Improvements in and relating to sextant type instruments for marine navigation

摘要

607,474. Sextants. HUGHES & SON, Ltd., H., EVERITT, P. F., BATES, F. W., and HUGHES, A. J. Feb. 5, 1946, No. 3644. [Class 97 (ii)] The index arm g co-operates only with the external periphery b of the limbs c without contacting the arcuate scale d. As shown, a curved pin h on the arm g engages a groove a on the limb c. The central part of the curved pin may be omitted.