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Патент USA US2127590

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Aug. 23, 1938.,
Filed Dec. 21, 1936
Aug. 23, 1938.
Filed Dec. 21, 1936
2 Sheets-Sheet 2
Patented Aug.’ 23, 1938 .
Joseph Erwood, Chicago, Ill., assignor, by mesne I
assignments, to Electra-Acoustic Products 00., >
Fort Wayne, Ind.,- a corporation of Illinois
Application December 21, 1936, Serial No. 116,977
4 Claims. (Cl. 885-282)
This invention which relates to an apparatus
for the projection of sound and images is con
entire cabinet may be lifted up and be con
veniently carried about.
The lid, as, shown, is connected at one end
cerned primarily with a portable cabinet inwhich
the operating units are contained. The apparatus flange by a pair of hinges 20 to the front wall of
5 in its entirety is designed to be carried around‘ the cabinet. When fully open the lid will have 5'
and set up in various. places, and, consequently, swung through 180“ at which point its end ?ange
is small, light, and easily set up for operation.
With these objects in mind, the present improve
ments are directed to a cabinet containing a
10 sound apparatus, a picture projector, avscreen on
which images may be thrown, and means for
to which the hinges are attached will abut the
front Wall I | .of the cabinet (see Fig. 3‘) . In addi
tion, the opposite end wall and one of the side
?anges of the lid each carries a pair of plate-lugs 10
2| adapted to enter socketed ?xtures 22 on the
. framing-and advancing a ?lm'through the pro
corresponding walls of the cabinet. Associated
jector so that successive images may be exhibited , with each such ?xture is a spring yoke 23 adapted
upon the screen. In the accomplishment of these
15 purposes I have provided an apparatus which is
inexpensive, simple to produce and use, and also
convenient to carry around'and stow away.
to swing over the proximate lug whereby to se
' a cure the lid in closed position.
' The side wall I2 is detachably secured to the
cabinet bottom 25' as by a pair of leaves 26
secured to the wall adjacent its lower edge, each
shown in ,the accompanying drawings, Figure 1 . leaf being formed with a hook 2'! adapted to en-4
In the embodiment of this invention which is
20 is a view in perspective of the cabinet;
gage a pin 28 which is supported’ between a pair 201
Fig. 2 is a perspective view of the cabinet with
one side wall dropped down and the lid partially
of joints 29 carried by va plate which is atlixed to
opened, showing the parts in the interior of the
cabinet as they'are arranged for storage there
connection is provided'permitting the side wall .
tion where it may then disengage from the pins. 25 -
Fig. 3-is a view in perspective of the cabinet
opened up with ‘the several units arranged in
operative position;
the cabinet bottom.
In this manner a hinged '
l2 to be swung downwardly to .a horizontal posi
In its up position, as illustrated'in Fig. 1, these
hinged connections are inseparable.
Within a cabinet ofv this construction I pro
Fig. 4 is a perspective sectional view of -the
vide a supporting partition 35‘parallel' to the side
' 30 sound reproducer pick-up arm within its folding , wall l2 ‘but spaced therefrom’ to ‘form therewith 30
an enclosure for the‘ accommodation of a turn
Fig. '5 is a fragmentary detail on an enlarged
scale of the mounting within’ the cabinet for the
projector supporting‘arm;
35 ' Fig. 6 is an enlarged detail in section taken on
Fig. 7 is a vertical vsection through the forward
end of the projector showing the ?lm gate and
feeding spool together with a slide ?lm in, opera
40 tive position;
Fig. 8 is a detail insection on line 8-8 of
> Fig.
Fig.9 is a sectional view on line 9—-9 of Fig. 8;
table T and a projector P.‘ As shown, the. turn
table is of a diameter which extends nearly the ,
entire distance between the ‘cabinet front and
rear walls and upwardly through a recess to a 35
point beyond its top wall. l4 and into the space
below. the enclosing lid. The turntable is held in:
place upon a pair of clips 36 which are a?ixed
to the partition 35. Formed in this partition is
an opening 31 which, may be covered with a 40
screen or other foraminous sheet for the emis
sion therethrough of sound which emanates from
a loud speaker which is'mounted upon the rear
'face of the partition. As part of the’ sound appa
Fig. 10 is a view similar_to Fig. 9 showing the , ratus I employ a motor driven 'spindle'v38 (see ' 2) projecting through the cabinet topin a
framing mechanism adjustedyto another position. .Fig.
position to receive thereon the turntable when
. The cabinet herein illustrated is in the general mounted as shown in Fig. 3. A reproducer pick
form of. a suitcase C having'one side wall (not
._ up arm '39 of channel formation is swingably
a narrow front wall II, a, second side mounted -upon' a post 40 carried on the cabinet 50
wall 12 which is removable, and a rear wall 13. .-top and provided at its free end with the usual
Over the top of the cabinet is ?tted another wall ' needle for tracking in the grooves of a record
in‘ theform of a ‘lid L with depending ?anges which may be positioned upon the turntable.
