US3196521A - Fuse cartridge - Google Patents
Fuse cartridge Download PDFInfo
- Publication number
- US3196521A US3196521A US56722A US5672260A US3196521A US 3196521 A US3196521 A US 3196521A US 56722 A US56722 A US 56722A US 5672260 A US5672260 A US 5672260A US 3196521 A US3196521 A US 3196521A
- Authority
- US
- United States
- Prior art keywords
- link
- shell
- mold
- core
- bodies
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 claims description 13
- 238000010791 quenching Methods 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 5
- 229920003002 synthetic resin Polymers 0.000 claims description 5
- 239000000057 synthetic resin Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000012811 non-conductive material Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 241001125879 Gobio Species 0.000 description 8
- 239000012212 insulator Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 5
- 238000009750 centrifugal casting Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 241000251131 Sphyrna Species 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 102100034742 Rotatin Human genes 0.000 description 1
- 101710200213 Rotatin Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- KRTSDMXIXPKRQR-AATRIKPKSA-N monocrotophos Chemical compound CNC(=O)\C=C(/C)OP(=O)(OC)OC KRTSDMXIXPKRQR-AATRIKPKSA-N 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
- H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified
- H01H85/045—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified cartridge type
- H01H85/0456—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified cartridge type with knife-blade end contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/18—Casing fillings, e.g. powder
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49107—Fuse making
Definitions
- end plates or caps are each provided in addition with a T-shaped appendage projecting radially outward beyond the periphery of the insulator to be engaged by an insulating handle for inserting the cartridge in and removin it from a socket without danger of touching live parts.
- the object of the invention is to provide a fuse cartridge of the kind referred to, requiring only a minimum of individual parts for fuses of the said kind, their a sembly requiring no auxiliary equip sent and only a minimum of manual labor.
- the terminals which are subject to some mechanical stress, become quite firmly seated in the wall of the cast casing, especially when provided with rough spots, recesses or projections located Within the casing wall.
- the appendages with T-shaped or hammerhead ends for engaging a handle may be attached to the terminals in conventional manner, and likewise imbedded in casing material except for their exposed outside ends.
- the new type of fuse cartridge alternatively permits insertion of these appendages in the casing wall, advantageously in thickened parts thereof, in such manner that fz fllliifizl Patented July 27, 1965 they do not touch the terminals themselves and are thus electrically insulated from them.
- a fuse of the kind described may be fabricated in various ways involving, in each instance, the consecutive formation of two bodies of nonconductive material in nested relationship about that part of the aforedescribed unit which includes the fusible link and the adjoining ends of the two terminal members.
- One method consists in that the link and terminals fixedly joined thereto are molded in an arc-quenching agent, with addition of a small quantity of binder that will not impair porosit and after the binder has set, the resulting molded quencher core and inner portions of the terminals projecting therefrom are enveloped with cast casing material in a suitably larger mold.
- Another method giving equally good results but more efficient in some cases, consists in that the outer casing or shell is centrifugally cast in a mold fitted with the link and terminals fixedly joined thereto, and thus at the same time united to the live parts, and after the casing material ie. a cyntheti resin) has set, the resulting casing is filled with qunching substance through a cored or drilled in the former case, two molds are required to make the fuse cartridge, one having a smaller cavity to receive only the link and terminals directly connected thereto.
- a suitable device consists of a mold receiving the link and terminals and having two projecting gudgeons on the same centenine as the cartridge, by means of which the mold is rotatably mounted in a frame; this frame in turn is rotationally driven about a shaft perpendicular to the centerline of the gudgeons, and has a disk which is centered on its axis of rotation and on which rolls a friction disk fixed on one of the gudgeons of the mold.
- Centrifugal casting devi es are likewise conceivable i which the mold is rotated on more than two axes. With correct choice of speeds of rotation about each axis, these will afford an especially uniform casing wall, and many variations in distribution of material may be obtained by varying these speeds. However, experience has shown that molds rotatin on only two mutually perpendicular axes will definitely afford adequate uniformity of Wall thickness, and also, by regulation of speeds, permit the formation of enlarged deposit of material at the points where the fuse is exposed to greater mechanical stress. For their simplicity of construction, therefore, such devices would generally be preferred.
