MENTS IN CENTRIFUGAL GOVERNORS
Year: 1886

page_text: Date of Application, 1st Apr., 1886.
Complete Left, 30th Dec., 1886.
Complete Accepted, 1st Feb., 1887.
1 HERMANN KÜHNE of 34 Great St. Helens in the City of London in the County
of Middlesex, Engineer do hereby declare the nature of my Invention for IMPROVE
MENTS IN CENTRIFUGAL GOVERNORS to be as follows:
In order to construct a Pseudo-Astatic Governor which at certain equal variations
of speed will give out very approximately the same amount of energy in any high or
low position I apply inverted Conical Pendulums in combination with hanging straps.
the said hanging straps having a shape of Belleranks the inner end of which belleranks
press upon one or more springs. Referring to the annexed illustration A Aare the
inverted Conical Pendulums, B B the hanging straps, the spring, N the nut of the
Governor. The Conical Pendulums are fitted at their lower parts to the nut N by
means of eyes and bolts or in any other suitable manner and at their shafts preferably
to a point outside of the centre line of the said shafts in a similar manner to the
hanging straps. The said Pendulums are thus guided in their up and down move-
ments in such a manner that the centres of the balls P P at any position of the
governor nut N move in one and the same plane horizontally to the axis of the
governor spindle, or very nearly so. By counteracting the centrifugal force of the
said governor balls by means of one or more springs of suitable tension it will be
attained that the governor acts in a pseudo astatic manner.
HERMANN KÜHNE.

page_text: COMPLETE SPECIFICATION.
Improvements in Centrifugal Governors.
I HERMANN KÜHNE of 25-35 New Broad Street (late of 34, Great St. Helens)
in the City of London in the County of Middlesex Engineer, do hereby declare the
nature of my said invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:-
In order to construct a Pseudo-Astatic Centrifugal Governor which at certain equal
variations of speed will give out very approximately the same amount of energy in a
high or low position I apply inverted Conical Pendulums which are at a point between
the bottom fulcrums and the centre of the balls suspended by hanging straps the said
hanging straps each forming one arm of a bellerank the inner end of which bellcrank
press upon one or more springs. Referring to the illustrations filed with the
Provisional Specification No. 4581 A A' are the inverted Conical Pendulums, B B¹
the Hanging straps C the spring N the nut or sleeve of the governor. Two Conical
Pendulums are usually applied but more than two may be combined in the same
governor and the said Pendulums are fitted at their lower parts to the moveable
sleeve N by means of eyes and bolts or in any other suitable manner and at their
shafts preferably to a point outside of the centre line of the said shafts in a similar
manner to the hanging straps. The said hanging straps will then guide the said
Conical pendulums in a predetermined path preferably in such a manner that the
centres of the governor balls P P at any position of the Governor nut or sleeve
move in one and the same plane horizontally to the axis of the governor spindle or
very nearly so. The centrifugal force of the governor balls will thus increase at an
approximately equal ratio to the opening of the said governor balls and to the increasing
tension of the spring, whereby a Pseudo-Astatic action of the governor will be
attained.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is :-.
In a Centrifugal Governor the combination of inverted Conical Pendulums with
Bellcranks and a Spring or Springs in such a manner that the balls of the said inverted
Conical Pendulums are by their Hanging Straps guided approximately in a plane
horizontally to the axis of the Governor Spindle and the said Hanging Straps form
each one arm of a Bell Crank the other arm of which Bell Cranks act upon one or
more Springs substantially as drawn and described.
HERMANN KUHNE.