Dictionary.net

• Without end, applied both to length or space, and duration or time; everlasting, infinite, or unlimited; never ending or ceasing; never leading to any result. The endless screw, a screw combined with a wheel and axle, so that the threads of the screw work into the teeth fixed on the periphery of the wheel. The endless chain, a perpetually revolving chain, much used in machinery. The endless tape, the connecting-band for certain light machinery.

1914 - Nuttall's Standard dictionary of the English language
By Nuttall, P.Austin.