A GOVERXOK FOR TELEPHONE DIALS 1305 



where m = mass of weight 



I = distance from C.Cl. of the weight to the pivot (B) 

 8 = operating angle of governor weights with respect to a hori- 

 zontal phme 



For chattering to occur we know that the weight must lea^'e the go\'ernor 

 case. Theiefore, at some angle 13 the gra\'ity component will equal the 

 forces tending to move the weight outward. For this condition pressure 

 of the friction stud against the case will be equal to zero and 



F„d = 



fxFnC = 



and the moment ecjuation becomes for this e(iuilil)rium condition 



FJ) = F,h + ml sin 8 (1) 



Centrifugal ]Moment = Spring Moment + Gravity Moment 



By applying the steady-state speed eciuation and the equation for cen- 

 trifugal force we can transpose equation (1) to contain only design con- 

 stants of the governor. From the steady-state speed equation 



G{d - nc) + Mmcoo- 



Mil 



Substituting Fs = nioio' Tq and M = 'Itnrrob 



2 G ., >, , mrrobfiFs 



mrrobnu = — {d — nc) -{- 



or 



2 mro 



2 G (d - iic) 



Fs = mno} — 



2 rhu 

 also, the centrifugal force is 



Fm = mwra 



Substituting in equation (1) the values for {Fs) and (F«) 



2 7 2, G{d — ixc) . T • a 



mwroh = mruu h — + m/ sm 



Irn 



