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Патент USA US2132938

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Oct. 11, 1938.
w. (3. DUNN
Filed June 7, 1937
Patented Oct. 11,1938
" f i:
:William G.
Clarinda, Iowa
'Application June 7, 1937,v Seriavl'-No._148,704 ‘ V i
5y Claims.
(01. 250-33)
My invention has to do with an antenna pe
culiarly adapted for use on moving vehicles, such
as motor vehicles, boats, airplanes and the like.
More particularly it is my object to provide
an antenna of this kind mounted to permit the
ing driven into a low doorway of a garage and
so forth.
I have solvedthe problem by providing an
antenna adapted to lie ?at where it will be out
ofv’the way when the car is not moving or is 5
antenna to lie in position close- to the car body - traveling at low speed, the antenna being pro
when the car is standing or traveling “at low
speed, and to be moved to a distance‘farther
from the car when the car is traveling at higher
videdwith means'ffor taking advantage of the
air pressure available when the car is traveling,
ment and combination of the various parts of
for raising the antenna and moving it away
from the car. Thus the antenna will have its 10
maximum efficiency when the car is traveling
at high speed when maximum e?iciency is most
necessary for the proper operation of the radio
my antenna for moving vehicles, whereby the
With these and other objects in view, my in
vention consists in the construction, arrange
15 objects contemplated are ‘attained, as herein
after more fully set forth, pointed out‘ in my
claims, and illustrated in’ the accompanying
drawing, in which:
I have: shown in my drawing two forms in 15
which my invention may be embodied, andto
illustrate the fact that it may have a variety of
e '‘
Figure 1 is a top or plan view of a part of an
automobile equipped with a radio antenna em
bodying my invention.
Figure 2 is a front elevation of the same.
Figure 3 is an enlarged? plan view of the
mounting structure, parts being shown in sec
e - g
an egg shelllfopen atthe bottom and indicated
generally by thereference numeral I0, is shown
secured to the top of a car II by means'oi'
screws 12.
tion and parts being broken away.” '
' Figure 4 is a detail sectional view'ta'ken on
the line 4-4 of Figure 3.
In the particular ‘form shown in Figures 1-4
a metal case shaped a good deal like a half of 20
Figure 5 is aside elevation of a _'d_iiferent'form
‘Journalled' in the walls of the case ID are 25
parallel shaft-like members l3, preferably made
of stiff wire which form parts of wing-like an
tenna members A, each having generally the
shape of the outline of a wing and being formed
Figure 6 is a top or plan view of the mounting _ by means of wire material. The members l3 are _
structure of the device shown .in'll‘igure"§;_\and geared 'together‘by small gears ll.
of antenna.
Figure, '7v isamdetail séctionalview taken on
the line 1—1 of Figure 6.
3 Ul
Many attempts have been vmade to provide
satisfactory antennae for moving vehicles and
particularly for automobiles.
' The‘ rear ends“ of the antenna A normally lie
. on the top‘ofthe car H‘, as indicated in Figure 1
At low speeds, a very ordinary antenna is
sufficient to catch the radio signals as is later
made useful by the radio receiving set within
40 the vehicle, but at increasing speeds, due to the
sound or rushing of air past the vehicle, and
also due to the increased vibration and noise of
the mechanical parts of the vehicle, it is found
that a more e?icient aerial is then necessary.
H It has been'found that by raising the aerial
away from the metal parts of the vehicle as
nearly a 90° angle as possible that this e?iciency
is obtained.
In order to meet this problem, aerials of the
“buggy whip’? type have been provided. They
have been fairly ef?cient but they have not been
entirely satisfactory because of the fact, that
andrin full lines in Figure 2.
At the rear ends of the wing-like antenna
members A they are provided with blades IE or 03 5
the like, which may be of metal or other suitable
material, so shaped and arranged as to be en
gaged by the wind or air when the car travels
at considerable speed, whereby the antenna
members will be raised from their full line posi as
tion shown in Figure 2 to their dotted line posi
tion shown in that ?gure.
Thus when the car is stationary or traveling
slowly, the antenna will be down lying close
to the car top, and when the car is traveling cs5
rapidly, the antenna will automatically be raised
nearly upright for thus serving most efficiently
the purpose of an aerial.
