Time clock
A time clock, sometimes known as a clock card machine or punch clock or time recorder, is a mechanical (or electronic) timepiece used to assist in tracking the hours worked by an employee of a company.
History of time clocks
20th century
- Time clock, 1909
- Time clock, 1909
- Time stamp, 1909
- 1909
- 1920
- 1928/2010
- 1942/43
- 1942/43
- 1942/43
- 1946
- 1948
Early clocks in musea, undated
21st century
- 2008
- 2011
Time clocks in practice
- 1940
- 1948
- 1946
- 1973
- 1973
- 1973