leakagen.

Brit.

/ˈliːkɪdʒ/, U.S.

/ˈlikɪdʒ/

Forms: Also Middle English–1600s lecage, 1500s lekkege, 1700s leekage.

Etymology: < leak v. + -age suffix. Compare Dutch lekkage.

1. The action of leaking; admission or escape of water or other fluid through a hole in a vessel, etc.; loss of fluid by this means.

ΘΚΠ

the mind > possession > loss > [noun] > loss of fluid

leakagec1503

leak1828

the world > matter > liquid > liquid which has been emitted > action or process of leaking > [noun]

leak1487

leakagec1503

leaking1611

sipage1825

the world > movement > motion in a certain direction > going or coming out > [noun] > of something confined > of liquid > leaking

leakagec1503

leaking1611

leak1896

c1503 ( Indenture in R. Arnold Chron. f. xl/2 Alle maner auenturs fortunes perillis and ioperdies of alle the sayd wynes lecage forst & egirnesse of the same oonly exepte.

1622 G. de Malynes Consuetudo 195 Allowances made..vpon Wines in regarde of lecage of tenne or fifteene vpon the hundreth.

1633 T. James Strange Voy. 45 I would take no excuse of leakage or other waste.

1739 C. Labelye Short Acct. Piers Westm. Bridge 34 By the Help of only four Pumps..we easily master'd what Leakage we had.

1748 B. Robins & R. Walter Voy. round World by Anson ii. x. 241 Jars..are liable to no leekage, unless they are broken.

1825 ‘J. Nicholson’ Operative Mechanic 198 We have seen an engine of an eight-horse power of this kind at work, with a fluid metal on the pistons: it effectually prevented the leakage.

1861 T. L. Peacock Gryll Grange xix. 161 The subsoil of London,..converted by gas leakage into one mass of pestilent blackness.

1875 H. C. Wood Treat. Therapeutics (1879) 509 A form of secretion, or..leakage, from mucous membranes.

a. transferred and figurative. Diminution resulting from gradual waste or escape; improper or deliberate disclosure of information from an office, etc.; unexplained continuous disappearance of something.

ΘΚΠ

the world > relative properties > quantity > decrease or reduction in quantity, amount, or degree > [noun] > gradual

wastinga1425

leakage1642

dwindle1779

dwindling1884

rundown1890

diminuendo1891

phase-down1958

wind-down1969

tail-off1975

build-down1983

society > communication > manifestation > disclosure or revelation > [noun] > a disclosure > disclosure of secret information

tellinga1325

unsecrecy159.

blabbing1596

elimination1601

leaking1611

babblement1825

leakage1863

betrayal1873

dobbing1968

1642 T. Fuller Holy State Pref. sig. A3 I will stop the leakage of my soul, and what heretofore hath run out in writing, shall hereafter..be improved in constant preaching.

1673 Bp. S. Parker Reproof Rehearsal Transprosed 11 They..weaken themselves by too great a leakage of their power.

1859 ‘T. Titcomb’ Titcomb's Lett. (ed. 12) ii. 185 It is entirely rational and right that your wife should understand the basis of all your requirements of her; and when she does this, the chances are that she will not only be economical herself, but will point out leakages in your prosperity for which you are responsible.

1863 A. W. Kinglake Invasion of Crimea I. 452 The Cabinet of Lord Aberdeen was not famous for its power of preventing the leakage of state matters.

1880 E. W. Hamilton Diary 30 Nov. (1972) I. 83 There have of late curiously been some leakages. My own belief is that men like Chamberlain and Forster..are most unguarded in their language outside.

1890 Daily News 17 Oct. 7/2 It was discovered that there was a ‘leakage’ in the stamp transfer forms.

1893 R. S. Ball Story of Sun 270 The leakage of heat is..slow.

1894 Westm. Gaz. 19 Sept. 3/3 That leakage from the faith which is taking place among the poor Catholics.

1895 Month May 115 The ‘leakage’ going on in the Catholic Church in the British Isles.

1898 Daily News 17 Feb. 2/7 The prizes..for three best essays on the cause of the leakage in the membership of the Methodist Church,..have been awarded.

1898 Daily News 20 Oct. 6/5 Some extracts..have found their way into the pages of the ‘New York Critic’... I am unable..to account for this leakage.

