valven.1
/valv/, U.S. /vælv/ I. One of a pair of enclosing sections, and related uses.
1. in extended use.?1527 Iudycyall of Vryns i. iii. 8 For to delyuer and purge them oute by that membre, that is to say, by the matryce, and so out by the value, that is to say, by ye gate of hyr body.
a. One or other of the halves or leaves of a double or folding door.
ΘΚΠ
society > inhabiting and dwelling > inhabited place > a building > parts of building > window or door > parts of door > [noun] > leaf of door
valvea1387
leaf1611
impost1730
folding1757
a1387 J. Trevisa tr. R. Higden Polychron. (St. John's Cambr.) (1872) IV. 449 At þe laste þey brende þe valves of þe temple þet were i-heled wit gold.
c1440 Promptorium Parvulorum 508/1 Valwe, valva, vel valve.
1661 T. Blount Glossographia (ed. 2) Valves, folding doors or windows.
1725 E. Fenton in A. Pope et al. tr. Homer Odyssey I. i. 555 The bolt, obedient to the silken cord, To the strong staple's inmost depth restor'd, Secur'd the valves.
1834 W. Beckford Italy; with Sketches Spain & Portugal I. 326 Throwing open the valves, we entered the chapel.
1863 S. Baring-Gould Iceland 280 The outside of the valves [of the triptych] was painted with figures of S. John the Baptist and Moses.
1871 B. Taylor tr. J. W. von Goethe Faust II. iii. 204 Ye valves of yon dark iron portals!
b. A door controlling the flow of water in a sluice.
ΘΚΠ
the world > the earth > water > lake > pool > [noun] > artificially confined water > contrivance for impounding water > gate, lock, or sluice > paddle, slide, or door in
sluice1601
valve1790
paddle1795
1790 Act 33 Geo. III c. 90 §65 If any Person..cause to be opened..any Lock Gate, or any Paddle, Valve, or Clough, belonging to any Lock..on the said Canal.
1847 J. Dwyer Princ. & Pract. Hydraul. Engin. 74 The gate or valve of a sluice is generally made to move by machinery in a vertical position.
2. Conchology. One of the halves of a hinged shell; a single shell of similar form; a single part of a compound shell.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] > Testacea (shelled molluscs) > shelled mollusc > shell
seashella900
shale1561
buckie1596
caracol1622
valve1661
spire1681
umbilicus1688
conch-shell1697
wart-shell?1711
needle1713
multivalve1753
concha1755
periosteum1758
conch1773
devil's claw1773
furbelow1776
peewit's egg1776
worm-tube1776
rosebud1815
sheath1815
periostracum1833
epicuticle1885
epicuticula1886
leg of mutton1891
trivalve1891
1661 R. Lovell Πανζωορυκτολογια, sive Panzoologicomineralogia Isagoge sig. B7v Some are covered on every side, as oisters, cocks, and tellinæ; others have but one valve, the other side sticking to rocks.
1772 Philos. Trans. 1771 (Royal Soc.) 61 232 I separated the valves, and the rising part of the hinge to the edge shewed them to be shells.
1774 O. Goldsmith Hist. Earth VII. 69 These shells take different forms, and are often composed of a different number of valves; sometimes six; sometimes but three.
1828 J. Stark Elements Nat. Hist. II. 80 The hollow valve of this species..was formerly used as a drinking cup.
1828 J. Stark Elements Nat. Hist. II. 80 The lower valve white, and longitudinally sulcated; upper valve rufous.
1841 T. R. Jones Gen. Outl. Animal Kingdom xxii. 384 The elastic ligament for opening the valves is..placed externally instead of within the shell.
3. Entomology.
a. = valvula n. 2.
ΘΚΠ
the world > animals > invertebrates > phylum Arthropoda > class Insecta > parts of insects > [noun] > abdomen > valvula
valve1802
valvula1917
1802 W. Kirby Monogr. Apum Angliæ I. 110 Linneus, in his character of Ichneumon, calls them the valves of the vagina of the aculeus. They are the covers of the genuine vagina.
