close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2114540

код для вставки
April 19, 1938.
v. c. MACNABB
2,114,540
TUNING MECHANISM FOR RADIO APPARATUS
Filed March 8, 1937
v
3 Sheets-Sheet l
.
3—*
INVENTOR.
VEA’Nd/V CI MiG/V1458
BYGZML 4. A,”
A TTORNE Y.
April 19, 1938.
v. c. MACNABB
2,114,540
TUNING MECHANISM FOR RADIO APPARATUS
Filed March 8, 1957
5 Sheets-Sheet v2
/4
15
~
INVENTOR
VERNON 6! Mac/V1455
‘GEM/.4544“,
A TTORNEY.
April 19, 1938.
v_ c, MACNABB
.
2,114,540
TUNING MECHANISM FOR RADIO APPARATUS
Filed March 8, 1957
3 Sheets-Sheet 3
*
INVENTOR.
VERA/01v CT Mac/v0.95
BYQMKQAQV
ATTORNEY. I
2,1145%
Patented Apr. 19, 1938
UNITED STATES PATENT OFFIQE
2,1 14,540
TUNING MECHANISM FOR RAD-IO
APPARATUS
Vernon C‘. Macnabb, Indianapolis, Ind., assignor
to Fairbanks, Morse & 00., Chicago, 111., a cor
poration of Illinois
Application March 8, 1937, Serial No. 129,639
12 Claims. (Cl. 116—124.1)
This invention relates to tuning mechanism for
radio apparatus, and more particularly to an im
proved tuning dial organization for radios of
multiple wave-band type.
for these parts in Fig. 4; Fig. 6 is a view in de
tail, of a portion of the mechanism shown by Fig.
4; Fig. '7 is a sectional view of a part of the
mechanism, as taken along line 'L-‘l in Fig. 4,
It has been the general practice heretofore, to ' and Fig. 8 is an elevation shown partly in sec
provide in connection with multiple wave-band tion, of the mechanism of Fig. 4, as viewed from
radio apparatus, a single tuning dial having
thereon tuning indicia for the several bands. One
of the disadvantages of such a dial arrangement
10 is that all of the tuning indicia are simultane
ously visible, resulting in many instances, in a
confusion of wave band indication during tuning.
Moreover, where all the indicia for aplurality of
wave bands are simultaneously visible, the ar
ray of indicia offers of itself a degree of con
fusion to the operator. Accordingly‘, it is an.
object of the present invention to provide a radio
tuning indicator characterized by the selective
display of the tuning indicia for but one wave
band at a time.
Among other objects of the invention are
the provision of a tuning indicator for a multi
wave band radio having visible only the band in
dicia of the particular wave band‘ desired; the pro
vision of a tuning indicator having a separate dial
member for each wave band, with the dial mem
bers relatively displaceable so that only one there
of will be visible at any one time, and the provi
sion of regulating means for the indicator, adapt
ed to operate the several dial members in sequence
to obtain the visibility of but one dial member
at a time, the regulating means‘being operated
preferably by the control element provided for
changing the circuit arrangement of the radio
“ from one wave-band to another.
Further objects and advantages will appear
from the description and accompanying draw
ings, in which:
Fig. 1 is a front elevation of a partly assembled
4
radio chassis, illustrating the improved wave
band indicator of this invention; Fig. 2 is a frag
mentary plan view of the radio chassis of Fig. 1,
showing the front panel of the radio in section,
and the disposition of the indicator mechanism
relative thereto; Fig. 3 is an enlarged, fragmen
tary sectional elevation of the radio chassis and
front panel, illustrating certain details of the im
proved indicator, the view being taken from line
3-3 in Fig. 1; Fig. 4 is an enlarged side elevation
of a part of the indicator, with portions thereof
shown in section, as taken along line 4-4 in
Fig. 1; Fig. 5 is a front elevation of the device
shown by Fig. 5, as viewed from line 5-5 thereon,
the View, however, showing certain of the ele
55 ments in an altered position from that indicated
line 8-—8 thereon.
