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Патент USA US2026917

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Jan- 7, 1936.]
E. .5. SMITH
- 2,026,911
'PROPELLING DEVICE
Filed April 17, 1934
2 Sheets—Sheet 1
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MINU/1”";
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INVENTOR/ -
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BY
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Jan. 7, 1936.
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E H, sMlTH
2,026,917
PROPELLING DEVICE
Filed April 17, 1954
2 Sheets-Sheet 2
INVENTOR‘
'_
EARL HOUSER SMITH
ATTORNEYS
2,026,917
Patented Jan. 7, 1936
UNITED STATES
PATENT OFFICE.
2,026,917
PROPELLING DEVICE
'
Earl House: Smith, Flushing, N. Y.
Application April 17,1934, Serial No. 720,919
14 Claims. (Cl. 170-162)
With ‘the above recited and other objects in
This invention has general relation to propellers
and, while not necessarily restricted to such' use,
the same is primarily concerned with propelling
view, reference is now made to the following spec
i?cation and accompanying‘ drawings in which
- there has been illustrated by way of example a
devices for air-craft.
preferred embodiment of the invention, while the 5
'
Propellers
for
air-craft
which
have
heretofore
5
appended claims cover variations and modi?ca
been in use, have lacked considerable in effi
ciency which is mainly attributed to the fact tions thereof which fall within their scope.
In the drawings:
that the propeller blades follow in the wake of
Fig. 1 is a perspective view of a propeller con
one another and create such a disturbance or
structed in accordance with the present inven- 10
10 turbulence as to seriously interfere with the pro
pulsive force exerted, it being common knowledge tion.
Fig. 2 is a perspective view with the hub casing
that only the extreme outer ends or tip portions
‘of the blades exert any appreciable propulsive removed to disclose the gearing arrangement. '
Fig. 3 is a longitudinal sectional view through
force.
‘
the
propeller taken approximately on the line 15
t It is, therefore, an object of the present inven
16
tion‘ to provide an improved propeller in which
this interference is materially overcome by so
mounting and moving the blades with reference
, to each‘ other that each blade throughout sub
20 stantially its entire length acts upon an undis
turbed medium to obtain a highly efficient pro
pulsive force.
7
I
The invention ‘more particularly comprehends
a propelling device including a driven rotary hub
and circumferentially spaced blades each of which
protrudes from the hub in a generally radial di
rection with means for imparting movement to
the blades so as to cause the same to respectively
3-3 of Fig. 4.
>
_
Fig. 4 is a transverse sectional view there?
through taken approximately on the line 4—4
of Fig. 3-.
i
Fig. 5 is a detail sectional view taken approxi-‘20
mately on the line 5--5 of Fig. 4.
.
Referring to the drawings by characters of ref
erence, l0 designates a driven rotary propeller
shaft which extends through a ?xed or non-rotary
gear I I and which gear has connected therewith 25
an annulus l2 having an arcuate bearing con
cavity |3 on its outer face, the inner end por
tion of the annulus being mounted in a recess
M formed in the outer end of the ?xed gear H
travel in conical paths, while ‘moving bodily with
and being secured against rotation by splines l5. 30
30 the hub about itsaxis of rotation.
The propeller further includes a sectional hub
The invention further contemplates a propel- '
ling device of the indicated character which, due
to its construction and arrangement, and the for-'
. ward movement of the craft on which it is mount
ed, 'causes any selected point on the blades to
travel'in a succession of contiguous arcs while
following a generally‘ spiral path.
_
structure made up of ‘inner and outer mating
casing sections,which sections are generally des
ignated by the reference characters l6 and I1,
and which sections are secured together in any
desired manner but as illustrated by way of ex
ample, the sectidns are provided with comple
mentary flanges. I8 and I9 through which bolts
More speci?cally the' invention embodies a
driven rotary‘ shaft, a hub secured to the shaft 20 extend. The hub structure‘comprises a hol
low generally cylindrical central'casing portion 40
40 for rotation therewith, a gear concentric to and
2| having its axis concentric to the axis of the
?xed with reference to the shaft and hub, circum
propeller shaft Ill. The hub structure further ‘
ferentially spaced blades'protruding in a gen
‘erallyradial direction through the hub, an ec . includes a plurality of hollow cylindrical casing
centric for each blade mounted to turn ‘in the members 22, two being shown in the present in
_ stance, but it is to be understood that more than 45
45 hub on radial axes perpendicular to the shaft
and hub axes, and planetary gears meshing with two may be employed within the scope of the
the ?xed gear and connected with the eccentrics invention. The casing members 22 in the’ em-.
for turning the same upon rotation of the shaft bodiment. shown have their axes disposed in
alignment and on a line perpendicular to and
and hub. "
The invention 'further resides in a propelling intersecting the-axis of the propeller shaft I0 50
50
device of the indicated character which is not and the axis of the hollow cylindrical central '
unduly complicated in its structure, which. may portion 2|, the members 22 being in open [email protected]
be economically produced, which possesses the munication at their inner ends with the central
requisite strength and which is highly e?icient portion 2|. The outer end wall 23 of the central
- portion 2| of the hub structure is provided with 55
for its intended'purpose. ,
56
2
2,020,917
an axial bore 24, through which the outer end
of the propeller shaft ll extends and with which
it is connected for rotation therewith by splines
or equivalent means 25 so that the hub is driven
the blades will move in a succession of contigu
ous arcs, while due to the forward movement of
the craft on which the propeller is mounted, the
by and turned with the propeller shaft. The. succession of contiguous arcs in which the blades.
