Ford credited the moving assembly line's idea to the overhead trolleys of Chicago meatpackers' 'disassembly' lines

In My Life and Work (1922), Henry Ford attributes the concept behind Highland Park's moving assembly line — installed in 1913 — to meatpacking, not to any prior automobile practice: "The idea came in a general way from the overhead trolley that the Chicago packers use in dressing beef." The borrowing is a clean inversion of purpose. The Chicago slaughterhouses ran a disassembly line, moving a carcass past stationary workers who each removed one part; Ford reversed the flow to move a chassis past workers who each added one part.

The conventional secondary history holds that Ford production staff — commonly named as William Klann — toured a Swift & Co. plant and carried the overhead-trolley technique back to Ford's production leadership before the line was built. That attribution is well-repeated but rests on Tier-4 sourcing here; the load-bearing, quotable claim is Ford's own acknowledgment of the meatpacking origin.

The note matters as the earliest link in a longer thread: quantifying and choreographing human motion for industrial efficiency is a habit that predates its 20th-century mechanization. It sits upstream of the Gilbreths' motion studies, which turned the same efficiency impulse from arranging work to measuring the worker's body — and, a century on, of wearable-motion AI such as Inertia-1.