GOVERNORS 333 
285. Loaded Governors.—The simple governor is improved, par- 
ticularly as regards its power ‘of overcoming frictional resistances, by 
Fi4@. 521. 
adding a central weight, which increases 
the downward pull on the revolving 
balls without increasing their centri- 
fugal force. Fig. 521 shows a simple 
form of loaded governor. The central 
weight or load W is in the form of 
a dise with a central boss, which 
corresponds to the sleeve E in the 
illustrations of the preceding Article. 
The masses at the lower ends of the 
revolving arms, or pendulum weights, 
are in this case in the form of rollers, 
upon which the dise part of the central 
load rests, there being slots in the disc 
through which the revolving arms pass, 
as shown. 
Let W equal the total weight of 
the central load, and w the weight of 
each of the pendulum weights. The 
centrifugal force F of each pendulum 
2». 
weight is equal to = ”, and the down- 
ward pull on each of these weights is 
SS 
LIU Mc Ldddaaadddddaddadddaa 
SIUMMSS A 
inuunthy, 
z L | 
| 
KI Yi pled Ld SV 
an a 
SSN 
L 
—-+w, hence, taking moments about 
2 
the point of suspension of the arms, Fig. 522. 
2 
(F + w)r= Fh= sath Lal and therefore h= (= ate 
. g 2w /w* 
Comparing this with the corresponding result for the simple governor, it 
is seen that for the same speed the height of this loaded governor is 
greater than that of the simple governor in the ratio of W + 2w : 2w. 
