div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentabb-group-the-ward-leonard-system-proved-to-be-a-much-improved-speed-controlhtmlpage=1 data-page=1 class=trans-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:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220501105f47787186234b4fa85cec25html5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentabb-group-the-ward-leonard-system-proved-to-be-a-much-improved-speed-controlhtmlpage=2 data-page=2 class=trans-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:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsinreader034viewer20220501105f47787186234b4fa85cec25html5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentabb-group-the-ward-leonard-system-proved-to-be-a-much-improved-speed-controlhtmlpage=3 data-page=3 class=trans-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:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...