| 单词 | bridge tree |
| 释义 | > as lemmasbridge tree bridge tree n. (a) the beam supporting the spindle of the upper stone in a grain mill, one end of which may be raised or lowered to adjust the distance between the millstones; †(b) a pivoting crossbar to which the traces (trace n.2 1) are fastened in a draught plough, carriage, etc.; = swingletree n. 2 (obsolete rare). ΘΚΠ the world > food and drink > food > food manufacture and preparation > preparation of grain > milling or grinding > [noun] > corn-mill > millstone > upper > support bridge treea1300 rind1318 ink1572 society > travel > means of travel > a conveyance > vehicle > cart, carriage, or wagon > parts of cart or carriage > [noun] > swingle-tree swing-tree1396 swingletree1483 spring-tree1600 bridge tree1607 whippin1697 whippletree1733 cross-tree1765 splinter-bar1765 swindle-tree1801 shackle-bar1834 whiffletree1842 heel tree1846 single-tree1847 swingle-bar1849 pulling-tree1895 trace-block1900 a1300 in D. M. Owen Making of King's Lynn (1984) 424 Rogerus..ivit ad aquam iuxta minorem rotam molendini..et vertit ipsum ita quod cecidit super quandam trabem que vocatur briggetre. 1607 G. Markham Cavelarice v. 53 The draught breadthes..extend from the breast of the horse to the bridge tree of the Coach. 1760 J. Ferguson Lect. Select Subj. iv. 83 The perpendicular position of the spindle must be restored by adjusting the bridge-tree. 1795 O. Evans Young Mill-wright & Miller's Guide iv. i. 142 It is absolutely necessary to have a bridge-tree that shall have a degree of elasticity, which gives the stone a tremulous motion up and down. 1954 R. Wailes Eng. Windmill i. 13 If you look up into the ceiling of the breast of the mill you can see two white squares, with a square hole in each, and an iron spindle passing down through each hole and supported on a wooden beam or bridge tree. 2006 C. O. Staples Mills of Southern Afr. ii. 45/1 The bridge tree is used to lift or lower the top or runner millstone to adjust for the fineness of the ground grains. < as lemmas |
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