Holder for electric fuses

Claim 2

A two-pole ''''in-the-line'''' fuseholder which can hold two cartridge-type electric fuses at the same time and which comprises a first rigid member that has a first generallycylindrical portion and a second generally-cylindrical portion and a bridge portion which are formed as a unit without interfaces therebetween, a first recess within said first generally-cylindrical portion which can accommodate one end of a first cartridge-type electric fuse, a second recess within said second generally-cylindrical portion which can accommodate one end of a second cartridge-type electric fuse, said bridge portion holding said first and said second generally-cylindrical portions fixedly spaced apart with the axes of said first and second recesses parallel, a third recess in said bridge portion which is coaxial with, but which has a larger diameter than, said first recess, said third recess being in communication with, and serving as the entrance for, said first recess, a fourth recess in said bridge portion which is coaxial with, but which has a larger diameter than, said second recess, said fourth recess being in communication with, and serving as the entrance for, said second recess, said bridge portion encircling both said third and said fourth recesses and extending radially outwardly in all directions beyond both said third and said fourth recesses to constitute a sturdy and rugged protection for both said third and said fourth recesses, said bridge portion having a thickness greater than the axial dimension of either said third or said fourth recess and being coextensive with and extending axially beyond both said third and said fourth recesses, a second rigid member that has a third generally-cylindrical portion and a fourth generally-cylindrical portion and a second bridge portion which are formed as a unit without interfaces therebetween, a fifth recess within said third generally-cylindrical portion which can accommodate the other end of said first cartridge-type electric fuse, a sixth recess within said fourth generallycylindrical portion which can accommodate the other end of said second cartridge-type electric fuse, said second bridge portion holding said third and said fourth generally-cylindrical portions fixedly spaced apart with the axes of said fifth and sixth recesses parallel, an annular projection on said second bridge portion which is coaxial with said fifth recess and which extends axially outwardly from said second bridge portion, said annular projection having an outer diameter which is slightly smaller than the diameter of said third recess in the first said bridge portion to enable said annular projection to telescope into said third recess, said annular projection having an inner diameter greater than that of said other end of said first cartridge-type electric fuse, a second annular projection on said second bridge portion which is coaxial with said sixth recess and which extends axially outwardly from said second bridge portion, said second annular projection having an outer diameter which is slightly smaller than the diameter of said fourth recess in said second bridge portion to enable said second annular projection to telescope into said fourth recess, said second annular projection having an inner diameter greater than that of said other end of said second cartridge-type electric fuse, the first said annular projection extending into said third recess and thus into the first said bridge portion whereby said first said bridge portion also surrounds and protects said first said annular projection, said second annular projection extending into said fourth recess and thus into said first said bridge portion whereby said first said bridge portion also surrounds and protects said second annular projection, and a screw which releasably holds said first and said second rigid members in assembled relation.

Claim 3

A two-pole in-the-line fuseholder as claimed in claim 1 wherein said second bridge portion has a shallow annular recess therein which surrounds and is concentric with the first said annular projection on said second bridge portion, wherein a resilient sealing element has a portion thereof disposed within said shallow annular recess but has a further portion thereof extending outwardly from said shallow annular recess to coact with a portion of the first said bridge portion to form a seal, wherein said second bridge portion has a second shallow annular recess therein which surrounds and is concentric with said second annular projection on said second bridge portion, wherein a second resilient sealing element has a portion thereof disposed within said second shallow annular recess but has a further portion thereof extending outwardly from said shallow annular recess to coact with a further portion of said first said bridge portion to form a second seal, and wherein the edges of said first said and said second bridge portions are displaced outwardly relative to the first said and said second sealing means and are disposable in close proximity to each other to protect said first said and said second sealing means.

