Improvements in the Construction of Governors for Self-adjusting Slide-valve or Cut-off Valve Eccentrics.
Year: 1890

page_text: Date of Application, 9th Sept., 1890-Accepted, 25th Oct., 1890
COMPLETE SPECIFICATION.
Improvements in the Construction of Governors for Self-adjusting
Slide-valve or Cut-off Valve Eccentrics.
I, PETER JENSEN of 77 Chancery Lane, in the County of London, Fellow of the
Institute of Patent Agents, do hereby declare the nature of the said invention (a
communication to me from abroad by Christian Benedict Mohn, of Christiania,
Norway, Mechanical Engineer) and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement :-
The present invention relates to that class of slide valve gear or cut off-valve gear
in which the position of the eccentric relatively to the shalt is altered automatically
by means of weights rotating with the shaft and connected with the eccentric as
well as with springs in such a manner that the centrifugal force of the weights
counteracted by the springs will keep the eccentric in a position, that secures an
even speed of the engine at all different variations in the working of the engine.
The invention has for its object to improve the arrangement and construction of
this kind of governors and more especially to arrange the spring and its connection
with the weights in such a manner that a very delicate adjustment of the parts may
be easily obtained, thus in all instances making it possible to regulate the speed down
to an exact number of revolutions.
To illustrate the invention annexed drawing shows how the arrangement may be
done.
Fig. 1 shows the governor in axial longitudinal section,
Fig. 2 shows cross section on line - and Fig. 3 shows the same looking
from y
Fig. 4 shews a modified arrangement.
The eccentric A Figures 1, 2 and 3 is carried by an arm B that swings on a pin b
on the inner face of the pulley C. On the same pin and a similar one c at the
opposite side, two arch-shaped weights D are pivoted, one of them being by means
of the link a connected with the eccentric A. From the rear side of each of the
weights D projects a pin d and on the shaft behind the pulley is placed a flange-
or gland-shaped sleeve E, each of whose opposite sides or lugs e are connected with
one of the said pins d by means of a connecting link F, which is made in two pieces
hell adjustably together by means of a right and left-threaded nut. To the rear
side of the sleeve lugs is secured a helical spring G whose other end is held to the
shaft by means of a clamping device g.
A
It will be seen that when the nuts are turned one way or the other the links F
will be shortened or lengthened, whereby the relation between the spring on one side
and the centrifugal weights and eccentric on the other side will be altered enough
to produce a difference in the speed of the engine amounting to 2-5 per cent.
similar result would be attained by making the link in one piece, but connecting
one end of the same to a nut inserted in the sleevelugs and radially movable therein
by means of a small screw spindle.
Such a form is shown in Figure 4 where the link F is jointed to a nut F' which
fits in a slot in the lug of the sleeve E and is movable therein by means of the
screw E. But the first described arrangement has been found most satisfactory.
Having now particularly described the nature of the said invention and in what
manner the same is to be performed I declare that what I claim as the invention
communicated to me, is :-
1. A governor for automatically regulating the position of the eccentric relatively
to the shaft consisting of weights connected to a pulley which is fixed on the
rotating eccentric shaft and to which the eccentric is iointed. said weights being by

page_text: adjustable links jointed to a spring device which is connected to the shaft substantially
as set forth.
2. In a governor of the character described for automatically regulating the
position of the eccentric relatively to the shaft the spring dovice consisting of the
helical spring G passed around and at one end secured to the shaft while its other
end is secured to a sleeve E working loosely on the shaft and adjustably connected
to the rotating weights Dsubstantially as set forth.
3. The construction of automatic eccentric regulating governor described with
reference to Figs. 1, 2 and 3.
4. The construction of automatic eccentric regulating governor described with
special reference to Fig. 4.
Dated this 9th day of Sentami. 120A
JENSEN & SON,
77, Chancery Lane, London, W., Patent Agents.