CA1172672A - Fuseholders - Google Patents
FuseholdersInfo
- Publication number
- CA1172672A CA1172672A CA000409560A CA409560A CA1172672A CA 1172672 A CA1172672 A CA 1172672A CA 000409560 A CA000409560 A CA 000409560A CA 409560 A CA409560 A CA 409560A CA 1172672 A CA1172672 A CA 1172672A
- Authority
- CA
- Canada
- Prior art keywords
- fuseholder
- carrier
- fuselink
- base
- fuse carrier
- 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
Links
Abstract
ABSTRACT
The invention provides a contactless fuse carrier 11 for a blade-contact cartridge-type fuse-link 17, formed as a single moulding having an elongate body 12 from one side of which a spaced-apart pair of legs 13 and 14 project, one leg 13 having a slot 15 through which one blade 18 of the fuse-link is inserted and the other having a lateral recess 16 into which the other blade 19 is then pushed, transversely of the carrier, to position the fuselink with its cartridge 20 housed between the legs of the carrier and its contact blades projecting beyond the legs and thereby exposed for insertion into fixed contacts 31, 32 as the carrier legs are pushed into the fuseholder base 25.
Preferably, the fuse carrier is formed with a lug or tongue 21 which hinders, but does not prevent, transverse movement of the second blade 19 of the fuselink into (and more especially out of) the lateral recess 16 in the second leg 14 of the carrier.
The invention provides a contactless fuse carrier 11 for a blade-contact cartridge-type fuse-link 17, formed as a single moulding having an elongate body 12 from one side of which a spaced-apart pair of legs 13 and 14 project, one leg 13 having a slot 15 through which one blade 18 of the fuse-link is inserted and the other having a lateral recess 16 into which the other blade 19 is then pushed, transversely of the carrier, to position the fuselink with its cartridge 20 housed between the legs of the carrier and its contact blades projecting beyond the legs and thereby exposed for insertion into fixed contacts 31, 32 as the carrier legs are pushed into the fuseholder base 25.
Preferably, the fuse carrier is formed with a lug or tongue 21 which hinders, but does not prevent, transverse movement of the second blade 19 of the fuselink into (and more especially out of) the lateral recess 16 in the second leg 14 of the carrier.
Description
~f~ 6~12
-2--This invention relates to fuseholders for blade-contact cartridge type fuselinks.
A fuseholder for such fuselinks co~monly comprises a fuseholder base, having dispo~,ed within it a pair of fixed ~erminal blocks, and a fuselink carrier having a pair of spring-clip contacts which are adapted to receive and frictionally retain the contact blades of a fuselink fitted thereto and which are themselves, on insertion of the carrier into the base, frictionally received by the terminal blocks of the base so as to retain the inserted carrier and connect the terminal blocks electrically each to a respective one of the contact blades of the fuselink~
It has been proposed9 in UK patent specification No. 1477591~ to provide the base of such a fuseholder with terminals which are themselves adapted to receive and engage directly the contact blades of the fuse-link~ and to provide; in association with such base~ a fuselink carrier which does not itself include any electrical contacts for the fuselink but which enables the fuselink to be inserted into the base and there offered up to the terminals thereof in proper relation-ship to such terminals 30 a~ to be enOaged directly thereby and frictionally retained. Such a fusehvlder has the advantages of a reduced number of electricall~
conductive parts and a reduction also in the number o~
surface-to-surface electrical contacts which its use introduces in series with the fuselink in a circuit in which it is fitted. However, the contactless fuse-~0 liik carrier proposed by the said specification is a relatively cumbersome two-part assembly, comprising a handle p~rt and a cradle into which a fuselink is fitted before the cradle and handle part are assembled together.
It is an obaect of the present invention to provide an improved contactless fuse carrier for a blade-contact cartridge-type fuselinkJ and to provi.de a fuseholder which comprises such a fuse carrier and a co-operating fuseholder base adapted to receive the fuse carrier and a fuselink carr;ed thereby.
According to the inventlon there is provided a fuse carrier for a blade-contact cartridge-type fuse-link, comprising an elongate body portion and first and second legs projecting from the body portion on one side thereof, spaced apart from one another and from respective opposite ends of the body portion in the lengthwise direction of the body portion and each extending, generally parallel with one another, across the body portion transversely thereof, the first leg being pierced in the lengthwise direction of the body portion by an elongate slot which extends in the direction in which the legs project and the second leg having a lateral recess.
