Movement Checking Machine

Summary: 

A machine using a beam of light for checking the rate of balance wheel clocks and watches.

Patent Dates


Application Date: 

1927-09-01   

Issue Date: 

1932-03-08

Patent Numbers


Patent Number: 

1848520   

Serial Number: 

216915

Notes:

Westclox started putting a hole in the rim of their balance wheels to use this timing machine. They did this for many years.

Description: 

A rotating polygonaly faced mirror flashes a beam of light through an optical system. A hole in the balance wheel lets the light through when the hole passes by. If the balance wheel is in synchronization with the projected beams of light, the projected image of the light beam will be stationary on the display screen. If the balance is not in synchronization with the light beams, the project image will move across the screen.

Inventor Information: 

William Barton Eddison of Ardsley on Hudson, New York, Assignor to Western Clock Company , of Peru, Illinois, a Corporation of Illinois.

Patent Type: 

Utility

Patent Country: 

United States

Patent Category:

Clock & Watch Manufacturing

Patent Companies


Assignee: 

Western Clock Company 1912 to 1936   

User: 

Westclox

Patent Personnel


Inventor: 

Eddison, William   

Attorney: 

Neureuther, Andrew

Patent URLs:

U.S. Patent Database; Google Patents