Factory workers ate when the machines stopped, not when they were hungry.
Before the factory system, meals followed the rhythm of the work and the daylight. Agricultural laborers ate when the sun was highest. Craftsmen working in their own shops stopped when they chose.1
Early factories ran on continuous schedules synchronized to the power source, whether water wheel or steam engine. Stopping the machinery meant stopping production for everyone simultaneously. The midday break emerged as a practical concession, a pause dictated not by hunger but by the operating logic of industrial equipment.2
The 1833 Factory Act in Britain prohibited children under thirteen from working more than nine hours a day and required at least ninety minutes for meals.3 Subsequent legislation extended protections to adult workers. By the 1860s and 1870s, the fixed midday break had become a standard feature of factory life across industrial Britain.
The concept migrated from the factory floor to the office. As clerical work expanded in the late nineteenth and early twentieth centuries, the synchronized lunch break followed, even though office work had no machinery that required simultaneous stoppage.4
The word "lunch" itself only entered common English usage in the early nineteenth century, around the same time factory schedules were creating the social practice it described.5 The midday meal existed long before the industrial era. The fixed hour for it did not.