In use of this fuse carrier according to the invention, a first contact blade of a suitable fuselink is inserted through the slot in the first leg of the carrier and then the other, second, contact blade i5 pushed, transversely of the carrier, 50 that it is received in the recess of the second leg while the aartridge section of the fuselink is accommodated between the two legs with. the cartridge at least approximately aligned with the lengthwise direction of the carrier and the contact blades projecting, in that direction, beyond the first and second legs respectively.
Thus the invention further provides a fuse carrier as specified in the last but one preceding paragraph and fitted with a blade-contact ~: cartridge-type fuselink, the fuselink having its cartridge section accommodated between the two legs of the carrier and having a first contact blade inserted through the slot in the first leg of the carrier and a second contact blade received in the recess of the second leg, ,,';ll j ', I. 17~7~
with the first and second contact blade~ extending beyond the first and second legs, respect.ively7 of the carrier.
Preferably, the fuse carrier according to the inven.tion is formed with a lug or tongue which hinders, but does not prevent~ transverse movement of a fuselink second contact blade into (and more especially out of) the lateral recess of the second leg of the carrier, and with abutments which engage against respective ends of a fuselink cartridge section accommodated bet~een the fuse carrier legs, so that it is the abutments~
rather than the peripheries of the slot and of the lateral recessj-by which thrust forces are transmitted from the fuse carrier to the fuselink as these are inserted together into a co-operating fuseholder base.
: The invention, in another of its aspects, : provides a fuseholder comprising a fuse carrier as described in any of the four last preceding paragraphs : and a fuseholder ~ase adapted to receive as a legs-first ~ 20 push fit the fuse carrier and a fuselink fitted thereto, :: the fuseholder base being provided with apair of fixed contacts positioned to receive and co-operate with the respective blade contacts of such fuselink as the fuse ; carrier is fit-ted to the fuseholder base.
~he invention in its various aspects will be more fully understood from the following description of preferred embodiments thereof with reference to the accompanying drawings, in which:-~igure 1 is a perspective view of a fuse carrier according to the invention, Figure 2 is a perspective view of the fuse carrier shown in ~igure 1~ fitted with a blade-contact cartridge-type fuselink;
Figure 3 is a longitudinal section of the fuse-carrier~ taken on the plane III - III o~ ~igure 1;
Figure 4 is a transverse sectional view taken on the line IV - IV of ~igure 3;
~2~7 ~ igure 5 is a longitudinal sectional view of the fusecarrier shown in Figures 1 to 4 and of a fuse-holder base in which it is shown inserted;
Fi~ire 6 is a transverse sectional view through the fusecarrier and fuseholder base~ taken on the line VI - VI of Figure 5; and Figure 7 is a perspective view of one of two terminal shrouds of the fuseholder base shown in ~igures 5 and 60 As shown in ~igure 1~ a fuse carrier 11 according to the invention, which may be formed as a one-piece plastics moulding, has an elongate and generally rectangular body portion 12 from one side of which project first and second legs 13 and 14 which are spaced apart from one another in the lengthwise direction of the bod~ portion 12 and which extend, generally parallel with one another~ across the body portion 123 trans-versely thereof.
~he first leg 1~ is pierced, in the lengthwise direction of the body portion 12, by a slot 15 which extends in the direction i~ which the legs project, and the second leg 14 is formed with a lateral recess 16 As shown in Figuxe 2, this enables a suitable blade contact cartridge-type fuselink 17 ko be fitted to the fusecarrier 11 by first inserting a first contact blade 18 of the fuseliDk 17 through the slot 15 and then ~ : pushing the other, second, contact blade 19 of the fuse-: link transversely of the fusecarrier 50 that it is received in the recess 16 while the cartridge section : ~0 20 of the fuselink is accommodated, between the two : legs 1~ and 14~ at least approximately in alignment with ~ the lengthwise direction of the fuse carrier 11 (in : which direction the contact blade~ 18 and 19 project clear of the legs 13 and 14 respectively).
~5 Preferably, aQd as shown, the fusecarrier 11 is provided with a pro~ecting lug or tongue 21 which ~-6--hinders, but does not prevent, transverse movement of the contact blade 19 into and out of the recess 16.
