US2662141A - Cartridge fuse - Google Patents
Cartridge fuse Download PDFInfo
- Publication number
- US2662141A US2662141A US277687A US27768752A US2662141A US 2662141 A US2662141 A US 2662141A US 277687 A US277687 A US 277687A US 27768752 A US27768752 A US 27768752A US 2662141 A US2662141 A US 2662141A
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- United States
- Prior art keywords
- spacer bar
- tang
- cartridge
- butt
- metallic
- 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
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Classifications
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- 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
Definitions
- This invention relates to electric circuit breakers, particularly thermal circuit breakers and more especially to fusible element thermal breakers.
- a principal object of this invention is to provide a knife blade cartridge fuse which is so constructed that all current carrying parts are associated in one assembly which may be inserted in and withdrawn as a whole from a cartridge provided with metallic end ferrules without the use of end ferrule caps.
- a further object of the invention is the construction of a cartridge fuse of the kind specified which includes an insulating stationary bar for separating knife blades which includes means for preventing undue wear upon the end surfaces of the spacer bar.
- Figure 1 is a side elevational view of a knife blade cartridge fuse embodying my invention
- Fig. 2 is a cross sectional view of the device as shown by Fig. l on a plane parallel to the broad faces of the knife blades
- Fig. 3 is a cross section of the device of Fig. 1 on a plane at a right angle to the plane upon which Fig. 2 is taken
- Fig. 4 is a cross section of the device of Fig. l in a plane parallel to the broad faces of the knife blades but viewed in a direction 180 from the direction in which Fig. 2 is viewed.
- My improved knife blade fuse includes a cartridge I of insulating material, preferably horn fibre.
- My invention utilizes two metallic end ferrules, one on each end of the cartridge I, as 3 and 5.
- These end ferrules may be made of any suitable or appropriate metal, preferably brass. They may be attached to the cartridge I in any suitable or preferred manner. I have illustrated them as secured by matching threads, as l, and with the additional security of a threaded screw 9 passing through the ferrule and into the material of the cartridge I.
- the ferrule 5 is provided with an internal shoulder Ii.
- the ferrule 3 is provided with an internal thread I3.
- knife blade assembly which includes two knife blades, one It at one end and the other ii at the other end.
- the knife blade assembly includes a stationary bar l9 of insulating material. This may well be made of harm fibre.
- each of the butt plates has a fiat plate-like portion as 25 and right angle extensions at each end, as 21 and 23.
- the right angle extension 2i seats on the end of the spacer bar.
- the right angle extension 29 seats on the end of a knife blade.
- Each of the butt plates is firmly attached to the stationary bar It by through rivets, as 3
- Knife blade I5 has the rectangular portions 35 and the tang end portion 3'1. As one end of the knife blade is a tang end portion, the butt plates, as 2 I, are interposed between the tang ends of the knife blades and the spacer bar E9, and the right angle portion, as 29, bears against the end of a tang end.
- the spacer bar, the butt plates and the tang ends are each formed with through bores, as 331 and 4 I. Within the through bores, there are positioned threaded bolts 53 and 45.
- the threaded bolts are each provided with a washer, as a? and a nut, as it.
- is positioned spanning the tang ends of the knife blades and is held securely in position by the nuts and washers so that a firm unitary selfassembly is made of the spacer bar IS, the butt plates 2
- a metallic cup 571 On knife blade i5 between the shoulders 53 and 55 and the right angle portion 2? of the butt plate 2
- This metallic cup 5? is formed with a shoulder 59 to cooperate with the shoulder I I of the ferrule 5 and with a peripheral surface 6! of an external diameter proper to centralize the metallic cup El in the through orifice 63 of the end ferrule 5.
- the metallic cup I I is also provided with a peripheral surface 55 which just fits the internal bore 6'! of the end ferrule i.
- This peripheral surface is covered with cries-cross ridges and depressions, that is, it is knurled. The object of this knurling is to provide a surface which will tend to catch and hold vaporized fusible strip metal.
- the metallic cup 51 is also provided with through vent bores, as 69 and II.