Referring now to the drawings by suitable nu
merals of reference, the improved indicator is
operatively associated with the tuning mecha 10
nism of a multi-wave band radio, as will now ap
pear. As shown in Figs. 1, 2, and 3, the radio‘
chassis is indicated generally at if], the chassis
supporting the radio instruments and apparatus,
as for example, a multiple capacity unit of vari
able type indicated at H, and a multiple circuit
switching device l2 provided for adjusting the
apparatus to receive signals in any one of a num
ber of different wave bands. The switching de
vice I2 is operated by a shaft 13 extending‘ to the
front of the radio panel [4, the shaft‘being pro
vided with a control handle or knob 15 for manual
manipulation thereof. For convenience and
simplicity of control, the shaft l3 controlling the
shifting of the circuit connections to accommo 25
date the different wave bands, is utilized to regu
late the wave band indicator mechanism now to
be described.v
The panel 14 is provided with an opening 16 of
square, circular or other desired con?guration, “
the opening being closed preferably on the back
or inner face of the panel, by a transparent mem
ber I‘! such as a glass plate. By preference, the
glass H is carried by a substantially rigid opaque
member or mask 18 formed of either metallic or
non-metallic sheet material, the mask it being
supported by the chassis H] in any suitable'man
ner, as by the bolts l9 and spacer sleeves 20 ex
tending between the member and a bracket 28
secured to a side wall 22 of the chassis. Mount
ing of the glass H on the mask it may be ef
fected in any desired manner, as by the clips 2E3v
shown in Fig. 1, As appears in Figs. 2 and 3, the
sleeves 20 serve to space the member 18 and glass
ll outwardly of the chassis wall 22 so that in the '
assembly relation of the chassis I0 and panel Hi,
the glass will seat against the inner side of the
panel in a position to close the panel opening l6.
Referring to Figs. 1 and 3, the mask I8 is pro
vided with a substantially semi-circular opening
or window 24 to permit observation of tuning
indicia disposed on relatively displaceable dial
elements arranged rearwardly of the member 18,
as will later appear. In addition, a second slot
or Window 25 of smaller extent is formed in the 55
2
2,114,540
member l8, above the slot 24 in the position
shown in Fig. 1, this second slot being provided
upon a sleeve 39 mounted on a shaft or plunger
to permit observation of wave band indicia asso
37, as shown in Fig. 4. As a. means for prevent
ing frictional or rubbing contact between adja
4|, the sleeve extending through the extensions
ciated with the tuning indicia, as will be presently
described. Arranged rearwardly of and in rela
tively close adjacence to the member l8, are a
plurality of substantially semi-circular dial ele
ments, four being shown in the present example,
and numbered 26, 2'1, 28, and 29, the element 26
10 being that closest to the member l8. The elements are formed of relatively thin, sheet mate
cent dial elements, and also for providing greater
rigidity of the elements at the zone of pivotal
support, each of the elements is secured in any
suitable manner, to a spacer member 42. The
dial extensions and spacers are con?ned longi
.
tudinally of the sleeve, between a shoulder 44 10
formed on one end of the sleeve and a removable
rial, such as steel, aluminum or bakelite, and
end plate 45 at the opposite end of the sleeve,
each is provided with .a portion 39 extended up- ' the plate 45 being retained in assembly by a screw
wardly from the mid-section of the semi-circular
15 portion of the element, for a purpose presently
to appear. As shown in Figs. 2 and 3, the ele
ments are arranged in horizontally spaced rela
tion, one in back of another, so that in the posi
longitudinal displacement of the sleeve 39 on 15
shaft 4|, the shaft end 40 is formed of reduced
diameter, to provide a shoulder 47 against which
the shouldered sleeve end 44 seats, in the assem
tion shown, only the element 26 will have sur
bly of the parts.
20 face portions thereof in register with and ex
posed through the slots 24 and 25, respectively.
Arranged along that surface of the dial element
26 which is exposed through the slot 24, are tun
ing 'graduations 3| and wave length indicia 32.
