Motor Operated Dumb Waiters are designed for carrying lightweight freight and provided with a counterweight and capacity limited to about 250 kg. The Dumb Waiters are used for moving of small items such as books in libraries, to transfer goods and articles in a house, equipment in a hospital, mail or similar items in an office tower. The Dumb Waiters are driven by small electric motor and can be built with drum operated mechanism using a roped pulley. Motor Operated Dumb Waiters are not meant to carry passengers and move with a speed of 0.25 to 0.50 metre/ sec.