~he tongue 21 may be slightly flexible at i-ts end, and away from its end it may be sti.ffened by integ.ral buttresses 22. Preferably, also~ the fuse carrier is formed with a pair of abutments 23 which, on insertion of the fuse carrier 11 and fuselink 17 together into a fuseholder base (as described below)~ transmit thrust forces from the fuse carrier to end caps 20' of the cartridge section 20 of the fuselink.
~ he contact blades 18 and 19 of the fuse 20 lie in parallel planes spaced equally on opposite sides of a diametral plane of the cartridge section 20 which îs parallel to both~ and correspondingly the slot 15 in the fuse carrier first leg 1~ and the position loosely defined for the contact blade 19 b~ the tongue 21 and the recess 16 i~ the fuse carrier second leg 14 are both offset on opposite sides of a longitudinal median plane of the fuse carrier~
- Some of the details of the fuse carrier 11 are more precisely represented in ~igures 3 and 4g which also show a small part-cylindrical projection or boss 24 not visible in ~igures 1 and 2 ~ut formed on the leg 14 and engaged b~ the blade 19 (shown in broken line in ~; ~ 25 ~igure 4) as the blade is pushed past the tongue 21~
~he combination of the tongue 21~ the boss 24, a slight obliquity of the limiting edge of the recess 16, and a slight looseness of the fit of the fuselink contact : blade 18 in the sIot 15 enable the fuse carrier to accept and retain a variety o~ fuselinks which, though nominally identical, may have small dimen~ional differ-ences because9 for example9 they may be ~he products of : different manufacturers. ~igures 3 and 4 also show the leg 14 providedq optionally~ with a stiffening or strengthening web 14' which is not shown in ~igures 1 and ~
2 ~ ~ 2 ~7--~ igures 5 and 6 show the fuse carrier 11 and fuselink 17 inserted into a nlseholder base 25 which has the general form of an open box with a base portion 26, end walls 27 and side walls 28. ~he body portion 12 of the fuse carrier 11 serves as a closure for the box-form base 25, and has a rectangular skirt 29 which enters as a close clearance fit between the base walls 27 and 28O The skirt 29 is formed with two proj ecting ribs 30 (See ~igures 1 and 2) which frictionally engage the opposed side walls 2~ of the base to retain the fusecarrier in its inserted position even if it has ; no fuselink 17 fitted.
~ he base 25 is fitted with a pair of fixed contacts constituted by first and second terminal 15 blocks 31 and 32 each secured, together with a respec- -tive springy contact stirrup 33 (see ~igure ~), to the base 25 by means of a respective securing screw 34 whose head is shrouded b~ a subsequently fitted insulating ; disc 35O ~he base end walls 27 have apertures 36 each : 20 aligned with a bore 37 in the respective contact block 31 or ~2 for insertion of a respective electrical con-ductor (not shown) whose end is then clamped by a res-:pective clamping screw (not shown) screwed into a ~-threaded bore 38 of the contact block 31 or 32. Each ~::
contact block 31 or 32 and its associated stirrup 33 : : :is positioned to receive, as shown in Figure 6, a contact blade 18 or 19 respectively of a ~uselink 17 when the fusecarrier 11, with the fuselink 17 fitted as shown in Figure 2, is inserted into the fuseholder :30 base 25.
:~he fuseholder base, which is formed with a ;central boss 39 and fixing hole ~0 by means of which it can be mounted for use, is fitted with a pair of ~:insulating shrouds 41 ~of which one is shown in per-spective in ~igure 7) which shroud the contact blocks 31 ~:
.
~, . 17~672 and 32 and their stirrups 33 against accidental contact while the fusecarr;er 11 is removed~ Each end wall 27 of the fuseholder base has a bore 42 to receive a spigot 43 of a respective one of the shrouds 41 as the shroud is pushed into place as shown in Figures 5 and 6. Preferably, the shroud is of somewhat resilient material and its spigot and the bore 42 are profiled so that the spigot enters the bore as a snap fit; and preferably9 then, each shroud is formed with a small recess 44, adjacent its spigot, into which the end of a screw-driver can be inserted and then turned (to bear against the adjacent wall 27 of the fuseholder base) to withdraw the spigot from its bore 42 when it is required to remove the shroud, for example to gain access to the clamping screw in the bore 38 of the shroud ed contact block. ~he need to use a tool when removing the shrouds, even thou~h they can be fitted manually into the fuseholder base, is a use~ul safety feature which assists in discouraging casual or thoughtless tampering.
