If seasonal variation in activity, ventilation with open windows in the summer, or other local conditions make some speed variation from month to month desirable, ... Major changes may be taken care of by a change in pulleys, minor changes, say up to 15% speed change ... In the case of some materials such as long shavings or wool, special fan runners have been developed, so designed ... D *v/ Ar STEAI~7 COVE*Ar*T. Al*0^-7ApT COISJDEtVSAT/Or* 774 A? d Acor^tir r*-tC xagt;c/ cr. r/cz.
|Title||:||Fifty reports on mechanical power transmission from motor drive to industry|
|Author||:||Robert Warren Drake|