Vintage Oak Industrial Cubby Storage Cabinet With Hinged Faces

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c. 1930s; Clarence E. Long Marine Engineering School - Milwaukee, Wisconsin

Mechanical marine engineering demonstrator constructed as an instructional display … Read more c. 1930s; Clarence E. Long Marine Engineering School - Milwaukee, Wisconsin

Mechanical marine engineering demonstrator constructed as an instructional display to illustrate the relationship between propeller rotation and internal valve or linkage motion. Mounted on a painted wooden backboard with integrated base and carry handle, the piece features a brass and steel linkage assembly connected to a small metal propeller. Turning the propeller drives the vertical mechanism, clearly showing coordinated movement through the sliding plates, levers, and pivots. The layout is intentionally exposed, allowing students or viewers to visually trace motion transfer in real time-an effective teaching aid for early marine engineering education.

A metal maker's plate at the lower right reads "Designed, Mfd. and Sold by Clarence E. Long, Marine Engineering School, Milwaukee, Wis." Clarence E. Long operated a specialized training school focused on marine and mechanical engineering, producing purpose-built instructional apparatus like this for classroom and demonstration use during the early 20th century. See less