| 释义 |
ˈpull-ˌdown
[f. phr. to pull down, pull v. 25.]
1. The act of pulling down, or fact of being pulled down. Also fig. and attrib.
1588R. Browne New Years Guift (1903) 34 Yet all theis were the pulldowne of Antichrist. a1591H. Smith Serm. 1 Pet. v. 5 ⁋5 Though he have many heart-breaks and pul-downs, and many times no countenance to shew it. 1938N. Streatfeild Circus is Coming viii. 129 Can't we see the pull-down? Hans says it's more exciting than the build-up. 1962Which? Oct. 305/2 New exercises..were added... Pull downs (pulling down a bar attached to pulleys and weights). 1965M. Stewart Airs above Ground iv. 58 If this is the last performance, they'll start the pull-down [of the big top] the minute it's over. 1975Bram & Downs Manuf. Technol. vii. 204 (heading) Pull⁓down Broaching. Ibid. 205 An advantage of the pull⁓down method is that where the cutting pressure is evenly distributed around the axis of movement clamping need not be necessary.
2. a. In the organ, A wire which pulls down a pallet or valve when the key is depressed, thus admitting wind to the pipe.
1852Seidel Organ 50 The lower part..lying outside the great sound-board, is called the pull-down. 1876J. Hiles Catech. Organ v. (1878) 39 The pull-down [is] a small piece of wire connected with the tracker by another hook; and which by pulling the pallet down, or open, admits the wind to the pipes. 1881C. A. Edwards Organs 49 Holes made..to accurately fit the pull-down wires.
b. Cinematogr. (See quot. 1959.)
1953[see ghost-image s.v. ghost n. 14 e]. 1959W. S. Sharps Dict. Cinematogr. 121/2 Pull down, the intermittent mechanism used to move film in a camera, projector or printer by engaging the film perforations. |