1919 Ann. Entomol. Soc. Amer. XII. 277 The sternal region of segment nine is shifted.., thus bringing the bases of the dorsal and inner valvulæ into the same transverse plane with those of the ventral valves.
1969 R. F. Chapman Insects xvii. 325 If the insect oviposits in plant or animal tissue the valves are sclerotised and lanceolate.
b. (See quot. 1826.)
ΘΚΠ
the world > animals > invertebrates > phylum Arthropoda > class Insecta > parts of insects > [noun] > abdomen > ovipositor > laminae covering
valve1826
1826 W. Kirby & W. Spence Introd. Entomol. III. xxxiii. 390 Valvæ (the Valves), two lateral laminae, often coriaceous, by which the ovipositor when unemployed is covered.
c. A clasper of a male butterfly.
ΘΚΠ
the world > animals > invertebrates > phylum Arthropoda > class Insecta > Rhopalocera (butterflies) > [noun] > member of (butterfly) > parts of > clasper
valve1864
1864 Trans. Linn. Soc. 25 35 There remain therefore only the characters of the perfect insect, the most important of which are the anal valves in the male. These..are furnished with projecting points or spines..which serve to attach the male more firmly to the female in copulâ.
1883 Trans. Linn. Soc.: Zool. 2 332 C. Eubule has a very curious valve, armed as elaborately, and as singularly, as that of many a Papilio.
1964 R. M. Fox & J. W. Fox Introd. Compar. Entomol. iii. 109 Other orders with periphallic claspers (harpes, harpagones, valves, etc.) form them from the coxae and exite styli of the appendages of at least the ninth segment.
4. Botany.
a. One of the halves or sections of a dehiscent pod, pericarp, or capsule.
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > seed > seed-vessel or pericarp > [noun] > division or section of
loculament1654
lobe1672
valvule1755
valve1760
1760 J. Lee Introd. Bot. i. vi. 13 Siliqua, a Pod, is a Pericarpium of two Valves, wherein the Seeds are fastened along both the Sutures or Joinings of the Valves.
1796 W. Withering Arrangem. Brit. Plants (ed. 3) I. 294 Pod long, cylindrical;..valves 2, opening with a jerk, and the valves rolling back.
1861 R. Bentley Man. Bot. ii. iii. 452 The valves of the fruit opening longitudinally, and bearing transverse septa in their interior.
1870 J. D. Hooker Student's Flora Brit. Islands 235 Capsule globose;..valves septiferous.
b. In various applications (see quots.).
ΚΠ
1785 T. Martyn tr. J.-J. Rousseau Lett. Elements Bot. xiii. 135 The inner [chaff] consisting also of two parts or valves, which you may call petals.
1796 W. Withering Arrangem. Brit. Plants (ed. 3) I. 176 Bloss[om]. 1 petal, funnel-shaped. Tube cylindrical, crooked... Mouth closed by 5 prominent, convex, approaching valves.
1812 S. Edwards New Bot. Garden I. 23 The stamina have six filaments, subulate, inserted into the valves of the nectary.
1832 J. Lindley Introd. Bot. 104 The pieces of which these three classes of bracteæ are composed are called valves or valvulæ by the greater part of botanists.
1832 J. Lindley Introd. Bot. 126 In the most common state of the anther the cells..open with two valves, by a longitudinal fissure from the base to the apex.
1870 J. D. Hooker Student's Flora Brit. Islands 12 Anthers opening by 2 ascending lids or valves.
c. Each of the two siliceous cell walls of a diatom, similar in shape but slightly different in size, with one overlapping the other.
ΘΚΠ
the world > life > biology > substance > cell > parts of cell > [noun] > wall or membranes
septum1720
cell wall1840
valve1852
periplast1853
stroma1872
ghost1879
endoplasmic reticulum1883
plasma membrane1893
plasmalemma1923
unit membrane1958
purple membrane1968
1852 A. Pritchard Hist. Infusorial Animalcules (new ed.) iii. 295 Siliceous valves are deposited exterior to a cell-membrane.
