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Патент USA US2116025

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May 3, 1938-
T. v. HEMMINGSEN
_ _
2,116,025 ‘
ENGINE SPEED GOVERNOR
Filed Oct. 51, 1936
2 Sheets-Sheet l
J W WémM/E ‘Sen
May 3, 1938.
T. v. HEMMINGSEN
2,116,025
ENGINE} SPEED GOVERNOR
Filed Qct. 31, 1956
‘
2 Sheets-Sheet 2
M33255?
Patented May ‘3, 1938
‘ 2,116,025
UNITED STATES
PATENT orrics
2,116,025
' "ENGINE SPEED GOVERNOR
lull
=
W
..
s'l‘orkildvaldemar
Hemmingsen, Copenhagen,
Denmark
‘' appears“ October 31, 1936, Serial No. 108,676
"
'
1
“
i
Y
"
‘In Denmark January 2, 1936
‘
‘
7
teams.
‘My invention relates ‘to an engine speed gov
ernor of thekind comprising a reciprocating
governor member, having movably connected to
H
it-t‘wo masses or inertia elementswhich coact
‘5 with a displaceable passive'l‘ever‘ or a like mem
ber Which‘is connected‘ with a‘device for regu
lating the "motive fuel supply to the engine, in
such a‘manner that the passive‘ lever at differ
‘
ent speeds is displaced in the one or the ‘other
‘10 direction by‘ the one or the other of the inertia
elements.
‘
i
‘
‘
15 tion'will be explained in a more‘detailed man:
ner in connection with the description of‘ the
“
1'
‘
‘
‘ The object of the invention is to provide im~
20.
provements in‘ connection‘ with governors of the
above mentioned kindfthe fact being that the
known governors of the kind in question have the
de?ciency that‘ the inertia elements ‘tend to ham
m'er when coacting with the passive lever ‘with
the result that the hammering action gives rise
‘25 todamage. Various means to prevent‘ this have
been proposed, e. ,g. to apply a braking device to
the passive lever, so vthat this lever‘whi'ch carries
projections or dogs coacting with projections‘ of
the inertia elements'of the governor member
30 willremain in the position, to which it has been
moved by‘ the governor member. ‘ However, the
governing mechanism as a whole has a certain
degree of elasticity “which causes the passive lever
to ?ick back a trifle, suf?cient to make the'pro
35 jections hammer upon each other, if the inertia
element, which has displaced the passive lever re
a mains in’ its swung-out position. ‘
‘
The invention has for its object to overcome
thesaid de?ciency, and is chie?y characterized
49' by‘ a mechanism or means which moves the pas~
sive lever or the likemember, after it has been
displaced by one of the inertia elements of the
governor member, to a "still furtherrposition in
the direction‘ of the said displacement and main
45 tains the passive lever in such further position,
so that‘the inertia elements when remaining in
swung-out position will not be able to hit the
passive lever, and hammering consequently is
avoided.
50
‘
‘
.
l
‘
(01. 264-1)‘
which the mid-part is concentric with the axis,
about which the lever is rotatable, but of which
the end, parts are curved to a stronger degree
than the mid-part, the mechanism further com.
prising a spring-pressed roller adapted to the
engine frame and bearing against the middle of
the cam, when the passive lever is in its neutral
position.
Hereby is obtained that the pressure
of‘ the spring pressed roller on the lever at the
end of the movements imparted to it by the gov- 10
ernor member has a component acting to impart
,
The construction of such governors may be per
formed in different ways. One kind of ‘construc
tion is illustrated on the drawings and its func
drawings.
‘
.
According to a further feature of the invention
the additional movement, of the passive lever be
yond the position to which‘ it‘ is-movedby the gov
ernor member is suitably effected by means of a
cam device. For‘instahce thepassive lever may
55 comprise a cam shaped or curved portion of
a further motion in the same direction to the
passive lever, and to lock and maintain it in
such extreme position.
‘This construction may also be modi?ed in the 15
manner that the passive lever carries the spring
pressed roller, whilst the co-acting cam is sta
tionary.
‘
‘
Suitable stops, stop. screws or the like may be
arranged to limit the displacement of the passive g0
lever.
.
'
The invention is illustrated in the accompany
ing drawings.
‘
Fig. 1 is an elevation of a constructional form
of such parts of a governor according to the in- 9,ul
‘vention, as are necessary to enable the invention
> to be understood.
-
Fig. 2 is a partial sectional plan view of the
same.
'
Fig. 3‘shows another constructional form in a 30
like manner as Fig. 1.
Fig. 4 is a partial sectional plan view of the
‘same.
Fig. 5 is a third constructional form in the like
manner as Figs. 1 and 3.
~
Fig. 6 is the same shown in a like manner as
Figs. 2 and 4.
Fig. 7 on a greater scale the inertia elements
in one relative position and the passive lever,
which is shown in dotted lines in its lower ex- 40
treme position.
i
' 'Fig. 8 is the same with the inertia elements in
another relative position and with the passive
lever in the same extreme position, but going to
be moved upwardly, and
45
Fig. 9 is the same with the passive lever in
its upper extreme position and with the inertia
elements in a third relative position.
Similar parts in each ?gure are given the same
reference numerals.
50
Referring'now to Figs. 1 and 2, 2 is a pivot
pin on the end of a shaft mounted in a ?xed bear
ing 3 and on the pin 2 the passive lever 20 is
mounted, At its free end (to the right in the
drawing) the passive lever 20 carries projections 55
2
2,116,025
or dogs 25 and 25 coacting with corresponding
From Fig. 7 it appears that a space is provided
projections or dogs on the inertia elements of a between the projections l2 and 25, so that ham
governor member not shown in Figs. 1 and 2, but . mering is avoided, and the same applies to Fig.
indicated by H in Figs. '7, 8 and 9, which show
Cl also the inertia elements 9 and i5 mounted on
pivots it! and H5 respectively on the governor
member H and provided with projections l2
and I7 respectively to engage the projections 25
and 26 respectively of the passive lever 20. The
10 inertia members 9 and i5 a‘re in?uenced by bi
asing springs 52 with spring guides 53 and 54
as schematically shown, the guides 53 being mov~
able while the guides 5d are stationary but piv
otably mounted. The tension of the springs may
15 be adjustable by means of adjusting screws (not
shown).
In order to facilitate the understanding it is
assumed as example that the tensions of the
springs 52 are so adjusted that the inertia ele
ment I5 will swing out, when the number of revo
lutions per minute exceeds say 115, while the in
ertia element 9 will swing out, when the number
of revolutions per minute falls below 120, (i. e.
the inertia element 9 returns to its passive posi
25 tion when the number of revolutions exceeds
120). The normal number of revolutions is as
sumed to be 110.
Now Fig. 7 corresponds to normal running of
the engine (or lower speeds), the inertia member
30 |5 being in retracted position, while the inertia
member 9 is swung out and consequently will se
cure that the passive lever 20 remains in its lower
extreme position, as any other position of the
lever will involve that the projection i2 engages
the projection 25 so as to carry the lever 20 down
to the said position, when the governor member
|| descends. If, however, the number of revolu~
tions increases to 115 the inertia member l5 will
swing out as shown in Fig. 8 so that the projec
40 tion l1 will engage the projection 25 on the pas
sive lever 23 and move the latter upwardly, there
by involving that the fuel supply is cut off.
rovided that the number of revolutions is only
slightly above 115 the passive lever will again be
moved down with the governor member I! owing
to the inertia element 3 being still swung out so
as to engage the projection 25. Consequently the
fuel pumps are inactive only for a very short
period. This adjustment is. preferred in case of
short periods of increased speed, and the gov
ernor will soon again adjust the fuel pumps to
normal running, the passive lever 20 being moved
up and down a few times until the inertia ele
ment Hi again returns to its passive position. If,
ill however, the speed increases so much that it
reaches or exceeds 120 the inertia element 9 will
be retracted, so that the passive lever 20 remains
in its upper position (which is the case shown in
Fig. 9), whereby the fuel pumps are made in
(30 active until the speed descends again below 120.
The inertia element 9 then swings out again and
engages with its projection i2 the projection 25
of the passive lever 26 which is therebyreturned
to its lower position. If the number of revolu
tions has not fallen below 115 the lever 20 is
moved up and down several times, the inertia
element l5 being not retracted until the number
of revolutions falls below 115.
As it will be seen the inertia element 9 is in
its swung out position during normal running, so
that it might hammer with its projection |2 upon
the projection 25 of the passive lever 20, if no
care was taken to secure that the passive lever
was moved a distance beyond the position to
75 which it is moved by the inertia element itself.
9 as regards the projections l1 and 26.
At its end opposite to the projections 25 and
28 the lever 20 has an extension 21 (Figs. 1 and
2) connected by a joint 28, 29 to the movable
guide 30 of a coil spring 3|, the other guide 32
of which is pivotally connected to a stationary
bracket 33. The lever 20 or its extension 21 also 10
carries a pivot or the like (not shown) for trans
ferring the governing motion, e. g. to a fuel pump
to adjust the supply of fuel. To limit the motion
of the lever 20 a pin 50 is provided on the said
lever to coact with set screws 5| adjustable in 16
the bearing 3.
. The abovedescribed device acts as follows:
When one or'the other of the projections l2
and I’! on the inertia members of the governor
member II has moved the lever 20 to one side 20
of the other (i. e. to the displaced positions in
dicated by dotted lines A and B in Fig. l), the
pressure of the spring 3| moves the lever 23 some
what beyond the position to which it has been
moved by the coaction of the projection |2 with 25
25 or of I‘! with 26, so that the projections in
question are moved apart from each other as in-1
dicated in Figs. 7 and 9, and thus the said pro
jections are prevented from hammering upon
each other during the subsequent movements of 30
the inertia members.
In the constructional form shown in Figs. 3
and 4 the same reference numerals are used as
in Figs. 1 and 2, but here the extension 21 car
ries a cam-shaped element 34 coacting with a
roller 35 mounted in a slide block 36 acted on
by a spring 3|. The block 36 is slidably mounted
in a stationary guide 31, and the other end of
the spring acts on a stationary guide 38 adjust
able by means of an adjustable screw 39 screwed 40
into a plate 40 connected to the guide 31 by bolts
4|. The central part of the cam 34 forms a
circular are having its centre in the axis of the
pivot pin 2, while the outer portions of the cam
34 form curves lying inside the said circular arc,
e. g. along its chords. The extension 27 also car
ries a pin 22 for transferring the governing mo
tion to a fuel pump or similar. adjusting device.
When the lever 20 is displaced so that the roller
35 no longer acts on the circular portion of the 50
cam 34, the roller exerts, by means of the spring
3 I, a pressure on the lever 20 having a component
which acts to impart to the said lever an addi
tional motion in the same direction as the di
rection in which it has been moved, so that the
lever 20 is moved beyond the position to which
it was moved by the governor member. H.
In the constructional form according to Figs.
5 and 6 the lever 20 carries the roller 35 in?u
enced by the spring 3|, the roller 35 being 60
mounted on a pivot 42 carried by a chain link
43 with which the spring 3| coacts. The roller
35 is thus pressed against the stationary cam 34
which in this case forms part of the bearing 3.
The cam 34 has a shape similar to the cam 34
according to Figs. 3 and 4, and the device acts
in a similar way, the lever 20 being caused by the
roller 35 acting on the outer portion of the cam
34 to receive an additional motion at the end
of its displacement.
70
As in Figs. 1 and 2, the lever 20 in Figs. 3 and
4 is ?tted with a pin 50 and the bracket 3 with
set-screws 5|, while in Figs. 5 and 6 a somewhat
modi?ed arrangement of pin 50 on lever 20 and
set-screws 5| on the bracket 3 is shown for ad 76
3
2,116,025
justably limiting the displacement of the lever 20.
I claim:
1. In an engine speed governor of the kind de
scribed, a reciprocating governor member, two»
spring-biased inertia elements movably connected
to said governor member, a displaceable passive
lever adapted to coact with said inertia elements,
said lever being displaced in one direction by one
of the inertia elements and in the other direction
10 by the other of the inertia elements when the
speed exceeds or falls below certain values, said
lever being connected with a device for regulat
ing the motive fuel supply to the engine, a mech
anism'adapted to move the passive lever after it
15 has been displaced by one of the inertia mem
bers of the governor member to a still further
position in the direction of the displacement and
to maintain the passive lever in such further
position.
20
2. An engine speed governor according to claim
1 in which the mechanism for effecting the ad
ditional movement of the passive lever beyond the
position to which it is moved by the inertia ele
ment of the governor member comprises a cam
device.
7
3. An engine speed governor according to claim
1 in which the passive lever comprises an arcuate
cam, the mid-portion of which is concentric with
the axis of rotation of the lever, the end parts
of which are curved to a greater degree than the
mid-part, the mechanism further comprising a
spring-pressedroller adapted to the engine frame 10
and bearing against the middle of the cam, when
the passive lever is in its neutral position.
4. An engine speed governor according to claim
1 in which the passive lever is provided with a
spring influenced roller, a stationary cam coact 15
ing with said roller, said cam having a mid-part
concentric with the axis of rotation of the lever
and end parts curved to a greater degree than
the mid-part, the spring-pressed roller bearing
against the middle of the cam, when the passive 20
lever is in its neutral position.
TORKILD VALDEMAR HEMMINGSEN.
‘
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