CA2396701A1 - Transformer stud mounting block and multi-conductor connector assemblies - Google Patents
Transformer stud mounting block and multi-conductor connector assemblies Download PDFInfo
- Publication number
- CA2396701A1 CA2396701A1 CA 2396701 CA2396701A CA2396701A1 CA 2396701 A1 CA2396701 A1 CA 2396701A1 CA 2396701 CA2396701 CA 2396701 CA 2396701 A CA2396701 A CA 2396701A CA 2396701 A1 CA2396701 A1 CA 2396701A1
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- Canada
- Prior art keywords
- mounting block
- stud
- hole
- connector
- conductor
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- 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.)
- Abandoned
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/04—Leading of conductors or axles through casings, e.g. for tap-changing arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/22—Bases, e.g. strip, block, panel
- H01R9/24—Terminal blocks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/02—Intermediate parts for distributing energy to two or more circuits in parallel, e.g. splitter
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/36—Conductive members located under tip of screw
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
Abstract
A mounting block assembly for interconnecting a conductor connector with a transformer stud is disclosed. This assembly comprises a mounting block made of electrically conductive material, a deformable stud-receiving hole in the mounting block, a first connector-and-block interconnecting fastener dedicated, when tightened, to connect the conductor connector to the mounting block, and a second fastener having both a connector-and-block interconnecting portion and a hole-deforming portion. This second fastener, when tightened, simultaneously connects the conductor connector to the mounting block and deforms the stud-receiving hole such that its inner surface grips the transformer stud. This provides a conductive path between the conductor connector and the transformer stud. Also disclosed is a connector assembly for attaching at least one conductor to a transformer stud, which comprises the conductor connector, the mounting block, and the first and second fasteners.
Description
TITLE OF THE INVENTION
TRANSFORMER STUD MOUNTING BLOCK AND MULTI-CONDUCTOR
CONNECTOR ASSEMBLIES
FIELD OF THE INVENTION
The present invention relates to a transformer stud mounting block assembly. The present invention also relates to a connector assembly comprising a mounting block to connect a conductor connector to a transformer stud.
BACKGROUND OF THE INVENTION
Electrical connections to the primary and secondary windings of a power transformer are generally provided by means of a number of cylindrical, splined or threaded, and electrically conductive studs protruding from the housing of the transformer. Typically, conductors are connected to a given stud through an adapter made of an electrically conductive and readily machined material such as brass or aluminium. The adapter is fixedly mounted to the stud and includes a series of conductor-receiving assemblies into which one or more individual conductors may be introduced and secured.
A variety of adapters for connecting electrical conductors to a transformer stud have been developed. These adapters are typically fabricated from a single piece of conductive metal which is appropriately machined to accept both the transformer stud and at least one electrical conductor. These known adapters use either:
TRANSFORMER STUD MOUNTING BLOCK AND MULTI-CONDUCTOR
CONNECTOR ASSEMBLIES
FIELD OF THE INVENTION
The present invention relates to a transformer stud mounting block assembly. The present invention also relates to a connector assembly comprising a mounting block to connect a conductor connector to a transformer stud.
BACKGROUND OF THE INVENTION
Electrical connections to the primary and secondary windings of a power transformer are generally provided by means of a number of cylindrical, splined or threaded, and electrically conductive studs protruding from the housing of the transformer. Typically, conductors are connected to a given stud through an adapter made of an electrically conductive and readily machined material such as brass or aluminium. The adapter is fixedly mounted to the stud and includes a series of conductor-receiving assemblies into which one or more individual conductors may be introduced and secured.
A variety of adapters for connecting electrical conductors to a transformer stud have been developed. These adapters are typically fabricated from a single piece of conductive metal which is appropriately machined to accept both the transformer stud and at least one electrical conductor. These known adapters use either:
(a) a thread on the transformer stud and a complementary threaded hole in the adapter to screw the adapter onto the transformer stud; or (b) a hole in the adapter, which is oversized with respect to the transformer stud to slip-fit the adapter on the stud of the transformer.
Adapters of type (a) suffer from the drawback that they have to be screwed onto the transformer stud which may be quite long. Additionally, the region of electrical contact between the threaded outer surface of the transformer stud and the threaded inner surface of the hole in the adapter is subject to oxidisation since adequate spacing between these two surfaces is required to allow the adapter to be screwed onto the stud. This may lead to poor electrical conductivity between the stud and the adapter.
Also, removal (by unscrewing) of the adapter from the transformer stud requires disconnection of every conductor.
