The sequence switches consisted of a rotary contact shaft which was rotated to a route position and proved a circuit through contact wipers.
2.
The timer sequence switches the cam motor off, and the motor is started again by the signal from the thermostat when the required temperature is reached.
3.
The interlocking equipment was unique being a sequence switch interlocking system manufactured by Standard Telephone Company using telephone switching techniques to the technical specification of the signal engineer of the then Southern Area of the London and North Eastern Railway.
मोबाइल