Claim 4

A two-pole in-the-line fuseholder which can hold two cartridge-type electric fuses at the same time and which comprises a first rigid member that has a first generally-cylindrical portion and a second generally-cylindrical portion and a bridge portion which are formed as a unit without interfaces therebetween, said bridge portion constituting and defining one end of said first rigid member, a first recess within said first generally-cylindrical portion which extends inwardly from said one end of said first rigid member and which extends through said bridge portion and which can accommodate one end of a first cartridge-type electric fuse, a second recess within said second generally-cylindrical portion which extends inwardly from said one end of said first rigid member and which extends through said bridge portion and which can accommodate one end of a second cartridge-type electric fuse, said bridge portion holding said first and said second generally-cylindrical portions fixedly spaced apart with the axes of said first and second recesses parallel, a third recess in said bridge portion which extends inwardly from said one end of said first rigid member and which is coaxial with, but which has a larger diameter than, said first recess, said third recess being in communication with, and serving as the entrance for, said first recess, a fourth recess in said bridge portion which extends inwardly from said one end of said first rigid member and which is coaxial with, but which has a larger diameter than, said second recess, said fourth recess being in communication with, and serving as the entrance for, said second recess, said bridge portion encircling both said third and said fourth recesses and extending radially outwardly in all directions beyond both said third and said fourth recesses to constitute a sturdy and rugged protection for both said third anD said fourth recesses, a second rigid member that has a third generally-cylindrical portion and a fourth generally-cylindrical portion and a second bridge portion which are formed as a unit without interfaces therebetween, a fifth recess within said third generally-cylindrical portion which can accommodate the other end of said first cartridge-type electric fuse, a sixth recess within said fourth generally-cylindrical portion which can accommodate the other end of said second cartridge-type electric fuse, said second bridge portion holding said third and said fourth generally-cylindrical portions fixedly spaced apart with the axes of said fifth and sixth recesses parallel, an annular projection on said second bridge portion which is coaxial with said fifth recess and which extends axially outwardly from said second bridge portion, said annular projection having an outer diameter which is slightly smaller than the diameter of said third recess in the first said bridge portion to enable said annular projection to telescope into said third recess, said annular projection having an inner diameter greater than that of said other end of said first cartridge-type electric fuse, a second annular projection on said second bridge portion which is coaxial with said sixth recess and which extends axially outwardly from said second bridge portion, said second annular projection having an outer diameter which is slightly smaller than the diameter of said fourth recess in said second bridge portion to enable said second annular projection to telescope into said fourth recess, said second annular projection having an inner diameter greater than that of said other end of said second cartridge-type electric fuse, the first said annular projection extending into said third recess and thus into said first said bridge portion whereby said first said bridge portion also surrounds and protects said first said annular projection, said second annular projection extending into said fourth recess and thus into said first said bridge portion whereby said first said bridge portion also surrounds and protects said second annular projection, a screw which releaseably holds said first and said second rigid members in assembled relation, said screw releasably holding said first said and said second bridge portions in abutting relation, and said first said and said second bridge portions coacting, whenever they are in abutting relation, to constitute a rigid plural-section beam which strengthens and rigidifies said two-pole in-the-line fuseholder.

Claim 5

A two-pole in-the-line fuseholder which can hold two cartridge-type electric fuses at the same time and which comprises a first rigid member that has a first generally-cylindrical portion and a second generally-cylindrical portion and a bridge portion which are formed as a unit without interfaces therebetween, said bridge portion constituting and defining one end of said first rigid member, a first recess within said first generally-cylindrical portion which extends inwardly from said one end of said first rigid member and which extends through said bridge portion and which can accommodate one end of a first cartridge-type electric fuse, a second recess within said second generally-cylindrical portion which extends inwardly from said one end of said first rigid member and which extends through said bridge portion and which can accommodate one end of a second cartridge-type electric fuse, said bridge portion holding said first and said second generally-cylindrical portions fixedly spaced apart with the axes of said first and second recesses parallel, a third recess in said bridge portion which extends inwardly from said one end of said first rigid member and which is coaxial with, but which has a larger diameter than, said first recess, said third recess being in communication with, and serving as the entrance for, said first recess, a fourth recess in said bridge portion which extends inwardly from said one end of said first rigid member and which is coaxial with, but which has a larger diameter than, said second recess, said fourth recess being in communication with, and serving as the entrance for, said second recess, said bridge portion encircling both said third and said fourth recesses and extending radially outwardly in all directions beyond both said third and said fourth recesses to constitute a sturdy and rugged protection for both said third anD said fourth recesses, a second rigid member that has a third generally-cylindrical portion and a fourth generally-cylindrical portion and a second bridge portion which are formed as a unit without interfaces therebetween, a fifth recess within said third generally-cylindrical portion which can accommodate the other end of said first cartridge-type electric fuse, a sixth recess within said fourth generally-cylindrical portion which can accommodate the other end of said second cartridge-type electric fuse, said second bridge portion holding said third and said fourth generally-cylindrical portions fixedly spaced apart with the axes of said fifth and sixth recesses parallel, an annular projection on said second bridge portion which is coaxial with said fifth recess and which extends axially outwardly from said second bridge portion, said annular projection having an outer diameter which is slightly smaller than the diameter of said third recess in the first said bridge portion to enable said annular projection to telescope into said third recess, said annular projection having an inner diameter greater than that of said other end of said first cartridge-type electric fuse, a second annular projection on said second bridge portion which is coaxial with said sixth recess and which extends axially outwardly from said second bridge portion, said second annular projection having an outer diameter which is slightly smaller than the diameter of said fourth recess in said second bridge portion to enable said second annular projection to telescope into said fourth recess, said second annular projection having an inner diameter greater than that of said other end of said second cartridge-type electric fuse, the first said annular projection extending into said third recess and thus into said first said bridge portion whereby said first said bridge portion also surrounds and protects said first said annular projection, said second annular projection extending into said fourth recess and thus into said first said bridge portion whereby said first said bridge portion also surrounds and protects said second annular projection, a screw which releaseably holds said first and said second rigid members in assembled relation, said screw releasably holding said first said and said second bridge portions in abutting relation, and said first said and said second bridge portions coacting, whenever they are in abutting relation, to constitute a rigid plural-section beam which strengthens and rigidifies said two-pole in-the-line fuseholder.

