| 释义 |
reˈciprocating, ppl. a.
[f. reciprocate v.]
†1. Back-flowing. Obs. rare—1.
1632Lithgow Trav. iii. 99 Those that got to land, were pulled backe by the reciprocating waues.
2. a. Moving backwards and forwards; characterized by alternation in movement or action.
1697Dryden Virg. Georg. iv. 249 One brawny Smith the puffing Bellows plyes; And draws, and blows reciprocating Air. 1759B. Martin Nat. Hist. Eng. I. 26 From Waters gathered in the subterraneous Basons in this Hill, proceeds this wonderful reciprocating Fountain. a1766S. Chandler Life David II. ii. 9 marg., The reciprocating motion of the buckets of a well, one descending as the other rises, and vice versa. 1830Kater & Lardner Mech. xviii. 247 Reciprocating circular motion is seen in the pendulum of a clock. 1892Pall Mall G. 2 Mar. 3/2 This tool is provided with a reciprocating plunger, located and moving within..two coils of insulated copper wire.
b. Mech. Of machines, etc.: Having a reciprocating part or parts. Applied spec. to engines in which the working fluid drives an oscillating piston.
1822J. Robison Syst. Mech. Philos. II. 577 When water is to be driven along a main by the strokes of a reciprocating engine, it should be forced into an air-box. 1825J. Nicholson Operat. Mechanic 441 Reciprocating saw-mills, for cutting timber,..do not exhibit much variety in their construction. 1843Holtzapffel Turning II. 739 Rectilinear, or reciprocating, saw machines. 1873J. Richards Wood-working Factories 153 For the lighter class of work..the reciprocating machine is best. 1901Trans. Inst. Engineers & Shipbuilders in Scotland XLV. i. 25 An ordinary reciprocating engine performs one complete cycle of operations..in two strokes of the piston. 1911Encycl. Brit. XXV. 824/1 The rapid development of the marine steam turbine makes it probable that it will displace the reciprocating engine in all large and fast ships. 1948Daily Tel. 9 Apr. 4/4 The aircraft developed in recent years in America were..of conventional design. Their engines were reciprocating engines, and they were designed to fly at normal speeds. 1973Times 13 Dec. 35/2 The Wankel still relies on petrol and unfortunately uses rather more of it than a comparable reciprocating engine.
3. That reciprocate(s), in other senses of the vb.
1827R. Craig in Mem. (1862) 93 A false religion cannot exist without its [Despotism's] reciprocating support. 1858W. Arnot Laws fr. Heaven for Life on Earth Ser. ii. xxiii. 193 Sellers and buyers alike would be ashamed..to begin, in this form, the reciprocating series of deceit. 1864Bowen Logic iv. 93 Reciprocating, Convertible or Coextensive Concepts are those which have precisely the same Extension. |