Adapters of type (b) suffer from the drawback that the stud of the transformer is typically secured in the hole of the adapter by means of one or more retaining screws which intersect with the hole and, once tightened, force the stud into contact with the inner surface of the hole. As the stud is forced against one side of the inner surface of the hole, an air gap is formed between the stud and the hole surface on the side of the stud opposite to the region of contact, leading to reduced conductivity and increasing the potential for oxidisation.
Also known are adapters comprised of a conductor connecting pad and a mounting block wherein the connector connecting pad is removably secured to the mounting block through a suitable fastener arrangement, typically, as discussed above, a screw-on or slip-on fastener arrangement.
However, these adapters require another separate arrangement to secure the mounting block to the transformer stud, thereby increasing the complexity of the machining of the adapter and the number of components necessary to assemble that adapter.
SUMMARY OF THE INVENTION
The present invention overcomes the above and other drawbacks by providing a mounting block assembly for interconnecting a conductor connector with a transformer stud comprising:
- a mounting block made of electrically conductive material;
- a deformable stud-receiving hole in the mounting block, the stud-receiving hole having an inner surface and dimensions suitable to receive the transformer stud;
a first connector-and-block interconnecting fastener dedicated, when tightened, to connect the conductor connector to the mounting block;
and - a second fastener having both a connector-and-block interconnecting portion and a hole-deforming portion, said second fastener, when tightened, simultaneously connecting the conductor connector to the mounting block and deforming the stud-receiving hole such that its inner surface grips the transformer stud.
The present invention also relates to a connector assembly for attaching at least one conductor to a transformer stud, comprising:
- an electrically conductive conductor connector comprising at least one conductor attachment point for said at least one conductor;
- a mounting block made of electrically conductive material;
- a deformable stud-receiving hole in the mounting block, this stud-receiving hole having an inner surface and dimensions suitable to receive the transformer stud;
Adapters of type (a) suffer from the drawback that they have to be screwed onto the transformer stud which may be quite long. Additionally, the region of electrical contact between the threaded outer surface of the transformer stud and the threaded inner surface of the hole in the adapter is subject to oxidisation since adequate spacing between these two surfaces is required to allow the adapter to be screwed onto the stud. This may lead to poor electrical conductivity between the stud and the adapter.
Also, removal (by unscrewing) of the adapter from the transformer stud requires disconnection of every conductor.
Adapters of type (b) suffer from the drawback that the stud of the transformer is typically secured in the hole of the adapter by means of one or more retaining screws which intersect with the hole and, once tightened, force the stud into contact with the inner surface of the hole. As the stud is forced against one side of the inner surface of the hole, an air gap is formed between the stud and the hole surface on the side of the stud opposite to the region of contact, leading to reduced conductivity and increasing the potential for oxidisation.
Also known are adapters comprised of a conductor connecting pad and a mounting block wherein the connector connecting pad is removably secured to the mounting block through a suitable fastener arrangement, typically, as discussed above, a screw-on or slip-on fastener arrangement.
However, these adapters require another separate arrangement to secure the mounting block to the transformer stud, thereby increasing the complexity of the machining of the adapter and the number of components necessary to assemble that adapter.
SUMMARY OF THE INVENTION
The present invention overcomes the above and other drawbacks by providing a mounting block assembly for interconnecting a conductor connector with a transformer stud comprising:
- a mounting block made of electrically conductive material;
- a deformable stud-receiving hole in the mounting block, the stud-receiving hole having an inner surface and dimensions suitable to receive the transformer stud;
a first connector-and-block interconnecting fastener dedicated, when tightened, to connect the conductor connector to the mounting block;
and - a second fastener having both a connector-and-block interconnecting portion and a hole-deforming portion, said second fastener, when tightened, simultaneously connecting the conductor connector to the mounting block and deforming the stud-receiving hole such that its inner surface grips the transformer stud.
The present invention also relates to a connector assembly for attaching at least one conductor to a transformer stud, comprising:
- an electrically conductive conductor connector comprising at least one conductor attachment point for said at least one conductor;
- a mounting block made of electrically conductive material;
- a deformable stud-receiving hole in the mounting block, this stud-receiving hole having an inner surface and dimensions suitable to receive the transformer stud;
- a first connector-and-block interconnecting fastener dedicated, when tightened, to connect the conductor connector to the mounting block;
and - a second fastener having both a connector-and-block interconnecting portion and a hole-deforming portion, said second fastener, when tightened, simultaneously connecting the conductor connector to the mounting block and deforming the stud-receiving hole such that its inner surface grips the transformer stud.