~ ach shroud 41 has a slot 45 to accept the passage of the fuselink blade contact 18 or 19 as it is inserted towards and between the respective contact block 31 or 32 and its stirrup 33, and is recessed at i~ ~J
46 to give clearance for the end of the tongue 21 of : the ~usecarrier. ~ach shroud 41 is also formed with a projecting parti46 which co-operates with a corresponding-ly recessed zone 47 or 48 of the fuse carrier legs 13 : and 14 respectively and helps to guide and position the ~0 fusecarrier correctly as it is inserted into the fuse-holder base~
: It will be understood that many of the details described above may be altered within the scope of the ~n~e~tion~ but that any embodiment of the in~ention ~5 provides ~ very convenient one-part contactless fuse 2~2 _9 ; c~rrier for a blade-contact cartridge type fuse and an : improved fuseholder comprising ir. combi~ation such a fuse carrier and a suitable fuseholder base~
.
A fuseholder for such fuselinks co~monly comprises a fuseholder base, having dispo~,ed within it a pair of fixed ~erminal blocks, and a fuselink carrier having a pair of spring-clip contacts which are adapted to receive and frictionally retain the contact blades of a fuselink fitted thereto and which are themselves, on insertion of the carrier into the base, frictionally received by the terminal blocks of the base so as to retain the inserted carrier and connect the terminal blocks electrically each to a respective one of the contact blades of the fuselink~
It has been proposed9 in UK patent specification No. 1477591~ to provide the base of such a fuseholder with terminals which are themselves adapted to receive and engage directly the contact blades of the fuse-link~ and to provide; in association with such base~ a fuselink carrier which does not itself include any electrical contacts for the fuselink but which enables the fuselink to be inserted into the base and there offered up to the terminals thereof in proper relation-ship to such terminals 30 a~ to be enOaged directly thereby and frictionally retained. Such a fusehvlder has the advantages of a reduced number of electricall~
conductive parts and a reduction also in the number o~
surface-to-surface electrical contacts which its use introduces in series with the fuselink in a circuit in which it is fitted. However, the contactless fuse-~0 liik carrier proposed by the said specification is a relatively cumbersome two-part assembly, comprising a handle p~rt and a cradle into which a fuselink is fitted before the cradle and handle part are assembled together.
It is an obaect of the present invention to provide an improved contactless fuse carrier for a blade-contact cartridge-type fuselinkJ and to provi.de a fuseholder which comprises such a fuse carrier and a co-operating fuseholder base adapted to receive the fuse carrier and a fuselink carr;ed thereby.
According to the inventlon there is provided a fuse carrier for a blade-contact cartridge-type fuse-link, comprising an elongate body portion and first and second legs projecting from the body portion on one side thereof, spaced apart from one another and from respective opposite ends of the body portion in the lengthwise direction of the body portion and each extending, generally parallel with one another, across the body portion transversely thereof, the first leg being pierced in the lengthwise direction of the body portion by an elongate slot which extends in the direction in which the legs project and the second leg having a lateral recess.
In use of this fuse carrier according to the invention, a first contact blade of a suitable fuselink is inserted through the slot in the first leg of the carrier and then the other, second, contact blade i5 pushed, transversely of the carrier, 50 that it is received in the recess of the second leg while the aartridge section of the fuselink is accommodated between the two legs with. the cartridge at least approximately aligned with the lengthwise direction of the carrier and the contact blades projecting, in that direction, beyond the first and second legs respectively.
Thus the invention further provides a fuse carrier as specified in the last but one preceding paragraph and fitted with a blade-contact ~: cartridge-type fuselink, the fuselink having its cartridge section accommodated between the two legs of the carrier and having a first contact blade inserted through the slot in the first leg of the carrier and a second contact blade received in the recess of the second leg, ,,';ll j ', I. 17~7~
with the first and second contact blade~ extending beyond the first and second legs, respect.ively7 of the carrier.
Preferably, the fuse carrier according to the inven.tion is formed with a lug or tongue which hinders, but does not prevent~ transverse movement of a fuselink second contact blade into (and more especially out of) the lateral recess of the second leg of the carrier, and with abutments which engage against respective ends of a fuselink cartridge section accommodated bet~een the fuse carrier legs, so that it is the abutments~
rather than the peripheries of the slot and of the lateral recessj-by which thrust forces are transmitted from the fuse carrier to the fuselink as these are inserted together into a co-operating fuseholder base.