1857 A. Henfrey Elem. Course Bot. §629 The cells [of Diatomaceæ]..enclosed by a membrane..impregnated with silex and separable into valves.
1898 H. C. Porter tr. E. Strasburger et al. Text-bk. Bot. ii. i. 313 Both valves are so strongly impregnated with silica, that, even when subjected to intense heat, they remain as a siliceous skeleton, retaining the original form and markings of the cell walls.
1973 R. G. Krueger et al. Introd. Microbiol. iii. 125/1 The newer valve of any diatom is invariably the smaller valve, because it is constructed within the confines of the older valve.
II. A structure or device that controls flow, and related uses.† 6. A supposed check (similar to above) to the reflux of sap in plants. Obsolete.
5. Anatomy.figurative.1871 R. H. Hutton Ess. (1877) I. 74 Animals.. have, so to say, fewer valves in their moral constitution for the entrance of divine guidance.
a. A membranous fold in an organ or passage of the body (esp. in the heart, arteries, and veins), which automatically closes after the manner of a trapdoor to prevent the reflux of blood or other fluid.
ΘΚΠ
the world > life > the body > vascular system > blood vessel > [noun] > valve of
valve1615
leaflet1826
the world > life > the body > vascular system > heart > [noun] > valve
valve1615
portal1666
tricuspid valve1671
mitral valve1696
mitral1835
1615 H. Crooke Μικροκοσμογραϕια 180 In each of these passages there are Values which hinder the refluence of the choler.
1688 R. Boyle Disquis. Final Causes iv. 157 Our famous Harvey..took notice that the valves in the veins..were so placed that they gave free passage to the blood towards the heart.
1712 tr. H. More Scholia Antidote Atheism 159 in H. More Coll. Philos. Writings (ed. 4) As to the Fabrick of the Valves and Veins of the Heart.
1799 Med. & Physical Jrnl. 2 371 This foramen in the embryo..is closed by a valve which prevents the reflux of the blood.
1830 R. Knox tr. P. A. Béclard Elements Gen. Anat. 208 The valves..close the vein, sustain the blood, and prevent its reflux towards the capillary vessels.
1870 G. Rolleston Forms Animal Life p. xlv The valves, which in other Vertebrata guard the entrance of the great veins into the right auricle.
b. A similar part or structure serving to close a passage for other reasons.
ΘΚΠ
the world > life > biology > physical aspects or shapes > specific areas or structures > [noun] > closure
valvula1615
valvule1755
valvelet1793
valve1803
occlusor1877
1803 W. Bingley Animal Biogr. I. 87 Within each [ear] there is a kind of secondary auricle..so placed as to serve as a valve or guard to the auditory passage.
1813 W. Bingley Animal Biogr. (ed. 4) I. 110 The ears are short, and have each a very small inner valve.
1835–6 Todd's Cycl. Anat. & Physiol. I. 322/1 The pyloric orifice of the gizzard is guarded by a valve in many birds.
1849 A. M. Bell New Elucidation Princ. Speech & Elocution ii. ii. 165 When the Stammerer has brought his valve—the glottis—under due control, he will have but little difficulty.
ΘΚΠ
the world > plants > part of plant > plant substances > [noun] > fluid, juice, or sap > valve controlling reflux of
valve1665
1665 Philos. Trans. (Royal Soc.) 1 30 About the Pores of bodies, and a kind of Valves in wood.
1675 N. Grew Compar. Anat. Trunks ii. i. 46 Which..plainly shews, that in the Sap-vessels of a Plant there are no Valves.
a1704 J. Locke Elem. Nat. Philos. ix, in Coll. Several Pieces (1720) 210 The heat dilating, and the cold contracting those little tubes; supposing there be valves in them, it is easy to be conceiv'd how the circulation is perform'd in Plants.
1808 C. Vancouver Gen. View Agric. Devon xvii. 435 These valves possess a contractile force,..whereby the regress of the moisture is prevented, and of course it is taken up by the tree.
