| 释义 |
headstock
[f. head n.1 + stock n.]
1. Name applied to the bearings or supports of revolving parts in various machines.
a. The framing which supports the gudgeons of a wheel or axle. b. That part of a lathe which carries the mandrel or live stock. c. The framework in which the carriage of a spinning-mule runs. d. The head which supports the cutters in a planing machine. e. (pl.) Mining. A frame over a shaft, carrying the pulleys for the hoisting cables; a gallows-frame. f. The stock of a bell. g. The horizontal end members in the under-frame of a railway carriage or truck. h. (See quot.1)
a.1731H. Beighton in Phil. Trans. XXXVII. 6 A quadruple Crank..the Center..is fixed in Brasses at each End in two Head-stocks.
b.1812–16J. Smith Panorama Sc. & Art I. 55 An accommodation of a few inches is obtained by screwing H further through or out of the headstock. 1863Sir W. Fairbairn Mills II. 9 A large headstock, carrying a hollow spindle through which is inserted a mandrill.
c.1851L. D. B. Gordon in Art Jrnl. Illustr. Catal. p. vi**/1 In some Mules the headstock is placed in advance of the roller-beam, towards the middle of its length. 1879Cassell's Techn. Educ. IV. 395/2 Seven..to nine hundred spindles..arranged..upon the ‘carriage’..in one long row, which is interrupted at the middle..by the ‘headstock’.
d.1863Sir W. Fairbairn Mills II. 11 A headstock carrying two cutters, one for roughing, and the other for finishing.
e.1869Eng. Mach. 19 Nov. 238/1 It..was taking the chair and men..over the headstocks. 1882Pall Mall G. 25 Jan. 8/2 The engineman..failed to pull up in time to prevent the ascending empty cage from being wound over the headstocks.
f.1688R. Holme Armoury iii. 461/2 A Bell Azure hanging by its Headstock and Gugions in an Arch. 1881Standard 20 Dec. 2/1 In ordinary peals the bells are swung well upwards, and..every headstock is provided with a stop, to prevent the bell accidentally turning over. 1882Ibid. 20 Mar. 2/4 The bell is secured to the headstock by iron straps passing through its canons and bolted above the stock.
g.1888Lockwood's Dict. Mech. Engin., Headstock. (2) The end timbers in the under frame of a railway truck. 1928Daily Express 29 Dec. 9/4 The interval between headstocks of coaches should be as small..as practicable for necessary freedom of movement.
h.1927T. Woodhouse Artificial Silk 108 Occasionally both reeds are placed on what is termed a dividing head or headstock. Ibid. 112 Fig. 50 illustrates the delivery or headstock end with the weaver's beam partially filled with the sheet of sized and dried threads.
2. Sc. (See quots.)
1834H. Miller Scenes & Leg. (1858) 420 The schoolmaster would call on the boys to divide and choose for themselves ‘Head-stocks’, i.e., leaders, for the yearly cock-fight. 1854― Sch. & Schm. iii. (1857) 50, I contributed in no degree to the success of the head-stock or leader. |