Cable-clamp

• US 4,501,400 A
• Filed: 12/10/1981
• Issued: 02/26/1985
• Est. Priority Date: 12/10/1981
• Status: Expired due to Fees

• Current Assignee: Thomas & Betts International Incorporated (ABB Limited)
• Original Assignee: Diamond Communication Products Incorporated
• Inventors: Leonardo, Ignazio
• Primary Examiner(s): Schultz, William H.
• Assistant Examiner(s): Ramirez, Ramon O.
• Application Number:
  US06/329,410
• Time in Patent Office: 1,174 Days
• Field of Search: 248/74.3, 248/74.8, 248/74.7, 248/74.1, 248/73, 248/544, 248/259, 248/219.3, 248/316 R
• US Class Current: 248/74.1
• CPC Class Codes: F16L 3/08 substantially surrounding the pipe, cable or protective tubing
• CPC Class Codes: H02G 7/053 Suspension clamps and clips for electric overhead lines not suspended to a supporting wire

Abstract

The invention contemplates a unitary cable-clamp fitting adapted for clamped above-ground suspension of a cable from a telephone pole or the like. The fitting comprises two elongate side panels integrally connected by an elongate single bend, establishing an initially acute angle between the side panels. The outer longitudinal edge of each panel is characterized by an elongate flange bent inward and generally toward the opposed side panel, at an acute angle to its associated side panel. The initial space between flanges is slightly less than the cable diameter to be accommodated, so that cable assembly and loose retention are achieved via snap-action insertion between the flanges. Bolts spanning aligned apertures in the side panels enable secure clamping to, and lug-retention against loss of, an inserted cable.

Claims

1. A cable-suspension fitting for clamped suspension of a given-diameter cable from a telephone pole or the like, comprising a unitary elongate stiff metal clamp having two elongate side panels integrally connected via a single longitudinal bend and divergent at an acute angle to their outer longitudinal edges, each side panel having at its outer longitudinal edge an inwardly bent flange of width less than side-panel width and oriented at an acute angle to its associated side panel, the inner limiting edges of said flanges being spaced from each other to an extent slightly less than said given diameter, whereby said clamp may be applied to the cable with snap action via the space between said flanges, said side panels having plural longitudinally spaced bolt apertures at corresponding locations between the longitudinal bend and the flanges, there being a clear unimpeded alignment of single geometric elongate cylindrical shape through both of the corresponding apertures of each pair, whereby a bolt through each pair of corresponding apertures may be set with a coacting nut to draw said panels to each other in clamped engagement with the cable and with said flanges establishing a permanent barrier against loss of the cable from the fitting.

2. The fitting of claim 1, in which each of said panels has a longitudinally central mounting aperture, said bolt apertures being at longitudinally symmetrical offsets from said mounting apertures.

3. The fitting of claim 1, in which each bolt aperture is square, for keyed reception of a carriage bolt.

4. The fitting of claim 3, in which each bolt aperture has two opposed edges extending transversely of its side panel, at least one transverse edge of each bolt aperture of one panel being defined by the inward bend of a lug projecting toward the other panel.

5. The fitting of claim 4, in which said aperture lugs of one panel are in staggered interlace with the aperture lugs of the other panel.

6. The fitting of claim 1, in which the inside radius of the longitudinal bend which connects said panels is of slightly less than the cable radius, whereby when bolt-clamped to the cable, said panels are in substantially parallel relation.

7. The fitting of claim 1, in which each panel has a plurality of transverse stiffening-rib formations at longitudinal locations on opposite sides of said bolt apertures.

8. As an article of manufacture, the fitting of claim 2 with an engaged nut and associated bolt spanning each pair of corresponding bolt apertures, said nut-and-bolt engagements being initially less than sufficient to reduce the space between said flanges, whereby the complete fitting may be assembled by snap action to the cable and may be loosely flange-retained against separation from the cable, until an installer becomes satisfied with the sling of the cable and sets the bolts to secure the sling.

9. The article of claim 8, in which the bolt apertures are square and the bolts are carriage bolts having keyed engagement to the square openings.

10. The fitting of claim 1, in which the metal of said clamp is cold-rolled steel.

13. The fitting of claim 1, in which each of said flanges forms an acute angle with its associated side panel.

14. The fitting of claim 1, in which each of said flanges is folded back against the inner surface of its associated side panel.

11. A cable-suspension fitting for clamped suspension of a given-diameter cable from a telephone pole or the like, comprising a unitary elongate stiff metal clamp having two elongate side panels integrally connected via a single longtudinal bend and divergent at an acute angle to their outer longitudinal edged, each side panel having at its outer longitudinal edge an inwardly bent flange of width less than side-panel width and oriented at an acute angle to its associated side panel, the inner limiting edges of said flanges being spaced from each other to an extent slightly less than said given diameter, whereby said clamp may be applied to the cable with snap action via the space between said flanges, said side panels having a longtidinally central mounting aperture and plural longitudinally spaced bolt apertures at corresponding locations which are between the longitudinal bend and the flanges and which are at longitudinally symmetrical offsets from said mounting apertures, whereby a bolt through each pair of corresponding apertures may be set with a coacting nut to draw said panels to each other in clamped engagement with the cable and with said flanges establishing a permenant barrier against loss of the cable from the fitting, and each central mounting aperture being D-shaped, with an integral inturned lug extending from the straight leg of the D-shape.

12. The fitting of claim 11, in which the straight legs of the respective D-shapes are on opposite longitudinal sides of the associated D-shaped opening.

15. A suspension-cable fitting for clamped assembly in combination with a given-diameter longitudinally extending messenger wire or the like cable, comprising a unitary stiff metal clamp having two side panels integrally connected via a single longitudinal bend and divergent at an acute angle to their outer longitudinal edges, each side panel having at its outer longitudinal edge a reversely and inwardly bent flange of length less than side-panel length and oriented at an acute angle to its associated side panel, the inner limiting edges of said flanges being spaced from each other to an extent slightly less than said given diameter, whereby said clamp may be applied to the cable with snap action via the space between said flanges, each of said side panels having a bolt-shank aperture at corresponding locations and on an alignment spanning the space between side panels and at offset from the associated one of said flanges, said offsets between the bolt-shank aperture alignment and the reversely bent flanges being substantially equal to the cable diameter, whereby a bolt-shank through said apertures may be set with a coacting nut to draw said panels to each other in clamped engagement with the cable and with said flanges trapping the cable and establishing a permanent barrier against loss of the cable from the fitting.

16. A suspension-cable fitting for clamped assembly in combination with a given-diameter longitudinally extending messenger wire or the like cable, comprising a unitary stiff metal clamp having two side panels integrally connected via a single longitudinal bend and divergent at an acute angle to their outer longitudinal edges, each side panel having at its outer longitudinal edge a reversely and inwardly bent flange of length less than side-panel length and oriented at an acute angle to its associated side panel, the inner limiting edges of said flanges being spaced from each other to an extent slightly less than said given diameter, and an engaged nut and bolt with the shank of the bolt through said apertures, said reversely bent flanges being offset from the bolt shank to substantially the extent of the cable diameter, whereby the nut and bolt may be set to draw said panels to each other in clamped engagement with the cable and with said flanges trapping the cable and establishing a permenant barrier against loss of the cable from the fitting.