The foregoing and other objects, advantages and features of the present invention will become more apparent upon reading of the following non restrictive description of illustrative embodiments thereof, given by way of example only with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the appended drawings:
Figure 1 is a perspective view of a first illustrative embodiment of the transformer stud mounting block according to the invention, disposed on a transformer stud;
Figure 2 is a front, elevational and cross sectional view of the transformer stud mounting block of Figure 1;
Figure 3 is a perspective view of an illustrative embodiment of an assembly according to the present invention for attaching electrical conductors to a transformer stud;
Figure 4 is a bottom view of the assembly of Figure 3; and Figure 5 is a perspective view of a second illustrative embodiment of the transformer stud mounting block in accordance with the present invention.
and - a second fastener having both a connector-and-block interconnecting portion and a hole-deforming portion, said second fastener, when tightened, simultaneously connecting the conductor connector to the mounting block and deforming the stud-receiving hole such that its inner surface grips the transformer stud.
The foregoing and other objects, advantages and features of the present invention will become more apparent upon reading of the following non restrictive description of illustrative embodiments thereof, given by way of example only with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
In the appended drawings:
Figure 1 is a perspective view of a first illustrative embodiment of the transformer stud mounting block according to the invention, disposed on a transformer stud;
Figure 2 is a front, elevational and cross sectional view of the transformer stud mounting block of Figure 1;
Figure 3 is a perspective view of an illustrative embodiment of an assembly according to the present invention for attaching electrical conductors to a transformer stud;
Figure 4 is a bottom view of the assembly of Figure 3; and Figure 5 is a perspective view of a second illustrative embodiment of the transformer stud mounting block in accordance with the present invention.
Illustrative embodiments of the transformer stud mounting block will now be described.
Referring to Figure 1, a transformer stud mounting block 2 is illustrated. The mounting block 2 is fabricated from an electrically conductive material which lends itself well to casting and/or machining, such as aluminium, brass or copper. To provide enhanced resistance to corrosion and oxidisation while maintaining conductive properties following machining, the outer surface of the mounting block 2 can be plated with a conductive protective coating 4. For example, the protective coating 4 can be deposited on the outer surface of the mounting block 2 by means of well known techniques such as anodising or electroplating techniques.
A transverse cylindrical stud-receiving hole 6 is machined through the mounting block 2 from the front face 8 to the rear face 10 thereof. The stud-receiving hole 6 has a diameter so adjusted that a stud 12 of a transformer can be freely inserted into the hole 6, fitting snugly against the inner surface 14 of the hole 6.
The transformer stud 12 is generally cylindrical and made of a conductive material such as aluminium. Stud 12 is typically embedded in the transformer housing 16, and protrudes therefrom. The outer surface 18 of a transformer stud 12 is often machined with a thread (not shown), or with a series of longitudinal, parallel and equally spaced apart grooves 20 arranged around the circumference of the transformer stud 12. The grooves 20 improve the grip exerted by the inner surface 14 of the stud-receiving hole 6 on the transformer stud 12. In an alternative embodiment, the inner surface 14 of the stud-receiving hole 6 may also be machined with a similar complementary grooved pattern.
Referring to Figure 2 in addition to Figure 1, in order to securely fasten the mounting block 2 onto the transformer stud 12, a crimping slot 22 is machined in the mounting block 2 from the side face 24 to the stud-receiving hole 6 in such a manner that the median plane of the slot 22 intersects with the axis of the hole 6. A first cylindrical bolt-receiving hole 26 extends through the mounting block 2 from the lower face 28 to the upper face 30. Hole 26 is perpendicular to both the hole 6 and the crimping slot 22. The inner surface 32 of the upper section of hole 26 located above the crimping slot 22 is threaded. The surtace 34 of the lower section of hole 26 located below the crimping slot 22 is smooth and presents a diameter slightly larger than the threaded inner surface 32. A first bolt 36 having a head 38 and a threaded shank 40 is freely inserted through the lower section of hole 26 and is screwed into the threaded inner surtace 32 of the upper section of hole 26.