1900 Speaker 22 Sept. 668/1 The frightful leakage from deaths, wounds and sickness.

1900 Edinb. Rev. July 81 The tide of emigration has been stayed..the leakage is diminishing.

1904 A. B. F. Young Compl. Motorist 347/2 Leakage of small moneys, during travel.

1908 H. G. Wells War in Air i. 25 Mr. K. Butteridge..intended to keep his secret safe from any further risk of leakage.

1945 E. Waugh Brideshead Revisited 10 Our new commanding officer was making an unusual display of ‘security’... ‘If I find any of these female camp followers waiting for us the other end, I'll know there's been a leakage.’

1972 Times 30 Sept. 1/1 The [Franks] committee proposes an Official Information Act to cover leakage of information which would seriously injure the national interest.

1973 A. Christie Postern of Fate iii. xvii. 248 There were leakages—as always there are leakages in time of war.

b. A gradual escape of electrical charge or current, esp. as a result of imperfect insulation. Also, in Magnetism, an escape of flux from a magnetic circuit or device; flux which does not pass through the secondary of a transformer or induction coil, or through the armature of a motor or generator.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > result of defective insulation

leak1863

leakage1863

leakage conductance1887

leakance1893

sneak-current1899

creepage1958

the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > magnetic flux > escape of flux

leak1863

leakage1902

the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > transformer > [noun] > flux avoiding

leakage1902

the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > armature > [noun] > flux not passing through armature

leakage1922

the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > electromagnetic induction > [noun] > induction coil > flux not passing through

leakage1962

1863 R. S. Culley Handbk. Pract. Telegr. iv. 59 On a long line the leakage from wire to wire through damp air cannot be altogether without effect.

1902 Encycl. Brit. XXVII. 586/2 Since no substance is impermeable to the passage of magnetic flux, the only form of magnetic circuit free from leakage is one uniformly wound..over its whole length.

1922 R. Glazebrook Dict. Appl. Physics II. 190/1 Allowance must be made for flux which leaks across the intervening space between the poles and does not actually enter the armature, and a magnetic circuit has to be designed so as to keep this leakage as small as possible.

1962 Newnes Conc. Encycl. Electr. Engin. 229/1 Danger from leakage may be prevented on metal pole lines by a continuous earth wire connected to the poles.

1962 D. F. Shaw Introd. Electronics i. 7 If the coil is long enough for the solenoid formula to apply there will be a considerable leakage of flux between the turns.

3. concrete.

a. That which leaks or oozes out. Also figurative.

ΘΚΠ

the mind > possession > loss > [noun] > loss of fluid > a leak

leakagea1661

leak1828

a1661 T. Fuller Worthies (1662) Hants. 13 I behold these his Books as the Receptacle of the Leakage and Superfluities of his Study.

1793 J. Smeaton Narr. Edystone Lighthouse (ed. 2) §313 A very small leakage came in.

1819 W. Irving Sketch Bk. v. 360 Those nameless hangers-on..do all kind of odd jobs, for the privilege of battening on the drippings of the kitchen and the leakage of the tap-room.

†b. A leak. Obsolete. rare.

ΘΚΠ

the world > matter > liquid > liquid which has been emitted > action or process of leaking > [noun] > hole or fissure in vessel containing fluid

leak1487

leakage1776

the world > space > relative position > condition of being open or not closed > an opening or aperture > [noun] > communicating with outside or air > a leak

leak1487

inleck1582

leakage1776

1776 G. Semple Treat. Building in Water 102 Get the Water..taken out, corking any Leakages that may happen to appear.

4. Allowance made for waste of fluid by leakage from the containing vessels.

ΚΠ

1591 in W. Greenwell Wills & Inventories Registry Durham (1860) II. 108 40s. for freght, 40s. for impost, the lekkege in myne owne hand, by estimation, 26s.

1735 in Public Rec. Colony of Connecticut (1873) VII. 563 The said retailer..will pay to the said commissioner the duty laid thereon by the excise act, substracting only one fifth part thereof for leakage and wastage.

1809 R. Langford Introd. Trade 132 Leakage, allowance of duty for waste of liquor from the vessels leaking or other causes.

1861 S. Smiles Lives Engineers II. 196 The lightermen claimed as their right the perquisites of ‘wastage’ and ‘leakage’.

Compounds

C1. General attributive. (In sense 2b.)

leakage current n.

ΚΠ

1880 Jrnl. Soc. Telegr. Engineers 9 456 The additional term (v/i)dx is the leakage current of dx, viz., the potential of dx divided by its insulation resistance.

