Up: Patent Index

595,261 · Basquin · "Device for Selecting Prisms Having Proper Angles" · Page 3 Home  > Prism Glass  > Patent Index  > Page 3

595,261: 3 of 5

indicate the angle of the prism when the pointers are set for given conditions.     6. A device for measuring the angles of prisms, comprising a graduated arc, two pointers or indicators pivotally connected with the center about which said arc is described and adapted to move along a common scale, one of said pointers adapted to indicate the angle at which the light is received and

the other the angle at which it leaves the prism, a device for indicating the index of refraction of the glass connected with said pointers and an indicator for indicating the angle of the prism when said pointers are set. OLIN H. BASQUIN. Witnesses:     DONALD M. CARTER,     HOMER L. KRAFT.