| 摘要 |
A firearm has a hammer and a trigger. The trigger abuts the lower end of a safety, and one or more springs urge the hammer down and constantly bias the safety towards a safe range. The upper part of the safety has a gap, and a sear is mounted coaxially with the safety in alignment with the gap. When the hammer is down, a nose on the hammer extends into the gap while lugs on the hammer engage abutment surfaces of the safety and prevent the latter from moving to its safe range. Partial cocking of the hammer causes the lugs to release the safety which is thereupon urged into such range. In the safe range, shoulders on the safety located opposite the abutment surfaces can engage the lugs to hold the hammer in a half-cocked position with the hammer nose contacting the sear. Further cocking of the hammer causes the lugs to become disengaged from the shoulders and the nose to release the sear. The safety remains in its safe range while the sear is moved underneath the nose of the hammer to hold it in a fully cocked position. If the trigger is pulled, it forces the safety out of its safe range and the safety, in turn, moves the sear out of engagement with the hammer.
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