Historical Micrometer Caliper Diagram - Precision Measurement Instrument #116746 (License: Personal Use)

This black-and-white technical illustration depicts a precision micrometer caliper from the late 19th or early 20th century, featuring a graduated sleeve, rotating thimble with fine pitch, fixed anvil, and movable spindle. Annotations indicate measurement increments (e.g., 0-10 on the sleeve) and structural elements like the frame, lock nut, and ratchet stop. The design reflects pre-digital metrology standards used in machining and scientific instrumentation.

Used on educational, historical engineering, or metrology web pages to illustrate the evolution of precision tools; serves users researching instrument design, mechanical drawing, or industrial history.