- a metallic washer I3 is provided with a slot 15 embracing the tang 31 and positioned over the vents 69 and II and between the metallic cup 51 and the butt plates, as 2
- the metalliccup l9 is provided on a portion of-- its periphery with threads 89 cooperating with'threads IS on the
- the cup 19 is also provided with
- the metallic washer 95 is provided with the slot 91 embracing the tang I1 and is. interposed between the metallic cup 19 and the right angle portion 81 of-thebuttplate 23.
- Cup 19 by means of thread BB may be screwed firmly into the end of the ferrule by cooperation with the thread I3 on the ferrule 3.
- the end wall- 99 of the .metallic cup 19 is extended outwardly to have an external diameter greaterathanthe diameter of the adjacent ferrule 3 and the 'peripheralsurface is knurledas: shown most clearly in Fig. l at.
- This lmurling not only provides a; convenient and eflicient' means 'forassemblingthe parts, but it also serves as anindicator sothat one about to take-thefuse apartknows that' the thread is at that end wherethe'knurling
- the nuts, as 49 merelyhave to beloosened and the fuse strip is so formed that its ends may be slipped thereunder, and then the nuts, as; are
- Venting is also provided for in the two vents as 69 and H at the right hand end of the fuse.
- and 93 provide good release. In addition, however, there is always venting through the associated screw-threads l3 and 89 and for this reason, a space is provided at I03 so that good escape is provided as soon as the hot gases and metal vapor have traversed the threads I3 and 89.
- strip carrier and knife blade assemly, including, in combination, aspacer bar of insulating. material, two metallic knife blades,
- each knife blade formed of two;rectangular;,portions, one
- each tangand each butt-plate. alsoformedwhh ,a through bore aligning withthe through bores at each endof the spacer bar respectively, two screw threaded bolts, one. positioned in ,each of the through bores of thespacer bar and, passing through atang e1id-and,.a
- a metallic cupshaped .member positioned on one tang betweenthe adjacent shoulder-and the adjacent spacer bar end, said metallic cup formed with a, ,slot therethrough receiving the tang 'endgwith an external shoulder adapted for contact with aninternal shoulder of a cartridge end ferrule andywlth a knurled outer periphery of a diameter adapted to make a close fit in a cartridge'end ferrule internal bore adjacent inwardly of the, said. in-
- Said s metallic cup further formed with vent, bores therethrough and aqmetallic washerfor ned with a through'slot positioned on the tan ,btween the metallic cup and the end of the spacer bar covering the said vent bores and means on the other tang for securing the assembly in a cartridge with the metallic cup pressed tightly against the said internal shoulder of an end ferrule.
- a fuse strip carrier and knife lade assembly including, in combination, a spacer bar for insulating material, two metallic knife blades, one at each end of the spacer bar, each knife blade formed of two rectangular portions, one narrower than the other forming tang end and a shoulder, one tang end lapping over one end of the spacer bar and the other tang end la ng over the other end of the spacer inetallic butt plates, one at each end of the spacer bar interposed between the tang end of a knife blade and the spacer bar, each butt plate formed with a flat plate portion contacting a tang end on one side and the spacer bar on the other, said butt plates each having two angle portions, one at each end, one right angle portion directed in one direction and the other right angle portion in an opposite direction, one right angle portion on one butt plate abutting the end of the spacer bar and the other right angle portion on the same butt plate abutting the end of a tang, two rivets, one adjacent each end of the spacer each
- a fuse strip carrier knife blade including, in combination, a spacer bar of insulating material, two metallic knife blades, one at each end of the spacer bar, each knife blade formed of two rectangular portions, one narrower than the other forming a tang end and a shoulder, one tang end lapping over one end of the spacer bar and the other tang end lapping over the other end of the spacer bar, metallic butt plates, one at each end of the spacer bar interposed between the tan end of the spacer bar interposed between the tan" end knife blade and the spacer bar, each butt plate formed with a flat plate portion contacting a tang end on one side and the spacer bar on the other, said butt plates each having two right angle portions, one at each end, one right angle portion directed in one direction and the other right an le portion in an opposite direction, one right angle por tion on one butt plate abutting the end of the spacer bar and the other right angle portion on the same butt plate abutting the end of tang
- a fuse strip carrier and knife blade assembly including, in combination, a spacer bar of insulating material, two metallic knife blades, one at each end of the spacer bar, each knife blade formed of two rectangular portions one narrower than the other forming a tang end a shoulder, one tang end lapping over one end of the spacer bar and the other tang end lapping over the other end of the spacer bar, metallic butt plates, one at each end of the spacer bar interposed between the tang end of a knife blade and the spacer bar, each butt plate formed with a flat plate portion contacting a tang end on one side and the spacer bar on the other, said butt plates each having two right angle portions, one at each end, one right angle portion directed in one direction, and the other right angle portion in an opposite direction, one right angle portion on one butt plate abutting the end of the spacer bar and the other right angle portion on the same butt plate abutting the end of a tang, two rivets, one adjacent each end of the spacer bar,
Description
Patented Dec. 8, 1953 UNITED STATES ATENT OFFICE 4 Claims.
