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A clamp includes first and second clamp members having first and second inner surfaces with first and second clamping surfaces and first and second hinge portions joined for pivoting movement about a first axis across a range of clamping positions. A fastener extends through first and second access

A clamp includes first and second clamp members having first and second inner surfaces with first and second clamping surfaces and first and second hinge portions joined for pivoting movement about a first axis across a range of clamping positions. A fastener extends through first and second access bores of the first and second clamp members for threaded engagement with a nut. The first and second access bores are elongated to permit pivoting movement of the shaft portion with respect to each of the first and second clamp members.

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1. A clamp comprising: a first clamp member including a first inner surface having a substantially planar first clamping surface and a first hinge portion, and a first access bore extending from the first inner surface to a first outer surface opposite the first inner surface;a second clamp member i

1. A clamp comprising: a first clamp member including a first inner surface having a substantially planar first clamping surface and a first hinge portion, and a first access bore extending from the first inner surface to a first outer surface opposite the first inner surface;a second clamp member including a second inner surface having a cylindrical second clamping surface facing the first clamping surface and a second hinge portion, joined with the first hinge portion for pivoting movement of the second clamp member with respect to the first clamp member about a first axis across a range of clamping positions, and a second access bore extending from the second inner surface to a second outer surface opposite the second inner surface;a nut adjacent to the second outer surface and including a threaded bore aligned with the second access bore; anda fastener including a head portion adjacent to the first outer surface and a threaded shaft portion extending through the first and second access bores for threaded engagement with the threaded bore of the nut;wherein the first and second access bores are elongated to permit pivoting movement of the shaft portion with respect to each of the first and second clamp members; andwherein the cylindrical second clamping surface has a central axis that is parallel to the first axis and distal to the first clamping surface, to provide a uniform band of engagement between the second clamping surface and any one of a plurality of flat structures having a range of thicknesses corresponding to the range of clamping positions, when clamped between the first and second clamping surfaces. 2. The clamp of claim 1, wherein the head portion of the fastener includes an arcuate seating portion complementary to and received within an arcuate recessed seat disposed in the first outer surface of the first clamp member, wherein the arcuate seating portion and the arcuate recessed seat are contoured to permit sliding rotation of the head portion about a second axis parallel to the first axis and to provide uniform seating engagement across the range of clamping positions. 3. The clamp of claim 2, wherein the arcuate seating portion is semi-cylindrical. 4. The clamp of claim 2, wherein the fastener includes a bolt and a washer, with the arcuate seating portion being disposed on the washer. 5. The clamp of claim 4, wherein each of the arcuate seating portion and the arcuate recessed seat are semi-cylindrical, thereby preventing rotation of the washer about a rotational axis of the bolt. 6. The clamp of claim 1, wherein the nut includes an arcuate seating portion complementary to and received within an arcuate recessed seat disposed in the second outer surface of the second clamp member, wherein the arcuate seating portion and the arcuate recessed seat are contoured to permit sliding rotation of the nut about a second axis parallel to the first axis and to provide uniform seating engagement across the range of clamping positions. 7. The clamp of claim 6, wherein the arcuate seating portion is semi-cylindrical. 8. The clamp of claim 6, wherein the arcuate seating portion and the arcuate recessed seat are both semi-cylindrical, thereby preventing rotation of the nut about a rotational axis of the bolt. 9. The clamp of claim 1, wherein the first hinge portion comprises a socket and the second hinge portion comprises a stem and a bead extending from the stem and retained within the socket. 10. The clamp of claim 9, wherein the range of clamping positions is limited by engagement of the stem with an edge portion of the socket. 11. The clamp of claim 1, wherein the range of clamping positions is limited by engagement of the fastener with one of the first and second access bores. 12. A method of attaching a material to a frame member having first and second opposed flat parallel sides extending to an edge, the method comprising: providing a clamp comprising first and second clamp members pivotally joined at a first end, the first and second clamp members including opposed first and second clamping surfaces at a second end opposite the first end, the first clamping surface being substantially planar and the second clamping surface being arcuate with a radius of curvature about a second axis parallel to the first axis and distal to the first clamping surface;engaging the first flat side of the frame member with the first clamping surface, such that the edge of the frame member abuts a projection disposed on an inner surface of the first clamp member;pivoting the second clamp member about a first axis parallel to the edge of the frame member to a clamping position to engage the second clamping surface with the second flat side of the frame member;tightening a clamping fastener installed through aligned first and second access bores in the first and second clamp membersto secure the second clamp member in the clamping position; andsecuring the material to an attachment feature disposed on an outer surface of the first clamp member;wherein pivoting the second clamp member about the first axis to the clamping position provides a uniform band of engagement between the second clamping surface and the second side of the frame member when the second clamp member is pivoted to the clamping position. 13. The method of claim 12, wherein installing the clamping fastener through the aligned access bores in the first and second clamp members comprises inserting a threaded bolt through a washer in seating engagement with the outer surface of the first clamp member and through the first and second access bores, and threadingly engaging a nut in seating engagement with an outer surface of the second clamp member. 14. The method of claim 13, wherein the washer includes an arcuate seating portion complementary to and received within an arcuate recessed seat disposed in the outer surface of the first clamp member, wherein the arcuate seating portion and the arcuate recessed seat are contoured to permit sliding rotation of the washer about a second axis parallel to the first axis and to provide uniform seating engagement across a range of clamping positions. 15. The method of claim 13, wherein the nut includes an arcuate seating portion complementary to and received within an arcuate recessed seat disposed in the outer surface of the second clamp member, wherein the arcuate seating portion and the arcuate recessed seat are contoured to permit sliding rotation of the nut about a second axis parallel to the first axis and to provide uniform seating engagement across a range of clamping positions. 16. The method of claim 12, wherein the attachment feature comprises a snap member. 17. The method of claim 12, wherein the projection comprises a shoulder extending across a width of the first clamp member. 18. In combination, a clamp secured to a frame member having first and second opposed flat parallel sides extending to an edge, the clamp comprising: a first clamp member including a first inner surface having a first hinge portion and a substantially planar first clamping surface engaging the first flat side of the frame member, the first clamping surface extending to a projection disposed on the first inner surface, the projection abutting the edge of the frame member;a second clamp member including a second inner surface having an arcuate second clamping surface engaging the second flat side of the frame member, and a second hinge portion pivotally joined with the first hinge portion for pivoting movement of the second clamp member with respect to the first clamp member about a first axis across a range of clamping positions, the arcuate second clamping surface having a radius of curvature about a second axis parallel to the first axis and distal to the first clamping surface, to provide a uniform band of engagement between the second clamping surface and the second side of the frame member;a clamp fastening mechanism installed through aligned access bores in the first and second clamp members to secure the first and second clamp members in clamping engagement with the frame member; andan attachment feature disposed on an outer surface of the first clamp member for securing a material to the frame member. 19. The combination of claim 18, wherein the attachment feature comprises a snap member riveted to the first clamp member. 20. The combination of claim 18, wherein the projection comprises a shoulder extending across a width of the first clamp member. 21. The combination of claim 18, wherein the arcuate second clamping surface includes a cylindrical surface.