| 单词 |
plummer-block |
| 释义 |
plummer-block Mech.|ˈplʌməblɒk|
Also 9 plomer-, plumber-.
[Second element block n. 6; first uncertain. No evidence of any connexion with plumber n. ? From a personal surname.]
A metal box or case for supporting a revolving shaft or journal, having a movable cover secured by bolts, so as to admit of the bearings being tightened when required; = pillow-block (pillow n. 6).
1814R. Buchanan Ess. Millwork (1823) 547 Hence the term pillow block, and sometimes, corruptly, Plumber Block. In Manchester they are called Pedestals. 1825J. Nicholson Operat. Mechanic 373 This trough is firmly fixed by means of a plumber block..which has the top coupling screwed down fast, and the trough is supported at the other end by means of a cylindrical pin, which works in a hole in the cap. 1839R. S. Robinson Naut. Steam Eng. 91 The plomer blocks are sockets, in which all the shafts or axes, used in the engine, revolve. 1875J. W. Benson Time & Time-Tellers (1902) 126 By means of a contrivance, known to engineers as plumber blocks, any part of the mechanism may be removed without disturbing the remainder. 1894Daily News 28 July 6/4 In connection with the gigantic wheel at the exhibition at Earl's Court..the axle of the wheel was hoisted to its position on the plummer blocks on top of the towers. |
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