Improvements in Automatic Governor Cut-offs for Steam Engines.
Year: 1898

page_text: Reprinted as amended in accordance with the decision of the Chief Examiner,
dated the 23rd day of November 1899.
COME MEIN DIVIFICATION (AMENDED).
Improvements in Automatic Governor Cut-offs for Steam Engines.
I, MARTIN OLSON ARNEGAARD, Student and Engineer, residing at Mayville, P.O.,
in the County of Traill, and State of North Dakota, United States of America, do
hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
:-
My invention has relation to automatic governor cut-offs for steam engines, and
the object is to provide a simple, effective and reliable cut-off for steam engines
generally, and it is to this end the novelty consists in the construction, combination
and arrangement of the same as will be hereinafter more fully described and
particularly pointed out in the claims.
In the accompanying drawings the same reference characters indicate the same
parts of the invention.
Figure 1 is a side elevation of my improved automatic cut-off governor,
Figure 2 is an end view of the same,
Figure 3 is a vertical section,
Figure 4 is a similar view taken at a right angle to that shown in Fig. 3.
Figure 5 is a side elevation showing the governor in operative position.
Figure 6 is a perspective view of parts of the governor detached from each other.
Figure 7 is a horizontal section on a line above the rock shaft 23.
1 represents the standard in which is journaled the horizontal shaft 2, provided at
its outer end with a pulley 3, and at its inner end with a bevel-gear wheel 4, which
meshes with a similar bevel-gear wheel 5 fixed on the lower end of a vertical sleeve 6
journaled in the standard and terminating in vertical parallel arms 7-7.
8-8 represent approximately right angular levers fulcrumed on the bolts 9--9 in
the upper ends of the arms 7-7, and their outer depending ends are provided with
the usual governor balls 10-10.
The inner ends of the levers 8-8 are pivoted to the upper ends of the connecting
rods 11-11, the lower ends of which are pivoted to the horizontal cross-head 12,
which is loosely journaled between the collars 13-13, on the upper end of the
vertical cylindrical shaft 14 journaled in the sleeve 6.
The lower portion 15 of the shaft 14 is flat or rectangular in cross-section and it
terminates in the parallel ears 15'-151 between which is pivoted the tongue 16 of
the connecting-rod cam bar 17 by the bolt 18.
a represents a guide-roller fixed on the standard 1, and a² represents a similar
guide-roller mounted on a stud b adjustably secured by means of a nut in a slot c in
the standard, and these rollers engage the opposite edges of the rectangular portion 15
of the vertical shaft to ensure an easy vertical movement of the same.