7. figurative.1830 T. P. Thompson in Westm. Rev. July 247 The slightest degree of popular interference which can act as a valve to the great boiler, and prevent the whole from blowing up.1847 T. De Quincey Secret Societies in Tait's Edinb. Mag. Aug. 514/1 There was a valve in reserve, by which your perplexity could escape.1930 W. H. Auden Poems 56 No chattering valves of laughter emphasized..the sessile hush.1933 E. O'Neill Ah, Wilderness! iv. i. 116 Miller (seizes this as an escape valve—turns and fixes his youngest son with a stern forbidding eye).
a. Mechanics. A device of the nature of a flap, lid, plug, etc., applied to a pipe or aperture to control the passage of air, steam, water or the like, usually acting automatically by yielding to pressure in one direction only.Many classes and varieties of valves are in use, and are distinguished by special epithets denoting form or purpose, as ball-, clack-, cone-, disk-, flap-valve; air-, escape-, feed-, injection-valve, etc. See also safety valve n.
ΘΚΠ
society > occupation and work > equipment > machine > parts of machines > control(s) > [noun] > valve
cockc1483
window1576
stopcock1584
register1612
shut1651
valve1659
flap1824
shut-off1869
stop-tap1895
stop-gate1902
1659 J. Leak tr. I. de Caus New Inventions Water-works 13 Of the Value or Suspiral. It will be also necessarie..to demonstrate the manner of the value of Copper which openeth itself by intervals.
1667 Philos. Trans. (Royal Soc.) 2 447 A Square Woodden Bucket..on the ends of which are the moveable bottoms or Valves EE.
1702 T. Savery Miner's Friend 68 Will not these Brass Valves..in your Engine speedily ware out?
1796 S. Vince Princ. Hydrostat. ix. 111 Each sucker has a valve opening upwards.
1839 R. S. Robinson Naut. Steam Engine Explained 11 The pressure shuts the valve in the neck of the air vessel, and opens the valve in the piston.
1889 J. J. Welch Text Bk. Naval Archit. 133 Self-acting or automatic valves are fitted where watertight bulkheads..are pierced for ventilation purposes.
b. Electronics. = thermionic valve at thermionic adj.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electronics > electronic devices or components > thermionic valve > [noun]
tube1859
valve1905
thermionic valve1909
bottle1940
1905 J. A. Fleming in Proc. Royal Soc. 74 478 We have in this vacuum valve and associated mirror galvanometer a means of detecting feeble alternating electric currents or oscillations.
1905 J. A. Fleming in Proc. Royal Soc. 74 479 This arrangement of a differential galvanometer and two valves transforms..more of the alternating oscillation into direct current than when one valve alone is used.
1924 C. R. Gibson & W. B. Cole Wireless of To-day xxiv. 307 Monster valves have now been manufactured absorbing as much as 100 kw. each, and in consequence of the tremendous heat generated, the electrodes are specially constructed permitting water to circulate within for cooling purposes.
1928 Electr. Communication VI. 241/2 The high-power amplifying tubes, which over here [i.e. in Britain] we call ‘valves’.
1943 C. L. Boltz Basic Radio x. 165 All battery-fed radio apparatus utilizes directly-heated valves, which need 2V on the filament.
1968 M. Guybon tr. A. Solzhenitsyn First Circle lxxv. 476 He was a radio engineer by training, and hadn't a box containing two valves been found during the search of his flat?
c. Chess. (See quot. 1930.)
ΘΚΠ
society > leisure > entertainment > pastimes > game > board game > chess > [noun] > move > type of move
neck1557
stroke1735
key1845
forced move1847
key-move1847
fianchetto1848
queening1860
pinning1900
mutate1922
valve1930
zwischenzug1941
1930 A. C. White & G. Hume Valves & Bi-valves 7 In chess problem terminology, the designation of a Valve has been given to any move which simultaneously opens one line while it closes another. In a broad sense, Valves include a large domain with many varied combinations of themes. There is a much narrower application of the term: Valve, and that is the particular case where not only is the move made by Black, but both of the lines affected are also Black.
