c-g-designs

This system was patented in 1990..

Its main features are:

-1) A Power Pack composed of a stack of Spring Cup Washers, currently named  in the iustry "Belleville Washers" from their inventor, or more  precisely ‘Spring Discs’’.

Why using a Belleville washers as power pack?:

---This spring system is the most powerful under small axial displaceents and of much lighter　mass as compared to conventional coil springs.

---When a conventional firing pin coil spring is often over 100mm (4 inches)  long, and need pre-compression to at least 2/3 of its initial length to store sufficient energy to action the firing pin, the actual C.G  Belleville stack is only 26,3 .mm(1.035'') high and is only compressed when the action is cocked. In decocked position, the pre-compression is non-existent, a major advantage, as the spring discs system does not loose power in the long run if left cocked for  long periods of storage (when the bolt is kept stored out of the action for instance). When bolt is in place and decoked, there is no load at all on the Bellevilles. As stated above, a coil spring is ALWAYS under full force compression, even when de-cocked and can loose power with time, even if made of superior metal quality.

---The system develop more energy than a coil spring,but with a much lighter mass (170Newton in comparison to some 100-110N for the coil spring).

This allow:

A considerable reduction of firing pin travel: under 4mm on dry firing (.157’’) as compared to a minimum of 6mm (.236’’) for the conventional coil spring (.270’ on the popular Reminton 700 for instance).

As the Bellevilles system weights only a small fraction of the coil spring system, total firing pin  mass is reduced accordingly. The average moving mass of a C.G firing pin, including the Bellevilles stack is about 45 grammes (1,60 ounce).

Also, each individual spring washer being compressed when cocked at only 60% of its maximal capacity (170N. for a maximum capacity of 298N.), in both power capacity and compression range, each Belleville having only an individual compression displacement of 0,12mm (.0048’’), spring inertia and vibrations are neglectible.

The reduction in mass and shorter travel, and also the superior spring energy allow a much reduced locktime, in the order of 1,3 to 1,4 milliseconds.

-2°) An inertia Firing Pin Tip.

Why using a Floating Firing Pin tip?

Lets take an example: Like an inert Snooker ball hit by a moving one, the inert ball recovers instantly the full amount of the energy accumulated by the moving one. This striker system works in a quite similar way.

An other example can be those of the hammer blow on a centre punch: One can use a light hammer and a sharp fast blow, or use a forge hammer and a heavy, slow blow, to obtain the same indentation.. I choose the solution using the fast blow of the light hammer!!!

Also, this tiny double-ended Firing Pin piece can then be easily made of superior quality material and process ( high grade hi-impact resistance tool steel as used for high speed stamping punches) .

In the unlikely event of a firing pin tip break, this double-tipped part is fully interchangeable, and can be replaced (reverted) in seconds without altering the parts settings (in other words the protrusion), and with practically no shooting interruption.

All production models of the C.G INCH, and now the C.G DELTAs 59 and 66 have now a double-tipped Firing Pin, this allowing to have always the spare tip stored IN the Bolt. In case of an exchange necessity, suffice to revert the firing pin back to front, and continue firing as if nothing happened….

R.G.C

07/2009