Is it possible to raise the viewing count with just calm discussion alone? Let’s see. Normally, I make posts inspired by thread comments, but this is a first, as I was kindly requested to explain bites. For the sake of moving this thread along, I will do so using British gunmaking as the basis for explaining what I happen to know on the subject, and I hope the person requesting the explanation will be satisfied. Due to CGN's limitations and my long-windedness, I have to do this in two parts.
Bites are typically squared notches in barrel lumps, with the lumps being extensions under the barrels on double- and single-barrelled hinge actions. One lump has a hook to engage the hinge pin, while another has a bite to engage a locking bolt, or multiples thereof. Sometimes, the lump with the hook and the locking bite are the same; it all depends on the construction. There. I could stop at this point, the request fulfilled. But the story of how many bites to use, where to put them, and how to engage them, is manifestly complex, and going from no bites (muzzle-loaders) to the standard double-bite, sliding under-bolt system used in almost every hinge action gun for the past 100 years, all occurred in the brief period of the British pin-fire game gun, so I am more than happy to bore you with the details.
There are only two kinds of breech-loading shotgun arrangements. In one, the breech block is fixed and the barrel moves (the afore-mentioned hinge action), and in the other, the barrel is fixed, and the breech block moves (pumps, autos, Darnes, falling-blocks etc.). When the breech-loader was first introduced, the idea of a moveable barrel was too much for many to accept, and in the shooting press much ink was spilled warning about the dire consequences of such irrationality.
Ask an amateur historian, expect some history. In the first half of the 19th century, the muzzle-loader rose to its pinnacle of development, incapable of improving its core design and construction. The barrels are fixed firmly in place, hooked in at the standing breech and held to the stock with a cross-pin fastener (also known as a key fastener; guns with very long barrels might have two of these). Therefore, It is not surprising that the first breech-loading sporting guns, made by the Parisian inventor and gunmaker Joseph-François Prélat and the Swiss-born gunmaker Jean Samuel Pauly (Samuel Johann Pauli), around 1808, had fixed barrels. Think of a Darne action, if the breech swung up instead of sliding back, and you would be in the right ballpark. Prélat and Pauly also patented a barrel that pivoted down, but it was the lifting-breech version that was marketed (to only limited success). The difficulty in getting any breech-loading mechanism to work is to make it gas-tight; anything less is not sufficiently efficient to drive a charge forward (let alone the unnerving effect of escaping hot gases beside your face). The early breech-loaders were not gas-tight, so they weren’t particularly good, especially compared to muzzle-loaders. In 1814, Pauly took on a 14-year-old apprentice, Casimir Lefaucheux; fast-forward to 1827, and Lefaucheux was running the business started by Prélat, Pauly and others. In 1828, Lefaucheux invented the pin-fire system, though he didn’t patent it until seven years later. Around 1832, Lefaucheux moved away from the lifting breech idea, developing instead a hinge action, with a drop-down barrel rotating on a hinge pin.
Having a movable, hinged barrel for a breech-loader was a good idea (for all the reasons we understand today). The challenge was how to fix the barrels securely to the action, in a way that could be quickly released for loading, and then back to being secure for firing. For this, Lefaucheux employed a bevelled interrupted screw engaging twin lumps under the barrels, activated by a forward-facing rotating under-lever (or by a rotating trigger guard, acting as a rearward-facing under-lever). Turned one way, nothing stops the barrels from tilting upwards; turned the other way, the interrupted screw engages the lumps and wedges down the barrels and holds them secure (this became the standard configuration of Lefaucheux-action guns, into the 20th Century). The lumps were brazed onto the barrel tubes (more modern guns employ stronger methods, such as chopper-lumps, worthy of a separate discussion). Apologies for the long-winded introduction, but that is how we got to hinge actions, lumps, and bites in the first place.
