Bar-Hammer percussion revolver It is uncertain when production of the bar-hammer revolver began or ended. The 1845 patent on the bar-hammer is the same as on the pepperbox and some single-shot pistol models. It is likely some number of years after 1845 before this type was produced. A patent for Rollin White was issued in 1858 that pictured a modified Allen bar-hammer revolver. This would seem to indicate that production started no later than 1856–1857. However, it is possible that production started several years earlier. Production almost certainly ended before the end of the Wheelock era (c 1864). This is based on no more than the logic of simplifying production. In 1861, it is possible that Allen produced the bar-hammer, side-hammer, and center-hammer percussion revolvers as well as the rimfire and lipfire cartridge revolvers simultaneously. Because demand from the Civil War was consuming just about any arm produced, it would have made sense to cease production of the less advanced models. The lineage of the pepperbox is clear in the cylinder design, grip design, standard-style trigger, and patented bar hammer double-action design. This may represent a simple design evolution, as the double-action pepperbox 'pocket pistols' were very popular. Allen may have been counting on visual and functional design similarity to help sell these revolvers. The design may also have been intended to avoid patent issues. By incorporating his unchallenged 1845 patent for the bar-hammer double-action mechanism, Allen may have wished to avoid any patent infringement problems from Colt for his own revolving mechanism if the revolver was produced before the expiry of the Colt patent in 1857. Considering all of the evidence that Allen was a thoughtful and frugal businessman, it may simply demonstrate that using common parts was less expensive than designing new ones. The finish was blued, with wood grips as standard, though ivory could be had for an extra cost. The Allen bar-hammer is quite advanced in that pulling the trigger advances the cylinder, cocks the hammer, and drops the hammer, firing the weapon. The cylinder can be removed for cleaning by removing the cylinder pin. A separate ramrod would be needed for loading. The cylinder would likely be removed for loading, so reloading under duress is not practical. The author finds these revolvers aesthetically pleasing and very practical for a pocket pistol. This style was manufactured and sold in three different sizes.
Small frame Bar-Hammer revolver The small frame is a five-shot, .28 caliber revolver, though some .30 caliber models are known. The barrel is 2.5 inches long. The cylinder is engraved with a scene of forest animals identical to the 'pocket-size' side-hammer percussion revolver. As with many models, changes were made during production, and collectors note an 'early' and 'late' variation.
Mid frame Bar-Hammer revolver The mid-frame is a five-shot, .32 caliber revolver. The barrel is approximately 3 inches long. The cylinder is engraved with a scene of forest animals identical to the 'belt-size' side-hammer percussion revolver, and a few examples have the frame surface finely engraved as well. As with many models, changes were made during production, and collectors note an 'early' and 'late' variation.
Large frame Bar-Hammer revolver The large frame is a five-shot, .34 caliber revolver. The barrel is 3.5-4 inches long. The cylinder is engraved with a scene of forest animals identical to the 'belt-size' side-hammer percussion revolver, and a few examples have the frame surface finely engraved as well. As with many models, changes were made during production, and collectors note an 'early' and 'late' variation.
Side-Hammer percussion revolver The author has found the side-hammer models to be the most interesting of all of the Allen revolvers. Allen's design was clearly influenced by Colt's 1855 'Root' revolver, adopting the top strap above the cylinder for strength, rigidity and thus accuracy, and the side-hammer rather than the center hammer more usual on the Colt models 1847, 1848, 1849 and 1851. Another 'borrowed' feature was that the cylinder pin unscrewed from the rear, which the author finds far superior to the various methods of removing to the fore of the pistol. Though influenced by this near contemporary, Allen attempted to build the 'better mousetrap' by incorporating several unique and patented design features. One change was to retain the standard trigger used in the bar-hammer revolvers rather than Root's spur trigger. One new feature is the combination trigger guard/loading lever. Unlike Colts, Remingtons, and other percussion revolvers that aligned a lever to load the cylinders under the barrel, Allen designed his revolvers to incorporate the trigger guard for this function. A catch is tripped, and the trigger guard and attached arm swing down to push a rammer into the bottom cylinder, thus seating the ball fully into the chamber. This reduced the number of parts and likely cost of manufacture. This patented, unique feature carried on into the later center-hammer percussion models. There were four distinct cylinders, varying in the machining. All models are single-action. The finish was blued, with wood grips as standard. Ivory or silver grips could be had for an additional cost. Though manufactured in much smaller numbers than the Colts, Remingtons, Starr, and other revolvers of the Civil War, Allen and Wheelock revolvers are clearly visible in many pictures of the era. The dates of manufacture are uncertain, possibly beginning as early as the expiry of the Colt patent in 1857. This is supported by a patent granted to Allen in January 1857 covering the loading lever as described. As frugal as Allen was, it is unlikely that production would have ended before the consumption of all parts, even though the new center-hammer percussions were also being produced. It is unlikely that production survived the end of the Wheelock era (c 1864).
