Description: Patent for a new and improved button. This design consists "[i]n a detachable button, the combination, with the hollow threaded shank of the button-head, having end serrations, and the base-disk, having a central screw, of the loose clamp-disk, applied on the screw, and having a spring-pawl or projection to engage the serrations of the shank" (lines 70-76).
Date: March 11, 1884
Creator: Matthews, William H.
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