1908 Installation News 2 55/2 Providing for the leakage current a path to earth.

1962 J. Bell in G. A. T. Burdett Automatic Control Handbk. iv. 3 The insulation to earth must be maintained in the megohms region otherwise the inaccuracy due to leakage currents will be significant.

leakage flux n.

ΚΠ

1896 F. Bedell Princ. Transformer xv. 302 The leakage flux varies inversely as the reluctance of the leakage path.

1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields vii. 291 Let us consider a toroid of magnetic material with a localized winding... The leakage flux, that is, the flux of B which leaves the core, produces poles on the surface..and these poles contribute an intensity H within the iron.

leakage path n.

ΚΠ

1896Leakage path [see leakage flux n.].

1909 Installation News 3 64/1 The leakage path to the conduit or earth is now very greatly reduced.

1962 Newnes Conc. Encycl. Electr. Engin. 437/1 It is usual to assume that those parts of a leakage path lying in ferro~magnetic material will require a negligible proportion of the coil m.m.f.

C2.

leakage conductance n. = leakance n.

ΘΚΠ

the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > result of defective insulation

leak1863

leakage1863

leakage conductance1887

leakance1893

sneak-current1899

creepage1958

1887 Electrician 3 June 80/2 The attenuation factor is now ε^−R/2Lν.ε^−K/2Sν, if K be the leakage conductance, and S the permittance per unit length.

leakage detector n. (a) = leak detector n. at leak n. Compounds; (b) = leakage indicator n.

ΘΚΠ

the world > matter > liquid > liquid which has been emitted > action or process of leaking > [noun] > device for detecting leaks

leakage detector1880

the world > matter > physics > electromagnetic radiation > electricity > electric charge, electricity > [noun] > detector of leaks

leakage detector1880

the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > magnetic flux > escape of flux > detector of

leakage detector1880

the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > result of defective insulation > device indicating

leakage detector1880

leakage indicator1920

1880 English Mechanic Oct. 107/3 Cowan's meters, and Mr. Young's..leakage-detector are prominent exhibits [at the Exhibition of Gas and Electrical Apparatus].

1901 Catal. Mech. Engin. Collection Sci. Div. V. & A. Mus. (ed. 3) I. 220 Leakage detector... This is an instrument for rendering audible the slight sound made by water flowing in a pipe, so that if the noise continues, after certain valves are closed, the existence of a leak is indicated.

1923 J. W. Meares & R. E. Neale Electr. Engin. Pract. (ed. 4) I. xv. 499 In the Howard leakage detector a current transformer is connected in the earthing wire of, say, a switchboard frame, and the secondary of the current transformer is connected to a tripping relay.

1971 Instruments & Exper. Techniques XIV. 830 The leakage detector operates in stable fashion when the pickup is situated in a high vacuum.

leakage indicator n. Electrical Engineering any device for indicating or measuring leakage currents flowing to earth.

ΘΚΠ

leakage detector1880

leakage indicator1920

1920 Whittaker's Electr. Engineer's Pocket-bk. (ed. 4) 276 The function of a leakage indicator is to provide information as to the insulation resistance of the whole of the electrical system..to which it is connected.

1958 J. L. Watts Electr. Maintenance & Repairs iii. 43 Where the supply is obtained from a three-wire d.c. system with earthed mid~point, a suitable differential ammeter connected across shunts in the positive and negative mains will serve as a leakage indicator.

Draft additions 1997

Also, the passage of radiation, flux, or the like through an intended barrier.

ΘΚΠ

the world > movement > motion in a certain direction > going or coming out > [noun] > of something confined > of radiation, flux, etc.

leakage1928

1928 Science 23 Nov. 516/2 The leakage of helium through Pyrex glass at elevated temperatures has been noted by various observers.

1938 S.A.E. Jrnl. May 36/1 Another method of magnetic testing..involves the use of Magnaflux in which the parts to be inspected are first longitudinally or circularly magnetized... When properly magnetized, defects result in local flux leakage. Magnaflux powder, being of high magnetic permeability..adheres along the lines of flux leakage.

1958 O. R. Frisch Nucl. Handbk. xvi. 32 Certain types of magnet have leakage factors which vary within fairly narrow limits.

1987 Which? July 302/1 We check all ovens we test for microwave leakage and have never found one which failed the current British Standard requirements.

This entry has not yet been fully updated (first published 1902; most recently modified version published online March 2022).

