Submarine Signal Company stock certificate 1936 (fathometer)
Neat maritime collectible. Fantastic vignette of a steam ship operating in heavy seas.. Issued and cancelled. Dated 1936.
The Submarine Signal Company (SSC) was established in 1901 in Boston, MA, and was the first commercial enterprise organized to conduct underwater sound research and to develop equipment to be used for increasing safety of navigation. The initial product line (prior to 1914) included underwater bells for shore based stations, buoys, and lightships, as well as encased microphones for sound detection on the ships.
The bells were used for navigational and hazard warning purposes. In April 1912, future SSC President H. J. W. Fay had a chance meeting with Professor Reginald Fessenden at a Boston railroad station. This meeting led to an invitation for a Fessenden visit to SSC where upon Reginald so impressed company managers and engineers that SSC hired Fessenden consulting services to redesign their hydrophones. Developments led to today's fathometer (first commercially used in 1924). In 1946, the company merged with the Raytheon Company.