Jednočinná spoušť

This is a kind of trigger and the striking train short arms. Sometimes it is also often called the "jednofunčkní" trigger. Both names (jednočinná or jednofunčkní) refer to the fact that the press will only to a single activity (has only one feature), and that the release of the striking train, which ensure the launch of the hub. Drum gear must be before the shot is stretched over independently, handling with a tap or conclusion.

Historically this is the oldest type of trigger and the striking train, the first time it was used on revolvers Colt in 1836.

The advantage of this trigger system is a very short operation of the shutter button with low resistance, which is very convenient when accurate aimed fire.

The disadvantage with a revolver then a necessity before each shot manually cocking mechanism tighten, which reduces the rate of fire.

With autoloading pistols it is then necessary to address the emergency weapons and its security when wearing, since after insertion of the hub into the barrel will remain the percussion mechanism in a cocked position and is, therefore, a very dangerous weapon as follows wear.

The solution is to either change the hub into the barrel until just before the shooting (resulting in the fight reduces the rate of reaction, and you need both hands), or deletion of the striking mechanism back to front (resting) position (which again means before shooting the percussion mechanism tension), or secure it in taut position by some kind of fuse (which, however, again requires before the first shot manipulation with the mechanism of the guns).

Today, this type of shutter is considered least favourable as in revolvers, so a pistol. In revolvers to modern structures occurs either for large revolvers on the extremely powerful bullets, where due to the massive kickback as well rapid fire is unlikely to occur, or with the little ones defensive revolvers, where this solution allows for the construction without the large trigger guard of the trigger.

The gun is used either for sporting specials, where no long-term carrying of loaded weapons is not expected, or for a number of pistols 1911, which is despite the age still nejvyrábější type of gun in the world. This type of shutter has the same characteristic of running and thanks to the small resistance and the short step allows for very fast shooting.

Source:
And. E. Hartink: Encyclopedia of pistols and revolvers, publ. Rebo productions, s. r. o., Prague 1997, ISBN 80-85815-66-4
F. Novotny, And. The Kremlin, M. Helebrant: Weapons and self-defense, nakl. Goldstein & Goldstein, Prague 1997, ISBN 80-86094-23-5
Zdeněk Factor: Weapons for self-defense, nakl. Magnet-Press, Prague 1995, ISBN 80-85434-76-8

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