Improved Means for Adjusting and Fixing the Prisms in Prismatic Field and Opera Glasses and Telescopes.

摘要

16,996. Ross (Limited), [Warner & Swasey]. Sept. 24. Telescopes &c.- Relates to a means for adjusting the prism A in prismatic telescopes and opera and field glasses. A slotted plate C has a projection c engaging a groove a in the prism ; the plate can be moved in a recess in the body B to the required position for adjustment, and can then be clamped by means of a screw d.