Centrifugal speed governor,especially for prime movers

Claim 1

A centrifugal speed governor with resilient return mechanism so that with change of load there is previous centrifugal speed again attained after a short time without any diversion arising as a result of changed load condition, especially for internal combustion machine prime movers having predetermined speed maintained independent of loading condition at a time, which includes: a governor housing, control shaft means for driving connection with a machine to be controlled, fly-weight means contained in said governor housing and keyed to said control shaft means for rotation therewith and adapted in response to an increasing speed of said control shaft means to move in one direction, spring loaded actuating means operatively connected to said fly-weight means for urging said fly-weight means to move in a direction opposite to said one direction, linkage means pivotally connected to said actuating means for controlling the fuel supply to the machine to be controlled, lever means pivotally connected to said actuating means, adjustable auxiliary spring means effective length of which is adjustable independently of said governor housing and operatively connected to said lever means for adjusting the same, holding means operatively connected to said lever means to oppose movement of said lever means and including a damping member made at least partly of magnetizable material, said damping member being interposed between said governor housing and said lever means as well as including means for variably creating a magnetic field for said last mentioned member to adjust magnitude of load fluctuations with which the governor reacts to be selectively quick and slow in responding to small load changes of longer duration, said last mentioned member being axially movable within said magnetic field of adjustable variable intensity.