' providing an ‘enclosure over the cabinet'top wall When the turntable is taken. oil‘ for vertical
“- I4. ‘A handle I5 is secured to'the lid, whereby the
positioning as shown in Fig. 2, one wall of the 55
pick-up arm adjacentits free end may then be
a‘ frictional driving connection therewith. _‘At
supported within a spring clip 4| having a pivotal ‘one point the circular ?ange upon thedriving
mounting 42 upon a bracket 43 which is a?ixed
' r to the cabinet top.
At the time the turntable is
set up for rotation, the clip is swung down to the
dotted line position shown in Fig. 4 so as to clear
" both the pick-upvarm and the turntable.
The projector P comprises a lamp housing in
whose forward wall 5| is supported arlens 52 in
adjacent but spaced relation'to a second lens 53
which is carried in a swinging ?lm gate 54. Be
tween the two lens a slide ?lm F is adapted to be
advanced so as to expose to light rays passing
wheel is interrupted to accommodate a pawl 86
‘pivoted at 81 to present its acting end against the
periphery of the ratchet disk which, as shown, is
‘provided with four teeth spaced 90° apart. Se
cured to the pawl at 88 is one end of a ?exible
cord 89 which passes over the back of the pawl,
then around an extended portion of the circular
flange of the driving wheel, and thence to a point 10
convenient to an operator for manipulation. Each
pull of the cord sufficient to rotate the driving
wheel a quarter turn produces a like- movement
throughthe lens the images which are’ to be ' of the‘ ratchet disk and, in consequence, the shaft,
whereby the- spool advances the ?lm a distance 15
15 successively displayed upon the screen S. In the
construction shown, this screen is carried upon equal to one exposure. A stop whereby to limit
the rear face of the side wall 12. Adjacent one‘ oscillations of the driving wheel to a prescribed
range is provided by a tongue 9!! extended out
edge of the side wall is a hook 55 (see Fig. 6) en
gageable with a pin 56 supported between ‘aligned wardlyfromone wall of the housing to lie within
an arcuate slot 9i whose ‘length may be just
20 joints 51 which are extended from one end of a
. ‘25.
plate 58 that is affixed to the inner face of the end
slightly more than 90". At the conclusion of each
?ange of the lid. By this construction the side
wall 12 may be hooked onto the lid, when the
latter is in‘ inverted position, (see Fig. 3) thereby
to be supported vertically for the reception upon
advance of the driving wheel, release of the pull
ing cord will permit a spring 92 to return the
the screen of images thrown from the projector.
To assist in this support I have provided upon the
rotated in a direction counter to operating move
exterior face of the side wall 1,2 (as viewed in Fig.
- i) a socketed ?xture Gll having an associated
30 spring yoke Bl adapted to receive and lock with
one of the plate-lugs 2| which is'carried on an end
?ange of the lid.
The partition wall 35 whichcarries'a speaker
Wheel to initial position.
Toframe the ?lm the control disk is’ manually
ments of the pawl ‘drive. By such rotation of the
control disk. the shaft is ‘turned against the fric
tion imparted by its end against the ratchet disk'
in response to tension of the spring washer 13 at 30
the opposite shaft end. The net result of this
operation is to readjust the'position of the shaft
‘(and ?lm) relative to the ratchet disk.
The projector has a swivel mounting upon one
cabinet for mounting at a remote point (see the end of an arm I00 at whose other end is affixed a 35
dotand dash‘ line showing in, Fig. 3), .in which -' plate IDI. Opposite edges of this plate are adapt
ed to be ?tted within offset facing ?anges I02,
event it remains connected by an electrical con
ductor to suitable apparatus (not shown) in ‘the one pair of mounted upon a block “)3
‘ upon its rear face may also be detached from the
cabinet. By this optional arrangement, the im
40 ages may be thrown onto the screen when the
latter is supported either upon the cabinet lid or
at a'more remote point.
Arranged transversely~ within theprojector is
within the cabinet. The projector may accord
ingly be fitted within the cabinet, in the manner 40
shown in Figs.v2-and 5, where it is supported by
the sliding ?t of the plate IUI between the offset
?anges which vfurnish a mounting therefor. A
a spool comprising a hub 65 to the opposite ends
of ‘which are a?ixed sprocket wheels 66 adapted
similar mounting is provided upon the exterior
. to engage within the usual rows'of perforations
a pair of ‘facing oil’set ?anges I01 adapted to
overlie opposite edges of the same plate IOI. Upon
adjacent opposite edges of the ?lm F. A brake in
- the form of a leaf spring 61 extends from one wall
of ' the housing to engage with the proximate
v50 sprocket wheel.
