Improved large diaphragm or cone reproducer applicable for use in gramophones and loud speakers

摘要

327,776. Jeffery, W. G., and Jeffery, W. J. Jan. 22, 1929. Diaphragms.-The conical or other shaped diaphragm A for use in a talking machine or loudspeaker is supported on a rubber, felt &c. cushion C in a frame B by means of a number of elastics, tapes, ligaments &c. E stretched across the frame and preferably reposing in slots D cut out from the edge of the cone.