† puppet-clackn.
Obsolete.
= poppet valve n.
ΘΚΠ
society > occupation and work > equipment > machine > parts of machines > control(s) > [noun] > valve > disk
puppet-clack1744
puppet valve1783
poppet1864
1744 J. T. Desaguliers Course Exper. Philos. II. 472 If the Steam is stronger than you want, it may lift up the Valve, and go out. This is commonly call'd the Puppet Clack.
1796 G. Gregory Econ. Nature II. vii. i. 439 When the steam is found to be of sufficient strength by the puppet-clack, then by thrusting back the spanner..the steam is admitted into the cylinder.
1829 ‘R. Stuart’ Anecd. Steam Engines I. 188 The return of the water is prevented by the usual means of a puppet-clack, or valve.
1844 Civil Engineer & Architect's Jrnl. 7 275/2 Stop the engine, open the puppet clack, and fill the boiler.
1881 R. L. Galloway Steam Engine viii. 98 Desaguliers informs us that about the year 1717 he communicated to Mr. H. Beighton the use of the steel-yard over the puppet-clack, or safety-valve.
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online June 2018).
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n.1744