The gears [4 are blank for a considerable por
tion of their circumference, so that they can
rotate for only certain distances. They are so
they project from the car in an objectionable
arranged that they partially support the antenna
fashion which often' prevents them frombe
members when the latter are in their lowered 65
2,132,938 v.
curved portions 29 and raise them upifor lifting
position to keep them from? wearing on the car
top, and they are aiso so shaped that whenethe
antenna members have swung. to their full line
position, shown in Figure 2, they can move no
the antenna to its dotted line position of Fig
I. This structure has all the advantages of the
first described embodiment of my invention.
7 It should be mentioned that the usual precau
An antenna of the kind just described is simple
and inexpensive to construct. It is not
the tions are taken. and arrangements made in
way when the car is standing in the garage or mounting the antenna. The casing l0 and the
being moved slowly into the garaga' It is amply, bracket I6 are insulatediro'm the car body and
the lead-in wires are connected to the antenna 10
10 ef?cient to- operate the radio when the car is not
proper and to the car body in the ordinary way.
traveling at high speeds.
‘ closer together.
As' will be seen from the double illustration
Its construction is such that the antenna mem
bers are raised to project away from the car when . ofmy invention, various changes may be made
the latteriis traveling at high speeds for thus
15 giving maximum efficiency’ when ‘such ef?iciency
isimost necessary.
in the construction and arrangement; of the
parts, andv it is my intention to cover the inven 15
tion as broadly as may be in my claims. '
in Figures 5 to 7 I have shown'another" form
of antenna. In this form of 1 device abracket , "
l6, comprising a_ bottom member I‘! "and lat
20 erally spaced side members I 8, is mounted on the
In this form of device the antenna is" a suitable
wire loop or U-shaped member 19 having long
arms, the? forward ends of which are curved up
25 wardly and forwardly as at 2!! (assuming the an
tenna to'be in its downqposition), and jour
I claim as my invention;
1. In a structure of the class described, an
antenna member, means for pivotally support
ing it on a moving vehicle, and means operatively 20
associated with it‘ adapted to be air' actuated for
raising; theantenna on its pivot when the ve
hicle is traveling.
2. An antenna for moving vehicles, means for
mounting the antenna for movement toward 25
and from the vehicle, a blade‘ioperatively asso
nalled on a cross pin 2| mounted in the upper ' ciated with said antenna and adapted to be ac
tuated by air when the vehicle is moving to move
parts of theside members I6; "
Another pin 22 is mounted in the side walls [8
30 below and rearward with relation to the .pin 2|.
. Pivotally mounted on ;the, sides I8, by being
.mounted on ‘ItheIpin 22, are arms 23 standing
the antenna ‘away from, the Vehicle.
3. The combination of an antenna, with means 30
for mountingzit pivotally on the top of a ve
hicle, 'a blade operatively associated Withfthe
The arms 23 extend forwardly and
antenna, arra'ngedto, be engaged and moved
by air when the vehicle travels at high speed,
35 normally lieclose to the, body of the car 24.
for raising the antenna toward'upright position.
belowtne' curved portions 20 and oppositely
:These arms at their forward ends carryia blade
4. An antenna, for moving'ivehicles combined
,with means for» pivotallyr mounting vsame on a
A spring 26 is arranged on the pins-2i and 22
vehicle, a member arranged to contactthe air
and ;is connected with Eone of'the arms ofthe
andl'move'the antenna away from the ;-vehicle
40 yoke 7| 9 in such manner 23.8 to help lift that yoke
and cushions its downward movement; and to
tend to hold itspaced just above the top of the
Normally when the car is standing or moving
45; slowly, the antenna “land the operating blade
:25 assume approximately» the positions shown
'in Figure
When, however, the car travels at
considerable speed and it is, desirable1 to have
the highest efficiency ~§rom the radio, the rush
of‘air from ingfront efthe windshield against
the under side ‘of ;the..blade - 25 ._will cause the
blade__25 ‘to’ move upwardly.» This causes?the
curved rearjends, oi'_ the arms 23 to engage the
when sameisémoving rapidly forward and allow 40
ing to lie'relatively close to the vehicle when
same is moving; forwardly slowly,
or stopped altogether.
backwardly, '
_ 5. The combinatiomwith an antenna, adapt
ed te normally lie relatively :close to the surface 45
of a/vehicle-when the vehicle is moving back
wardly, stopped entirely,v or traveling slowly in a
forward direction, and of ya pivoted member
adapted to contact the air and be moved away
from thesuiifaceof said vehicle when it reaches 50
.a predetermined forward speed, and to move the
antenna ‘.away'from, the vehicle. 7 p»
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