High current- carrying-capacity dual element fuse
阅读：81发布：2021-05-17
专利汇可以提供High current- carrying-capacity dual element fuse专利检索，专利查询，专利分析的服务。并且A dual element fuse intended to carry large currents is provided with a plurality of fuse links for interrupting major fault currents, a spring biased solder joint overload current interrupting switching device being interposed in each of said plurality of fuse links. The overload current interrupting devices are arranged in two spaced planes parallel to the plane defined by the two blade contacts of the fuse. Each of the overload current switching devices includes a fixed terminal and movable terminal both enclosed in a sub-casing of electric insulating material, separating the aforementioned terminals from a body of pulverulent arc-quenching filler. The terminals are arranged in a pattern tending to maximize the spacing between furlgurites resulting from backburn of fuse links beyond the subcasings incident to interruption of overload currents the interruption of which is relatively onerous.，下面是High current- carrying-capacity dual element fuse专利的具体信息内容。
1. An electric dual element high-current-carrying-capacity cartridge fuse including a. a tubular casing of electric insulating material; b. a body of pulverulent arc-quenching filler inside of said casing; c. a pair of terminal caps each closing one of the ends of said casing; d. a pair of blade contacts arranged in a common plane each projecting transversely through one end surface of one of said pair of terminal caps; e. a plurality of perforated ribbon fuse links inside said casing submersed in said body of arc-quenching filler each conductively interconnecting the axially inner ends of said pair of blade contact; f. a plurality of spring biased solder joint overload current interrupting switching devices each interposed into the current path of one of said plurality of ribbon fuse links, said plurality of switching devices forming a first group and a second group of switching devices, the constituent switching devices of said first group being arranged in a first plane substantially parallel to said common plane of said pair of blade contacts and the constituent switching devices of said second group being arranged in a second plane spaced from said first plane substantially parallel to said common plane of said pair of blade contacts; and g. a plurality of sub-casings of electric insulating material inside of said casing equal in number to the number of said switching devices each housing one of said plurality of switching devices and each separating one of said plurality of switching devices from said body of arc-quenching filler, said plurality of sub-casings forming a first group and a second group of sub-casings, the constituent sub-casings of said first group being arranged in a first plane substantially parallel to said common plane of said pair of blade contacts and the constituent sub-casings of said second group being arranged in a second plane spaced from said first plane substantially parallel to said common plane of said pair of blade contacts.
2. An electric fuse as specified in claim 1 wherein a. each of said plurality of switching devices includes a fixed terminal and a spring biased movable terminal; b. said fixed terminal and said movable terminal of contiguous pairs of switching devices of said first group are arranged in axially reverse positions in such a way that the axial spacing between the axially outer ends of the movable terminals of contiguous pairs of switching devices exceeds the axial spacing between the axially inner ends of the fixed terminals of contiguous pairs of switching devices; and wherein c. said fixed terminal and said movable terminal of contiguous switching devices of said second group are arranged in axially reverse positions in such a way that the axial spacing between the axially outer ends of the movable terminals of contiguous pairs of switching devices exceeds the axial spacing between the axially inner ends of the fixed terminals of contiguous pairs of switching devices.
3. An electric fuse as specified in claim 1 wherein a. each of said plurality of switching devices includes a fixed terminal and a movable spring biased terminal; and wherein b. pairs of superimposed switching devices of which one pertains to said first and the other pertains to said second group are arranged in axially reverse positions in such a way that the axial spacing between the axially outer ends of the movable terminals of contiguous pairs of switching devices exceeds the axial spacing between the axially inner ends of the fixed terminals of contiguous pairs of switching devices.
4. An electric fuse as specified in claim 1 wherein a. each of said plurality of switching devices includes a fixed terminal and a spring biased movable terminal; b. said fixed terminal and said movable terminal of contiguous switching devices of said first group are arranged in axially reverse positions in such a way that the axial spacing between the axially outer ends of the movable terminals of contiguous pairs of switching devices exceeds the axial spacing between the axially inner ends of the fixed terminals of contiguous pairs of switching devices; c. said fixed terminal and said movable terminal of the contiguous switching devices of said second group are arranged in axially reverse positions in such a way that the axial spacing between the axially outer ends of the movable terminals of contiguous pairs of switching devices exceeds the axial spacing between the axially inner ends of the fixed terminals of contiguous pairs of switching devices; and wherein d. pairs of superimposed switching devices of which one pertains to said first group and the other pertains to said second group of switching devices are arranged in axially reverse positions in such a way that the axial spacing between the axially outer ends of the movable terminals of contiguous pairs of switching devices exceeds the axial spacing between the axially inner ends of the fixed terminals of contiguous pairs of switching devices.