Tightening the first bolt 36 with the head 38 applied to the lower face 28 of the mounting block 2 causes the upper and lower inner faces 52, 54 of the crimping slot 22 to be deflected towards one another, thereby reducing the diameter of the stud-receiving hole 6. By placing the mounting block 2 on a transformer stud 12 and tightening the first bolt 36, the transformer stud 12 can be gripped by the inner surface 14 of the stud-receiving hole 6. A curved middle portion of the upper face 30 of block 2 is coaxial with the stud-receiving hole 6, and allows deformation of the inner surface 14 of the stud-receiving hole 6 caused by tightening of the first bolt 36 to remain uniform over a larger portion of the circumference of the inner surface 14. By distributing the deformation over a larger region, as opposed to concentrating it in one localised zone (which is typically the effect of using retaining screws as disclosed in the prior art), the pressure exerted by the inner surface 14 on the outer surface 18 of the transformer stud 12 remains even over a larger region, thereby improving contact between the two surfaces. This additionally decreases the possibility of oxidisation build-up between the two surfaces thereby improving electrically conductive performance.
A second cylindrical bolt-receiving hole 42 has an inner threaded surface 44 to receive a second bolt 46. Hole 42 is generally parallel to hole 26 and extends from lower face 28 to upper face 30. This second bolt 46 is also provided with a head 48 and a threaded shank 50 which can be screwed into threaded hole 42.
Referring now to Figures 3 and 4, the second bolt 46 is dedicated to secure the electrical pad-mount connector 56 to the mounting block 2. The first bolt 36 also contributes to secure this electrical pad-mount connector 56 to the mounting block 2. As shown in Figure 3, the pad-mount connector 56 presents the general configuration of a parallelepiped and is fabricated from a piece of electrically conductive material which lends itself well to casting and machining, such as aluminium, brass or copper. To provide enhanced resistance to corrosion and oxidisation following machining while rnaintaining the required electrically conductive properties, the outer surface of the pad-mount connector 56 can be plated with a conductive protective coating 58, the protective coating 58 being deposited on the outer surface by well known techniques such as, for example, anodising and electroplating techniques.
Two parallel series of conductor attachment points 60 are machined in the pad-mount connector 56. Each conductor attachment point 60 comprises a conductor-receiving hole 61 extending from the upper face 62 of the pad-mount connector 56 to the lower face 64 thereof. Additionally, each conductor attachment point 60 comprises a threaded screw-receiving hole 66 extending through the pad-mount connector 56 from a side face 68 (or 70) thereof to the corresponding hole 61. The axes of the corresponding holes 61 and 66 are perpendicular and intersect with each other. A set screw such as 72 is engaged with the thread of each hole 66. The diameters of the conductor-receiving holes 61 and screw-receiving holes 66 are approximately the same, although the inner surfaces of the screw-receiving holes 66 are formed with a thread for accepting the set screws 72. In the illustrative embodiment of Figure 3, the set screws 72 are headless Allan-type machine screws.
As illustrated in Figure 4, a conductor such as 74 is connected both mechanically and electrically to the pad-mount connector 56 by first stripping the dielectric covering 76 from the conductor 74 thereby exposing a short end section of wire 78. The short end section of wire 78 is inserted into one of the conductor-receiving hole 61 and the set screw 72 tightened.
The set screw 72 has a raised nipple 80 on the end thereof which comes into contact with the short end wire section. As the set screw 72 is tightened the section of wire 78 is pressed between the raised nipple 80 and the inner surface 82 of the conductor-receiving hole 61. The short end section of wire 78 is then deformed, thereby increasing the surface and quality of the contact with the inner surface 82. Through further tightening of the set screw 72 the short section of wire 78 is held firmly within the conductor-receiving hole 61 of the conductor attachment point 60. In an illustrative embodiment the conductor 74 is stranded to facilitate deformation, thereby improving the quality of contact.
Additionally, further conductor attachment points such as 84 for smaller gauge wires are included to increase the versatility of the assembly.
Referring to Figure 1, a transformer stud mounting block 2 is illustrated. The mounting block 2 is fabricated from an electrically conductive material which lends itself well to casting and/or machining, such as aluminium, brass or copper. To provide enhanced resistance to corrosion and oxidisation while maintaining conductive properties following machining, the outer surface of the mounting block 2 can be plated with a conductive protective coating 4. For example, the protective coating 4 can be deposited on the outer surface of the mounting block 2 by means of well known techniques such as anodising or electroplating techniques.
A transverse cylindrical stud-receiving hole 6 is machined through the mounting block 2 from the front face 8 to the rear face 10 thereof. The stud-receiving hole 6 has a diameter so adjusted that a stud 12 of a transformer can be freely inserted into the hole 6, fitting snugly against the inner surface 14 of the hole 6.
