[irreg. f. Gr. σύγχρονος SYNCHRONOUS + -γραφος -writing, -GRAPH, after chronograph.] An automatic recording telegraph worked by an alternating electric current, with a synchronously moving strip of perforated paper.
1897. Westm. Gaz., 24 April, 7/2. Professor Crehore … has invented a wonderful instrument, called the synchronograph, by which he claims that 3,000 words per minute can be telegraphed, received, and automatically recorded.
1897. Sci. Amer., 9 Oct., 231/3. Experiments with the synchronograph, recently conducted in England.