This invention relates to electric circuit breakers, particularly thermal circuit breakers and more especially to fusible element thermal breakers.
A principal object of this invention is to provide a knife blade cartridge fuse which is so constructed that all current carrying parts are associated in one assembly which may be inserted in and withdrawn as a whole from a cartridge provided with metallic end ferrules without the use of end ferrule caps.
A further object of the invention is the construction of a cartridge fuse of the kind specified which includes an insulating stationary bar for separating knife blades which includes means for preventing undue wear upon the end surfaces of the spacer bar.
Other objects and advantages will appear as the description of the particular physical en1bodiment selected to illustrate the invention progresses and the novel features will be particularly pointed out in the appended claims.
In describing the invention in detail and the particular physical embodiment selected to illustrate the invention, reference will be had to the accompanying drawings and the several views thereon, in which like characters of reference designate like parts throughout the several views, and in which:
Figure 1 is a side elevational view of a knife blade cartridge fuse embodying my invention; Fig. 2 is a cross sectional view of the device as shown by Fig. l on a plane parallel to the broad faces of the knife blades; Fig. 3 is a cross section of the device of Fig. 1 on a plane at a right angle to the plane upon which Fig. 2 is taken; Fig. 4 is a cross section of the device of Fig. l in a plane parallel to the broad faces of the knife blades but viewed in a direction 180 from the direction in which Fig. 2 is viewed.
My improved knife blade fuse includes a cartridge I of insulating material, preferably horn fibre.
My invention utilizes two metallic end ferrules, one on each end of the cartridge I, as 3 and 5. These end ferrules may be made of any suitable or appropriate metal, preferably brass. They may be attached to the cartridge I in any suitable or preferred manner. I have illustrated them as secured by matching threads, as l, and with the additional security of a threaded screw 9 passing through the ferrule and into the material of the cartridge I. Of course, I do not mean to exclude by the use of a screw 9, the use of a through rivet headed on both ends. I do not mean to exclude by the showing the use of an unthreaded cap.
The ferrule 5 is provided with an internal shoulder Ii. The ferrule 3 is provided with an internal thread I3.
All of the other parts of my fuse are embraced Within What I call the knife blade assembly which includes two knife blades, one It at one end and the other ii at the other end.
The knife blade assembly includes a stationary bar l9 of insulating material. This may well be made of harm fibre.
At each end of the spacer bar it I provide a butt plate as 2! and .23. Each of these butt plates has a fiat plate-like portion as 25 and right angle extensions at each end, as 21 and 23. The right angle extension 2i seats on the end of the spacer bar. The right angle extension 29 seats on the end of a knife blade. Each of the butt plates is firmly attached to the stationary bar It by through rivets, as 3| and 33.
Each of the knife blades embraces two rectangular portions. Knife blade I5 has the rectangular portions 35 and the tang end portion 3'1. As one end of the knife blade is a tang end portion, the butt plates, as 2 I, are interposed between the tang ends of the knife blades and the spacer bar E9, and the right angle portion, as 29, bears against the end of a tang end.