- FIG. 1 shows a top view of a prefabricated link assembly
- FIG. 2 shows a front view of the same
- FIG. 3 shows a cross section of a mold in which the said assembly is being imbedded in quenching medium
- FIG. 4 shows a cross section of a mold for casting a casing
- FIG. 5 is a pictorial view of the final product of the foregoing operations
- FIG. 6 is a pictorial view of a device for centrifugal casting of a hollow cartridge casing
- FIG. 7 is a front view of the same.
- FIG. 8 is an end View of the same.
- FIGS. 1 and 2 The assembly in FIGS. 1 and 2 consists of two terminals 1 and 2, in the form of knife-like contact tabs, to each of which a lateral appendage 3, 4 is attached. These appendages, whose hammerhead extremities extend beyond the confines of the fuse cartridge, serve to couple a manipulating handle with the finished cartridge. At their confronting ends, terminals 1 and 2 are connected by two fusible links 5 and 6. Between appendages 3, 4 and the points of attachment of the links 5, 6, the terminals 1, 2 have recesses 7 to be locate-d within the casing wall of the finished fuse cartridge.
- the mold of FIG. 3 consists of two halves 8 and 9, for casting the core of porous arc-quenching material 10 enveloping the links 5, 6. These two halves accommodate the terminals 1 and 2, with appendages 3 and 4, and provide a cavity in the shape of the inner core around the links 5, 6 and their points of attachment to terminals 1 and 2. A part 11 in half 8 serves to admit quenching substance with a small quantity of binder added.
- the mold of FIG. 4 for casting the casing or shell 12 similarly consists of two parts 13 and 14, accommodating the portions of terminals 1 and 2 projecting from the casing, and forms a cavity greater by the wall thickness of the casing than the core 10.
- the shell 12 integrally formed in this mold embraces the conductor members 1, 2 received therein.
- the mold 13, 14 may be modified so as to enlarge its cavity at the inner portions of the terminals, so that a fuse cartridge cast in it may have somewhat the form represented in FIG. 5.
- the mold 15 receiving the prefabricated unit of FIGS. 1 and 2 has a cavity, around links 5, 6, conforming to the shape of a cartridge casing of the kind shown in FIG. 5.
- the mold 15 is provided with two gudgeons 16 and 17 on the same centerline as the fuse, and these are mounted in a frame 18.
- the frame 13 is supported by two gudgeons 19, 20, for rotation about an axis perpendicularly bisecting the centerline of gudgeons 16, 17, and can be driven in the direction of the arrow (FIG. 8).
- frame 18 On one side, frame 18 has a disk 21 which turns with it about its axis of rotation and upon which there rolls a friction disk 22, non-rotatably mounted on gudgeon 16 of mold 115 but longitudinally adjustable thereon for example along a track 23 (FIG. 6).
- the mold 15 has a cylindrical boss 24, directed into the cavity and visible in FIG. 8, for coring a hole to be afterwards used to introduce comminuted quenching material into the casing for forming the core 10 of FIGS. 2 and 3.
- the mold 15 may in addition he provided with a closable port (not shown) for introduction of a predetermined quantity of synthetic resin serving as the cast-
- a closable port not shown
- the shell 12 formed within the mold 15 is anchored to intermediate portions of the terminal memhers 1, 2 just beyond the ends joined to the fusible link 5, 6 which are to be imbedded in the porous core 10.
- a method of making a cartridge fuse comprising the steps of producing a conductive unit including a pair of spaced-apart elongated conductor members having confronting ends joined by a fusible link, and consecutively forming two bodies of nonconductive material in nested relationship about said link and said confronting ends, one of said bodies being a porous inner core of arc-quenching material completely enveloping said link and said confronting ends, the other of said bodies being an integrally molded one piece shell of synthetic resin closely surrounding said core in direct contact with the entire core surface while letting outer extremities thereof project outwardly from the shell, the molding of said shell being carried out in a split mold having a cavity accommodating said link and said confronting ends, upon a gripping of said outer extremity between separable parts of the mold, with an all-around clearance corresponding to the combined thickness of said shell and said core.