The pin-fire system was presented to the British public at the Great Exhibition in London in 1851, to Lefaucheux’s credit. Arguably there were British gunmakers who already knew about the pin-fire system, since it was around for almost 20 years in France, but this advance was studiously ignored. Pin-fire guns were also being built by an assortment of French makers, several of whom brought their own improvements, modifications, and alternate constructions to the Lefaucheux action. Here is Lefaucheux’s gun as exhibited in London, courtesy of the engravers at
The Illustrated London News, published in their 5 July 1851 magazine supplement. Note the two barrel lumps, and the two inward-facing bites on the lumps.
Here is the same double-bite Lefaucheux action, on a gun by Châlet, Père et Fils of St. Étienne, France @ 1856.
Two bites make sense from an engineering standpoint; the slanted edges of the interrupted screw turned by the lever essentially wedge the lumps downward, in contact with the bites or notches cut into them. Which is why it is curious that the first British-made pin-fire guns did not copy Lefaucheux’s strong fastening system, going instead for a mechanically inferior single-bite action, copied from another Parisian gunmaker, Beatus Beringer, who also had a display at the London Exhibition. Two versions of what happened next can be found in print. The first is that upon seeing the Lefaucheux gun on display in 1851, the renowned London maker Joseph Lang had an epiphany, and shortly afterwards started building and selling a British version, his own invention, shortly after the Exhibition closed in October of 1851. The other version is that a young gunmaker, Edwin Charles Hodges, who had freshly finished his apprenticeship, saw the Lefaucheux gun, made a copy after the Exhibition closed, and convinced Lang to build and sell it. Neither of these stories make sense to me – It’s like going to Cabela’s, seeing an Auto-5 on display on a rack for the first time, then going home and building one from scratch. A more plausible scenario is that Hodges, inspired by the Exhibition displays by several French gunmakers, sought a French gun to disassemble and examine in great detail. These were in circulation, though in very small numbers. Hodges happened not on a Lefaucheux but on a Beringer, and he copied the action precisely, right down to the small mechanically-rising stud to help with opening and closing the action. He took his copy to Lang, convinced him to take the leap, and built his own business as an actioner of breech-loading actions, to Lang and the prestigious London trade. The first Lang breech-loader appeared in late 1853 or early 1854, as confirmed by Lang himself (and not the end of 1851 or early 1852, as is generally reported in 20th century gun literature), which is more in keeping with the time to get one’s hands on a gun to study, and the long time it would take to understand it and make all the necessary parts with saws, files and chisels.
16-bore single-bite Lang-type underlever, by John Blissett of London, actioned by E. C. Hodges, @1859.
16-bore single-bite rear underlever, by William Moore & Co. of London @1862.
Until about 1859, all British pin-fires had actions with a single bite, based on the Beringer design. Neither the Lefaucheux double-bite action nor the Lang single-bite action was patented in Britain; anyone could copy them, but strangely, no one copied the mechanically superior Lefaucheux action, sticking instead to Lang’s Beringer copy. The single bite actions were strong enough, if built well, and the contact surfaces were fitted by hand with extremely close tolerances. A number of these have survived to this day, despite heavy use (many thousands of shells per shooting season). Single-bite actions were also built long after double-bite designs appeared, so a single bite was considered strong enough by most gunmakers of the day. The other design on the market, the slide-and-drop action from Charles Lancaster, began in 1853 (the patent having been bought in that year from the Parisian maker Louis Julien Gastinne), also employed a single bite, coupled with an eccentric screw, moved by an underlever, that moved the barrels forward before allowing them to drop. These were very expensive, so few were built.
The Charles Lancaster slide-and drop, 1864.
In 1855, the Bastin Brothers of Hermalle-sous-Argenteau, Liège, went another way, doing away with bites and having the barrels slide horizontally to open the breech; this action had a certain amount of popularity in Britain, incorporated into guns by London makers such as James Purdey.
Bastin action on a gun by the Masu Brothers of London and Liège, @1865.
End of Part One.