Claim 6

A two-pole in-the-line fuseholder which can hold two cartridge-type electric fuses at the same time and which comprises a first member that has a first generally-cylindrical portion and a second generallycylindrical portion and a bridge portion which are formed as a unit without interfaces therebetween, said bridge portion constituting and defining one end of said first member, a first recess within said first generally-cylindrical portion which extends inwardly from said one end of said first member and which extends through said bridge portion and which can accommodate one end of a first cartridge-type electric fuse, a second recess within said second generally-cylindrical portion which extends inwardly from said one end of said first member and which extends through said bridge portion and which can accommodate one end of a second cartridge-type electric fuse, said bridge portion holding said first and said second generally-cylindrical portions spaced apart, a third recess in said bridge portion which extends inwardly from said one end of said first member and which is coaxial with, but which has a larger diameter than, said first recess, said third recess being in communication with, and serving as the entrance for, said first recess, a fourth recess in said bridge portion which extends inwardly from said one end of said first member and which is coaxial with, but which has a larger diameter than, said second recess, said fourth recess being in coMmunication with, and serving as the entrance for, said second recess, said bridge portion encircling both said third and said fourth recesses and extending radially outwardly in all directions beyond both said third and said fourth recesses to constitute a sturdy and rugged protection for both said third and said fourth recesses, a second member that has a third generally-cylindrical portion and a fourth generally-cylindrical portion and a second bridge portion which are formed as a unit without interfaces therebetween, a fifth recess within said third generally-cylindrical portion which can accommodate the other end of said first cartridge-type electric fuse, a sixth recess within said fourth generally-cylindrical portion which can accommodate the other end of said second cartridge-type electric fuse, said second bridge portion holding said third and said fourth generally-cylindrical portions spaced apart, an annular projection on said second bridge portion which is coaxial with said fifth recess and which extends axially outwardly from said second bridge portion, said annular projection having an outer diameter which is slightly smaller than the diameter of said third recess in the first said bridge portion to enable said annular projection to telescope into said third recess, said annular projection having an inner diameter greater than that of said other end of said first cartridge-type electric fuse, a second annular projection on said second bridge portion which is coaxial with said sixth recess and which extends axially outwardly from said second bridge portion, said second annular projection having an outer diameter which is slightly smaller than the diameter of said fourth recess in said second bridge portion to enable said second annular projection to telescope into said fourth recess, said second annular projection having an inner diameter greater than that of said other end of said second cartridge-type electric fuse, the first said annular projection extending into said third recess and thus into the first said bridge portion whereby said first said bridge portion also surrounds and protects said first said annular projection, said second annular projection extending into said fourth recess and thus into said first said bridge portion whereby said first bridge portion also surrounds and protects said second annular projection, a screw which releasably holds said first said bridge portion in confronting relation and immediately adjacent said second bridge portion, said screw being carried by one of said bridge portions and the other of said bridge portions having a threaded socket therein to accommodate the shank of said screw, and said other of said bridge portions having an unthreaded larger diameter passage through which said shank of said screw must pass to enter said threaded socket.

