Abstract: A curvature adaption mechanism to be incorporated with a capo (10) for use with a guitar includes a cam surface (16, 17, 19) and associated cam follower surface (12) located behind a string contact surface (11). A curvature of the guitar fingerboard and strings can be adopted by the string contact surface (11) by virtue of cams engaging and providing a feedback force (D).

Abstract: A capo (10) suitable for a twelve string guitar, where string pairs of different gauges are used. The capo (10) includes a clamp arm (11) with a contact surface (12) for contacting the strings that includes a plurality of inclined portions (18) relative to a lateral extent of the clamp arm (11). The nature of the inclined portions (18) is such that adjacent strings (1st to 6th) of different gauges can be contacted with relatively even pressure upon the fingerboard (21).

Abstract: A capo (10) for use with a stringed instrument comprises a top arm (12), lower arm (16) and a lever arm (24). The top arm (12) is adapted to extend across a fingerboard of the instrument above the strings (4), and a side arm is connected and extending at an angle to the top arm and arranged to extend generally laterally of the neck (2) of the instrument. The lower arm (18) has one end pivotally attached to the side arm (16) at a lower arm pivot (20) and is adapted to abut against the back of the neck of the instrument when in a closed position. The lever arm has one end pivotally attached to the side arm (16) at a pivot (26) spaced from the lower arm pivot (20). The capo further includes an adjuster mechanism (28, 334) that extends and projects an adjustable amount from the lever arm (24) and has an end tip (32) which bears against the lower arm (24).

Abstract: A capo for use with a stringed instrument having a plurality of strings a neck comprising a fingerboard and a back comprises a string-engaging arm, a clamping arm, and a pivotal connection to pivotally interconnect a string-engaging arm and clamping arm. The string-engaging arm adapted to in use extend across the fingerboard above the strings and in use press against the strings. The clamping arm is adapted to, in use, extend across engage the back of the neck. The pivotal connection is disposed, in generally towards one side of the neck and at a position behind the fingerboard inboard of a side edge of the fingerboard. This arrangement and location of the pivotal connection reduces the forces required in use to operate the capo.