Self winding clock

Title

Self winding clock

Subject

Astronomy
Clocks
Measuring instruments

Description

Wood, metal, glass

Purchased by the Astronomy Club in 1985 at an estate sale, the clock was missing the dial and door but still retained the wooden case, paper instructions, wires, hands, pendulum, and clock mechanism. In 2011, Dr. Bruce Hannon restored the clock adding a replacement door and dial, and updating the battery connections. During the restoration he discovered the pendulum regulating solenoid was missing. Serial number engraved on the clock mechanism is 112040. Dates to 1917.

Self Winding Company clocks were accurate spring-driven, pendulum regulated, clock. Batteries powered an electromagnetic winding mechanism. In addition, a signal from an external source, usually Western Union telegraphic signals, helped regulate the pendulum keeping the time in synchronization with a standard clock. Western Union received the time signal from the US Naval Observatory. The pendulum movement is accurate to an error less than 1 minute per week, so the Western Union telegraphic signal could correct and eliminate the error.

Creator

Self Winding Clock Company, New York

Publisher

Astronomy Department, University of Illinois, Urbana, Illinois

Date

circa 1917

Contributor

Michael Svec

Rights

Copyright Michael Svec

Format

still image of artifact

Language

English

Type

physical object

Coverage

University of Illinois Observatory, Urbana, Illinois

Files

Self winding clock
DSCN0264.JPG
DSCN0458.JPG

Collection

Tags

Citation

Self Winding Clock Company, New York, “Self winding clock,” University of Illinois Observatory Collection, accessed November 19, 2017, http://uiobservatory.omeka.net/items/show/60.