plummer blockn.

Brit.

/ˈplʌmə ˌblɒk/, U.S.

/ˈpləmər ˌblɑk/

Forms: 1700s– plummer block, 1800s plomer block, 1800s– plumber block.

Origin: Apparently formed within English, by compounding. Etymons: an element of uncertain origin, block n.

Etymology: < a first element of uncertain origin (perhaps a surname) + block n.There is no obvious connection with plumber n.

Mechanics.

A cradle for a journal bearing, consisting of a lower part on which sits the shaft or axle in its bearing, and a cap fitting over this, which holds the shaft or axle in place and can be tightened by means of bolts as the surface of the bearing wears away; a pillow block.

ΘΚΠ

society > occupation and work > equipment > machine > parts of machines > shaft > [noun] > parts of > journal > part which encloses or supports

bushel1433

bush1566

plummer block1796

box1825

housing1829

journal-box1864

strap-head1864

1796 J. Robison in E. Robinson & A. E. Musson James Watt & Steam Revol. (1969) 130 A piece of..timber, reaching from the plummer blocks to nine or ten inches beyond the catch pins.

1825 ‘J. Nicholson’ Operative 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.

1839 R. S. Robinson Naut. Steam Engine Explained 91 The plomer blocks are sockets, in which all the shafts or axes, used in the engine, revolve.

1875 J. W. Benson Time & Time-tellers 177 By means of a contrivance, known to engineers as plumber blocks, any part of the mechanism may be removed without disturbing the remainder.

1894 Daily 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.

1955 H. N. Staines Introd. Ball & Roller Bearings (Assoc. Engin. & Shipbuilding Draughtsmen) 30 Simple sheet metal shrouds can be used to protect a standard plummer block pattern bearing when employed in a dirty atmosphere.

1971 B. Scharf Engin. & its Lang. xii Upright or angular plummer blocks are frequently used to support line shafts and other heavy shafts.

1995 World Paper (Nexis) June 36 Liquid-ring vacuum pumps are driven through poly-vee-belt drives, with or without plummer blocks, or by helical gearboxes.

This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).

单词	plummer block
释义	plummer blockn. Brit. /ˈplʌmə ˌblɒk/, U.S. /ˈpləmər ˌblɑk/ Forms: 1700s– plummer block, 1800s plomer block, 1800s– plumber block. Origin: Apparently formed within English, by compounding. Etymons: an element of uncertain origin, block n. Etymology: < a first element of uncertain origin (perhaps a surname) + block n.There is no obvious connection with plumber n. Mechanics. A cradle for a journal bearing, consisting of a lower part on which sits the shaft or axle in its bearing, and a cap fitting over this, which holds the shaft or axle in place and can be tightened by means of bolts as the surface of the bearing wears away; a pillow block. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > shaft > [noun] > parts of > journal > part which encloses or supports bushel1433 bush1566 plummer block1796 box1825 housing1829 journal-box1864 strap-head1864 1796 J. Robison in E. Robinson & A. E. Musson James Watt & Steam Revol. (1969) 130 A piece of..timber, reaching from the plummer blocks to nine or ten inches beyond the catch pins. 1825 ‘J. Nicholson’ Operative 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. 1839 R. S. Robinson Naut. Steam Engine Explained 91 The plomer blocks are sockets, in which all the shafts or axes, used in the engine, revolve. 1875 J. W. Benson Time & Time-tellers 177 By means of a contrivance, known to engineers as plumber blocks, any part of the mechanism may be removed without disturbing the remainder. 1894 Daily 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. 1955 H. N. Staines Introd. Ball & Roller Bearings (Assoc. Engin. & Shipbuilding Draughtsmen) 30 Simple sheet metal shrouds can be used to protect a standard plummer block pattern bearing when employed in a dirty atmosphere. 1971 B. Scharf Engin. & its Lang. xii Upright or angular plummer blocks are frequently used to support line shafts and other heavy shafts. 1995 World Paper (Nexis) June 36 Liquid-ring vacuum pumps are driven through poly-vee-belt drives, with or without plummer blocks, or by helical gearboxes. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.1796
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