1936 P. W. Sergeant tr. Znosko-Borovsky Art of Chess Combination ii. v. 62 In the interception of lines one closes lines to the adversary at critical points, while here one opens lines to one's own pieces. The skilled hand deals with the valves on this side and on that.
Compounds
C1.
a. (In sense 7a.)
(a)
valve-board n.
ΚΠ
1869 Eng. Mech. 24 Dec. 352/3 There is a board screwed down on the top of A. That is the valve-board.
1885 C. G. W. Lock Workshop Receipts 4th Ser. 290/2 The valve-boards are next hinged on to the feeder-boards.
valve-box n.
ΚΠ
1797 Encycl. Brit. XVII. 766/2 Above..is the seat of the lower steam valve, opening into the valve box.
1869 Eng. Mech. 3 Dec. 282/2 Take the high pressure valves out of the valve-box.
valve casing n.
ΚΠ
1839 R. S. Robinson Naut. Steam Engine Explained 44 The flange to which is bolted the valve casing.
1887 D. A. Low Introd. Machine Drawing (1892) 74 An elevation of the valve casing with the cover and the valve removed.
valve chest n.
ΚΠ
1839 R. S. Robinson Naut. Steam Engine Explained 62 The blow-through pipe, terminating in a valve chest.
1889 J. J. Welch Text Bk. Naval Archit. xi. 124 In the former, a suction-box or valve chest V is fitted beneath the pump.
valve engine n.
ΚΠ
1797 J. Curr Coal Viewer 44 The plug floor in all the common engines falls 17½ inches below the top of the boiler, and in the valve engine it falls 2 feet 1 inch below.
valve face n.
ΚΠ
1864 Webster's Amer. Dict. Eng. Lang. Valve-face.
1887 D. A. Low Introd. Machine Drawing (1892) 70 The angle which the valve face makes with its axis is generally 45°.
valve-gear n.
ΚΠ
1842 Penny Cycl. XXII. 508/2 To bring the valve-gear within..reach of the engineer.
valve-line n.
ΚΠ
1871 Leisure Hour 8 Apr. 222/2 The balloon had been gyrating, and the valve-line become twisted.
1963 A. Smith Throw out Two Hands viii. 95 Above it [sc. the basket of a balloon]..were the valve line (for gentle release of gas) and the rip line (for a total release of gas).
1969 Gloss. Aeronaut. & Astronaut. Terms (B.S.I.) vii. 8 Valve line, a cord for the operation of a valve.
valve-plug n.
ΚΠ
1836–41 W. T. Brande Man. Chem. (ed. 5) 524 A slender pipe, open at both ends, inserted into the valve-plug.
valve room n.
ΚΠ
1909 Westm. Gaz. 8 Nov. 7/2 A quantity of gas and the under-side of the flooring in the valve-room of the works were destroyed.
valve-seat n.
ΚΠ
1841 Civil Engineer & Architect's Jrnl. 4 379/2 H, the valve-seat.
valve seating n.
ΚΠ
1844 Civil Engineer & Architect's Jrnl. 7 190/2 The next valve was composed of several triangular pieces, opening on leather joints, from the circumference of the valve seating.
valve-spindle n.
ΚΠ
1844 Civil Engineer & Architect's Jrnl. 7 192 It was quite clear the valve-spindle must be of adequate strength.
valve stem n.
ΚΠ
1888 Lockwood's Dict. Mech. Engin. 397 Valve stem, a valve spindle or rod.
1889 J. M. Whitham Steam-engine Design iv. 98 If the valve..is long, the weight, friction, and diameter of the valve~stem are increased.
1970 K. Ball Fiat 600, 600D Autobook i. 13/1 Valve stems, once bent, cannot be straightened satisfactorily.
valve tube n.
ΚΠ
1827 M. Faraday Chem. Manip. xv. 367 Applying the mouth to the lower aperture of the valve tube.
(b)
valve governor n.
ΚΠ
1835 A. Ure Philos. Manuf. 27 Valve governors, shafts, and other geering of mills.
valve lifter n.