The transformer stud 12 is generally cylindrical and made of a conductive material such as aluminium. Stud 12 is typically embedded in the transformer housing 16, and protrudes therefrom. The outer surface 18 of a transformer stud 12 is often machined with a thread (not shown), or with a series of longitudinal, parallel and equally spaced apart grooves 20 arranged around the circumference of the transformer stud 12. The grooves 20 improve the grip exerted by the inner surface 14 of the stud-receiving hole 6 on the transformer stud 12. In an alternative embodiment, the inner surface 14 of the stud-receiving hole 6 may also be machined with a similar complementary grooved pattern.
Referring to Figure 2 in addition to Figure 1, in order to securely fasten the mounting block 2 onto the transformer stud 12, a crimping slot 22 is machined in the mounting block 2 from the side face 24 to the stud-receiving hole 6 in such a manner that the median plane of the slot 22 intersects with the axis of the hole 6. A first cylindrical bolt-receiving hole 26 extends through the mounting block 2 from the lower face 28 to the upper face 30. Hole 26 is perpendicular to both the hole 6 and the crimping slot 22. The inner surface 32 of the upper section of hole 26 located above the crimping slot 22 is threaded. The surtace 34 of the lower section of hole 26 located below the crimping slot 22 is smooth and presents a diameter slightly larger than the threaded inner surface 32. A first bolt 36 having a head 38 and a threaded shank 40 is freely inserted through the lower section of hole 26 and is screwed into the threaded inner surtace 32 of the upper section of hole 26.
Tightening the first bolt 36 with the head 38 applied to the lower face 28 of the mounting block 2 causes the upper and lower inner faces 52, 54 of the crimping slot 22 to be deflected towards one another, thereby reducing the diameter of the stud-receiving hole 6. By placing the mounting block 2 on a transformer stud 12 and tightening the first bolt 36, the transformer stud 12 can be gripped by the inner surface 14 of the stud-receiving hole 6. A curved middle portion of the upper face 30 of block 2 is coaxial with the stud-receiving hole 6, and allows deformation of the inner surface 14 of the stud-receiving hole 6 caused by tightening of the first bolt 36 to remain uniform over a larger portion of the circumference of the inner surface 14. By distributing the deformation over a larger region, as opposed to concentrating it in one localised zone (which is typically the effect of using retaining screws as disclosed in the prior art), the pressure exerted by the inner surface 14 on the outer surface 18 of the transformer stud 12 remains even over a larger region, thereby improving contact between the two surfaces. This additionally decreases the possibility of oxidisation build-up between the two surfaces thereby improving electrically conductive performance.
A second cylindrical bolt-receiving hole 42 has an inner threaded surface 44 to receive a second bolt 46. Hole 42 is generally parallel to hole 26 and extends from lower face 28 to upper face 30. This second bolt 46 is also provided with a head 48 and a threaded shank 50 which can be screwed into threaded hole 42.
Referring now to Figures 3 and 4, the second bolt 46 is dedicated to secure the electrical pad-mount connector 56 to the mounting block 2. The first bolt 36 also contributes to secure this electrical pad-mount connector 56 to the mounting block 2. As shown in Figure 3, the pad-mount connector 56 presents the general configuration of a parallelepiped and is fabricated from a piece of electrically conductive material which lends itself well to casting and machining, such as aluminium, brass or copper. To provide enhanced resistance to corrosion and oxidisation following machining while rnaintaining the required electrically conductive properties, the outer surface of the pad-mount connector 56 can be plated with a conductive protective coating 58, the protective coating 58 being deposited on the outer surface by well known techniques such as, for example, anodising and electroplating techniques.
Two parallel series of conductor attachment points 60 are machined in the pad-mount connector 56. Each conductor attachment point 60 comprises a conductor-receiving hole 61 extending from the upper face 62 of the pad-mount connector 56 to the lower face 64 thereof. Additionally, each conductor attachment point 60 comprises a threaded screw-receiving hole 66 extending through the pad-mount connector 56 from a side face 68 (or 70) thereof to the corresponding hole 61. The axes of the corresponding holes 61 and 66 are perpendicular and intersect with each other. A set screw such as 72 is engaged with the thread of each hole 66. The diameters of the conductor-receiving holes 61 and screw-receiving holes 66 are approximately the same, although the inner surfaces of the screw-receiving holes 66 are formed with a thread for accepting the set screws 72. In the illustrative embodiment of Figure 3, the set screws 72 are headless Allan-type machine screws.
