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Патент USA US2404377

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Filed Jan. 3, 1944
JOHN 14 . Ill-77567
Patented July 23, 1946
John A. Herbst, Oradell, N. J., assignor' to Federal
Telephone and Radio Corporation, New York, ,
Y., a ‘corporation of Delaware
Application January 3, 1944, Serial No. 516,876
14 Claims.
(01. 74-40)
The present invention relates to improvements
in adjustment device, and more particularly to
a device whereby the angular position of one of
two interconnected shafts may ‘be adjusted rela
tive to the angular position of the other shaft.
be attached to any known type of device the .
There are numerous situations, as for example
in connection with radio transmitters and re
such means, such for example as a variable con
ceivers, in which it is desirable to rotate two
separate control shafts simultaneously, the
shafts being disposed in parallel relation or
otherwise not ‘in alignment. One instance of the
above would comprise the concurrent adjustment
of the usual spaced-apart condensers utilized for
tuning purposes.
It is often desirable, however, to provide not
only for the concurrent rotation of two such
shafts, but also for the individual adjustment of
one of these shafts relative to the other without
disturbing in any way the setting ‘of the shaft
tion. As indicated, shaft Ii has a greater degree
of resistance to rotation than shaft 8. ;
Shafts 6, 8 are positioned in substantially
parallel relationship.‘ Each of they shafts may
operation of which may be controlled through
denser. A dial I0 is provided for manually actu
ating shaft 6. A pair of drums l2, I4 are se
curely mounted on shafts 6, '8 respectively.
Drum N is partially hollow as shown.
An elongated ?exible connecting member en
circles, at least ‘partially, each of the drums l2,
l4. This ?exible member preferably comprises
‘a belt or rope l6 which is secured to drum [2 ,
at point l8, the latter constituting the mid
point of the singleturn of rope 16 around drum
l2 as illustrated.
Rope l6v is also wound once
around drum l4, and the ends of the rope after
the adjustment of which is not being made. Con 20 passing through openings IS ‘in the wall of the
ventional mechanisms for 'ganging together sev
drum, are joined together at 20. Thus the rope
eral condensers, for example, do not provide for
l6 has two portions "in, IE1) which are free of
this latter contingency.
drums l2, l4 and extend therebetween. A spring
It is accordingly the principal object of the
or other resilient element 22 secured to the in
present invention to provide a simple and inex
terior of drum l4 and also the junction point 20 I
pensive mechanism for permitting an individual
of rope l6 acts to maintain the rope‘ at the de
adjustment of the angular position of one of two
sired degree of tension, thus overcoming any
shafts, the two shafts being normally concur
loosening of the rope due to moisture or for other
rently rotatable by means of a single control.
It is a further object of the present invention
-Mounted between shafts 6, 8 is a third rotat
to provide a, flexible coupling between ‘two shafts,
able shaft 24, suitably pivoted by means such as
the coupling normally acting to cause simul
a bearing 26. A handle 28 permits manual rota
taneous rotation of both shafts upon manipula
tion of shaft 24.
tion of a single control, and to additionally pro
Secured to shaft 24 is a support 30 positioning
vide for the rotation of a single ‘one of‘ these
a pair of ?ngers 32, 34 in parallel spaced apart
shafts in response to a change in con?guration of
relation, these ?ngers being designed to pinch
the coupling.
in the two portions l6a, I?b of rope IB'so asto
Further objects and advantages will be ap
keep these rope portions normally in a slightly
parent from the following description of pre
bowed condition. Thus when handle 28 is in
ferred forms of the invention and from the‘draw-. 40 center position, the con?guration of rope I6 is
ing, in which:
approximately as shown in Fig. 2A.
Fig. 1 is a perspective view of a preferred 'form
Rope i6 is designed to slide freely over ?ngers '
of apparatus incorporating the present inven
32, 34. Therefore when handle 28 is in center
position, and the ?ngers 32, 34 have the rela
Fig. 2 is a set of diagrams illustrating the
principle of operation of the form of the inven
tion shown in Fig. 1; and
Fig. 3 is another set of diagrams illustrating '
the principle of operation of a, modi?ed form of
the apparatus shown in Fig. '1.
_ ,
In Fig. 1 is shown a pair of rotatable ‘shafts
' tion with'rope portions l6a, 16b as shown in Fig.