ΚΠ
1839 R. S. Robinson Naut. Steam Engine Explained 97 The eccentric rod pulled backwards and forwards by means of the valve lifter.
(c)
valve-like adj.
ΚΠ
1851 S. P. Woodward Man. Mollusca i. 34 The in-coming and out-going currents..are kept apart by a valve-like fringe.
1859 R. H. Semple tr. P. Bretonneau et al. Mem. Diphtheria 296 A valve-like sound or a peculiar hissing noise.
valve-shaped adj.
ΚΠ
1879 St. George's Hosp. Rep. 9 365 Small valve-shaped wound over outer side of fracture.
(d) Also in collocations used attributively.
valve-guide stem n.
ΚΠ
1875 E. H. Knight Amer. Mech. Dict. III. 2476/1 The valve-guide stem has an end knob, by which its falling out is prevented.
valve-rod end n.
ΚΠ
1845 Encycl. Metrop. VIII. 187/1 In this engine the working the valves is effected by eccentrics..below the valve rods.
1861 W. Fairbairn Iron 123 To knock off the point of the trigger from the shoulder on the valve-rod.
1887 D. A. Low Introd. Machine Drawing (1892) 119 Valve-rod end for a marine engine.
(e) Also used to designate brass instruments whose range is increased by the addition of valves.
valve horn n.
ΘΚΠ
society > leisure > the arts > music > musical instrument > wind instrument > brass instruments > [noun] > cornet or cornet à pistons
cornet à piston1836
cornopean1837
cornet1843
valve horn1877
1877Valve horn [see valve trumpet n.].
1938 Oxf. Compan. Music 439/2 The valve horn has the immense advantage of..a chromatic series, for three valves add instantaneously to the air column a length corresponding respectively to a semitone, two semitones, and three semitones.
1959 Listener 4 June 1001/3 The more limpid yet penetrating tone of the narrower-bored French valve-horn.
1977 Early Music 5 221/2 Scores of the valve horn era.
valve trombone n.
ΘΚΠ
society > leisure > the arts > music > musical instrument > wind instrument > brass instruments > [noun] > trombone
posaune1724
trombone1724
busaun1776
valve trombone1883
slush pump1913
slip-horn1923
slide1976
1883 O. Coon Harmony & Instrumentation xxvi. 73 The valve Trombone is often substituted for the one with a slide.
1979 Jazz Jrnl. 32 11/1 (caption) Thad Jones on valve trombone.
valve trombonist n.
ΘΚΠ
society > leisure > the arts > music > musician > instrumentalist > wind player > [noun] > trombone-player
trombone1847
trombonist1891
valve trombonist1946
1946 R. Blesh Shining Trumpets (1949) xii. 263 The valve trombonist Brad Gowans.
valve trumpet n.
ΘΚΠ
society > leisure > the arts > music > musical instrument > wind instrument > brass instruments > [noun] > trumpet > types of
lilting-hornc1384
claranerc1410
clarinec1440
trumpet1440
sordine1591
sordine trumpet1616
clarion1621
alchemy1667
sourdinea1678
jubil-trumpet1715
lituus1776
sea-trumpet1776
penny trumpet1783
salpinx1865
principal1876
valve trumpet1877
tuba1882
kakaki1932
zugtrompete1978
vuvuzela2003
1877 E. Prout Instrumentation v. 81 The valve-trumpet..possesses, like the valve-horn, a complete chromatic scale.
1979 Oxf. Junior Compan. Music 331/4 The trumpet now in everyday orchestral use is the valve trumpet. That is to say, it has extra lengths of tubing coiled alongside its main tube, and these can be brought into action by pressing down a ‘valve’.
b. In sense 7b, esp. designating apparatus employing valves.The number of attributive uses is very great, esp. in recent technical works.
valve circuit n.
ΚΠ
1915 J. C. Hawkhead & H. M. Dowsett Handbk. Wireless Telegraphists (ed. 2) 119 If an E.M.F. be applied to the valve circuit a more sensitive condition is obtained.
1934 Times Rev. 1933 1 Jan. p. ix/4 The Wireless Exhibition at Olympia illustrated the exceptional advances made during the year in valve and valve-circuit technique.
valve detector n.
ΚΠ
1915 J. C. Hawkhead & H. M. Dowsett Handbk. Wireless Telegraphists (ed. 2) 120 The valve detector is used with various circuits.
1926 R. W. Hutchinson First Course Wireless 201 All these are also used in conjunction with a valve detector.
valve heater n.
ΚΠ
1929 Radio Times 8 Nov. 443/3 Get the necessary output from a Regentone mains unit for A.C. valve heaters.
1960 Pract. Wireless 36 326/2 Commence wiring the valve heaters by taking a tightly twisted pair of insulated wires from V1 to V2.
valve-holder n.
ΚΠ
1922 Wireless World 4 Mar. 748/1 The base..carries the valve holder.
1960 Pract. Wireless 36 392/2 Positions for the valve holders can be marked out from the measurements indicated in Fig. 2.
valve noise n.
ΚΠ
1919 W. D. Owen Guide Ionic Valve 13 It is seldom possible to use more than three or four in cascade efficiently on account of the many curious ‘valve noises’ that result.
valve oscillator n.
ΚΠ
1935 Discovery Aug. 226/1 In some forms of valve oscillator, the high-tension supply is such that only half of the wave of the a.c. feed mains is rectified.
valve receiver n.
ΚΠ
1913 Wireless World Nov. 478/1 A valve receiver of rather longer range than usual is used.
1929 Radio Times 8 Nov. 437/1 This popular Loud Speaker unit..gives..perfect results with any valve Receiver.
valve receiving set n.
valve set n.
ΚΠ
1929 Radio Times 397/1 Her nursery..is wired for broadcasting and..her movements or cries are now heard loud in the sitting-room..where our valve set is placed.
1981 S. Briggs Those Radio Times i. 28/2 By 1926..the valve set playing through loudspeakers replaced the simple crystal set.
valve voltmeter n.
ΚΠ
1925 Year-bk. Wireless Telegr. 847 When a control room is some distance from the transmitter it is usual to install a valve voltmeter with a slideback which either measures the voltage across the output of the main amplifier or indicates when a certain voltage is exceeded.
C2. In sense 4, as valve-flap, valve-lesion, valve segment.Many others occur in recent medical works.
ΚΠ
1879 St. George's Hosp. Rep. 9 433 The junction of two of the aortic valve-flaps.
1898 T. C. Allbutt et al. Syst. Med. V. 952 A deformed valve segment must..be a strained segment.
1898 T. C. Allbutt et al. Syst. Med. V. 1024 In the remainder there was no valve-lesion.
C3.
valve head n. Mechanics the part of a lift valve that is lifted off the valve aperture to open the valve.
ΘΚΠ
society > occupation and work > equipment > machine > machines which impart power > engine > internal-combustion engine > [noun] > parts of > valves > part of
valve head1904
1904 A. B. F. Young Compl. Motorist (ed. 2) iv. 91 The valve-head is provided with a slot for the insertion of a tool for grinding purposes.
1971 B. Scharf Engin. & its Lang. xii. 176 One also differentiates between ordinary, high lift and full lift safety and relief valves according to the distance by which the valve head is automatically raised.
valve-shell n. a gasteropod of the genus Valvata.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > superorder Branchifera > order Prosobranchiata > section Holostomata > family Paludinidae > member of genus Valvata
valve-shell1851
1851 S. P. Woodward Man. Mollusca i. 140 Valvata..Valve-shell.
valve-tailed bat n. (see quot.).
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the world > animals > mammals > order Chiroptera or bat > [noun] > unspecified and miscellaneous type of
blude-black1647
music-stamper1713
red bat1775
Geoffroy's bat1829
reddish-grey bat1837
notch-eared bat1840
pachyote1865
notched-eared bat1871
valve-tailed bat1871
Negro-bat1885
1871 Cassell's Nat. Hist. I. 316 (note) The Valve-tailed Bat..is remarkable..for the presence of a curious horny case, composed of two parts, which covers the extremity of the tail.
valve train n. Mechanics in an internal-combustion engine, the gearing and linkages by which the crankshaft is caused to open and close a valve at the proper time.
