A few examples of electrically-operated mechanical appliances

In the first instance I am dealing with R. Waygood ∧ Co.'s electrically-operated passenger lift. The large diagram, which is reproduced, shows the electrical equipment and connections for a dual control lift—that is, a lift that can be operated either by a pilot in the car, or by throwing over a switch can be operated from the floors or from the car by push buttons. The motor is 12 h.p. D.C. shunt wound, and runs at either 755 or 410 revolutions per minute ; the driving is effected by a winding drum, this method being used on account of there being no slip, and so the positive automatic cut-off can be adjusted to stop the cage at the various floors without any difficulty.