As illustrated in Figure 4, a conductor such as 74 is connected both mechanically and electrically to the pad-mount connector 56 by first stripping the dielectric covering 76 from the conductor 74 thereby exposing a short end section of wire 78. The short end section of wire 78 is inserted into one of the conductor-receiving hole 61 and the set screw 72 tightened.
The set screw 72 has a raised nipple 80 on the end thereof which comes into contact with the short end wire section. As the set screw 72 is tightened the section of wire 78 is pressed between the raised nipple 80 and the inner surface 82 of the conductor-receiving hole 61. The short end section of wire 78 is then deformed, thereby increasing the surface and quality of the contact with the inner surface 82. Through further tightening of the set screw 72 the short section of wire 78 is held firmly within the conductor-receiving hole 61 of the conductor attachment point 60. In an illustrative embodiment the conductor 74 is stranded to facilitate deformation, thereby improving the quality of contact.
Additionally, further conductor attachment points such as 84 for smaller gauge wires are included to increase the versatility of the assembly.
Referring to both Figures 3 and 4, the pad-mount connector 56 includes a proximal, integral connection tongue 86 through which the pad-mount connector 56 is secured to the mounting block 2. To this end, tongue 86 is formed with a pair of holes extending perpendicular to this tongue 86 from the top face 92 to the bottom face 88 thereof. The bolts 36 and 46 are inserted in these holes and screwed into the threaded bolt-receiving holes 26 and 42, respectively. Washers such as 90 are interposed between the bolt heads 38 and 48 and bottom face 88 of the tongue 86. As the bolts 36 and 46 are tightened, the heads 38 and 48 exert pressure on the washers 90 which in turn brings the top face 92 of the connecting tongue 86 into contact with the lower face 28 of the mounting block 2, thereby establishing a conductive path across the interface between faces 28 and 92 (connector-and-block interconnecting portion of the fastener including the bolt 36 and the threaded bolt-receiving hole 26 (threaded inner surface 32)). Tightening of the bolt 36 further causes the upper and lower inner faces 52, 54 of the crimping slot 22 to be deflected towards one another, thereby reducing the diameter of the stud hole 6 and gripping the transformer stud 12 (hole-deforming portion of the fastener including the bolt 36 and the threaded bolt-receiving hole 26 (threaded inner surface 32)).
To subsequently remove the mounting block 2 from the transformer stud 12, one has only to loosen bolt 36 and thereby free stud 12 from hole 6. Then:
- dedicated bolt 46 still secures the pad-mount connector 56 firmly to the mounting block 2; and - loosened bolt 36 still contributes to fasten the pad-mount connector 56 to the mounting block 2, as least to prevent the pad-mount connector 56 to rotate about bolt 46.
Figure 5 illustrates an alternative, illustrative embodiment of a mounting block 100 in accordance with the present invention. The mounting block 100 retains the essential characteristics of the mounting block 2 as described hereinabove with reference to Figures 1-4. However, 5 in addition to first 102 and second 104 bolt-receiving holes, a third bolt-receiving hole 106 is bored through the mounting block 100. Hole 106 is parallel to holes 102 and 104 but is perpendicular to the stud-receiving hole 108. Also, hole 106 extends through the mounting block 100 from the lower face 110 of the mounting block 100 to the upper face 112 thereof. The 10 inner surface 114 of the third bolt-receiving hole 106 located above the crimping slot 116 is threaded while the lower portion (not shown) of the third bolt-receiving hole 106 located below the crimping slot 116 has a smooth surface and a diameter slightly larger than the diameter of the threaded inner surface 114. A third bolt (not shown) having a head and a threaded shank freely slides through the lower section of the third bolt-receiving hole 106 and engages with the threaded inner surface 114 of the third bolt hole 106.
In the same manner, an additional bolt-receiving threaded hole (not shown) similar to bolt-receiving hole 104 could be provided. Such a bolt-receiving hole would be bored through the mounting block 100, parallel to holes 102 and 104 but perpendicular to the stud-receiving hole 108. Also, that hole (not shown) would extend through the mounting block 100 from the lower face 110 of the mounting block 100 to the upper face 112 thereof, but on the side of hole 108 opposite to the crimping slot 116. An additional bolt (not shown) having a head and a threaded shank would extend through an additional hole in the connecting tongue 86 (Figure 3 and 4) and engage the additional threaded hole to better secure this connecting tongue 86 to the mounting block 100.
To subsequently remove the mounting block 2 from the transformer stud 12, one has only to loosen bolt 36 and thereby free stud 12 from hole 6. Then:
- dedicated bolt 46 still secures the pad-mount connector 56 firmly to the mounting block 2; and - loosened bolt 36 still contributes to fasten the pad-mount connector 56 to the mounting block 2, as least to prevent the pad-mount connector 56 to rotate about bolt 46.