5. An electric dual element cartridge fuse including a. a tubular casing of insulating material; b. a body of pulverulent arc-quenching filler inside of said casing; c. a pair of terminal caps each closing one of the ends of said casing; d. a pair of blade contacts arranged in a common plane each projecting transversely through the end surface of one of said pair of terminal caps; e. a plurality of ribbon fuse links having serially related points of reduced cross-sectional area, each of said plurality of fuse links including a pair of sections of equal length having axially outer ends conductively connected to the axially inner ends of said pair of blade contacts and axially inner ends forming a gap therebetween; f. a plurality of overload current interrupting switching devices each normally conductively interconnecting said axially inner ends of a pair of sections of said plurality of fuse links, each of said plurality of switching devices including a fixed cylindrical terminal of relatively large diameter having an end surface conductively connected to the axially inner end of one of said sections of one of said plurality of fuse links, each of said plurality of switching devices further including a movable spring biased terminal arranged in coaxial relation to said fixed terminal thereof and having an end surface conductively connected by a solder joint to the axially inner end of one of said sections of one of said plurality of fuse links, said plurality of switching devices forming a first group and a second group of switching devices, the constituent switching devices of said first group being arranged in a first plane substantially parallel to said common plane of said pair of blade contacts and the constituent switching devices of said second group being arranged in a second plane spaced from said first plane and substantially parallel to said common plane of said pair of blade contacts; g. a plurality of substantially tubular sub-casings of electric insulating material arranged inside of said casing in parallel relation to said casing, each of said plurality of sub-casings housing one of said plurality of switching devices and each of said plurality of sub-casings having an end circular in cross-section arranged immediately adjacent said fixed terminal of one of said plurality of switching devices and each of said plurality of switching devices having a squashed and flattened end arranged immediately adjacent said movable terminal of one of said plurality of switching devices; h. said squashed and flattened ends of said sub-casings of contiguous switching devices of said first group of switching devices being arranged in axially reverse positions in such a way that the axial spacing between the squashed and flattened ends of contiguous pairs of switching devices exceeds the axial spacing between the ends circular in cross-section of contiguous pairs of sub-casings; i. said squashed and flattened ends of said sub-casings of contiguous switching devices of said second group of switching devices being arranged in axially reverse positions in such a way that the axial spacing between the squashed and flattened ends of contiguous pairs of switching devices exceeds the axial spacing between the ends circular in cross-section of contiguous pairs of sub-casings; and j. the squashed and flattened ends of said sub-casings of superimposed switching devices of which one pertains to said first group of switching devices and the other pertains to said second group of switching devices being arranged in axially reverse positions in such a way that the spacing between the squashed and flattened ends of the sub-casings of superimposed switching devices exceeds the spacing between the ends circular in cross-section of the sub-casings of superimposed switching devices.
6. An electric fuse including a. a tubular casing of electric insulating material; b. a body of pulverulent arc-quenching filler inside said casing; c. a pair of terminal caps each closing one of the ends of said casing; d. a pair of blade contacts arranged in a common plane each projecting transversely through one end surface of one of said pair of terminal caps; e. a plurality of perforated ribbon fuse links inside said casing submersed in said arc-quenching filler, said plurality of fuse links forming two separate groups of fuse links each arrangEd in one of a pair of parallel planes parallel to said common plane of said pair of blade contacts, said plurality of fuse links having axially outer ends connected to said pair of blade contacts and having axially inner spaced ends; f. a plurality of spring-biased solder joint overload current switching devices each arranged in one of said pair of parallel planes and each normally conductively interconnecting said axially inner spaced ends of said plurality of ribbon fuse links, each of said plurality of switching devices including a fixed non-spring-biased member and a movable spring-biased member; g. a plurality of sub-casings each housing one of said plurality of switching devices and separating each of said plurality of switching devices from said arc-quenching filler; and h. said switching devices being arranged in reverse and in such a way that the axial spacing between the axially outer ends of movable spring-biased members of contiguous pairs of switching devices exceeds the axial spacing between the axially inner ends of fixed non-spring-biased members of contiguous pairs of switching devices.
7. An electric cartridge fuse including a. a tubular casing of electric insulating material; b. a body of pulverulent arc-quenching filler inside said casing; c. a pair of terminal caps each closing one of the ends of said casing; d. a pair of blade contacts arranged in a common plane each projecting transversely through one end surface of one of said pair of terminal caps; e. a plurality of perforated ribbon fuse links inside said casing submersed in said arc-quenching filler, said plurality of fuse links forming two separate groups of fuse links each arranged in one of a pair of parallel planes parallel to said common plane of said pair of blade contacts, said plurality of fuse links having axially outer ends connected to said pair of blade contacts and having axially inner spaced ends; f. a plurality of spring biased solder joint overload current interrupting switching devices each arranged in one of said pair of parallel planes and each normally conductively interconnecting said axially inner spaced ends of said plurality of ribbon fuse links, each of said plurality of switching devices including a first contact fixed relative to said plurality of fuse links and a second contact movable relative to said plurality of fuse links; g. a plurality of sub-casings of electric insulating material inside said casing equal in number to the number of said switching devices each housing one of said plurality of switching devices and each separating one of said plurality of switching devices from said body of arc-quenching filler, each of said plurality of sub-casings having one end circular in cross-section arranged immediately adjacent said first contact of one of said plurality of switching devices and each of said plurality of sub-casings having another end being squashed and flattened arranged immediately adjacent said second contact of one of said plurality of switching devices; and h. contiguous switching devices and said sub-casings thereof being arranged in reverse in such a way that the spacing between said squashed and flattened ends of contiguous said sub-casings exceeds the spacing between said end circular in cross-section of contiguous said sub-casings.
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