page_text: A belt stud 19' extends through the contiguous free end 20 of a crank 22 21 having
an eye 22 by which it is fixed on the rock-shaft 23 journaled in the lower end of the
standard 1.
24 represents a lateral arm yoke bar pivoted on the bolt stud 191, which carries the
flanged guide-rollers 25-25. 26 represents a spiral spring fixed at one end to the
crank 221, and at its other end to a threaded rod extending through a guide-
bracket 27, and having a thumb-screw 28 encompassing its outer end to counter-
balance the link and its operating mechanism.
29 represents a rod pivoted at one end to the bolt stud 19 and at its other end to
a hand-lever 30 fulcrumed in a frame 31 provided with a notched semicircular
rack 32, which engages the pawl 33 on said hand-lever and secures it in the position
to which it may be adjusted.
34 represents a horizontal crank arm fixed on the outer end of the rock-shaft 23,
and its outer end is provided with a connecting rod 35, pivoted to a yoke 36 fixed
about midway on the link 37, so that the centrifugal action of the governor balls will
be communicated through the medium of the vertical shaft 14, cam bar 17 yoke 24
crank 2221, and rock-shaft 23 to the link, 97 and as the link controls the ordinary
slide-valve, (not shown) through the medium of the valve-stem, the motion being
imparted to said link by the usual eccentrics and their rods as shown, it follows that
a perfect variable cut-off is produced by the action of the governor on the valve,
through the link.
38 represents an integral horizontal arm on the standard 1, in the outer end of
which is fulcrumed a lever 39, the horizontal arm 40 of which projects under a lateral
pin 41 fixed in the shaft 14. The lower end of a spiral spring 42 is connected to said
arm 40, and its upper end to an adjusting screw 43 mounted in a bracket 44, and
which acts as a partial counterbalance for the shaft 14 and cam bar 17.
45-46 represent the oppositely disposed arms of said lever 39, and 47-48
represent hand rods or cords connected to the outer ends of said arms, and by means
of which the governor may be manipulated to increase or diminish the speed of the
engine as occasion requires.
When the lever 30 has been shifted to the position shown in Fig. 5, the link 37
is-raised-by-the-red-35--connected to arm-34-fust on the rockshaft 23, carrying the
crank-21-couneeted-through-bolt-10' to the link 17-which is pivoted-to-the-end 20.
In this condition-the governor-shaft may be raised or lowered by the nation-of-the
governor bulls sufficiently to change the position of the link 37-und then control-the
nction of the slide valve. The link 17-being connected to the governor-shaft-at--one
end-and to-the-lever-rod-28-at-the-other end, its inclination-may-be set by the-lever
end and thereafter-varied by the uction of the governor,-the-construction--being-as
described-above:
When the hand lever 30 and link 37 are in mid-position (as shown in Fig. 1) the
cam bur 17 is also in its mid or inactive position. When the lever 30 is shifted to
the position shown in Figure 5, the cam bar 17 is moved into the inclined position
shown, and in eo moving acts through one of the rollers 25 and yoke 24, upon the
crank 21 which rotating the shaft 23, causes a corresponding movement of the lever arm 34
and link 37. It will be apparent that as the shaft 14 rises or falls by centrifugal action
of the governor arms 8, the cam bar 17 will also move vertically and shift the crank 21
laterally, thereby adjusting the link 37 correspondingly. Thus a very sensitive and
efficient, automatic, cut off reversing valve gear is produced.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
7. An automatic variable governor cut-off for steam engines, comprising the
standard 1, the sleeve 16, vertically journaled therein, the governor levers 8-8,
fulcrumed in the upper end thereof, the vertical shaft 14, journaled in said sleeve
and in operative connection with said levers, the eonnecting-red cam bar 17 pivoted
to the lower end of said shaft 14, in combination with the lateral arm bar 24, the

page_text: flanged guide-rollers 25-25 journaled on said arm bar, and the rock-shaft 23, the
crank 221, fixed thereon and carrying said arm bur, and means substantially as
described for imparting a governing motion from said shaft to the link 37, as and for
the purpose set forth.
2. An automatic variable governor cut-off for steam engines, comprising the
standard 1, the sleeve 6, journaled therein, and means substantially as described for
imparting motion to said sleeve, the governor levers 8-8, carried by said sleeve, the
shaft 14 journaled in said sleeve, and in operative connection with said levers, in
combination with the shaft 23, its crank 2221, the arm bar 24, fixed pivoted
thereon, the rollers 25-25 mounted thereon, the connecting rod cam bar 17, pivoted
to the lower end of the shaft 14, the arm crank 34 fixed on said shaft 23, and in
operative connection with the valve-gear, substantially as and for the purpose set
forth.
3. An automatic variable cut-off governor for steam-engines, comprising the
standard 1, the vertical sleeve 6 journaled therein and terminating at its upper end
in the vertical parallel arms 7-7, the governor levers 8-8, fulcrumed in the upper
ends of said arms, the vertical cylindrical shaft 14 journaled in said sleeve 6, the
horizontal cross-head 12, pivoted on the upper end of said shaft, and the rods 11-11,
connecting the outer ends of said cross-head to the inner ends of the levers 8-8, in
combination with the rod cam bar 17 pivoted at its upper end to the lower end of
the shaft 14, the rock-shaft 23 provided with the crank 2221, the bolt-10-connecting
enid-rod-17-and rod 29, and the horizontal-arm crank 34 fixed on said rock-shaft and
in operative connection with the link 37, and means substantially as described for
imparting motion to said link independently of the movement communicated to it
by the governor-levers 8-8, as and for the purpose set forth.
Dated this 4th day of December 1897.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.