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Патент USA US3099329

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July 30,
c_ D_ TOWN
Filed July 5, 1961
C'lz'nfon D. Town
Clinton D. Town, 5W5 SE. Rush St, Portland, Greg.
Filed Early 5, 1961, Ser. No. 124,2§4
3 Claims. ((Ci. Till-151)
the mechanism, their mounting, and the means for feath
ering them;
FIG. 2 is a side view of the propulsion mechanism il
lustrated in PEG. 1; and
FIG. 3 is a top, plan view of a modi?ed form of the
invention, with portions removed.
Referring now to the drawings, and in particular to
*iGS. 1 and 2, a propulsion mechanism is indicated gen‘
boats, and more particularly to a propulsion mechanism
erally at ill. The mechanism is supported on horizontal
with paddles having means for feathering the paddles as 10 beams 12 and 14, that are part of and extend longitudi
they are moved.
nally ‘along a boat hull. The space between the beams
Paddle-type propulsion mechanisms have a number of
is open, and mechanism it} is carried by the beams with
peculiar advantages. For instance, they may be con
‘bottom portions thereof submerged in the water that
structed with ‘a relatively shallow draft, and still operate
?oats the hull.
e?iciently. Further, they are not as susceptible to en 15
In the embodiment of the invention illustrated in H68.
cumbrance with weeds and grasses ‘as propeller-type
1 and 2, propulsion mechanism 16 comprises an elon
This invention relates to propulsion mechanism for
mechanisms. To increase the efliciency of paddle-type
gated dead axle or shaft 2%, extending transversely of
propulsion mechanisms, some constructions have included
means for feathering the paddles, on their movement in
the beams by brackets 22.
beams 12 and 14. Thus, the shaft has its ends ?xed to
and out of the water, whereby they remain substantially 20 Iournaled on shaft 2%, between the brackets 22, is an
upright at all times. This reduces slapping of the water
elongated sleeve 26. The mounting for the sleeve on
and other effects that result in loss of power. A paddle
the shaft is such that the sleeve is prevented from shifting
type propulsion mechanism, with means for feathering
axially on the shaft. Adjacent each end of sleeve 26,
the paddles, is disclosed in U.S. 2,918,892, entitled “Boat
and secured thereto, as by screws 28, is a circular mount
and Propeller Mechanism.” Generally, this invention 25 ing disc or plate, such being indicated at 36, 32.
concerns improvements in mechanisms of the type dis
Plates 3%, 32 support a series of paddles 34, which are
closed in the above referred-to patent.
A general object of the invention is to provide an im~
between the plates and equally circumferentially spaced
about sleeve 26 and axle 29.
Each paddle comprises a
proved paddle-type propulsion mechanism, where the
blade portion 35, and is ?xedly secured by clamps 38 to
paddles, as well as the means for feathering them, are 30 a spindle 4th. The spindles have opposite ends journaled
carried entirely on‘ ‘a straight axle or shaft, such shaft
in mounting plates 3%)‘, 32.. One set of ends of the spin
extending transversely of the boat and being suitably
dles have radially offset portions, indicated at Ma.
mounted at its ends.
As a result of the construction,
The propulsion mechanism is actuated by means ‘of a
skewing tendencies in the paddles are substantially elimi
pulley 42 secured to an end of sleeve 25, and a driven
nated. Mass and interbracing of the parts in the propul 35 belt 44. Belt 44 is rotated by suitable power-operated
sion mechanism may be considerably reduced.
means (not shown). The fact that the paddles have
More speci?cally, it is an object of the invention to
their ends mounted on plates, each of ‘which is secured
provide a propulsion mechanism with paddles, where a
to a driven sleeve, is important, as it means that the
straight shaft supports the paddles and the means for
paddles are pulled through the water evenly and without
feathering them, and power is supplied to the paddles 40 skewing or twisting tendencies.
by discs supporting the ends of the paddles, each disc
Offset portions Alia of the paddle spindles are axially
being power driven and mounted on the shaft with their
outwardly of plate 32. A regulator disc or plate is indi
centers aligned. In this way power is applied evenly to
cated at 416, and the ‘offset portions ‘of the paddle spindles
both sets of ends of the paddles without subjecting the
are journaled in plate lid at points equally circumferen
ll5 tially spaced about the perimeter of plate 46‘.
paddles to twisting strains.