- a method of making a cartridge fuse comprising the steps of producing a conductive unit including a pair of spaced-apart elongated conductor members having confronting ends joined by a fusible link, and consecutively forming two bodies of nonconductive material in nested relationship about said link and said confronting ends, one of said bodies being a porous inner core of arcquenching material extending around said link and said confronting ends, the other or" said bodies being an integrally molded shell of synthetic resin formed before said core and closely enveloping said core and embracing said conductor members while letting outer extremities thereof project outwardly from the shell, the step of forming said shell including placing aid conductive unit with the exception of said projecting extremities in a rotatable mold, partly filling said mold with moldable synthetic UNITED STATES PATENTS 1,862,317 6/32 Ringwald 200-420 1,875,031 8/32 Landau.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuses (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US461661A US3317690A (en) | 1960-04-04 | 1965-06-07 | Fuse cartridge |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED33033A DE1202892B (de) | 1960-04-04 | 1960-04-04 | Sicherungspatrone |
DED34704A DE1296693B (de) | 1960-04-04 | 1960-11-10 | Verfahren zum Herstellen von Sicherungspatronen |
DED0035316 | 1961-02-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3196521A true US3196521A (en) | 1965-07-27 |
Family
ID=27209695
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US56722A Expired - Lifetime US3196521A (en) | 1960-04-04 | 1960-09-19 | Fuse cartridge |
US84769A Expired - Lifetime US3166656A (en) | 1960-04-04 | 1961-01-25 | Cartridge fuse |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US84769A Expired - Lifetime US3166656A (en) | 1960-04-04 | 1961-01-25 | Cartridge fuse |
Country Status (7)
Country | Link |
---|---|
US (2) | US3196521A (zh) |
CH (3) | CH381312A (zh) |
DE (2) | DE1202892B (zh) |
FI (1) | FI40397B (zh) |
IT (1) | IT699995A (zh) |
LU (2) | LU39090A1 (zh) |
NL (3) | NL255898A (zh) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3317689A (en) * | 1963-04-05 | 1967-05-02 | Ferraz & Cie Lucien | Cartridge fuses with non-porous arc-quenching material |
US3319027A (en) * | 1965-01-26 | 1967-05-09 | Chase Shawmut Co | Encapsulated fuse structure for polyphase circuits |
US3337705A (en) * | 1964-01-27 | 1967-08-22 | Chase Shawmut Co | Fusible protective device |
US3368047A (en) * | 1967-06-19 | 1968-02-06 | Westinghouse Electric Corp | Fuse having a sand core |
US3654696A (en) * | 1970-01-29 | 1972-04-11 | Bernard Wechsler | Method for manufacturing electric fuses |
US3914863A (en) * | 1972-05-04 | 1975-10-28 | Gerald Wiebe | Method of forming a fuse |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3317690A (en) * | 1960-04-04 | 1967-05-02 | Driescher Spezialfab Fritz | Fuse cartridge |
US3268698A (en) * | 1963-08-12 | 1966-08-23 | Westinghouse Electric Corp | Electrical apparatus comprising sulfur hexafluoride and organic insulation with anhydrous calcium sulfate |
US3358064A (en) * | 1964-03-24 | 1967-12-12 | Vitramon Inc | Encapsulating molding composition and method for molding the same |
US3838375A (en) * | 1973-01-29 | 1974-09-24 | Gen Electric | Current limiting fuse |
