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Патент USA US2404528

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July 23, 1946.
Filed oct.’ 19, 1942
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'2 sheets-'sheet 1"
Äuäy 23, E946.
> EAW-i252
Filed Oct. 19, 1942
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2 Sheets-Sheet 2
à Q
Patented July 23, 1946
Dan R. Rankin and George A. Reynolds, Jr., Los
Angeles, Calif., assignors to Food Machinery
Corporation, San. Jose, Calif., a corporationof
Application October 19, 1942, Serial No. 462,484
6 Claims. (Cl. 115--1)
"This invention relates to the art, of steering
amphibious land and Water craft while in the
water. It is especially useful on amphibious
An object of the invention is to provide an im
proved steering mechanism. for use on amphibious
tanks which will be relatively simple and require
to cause mechanism I6
to operate with incr-easedv
On the other hand, releasing lever 21`
and pulling. on the lever 28> has the opposit ~
As shown in Figs. 3 and 4, each of the mecha
nisms l I5 and I6 has a track forming belt 35»
which is provided with an endless series of grous
ers 36, this belt travelling upwardly around an
idler sprocket 31 at the stern of the craft. As
It is another object of the invention to provide 10' the grousers 36 come out of the water in rising
a minimum of mechanism for controlling the
upwardly toward the sprocket 31, they create a
a steering mechanism for controlling amphibious
military tanks in the water which functions with
out any special control apparatus and merely by
stream of water 38 >which at all .times is dis
charged rearwardly from this mechanism through
selective driving of the track laying belts provided
the air above the water sustaining the craft. ’
Fixed as by welding to the rear face of the hull
on opposite sides of the tank.
I I` along the upper and outer corner edges there
It is a further object of the invention to provide
of are angle irons forming horizontal and verti
a device for steering amphibious military tanks
cal flanges 39 and 39’. Welded onto the'sides
in the water which comprises, in addition> to
of the hull II and extending outwardly over the
equipment already provided on the tank neces
sary for its locomotion on land andY in the water, 20 mechanisms l5 and I6 are guard plates 40. These
are flush with the top of the rear corners of the
only parts which are rigidly fixed on the body of
engine compartment I2 of the hull and extend
the tank.
rearwardly flush‘with the rear edges of flanges
’I'he manner of accomplishing the foregoingv
39. Each guard plate 40 has welded to its outer
objects as well as further objects and advantages
side edge to extend- downwardly therefrom, a
will be made manifest in the following descrip
gusset guard 4I, the forward edge of which is
tion taken in connection with the accompanying
preferably concentric with the sprocket 31, and
drawings in which
Fig. 1 is a diagrammatic plan view of an am
the rear edge of which lies in the same vertical
, plane with rear edges` of the flanges 39 and the
phibious military tank equippedwith a, preferred
embodiment of the steering device of the inven 30 plates 40.
Secured to each plate 40, as by Welding its'
tion, said tank being shown while turning in re
front edge to the bottom of said plate, and with
sponse to the operation of said device.
its rear edge lying. against and flush with the rear
Fig. 2 is an enlarged fragmentary plan of the
edge vof said plate 40 is a horizontally inclined
right hand rudder group of the invention,
Fig. 3 is a rear elevational view of Fig. 2 taken
in the direction of arrow 3.
Fig. 4 is a right side elevational View of Fig. 2
taken in the direction of arrow 4.
Fig. 5 is a diagrammatical vertical sectional
view taken on line 5,-5 of Figs. 2 and 3.
member 42. `
II are water deflector devices 43 and 43', which
are reverse duplicates of each other. Each of
these devices includes top and bottom plates 44
Referring specifically to the drawings, the
‘I and 45 which are welded to a relatively deepouter
def-lector blade 46 and to inner deñector blades
amphibian tank l0 shown in Fig. 1 has a buoyant
hull vII embodying an engine compartment I2 in
48», 49 and 50. Each of the devices 43 and 43’ is
attached to the tank I0 by bolts 54 which fasten
which a radial engine I3 is housed and a control
cabin I4 located at the front end of the craft.
Mounted on the rear upper corners of the hull
, ._ it securely to the adjacent ñanges 39 and 39", and
-‘ Vto rear edges of the adjacent plate 40 and gusset "
guard 4 I.
Disposed along opposite sides of the hull are track
The deflectors 46, 48, 49 and 50 of each of the
laying mechanisms I5 and IB, these being driven
devices 43 and 43’ are inclined inwardly, as
by the motor I3 through a drive shaft I1, a
clearly indicated in Figs. 1 and 2, and are dis
transmission I8, a differential I9, shafts 2| and
22, and sprockets 23 and 24. Shafts 2| and 22 50 posed in the paths of the two streams of water
3B discharged rearwardly from the grousers 36
are provided with brakes 25 and 26 which are
of the track laying mechanisms l5 and I6,
controlled respectively by levers 21 and 28 pro
These streams of water are thus deflected ln
vided in the control cabin I4. Thus, pulling on
wardly resulting in a considerable side thrust
the lever 21 applies the -brake 25 to retard the
being set up vagainst each of the devices 43 andA
operation of the track laying mechanism I5 and
V43' when both of the mechanisms l5 and I6 are
operating. When one of these mechanisms is
said hull for deflecting said streams of water in
wardly; and means for controlling the driving of
slowed, however, by pulling one of the levers 21
said belts so that these may be selectively driven.