25 The surface of the extension 39 on element 26
which is exposed through the slot 25, is provided
with a suitable indicator of the wave band cor
responding to the graduations 3| and wave length
indicia 32, this indicator in the present example,
30 being the word “Broadcast”.
Each of the re
maining elements 21, 28, and 29 is similarly pro
vided with an indicator of a particular wave
band and indicia of wave length corresponding
thereto, although such indicia and, band indi
35 cators are not shown in the present disclosure.
It is understood, of course, that the dial elements
are associated with a variable tuning device of
the radio to indicate the tuning condition there
of.
In the present example, the tuning device
is the variable capacity device or condenser ||.
The rotary elements of the condenser are oper
ated through the condenser shaft 34, and in the
present example the shaft extends toward the
radio panel I4, and has a dial hand or pointer 36
45 mounted thereon which plays over the dial face
bearing the tuning indicia visible through win
dow 24, as. the condenser is operated.
As before noted, with the elements 26 through
29 in the positions shown in Figs. 2 and 3, only
50 the tuning indicia and wave band indicator on
for a purpose later to appear.
The shouldered 25
portion of the bearing member is disposed out
wardly of one side of the bracket 2| and adjacent
the shouldered end of the dial supporting sleeve
39, as shown in Fig. 4. Formed by preference,
as an integral part of the bearing 48 and extend 30
ing through bracket 2|, is a tubular member or
cylinder 5|. The shaft 4| extends into the cyl
inder 5| and is provided with a head element 54,
the peripheral surface of which seats against the
internal wall surface of the cylinder, after the 35
manner of a piston. A compression spring 55 is
sleeved about the shaft 4|, and con?ned between
the shaft head 54 and an internally shouldered
part of the cylinder, thus serving to bias the sleeve
39 and dial elements thereon in a direction away 40
from the panel i4.
Mechanism of a preferred type now to be de
scribed, is provided for controlling both longi
tudinal shifting’ of the shaft 4| and hence of the
dial elements 26 through 29, and pivotal displace_ 45
.ment of the dial elements for the purpose here
tofore noted. The purpose for the longitudinal
shifting of the dial elements will appear as the
description proceeds.
,
cator on element 21, the element 26 is adapted in
a manner later appearing, tobe displaced suffi
tending substantially the length, yet terminating
ciently to permit visibility of the tuning indicator
element 27 through the slots 24 and 25. Like
wise, the element 2'! is displacyeable so as to ex
pose the tuning indicia and band indicator on
element 28, and similarly the element 28 is dis
placeable to expose the indicia on element 29.
Since in the present example, the element 29 is
the last of the group, it may be retained in its
original position and thus will be exposed only
when all the other elements have been displaced.
65 Hence, it will be readily observed. from the fore—
going, that at any given time, only one of the
elements 28 through 29 will be in. position for
exposure of its band indicator and tuningiindicia
through the windows 24 and 25.
70
The shaft or plunger 4| is journalled for lon
gitudinal sliding movement, in a bearing member
48 carried by and extending through a portion
of the bracket 2| heretofore noted, said bearing
member having an external, rounded shoulder 50
As shown in detail in Figs. 4 through 8, the 50
dial shifting mechanism comprises a substantial
ly channel-shaped frame 51 provided with a slot
58 in the bridge portion 59 thereof, the slot ex
element 26 .are visible through the slots 24 and
25. To expose the indicia and wave band indi
55
46 threadedly engaging the shaft 4|. To prevent
_ V
The dial elements 26, 21, and 28 are adapted
for sequential displacement, for the purpose above
noted, through mechanism now to, be'described.
Each of these elements is formedv with a lateral
extension 31 terminating in a projection or tail
75 piece 38.
