US 4,535,542 A · Vernier gauge

Abstract

A vernier gauge has three arc members, two flat pieces and two sliding pieces. A second arc member is slidably engaging with a first arc side of a first arc member from a first end of the first arc member and a third arc member is slidably engaging with a second arc side of the first arc member from a second end of the first arc member. Each of two free ends of the second and third arc members is actively attached one of the two flat pieces each of which is slidably engaged with one of the two sliding pieces. The second, third arc members and the two flat pieces are provided with main scales and the first arc member and the two sliding pieces are provided with corresponding vernier scales. Each of the two sliding pieces is further provided with two opposite tips and a flat surface. Such gauge can permit accurately fractional readings of angles as well as inner or outer diameters of objects and of depths of objects when the flat piece is solely used.

Claims24

Dependent claims

A vernier gauge comprising:

a first arc member having a free end and a clamped end;
and said first arc member having radially inner and outer sides, a second arc member also having a free end and a clamped end as well as inner and outer sides, said second arc member slidably engaged with said first arc member and provided with a first scale, said first and second arc members defining a free space at the center, whereby the stretched angle between the two free ends of said first and second arc members can be read from said first scale and wherein a first vernier scale on said second arc member is placed along said first scale to permit accurate fractional reading.

Dependencies are inferred from the claim text.

Vernier gauge

Life of this patent

Vernier gauge

Life of this patent

Abstract

Claims24