Pawl

(noun.) a hinged catch that fits into a notch of a ratchet to move a wheel forward or prevent it from moving backward.

比利校对

• One was used in connection with the propelling lever, which was provided with a pawl to fit into the teeth of the reversed ratchet wheel on its forward movement. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• It printed upon a sheet of paper supported on a roller, carried in a sliding frame worked by a ratchet and pawl. Edward W. Byrn. 十九世纪发明进展.
• The paper feed is shown at the end of the press-lever, and consists of a push dog, or pawl, which operates to urge the paper forward as the press-lever descends. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• After loading the pawls are tripped, and the greater gravity of the counterweight raises the gun to firing position again. Edward W. Byrn. 十九世纪发明进展.
• Finger pawls, working into ratchets at the ends of the roller, serve to rotate it after each line is printed. Edward W. Byrn. 十九世纪发明进展.

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