The spacer bar, the butt plates and the tang ends are each formed with through bores, as 331 and 4 I. Within the through bores, there are positioned threaded bolts 53 and 45. The threaded bolts are each provided with a washer, as a? and a nut, as it. By means of the bolts t3 and #15 and the nuts and washers as 4'! and 39, the fusible link 5| is positioned spanning the tang ends of the knife blades and is held securely in position by the nuts and washers so that a firm unitary selfassembly is made of the spacer bar IS, the butt plates 2| and 23, the knife blades i5 and fl, fusible link 5| and the bolts and it together with their washers, as ll and nuts, as it.
On knife blade i5 between the shoulders 53 and 55 and the right angle portion 2? of the butt plate 2| is positioned a metallic cup 571. This metallic cup 5? is formed with a shoulder 59 to cooperate with the shoulder I I of the ferrule 5 and with a peripheral surface 6! of an external diameter proper to centralize the metallic cup El in the through orifice 63 of the end ferrule 5. The metallic cup I I is also provided with a peripheral surface 55 which just fits the internal bore 6'! of the end ferrule i. This peripheral surface is covered with cries-cross ridges and depressions, that is, it is knurled. The object of this knurling is to provide a surface which will tend to catch and hold vaporized fusible strip metal.
- end ferrule 3.
- two vents, 9| and 93.
The metallic cup 51 is also provided with through vent bores, as 69 and II. In addition, a metallic washer I3 is provided with a slot 15 embracing the tang 31 and positioned over the vents 69 and II and between the metallic cup 51 and the butt plates, as 2|.
As will be hereinafter more fully described, there are means associated with the other end of the cartridge fuse by which the metallic cup 51 isforced firmly against the shoulder ll of the ferrule 5 and the spacer bar IS) with the butt plate 2| is forced firmly against washer Hi -and washer I3 is forced firmly against therinside of the cup 51.
At the other end of the fuse from knife b1ade- 'ber 81 of the butt plate 23. The metalliccup l9 is provided on a portion of-- its periphery with threads 89 cooperating with'threads IS on the The cup 19 is also provided with The metallic washer 95 is provided with the slot 91 embracing the tang I1 and is. interposed between the metallic cup 19 and the right angle portion 81 of-thebuttplate 23.
From the hereinbefore given descriptionitiwill 'now belapparent that I have provided a: knife blade cartridge fuse in which there are,-ln effect, .two main parts, afusible strip. assembly, and a cartridge. .When'one is to'replace. the fusible strip in such a fuse, there are only two main parts to handle sothat there is no real danger of losing an essential part. Afterthe :fuseistrip assembly has been separated from the=cantridge,
the nuts, as 49, merelyhave to beloosened and the fuse strip is so formed that its ends may be slipped thereunder, and then the nuts, as; are
"tightened so that there is no danger of :losing such small parts.
The provision of the knurled periphery 65 on largely caughtby the knurled surface 65.
Previous v two-piece cartridges have-been. deficient in this respect as it has been leftfor the user to ascertain, by: trial, which direction aparticular'knifeblade should be turned in order to release the knife blade as- .sembly from the cartridge.
Venting is also provided for in the two vents as 69 and H at the right hand end of the fuse.
At the left hand end of the fuse, as viewed in the figures, vents 9| and 93 provide good release. In addition, however, there is always venting through the associated screw-threads l3 and 89 and for this reason, a space is provided at I03 so that good escape is provided as soon as the hot gases and metal vapor have traversed the threads I3 and 89.
It should also be noted that when the fuse is properly assembled, there are spaces showing on each end of the fuse between the metallic cups on each end and the shoulders of the knife -bla'desythat is, the spaces I05 and H11 are clearly evident if the fuse has been properly assembled tightly in position in the cartridge.
- @Although I have particularly described one particular physical embodiment of invention and explained the construction and principle/thereof. nevertheless, I desire to have it understood ;,that the form selected is merely illustrative, but does not exhaust the possible physical embodiments of the idea of means underlying my invention.
