Uploaded February 2026 | Updated September 2026, 2 weeks ago

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Marketed by the Martin-Decker Corporation of Long Beach, California, this device was used to measure the tension of control cables in aircraft such as the Douglas DC-4 / Canadair North Star.

SOURCES

patents.google.com/patent/US1780141A/en

patents.google.com/patent/US1766782A/en?inventor=Goldman+Otto+Berger

patents.google.com/patent/US3541850A

nov.com/products-and-services/brands/md-totco