Figure 5 illustrates an alternative, illustrative embodiment of a mounting block 100 in accordance with the present invention. The mounting block 100 retains the essential characteristics of the mounting block 2 as described hereinabove with reference to Figures 1-4. However, 5 in addition to first 102 and second 104 bolt-receiving holes, a third bolt-receiving hole 106 is bored through the mounting block 100. Hole 106 is parallel to holes 102 and 104 but is perpendicular to the stud-receiving hole 108. Also, hole 106 extends through the mounting block 100 from the lower face 110 of the mounting block 100 to the upper face 112 thereof. The 10 inner surface 114 of the third bolt-receiving hole 106 located above the crimping slot 116 is threaded while the lower portion (not shown) of the third bolt-receiving hole 106 located below the crimping slot 116 has a smooth surface and a diameter slightly larger than the diameter of the threaded inner surface 114. A third bolt (not shown) having a head and a threaded shank freely slides through the lower section of the third bolt-receiving hole 106 and engages with the threaded inner surface 114 of the third bolt hole 106.
In the same manner, an additional bolt-receiving threaded hole (not shown) similar to bolt-receiving hole 104 could be provided. Such a bolt-receiving hole would be bored through the mounting block 100, parallel to holes 102 and 104 but perpendicular to the stud-receiving hole 108. Also, that hole (not shown) would extend through the mounting block 100 from the lower face 110 of the mounting block 100 to the upper face 112 thereof, but on the side of hole 108 opposite to the crimping slot 116. An additional bolt (not shown) having a head and a threaded shank would extend through an additional hole in the connecting tongue 86 (Figure 3 and 4) and engage the additional threaded hole to better secure this connecting tongue 86 to the mounting block 100.
Tightening the third bolt (not shown) will cause deflection of the upper and lower inner faces 118 and 120 of the crimping slot 116 towards one another, thereby reducing the diameter of the stud hole 108. This effect adds to a similar effect produced by a bolt (not shown) which is inserted in the bolt-receiving hole 102 and tightened. In this manner, the inner surface 122 of the stud-receiving hole 108 exerts a tighter and more reliable grip on the transformer stud 124 previously inserted into the stud-receiving hole 108. Also, this produces a larger surface of contact between the mounting block 100 and the transformer stud 124.
Although the present invention has been described hereinabove by way of illustrative embodiments thereof, these embodiments can be modified at will, within the scope of the appended claims, without departing from the spirit and nature of the subject invention.
Although the present invention has been described hereinabove by way of illustrative embodiments thereof, these embodiments can be modified at will, within the scope of the appended claims, without departing from the spirit and nature of the subject invention.
Claims (12)
1. A mounting block assembly for interconnecting a conductor connector with a transformer stud comprising:
a mounting block made of electrically conductive material;
a deformable stud-receiving hole in the mounting block, said stud-receiving hole having an inner surface and dimensions suitable to receive the transformer stud;
a first connector-and-block interconnecting fastener dedicated, when tightened, to connect the conductor connector to the mounting block; and a second fastener having both a connector-and-block interconnecting portion and a hole-deforming portion, said second fastener, when tightened, simultaneously connecting the conductor connector to the mounting block and deforming the stud-receiving hole such that its inner surface grips the transformer stud.
a mounting block made of electrically conductive material;
a deformable stud-receiving hole in the mounting block, said stud-receiving hole having an inner surface and dimensions suitable to receive the transformer stud;
a first connector-and-block interconnecting fastener dedicated, when tightened, to connect the conductor connector to the mounting block; and a second fastener having both a connector-and-block interconnecting portion and a hole-deforming portion, said second fastener, when tightened, simultaneously connecting the conductor connector to the mounting block and deforming the stud-receiving hole such that its inner surface grips the transformer stud.
2. A mounting block assembly as defined in claim 1, further comprising a third fastener having both a connector-and-block interconnecting portion and a hole-deforming portion whereby said third fastener, when tightened, simultaneously connects the conductor connector to the mounting block and deforms the stud-receiving hole such that said inner surface grips the transformer stud.
3. A mounting block assembly as defined in claim 1, wherein the deformable stud-receiving hole comprises:
a bore through the mounting block; and a crimping slot extending from the bore through the mounting block.
a bore through the mounting block; and a crimping slot extending from the bore through the mounting block.
