 |
Crankfire
Systems TM
Welcome
to Emory Jones Original Crankfire Systems
TM
Crankfire
Systems
TM
very first product
,
the Crankfire allows you to operate a semi-auto 1919a4 at
near full-auto firing rates. Several different versions, exist.
Single, Dual, and even Quad linkages!
For
Pricing information scroll down below or click
| Introduction
to the Crankfire: |
|
The Crankfire
Systems
TM
unit is the first and only serious attempt at developing a
truly functional crank operated, cam activated, Gatling type,
trigger device for use on semi auto firearms. The numerous
unique (Patent Pending) features incorporated in the design
are combined to achieve an unmatched level of performance
in this regard. The Crankfire unit will effortlessly operate
any 1919A4/6 semi auto at that particular gun’s maximum
achievable rate of fire. Pact timer readings indicate that
for the most common semi auto designs, the rate is about 470
rounds per minute. Whether single, twin or quad gun systems
are desired, the Crankfire unit is designed to do the job.
In multiple gun systems, all guns can be timed to fire alternately,
and yet all the guns will automatically go to a trigger down
(sear reset) position when crank rotation is stopped. When
the rotation is resumed, each gun will automatically pick
up and fire alternately again. Quick disconnect, flexible
shaft (Bowden Wire) linkage and special shafts, facilitate
the connection of multiple guns/units and allow for the individual
elevation and windage adjustment of each gun in the mount.
So whatever the application may be, the Crankfire
Systems
TM
will provide as close to full auto performance as is possible,
short of spending $12,000.00 for a registered FA 1919. |
| Mounting: |
| The
Crankfire unit is designed to mount on the 1919A4 back plate
buffer tube by means of a clamp that is an integral part of
the main frame/housing. This allows the unit to be used with
any tripod and/or tripod adapter currently available. This also
results in no interference with any part of the gun and as issued
accessories. Some after market optics/mounts will require a
modified crank handle to clear, if the crank is used on the
left side. There are no modifications to the gun required and
access is provided for locking the bolt return spring rod into
the bolt, to facilitate field stripping of the weapon with the
unit in place. This mounting location also provides for the
most ergonomically friendly position of the crank handle for
the operator, and minimizes the disturbance of gun alignment
from crank operation. |
| Construction: |
| The Crankfire is all
steel, no plastic, no aluminum and no Automotive/Home Repair
Center type components. Each unit is constructed from 18 purpose
designed and custom machined pieces. Some of these are combined
into three TIG welded subassemblies. Everything is then blasted,
parkerized and assembled with 24 pieces of hardware; stripper
bolts, allen heads, springs and pins. Each unit is then function
tested and packed with complete installation and operating instructions. |
| Adjustable
Trigger Slide: |
| The Crankfire unit design
provides a simple but most effective adjustment of the trigger
slide/roller position, relative to the many variations of trigger
shapes and locations encountered on the various semi auto conversions
in use. This is important for multiple reasons, interchangeability
between different guns, ease of installation/setup and most
importantly it allows the unit to be tuned, to move in exactly
the area required, and effectively trip the trigger with out
excess time spent in over travel take up. |
| Internal
Spring Load, Rollerized Follower, Floating/Pin Type Cam: |
| While these are actually
three distinct features of the design, they act in concert to
provide the most important capability of the Crankfire
Systems
TM
unit. Not only do they allow the trigger to automatically go
to the reset/trigger down position when the crank rotation is
stopped (for safety and multiple gun timing/operation) More
importantly they allow the trigger to automatically go to the
reset position while the crank/input shaft is being rotated
to fire the gun. Because the radial position of the cam is allowed
to rotate/float, independent of the position of the input shaft/crank,
the instant that the follower roller crests the pin/lobe and
fires the gun, the internal spring load acts to move the trigger
slide/follower to the reset/trigger down position. This pressure
causes the follower roller to effectively move the cam lobe
out of the way by accelerating the rotation of the cam ahead
of the rotation of the input shaft/crank. This allows the "Maximum"
amount of time for the trigger disconnector to re engage the
sear for the next shot. We’re only talking thousandths
of a second here, but it does make all the difference in the
world. |
| Deadman Crank/Burst
Fire: |
The spring loaded clutch
drive crank serves as a safety element to disengage the crank
from the input shaft automatically, whenever the operator releases
pressure on the handle. This combined with the automatic reset
position function of the floating cam, renders the unit in neutral/non
firing condition without any conscious effort by the operator.
This arrangement also serves to allow very fast, yet controllable
burst fire. By rapidly rotating the crank handle in the disengaged/out
position, and then moving it quickly to the engaged/in position
and back out again, very fast, short and controllable bursts
can be fired.
|
| Right hand/Left
hand Operation: |
| The rotating assembly
is built in the "Mirror Image" configuration. All
units can be set up for either hand with the same parts by simply
removing the cam drive roll pin and the E clip on the end of
the input shaft, and reversing the components in the housing,
and reinstalling the pin and E clip. Takes about two minutes.
This part of the design also facilitates the linking of units
in any multiple gun configuration, in either hand or remote
crank positions. |
| Appearance: |
| The Crankfire
Systems
TM
unit is a square/boxy, slab sided chunk of parkerized steel.
This is because the gun it goes on is exactly the same in appearance.
It takes more time to make and costs more to do it this way.
But no matter how well anything works, if it doesn’t look
right, I won’t put it on my guns. |
| Pricing: |
|
For Crankfire Price and Availability click
below.
|
A single Crankfire unit.
Attaches to a semi-auto 1919a4/a6 and allows close to full-auto
firing rates (approx: 470 rounds per minute) |
| |
|
| |
|
| |
|
|
Products for the Semi-Auto
Browning Machine Guns 1919A4, 1919A6, Ma Duce including
Crankfires, Spade Grips.
Legal Notice "All
Crankfire Systems Gatling type Secondary Fire Control units,
components and design features are covered by U.S. Patent
#7,103,999 B2. Other Patents Pending."
Last Update: Jun 2008 |
|