Yet another object is to provide a paddle-type pro
Fastened to shaft ‘20, as by welding, and outwardly in
pulsion mechanism, including feathering mechanism, that
‘an axial direction from plate 32, is an eccentric 50, also
features a regulator disc journaled on an eccentric mount
ed in a stationary position on one end of the shaft that
referred to herein as ‘an eccentric bearing member.
eccentric comprises a disc bounded by a circular bearing
surface, the center axis of which is offset radially from
supports the propulsion mechanism.
Still another object of the invention is to provide novel
the longitudinal axis of the axle (to the right of the longi
cover structure for the paddle feathering mechanism.
In the description of the invention that follows, two
tudinal axis of the axle in the ?gures).
Regulator disc 46 has a circular bore 52 (see FIG. 2)
embodiments are disclosed.
A feature of one embodi
ment is the provision of a dead axle or shaft supporting
a paddle mounting, and means for feathering the paddles,
with ‘an eccentric carried directly by the dead axle by
fixing it to the ‘axle, such providing a mounting for a
regulator disc journaled on the eccentric that is part of
the feathering mechanism. In the other embodiment, a
live axle supports the paddle mounting, and the eccentric
at the center therof.
The disc is journaled on the ec
centric, with the eccentric received within bore 52. Rota
tion ‘of the regulator disc is thus about an axis offset from
the longitudinal axis ‘of the axle.
At 56 there is indicated a shroud plate or disc, having
substantially the same diameter as plates 3ft, 32. The
shroud plate is journaled on axle or shaft Ztl outwardly of
regulator disc 46. A cylindrical cover 58 fastened at one
is mounted in a stationary position‘ on the axle by means
end to plate 32 ‘and at its other end to plate or disc 56' con
accommodating rotation of the axle relative to the
nects the shroud plate and plate 32. The shroud plate
and cover constitute cover structure for the regulator
The features and objects discussed above, as well as 65 disc.
others related to the invention, will become more fully
The operation of the propulsion mechanism described
apparent as the following description is read in conjunc
should be ‘obvious. On movement of belt 44, sleeve 26 is
tion with the accompanying drawings, wherein‘:
rotated on axle 2d, and mounting plates 30, 32 are also
FIG. 1 is a top, plan view of propulsion mechanism
rotated. This causes movement of the paddles in a cir
constructed according to one embodiment of the inven
cular path or sweep about the longitudinal axis of the
tion, with portions broken away, and showing paddles in
sleeve and axle.
eca-use of the connection of the paddle
spindles with the o?set regulator disc, as the mounting
plates 30, 32 are rotated, the offset ends of the paddle
discs mounting the paddles have relatively large diameters
throughout their movement, are maintained in an up
means that some degree of protection is afforded the regu
lator disc.
It is claimed and desired to secure by Letters Patent:
1. In boat propulsion mechanism, an elongated dead
axle and means mounting the ends of the axle, sleeve
right position.
means journaled on said axle, plural paddles circum
spindles are maintained in the same relative position,
which is to the right of the main portion of ‘the paddle
spindles in FIGS. 1 and 2. The result is that the paddles,
The shroud plate and cover rotate as ‘a
ferentially spaced about said axle and sleeve means,
means connecting the paddles and sleeve means with the
and their mountings in the regulator disc.
10 paddles movable in circular sweeps about the axle, an
eccentric bearing member and means mounting it in ?xed
In the embodiment of the invention illustrated in FIG.
position on ‘said axle adjacent an end thereof, a regulator
3, and reference is now made to that ?gure, a live axle 6i}
member journaled on said heating member, and means
replaces the dead axle of the ?rst embodiment discussed.
connecting each paddle and said regulator member with
The axle is suitably journaled at its ends. Thus, the upper
end illustrated in FIG. 3 is journaled as in a bracket 62 15 the regulator member and paddles movable together and
the regulator member operable to feather the paddles on
secured to beam 12, and the lower end is journaled in a
movement of the paddles.