The elements are pivotally supported
short of the ends of said bridge portion. The sides 55
6| of the frame 57 are substantially triangular
in side elevation, as shown in Fig. 4, the edge 62
of each side corresponding to the hypotenuse of
the triangle, serving as a camming edge for a
purpose presently to appear. In the assembly of 60
the frame to the dial mechanism, the shaft 4|
extends through the slot 58, while the solid por
tions of the bridge engage the shoulder 44 of the
dial carrying sleeve 39. The frame sides 6|
straddle the shaft and the camming edges 62 en 65
gage the rounded bearing shoulder 50, in the
manner shown in Fig. 4. From the foregoing, it
will be observed that the spring 55 acting on the
shaft 4 I, and hence on the sleeve 39 serves through
these elements to urge the camming edges 62 of 70
the frame against the shoulder 50.
As a means for attaining stability of the frame
51 in assembly and during its operation as will
be later described, and also, for con?ning the
frame to a linear movement of anyextent deter
75
2,114,540
mined by the length of the frame slot 58, there
is provided a shaft or plunger 64 spaced from
the shaft 4! and longitudinally slidably journalled
in a bearing member 65 secured to the bracket
2!, with the shaft extending through the frame
slot 58. The shaft 64 is urged in one direction of
its slidable movement by a spring 61 sleeved upon
the shaft and bearing against the shaft head 68.
The spring, shaft, and shaft head are arranged
3
ment only. In operating switch I 2 to change the
radio circuit connections, the switch shaft I3 is
rotated in steps, the angular extent of rotation
thereof in each step being determined by the
spacing of the switch contacts (not shown). Ac Cl
cordingly, the stepped movement of shaft [3 will
effect a corresponding stepped movement of the
frame 51, and the extent of linear movement of
integral part of the bearing member 65. Thread
edly engaging an internal bore in the outer end
the frame in each step is correlated with the ex
tent of rotary movement of shaft IS in each step 10
so as to attain the desired degree of shifting
movement of the dial elements. Such correlation
of shaft 64, is a rod ‘H provided for a purpose
later to appear, the rod having a. ?ange 12 seat
and relation of the elements above described, op
10 within a cylinder 18 which may be formed as an
15 ing against the end of shaft 54 and in engage
ment with the bridge portion 59 of the sliding
frame 51. The bearing member 65 extends out
wardly from bracket 2| a greater distance than
does the bearing member 48 heretofore described
20 in connection with shaft 41, and has its exposed
end 13 rounded as shown, to provide a bearing
seat for the camming edges 62 of frame 51. Thus
the frame is con?ned between the end 13 of bear
ing member 85 and the ?ange 12 on rod 1|, so
25 that the spring 6'! acting on the shaft 64 and
hence on the flange 12, tends to urge the camming
edges 62 of the frame against the bearing seat 13.
It will be observed from the foregoing descrip
tion and from an inspection of Fig. 4, that down
30 ward displacement of the frame 51 from its upper
extreme position shown in Fig. 4, will result in an
outward shifting of the plungers or shafts 4| and
64, against the pressure of the respective springs
55 and 6? acting thereon, this shifting of the
35 shafts being e?ected by reason of the wedging
action of the frame 51 on the said shafts. The
provision for the shifting of the shafts, particu
larly shaft it i , is made for the purpose of displac
ing the assembly of dial elements so that the
40 particular element being disclosed will be close to
the window 24 in. panel M. By regulating the
actuation of frame 51 to attain a step-by-step
movement thereof, the shifting of the dial ele
ments may be controlled so that say upon the dis
45 placement of dial element 26, the dial element 21
will be shifted into substantially the spacial posi
tion formerly occupied by element 26. Further
downward movement of the frame 57 during dis
placement of the element 21, will bring the ele
50 ment 28 into the space formerly occupied by ele
ment 21, and so for the last element 29. Thus
successive movements of the frame in steps, will
attain the desired shifting of the elements, and
it is to be noted that the results above described
55 will occur in reverse order upon successive up
ward movements of the frame 51.
Actuation of the frame in a step-by-step man
ner, is attained through the operation of the cir
cuit changing switch l2 through the control shaft
60 l3. For this purpose, the lower end of the frame
51 is provided with a laterally extending arm
having therein a slot 15, the longitudinal axis
‘which is substantially at a right angle to that
the frame slot 58. Extending through the slot
14
of
of
15
65 is an element or rod 76 having one end thereof
secured in any suitable manner, to an actuating
arm 19. The arm 19 is operatively secured to the
switch control shaft I 3 by a lock screw 82. Thus
by rotating the shaft I3, through the handle l5,
70 the frame El will be actuated through the arm
‘i9 and rod 16 in the slot 15 of the frame arm 14.