DE2928822A1 (de) * | 1979-07-17 | 1981-02-05 | Siemens Ag | Hochspannungs-hochleistungssicherung |
US4313099A (en) * | 1980-01-03 | 1982-01-26 | Mcgraw-Edison Company | Current limiting fuse having aluminum sulfate arc-quenching filler |
US5670926A (en) * | 1995-06-08 | 1997-09-23 | General Electric Company | High-voltage fuse having a core of bound silica sand about which fusible elements are wound |
EP1162640A1 (de) * | 2000-06-07 | 2001-12-12 | Abb Research Ltd. | Löschmedium zum Löschen von Lichtbögen |
US6642833B2 (en) | 2001-01-26 | 2003-11-04 | General Electric Company | High-voltage current-limiting fuse |
FI117587B (fi) | 2004-06-18 | 2006-11-30 | Nethawk Oyj | Menetelmä, laite ja tietokoneohjelmatuote tiedonsiirtoyhteyksien monitorointiin |
DE102013208135B4 (de) | 2013-05-03 | 2023-11-09 | Robert Bosch Gmbh | Batterie mit Überladungsschutz |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1862317A (en) * | 1927-12-23 | 1932-06-07 | Schweitzer & Conrad Inc | Fuse |
US1875031A (en) * | 1928-11-10 | 1932-08-30 | Gen Chemical Corp | Machine for making wax bottles |
US1934459A (en) * | 1928-03-23 | 1933-11-07 | Gen Electric | High vacuum fuse |
US2493434A (en) * | 1946-03-21 | 1950-01-03 | Joslyn Mfg And Supply Company | Method of manufacturing fuse links |
US2681398A (en) * | 1953-03-27 | 1954-06-15 | Chase Shawmut Co | Fluid-tight fuse structure |
US2740187A (en) * | 1955-03-07 | 1956-04-03 | Chase Shawmut Co | Methods of assembling fuses |
US2830156A (en) * | 1956-12-21 | 1958-04-08 | Jr Arthur A Burgess | Shock and vibration resistant fuse |
US2847707A (en) * | 1956-01-23 | 1958-08-19 | Walter J Maker | Apparatus for encapsulating articles in a plastic coating |
US2892061A (en) * | 1958-07-24 | 1959-06-23 | Chase Shawmut Co | Fuses with fulgurite suppressing means |
US2895031A (en) * | 1958-07-24 | 1959-07-14 | Chase Shawmut Co | Fusible protective devices |
US2940161A (en) * | 1955-10-11 | 1960-06-14 | Western Electric Co | Methods of making encapsulated electrical devices |
US2946092A (en) * | 1958-08-04 | 1960-07-26 | Barr Rubber Products Company | Apparatus for rotationally distributing a liquid charge within a mold |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE412490C (de) * | 1923-07-13 | 1925-04-23 | Elfa Elektrotechnische Fabrik | Schmelzeinsatz mit veraenderlichem Querschnitt und mit Umpressung aus Isoliermaterial |
US1935885A (en) * | 1930-01-15 | 1933-11-21 | Telefunken Gmbh | Electrical apparatus |
US1947085A (en) * | 1931-09-22 | 1934-02-13 | Westinghouse Electric & Mfg Co | Electrical apparatus |
US2328825A (en) * | 1941-09-25 | 1943-09-07 | Schweitzer & Conrad Inc | Arc-extinguishing means |
US2768264A (en) * | 1953-04-28 | 1956-10-23 | Rostone Corp | Arc-suppressing device |
US2816990A (en) * | 1954-09-24 | 1957-12-17 | Westinghouse Electric Corp | Circuit breaker |
US2948930A (en) * | 1955-08-09 | 1960-08-16 | Biwax Corp | Method of potting electrical equipment |
US2949641A (en) * | 1956-06-26 | 1960-08-23 | Whitney Blake Co | Electrical connector manufacture |
US2941905A (en) * | 1957-04-05 | 1960-06-21 | Westinghouse Electric Corp | Filled organopolysiloxane coating for electrical members |
US2866038A (en) * | 1957-05-09 | 1958-12-23 | Chase Shawmut Co | Current-limiting fuses with increased interrupting capacity |
US2961514A (en) * | 1959-01-19 | 1960-11-22 | S & C Electric Co | Circuit interrupter |