: The invention, in another of its aspects, : provides a fuseholder comprising a fuse carrier as described in any of the four last preceding paragraphs : and a fuseholder ~ase adapted to receive as a legs-first ~ 20 push fit the fuse carrier and a fuselink fitted thereto, :: the fuseholder base being provided with apair of fixed contacts positioned to receive and co-operate with the respective blade contacts of such fuselink as the fuse ; carrier is fit-ted to the fuseholder base.
~he invention in its various aspects will be more fully understood from the following description of preferred embodiments thereof with reference to the accompanying drawings, in which:-~igure 1 is a perspective view of a fuse carrier according to the invention, Figure 2 is a perspective view of the fuse carrier shown in ~igure 1~ fitted with a blade-contact cartridge-type fuselink;
Figure 3 is a longitudinal section of the fuse-carrier~ taken on the plane III - III o~ ~igure 1;
Figure 4 is a transverse sectional view taken on the line IV - IV of ~igure 3;
~2~7 ~ igure 5 is a longitudinal sectional view of the fusecarrier shown in Figures 1 to 4 and of a fuse-holder base in which it is shown inserted;
Fi~ire 6 is a transverse sectional view through the fusecarrier and fuseholder base~ taken on the line VI - VI of Figure 5; and Figure 7 is a perspective view of one of two terminal shrouds of the fuseholder base shown in ~igures 5 and 60 As shown in ~igure 1~ a fuse carrier 11 according to the invention, which may be formed as a one-piece plastics moulding, has an elongate and generally rectangular body portion 12 from one side of which project first and second legs 13 and 14 which are spaced apart from one another in the lengthwise direction of the bod~ portion 12 and which extend, generally parallel with one another~ across the body portion 123 trans-versely thereof.
~he first leg 1~ is pierced, in the lengthwise direction of the body portion 12, by a slot 15 which extends in the direction i~ which the legs project, and the second leg 14 is formed with a lateral recess 16 As shown in Figuxe 2, this enables a suitable blade contact cartridge-type fuselink 17 ko be fitted to the fusecarrier 11 by first inserting a first contact blade 18 of the fuseliDk 17 through the slot 15 and then ~ : pushing the other, second, contact blade 19 of the fuse-: link transversely of the fusecarrier 50 that it is received in the recess 16 while the cartridge section : ~0 20 of the fuselink is accommodated, between the two : legs 1~ and 14~ at least approximately in alignment with ~ the lengthwise direction of the fuse carrier 11 (in : which direction the contact blade~ 18 and 19 project clear of the legs 13 and 14 respectively).
~5 Preferably, aQd as shown, the fusecarrier 11 is provided with a pro~ecting lug or tongue 21 which ~-6--hinders, but does not prevent, transverse movement of the contact blade 19 into and out of the recess 16.
~he tongue 21 may be slightly flexible at i-ts end, and away from its end it may be sti.ffened by integ.ral buttresses 22. Preferably, also~ the fuse carrier is formed with a pair of abutments 23 which, on insertion of the fuse carrier 11 and fuselink 17 together into a fuseholder base (as described below)~ transmit thrust forces from the fuse carrier to end caps 20' of the cartridge section 20 of the fuselink.
~ he contact blades 18 and 19 of the fuse 20 lie in parallel planes spaced equally on opposite sides of a diametral plane of the cartridge section 20 which îs parallel to both~ and correspondingly the slot 15 in the fuse carrier first leg 1~ and the position loosely defined for the contact blade 19 b~ the tongue 21 and the recess 16 i~ the fuse carrier second leg 14 are both offset on opposite sides of a longitudinal median plane of the fuse carrier~
- Some of the details of the fuse carrier 11 are more precisely represented in ~igures 3 and 4g which also show a small part-cylindrical projection or boss 24 not visible in ~igures 1 and 2 ~ut formed on the leg 14 and engaged b~ the blade 19 (shown in broken line in ~; ~ 25 ~igure 4) as the blade is pushed past the tongue 21~
~he combination of the tongue 21~ the boss 24, a slight obliquity of the limiting edge of the recess 16, and a slight looseness of the fit of the fuselink contact : blade 18 in the sIot 15 enable the fuse carrier to accept and retain a variety o~ fuselinks which, though nominally identical, may have small dimen~ional differ-ences because9 for example9 they may be ~he products of : different manufacturers. ~igures 3 and 4 also show the leg 14 providedq optionally~ with a stiffening or strengthening web 14' which is not shown in ~igures 1 and ~
2 ~ ~ 2 ~7--~ igures 5 and 6 show the fuse carrier 11 and fuselink 17 inserted into a nlseholder base 25 which has the general form of an open box with a base portion 26, end walls 27 and side walls 28. ~he body portion 12 of the fuse carrier 11 serves as a closure for the box-form base 25, and has a rectangular skirt 29 which enters as a close clearance fit between the base walls 27 and 28O The skirt 29 is formed with two proj ecting ribs 30 (See ~igures 1 and 2) which frictionally engage the opposed side walls 2~ of the base to retain the fusecarrier in its inserted position even if it has ; no fuselink 17 fitted.