For advancing and framing the ?lm, the spool
is ?tted with a set screw 68 which‘, when ad
vanced, bears tightly against a sleeve 69 on which
the spool is‘ mounted. The .slee've- surrounds a
shaft 10_ which extends through bearings formed
in opposite walls of the housing. One shaft end
‘II which is reduced in'diameter is. threaded to
receive a nut 12 bearing against a spring washer
"I3 which abuts the proximate sleeveend. Upon
60 the opposite shaft end, exteriorly of the' housing,
of the cabinet in a plate I06 from which extends
such an exterior mounting the arm may be read
ily ?tted with the’ projector lying out beyond the
proximate end of the cabinet in a position to 50
throw images upon the screen which, when
mounted on the ~free end of the lid L, is situated
beyond the opposite cabinet end a distance sub-,
stantially equal to twice the cabinet length. It
will be noted, therefore, that although the cabinet 55
is small, the operating parts may be accommo
dated-completely therewithin, yet when removed
therefrom, will furnish mountings exteriorly
thereof such that the distance between the pro
jector and screen is substantially twice the long
is fitted the hub 15 of a driving wheel 16 having est dimension ofthe cabinet.
I claim:
a circular ?ange 11 near its periphery; a ratchet
1. A projector apparatus comprising anelon
disk 18; a thin washer-‘I9 of ?bre or other appro
priate material; and a control disk 8ll-all in the gated portable cabinet, a lid on said cabinet, hinge
order named. The control disk is slightly recessed ' means on the‘ lid and connected to one endof‘
vupon its'inner face to partly receive the washer, the cabinet and adapted to carry the lid through
180° to an open position where its-free end lies’
ratchet disk and circular'?ange, whereby this as
sembly of operating parts will occupy but a short twice the cabinet length from its closed position,
means for supporting the lid in such open posi
' space upon the shaft end.
The mounting'of the control disk upon the shaft tion, a projector, means for mounting the pro-.
is fast, whereas that of the ratchet disk is loos_e.~v ject'or in one position within the cabinet and in
another position exteriorly thereof 'at a point ad
cross‘pin 85 whose ends lie within slots extending jacent the cabinet end opposite that whereon the
- The sleeve is drivingly secured to the shaft as by a
longitudinally of the sleeve adjacent one end lid is hinged, a screen and means for mounting
75 thereof which abuts the ratchet disk to establish ' the screen in one position_ within the cabinet and 75
cabinet sidewall upon the‘ lid, when in open po
sition. adjacent its free end, one face of_ the
in another position upon the lidadjacent its free
end whereby to lieremote from the projector a
distance substantially twice the long dimension of
side wall being adapted to serve as a screen,-a "
the cabinet.
projector, means for mounting the projector in,
2. A projector apparatus comprising an elon
one position within the cabinet and inv another 5
gated portable cabine't having a removable side position exteriorly thereon at a point adjacent
wall, a‘lid on said cabinet, hinge means on they the cabinet end opposite that whereon the lid is
hinged whereby to throw images upon the screen.
lid and connected to one end of the cabinet where
by to swing the lid through 180° to an open po- _ 4. A projector apparatus comprising a'portable
10 sition where its free end lies twice the cabinet carrying case having‘ a cover hinged along a top 10'
edge thereof and swingable outward ‘to a hori
length from its closed position, means for sup
porting the lid in such open position, a projector, zontal position at one side of the carrying case,
means, for~mounting the projector in one posi'
tion within the cabinet, and in another position
15 exteriorly thereof at a. point adjacent the cabinet
end opposite that whereon the lid is hinged, and
means for mounting the cabinet side wall upon
the lid end remote from the projector to serve
‘ as a screen therefor.
3. A projector apparatus comprising an elon
gated portable cabinet having a removable side
a picture projector mounting means upon said
carrying case opposite thewall upon which said ‘
cover is hinged, a picture projecting lantern
adapted when mounted upon said mounting
means to project a picture in the'direction of
said cover when said cover is in its‘fully opened
position, a picture ‘screen forming portion car
ried by said carrying case independently of said 20'
cover when the carrying case is closed, and means
wall, a lid on said cabinet, hinge means on the . for securing said screen forming portion in a ver-'
lid and connected to one end of the cabinet said tical position upon said cov'erat aidistance from -
the projector greater than the largest dimension
wall in place, the lid being adapted to swing of said carrying case and in optical alignment
lidhaving means to secure the removable side
through 180° to an open position where its free
'end lies twice the cabinet length from its closed
position, means for- supporting the removable
with said‘ projector when said cover is fully opened
and the apparatus is in operation,
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