单词	leakage
释义	leakagen. Brit. /ˈliːkɪdʒ/, U.S. /ˈlikɪdʒ/ Forms: Also Middle English–1600s lecage, 1500s lekkege, 1700s leekage. Etymology: < leak v. + -age suffix. Compare Dutch lekkage. 1. The action of leaking; admission or escape of water or other fluid through a hole in a vessel, etc.; loss of fluid by this means. ΘΚΠ the mind > possession > loss > [noun] > loss of fluid leakagec1503 leak1828 the world > matter > liquid > liquid which has been emitted > action or process of leaking > [noun] leak1487 leakagec1503 leaking1611 sipage1825 the world > movement > motion in a certain direction > going or coming out > [noun] > of something confined > of liquid > leaking leakagec1503 leaking1611 leak1896 c1503 ( Indenture in R. Arnold Chron. f. xl/2 Alle maner auenturs fortunes perillis and ioperdies of alle the sayd wynes lecage forst & egirnesse of the same oonly exepte. 1622 G. de Malynes Consuetudo 195 Allowances made..vpon Wines in regarde of lecage of tenne or fifteene vpon the hundreth. 1633 T. James Strange Voy. 45 I would take no excuse of leakage or other waste. 1739 C. Labelye Short Acct. Piers Westm. Bridge 34 By the Help of only four Pumps..we easily master'd what Leakage we had. 1748 B. Robins & R. Walter Voy. round World by Anson ii. x. 241 Jars..are liable to no leekage, unless they are broken. 1825 ‘J. Nicholson’ Operative Mechanic 198 We have seen an engine of an eight-horse power of this kind at work, with a fluid metal on the pistons: it effectually prevented the leakage. 1861 T. L. Peacock Gryll Grange xix. 161 The subsoil of London,..converted by gas leakage into one mass of pestilent blackness. 1875 H. C. Wood Treat. Therapeutics (1879) 509 A form of secretion, or..leakage, from mucous membranes. 2. a. transferred and figurative. Diminution resulting from gradual waste or escape; improper or deliberate disclosure of information from an office, etc.; unexplained continuous disappearance of something. ΘΚΠ the world > relative properties > quantity > decrease or reduction in quantity, amount, or degree > [noun] > gradual wastinga1425 leakage1642 dwindle1779 dwindling1884 rundown1890 diminuendo1891 phase-down1958 wind-down1969 tail-off1975 build-down1983 society > communication > manifestation > disclosure or revelation > [noun] > a disclosure > disclosure of secret information tellinga1325 unsecrecy159. blabbing1596 elimination1601 leaking1611 babblement1825 leakage1863 betrayal1873 dobbing1968 1642 T. Fuller Holy State Pref. sig. A3 I will stop the leakage of my soul, and what heretofore hath run out in writing, shall hereafter..be improved in constant preaching. 1673 Bp. S. Parker Reproof Rehearsal Transprosed 11 They..weaken themselves by too great a leakage of their power. 1859 ‘T. Titcomb’ Titcomb's Lett. (ed. 12) ii. 185 It is entirely rational and right that your wife should understand the basis of all your requirements of her; and when she does this, the chances are that she will not only be economical herself, but will point out leakages in your prosperity for which you are responsible. 1863 A. W. Kinglake Invasion of Crimea I. 452 The Cabinet of Lord Aberdeen was not famous for its power of preventing the leakage of state matters. 1880 E. W. Hamilton Diary 30 Nov. (1972) I. 83 There have of late curiously been some leakages. My own belief is that men like Chamberlain and Forster..are most unguarded in their language outside. 1890 Daily News 17 Oct. 7/2 It was discovered that there was a ‘leakage’ in the stamp transfer forms. 1893 R. S. Ball Story of Sun 270 The leakage of heat is..slow. 1894 Westm. Gaz. 19 Sept. 3/3 That leakage from the faith which is taking place among the poor Catholics. 1895 Month May 115 The ‘leakage’ going on in the Catholic Church in the British Isles. 1898 Daily News 17 Feb. 2/7 The prizes..for three best essays on the cause of the leakage in the membership of the Methodist Church,..have been awarded. 1898 Daily News 20 Oct. 6/5 Some extracts..have found their way into the pages of the ‘New York Critic’... I am unable..to account for this leakage. 1900 Speaker 22 Sept. 668/1 The frightful leakage from deaths, wounds and sickness. 1900 Edinb. Rev. July 81 The tide of emigration has been stayed..the leakage is diminishing. 1904 A. B. F. Young Compl. Motorist 347/2 Leakage of small moneys, during travel. 1908 H. G. Wells War in Air i. 25 Mr. K. Butteridge..intended to keep his secret safe from any further risk of leakage. 1945 E. Waugh Brideshead Revisited 10 Our new commanding officer was making an unusual display of ‘security’... ‘If I find any of these female camp followers waiting for us the other end, I'll know there's been a leakage.’ 