The ball contact (6) is conductive.

The ball contact (6) and stationary contacts (8) form an electrical switch and are gold-plated.

The detection circuit detects a change of state of whether the electrical switch formed by the ball contact (6) and stationary contact (8) is opened or closed.

A socket (30a) is provided with a contact terminal (40a) electrically connected with a ball contact (101) provided on an electronic component (100) to be tested; and a housing (31a) for supporting the contact terminal (40a).

The motion sensor (1) may be a mechanical motion sensor (1) such as a tilt sensor having a ball contact (6) and stationary contacts (8).

The ball contact (6) is conductive.

A rolling bearing and a retainer for the rolling bearing.

Said flexible and resilient support means is such to urge said ball against said dispensing opening, achieving a leak tight engagement between said ball and said dispensing opening.

When the writing ball (10) is brought into contact with paper, etc., and the ballpoint pen (1) is moved, the writing ball (10) rotates smoothly due to the small area of contact with the rear side.

A ball valve includes a first ball clamping assembly that defines a first seat surface in contact with an exterior of the ball.

Each contact member electrically couples a solder ball on the BGA device to the PCB.

A multiple positioning assembly with integral switch contact includes a cylindrical housing along with a ball assembly including a ball portion received by the cylindrical assembly.

A ball retainer plug disposed within the ball retainer passageway to maintain engagement of the ball bearing with the respective cutter cone assembly and support arm.

A pinball machine which includes apparatus (20) attached to a game element (30) which, when contacted by the ball (16) during play of the game, will detect the contact of the ball (16).

Also included in the system is a ball received within the cup and in contact with the elastic portion and a femoral stem attached to the ball.