~ he base 25 is fitted with a pair of fixed contacts constituted by first and second terminal 15 blocks 31 and 32 each secured, together with a respec- -tive springy contact stirrup 33 (see ~igure ~), to the base 25 by means of a respective securing screw 34 whose head is shrouded b~ a subsequently fitted insulating ; disc 35O ~he base end walls 27 have apertures 36 each : 20 aligned with a bore 37 in the respective contact block 31 or ~2 for insertion of a respective electrical con-ductor (not shown) whose end is then clamped by a res-:pective clamping screw (not shown) screwed into a ~-threaded bore 38 of the contact block 31 or 32. Each ~::
contact block 31 or 32 and its associated stirrup 33 : : :is positioned to receive, as shown in Figure 6, a contact blade 18 or 19 respectively of a ~uselink 17 when the fusecarrier 11, with the fuselink 17 fitted as shown in Figure 2, is inserted into the fuseholder :30 base 25.
:~he fuseholder base, which is formed with a ;central boss 39 and fixing hole ~0 by means of which it can be mounted for use, is fitted with a pair of ~:insulating shrouds 41 ~of which one is shown in per-spective in ~igure 7) which shroud the contact blocks 31 ~:
.
~, . 17~672 and 32 and their stirrups 33 against accidental contact while the fusecarr;er 11 is removed~ Each end wall 27 of the fuseholder base has a bore 42 to receive a spigot 43 of a respective one of the shrouds 41 as the shroud is pushed into place as shown in Figures 5 and 6. Preferably, the shroud is of somewhat resilient material and its spigot and the bore 42 are profiled so that the spigot enters the bore as a snap fit; and preferably9 then, each shroud is formed with a small recess 44, adjacent its spigot, into which the end of a screw-driver can be inserted and then turned (to bear against the adjacent wall 27 of the fuseholder base) to withdraw the spigot from its bore 42 when it is required to remove the shroud, for example to gain access to the clamping screw in the bore 38 of the shroud ed contact block. ~he need to use a tool when removing the shrouds, even thou~h they can be fitted manually into the fuseholder base, is a use~ul safety feature which assists in discouraging casual or thoughtless tampering.
~ ach shroud 41 has a slot 45 to accept the passage of the fuselink blade contact 18 or 19 as it is inserted towards and between the respective contact block 31 or 32 and its stirrup 33, and is recessed at i~ ~J
46 to give clearance for the end of the tongue 21 of : the ~usecarrier. ~ach shroud 41 is also formed with a projecting parti46 which co-operates with a corresponding-ly recessed zone 47 or 48 of the fuse carrier legs 13 : and 14 respectively and helps to guide and position the ~0 fusecarrier correctly as it is inserted into the fuse-holder base~
: It will be understood that many of the details described above may be altered within the scope of the ~n~e~tion~ but that any embodiment of the in~ention ~5 provides ~ very convenient one-part contactless fuse 2~2 _9 ; c~rrier for a blade-contact cartridge type fuse and an : improved fuseholder comprising ir. combi~ation such a fuse carrier and a suitable fuseholder base~
.
Claims (27)
PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A fuse carrier for a blade-contact cartridge-type fuselink, comprising an elongate body portion and first and second legs projecting from the body portion on one side thereof, spaced apart from one another and from respective opposite ends of the body portion in the lengthwise direction of the body portion and each extending, generally parallel with one another, across the body portion transversely thereof, the first leg being pierced in the lengthwise direction of the body portion by an elongate slot which extends in the direction in which the legs project and the second leg having a lateral recess.
