The baseplate is held in position by flanges which are bent over from the sides, similar to the Ortgies magazine.įigure 2: Method of barrel fixation, Deutsches Reichspatent 332281įritz Mann’s patents for the Model 1920/21: Visual check of the number of cartridges. The magazine has four holes drilled on each side which allow a Logical consequence of the desire to keep the gun slim. This is not a very comfortable position but a The magazine holds 5 rounds and the release button is at the front of the frame. So by pushing that bar the operator could easily check if there is a cartridge in the chamber. No cartridge in the chamber this bar can be pushed inside otherwise it is blocked and does not move. It is a spring-loaded vertical bar of metal which stands out from the frame. The Model 1920 has an additional loadedĬhamber indicator on the right side of the gun.
MODEL 1920 ORTGIES PISTOL MANUAL
The manual safety is in the ‘Fire’ position, the pin can be felt to verify that the chamber is loaded. If the manual safety is in the ‘Safe’ position the pin protrudes behind it and makes it more difficult to move to the ‘Fire’ position. With a cartridge in the chamber, a pin on the exterior of the ejector, protrudes through theįrame. The Mann pistols Model 1920 and Model 1921 have a loaded chamber indicator on the left side of the gun. There is no disconnector on the Mann pistol Waffenschmied journal in 1920 there is no other proof of the existence of such a barrel-no reference sample is known.įritz Mann’s safety only disengages the trigger bar-there was insufficient space in his design for a safety that would lock the firing pin. Peter Dannecker reports that a 150mm barrel was available for target shooting. A 4 mm caliber barrel for indoor training ammunition was available. It made it very easy to disassemble the barrel for cleaning purposes. The barrel retention method was very innovative (see figure 2). Mann pistol with severe damage due to a cartridge case having ruptured at the groove. Despite the beveling, in his DWJ article Benedikt Rieger reports on a The groove is about 3 mm wide and 0.1 mm deep, and is beveled so there are no sharp edges. He also claimed a Mann pistol fired several But somehow it worked and Fritz Mann was able to reduce the weight of the breech block by half. – all influences which could not be controlled by the gun manufacturer. However there are a lot of variables which can affect the mechanism, including tolerances and roughness of the chamber, fouling, thickness and material of the case, and pressure fluctuations due to different loads The recoil spring is located above the barrel. Instead, the breech block, or bolt, screws into the knob at the rear of the gun, as does the recoil spring guide rod. This groove allowed for the elimination of a heavy slide Here the pressure of the discharged cartridge, for a short moment, forces the brass of the cartridge case toįlow into the groove and thereby delays the opening of the breech. Fritz Mann chose a circularĬhamber groove. To use a mechanical breech locking mechanism, you must slow the extraction of the empty case to control the point in time when the gun opens. 25 ACP Mann Pistol? It is simple physics that you need a certain mass of breech block in a blow-back operated gun. However, by the late 1930s the Manns were focused on other things besides their gun and machinery business, and in 1938 the company was liquidated. Machinery: ski bindings, buzz saws, two-stroke engines, and crash-helmets. The Mann family, the brothers Fritz and Otto Mann and one of Fritz’s sons Willi, were talented inventors and dealt not only with guns but also with other Later, in 1925, the company operated under the name of Fritz Mann Maschinenfabrik Suhl The Fritz Mann Feinmaschinen – Waffen – und Werkzeugfabrik (Machinery, Guns and Tools Factory) was founded 1896 in Suhlerneundorf, Thuringia. So Fritz Mann had to innovate, but let us start at the beginning. Slide which is necessary to keep the gun closed when firing. But unfortunately a blow-back operated gun is limited by the weight of the breech block or What could an inventor do to find a niche for his new product? TheĪnswer was simple: make the gun lighter and smaller than its competitors. In the 1920s the worldwide gun market was saturated with small, lightweight vest pocket pistols. Figure 1: Fritz Mann (see: Peter Dannecker, Technikgeschichte der Firma Fritz Mann)
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