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NOV,- 16,
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Filed May 23,‘ 1945
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Feé ‘ts-Mm,
Patented Nov. 16, 1948
Fred H. Barger, Dayton, Ohio
Application May 23, 1945, Serial No. 595,460
2 Claims. (01. 192—48)
This invention relates to control mechanism
and especially to switchboard, dashboard or panel
controls of the type having a control knob, handle
mechanism is arranged‘behind a board 5 pro
‘ vided with a hole 1 through which the control
knob 8 only projects. This knob, as shown in
wheel or lever which is capable of selectively op
Figure 2, is, therefore, the sole member which is
erating at least two different power or motion 5 seen and accessible from the outside or front of
transmission mechanisms. The invention has for
the board.
its general object to provide a simple and ef?cient
Associated with the knob 8 is the central cou
mechanism in which the selective adjustment is
pling member 9 which is loosely mounted on a
performed by a small axial displacement of the
shaft I0, journalled in a support [I at I2 and [3.
control knob, wheel, handle or lever.
The shaft may be provided with collars M for
The invention essentially consists in a rocking
holding it against axial displacement.
or rotating central member associated with the
Said shaft It may carry ‘the pulley or disk 15
control knob, handle or lever, capable of axial
for one ‘of u the two transmissions of power or
movement and provided with two coupling or
. motion to be serviced by the dual control mech
clutch mechanisms, positively engaging and re
leasing, respectively, other axially ?xed rocking
or rotating members connected or coupled with
the transmission of power or motion to be selected
when moved axially in either direction. The cen
ceiver the pulley l5 may drive the usual cord,
belt or spiral spring cord operating the volume
tral knob or handle operated member, according
to the preferred embodiment ‘of the invention
may be held permanently in a position in which
it is in operative or coupling engagement with
one of the cooperating axially ?xed members by
For instance, if associated with a radio re
control, the back feed control, the potentiometer
or condenser to be operated selectively.
The pulley i5 in the example shown is ?xedly
connected with the shaft by means of its hub
portion» l6 through which a screw H is passing.
The second‘transmission to be coupled selec
means of a spring; in such a case when the knob, 25 tively with the member 9 and knob 8 is loosely
handle or lever is operated without axial pres
mounted on shaft Ill and is represented in the
sure, one of the transmissions of motion or power
example shown by the spur wheel In; it is, how
is selected automatically while application of
ever, to be understood that this showing is arbi
pressure during rotational or rocking movement
trary and that any other transmitting means
30 such as a pulley, disk or the like may be mounted
causes selection of the other transmission.
in its place, as speci?c conditions may require.
The'invention is more speci?cally described in
the following detailed speci?cation and illus
The selective coupling of the two members l5
tated in the accompanying drawing showing one .
and I 8 with the knob 8 is obtained by means
of the member. 9, which is mounted loosely on
modi?cation thereof. It is, however, to be un
derstood that the fact that only one preferred 35 shaft l0 and is capable of axial displacement.
This member 9 (Figures 1 and 4) is provided
embodiment of the invention is described is not
to be understood in a limitative sense. This
with two recesses I9, 20 which constitute female
modi?cation is clearly described in terms sug
members provided with teeth as shown in Fig
gesting further modi?cations to the expert skilled
ure 4 or simply of polygonal or square shape. The ‘
in this art and such further modi?cations, as 40 female member 9 cooperates with a male member
far as coming within the ambit of the annexed
2| of corresponding shape (Figure 5) formed by
a toothed wheel or polygonal or square disk,
claims, are, therefore, not to be considered as
departures from the invention.
which is ?xed on shaft [0 by means of screw 22.
In the drawing:
The member 9 is urged toward the member
Figure 1 is an elevational partly sectional view 45 21 by a spring 23, which ?nds its support on
of an arrangement embodying the invention.
the toothed wheel I8. The female part 20 of
Figure 2 is an elevational front view of the
member 9 cooperates with a male member 24
panel and knob.
projecting from the hub portion 25 of toothed
Figures 3, 4 and 5 are views of details con
wheel l8. The male member 24 is held out of
50 engagement with female-member 20 by spring 23.
nected with the coupling,
It has been assumed that the selective dual
It will be clear from the above description that
control, as illustrated in the drawing, is applied
if knob 8 is turned without applying any axial
to a radio receiver or transmitter, to the dash
pressure to it, the knob will turn member 9 and
board of a car or airplane or to any other control
‘by means of female portion I9 and male portion
board of some kind, and that, therefore, the 55 2| ?xed on shaft III, the latter will be turned
panel, a coupling member ?xed on the shaft por
with the knob. The movement of the shaft will
result in rotation of pulley l5 and in the actua
tion of the instrument or element operated there
by. It will also be clear that male portion 24
projecting from hub 25 of Wheel 18 is not affected
by this rotation of knob 8 but remains at rest.
tion projecting through the said panel, a motion
transmitting member ?xed on said shaft and
another motion transmitting member loosely
mounted on said shaft, both arranged behind the
panel, the latter member being arranged at a
If knob 8 is rotated with axial pressure applied
to it, the member 8 will be moved axially on
distance from said coupling member, a hand
operated control knob and an axially movable
member connected with it, the former being ar
shaft 10, the spring 23 will be compressed, the
female portion it! will be disengaged from male
ranged in front of the panel and both being
slidably arranged on the projecting portion of
portion 2i and the female portion 20 will engage
the shaft, said axially movable member being
male portion of disk 24. Therefore, the shaft
moreover located between the two aforesaid
it] wil remain at rest, while wheel [8 is turned.
motion transmitting members, female coupling
It is quite obvious that the constructive de
tails shOWn in the drawings may be changed and 15 members arranged in recesses, formed on both
sides of said axially movable member, male
have to be changed in accordance with the
coupling members adapted to enter said female
special constructive purposes to be accomplished,
coupling members alternatively upon movement
but that this does not involve any change of a
of the axially movable member, arranged on said
basic nature.
I claim:
20 coupling member and on said loosely mounted
motion transmission member respectively, and
l. A selective control mechanism for operating
a compression spring between said loosely
a plurality of motion transmitting members
mounted motion transmission member and said
mounted behind a panel selectively by means of a
axially movable member holding the female
single control member arranged in front of the
panel, comprising a shaft mounted behind the 25 coupling part of said axially movable member
out of engagement with the male member of the
panel provided with a portion projecting through
loosely mounted motion transmission member
the panel, motion transmitting members on said
and the' female member on the slidable and
shaft, one of said members being mounted ?xedly
axially movable member in engagement with the
and one of said members being mounted loosely
male member associated with the ?xedly mount
on said shaft, a coupling member ?xed on the
ed coupling member.
shaft portion projecting through said panel, an
axially shiftable control member and a hand
operated knob associated with the same loosely
mounted on the portion of the shaft projecting
through the panel between the aforementioned 35 The following references are of record in the
coupling member and the loosely mounted motion
?le of this patent:
transmission member, means for effecting a rota
tional coupling formed on each side of said axially
movable member and coupling means engageable
therewith on said ?xed coupling member and on 40
said loosely mounted transmission member.
2. A selective control mechanism for operating
a plurality of motion transmitting members
mounted behind a panel selectively by means of
a single control member arranged in front of the
panel, comprising a shaft mounted behind the
panel, having a portion projecting through said
Walker __________ __ Mar. 2, 1897
Archer __________ __ Nov. 30, 1920
France __________ __ Sept. 27, 191-5
Great Britain ____ __ Sept. ‘6, 1938
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