What I'claim as new and desire to secure by Letters Patent is:
l. [3. strip carrier and knife blade assemly, including, in combination, aspacer bar of insulating. material, two metallic knife blades,
one at each end of the spacer bar each knife blade formed of two;rectangular;,portions, one
zone side and the spacer .bar on the other /said butt plates eachhavin two right anglelpor tions,
"one at'each end, one right angle portion directed in one direction and the otherright ,anglesportionin an opposite direction, one rightangleportiononone buttplate ,abutting the,.end f1 spacer bar and theotlier right angle portion on ,the; same butt plate abutting; the end of. a tang,
two rivets, one adjacent each end of, the. -spacer bar, eaclrrivet passing, throughetheaspacer bar and a butt plate and attaching -'the, butt ,=plate firmly to-the spacer bar, saidspacer-ba-r formed with two through bores,.one adjacent eachifind,
each tangand each butt-plate. alsoformedwhh ,a through bore aligning withthe through bores at each endof the spacer bar respectively, two screw threaded bolts, one. positioned in ,each of the through bores of thespacer bar and, passing through atang e1id-and,.a|butt,plate twmnuts and two washers, one of each. on each of the bolts whereby afuse link providedwith athrough bore in each end is attached. spanning,. ,the space between tang ends, a metallic cupshaped .member positioned on one tang betweenthe adjacent shoulder-and the adjacent spacer bar end, said metallic cup formed with a, ,slot therethrough receiving the tang 'endgwith an external shoulder adapted for contact with aninternal shoulder of a cartridge end ferrule andywlth a knurled outer periphery of a diameter adapted to make a close fit in a cartridge'end ferrule internal bore adjacent inwardly of the, said. in-
- 'ternal shoulder ofa cartridgeiend ferrule.' Said s metallic cup further formed with vent, bores therethrough and aqmetallic washerfor ned with a through'slot positioned on the tan ,btween the metallic cup and the end of the spacer bar covering the said vent bores and means on the other tang for securing the assembly in a cartridge with the metallic cup pressed tightly against the said internal shoulder of an end ferrule.
2. A fuse strip carrier and knife lade assembly, including, in combination, a spacer bar for insulating material, two metallic knife blades, one at each end of the spacer bar, each knife blade formed of two rectangular portions, one narrower than the other forming tang end and a shoulder, one tang end lapping over one end of the spacer bar and the other tang end la ng over the other end of the spacer inetallic butt plates, one at each end of the spacer bar interposed between the tang end of a knife blade and the spacer bar, each butt plate formed with a flat plate portion contacting a tang end on one side and the spacer bar on the other, said butt plates each having two angle portions, one at each end, one right angle portion directed in one direction and the other right angle portion in an opposite direction, one right angle portion on one butt plate abutting the end of the spacer bar and the other right angle portion on the same butt plate abutting the end of a tang, two rivets, one adjacent each end of the spacer each rivet passing through the spacer bar and a butt plate and attaching the butt plate firmly to the spacer bar, means for positioning and securing the assembly in a cartridge, and means for attaching a fusible link between the tang ends.
3. A fuse strip carrier knife blade bly, including, in combination, a spacer bar of insulating material, two metallic knife blades, one at each end of the spacer bar, each knife blade formed of two rectangular portions, one narrower than the other forming a tang end and a shoulder, one tang end lapping over one end of the spacer bar and the other tang end lapping over the other end of the spacer bar, metallic butt plates, one at each end of the spacer bar interposed between the tan end of the spacer bar interposed between the tan" end knife blade and the spacer bar, each butt plate formed with a flat plate portion contacting a tang end on one side and the spacer bar on the other, said butt plates each having two right angle portions, one at each end, one right angle portion directed in one direction and the other right an le portion in an opposite direction, one right angle por tion on one butt plate abutting the end of the spacer bar and the other right angle portion on the same butt plate abutting the end of tang, two rivets, one adjacent each end of the spacer bar, each rivet passing through the spacer bar and a butt plate and attaching the butt plate firmly to the spacer bar, spacer bar formed with two through bores, one adjacent each end, each tang and each butt plate also formed with a through bore aligning with the through bores at each end of the spacer bar respectively, two screw threaded bolts, one positioned in each of of the through bores of the spacer bar and pass ing throught a tang end and a butt plate, two nuts and two washers, one of each on each of the bolts whereby a fuse link provided with a through bore in each end is attached spanning the space between the tang ends and means for positioning and securing the assembly in a cartridge.
