Electric elevators of modern design; winding machine and ropes; location of lift machines; cars; car slings; car safety gear and speed governor; balance weights; landing doors; locks; methods of control operating devices; indicator systems; d.c. controllers; pushbutton controllers; a.c. and two-speed a.c. controllers; micro-controllers; gearless traction and variable voltage control; controllers for lifts in ships. (see also Machy. Market, nos. 1490, 1491 and 1492, May 24, 31 and, June 7, 1929, pp. 473-474, 497-498 and 521-523, 9 figs)
Electric lifts
Junior Instn. Engrs, -- Jl
Junior Institution of Engineers -- Journal ; 39 , n 8
1929
20 pages
9 Figs.
Article (Journal)
English
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