2A, a manipulation of dial l0 to rotate shaft 6
will also rotate shaft 8 due to the action of
rope I 6, which as above described is secured both
to drum l2 at point 18, and to drum l4 through
spring 22. Thus vmeans are provided for ‘rotat
ing both shafts '6, 8’ simultaneously and in the
6, 8, respectively mounted in bearings ‘I, 9, the
same direction upon manipulation of a single I
latter contacting their respective shafts with .
control. I
different degrees of friction so that the shafts
If it is now desired to rotate shaft 8 while main
will have different degrees of resistance to rota .55 taining the position of ‘shaft '6, handle 28 is actu
objects of my invention and the accompanying
ated. This actuation may be either clockwise or
counterclockwise. If the actuation is counter
clockwise, ?ngers 32, 34 will both move to the left
as viewed in Fig. 2B. Rope portions “5a., I61)
will assume the con?guration shown therein, or
in other words portion we will be straightened
I claim:
1'. A pair of rotatable shafts interconnected by
a belt-like driving element, means for relatively
impeding the rotation of one shaft. means caus
out, orshortened, and portion 1th will be fur
ing differential tensioning of two portions of the
belt-‘like element between shafts. tofrotate the
of ‘operation
'_ ' would
" f normally
other shaft.
result in drum l2 rotating clockwise and drum 10
2. A pair of rotatable shafts interconnected for
l4 rotating counterclockwise, each rotation being ' " driving operation one by the other by a belt-like
element, means for relatively impeding the rota
‘of the same magnitude. However, it has been~
tion of one shaft, means causing differential ten
stated that shafts 6, 8 have different degrees of
sioning of‘ two portions of the belt-like element
resistance to rotation. Since shaft‘? has a greater
degree of resistance to rotation than shaft 8, 15 ‘between shafts to rotate the other shaft.
' 3. A pair of rotatable shafts interconnected by
only drum 14 will rotate, and drum I2 will remain‘
a ‘belt-like driving element, means for giving one
stationary. This is indicated in Fig.‘ 2B, which
shaft greater resistance to rotation than the other
shows the unchanged position of point l8, while
shaft, means for normally applying tension to
point 20 has moved in a counterclockwise direc
tion. In Fig. 20 the same elements have been 20 both sides of the belt-like element, and means
for adjusting said last-mentioned means to'vai'y
shown ‘after a clockwise rotation ‘of handle 28.
saidtension differentially whereby one shaft is
In Fig. 3 two ?ngers 32’, 34' mounted on sup
rotated independently of the other.
port 35 have been positionedon the opposite side
4. In combination, a pair of. rotatable shafts,
of drum M from that on which drum I2 is located.
respectively associated with each of said
Fingers 32’, 34' are now mounted for rotation
shafts for producing different degrees of re
about a pivot 38 by means of handle 40. A pair
sistance to rotation'thereof, a belt-likeI-member
of pins 36 keep rope portions 160., I61) away from
said shafts, means‘ for rotating
the sides of drum It! so as to permit effective oper
one of said shafts, whereby upon operation of
ation of , the‘ adjusting assembly.‘ The shaft 6
saidlast-mentioned means said belt-like member
will, in this case, also have the greater resistance
cause simultaneous rotation of the other of
to rotation.
said shafts," adjustable means normally. acting to
‘The principal difference between the operation
draw together the interconnecting portions of said
of the device shown in Fig. 1 and the device of
belt-like member, and means for moving said
Fig. 3 is that in the former showing thev drum I4
adjustable means in a substantially lateral direc
rotates in the same direction as handle 23, while
tion whereby upon operation of said last men
in the latter'a' rotation of handle 40 counterclock
tioned means said belt-like member will cause ro
wise produoes av clockwisarot'ation of drum 14.
tation of the vshaft having the lesser degree of
As shown in'Fig. 33, this is due to the fact that
rope portion [6a is lengthened and portion 16b
shortened‘. ‘In Fig."3C the elements are shown
> resistance to rotation only.
I after a clockwise rotation of handle 4.
While ?exible connecting member l6 has been
describedas a roperor belt, other forms .of flexible‘
connectors such as 'a wire orfcord may beem
ployed in place'thereof. Also it is not necessary L
that rope It be wound around drums l2, l6. Rope
it can if desired encircle the shafts themselves
without any intermediate meansj Furthermore
rope IE need not encircle the shafts or drums for
more than approximately a half turn, the'only’ 50
requirement being that the rope be in non
slipping relation therewith. In addition tension
ing spring 22 may obviously be omitted if desired.
