (Fig. 6)
at a proper distance from the top, into which is fitted an automatic square piston F
(Figs. 4 & 5) A hole is drilled in the back of this piston F and a small spiral spring
inserted, which, bearing on the bottom of the hole H presses the piston forward into
the recess D but is checked by a stop pin fit in the top of the action, which, fitting
into a corresponding notch filed in the top side of the piston F so regulates the
distance the piston shall move forward. The point of this piston is angle shaped on
the top; underneath it is a broad slanting surface. The bottom of the interceptors
are filed V shaped (Fig. 8) and in closing the gun the V shape on the interceptors
falls on the angle point of the piston F and is so split open to the required width and
will always remain open untill the gun is fired.
When either of the barrels are fired then the head of the striker G (Figs. 4 & 5)
presses forward the piston E which is fitted into a hole drilled from the top of the
striker hole at an angle to come into the recess D at the bottom immediately opposite
the bottom of the interceptors. The point of the piston E being pressed forward by
the falling of the hammer on the head of the striker closes the interceptors. If one
barrel only is fired only one interceptor is closed.
When the interceptors are closed in the manner first described, and the gun is
opened the broad slanting surface of the under side of the centre piston F rides over
the interceptors without splitting them open and the spiral spring allows it to
recede.
To keep the interceptors always a little tight in their movement so that they will
not rebound when closed by the blow from the pistons E E a small spring T is
screwed on by means of a pin under the base of the extension rib A the ends of which
are turned at right angles under the ends of the interceptors.
The pistons E E have spiral springs on them which forces them against the bead of
the strikers G G so that when the hammers fall back the pistons EE recede leaving
the recess D clear from obstruction.
Having now described the mode of operating the interceptors we will describe the
mode of ejecting.
The barrels are fitted with an ordinary extractor the leg sliding down the hole in
the lump (Fig. 7) in the centre of the lump J under the hook O is cut a slot into
which is fitted the cam K. We drill a hole across the lump fit in a wire which
passing through the hole in the cam K holds it in its place. By the closing of the
gun the extractor leg M is forced down the extractor hole of the lump and the cam K
is forced into the notch L by the piston N the point of which rests on the cam K and
is forced down by the spiral spring on the top of it. The hole to receive the piston N
and spring is drilled from the top of the lump behind the hook O. The extractor is
now locked and the propellor which lies between the barrels on the bottom rib is
forced back, The end of which slides in a hole drilled in the keel of the loop R.
When the gun is opened to the proper distance the lifter V on the knuckle of the
action (Fig. 1) comes in contact with the cam K and so lifts the cam out of the
notch L The extractor being now released is pressed forward by the propellor with
sudden force and so ejects the cartridge.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is performed we declare that
(1st.) We claim to fit in the hole H at the back of recess D the automatic piston F
by which the interceptors are split open.
(2nd.) The combination of the pistons E E with the head of the strikers G G for
the
purpose of closing the interceptors.
(3rd. The combination of the cam K with the extractor leg M for the purpose of
holding in check the extractor till the right time as before described and set forth for
the purpose of intercepting the flight of the unfired cartridge cases in drop down
.firearms.
ISAAC BULLOCK.
REUBEN BULLOCK,