Navy model Side-hammer revolver The Navy model is a six-shot, .36 caliber weapon. The cylinder is engraved with a scene of forest animals. The Navy model used the first and fourth cylinder type, which is inches long. Barrels were available in six- and eight-inch lengths. Although there are many small variations, there are no essential design changes. There are no known government contracts, though the Army Ordnance Department did purchase 338 on the open market.
Belt model Side-hammer revolver The Belt model is a five-shot, .32-caliber weapon. As the patent shows a five-shot pistol, the belt model likely was the first produced. There are some examples in .31 and .34 caliber. The cylinder is engraved with a scene of forest animals. Standard barrel lengths included 4, 5, 6 and inch. The Belt model used the second, third, and fourth cylinder type, which was inches long. Three different model variations are generally accepted.
Pocket model Side-hammer revolver The Pocket model is a five-shot, .28 caliber weapon. The cylinder is engraved with a scene of forest animals. The pocket model only used the fourth cylinder type, which was 1 9/16 inches long. The standard barrel length is four inches. Three different model variations are generally accepted by collectors.
Center-Hammer percussion revolver The center-hammer percussion models bear a striking resemblance to the larger lipfire revolvers. All were single-action. Ethan Allen showed much evidence of being astute and frugal, and the design likely evolved as a way to share between a percussion series and the new lipfire weapons. Why would Allen make percussion arms at all when the more advanced cartridge revolvers were available? The oft-referenced patent lawsuit may have caused Allen to 'hedge his bets' in case he lost and would have to cease production of cartridge revolvers (as happened in 1863). It may be that cartridge firearms were a new and uncertain technology. A conservative market, as epitomized by the US Army Ordnance Department, was buying the established technology percussion weapons by the thousand. Even Smith and Wesson failed to obtain a government contract during the war for their cartridge revolvers. In any event, the center-hammer percussion revolvers were likely seen as a replacement for the side-hammer and possibly bar-hammer revolvers in production. As with many Allen arms, the start date of manufacture is uncertain. With patent dates including 1857, 1858, 1860, and 1861, many have posited that this revolver was not made until after the settlement of the patent lawsuit in 1863. However, records indicate that the US Ordnance Department purchased about 200 from a Boston merchant in December 1861. Perhaps 1860 or early 1861 is accurate. Advertised and marketed to the military, the center-hammer was designed to be stronger and more rugged than the side-hammer revolver. In addition to the stronger frame, the cylinder pin access was moved to the front of the cylinder. The center-hammer revolvers retained the innovative combination trigger guard/loading lever of the side-hammer models.
Navy model revolver The Navy model is a six-shot, .36 caliber percussion weapon with a standard 5-, 6-, or -inch barrel. Collectors recognize an early and a late production variant. The detailed design of variations suggests that the Navy followed the Army by some margin of time. The finish would be blued, with standard wood grips. Production likely continued until the end of Allen's life. Approximately 500 are thought to have been made. Only a few examples are known that have been converted to cartridges.
Army model revolver The Army model is a six-shot, .44 caliber percussion weapon with a standard -inch barrel. Collectors recognize an early and a late production variant. The finish would be blued, with standard wood grips. Production likely continued until the end of Allen's life. Approximately 750 are thought to have been made. Only a few examples are known that have been converted to cartridges. A fine 'custom' nickel Army with extensive engraving by Gustav Young and hand-carved ivory grips is thought to have been the personal weapon of Ethan Allen. This model is larger and heavier than the contemporary Colt Model 1860 Army.
Providence Police model revolver This model is an anomaly that has bedeviled collectors for years. It is unmarked but has some distinctive design features patented by Allen. It is a five-shot .36 caliber weapon with samples including 3-, 4-, and 5-inch barrels. It is a bit of a throwback, without a loading lever and sporting a spur trigger. Known examples had a blue finish and wood grips. There are records indicating purchase by the
Providence, Rhode Island, police department, hence the name commonly attributed to this model. It is possible that this was a specific contract, and the model was never marketed to the public. This may indicate production very late into the E Allen and Company era, shortly before Allen's death. His sons-in-law Forehand and Wadsworth may have deemed an obsolescent percussion pistol unworthy of bringing into the inventory of the company now sporting their names, and discontinued the model after that initial run. ==Cartridge pistols==