Sheave for electrical stringing block
View Patent ↗An electrical stringing block in accordance with some example embodiments includes a sheave formed of a pair of metal plates which are joined together. Each plate includes an angled section, a planar section extending from an outer edge of the angled section, and a curved section extending from an outer edge of the planar section. The plates are joined together at the planar sections. Each angled section is continuous.
1. A sheave capable of being used in an electrical stringing block for stringing a conductor to a tower or powerpole, comprising:
a pair of metal plates, each plate comprising an inner rim section having first and second edges and a length defined therebetween, an angled section having inner and outer edges and a length defined therebetween, a planar section having inner and outer edges and a length defined therebetween, and a curved section having inner and outer edges, the inner edge of the angled section extending from the second edge of the inner rim section at a corner, the outer edge of the angled section extending from the inner edge of the planar section, each angled section being continuous, the inner edge of the curved section extending from the outer edge of the planar section,
the plates being joined together at the planar sections and forming a central aperture therethrough which is defined by the inner rim sections, the first edges of the inner rim sections facing each other, the central aperture defining a centerline therethrough, wherein each inner rim section extends in a direction parallel to the centerline, wherein each planar section extends in a direction perpendicular to the centerline.
2. The sheave of claim 1 , wherein the angled section of each plate is frusto-conical along the entire length thereof.
3. The sheave of claim 1 , wherein the angled section of each plate is planar in cross-section along the entire length thereof.
4. The sheave of claim 1 , wherein the plates are joined together by any one or more of riveting, fastening, welding, adhesion.
5. The sheave of claim 1 , wherein each plate is formed by one of metal spinning, metal stamping, pressing, or forging.
6. The sheave of claim 1 , further comprising a non-conductive lining attached to the curved sections.
7. The sheave of claim 6 , wherein the non-conductive lining comprises one or more portions having a color that is different than other portions of the non-conductive lining.
8. An electrical stringing block for stringing a conductor to a tower or powerpole, comprising:
an axle;
at least one bearing mounted on the axle;
at least one metal sheave mounted on the axle by the at least one bearing, the sheave being rotatable relative to the axle, the at least one metal sheave comprising a pair of metal plates,
each plate comprising an inner rim section having first and second edges and a length defined therebetween, an angled section having inner and outer edges and a length defined therebetween, a planar section having inner and outer edges and a length defined therebetween, and a curved section having inner and outer edges, the inner edge of the angled section extending from the second edge of the inner rim section at a corner, the outer edge of the angled section extending from the inner edge of the planar section, each angled section being continuous, the inner edge of the curved section extending from the outer edge of the planar section,
the plates being joined together at the planar sections and forming a central aperture therethrough which is defined by the inner rim sections, the first edges of the inner rim sections facing each other, the axle being mounted through the central aperture, the central aperture defining a centerline therethrough, wherein each inner rim section extends in a direction parallel to the centerline, wherein each planar section extends in a direction perpendicular to the centerline;
the at least one bearing engaging with at least one of the inner rim sections of the plate; and
at least one support arm attached to the axle configured to support mounting the electrical stringing block to an associated tower or powerpole.
9. The electrical stringing block of claim 8 , wherein the angled section of each plate is frusto-conical along the entire length thereof.
10. The electrical stringing block of claim 8 , wherein the angled section of each plate is planar in cross-section along the entire length thereof.
11. The electrical stringing block of claim 8 , wherein each plate is formed by one of metal spinning, metal stamping, pressing, or forging.
12. The electrical stringing block of claim 8 , further comprising a non-conductive lining attached to the curved sections.
13. The electrical stringing block of claim 12 , wherein the non-conductive lining comprises one or more portions having a color that is different than other portions of the non-conductive lining.