1972 Times 30 Sept. 1/1 The [Franks] committee proposes an Official Information Act to cover leakage of information which would seriously injure the national interest. 1973 A. Christie Postern of Fate iii. xvii. 248 There were leakages—as always there are leakages in time of war. b. A gradual escape of electrical charge or current, esp. as a result of imperfect insulation. Also, in Magnetism, an escape of flux from a magnetic circuit or device; flux which does not pass through the secondary of a transformer or induction coil, or through the armature of a motor or generator. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > result of defective insulation leak1863 leakage1863 leakage conductance1887 leakance1893 sneak-current1899 creepage1958 the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > magnetic flux > escape of flux leak1863 leakage1902 the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > transformer > [noun] > flux avoiding leakage1902 the world > matter > physics > electromagnetic radiation > electricity > electrical engineering > armature > [noun] > flux not passing through armature leakage1922 the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > electromagnetic induction > [noun] > induction coil > flux not passing through leakage1962 1863 R. S. Culley Handbk. Pract. Telegr. iv. 59 On a long line the leakage from wire to wire through damp air cannot be altogether without effect. 1902 Encycl. Brit. XXVII. 586/2 Since no substance is impermeable to the passage of magnetic flux, the only form of magnetic circuit free from leakage is one uniformly wound..over its whole length. 1922 R. Glazebrook Dict. Appl. Physics II. 190/1 Allowance must be made for flux which leaks across the intervening space between the poles and does not actually enter the armature, and a magnetic circuit has to be designed so as to keep this leakage as small as possible. 1962 Newnes Conc. Encycl. Electr. Engin. 229/1 Danger from leakage may be prevented on metal pole lines by a continuous earth wire connected to the poles. 1962 D. F. Shaw Introd. Electronics i. 7 If the coil is long enough for the solenoid formula to apply there will be a considerable leakage of flux between the turns. 3. concrete. a. That which leaks or oozes out. Also figurative. ΘΚΠ the mind > possession > loss > [noun] > loss of fluid > a leak leakagea1661 leak1828 a1661 T. Fuller Worthies (1662) Hants. 13 I behold these his Books as the Receptacle of the Leakage and Superfluities of his Study. 1793 J. Smeaton Narr. Edystone Lighthouse (ed. 2) §313 A very small leakage came in. 1819 W. Irving Sketch Bk. v. 360 Those nameless hangers-on..do all kind of odd jobs, for the privilege of battening on the drippings of the kitchen and the leakage of the tap-room. †b. A leak. Obsolete. rare. ΘΚΠ the world > matter > liquid > liquid which has been emitted > action or process of leaking > [noun] > hole or fissure in vessel containing fluid leak1487 leakage1776 the world > space > relative position > condition of being open or not closed > an opening or aperture > [noun] > communicating with outside or air > a leak leak1487 inleck1582 leakage1776 1776 G. Semple Treat. Building in Water 102 Get the Water..taken out, corking any Leakages that may happen to appear. 4. Allowance made for waste of fluid by leakage from the containing vessels. ΚΠ 1591 in W. Greenwell Wills & Inventories Registry Durham (1860) II. 108 40s. for freght, 40s. for impost, the lekkege in myne owne hand, by estimation, 26s. 1735 in Public Rec. Colony of Connecticut (1873) VII. 563 The said retailer..will pay to the said commissioner the duty laid thereon by the excise act, substracting only one fifth part thereof for leakage and wastage. 1809 R. Langford Introd. Trade 132 Leakage, allowance of duty for waste of liquor from the vessels leaking or other causes. 1861 S. Smiles Lives Engineers II. 196 The lightermen claimed as their right the perquisites of ‘wastage’ and ‘leakage’. Compounds C1. General attributive. (In sense 2b.) leakage current n. ΚΠ 1880 Jrnl. Soc. Telegr. Engineers 9 456 The additional term (v/i)dx is the leakage current of dx, viz., the potential of dx divided by its insulation resistance. 1908 Installation News 2 55/2 Providing for the leakage current a path to earth. 