4. A fuse strip carrier and knife blade assembly, including, in combination, a spacer bar of insulating material, two metallic knife blades, one at each end of the spacer bar, each knife blade formed of two rectangular portions one narrower than the other forming a tang end a shoulder, one tang end lapping over one end of the spacer bar and the other tang end lapping over the other end of the spacer bar, metallic butt plates, one at each end of the spacer bar interposed between the tang end of a knife blade and the spacer bar, each butt plate formed with a flat plate portion contacting a tang end on one side and the spacer bar on the other, said butt plates each having two right angle portions, one at each end, one right angle portion directed in one direction, and the other right angle portion in an opposite direction, one right angle portion on one butt plate abutting the end of the spacer bar and the other right angle portion on the same butt plate abutting the end of a tang, two rivets, one adjacent each end of the spacer bar, each rivet passing through the spacer bar and a butt plate and attaching the butt plate firmly to the spacer bar, said spacer bar formed with two through bores, one adjacent each end, each tang and each butt plate also formed with a through bore aligning with the through bores at each end of the spacer bar respectively, two screw threaded bolts, one positioned in each of the through bores of the spacer bar and passing through a tang and a butt plate, two nuts and two washers, one of each on each of the bolts whereby a fuse link provided with a through bore in each end is attached spanning the space between tang ends, a metallic cup formed with a through slot, said slot embracing one of the tang ends between the adjacent butt plate and the adjacent shoulders on the knife blade, said cup formed with a screw thread on a portion of its periphery adapted to engage an internal screw thread in a cartridge fuse end ferrule, said cup further formed with through vent bores, a metallic washer formed with a through slot, said last mentioned slot surrounding the last mentioned tang end and interposed between the cup and the last mentioned butt plate and covering the said vent bores, said cup further formed with an end wall extending beyond the external diameter of said screw threaded portion a distance suiiioient to lie beyond the outer periphery of a cartridge end ferrule with which it is associated, the peripheral portion of the said end wall being knurled whereby a non-slipping hand grip is provided, and means associated with the other tang end for co-operation with a cartridge end ferrule positioned on the opposite end of a cartridge from that with which the said metallic cup cooperates.
LEWIS DETCI-I.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,559,890 La Mar Nov. 3, 1925 2,563,566 Von Hoorn Aug. 7, 1951
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US277687A US2662141A (en) | 1952-03-20 | 1952-03-20 | Cartridge fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US277687A US2662141A (en) | 1952-03-20 | 1952-03-20 | Cartridge fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2662141A true US2662141A (en) | 1953-12-08 |
Family
ID=23061962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US277687A Expired - Lifetime US2662141A (en) | 1952-03-20 | 1952-03-20 | Cartridge fuse |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2662141A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050134423A1 (en) * | 2003-12-20 | 2005-06-23 | Lear Corporation | Mounting Device for Laminated Fuses |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1559890A (en) * | 1921-04-30 | 1925-11-03 | Mar Frank C La | Renewable electric fuse |
| US2563566A (en) * | 1951-08-07 | Spacing device fob renewable fuses |
-
1952
- 1952-03-20 US US277687A patent/US2662141A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2563566A (en) * | 1951-08-07 | Spacing device fob renewable fuses | ||
| US1559890A (en) * | 1921-04-30 | 1925-11-03 | Mar Frank C La | Renewable electric fuse |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050134423A1 (en) * | 2003-12-20 | 2005-06-23 | Lear Corporation | Mounting Device for Laminated Fuses |
| US6985065B2 (en) * | 2003-12-20 | 2006-01-10 | Lear Corporation | Mounting device for laminated fuses |
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