tappetn.

Brit.

/ˈtapɪt/, U.S.

/ˈtæpət/

Forms: Also 1700s–1800s tapit, 1800s tapet, tappit, tabbot.

Etymology: apparently < tap v.² + -et suffix¹; but the use of the suffix is abnormal. Compare modern French tapette a flat piece of wood for driving in corks.

A projecting arm or part in a machine, which by the movement of the latter comes intermittently into contact with another part, so as to give or receive motion.

ΘΚΠ

society > occupation and work > equipment > machine > parts of machines > other parts > [noun] > tappet

tapon1640

tappet1745

wiper1796

wipe1884

1745 Kay & Stell Specif. Patent 612 There are likewise fixed in the sliding beam or hollow rowler, at proper distances, sundry tapits.

1824 ‘R. Stuart’ Descr. Hist. Steam Engine 114 The pins or tappets [are] fixed on the plug~frame (or tappet rod)..: at the ascent or descent of these pins, they strike on the ends of the levers or spanners..connected with the valves,..and open or shut them.

1831 J. Holland Treat. Manuf. Metal I. 241 As the wheel shaft revolves, the tappits successively strike the hammer tail.

1839 A. Ure Dict. Arts 1287 T is the shaft of the eccentric tappets, cams, or wipers, which press the treddle levers alternately up and down.

1870 J. M. Nutter in Eng. Mech. 4 Mar. 610/2 Much depends upon the description of loom and make of tabbots in treading motion.

1907 Westm. Gaz. 28 Nov. 4/1 The inclined valves and new valve tappets..mark it [a motor car engine] with a distinctiveness all its own.

Compounds

attributive and in other combinations; appositive, ‘that is a tappet’, as tappet-arm, tappet-lever, tappet-pin, tappet-plate; ‘of a tappet or tappets’, as tappet action, tappet-bevel, tappet-bowl, tappet motion; ‘having or worked by a tappet or tappets’, as tappet-port, tappet-rod, tappet-valve, tappet-wheel.

ΚΠ

1824*Tappet rod [see main sense].

1837 H. Stansfeld in Civil Engineer & Archit. Jrnl. 1 54/2 Certain Machinery of a Tappet and Lever Action.

1839 A. Ure Dict. Arts 1287 Heddle leaves, actuated by the tappet wheels upon the axis Q.

1895 Model Steam Engine 46 Simply altering the position of the tappet lever by means of two screws.

1908 Westm. Gaz. 28 Apr. 4/2 The valve-stems may be lengthened or the tappet-ports enlarged.

This entry has not yet been fully updated (first published 1910; most recently modified version published online March 2022).

单词	tappet
释义	tappetn. Brit. /ˈtapɪt/, U.S. /ˈtæpət/ Forms: Also 1700s–1800s tapit, 1800s tapet, tappit, tabbot. Etymology: apparently < tap v.² + -et suffix¹; but the use of the suffix is abnormal. Compare modern French tapette a flat piece of wood for driving in corks. A projecting arm or part in a machine, which by the movement of the latter comes intermittently into contact with another part, so as to give or receive motion. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > other parts > [noun] > tappet tapon1640 tappet1745 wiper1796 wipe1884 1745 Kay & Stell Specif. Patent 612 There are likewise fixed in the sliding beam or hollow rowler, at proper distances, sundry tapits. 1824 ‘R. Stuart’ Descr. Hist. Steam Engine 114 The pins or tappets [are] fixed on the plug~frame (or tappet rod)..: at the ascent or descent of these pins, they strike on the ends of the levers or spanners..connected with the valves,..and open or shut them. 1831 J. Holland Treat. Manuf. Metal I. 241 As the wheel shaft revolves, the tappits successively strike the hammer tail. 1839 A. Ure Dict. Arts 1287 T is the shaft of the eccentric tappets, cams, or wipers, which press the treddle levers alternately up and down. 1870 J. M. Nutter in Eng. Mech. 4 Mar. 610/2 Much depends upon the description of loom and make of tabbots in treading motion. 1907 Westm. Gaz. 28 Nov. 4/1 The inclined valves and new valve tappets..mark it [a motor car engine] with a distinctiveness all its own. Compounds attributive and in other combinations; appositive, ‘that is a tappet’, as tappet-arm, tappet-lever, tappet-pin, tappet-plate; ‘of a tappet or tappets’, as tappet action, tappet-bevel, tappet-bowl, tappet motion; ‘having or worked by a tappet or tappets’, as tappet-port, tappet-rod, tappet-valve, tappet-wheel. ΚΠ 1824Tappet rod [see main sense]. 1837 H. Stansfeld in Civil Engineer & Archit. Jrnl.* 1 54/2 Certain Machinery of a Tappet and Lever Action. 1839 A. Ure Dict. Arts 1287 Heddle leaves, actuated by the tappet wheels upon the axis Q. 1895 Model Steam Engine 46 Simply altering the position of the tappet lever by means of two screws. 1908 Westm. Gaz. 28 Apr. 4/2 The valve-stems may be lengthened or the tappet-ports enlarged. This entry has not yet been fully updated (first published 1910; most recently modified version published online March 2022). < n.1745
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