Trolley Harp Wheel and Contact Brushes, (1 folder, ca. 1890)
Drawing
The diagram provides a sectional view of the trolley wheel assembly, showing the internal components.
Handwritten annotations label key components, including the axle journal, trolley frame, hub spring contact, and friction feed.
The notations suggest a mechanical analysis, possibly related to a patent dispute or mechanical failure analysis.
The number "94" is written in the lower right corner, likely indicating a reference or exhibit number in a larger collection.
The paper appears aged, with creases and slight discoloration.
Technical Drawing - Sectional View of Trolley Wheel & Contact Brushes
This is a hand-drawn technical diagram of a trolley wheel system, labeled as a defendant's exhibit in what appears to be a legal or engineering dispute. The drawing includes detailed labels and annotations describing various parts of the wheel, axle, and contact brushes.The diagram probably relates to Lewis Latimer’s work as an expert witness in patent infringement lawsuits for his employer, Thomas Edison.
The Lewis H. Latimer Papers (1870-1929, 1972) [QPL Subgroup]Latimer Family Papers (1870-1996 ) [QPL Full Collection]
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Latimer Family Papers (1870-1996 ) QPL Collection
Queens Borough Public Library
JamaicaQueens
New York, USA
North America
United States