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Longman Dictionary of Contemporary English
time clock
noun
EXAMPLES FROM CORPUS
▪ A pseudo-variable which reads and sets the elapsed time clock.
▪ Alternatively, a single softner operating on a time clock and regenerating during the night may be the best solution.
▪ Baby schedules did not fit any time clock.
▪ Dear Help Wanted: We punch a time clock and our employer has a rigid lateness policy.
▪ Ensure that you are familiar with any heating controls the system may have such as a time clock or programmer.
▪ I was not looking at a time clock or hours.
▪ If there were a time clock for murder, it would show one every twenty-six minutes.
▪ The building had no water and the scoreboard had no time clock.
Wiktionary
time clock

n. A device that records, on timecards, the times that employees start and finish work.

WordNet
time clock

n. clock used to record the hours that people work

Wikipedia
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.

In regard to mechanical time clocks this was accomplished by inserting a heavy paper card, called a time card, into a slot on the time clock. When the time card hit a contact at the rear of the slot, the machine would print day and time information (a timestamp) on the card.

One or more time cards could serve as a timesheet or provide the data to fill one. This allowed a timekeeper to have an official record of the hours an employee worked to calculate the pay owed an employee.

The terms Bundy clock, bundy clock, or just bundy have been used in Australian English for time clocks. The term comes from brothers Willard and Harlow Bundy.

Usage examples of "time clock".

If that clock is right, it will be only a few minutes before the time clock will operate.

It has I don't know how many K of random access memory on hard disk, plus a real-time clock and all the extra goodies anyone might possibly want.

A receiver was wired up to a commercial time clock, so if the walkie-talkie emerged when we weren't there to observe it, we at least knew when it happened.

Sisko's internal time clock, calibrated by years of shipboard service, told him this should be the daylight shift back at the station.

He let the throng carry him past the time clock and over to the elevators.

It wasn't my fault that I was mad with anger, that my vision was so blurred and indistinct that I could scarcely decipher my own notes, that my right hand-I did practically everything with my right hand-was shaking so badly that I had great difficulty in adjusting the time clock, in feeding cables through their allotted grooves, in fitting the fuses into place in the bases of the solid fuel cylinders: it wasn't my fault that, when arming the sixty pound disruptive charge, my sweating hand dropped a fulminate of mercury, detonator that went up with so white a flash and so loud an explosion that it was touch and go whether Hewell, who was supervising the operation, pressed the trigger of the pistol he had lined up on me.