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Mechanical Movement 5

Tham khảo tài liệu 'mechanical movement 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 76 312 Mechanical Movements 306. Three-legged pendulum escapement raises one of the weighted pallets out of the The pallets are formed in an opening in a wheel at each vibration. When the pcndu-plate attached to the pendulum and the lum returns the pallet falls with it and the three teeth of the escape-wheel operate on weight of the pallet gives the impulse the upper and lower pallets alternately i One tooth is shown in operation on the 1 upper pallet. 310. Three-legged gravity escapement. The lifting of the pallets A and B is done by the three pins near the center of the 307. A modification ot the above with escape-wheel the pallets vibrating from two long stopping teeth D and E. arc the pallets. A and B centers near the point of suspension of the pendulum. The escape-wheel is locked by means of stops D and E on the pallets. 308. A detached pendulum escapement leaving the pendulum p free or detached 3IE Double three-legged gravity escape-from the escape-wheel except at the time of ị ment Two locking-wheels A B c and receiving the impulse and unlocking the Ị are here USed with one set of liftingwheel. There is but one pallet I which I pjns between them. The two wheels are receives impulse only during the vibrations j set wide enough apart to allow the pallets of the pendulum to the left. . The lever Q to lie between them. The teeth of the first-locks the escape-wheel until just before thej mentioned locking-wheel are stopped by a Stop-tooth D on one pallet and those OÍ the other one by a Stop-tooth E on the other pallet. time for giving the impulse when it is un- locked by the click c attached to the pen- dulum. As the pendulum returns to the right the click which oscillates on a pivot will be pushed aside by the lever. i 312. Bloxam s gravity escapement. The i pallets are lifted alternately by the small 309. Mudge s gravity escapement. The wheel and the stopping is done by the ac-pallets A B instead of being on one arbor tion of the stops A and B on the larger .