| 摘要 |
A revolver-type of firearm includes a frame having a cylinder recess, a barrel located at the forward end of the frame, a crane pivotally connected to the frame and a cylinder rotatably mounted on the crane and normally received in the cylinder recess. A spring-biased extractor is slidably mounted in the cylinder and includes a cartridge rim-engaging member and a ratchet located at the rear end of the cylinder. A spring-biased detent element positioned in the frame cooperates with a detent recess in the center of the ratchet to resiliently hold the rear end of the cylinder in position relative to the frame. A hand operated by the hammer acts upon the ratchet to rotate the cylinder to bring succeeding cylinder chambers into alignment with the barrel each time the hammer is moved from a fired to a cocked position and the spring-biased ball yields, if necessary, to allow a slight lateral movement of the cylinder to accommodate any mechanical mismatch or interference between the hand and the ratchet. A thumb operated latch on the crane releasably locks the crane to the frame.
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