1962 J. Bell in G. A. T. Burdett Automatic Control Handbk. iv. 3 The insulation to earth must be maintained in the megohms region otherwise the inaccuracy due to leakage currents will be significant. leakage flux n. ΚΠ 1896 F. Bedell Princ. Transformer xv. 302 The leakage flux varies inversely as the reluctance of the leakage path. 1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields vii. 291 Let us consider a toroid of magnetic material with a localized winding... The leakage flux, that is, the flux of B which leaves the core, produces poles on the surface..and these poles contribute an intensity H within the iron. leakage path n. ΚΠ 1896Leakage path [see leakage flux n.]. 1909 Installation News 3 64/1 The leakage path to the conduit or earth is now very greatly reduced. 1962 Newnes Conc. Encycl. Electr. Engin. 437/1 It is usual to assume that those parts of a leakage path lying in ferro~magnetic material will require a negligible proportion of the coil m.m.f. C2. leakage conductance n. = leakance n. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > result of defective insulation leak1863 leakage1863 leakage conductance1887 leakance1893 sneak-current1899 creepage1958 1887 Electrician 3 June 80/2 The attenuation factor is now ε^−R/2Lν.ε^−K/2Sν, if K be the leakage conductance, and S the permittance per unit length. leakage detector n. (a) = leak detector n. at leak n. Compounds; (b) = leakage indicator n. ΘΚΠ the world > matter > liquid > liquid which has been emitted > action or process of leaking > [noun] > device for detecting leaks leakage detector1880 the world > matter > physics > electromagnetic radiation > electricity > electric charge, electricity > [noun] > detector of leaks leakage detector1880 the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > magnetic flux > escape of flux > detector of leakage detector1880 the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > result of defective insulation > device indicating leakage detector1880 leakage indicator1920 1880 English Mechanic Oct. 107/3 Cowan's meters, and Mr. Young's..leakage-detector are prominent exhibits [at the Exhibition of Gas and Electrical Apparatus]. 1901 Catal. Mech. Engin. Collection Sci. Div. V. & A. Mus. (ed. 3) I. 220 Leakage detector... This is an instrument for rendering audible the slight sound made by water flowing in a pipe, so that if the noise continues, after certain valves are closed, the existence of a leak is indicated. 1923 J. W. Meares & R. E. Neale Electr. Engin. Pract. (ed. 4) I. xv. 499 In the Howard leakage detector a current transformer is connected in the earthing wire of, say, a switchboard frame, and the secondary of the current transformer is connected to a tripping relay. 1971 Instruments & Exper. Techniques XIV. 830 The leakage detector operates in stable fashion when the pickup is situated in a high vacuum. leakage indicator n. Electrical Engineering any device for indicating or measuring leakage currents flowing to earth. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > transmission of electricity, conduction > non-conduction, insulation > [noun] > result of defective insulation > device indicating leakage detector1880 leakage indicator1920 1920 Whittaker's Electr. Engineer's Pocket-bk. (ed. 4) 276 The function of a leakage indicator is to provide information as to the insulation resistance of the whole of the electrical system..to which it is connected. 1958 J. L. Watts Electr. Maintenance & Repairs iii. 43 Where the supply is obtained from a three-wire d.c. system with earthed mid~point, a suitable differential ammeter connected across shunts in the positive and negative mains will serve as a leakage indicator. Draft additions 1997 Also, the passage of radiation, flux, or the like through an intended barrier. ΘΚΠ the world > movement > motion in a certain direction > going or coming out > [noun] > of something confined > of radiation, flux, etc. leakage1928 1928 Science 23 Nov. 516/2 The leakage of helium through Pyrex glass at elevated temperatures has been noted by various observers. 1938 S.A.E. Jrnl. May 36/1 Another method of magnetic testing..involves the use of Magnaflux in which the parts to be inspected are first longitudinally or circularly magnetized... When properly magnetized, defects result in local flux leakage. Magnaflux powder, being of high magnetic permeability..adheres along the lines of flux leakage. 1958 O. R. Frisch Nucl. Handbk. xvi. 32 Certain types of magnet have leakage factors which vary within fairly narrow limits. 1987 Which? July 302/1 We check all ovens we test for microwave leakage and have never found one which failed the current British Standard requirements. This entry has not yet been fully updated (first published 1902; most recently modified version published online March 2022). < n.c1503
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