Vintage Optical Instrument Diagram - Labeled Mechanical Design for Precision Use #2315653 (License: Personal Use)

This black-and-white patent-style illustration depicts a precision optical instrument-likely a telescope eyepiece mount or sighting apparatus-with clearly numbered mechanical parts including a threaded barrel (31), adjustable knurled knobs (26, 30), a central housing (14), and a large objective lens (16) with concentric grid detailing. The diagram emphasizes functional assembly, with levers (28, 33) and securing screws (24, 29) indicating fine-tuning capability. Such schematics were common in early optical engineering documentation for manufacturing and repair.

Used on educational, historical, or technical documentation pages-e.g., museum archives, patent databases, or engineering blogs-to illustrate mechanical design principles of vintage optics. Matches user intent for research, restoration, or academic study of pre-digital instrumentation.