4. A mounting block assembly as defined in claim 1, wherein said second fastener comprises:
a hole extending through the mounting block, intersecting the crimping slot, and having a threaded portion on one side of the crimping slot; and a bolt having a head and a threaded shank for engaging the threaded portion of the hole.
a hole extending through the mounting block, intersecting the crimping slot, and having a threaded portion on one side of the crimping slot; and a bolt having a head and a threaded shank for engaging the threaded portion of the hole.
5. A mounting block assembly as defined in claim 2, wherein said third fastener comprises:
a hole extending through the mounting block, intersecting the crimping slot, and having a threaded portion on one side of the crimping slot; and a bolt having a head and a threaded shank for engaging the threaded portion of the hole.
a hole extending through the mounting block, intersecting the crimping slot, and having a threaded portion on one side of the crimping slot; and a bolt having a head and a threaded shank for engaging the threaded portion of the hole.
6. A connector assembly for attaching at least one conductor to a transformer stud, comprising:
an electrically conductive conductor connector comprising at least one conductor attachment point for said at least one conductor;
a mounting block made of electrically conductive material;
a deformable stud-receiving hole in the mounting block, said stud-receiving hole having an inner surface and dimensions suitable to receive the transformer stud;
a first connector-and-block interconnecting fastener dedicated, when tightened, to connect the conductor connector to the mounting block; and a second fastener having both a connector-and-block interconnecting portion and a hole-deforming portion, said second fastener, when tightened, simultaneously connecting the conductor connector to the mounting block and deforming the stud-receiving hole such that its inner surface grips the transformer stud.
an electrically conductive conductor connector comprising at least one conductor attachment point for said at least one conductor;
a mounting block made of electrically conductive material;
a deformable stud-receiving hole in the mounting block, said stud-receiving hole having an inner surface and dimensions suitable to receive the transformer stud;
a first connector-and-block interconnecting fastener dedicated, when tightened, to connect the conductor connector to the mounting block; and a second fastener having both a connector-and-block interconnecting portion and a hole-deforming portion, said second fastener, when tightened, simultaneously connecting the conductor connector to the mounting block and deforming the stud-receiving hole such that its inner surface grips the transformer stud.
7. A connector assembly as defined in claim 6, wherein the deformable stud-receiving hole comprises:
a bore through the mounting block; and a crimping slot extending from the bore through the mounting block.
a bore through the mounting block; and a crimping slot extending from the bore through the mounting block.
8. A connector assembly as defined in claim 1, further comprising a third fastener comprising both a connector-and-block interconnecting portion and a hole-deforming portion whereby said third fastener, when tightened, simultaneously connects the conductor connector to the mounting block and deforms the stud-receiving hole such that said inner surface grips the transformer stud.
9. A connector assembly as defined in claim 7, wherein said second fastener comprises:
a hole extending through the mounting block, intersecting the crimping slot, and having a threaded portion on one side of the crimping slot; and a bolt having a head and a threaded shank for engaging the threaded portion of the hole.
a hole extending through the mounting block, intersecting the crimping slot, and having a threaded portion on one side of the crimping slot; and a bolt having a head and a threaded shank for engaging the threaded portion of the hole.
10. A connector assembly as defined in claim 9, wherein the electrically conductive conductor connector comprises a tongue with a hole to receive the bolt with the tongue interposed between the head of the bolt and the mounting block.
11. A connector assembly as defined in claim 10, wherein the tongue comprises a second hole, and said first fastener comprises a second threaded hole in the mounting block and a second bolt, said second bolt having a head and a threaded shank for insertion in the second hole of the tongue and for engaging the second threaded hole of the mounting block with the tongue between the head of the second bolt and the mounting block.
12. A connector assembly as recited in claim 6, wherein said conductor connector is a multi-conductor pad-mount connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2396701 CA2396701A1 (en) | 2002-08-05 | 2002-08-05 | Transformer stud mounting block and multi-conductor connector assemblies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2396701 CA2396701A1 (en) | 2002-08-05 | 2002-08-05 | Transformer stud mounting block and multi-conductor connector assemblies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2396701A1 true CA2396701A1 (en) | 2004-02-05 |
Family
ID=31193619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2396701 Abandoned CA2396701A1 (en) | 2002-08-05 | 2002-08-05 | Transformer stud mounting block and multi-conductor connector assemblies |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2396701A1 (en) |
-
2002
- 2002-08-05 CA CA 2396701 patent/CA2396701A1/en not_active Abandoned
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| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |