A governor for telephone dials

This is a report on the development of a new type of governor for regulating the speed of rotary dials. The paper includes derivation of the equations of motion which determine the theoretical speed of the governor during dial run-down and an analysis of the operating characteristics of the governor as influenced by varying friction and input torque. Experimental verification of the relations is presented. A theoretical analysis which explains “governor chatter” or positional instability for friction-centrifugal governors is also given.