A flexure hinge with two material segments connected to each other via a material tapering to a thin spot which defines a pivot axis between the two material segments. The material segments are provided with recesses such that the strength existing in the thin spot with respect to normal stresses or bending stresses is kept largely constant within a distance from the thin spot.

A flexure hinge with two material segments connected to each other via a material tapering to a thin spot which defines a pivot axis between the two material segments. The material segments are provided with recesses such that the strength existing in the thin spot with respect to normal stresses or bending stresses is kept largely constant within a distance from the thin spot.

A second generation NIST Kibble balance includes: a main body including a main body fulcrum node; a lever bar in mechanical communication with the main body and that pivots about the main body fulcrum node; a central flexural bridge in flexural mechanical communication with the main body and the lever bar; a measurement mass arm mechanically coupled to the main body via the lever bar, the central flexural bridge, and a mass arm flexural bridge; the mass arm flexural bridge in flexural mechanical communication with the measurement mass arm and the lever bar; a reference force arm mechanically coupled to the main body via the lever bar, the central flexural bridge, and a reference arm flexural bridge; and the reference arm flexural bridge in flexural mechanical communication with the reference force arm and the lever bar.

A flexure hinge with two material segments connected to each other via a material tapering to a thin spot which defines a pivot axis between the two material segments. The material segments are provided with recesses such that the strength existing in the thin spot with respect to normal stresses or bending stresses is kept largely constant within a distance from the thin spot.

A flexure hinge with two material segments connected to each other via a material tapering to a thin spot which defines a pivot axis between the two material segments. The material segments are provided with recesses such that the strength existing in the thin spot with respect to normal stresses or bending stresses is kept largely constant within a distance from the thin spot.

A second generation NIST Kibble balance includes: a main body including a main body fulcrum node; a lever bar in mechanical communication with the main body and that pivots about the main body fulcrum node; a central flexural bridge in flexural mechanical communication with the main body and the lever bar; a measurement mass arm mechanically coupled to the main body via the lever bar, the central flexural bridge, and a mass arm flexural bridge; the mass arm flexural bridge in flexural mechanical communication with the measurement mass arm and the lever bar; a reference force arm mechanically coupled to the main body via the lever bar, the central flexural bridge, and a reference arm flexural bridge; and the reference arm flexural bridge in flexural mechanical communication with the reference force arm and the lever bar.