Improvement in Needle-Threaders for Sewing-Machines.
Description:
Patent for improvement in needle-threaders for sewing machines by using an “eyelet-frame that formed by two equal parallelopipeds. These parallelopipeds are being kept together by two springs and may be separated by pressing the pins toward each other.” (Lines 32-35) “The axis of a conical eyelet will be laid in the joint planes of the parallelopipeds, its apex in the front side, its basis in the opposite side of the eyelet-frame, through which eyelet the thread has to pass when the instrument…
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Date:
April 20, 1869
Creator:
Thielepape, Wilhelm C. A.
Item Type:
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Partner:
UNT Libraries Government Documents Department