As will be readily understood, the purpose for
the slot 15 is to permit movement of the actuat
ing rod 16 therealong during rotation of the arm
19, since the frame 51 is con?ned to linear move
of movements is effected through proper design
eratively connecting the shaft l3 and frame 51. 15
Turning now to the mechanism for effecting
successive displacements of the several dial ele
ments, this is effected simultaneously with the
shifting of the dial elements by the frame 51,
through a member 86 secured
frame, as by the screws 81.
which may be a substantially
formed of any suitable rigid
to one arm of the 20
The member 86
rectangular plate
material, extends
outwardly and longitudinally of the frame, being
parallel to the arms of the frame, and is pro- -
vided with a central aperture or opening 88 of
triangular aspect. The marginal portion of the
plate aperture, de?ning a side corresponding to
the hypotenuse of the triangularly shaped open
ing 88, is stepped at 98, 5!, 92, and 93, as shown 3.0
in Fig. 6, with the lower ends of the stepped por
tions provided with an outturned lip or ?nger 94,
95, 96, and 91 respectively, as shown in Fig. 5.
The lips or fingers on plate 85 are provided for
effecting a pivotal displacement of the dial ele 35
ments, in a manner presently to be described.
Each of the dial elements is urged to its initial
position behind the member i8 and in register
with the windows 24 and 25 therein, by a spring
98 having one end secured to the dial extension 40
3'! and its opposite end secured to the rod ‘H on
shaft 64. Four such springs are Shown, one for
each of the dial elements 28 through 29, although
the spring for the last dial element 29 may be
omitted, if desired, as this element is normally .45
retained in its original position at all times. The
position of the dial elements behind the member
I8 so that the tuning indicia thereon will be in
register with the windows 24 and 25, is deter
mined by a suitable stop element 582 (Figs. 3
and 5) carried by the bracket 2 i. If desired, the
stop may be provided by one of the supporting
elements for the mask l8, such element being
comprised of a bolt !9 and sleeve 28 as hereto
fore noted. The stop is provided with an abut
55
ment I83 sleeved thereon, the abutment being
formed of any suitable material, such as alumi
num or bakelite. Moreover, securing the springs
98 to the rod H on shaft 64 serves to maintain
the axis of each spring in the plane of its dial 60
element during shifting of the dial elements by
the frame 51, as shaft til supporting the dial ele
ments, and shaft 64 supporting rod ‘H are moved
an equal distance upon each actuation of the
frame 51.
65
The arrangement of the plate 86 on frame 5'! is
such that with the plate and frame in the upper
most position, as shown in Fig. 4, the dial ele
ments will be disposed in their initial position
(Figs. 2 and 4) with the tail pieces 38 thereof 70
extending through the lower end of the opening
83 in plate 86 (Figs. 4 and 6). In this position
of the several dial elements, the tail piece 38 of
dial element 26 is disposed to underlie the actu
ating ?nger 94. The tail pieces 38 of the other 75
4
2,114,540
dial elements 21, 28', and 29 are in vertical regis
ter but out of engagement with the ?ngers 95,
96, and SH, respectively. Thus upon downward
movement of the frame 57 and plate 86, as ef
fected by actuation of shaft l3, the ?nger 94
will act upon the tail piece 38 of dial element 26,
to pivot the dial element upwardly and out
wardly from its initial position behind the win
dows 24 and 25, into the position indicated at
10 I05 in Fig. 5. In the displaced position I05 of
the element 25, the edge N26 or its extension 31
rests against the plate 85, and the element is
retained in such position against the bias of its
spring 98, by the ?nger M and surface portion of
15 the plate 86. Simultaneously with the displace
ment of dial element 25 and as a result of the
downward movement of the frame El’ as hereto
fore described, all the dial elements are shifted
toward the panel l4 so as to bring the next suc
20 ceeding dial element 2'6 into the space formerly
occupied by dial 265, in register with the windows
24 and 25. Successive downward movements of
the frame 51 and plate 86 effect in turn, similar
positioning of the other dial elements 21 and 28.
