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Патент USA US2116849

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May 10, 1938.
2,116,849
M. w. ROSNER
PROPELLER GOVERNOR
Filed Aug. 25, 1957
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Patented ‘May 10, 1938
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UNITED STATES PATENT ‘arm-E
2,116,849
PROPELLER GOVERNOR
Michael William Rosner, St. Paul, Minn.
Application August 25, 1937, Serial No. 160,866
8 Claims. (Cl. 115-05)
This invention relates to means for reducing
the action of a boat propeller, and has special
reference to one readily applicable to the pro
peller of what is known as an outboard motor
5 for the propulsion of small boats, so that the
same may be slowed down in speed for trolling
or the like without materially affecting the speed
of the motor.
It is well known that devices for this purpose
have been resorted to but have been more or less
complicated, liable to fouling with weeds, grass,
or the like with which they may come in contact,
and not convenient of application, and to over
come these objections in a general way is the
15 principal object of the instant invention.
Simplicity of parts and adjustment are further
advantages of the invention.
Other objects and advantages will appear in
the following description of the invention.
20
Referring now to the accompanying drawing,
forming part of this application, and wherein like
reference characters indicate like parts:
Figure 1 is a perspective view of the forward
face of one practical embodiment of the inven
25 tion for application to a two-blade propeller.
Figure 2 is a similar View of a modi?ed form
as applied to a three-blade propeller.
The device here illustrated comprises a body
portion'of sheet metal and disc-like in form as
.20 indicated at I, it being a predetermined size in
diameter and less than that of the propeller to
which it is to be applied as obviously the relation
of these two diameters will determine the effect
of the invention upon the action of the pro
35 peller. In this respect simplicity of application is
very important as it may be desired during a
single ?shing expedition to have the trolling boat
operate ‘at different speeds, and when a quick
change of the device may be quite desirable.
At the axis of this disc there may be provided
any sized opening to suit the protruding end of
the propeller shaft and nut therefor as common,
and to surround same there is provided upon the
device here shown a band-like ?ange 2, this ?ange
45 being rigidly ?xed as by welding or the like to
the disc.
Upon opposite sides of the center of the disc
and spaced inwardly somewhat from the mar
ginal edges thereof are punched inwardly there
50
from the rectangularly shaped clips 3, they being
formed at an angle or suitable curvature to nor
mally approximately fit over the following edge
of a propeller blade, while opposite each one of
these clips and facing same, is a U-shaped spring
55 snap or catch 4, it being attached to the inner
or forward face of the disc, in this instance as
by bolts indicated at 5. The holes for these bolts
may be slotted as is common for such connections
whether in the disc or in the clip for longitudinal
adjustment, and the free or protruding end of the 5
clips are provided with forwardly projecting ?nger
like portions 6 for overlapping engagement with
the leading edge of the propeller blade to which
the device is being attached.
With such a device it is only necessary to place
same with the clips 3 approaching overlapping
engagement with the following edges of the
blades, when a slight backward rotary motion to
gether with an axial thrust will snap the device
onto the propeller blade, where it will be securely 15
and non-removably attached, except by the re
leasing of the spring snaps 6 from their engage
ment over the edges of the blades.
In Figure 2 there is illustrated one of the gov
ernors as equipped for and applied to a three
blade propeller of slightly different construction, 20
though the governor functions in exactly the same
manner as that previously described, and is ap
plied to the propeller in the same manner, and
that in such a propeller the hub portion may pro
ject entirely through a somewhat larger axial 25
hole in the disc instead of the ?ange-like member
2, previously described.
Having thus described my invention, what I
claim and desire to secure by Letters Patent, is:
1. The combination with a screw propeller of
a removable governor therefor comprising a disc
of less diameter than said propeller and having
spring members carried thereby for holding en
gagement over the edges of said propeller.
35
2. A governor for screw propellers comprising
in combination a disc having spring means for
removable attachment to the edges of the blade
of said propeller.
3. A governor for screw propellers comprising
in combination a disc having clips therein for
engagement with one edge of each blade of said
propeller and spring catches for engagement with
the other edge of each blade, for removably hold
ing said disc to said propeller.
45
4. A governor for screw propellers comprising in
combination a sheet metal disc having clips
pressed inwardly therefrom for overlapping en
gagement with one edge of the blades of a pro
peller and spring clips for similar engagement
over the opposite edge of said blades.
5. A governor for screw propellers comprising
in combination a disc, spring means carried upon
the front face of said disc for convenient snap
0
55
2,116,849
2
ping engagement with the blades of said pro
peller.
6. A governor for screw propellers comprising
in combination a disc and means carried upon
the front face of said disc for overlapping en
gagement with the edges of the blades of said
propeller.
'7. Speed control means for a boat driven by
a screw propeller, comprising a sheet metal disc
10 carrying spring means for removable holding en
gagement with the edges of the blades of said
propeller.
8. A governor for screw propellers comprising
in combination a disc having clips pressed out
wardly therefrom for engagement with one edge
of each blade of said propeller, and spring catches
adjustably secured to said disc for engagement
with the other edge of each blade for removably
holding said disc to said propeller.
MICHAEL WILLIAM ROSNER.
10
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