outer end of- the shaft is threaded at 20 and a are travelling will follow a generally spiral path.‘ ’ 5
nut 21 is threadedly engaged therein. The in
ner face of the outer ‘end wall 23 is formed with
an arcuate bearing concavity 28 confronting the
10 bearing concavity it of the annulus i2 and so
located with reference thereto-that the arcs of
said concavities l3 and 28' are struck from a com
mon center located at the intersection of the
axes of the propeller shaft II and the axial line
15 passing through the members 22. The ?xed gear
ll extends~through an opening 2! in the rear
end wall 30 of the central portion 2| of- the hub
structure and a suitable roller or anti-friction
bearing 3| is interposed between the hub struc
20 ture and the ?xed gear at this point.
The arcuate bearing concavities I3 and II
are of semi-spherical formation and have mount
ed therebetween for universal rocking movement,
30
a spherical element or ball}: which is pro
vided with a bore 33 through which the propeller
shaft it extends, the bore having a constricted
central diameter 34 approximating the diameter
of the propeller shaft IO and the remaining op
posite portions of the bore being of outwardly
?ared, frusto-conical formation and of increasing
diameters towards the outer'ends of the bore
which open through the periphery of the ball or
spherical element 32. The ball or spherical ele
The non-rotary gear H may be anchored in
any desired manner to a ?xed support but in the
embodiment illustrated, the protruding rear end
of the gear is secured by splines ii to a ?ange
52 which in turn is bolted as at 53 to the nose 10
or forward end of the fuselage or to a- motor cas
ing or other equivalent support 84. In order to
secure the gear and ?ange in assembled relation,
the rear terminal of the gear II which protrudes
from the flange 52 is externally threaded as at 15
ii and a lock nut Ii is applied thereto.
Due to this construction and arrangement, it
will be apparent that one propeller'blade 31 will .
follow a path further removed from the wake
of the preceding blade than in propellers having :0
?xed radial blades, so as to be less affected by the
turbulence or disturbance thereof and hence the
blades will act upon a denser medium so as to
impart a more e?'ectiv'e or sufficient propulsive
force than where the blades follow in the wake g5
of»each other. Furthermore, due to the move
ment and action of the blades a substantially con
tinuous'and uniformly effective propelling thrust
will be exerted throughout the entire cycle of
movement of each blade.
What is claimed. is:
I
v
so
1. A propelling device including a rotary driven
ment I2 is provided with diametrical oppositely - shaft, a hub‘ secured thereto, c'ircumferentially
35 protruding integral arms 35 having concentric
sockets 36 opening through the outer ends and
extending inwardly therefrom. The propeller
blades 31, which may .be of any desired design,
have shanks It at their inner ends, the termi
40 nals of which are ?tted in the sockets 36 of the
arms I! and are secured therein by keys 39. _ The
shanks 30 are each formed with a substantially
spherical bearing 40 which is snugly ?tted in an
eccentric bearing opening 4i in a rotary eccen
45 tric disc 42 which is ‘preferably split or made up
of mating semi-circular sections 43 and 44 to
facilitate the assembly thereof. The eccentric
discs are secured within the outer ends of cylin
spaced blades mounted on the hub and protrud
ing in generally radial directions therefrom, and 86
coacting means for imparting gyratory motion to
the blades during the rotation of the shaft and
hub so as to cause any point on each blade
to travel in a succession of contiguous arcs and
in a generally spiral path due to the combined 40
gyratory motion of the blades and the forward
movement of the device.
2. A propelling device including a rotary driven
shaft, a hub secured thereto, circumferentlally
spaced blades mounted on and protruding from 45
the hub in generally radial directions and coact
ing means on the hub and on a ?xed element for
drical ‘sleeves 45 for turning movement there
causing the blades to travel in a conical path
equivalent keying arrangement. The cylindrical
therewith.
50 with and are secured thereto by splines 4C or an
with reference to the hub while rotating bodily
//
50
3. A propelling device including a hub, cir
_ sleeves 45 extend partially into annular. bosses ' cumferentially spaced blades carried by and pro
41 which protrude outwardly from the members truding from the hub, a rotary-driven shaft op
55
22 of the hub structure and the axes of said ‘ eratively connected with the hub for imparting
sleeves coincide with the axes of the members rotational movement to the hub and turning of 65
22. Anti-friction bearings 48 are interposed be
the-blades therewith around the axis of the shaft
tween a portion of each sleeve 45 and each mem
and coacting means for causing the blades to
ber 22. The innermost ends of the sleeves 45 travel in conical paths with reference to the hub
are each formed or otherwise provided with a
while rotating therewith.