Claim 7

A two-pole in-the-line fuseholder which can hold two cartridge-type electric fuses at the same time and which comprises a first member that has a first generally-cylindrical portion and a second generallycylindrical portion and a bridge portion which are formed as a unit without interfaces therebetween, said bridge portion constituting and defining one end of said first member, a first recess within said first generally-cylindrical portion which extends inwardly from said one end of said first member and which extends through said bridge portion and which can accommodate one end of a first cartridge-type electric fuse, a second recess within said second generally-cylindrical portion which extends inwardly from said one end of said first member and which extends through said bridge portion and which can accommodate one end of a second cartridge-type electric fuse, said bridge portion holding said first and said second generally-cylindrical portions spaced apart, a third recess in said bridge portion which extends inwardly from said one end of said first member and which is coaxial with, but which has a larger diameter than, said first recess, said third recess being in communication with, and serving as the entrance for, said first recess, a fourth recess in said bridge portion which extends inwardly from said one end of said first member and which is coaxial with, but which has a larger diameter than, said second recess, said fourth recess being in coMmunication with, and serving as the entrance for, said second recess, said bridge portion encircling both said third and said fourth recesses and extending radially outwardly in all directions beyond both said third and said fourth recesses to constitute a sturdy and rugged protection for both said third and said fourth recesses, a second member that has a third generally-cylindrical portion and a fourth generally-cylindrical portion and a second bridge portion which are formed as a unit without interfaces therebetween, a fifth recess within said third generally-cylindrical portion which can accommodate the other end of said first cartridge-type electric fuse, a sixth recess within said fourth generally-cylindrical portion which can accommodate the other end of said second cartridge-type electric fuse, said second bridge portion holding said third and said fourth generally-cylindrical portions spaced apart, an annular projection on said second bridge portion which is coaxial with said fifth recess and which extends axially outwardly from said second bridge portion, said annular projection having an outer diameter which is slightly smaller than the diameter of said third recess in the first said bridge portion to enable said annular projection to telescope into said third recess, said annular projection having an inner diameter greater than that of said other end of said first cartridge-type electric fuse, a second annular projection on said second bridge portion which is coaxial with said sixth recess and which extends axially outwardly from said second bridge portion, said second annular projection having an outer diameter which is slightly smaller than the diameter of said fourth recess in said second bridge portion to enable said second annular projection to telescope into said fourth recess, said second annular projection having an inner diameter greater than that of said other end of said second cartridge-type electric fuse, the first said annular projection extending into said third recess and thus into the first said bridge portion whereby said first said bridge portion also surrounds and protects said first said annular projection, said second annular projection extending into said fourth recess and thus into said first said bridge portion whereby said first bridge portion also surrounds and protects said second annular projection, a screw which releasably holds said first said bridge portion in confronting relation and immediately adjacent said second bridge portion, said screw being carried by one of said bridge portions and the other of said bridge portions having a threaded socket therein to accommodate the shank of said screw, and said other of said bridge portions having an unthreaded larger diameter passage through which said shank of said screw must pass to enter said threaded socket.

Claim 8

A two-pole in-the-line fuseholder which can hold two cartridge-type electric fuses at the same time and which comprises a first member that has a first generally-cylindrical portion and a second generally-cylindrical portion and a bridge portion, said bridge portion constituting and defining one end of said first member, a first recess within said first generally-cylindrical portion which extends inwardly from said one end of said first member and which extends through said bridge portion and which can accommodate one end of a first cartridge-type electric fuse, a second recess within said second generally-cylindrical portion which extends inwardly from said one end of said first member and which extends through said bridge portion and which can accommodate one end of a second cartridge-type electric fuse, said bridge portion holding said first and said second generally-cylindrical portions spaced apart, a third recess in said bridge portion which extends inwardly from said one end of said first member and which is coaxial with, but which has a larger diameter than, said first recess, said third recess being in communication with, and serving as the entrance for, said firSt recess, a fourth recess in said bridge portion which extends inwardly from said one end of said first member and which is coaxial with, but which has a larger diameter than, said second recess, said fourth recess being in communication with, and serving as the entrance for, said second recess, said bridge portion encircling both said third and said fourth recesses and extending radially outwardly in all directions beyond both said third and said fourth recesses to constitute a sturdy and rugged protection for both said third and said fourth recesses, a second member that has a third generally-cylindrical portion and a fourth generally-cylindrical portion and a second bridge portion, a fifth recess within said third generally-cylindrical portion which can accommodate the other end of said first cartridge-type electric fuse, a sixth recess within said fourth generally-cylindrical portion which can accommodate the other end of said second cartridge-type electric fuse, said second bridge portion holding said third and said fourth generallycylindrical portions spaced apart, an annular projection on said second bridge portion which is coaxial with said fifth recess and which extends outwardly from said second bridge portion, said annular projection having an outer diameter which is slightly smaller than the diameter of said third recess in the first said bridge portion to enable said annular projection to telescope into said third recess, said annular projection having an inner diameter greater than that of said other end of said first cartridge-type electric fuse, a second annular projection on said second bridge portion which is coaxial with said sixth recess and which extends outwardly from said second bridge portion, said second annular projection having an outer diameter which is slightly smaller than the diameter of said fourth recess in said second bridge portion to enable said second annular projection to telescope into said fourth recess, said second annular projection having an inner diameter greater than that of said other end of said second cartridge-type electric fuse, a screw which releasably holds said first said bridge portion in confronting relation with and immediately adjacent said second bridge portion, the first said annular projection being telescoped within said third recess in said first said bridge portion and said second annular projection being telescoped into said fourth recess in said second bridge portion whenever said first said and said second bridge portions are held in confronting relation with and immediately adjacent each other, whereby said first said bridge portion also surrounds and protects said first said and said second annular projections, both of said bridge portions and all of said generally-cylindrical portions having exterior surfaces which are devoid of metal, said screw being made of non-metallic material, and said bridge portions coacting to enclose and protect the central portion of the shank of said screw.

