초록 ▼

A diameter gauge is disclosed for measuring the outside diameter of a part having a circular cross-section. The gauge comprises two arms converging to form a channel, a light source and a light detecting device. The part to be measured is placed within the channel, partially blocking or reflecting t

A diameter gauge is disclosed for measuring the outside diameter of a part having a circular cross-section. The gauge comprises two arms converging to form a channel, a light source and a light detecting device. The part to be measured is placed within the channel, partially blocking or reflecting the transmission of light from the light source. The diameter of the part is determined from the location of the part shadow or reflected light.

대표청구항 ▼

Apparatus for measuring the outside diameter of a part having a circular cross section, comprising: first and second arms extending outward from a common support, said arms including a pair of mutually facing, planar contact surfaces converging to define a dihedral angle, each of said contact surfac

Apparatus for measuring the outside diameter of a part having a circular cross section, comprising: first and second arms extending outward from a common support, said arms including a pair of mutually facing, planar contact surfaces converging to define a dihedral angle, each of said contact surfaces being oriented to make contact at a line of tangency with said part when said part is positioned between said arms for a diameter measurement; means for projecting light in a predetermined direction, said light projection means extending along one of said first and second arms to provide a substantially uniform light output throughout the length of said one arm to cause said light to be at least partially blocked by said part when the latter is in position for said diameter measurement; means for locating an edge of a shadow cast by said part; and means for determining the diameter of said part from the location of the edge of said shadow.