25 Actuation of shaft It so as to move frame El
and plate 86 upwardly, successively releases the
dial elements, in the reverse order of their dis
placement, permitting the springs 98 to return
At the
the elements to their original positions.
30 same time, the dial elements are shifted axially
of shaft :1! and in a direction away from the
from the vspirit and full scope of the invention,
as de?ned by the appended claims.
I claimi
1. A tuning dial mechanism of the character
described, comprising a plurality of dial elements
normally disposed in spaced relation, a member
pivotally supporting said dial elements, said
member being capable of axial movement to ef
fect axial displacement of said elements, and
10
means operatively associated with said dial ele
ments and with the supporting member therefor,
adapted for effecting concurrently, pivotal and
axial displacement of said dial elements.
2. A tuning dial mechanism of the character
described, comprising a plurality of dial plates 15
normally disposed in spaced, parallel relation,
a member pivotally supporting said plates, said
member being capable of axial shifting move
ment to e?ect axial displacement of said dial
plates, means operable to axially shift said sup 20
porting member and dial elements, and means
operated by said shifting means, adapted for
pivotally displacing said dial plates.
3. A tuning dial mechanism of the character
described, comprising dial elements normally dis- '
posed in spaced relation, means supporting said
elements for both pivotal and axial displace
ment, and means operatively associated with said
dial elements, adapted for effecting pivotal and
axial displacement of each of said dial elements. 30
ll. A tuning dial mechanism of the character
panel l4, under the action of the camming frame
described, comprising dial elements normally dis
51' and springs 55 and 51 acting respectively, on
shafts 4i and Ell, so as to return the dials to
posed in spaced, parallel relation, means sup
porting said elements for both pivotal and axial
displacement, and means operatively associated 35
with said dial elements and said supporting
35 their original position rearwardly of the panel.
From the foregoing, it will be observed that
the mechanism for positioning the tuning dial
elements is actuated and controlled by the cir
cult changing device for the radio, and the ar
40 rangement is such that upon actuation of the
circuit changing device to effect circuit connec
tions for reception on a particular wave band.
the tuning dial element corresponding to such
wave band will be disposed in register with the
45 windows 24 and 25 for visibility of the tuning
indicia on such dial. Thus, when the circuit
changing device is in position to effect reception
on the “Broadcast” band, this being one extreme
position of the device, the dial 26 which is the
50 “Broadcast” band dial, will be in position for
observance of its tuning indicia through window
24 and band indicator “Broadcast” through win
dow 25. When the switch i2 is actuated by shaft
l3, through one step to the next succeeding posi
55
tion determining a different circuit connection
for reception on another wave band, dial 2? cor
responding to such wave band, will be in position
for observance of its tuning indicia through win
60 dow 24 and its band indicator through window
25, and similarly for the remaining dial elements.
Thus, the present invention provides a tuning
indicator
mechanism
for
a multi-wave-band
radio, the indicator being characterized by the
65 selective display of tuning indicia for but one
wave band at a time. Moreover, the display of
tuning indicia corresponding to a given. wave
band is made coincidentally with the actuation
of the circuit changing device of the radio, to
70 effect the circuit connections for reception on
the given wave band.
It is to be understood that the invention is
not to be limited to the herein described embodi
ment thereof, but that alterations and modi?ca
75 tions may be made therein without departing
means, adapted for effecting, coincidentally, piv
otal and axial displacement of each of said dial
elements.
5. In combination with radio apparatus in 40
cluding a tuning device, a panel and an opening
in said panel, a tuning dial mechanism compris
ing dial plates arranged in spaced, parallel rela
tion, means supporting said plates for both piv
otal and axial displacement, means biasing said 45
plates to a position in register with said panel
opening, and means operatively associated with
said dial plates, adapted for effecting a coinci
dental pivotal and axial displacement of each
of said dial plates out of register with said panel
opening.