US3030597A (en) * | 1958-02-28 | 1962-04-17 | Westinghouse Electric Corp | Insulated electrical apparatus |
-
0
- NL NL272345D patent/NL272345A/xx unknown
- IT IT699995D patent/IT699995A/it unknown
- NL NL133175D patent/NL133175C/xx active
- NL NL255898D patent/NL255898A/xx unknown
-
1960
- 1960-04-04 DE DED33033A patent/DE1202892B/de active Pending
- 1960-08-18 LU LU39090D patent/LU39090A1/xx unknown
- 1960-09-19 US US56722A patent/US3196521A/en not_active Expired - Lifetime
- 1960-11-10 DE DED34704A patent/DE1296693B/de active Pending
- 1960-12-19 CH CH1415660A patent/CH381312A/de unknown
- 1960-12-20 LU LU39561D patent/LU39561A1/xx unknown
- 1960-12-29 FI FI2130/60A patent/FI40397B/fi active
-
1961
- 1961-01-14 CH CH45361A patent/CH392671A/de unknown
- 1961-01-25 US US84769A patent/US3166656A/en not_active Expired - Lifetime
- 1961-11-23 CH CH1364261A patent/CH388431A/de unknown
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1862317A (en) * | 1927-12-23 | 1932-06-07 | Schweitzer & Conrad Inc | Fuse |
US1934459A (en) * | 1928-03-23 | 1933-11-07 | Gen Electric | High vacuum fuse |
US1875031A (en) * | 1928-11-10 | 1932-08-30 | Gen Chemical Corp | Machine for making wax bottles |
US2493434A (en) * | 1946-03-21 | 1950-01-03 | Joslyn Mfg And Supply Company | Method of manufacturing fuse links |
US2681398A (en) * | 1953-03-27 | 1954-06-15 | Chase Shawmut Co | Fluid-tight fuse structure |
US2740187A (en) * | 1955-03-07 | 1956-04-03 | Chase Shawmut Co | Methods of assembling fuses |
US2940161A (en) * | 1955-10-11 | 1960-06-14 | Western Electric Co | Methods of making encapsulated electrical devices |
US2847707A (en) * | 1956-01-23 | 1958-08-19 | Walter J Maker | Apparatus for encapsulating articles in a plastic coating |
US2830156A (en) * | 1956-12-21 | 1958-04-08 | Jr Arthur A Burgess | Shock and vibration resistant fuse |
US2892061A (en) * | 1958-07-24 | 1959-06-23 | Chase Shawmut Co | Fuses with fulgurite suppressing means |
US2895031A (en) * | 1958-07-24 | 1959-07-14 | Chase Shawmut Co | Fusible protective devices |
US2946092A (en) * | 1958-08-04 | 1960-07-26 | Barr Rubber Products Company | Apparatus for rotationally distributing a liquid charge within a mold |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3317689A (en) * | 1963-04-05 | 1967-05-02 | Ferraz & Cie Lucien | Cartridge fuses with non-porous arc-quenching material |
US3337705A (en) * | 1964-01-27 | 1967-08-22 | Chase Shawmut Co | Fusible protective device |
US3319027A (en) * | 1965-01-26 | 1967-05-09 | Chase Shawmut Co | Encapsulated fuse structure for polyphase circuits |
US3368047A (en) * | 1967-06-19 | 1968-02-06 | Westinghouse Electric Corp | Fuse having a sand core |
US3654696A (en) * | 1970-01-29 | 1972-04-11 | Bernard Wechsler | Method for manufacturing electric fuses |
US3914863A (en) * | 1972-05-04 | 1975-10-28 | Gerald Wiebe | Method of forming a fuse |
Also Published As
Publication number | Publication date |
---|---|
NL255898A (zh) | |
LU39090A1 (zh) | 1960-10-18 |
CH381312A (de) | 1964-08-31 |
NL133175C (zh) | |
NL272345A (zh) | |
CH392671A (de) | 1965-05-31 |
FI40397B (zh) | 1968-09-30 |
US3166656A (en) | 1965-01-19 |
DE1202892B (de) | 1965-10-14 |
DE1296693B (de) | 1969-06-04 |
CH388431A (de) | 1965-02-28 |
IT699995A (zh) | |
LU39561A1 (zh) | 1961-02-20 |
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