2. A combination as in claim 1 in which said
deflecting means on each side of said craft in
cludes a relatively deep outer deflector and Vat
Y or 28, which also causesthe other mechanism to
`operate even more rapidly, the unbalanced thrust
thus developed at the rear end of the hull Il by
the stream-of water 38 from the trackA laying
mechanism which is running at an accelerated
rate produces a turning movement of the craft I0
in the opposite direction.
least one relatively shallow'inner deflector, said
deñectors being mounted upon a relatively hori
zontal plate secured to the aforesaid hull of said
This is well illustrated in Fig. 1 where the lever
21 is shown as pulled back to retard the mecha
3. In a dirigible water craft the combination
of: ypropulsion means provided on opposite sides
nism I5 and accelerate the operation of the
. of said craft, said means in their operation dis
mechanism I6. The result of this is to turn the l
charging streams of water rearwardly through
craft l0 to the left. The reverse operation ac 4l5 the air above the surface of the water sustaining
complished by releasing lthe lever 21 and pulling
said craft; deflectors mounted on said craft and
on the lever 28 produces exactly the opposite ‘
fixed in the path of said streams of water to de
flect thesame oppositely; and means for selec
The hollow construction of the outer blades 4S
tively controlling the operation of said propul
of the devices 43 and 43" is for purposes of giv 20 sion means to effect a steering of said craft by
ln-g these deflectors strength to resist the shocks '
tot which they are subjected 'when the tank. l0 ~ said
l 4. In aY dirigible 4water craft the combination
backs up into brush, trees or jungle growth. The
of : propulsion means provided on opposite sides
purpose -of making these outer blades longer than
of said craft, said means in their operation dis
the’inner blades 48, 49, and 50 is to catch and 25 charging streams of water rearwardly throughY
conflne‘the streams 38 from spraying out lateral
the air above the surface ofthe water sustaining »
1y sideways from the tank.Y
craft; fixed deñectors mounted on said craft>
Another very useful function performed byv
and disposed in the path of said streams of water
the devices 43 and 43’ is to confine and deflect
the water streams'38 downwardly as well as in-V 30 to deflect -said streams sideways in opposite di
rections;- and means for selectively controlling
wardly from the paths along which they are
the operation of said propulsion means toleffect..
l travellingwhen they impinge against these de-„
a steering of said craft by said deflectors.
vices. This greatly reduces the visibility of these
5. In a dirigible water craft, the combination
` streams and diminishes the ability of the enemy
of: a hull; right and left hand propulsion means
to detect -the approach of these tanks, especially
provided on opposite lsides of vsaid hull, each of
where they‘are operating in phosphorescent water
at night.
said means in its operation discharging a stream
Where a tank carries armor on the
of» water rearwardly through the air, above the
control cabin I4 'it is highly desirable to depress
surface of the water sustaining said craft; means
the rearof the tank, as this increases the operat
1 ing efficiency `of the tank in the surf and at sea. 40 for controlling the operation of said right and left
hand propulsion Ymeans, to drive these simul-v
The inclined members 42 deflect rearwardly
taneously orV separately; and deflector-means
1 the portions of streams 38 engaging these mem
fixed- in the paths of said streams so asr to- de
bers, thereby decreasing the “lift” on the rear
flect the latter inwardly, whereby the driving of
I end of the tank which would otherwise be caused `
, one of said propulsion means at a higher speed v
by controlling these streams and utilizing them
than the other causes an unbalanced turning m0»
. in steering the tank.
ment to be produced by the reaction of the de-v
flector means to the stream produced byY the
It is thus seen that we have provided a means
for steering amphibian craft without the addi
tion of any moving parts, the steering being ac
È complished by manipulating the controls for the
faster moving propulsion means.
rearwardly; means for controlling the operation'
1 diminishes the ability of the enemy to detect the `
of: .a hull; right and left hand propulsion means
provided on opposite sides of said hull, `each of
said means in its operation dischargingV water
3 track laying mechanisms which are a part of the
It is Vfurtherclear that the means we have provided for this
. ordinary propulsiva equipment.
approach of tanks equipped with our invention.V
6. In a dirigible water craft, the „combination
55 of said right and left hand propulsion means, to
drive these Simultaneously or separately; and de- -_
ñector means fixed in the paths of said discharged
water so as to deflect the latter inwardly, where,-`
by the driving of one of said propulsionV means at
1: In an amphibian craft, the combination of: ‘
l a hull; right and left hand track laying belts on »
the opposite sides of said hull; an endless series
. of blades'on said belts for engaging the water 60 a higher speed than the other causes an unbalf
` when said craft is añoat; -power means for driv-
1 ing said belts to propel said craft through the,`
anced turning moment to 4be produced by the
reaction of the deflector means to the waterdis
charged by the faster moving propulsion means.:
l water, said blades- on ‘said belts discharging
‘ streams of water rearwardly above the surface of
- '
‘ the water sustaining said craft; Vmeans fixed on 65
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