Claim 9

A two-pole in-the-line fuseholder which can hold two cartridge-type electric fuses at the same time and which comprises a first member that has a first generally-cylindrical portion and a second generally-cylindrical portion and a bridge portion, said bridge portion constituting and defining one end of said first member, a first recess within said first generally-cylindrical portion which extends inwardly from said one end of said first member and which extends through said bridge portion and which can accommodate one end of a first cartridge-type electric fuse, a second recess within said second generally-cylindrical portion which extends inwardly from said one end of said first member and which extends through said bridge portion and which can accommodate one end of a second cartridge-type electric fuse, said bridge portion holding said first and said second generally-cylindrical portions spaced apart, a third recess in said bridge portion which extends inwardly from said one end of said first member and which is coaxial with, but which has a larger diameter than, said first recess, said third recess being in communication with, and serving as the entrance for, said firSt recess, a fourth recess in said bridge portion which extends inwardly from said one end of said first member and which is coaxial with, but which has a larger diameter than, said second recess, said fourth recess being in communication with, and serving as the entrance for, said second recess, said bridge portion encircling both said third and said fourth recesses and extending radially outwardly in all directions beyond both said third and said fourth recesses to constitute a sturdy and rugged protection for both said third and said fourth recesses, a second member that has a third generally-cylindrical portion and a fourth generally-cylindrical portion and a second bridge portion, a fifth recess within said third generally-cylindrical portion which can accommodate the other end of said first cartridge-type electric fuse, a sixth recess within said fourth generally-cylindrical portion which can accommodate the other end of said second cartridge-type electric fuse, said second bridge portion holding said third and said fourth generallycylindrical portions spaced apart, an annular projection on said second bridge portion which is coaxial with said fifth recess and which extends outwardly from said second bridge portion, said annular projection having an outer diameter which is slightly smaller than the diameter of said third recess in the first said bridge portion to enable said annular projection to telescope into said third recess, said annular projection having an inner diameter greater than that of said other end of said first cartridge-type electric fuse, a second annular projection on said second bridge portion which is coaxial with said sixth recess and which extends outwardly from said second bridge portion, said second annular projection having an outer diameter which is slightly smaller than the diameter of said fourth recess in said second bridge portion to enable said second annular projection to telescope into said fourth recess, said second annular projection having an inner diameter greater than that of said other end of said second cartridge-type electric fuse, a screw which releasably holds said first said bridge portion in confronting relation with and immediately adjacent said second bridge portion, the first said annular projection being telescoped within said third recess in said first said bridge portion and said second annular projection being telescoped into said fourth recess in said second bridge portion whenever said first said and said second bridge portions are held in confronting relation with and immediately adjacent each other, whereby said first said bridge portion also surrounds and protects said first said and said second annular projections, both of said bridge portions and all of said generally-cylindrical portions having exterior surfaces which are devoid of metal, said screw being made of non-metallic material, and said bridge portions coacting to enclose and protect the central portion of the shank of said screw.