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society > occupation and work > equipment > machine > machines which impart power > engine > internal-combustion engine > [noun] > parts of > valves > devices which operate
throttle1838
rocker arm1850
timing gear1885
rocker1915
valve train1955
1955 W. H. Crouse Automotive Engines vii. 222 The L-head engine uses a relatively simple valve train, or valve mechanism.
1981 Pop. Hot Rodding Feb. 31/1 A Sig Erson camshaft actuates the mildly worked valve~train, composed of Crane valve-springs, steel retainers, and TRW chrome-moly pushrods.
This entry has not yet been fully updated (first published 1916; most recently modified version published online June 2022).
† valven.2
Obsolete.
A turn of a bandage.
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the world > health and disease > healing > medical appliances or equipment > bandage > [noun] > turn of bandage
valve1689
1689 J. Moyle Abstr. Sea Chyrurg. i. vi. 45 Then a soft Rouler to come several turns about it, and every valve as it comes over the wound cut..in the middle.
1689 J. Moyle Abstr. Sea Chyrurg. i. vi. 46.
This entry has not yet been fully updated (first published 1916; most recently modified version published online December 2020).
valvev.
/valv/, U.S. /vælv/ rare except in ballooning, etc.
1. transitive. To furnish with a valve or valves; to govern or check, to hold back, by a valve or similar device. Also figurative.
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society > occupation and work > equipment > machine > parts of machines > control(s) > control by another device [verb (transitive)] > furnish with valve(s)
sucker1660
valve1861
the world > life > the body > nervous system > substance of nervous system > [verb (transitive)] > furnish with valve(s)
valve1899
1861 S. Smiles Lives Engineers II. 160 Whilst the fresh waters should be allowed freely to escape, the sea should be valved back, and prevented flowing in upon the land.
1899 T. C. Allbutt et al. Syst. Med. VI. 512 It is probable that by these synapses the circuits of the nervous system..are..securely valved against regurgitation.
1960 R. W. Marks Dymaxion World Buckminster Fuller 11/1 The harnessing factor—the activity which ‘valves’ the mass-energy of the universe to human advantage—is inventive wisdom born of intuition and experience and put to use in a global industrial complex.
2. intransitive. To make use of a valve or valves; spec. in ballooning, to open a valve in order to descend.
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society > travel > air or space travel > ballooning > balloon [verb (intransitive)] > specific operations
valve1906
sandbag1928
1906 Westm. Gaz. 3 Oct. 8/1 All we could do was to undulate, alternately valving and ballasting.
1936 National Geographic Mag. 69 71 Andy valved, and valved again and again!
1963 A. Smith Throw out Two Hands v. 63 You valve a little. You start coming down.
3. transitive. To discharge gas from (an airship or balloon) by opening a valve; to discharge, or let off, (gas) thus.
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society > travel > air or space travel > ballooning > carry in or as in balloon [verb (transitive)] > discharge gas by valve
valve1925
1925 Sci. Amer. Nov. 301/3 She was swept rapidly upwards..Commander Lansdowne valved her freely, pointed her nose down with engines running, and she came down with..rapidity.
1928 Engineering 3 Aug. 141/3 As an airship uses up its fuel, it is necessary to reduce the lift, and hitherto this has been done by simply ‘valving’ off some of the hydrogen used for inflation.
1928 Daily Tel. 18 Sept. 9/6 The extra lifting effect of the expanding gas cannot be counteracted by allowing the gas to escape, or in other words by valving the gas.
1936 National Geographic Mag. 69 71 He opened the valves for..another half-minute interval (which is a very long time for a balloon to be valved at low altitude).
This entry has not yet been fully updated (first published 1916; most recently modified version published online December 2021).
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