2. A fuse carrier as claimed in Claim 1 and fitted with a blade-contact cartridge-type fuselink, the fuselink having its cartridge section accommo-dated between the two legs of the carrier and having a first contact blade inserted through the slot in the first leg of the carrier and a second contact blade received in the recess of the second leg, with the first and second contact blades extending beyond the first and second legs, respectively, of the carrier.
3. A fuse carrier as claimed in Claim 2, and provided with a lug or tongue which hinders, but does not prevent, transverse movement of a fuselink second contact blade into and out of the lateral recess of the second leg of the carrier while the first contact blade of the fuselink is engaged in the slot of the first leg of the carrier.
4. A fuse carrier as claimed in Claim 1 or Claim 2 or Claim 3 and provided with abutments positioned for engagement against respective ends of of a fuselink cartridge section, accommodated between the fuse carrier legs, for transmission of thrust there-to in the direction in which the legs project.
5. A fuseholder for a blade-contact cartridge-type fuselink, comprising a fuse carrier as claimed in Claim 1 and a fuseholder base adapted to receive as a legs-first push fit the fuse carrier and a fuse-link fitted thereto, the fuseholder base being provided with a pair of fixed contacts positioned to receive and co-operate with the respective blade contacts of such fuselink as the fuse carrier is fitted to the fuseholder base.
6. A fuseholder as claimed in Claim 5, wherein the fuseholder base is generally in the form of an open box and the body portion of the fuse carrier serves, on insertion of the legs thereof into the fuseholder base, as a closure therefor.
7. A fuseholder as claimed in Claim 6, wherein the body portion of the fuse carrier has a skirt pro-jecting therefrom in the same direction as the legs thereof and the skirt enters as a close clearance fit between walls of the fuseholder base.
8. A fuseholder as claimed in Claim 7, wherein the skirt of the fuse carrier is provided with pro-jecting ribs which, on insertion of the fuse carrier into the fuseholder base, frictionally engage opposed walls thereof to retain the fuse carrier in the inserted position.
9. A fuseholder as claimed in Claim 8 and fitted with insulating shrouds for the fixed contacts, each shroud being slotted to allow passage of a respective fuselink contact blade.
10. A fuseholder as claimed in Claim 5 and fitted with insulating shrouds for the fixed contacts, each shroud being slotted to allow passage of a respective fuselink contact blade.
11. A fuse carrier as claimed in Claim 1, and provided with a lug or tongue which hinders, but does not prevent, transverse movement of a fuselink second contact blade into and out of the lateral recess of the second leg of the carrier while the first contact blade of the fuselink is engaged in the slot of the first leg of the carrier.
12. A fuseholder for a blade-contact cartridge-type fuselink, comprising a fuse carrier as claimed in Claim 11 and a fuseholder base adapted to receive as a legs-first push fit the fuse carrier and a fuse-link fitted thereto, the fuseholder base being provided with a pair of fixed contacts positioned to receive and co-operate with the respective blade contacts of such fuselink as the fuse carrier is fitted to the fuseholder base.
13. A fuseholder as claimed in Claim 12, wherein the ruseholder base is generally in the form of an open box and the body portion of the fuse carrier serves, on insertion of the legs thereof into the fuseholder base, as a closure therefor.
14. A fuseholder as claimed in Claim 13, wherein the body portion of the fuse carrier has a skirt pro-jecting therefrom in the same direction as the legs thereof and the skirt enters as a close clearance fit between walls of the fuseholder base.
15. A fuseholder as claimed in Claim 14, wherein the skirt of the fuse carrier is provided with pro-jecting ribs which, of insertion of the fuse carrier into the fuseholder base, frictionally engage opposed walls thereof to retain the fuse carrier in the inserted position.
16. A fuseholder as claimed in Claim 15 and fitted with insulating shrouds for the fixed contacts, each shroud being slotted to allow passage of a respective fuselink contact blade.
17. A fuseholder as claimed in Claim 11 or Claim 12 or Claim 13, wherein the fuse carrier is provided with abutments positioned for engagement against respective ends of a fuselink cartridge section, accommodated between the fuse carrier legs, for transmission of thrust thereto in the direction in which the legs project.
18. h fuseholder as claimed in Claim 14 or Claim 15 or Claim 16, wherein the fuse carrier is provided with abutments positioned for engage-ment against respective ends of a fuselink cartridge section, accommodated between the fuse carrier legs, for transmission of thrust thereto in the direction in which the legs project.