It should also be noted'that whereas the means
' for keeping shafts 6, 8 under different degrees -
of‘ tension has been described as a pair of bear-J
vin'gs ‘l, Q'engaging the shafts with different degrees
wholly or in parton the‘natu're of'the device to
adjustable means is; capable of‘ movement later
ally-in opposite directions, resulting in, a selective
rotation in either direction of "the shaft having
therlesser degree of resistance to rotation.
16. In a device of thetype in which a‘pair of
control shafts are disposed side-by-side in sub
stantially parallel relation, and-in which a belt
like connecting, memberhaving its ends joined
together encircles at least partially each of said
shafts in non-slipping relation, thereby forming
two portions of said belt-like member extending
between said shafts, the combination of means
respectively engaging each of said shafts for pro
ducing different degrees of resistance to rotation
thereof, adjustable means contacting each of said
belt-like member portions, and means for adjust
ing the position ofsaid last mentioned means so
. as to decrease the effective length’ of one of said
7 of friction, it will be clear that the degree of re
r'sistancerto rotation of each shaft may depend
5; Thecombination of claim:4, in which .said
portions and increase the effective length of the
7.. The combination of claim 6 vin-which said
which the shaft is connected. 1 In the case of the
. adjustable means includes a U-shaped element
_ usual variable condenser, for example, tension
iscontrolledby a screw which is adjustable to
positioned so that the portions of. said belt-like
member extending between said shafts frictionally
regulate the amount‘of force required to actuate
the rotor. . Many other tension-controlling mech
anismswill be readily apparent to those skilled
, in the. art, and 'it should. beunderstood that the
I invention is not limited to the one shown.
'While I have described. above thezprinciples
of my invention in connection with a‘ speci?c em
engage respective arms of. said u-shapedv-ele
V 8. The combination ‘of’ claim-6,¢with further
meansforrotating one-of said shafts-whereby
said .belt-likeconnecting member will act to ro- .
tate concurrently the other. Qfjisajzdivshalfts in re_
sponse thereto.
9. In a’ mechanism including. va 'Tpair I of icontrol
bodiment .and'a modi?cation thereof,- it is to be
clearly understood that this descriptionyis made
‘shafts disposed side-byeside in. ~substantially
only. by way of example and not as a limitation
parallel‘ relation; the combination,» of. means 1 re
' on the scope of my invention as set forth-inthe 75 spectively engaging each of said . shafts for "pro
ducing different degrees of resistance to rotation
thereof, an elongated ?exible connecting mem—
ber having its ends connected together, said
member being Wound at least once around each
shaft in non-slipping relation therewith, thereby
a plane perpendicular
two connections
to between
the shafts,
means between said shafts, said means compris
ing a belt-like memberghaving its ends connected
together and at least partially encircling each
of said shafts in non-slipping relation, thereby
forming two portions of said member extending
between said shafts, and adjustable means posi
tioned on the opposite side of one of said shafts
from the other of said shafts, said belt-like mem
means disposed between said shafts and acting
to draw said two connections together to tighten
ber slidably engaging said adjustable means,
same, means for moving said adjustable means '10 whereby upon selective adjustment of said ad
laterally, and means for rotating one of said
justable meansone of the said portions of said
shafts, whereby upon operation of said rotating
belt-like member will have its effective length
means said ?exible connecting member will cause
increased, and the other of said portions will have
a corresponding rotation of the other of said
its effective length decreased.
shafts, and whereby upon operation of said mov
13. The combination of claim 12, with further 7
ing means, said ?exible connecting-member will
stationary means slidably engaging each of said
cause rotation of the shaft having the lesser
portions of said belt-like member to cause said
degree of resistance to rotation only. ‘
member to assume a substantially outwardly
10. The combination of claim 9, further com
bowed con?guration, thereby preventing contact
prising resilient means connected to one of said
with said one shaft of that section of each of
shafts for maintaining said ?exible connecting
said portions lying between said other shaft and
member under a desired degree of tension.
said adjustable means.
11. The combination of claim 9, further com
14. ‘The combination of claim 12, in which said
prising a pair of drums respectively securely
adjustable means comprises a pivoted support,
mounted on said shafts, said ?exible connecting
and a pair of ?ngers on said support and dis
member being wound on said drums.v
posed on opposite sides of said pivot, the two said
_l2. In a device having a pair of rotatable shafts
portions of said belt-like member respectively
disposed side-by-side in substantially parallel‘
relation, the combination of ?exible connecting
slida'bly engaging said ?ngers.
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