GEOMETRIC PARAMETERS OF THE CLOCK DIAL

Rodoljub Milicevic ； Misa Stojicevic ； Branislav Popkonstantinovic ； Ivana Cvetkovic

《IETI Transactions on Ergonomics and Safety》 5卷1期 (2021/05) Pp. 15-23

https://doi.org/10.6722/TES.202105_5(1).0003

摘要

This paper deals with the geometric parameters required for the construction of a well-designed clock face as a part of pendulum wall clock described thoroughly in the master work. The face or dial of a clock is a circle whose circumference is divided into 60 equal parts, called minute spaces. A clock has two hands, the smaller one is called the hour hand or short hand while the larger one is called the minute hand or long hand. In order to determine the relation between the diameter of the clock and the distance from which one can clearly read position of its hands, it is necessary to adopt some of the basic geometric characteristics of minute and hour division on the clock face. Second important thing when it comes to the construction of a dial, is the height of the clock face. The criteria for dial height can be derived from the approved standards for the view field width of increased attention.

關鍵字

Clock ； mechanisms ； clock face geometry ； clock hands ； pendulum