19. A fuseholder for a blade-contact cartridge type fuselink, comprising a fuse carrier as claimed in Claim 2 and a fuseholder base adapted to receive as a legs-first push fit the fuse carrier and a fuselink fitted thereto, the fuseholder base being provided with a pair of fixed contacts positioned to receive and co-operate with the respective blade contacts of such fuselink as the fuse carrier is fitted to the fuseholder base.
20. A fuseholder as claimed in Claim 19, wherein the fuseholder base is generally in the form of an open box and the body portion of the fuse carrier serves, on insertion of the legs thereof into the fuseholder base, as a closure therefor.
21. A fuseholder as claimed in Claim 20, wherein the body portion of the fuse carrier has a skirt pro-jecting therefrom in the same direction as the legs thereof and the skirt enters as a close clearance fit between walls of the fuseholder base.
22. A fuseholder as claimed in Claim 21, wherein the skirt of the fuse carrier is provided with pro-jecting ribs which, on insertion of the fuse carrier into the fuseholder base, frictionally engage opposed walls thereof to retain the fuse carrier in the inserted position.
23. A fuseholder as claimed in Claim 22 and fitted with insulating shrouds for the fixed contacts 3 each shroud being slotted to allow passage of a respective fuselink contact blade.
24. A fuseholder as claimed in Claim 23, wherein each shroud is provided with one element, and the fuse-holder base with a respective complementary element, of a snap-fit assembly of the shroud to the base and with respective surfaces which, in the assembled position of the shroud are opposed to and slightly spaced from ore another for insertion of a tool therebetween to facilitate removal of the shroud.
25. A fuseholder as claimed in Claim 19 or Claim 20 or Claim 21, wherein the fuse carrier is provided with a lug or tongue which hinders, but does not prevent, transverse movement of a fuselink second contact blade into and out of the lateral recess of the second leg of the carrier while the first contact blade of the fuselink is engaged in the slot of the first leg of the carrier.
26. A fuseholder as claimed in Claim 22 or Claim 23, or Claim 249 wherein the fuse carrier is provided with a lug or tongue which hinders, but does not prevent, transverse movement of a fuselink second contact blade into and out of the lateral recess of the second leg of the carrier while the first contact blade of the fuselink is engaged in the slot of the first leg of the carrier.
27. A fuseholder as claimed in Claim 9 or Claim 10 or Claim 16, wherein each shroud is provided with one element, and the fuseholder base with a respective complimentary element, of a snap-fit assembly of the shroud to the base and with respective surfaces which, in the assembled position of the shroud are opposed to and slightly spaced from one another for insertion of a tool therebetween to facilitate removal of the shroud.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8126887 | 1981-09-04 | ||
| GB8126887 | 1981-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1172672A true CA1172672A (en) | 1984-08-14 |
Family
ID=10524330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000409560A Expired CA1172672A (en) | 1981-09-04 | 1982-08-17 | Fuseholders |
Country Status (7)
| Country | Link |
|---|---|
| AU (1) | AU551599B2 (en) |
| CA (1) | CA1172672A (en) |
| HK (1) | HK98085A (en) |
| IN (1) | IN158139B (en) |
| MY (1) | MY8600265A (en) |
| NZ (1) | NZ201615A (en) |
| ZA (1) | ZA826139B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8323821D0 (en) * | 1983-09-06 | 1983-10-05 | Midland Electric Mfg Co Ltd | Fuse-link carrier |
-
1982
- 1982-08-16 IN IN623/DEL/82A patent/IN158139B/en unknown
- 1982-08-17 NZ NZ20161582A patent/NZ201615A/en unknown
- 1982-08-17 CA CA000409560A patent/CA1172672A/en not_active Expired
- 1982-08-23 AU AU87503/82A patent/AU551599B2/en not_active Ceased
- 1982-08-24 ZA ZA826139A patent/ZA826139B/en unknown
-
1985
- 1985-12-05 HK HK98085A patent/HK98085A/en unknown
-
1986
- 1986-12-30 MY MY8600265A patent/MY8600265A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NZ201615A (en) | 1985-03-20 |
| AU8750382A (en) | 1983-03-10 |
| IN158139B (en) | 1986-09-13 |
| MY8600265A (en) | 1986-12-31 |
| HK98085A (en) | 1985-12-13 |
| AU551599B2 (en) | 1986-05-08 |
| ZA826139B (en) | 1983-07-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEC | Expiry (correction) | ||
| MKEX | Expiry |