div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=abb-group-the-ward-leonard-system-proved-to-be-a-much-improved-speed-controlhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: ABB Groupthe Ward-Leonard system proved to be a much improved speed control for mine hoists ABB supplied such a system as early as 1904 However the Ward-Leonard sys- tem had loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentsusreader034viewer20220501105f47787186234b4fa85cec25html5thumbnails1jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=2Page 2button div class=ts-imageimg data-url=abb-group-the-ward-leonard-system-proved-to-be-a-much-improved-speed-controlhtmlpage=2 data-page=2 class=ts-thumb lazyload alt=Page 2: ABB Groupthe Ward-Leonard system proved to be a much improved speed control for mine hoists ABB supplied such a system as early as 1904 However the Ward-Leonard sys- tem had loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentsusreader034viewer20220501105f47787186234b4fa85cec25html5thumbnails2jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=3Page 3button div class=ts-imageimg data-url=abb-group-the-ward-leonard-system-proved-to-be-a-much-improved-speed-controlhtmlpage=3 data-page=3 class=ts-thumb lazyload alt=Page 3: ABB Groupthe Ward-Leonard system proved to be a much improved speed control for mine hoists ABB supplied such a system as early as 1904 However the Ward-Leonard sys- tem had loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentsusreader034viewer20220501105f47787186234b4fa85cec25html5thumbnails3jpg width=140 height=200 divdivdiv class=ts-pagebutton class=gotoPage data-page=4Page 4button div class=ts-imageimg data-url=abb-group-the-ward-leonard-system-proved-to-be-a-much-improved-speed-controlhtmlpage=4 data-page=4 class=ts-thumb lazyload alt=Page 4: ABB Groupthe Ward-Leonard system proved to be a much improved speed control for mine hoists ABB supplied such a system as early as 1904 However the Ward-Leonard sys- tem had loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentsusreader034viewer20220501105f47787186234b4fa85cec25html5thumbnails4jpg width=140 height=200 divdiv