beveled gear 4!, the teeth of which mesh with the
beveled gear teeth 50 of the ?xed gear Ii where
by upon-rotation of the propeller shaft II and
cumferentially spaced blades carried by and'pro
4. A propelling device including a hub, cir- co
truding from the hub, a rotary driven shaft op
the hub structure with reference to the ?xed gear eratively connected with the hub for imparting
H, the gears 49 are caused to planet around the rotational movement to the hub and turningof
?xed gear ll so that the sleeves 4‘, while mov I the blades therewith around the axis of the shaft 55
ing bodily with the hub structure and propeller and coacting means for causing the blades to
shaft II, are caused to rotate on their own axes. _ travel in conical paths on axes perpendicular to
the axes of rotation of the shaft and hub and with '
' with reference to the hub. This relative rota
tionof the sleeves imparts through the medium
of eccentric discs 42 a relativeorbital movement
of the propeller blades so that they travel in a
substantially conical or gyratory path of move
ment. However. due to the bodily movement of
the blades about the hub, anyseleeted point on
reference to the hub while bodily rotating there
with
5. A propelling device including a driven rotary
shaft, blades carried by the shaft for bodily ro
tational movement therewith, andmeans oper
.able by rotation of the shaft for imparting an
7o
orbital movement of the blades .with reference 7'
3
2,026,917
to the shaft while the blades are rotating bodily
therewith.
.
g
>
6. A propelling device including a driven ro
'
.
‘
,
limited universal rocking movement with ref
erence to the shaft, blades having shanks mount
ed and secured in said arms and means oper
able by rotation of the shaft for causing the
turning movement in a circular path with and blade supporting unit and blades to turn with 5
about the shaft, and means for causing the blades and annularly around the axis of the shaft and
to move in a gyratory pathwith reference to the for‘ causing said blades each to move around an
shaft and on axes perpendicular to the axis of the axis perpendicular to the axis of the shaft and
in a conical path with reference to said' per
shaft.
pendicular axis.
10
7. A propelling device including a driven ro
\11. A propelling device including a driven ro
tary shaft, a plurality of blades carried by the
shaft for limited universal rocking movement with‘ tary shaft, a plurality of blades carried by the
reference thereto and protruding from the shaft shaft for limited universal rocking movement
in generally radial directionsyand means oper ~with reference thereto and protruding in a gen
able by rotation of the shaftfor causing the erally radial direction therefrom, a hub secured 15
blades to ‘turn 'with and annularly around the to said shaft for rotation therewith, means lo
axis of the shaft and for causing said blades cated in the hub’ and operably connected with
each to move around an axis perpendicular to the the blades for causing the same to turn with
and annularly around the axis of the .shaft and
axis of the shaft and at an angle to said perpen
tary shaft, blades carried by the shaft for bodily
dicular axis.
.
8. A propelling device including a driven ro
tary shaft, a blade supporting unit mounted on
the shaft for limited universal rocking move
IS -1
ment with reference thereto, blades carried by
said unit extending therefrom in generally radial
directions with reference to the axis of the shaft
‘ and means operable by rotation of the shaft for
causing the blades to turn with and annularly
varound the axis of the shaft and for causing the
‘
30
same to each move in a conical path around an
axis perpendicular to the axis of the shaft.
'
9. A propelling device including a driven ro
tary shaft, a blade supporting ‘ unit comprising
for causing said blades to each move around 20
an axis perpendicular to the shaft axis.
f
'12.,A propelling device including a driven ro
tary shaft, a hub secured to the shaft for ro
tation therewith, a gear concentric to and ?xed
with reference to the. shaft and the axis of 25
rotation of the hub, circumferentially spaced
blades protruding in a generally radial direction
through the hub,‘an eccentric for each blade
mounted to turn in the hub on radial axes per
pendicular to the axis of rotation of the shaft 30.
and hub,,and planetary gears meshing with the
fixed gear and connected with the eccentrics for
turning the same upon rotation of the shaft and ‘
hub.
13. A propelling device including a rotary 35
driven
shaft, blades for bodily turning therewith
limited universal rocking movement with refer
ence to the shaft, blades having shanks mounted annularly around the axis of the shaft and means
and secured‘in said arms and means operable for imparting an orbital movement to the blades
by rotation of the shaft for causing the blade ‘around an axis perpendicular to the shaft axis
while turning with the shaft.
‘0
40 supporting unit and blades to turn with. and
14. A propelling device including a blade hav
annularly around the axis of the shaft and for
a spherical central portion and radial socketed
arms, and means for mounting said unit for
causing said blades each to move in a conical
ing a shank at the inner end thereof, means
for mounting the free inner terminal of the shank
{for universal movement, and an eccentric spaced
of the shaft.
_
from said inner terminal of the shank for im- ‘5
10. A propelling device including a driven ro
45.
tary shaft, a blade supporting unit comprising parting motion vto the blade to cause the same
path.
a spherical central portion and radial socketed to travel in a conical EARL
HOUSER SMITH.
arms, and means for mounting said unit for
path around an axis perpendicular to the axis
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