The Patent

The Starley"Eye-Opener" is probably based on patents granted in Great Britain, France and the USA.

The patent specifications are numbered 4418 (UK), 318.842 (FR) and 746.652 (USA). The French patent was granted in 1902, but refers to the British patent, which was only published in 1903. The US patent also dates from 1903.

The principle drawing (Fig. 1) corresponds to the realized motorcycle.

Legend: A Engine; A1 Crank and flywheel housing; B Transmission housing; C Worm gear housing; F Chain stay; G Front sprocket; H Rear sprocket; J Rear wheel of motorcycle

Legend: Fig.2: Side cut 2-speed gearbox and worm drive
Fig.3 Final view of the connected housings for 2-speed gearbox and worm drive
Fig.4, 5 and 6 Sectional views on the lines Z - Z1, Y - Y1 and X - X1 of Fig. 2

Legend: A1 crank and flywheel housing; B gear housing; C worm gear housing; F and F1 chainstays; G front sprocket

Not anchored in the patent specification, but can be found at Accles: Illustration of an engine which could correspond to that used for the motorcycle.