stationary sleeve 66 secured to beam 14. Plates '70‘, '72,
2. Boat propulsion mechanism comp-rising an elon
corresponding to plates 34?, 32 of the ?rst embodiment,
gated axle, means mounting the ends of the axle, a pair
are secured directly (as by Welding) to axle or shaft 60‘.
of mounting discs spaced longitudinally on the axle and
Paddles 74 are mounted on plates 7 0, 72 between plates
unit With plate 32, with the shroud plate and cover pro
tecting the regulator disc, the offset ends of the spindles,
7%), 72. These include paddle spindles 76, with o?set
mounted thereon, plural paddles spaced circumferentially
ends 75a. Ends 76a are journaled in a regulator disc or
about said axle and between and mounted on said mount
ing discs, a shroud disc to one side of one of the mount
ing discs and mounted on the axle, a bearing disc mounted
on the axle between the shroud disc and said one mount
plate 78, similar to plate or disc 46.
In this embodiment of the invention, as in the ?rst, an
eccentric is provided, such ‘being indicated ‘at St}. The
eccentric is mounted in a stationary position on the axle.
Thus, the eccentric is ?xedly joined to stationary sleeve 66.
At ‘82 there is indicated a shroud plate, similar to
plate 56 described in connection ‘with the ?rst embodi
ment of the invention. A cover connecting the shroud
plate and plate 72 is shown at 83.
Completing the description of the mechanism, axle 60
is rotated by 1a pulley 84 joined to the axle, ‘and a power
driven belt 86 trained over the pulley.
The ‘operation of the embodiment ‘of the invention
shown in FIG. 3 is substantially the same as the operation
of the ?rst mechanism illustrated in FIGS. 1 and 2. On
rotation of the ‘axle or shaft 6%), plates 7%, 72 are revolved,
with paddles 74 moved on rotation of the plates in a
circular path or sweep. The regulator disc rotates with
plates 7%, 72, maintaining the offset ends of the paddle
spindles in the same relative position. Thus, the paddles
'are kept upright at all times.
‘In both embodiments, it should be noted that a straight
shaft extending entirely through the propulsion mecha
nism is used, and that the paddles are moved through
the water by means connected to opposite ends of the
paddles and with the paddles balanced thereon. In both
embodiments the power for moving the paddles does not
come from the regulator disc, and the regulator disc only
follows, so to speak, the paddles, because of the connec—
tions of the paddle spindles with the regulator disc.
Consequently the offset ends 'of the paddle spindles are
not subjected to any appreciable twisting stresses in the
propulsion mechanism. Also important is the fact that
the outer margin :of the regulator disc is spaced from the
shaft not farther than the outer margins of the discs: or
plates mounting the paddles. This makes possible the
type of cover structure described for the regulator disc. 60
Should the cover structure be omitted, the fact that the
ing ‘disc, said bearing disc having ‘a circular bearing
surface with an axial center offset radially from the longi
tudinal axis of the axle, ‘a regulator disc journaled on
the bearing surface of said bearing disc, means connect
ing the regulator disc and each of the paddles whereby
the paddles are feathered by the regulator disc, and a
cover for the regulator disc and its connection with the
paddles, said cover extending between and being secured
to said one mounting disc and said shroud disc.
3. In a ‘boat having a hull, propulsion mechanism for
the boat comprising an elongated axle shaft and means
adjacent each end of the shaft securing it in a stationary
position on the hull, a rotatable sleeve journaled on
said shaft intermediate the ends thereof, a pair of paddle
mounting members spaced longitudinally on said sleeve
and secured thereto, plural paddles circumferentially
spaced about said sleeve disposed between and journaled
on said mounting members, means for rotating said sleeve
joined to said sleeve adjacent one of its ends and spaced
outwardly toward the said one end of said sleeve from
said mounting members, rotation of said sleeve being
operable to move said paddles in circular sweeps about
said axle shaft, an eccentric bearing member fastened to
said axle adjacent the end ofysaid sleeve opposite its said
one end, ‘a regulator member journaled on said eccentric
bearing member, and means connecting each paddle and
said regulator member whereby the regulator member is
operable to feather the paddles on movement of the
References Cited in the ?le of this patent
Nowak ______________ __ May 26, 1903
McOrosky ____________ __ Feb. 9, 1932
Hansen _____________ __ Jan. 10, 1933
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