50
6. In combination with radio apparatus in
cluding a tuning device, a circuit changing de
vice, a panel and an opening in said panel, a
tuning‘ dial mechanism comprising dial elements
arranged in spaced, parallel relation, means sup
porting said elements for both pivotal and axial
displacement, means biasing said elements to a
position in register with said panel opening, and
means operatively associated with said dial ele
ments and actuated by said circuit changing de 60
vice, for effecting sequential displacement of said
dial elements out of register with said panel open
ing and coincidentally therewith, axial displace
ment of said elements.
7. In combination with radio apparatus in 65
cluding a tuning device and a circuit control de
vice, a tuning dial mechanism comprising dial
plates arranged in spaced, parallel relation,
means supporting said elements for both pivotal
and axial displacement, a camming member op
eratively associated with said suppporting means,
adapted for effecting axial displacement of said
dial plates, actuating mechanism for said cam
ming means, operated from said circuit control
2,114,540
device, and means on said camming member,
adapted coincidentally with the actuation of said
camming member, to effect pivotal displacement
of said dial plates.
8. In combination with radio apparatus in
cluding a tuning device, a circuit control device,
a panel and an opening in said panel, a tuning
dial mechanism comprising dial elements ar
ranged in spaced, parallel relation, means sup
10 porting said elements for both pivotal and axial
displacement, means for biasing said dial ele
ments to a position in register with said panel
opening, a camming member opera'tively as
sociated with said supporting means, adapted for
effecting axial displacement of said dial elements,
actuating mechanism for said camming means‘,
operated from said circuit control device, and
5
said dial elements for axial displacement there
of, said cam being actuated by said circuit con
trol device, and a member movable with said cam
and provided with spaced projections thereon ar
ranged for engagement with said dial elements as
the cam is operated, to effect pivotal displace
ment of said dial elements.
1
11. In combination with radio apparatus in
cluding a tuning device, a tuning dial mechanism
therefor, comprising dial elements arranged in 10
spaced relation, a projection on each of said ele
ments, means supporting said elements for both
pivotal and axial displacement, a cam operative
ly associated with said dial elements for axial
displacement thereof, and a member movable
with said cam and provided with spaced pro
jections arranged for successive engagement with
means on said camming member, adapted co
the projections on said dial elements as the cam
incidentally with the actuation of said camming
member, to effect pivotal displacement of said
dial elements out of register with said panel
opening.
is operated, to effect a successive pivotal displace
ment of said dial elements.
12. In combination with radio apparatus in
cluding a switch for adjusting the apparatus to
9. In combination with radio apparatus in
cluding a tuning device, a tuning dial mechanism
bands, a control for said switch, a plurality of
therefor, comprising dial elements arranged in
spaced relation, means supporting said elements
nals in one of said wave bands, a panel for
for both pivotal and axial displacement, a cam
operatively associated with said dial elements
for axial displacement thereof, and a member
30 movable with said cam and provided with spaced
projections arranged for engagement with said
dial elements as the cam is operated, to effect
pivotal displacement of said dial elements.
10. In combination with radio apparatus in
cluding a tuning device and a circuit control de
vice, a tuning dial mechanism comprising dial
elements arranged in spaced relation, means sup
porting said elements for both pivotal and axial
displacement, a cam operatively associated with
receive signals in any of a plurality of wave
dial plates, each bearing tuning indicia for sig
concealing said plates, having an opening for re
vealing the tuning indicia of any one thereof at a
particular time, a shaft, means mounting said
dial plates for independent pivotal movement and 30
conjoint translatory movement on said shaft, to
Ward and from said panel opening, means for
moving the dial plates as aforesaid, means opera
tively interconnecting said switch control and
said dial moving means, and a manipulating ele 35
ment for effecting joint actuation of said. switch
control and dial moving means.
VERNON C. MACNABB.
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 002 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа