| 单词 | ratchet wheel |
| 例句 | It failed, as the others had done, because they required ratchet wheels, pulleys, &c. The Sea: Its Stirring Story of Adventure, Peril, & Heroism. Volume 2 2012-04-03T02:00:36.237Z The self-acting feed for the drill spindle is actuated by an eccentric on that spindle operating an arm, having a pawl engaging with the ratchet wheel on the lower end of the vertical feed spindle. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The running board was rotten and full of holes; the brake at the north end of the car would not hold on account of having a loose ratchet wheel. Railroad Accidents Their Cause and Prevention 2012-02-02T03:04:35.040Z The first impulse sent out is a long impulse and pulls up both armatures, thereby causing the pawls above and below the small ratchet wheel, shown in Fig. Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, etc. etc. A spring catch kept the ratchet wheel in place at the end of each forward rotation of the wheel by the pawl. The Invention of the Sewing Machine Electrically driven dials usually consist of a ratchet wheel driven by an electrically moved pall. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" The L lever carries a pawl which operates a ratchet wheel, placed on the handle end of the slide rest cross feed screw. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The ratchet wheel and pawl shown in fig. Gas and Oil Engines, Simply Explained An Elementary Instruction Book for Amateurs and Engine Attendants The pawl connected to the slow-acting magnet merely serves to prevent the ratchet wheel from turning back. Cyclopedia of Telephony and Telegraphy, Vol. 2 A General Reference Work on Telephony, etc. etc. On the pendulum he had a little ratchet wheel, R, having thirty teeth. Scientific American Supplement, No. 664, September 22,1888 Care has to be taken that the pushes of the pall do not cause the ratchet wheel to be impelled too far. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" A lever is used to operate the pinion, being inserted in a hub fast upon the same spindle that carries the pinion and the ratchet wheel. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z A tool to hold a drill, having a reversible ratchet wheel. Practical Mechanics for Boys We think a ratchet wheel should not be employed with equidistant pallets. An Analysis of the Lever Escapement On the side of the clock case was a contact maker, which closed the circuit by the pin on the ratchet wheel, R, once every minute. Scientific American Supplement, No. 664, September 22,1888 People say the initiative and the referendum, against which I have talked, are like a ratchet wheel. Ethics in Service The depth of feed is regulated by a patent detent lever which engages with the teeth of a ratchet wheel, till released therefrom by contact with the adjustable stop. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z The diagram will make clear how these vibrating tables are worked by means of ratchet wheels. Cocoa and Chocolate Their History from Plantation to Consumer SB is the primitive radius of the club tooth wheel, but both primitive and real radius of the ratchet wheel. An Analysis of the Lever Escapement There was a moment’s silence, then a sudden clicking of a ratchet wheel, and Allison began to rise rapidly towards the ceiling. The Jester of St. Timothy's The ratchet wheel is stepped around automatically by each impulse of current from an ordinary pole changer such as is employed in ringing biased bells. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. In one piece with the worm-wheel is a ratchet wheel l, and at m is a handle with a pawl that may be engaged with or disengaged from ratchet-wheel l. Modern Machine-Shop Practice, Volumes I and II 2012-03-23T02:00:33.140Z He could not himself stoop; or, if he did, he could only sit erect again after the method of a ratchet wheel. Sheila of Big Wreck Cove A Story of Cape Cod It is self-evident that a narrow pallet requires a wide tooth, and a wide pallet a narrow or thin tooth wheel; in the ratchet wheel we have a metal point passing over a jeweled plane. An Analysis of the Lever Escapement He withdrew his head, and presently the ratchet wheel clicked and slowly, very slowly, Allison began to descend. The Jester of St. Timothy's Another impulse will move all of the ratchet wheels another step, and so on throughout any desired number of impulses. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. Every ferry passenger is familiar with the rapid tinkling of the ratchet wheel that warps the landing stage up to the level of the boat's deck. Mince Pie 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. Edison, His Life and Inventions Behind local dials are electromagnets which, by means of an armature working a frame and ratchet wheel, move the hands forward every minute or half-minute as the current is sent from the standard clock. The Story of Electricity The third cause which catches hold, like a ratchet wheel in machinery, from time to time producing a complete standstill, is the greater strength of the defensive form. On War — Volume 1 The ratchet wheels, therefore, are all stepped in unison. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. |
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