US2330036A - Coin controlled movie-sound machine - Google Patents

Coin controlled movie-sound machine Download PDF

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US2330036A
US2330036A US460087A US46008742A US2330036A US 2330036 A US2330036 A US 2330036A US 460087 A US460087 A US 460087A US 46008742 A US46008742 A US 46008742A US 2330036 A US2330036 A US 2330036A
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motor
phonograph
switch
selector
movie
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US460087A
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John F Eakins
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PHONOVISION Corp
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PHONOVISION CORP
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    • GPHYSICS
    • G07CHECKING-DEVICES
    • G07FCOIN-FREED OR LIKE APPARATUS
    • G07F17/00Coin-freed apparatus for hiring articles; Coin-freed facilities or services
    • G07F17/16Coin-freed apparatus for hiring articles; Coin-freed facilities or services for devices exhibiting advertisements, announcements, pictures or the like
    • G07F17/163Coin-freed apparatus for hiring articles; Coin-freed facilities or services for devices exhibiting advertisements, announcements, pictures or the like for film projection apparatus

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  • This invention relates to coin controlled moviesound machines and has ior one ofitsprincipal objects to provide an improved, simple machine, whereby sound may be reproduced from records in-synchronism with a projected movie. film.
  • a further object of the invention is to provide an improved movie projector system which can readily be adapted for addition to selective automatic phonographs to provide a visual accompaniment tor the sound reproduction.
  • One-oi the objects of the invention is to pro-- vide an improved connecting system whereby the sound film starts to operate when the needle is at definite position on the sound groove.
  • a further object of the invention isto provide tudinal rows oi pictures, each row constituting a separate film episode. r a
  • Selector means are provided for bringing one row oi pictures constituting one film episode'into alignment with the projector and meansareprovided whereby the film selector is controlled by the. selector oi'the' phonograph. Since in that particular phonographthe selector moves con- L tinuously in one direction, the sound records are selected-inthewder 1, 2,3 9, 10, 1,3,3,- etc. Since the longitudinal rows 01 pictures on film must be moved backward and forward,
  • Anotherobject. of the invention is to provide a correlated selector system for the sound.
  • Fig. l is a diagrammaticview oi the mechanism of the present invention,- including the principal wiring circuit;.
  • Pig. 2 is a wiring diagram of the selector and coin control means whereby the controlling pins "of Fig. 1-are actuated into selecting positions;
  • Fig. 3 is a sectional view, showing the moving machine located inside a cabinet.
  • the reierence numeral I designates a transformerwhich is connected to the power lines III and H.
  • Fig. 2 discloses selector means whereby any desired number or pins I! corresponding toany desired selections may be paid iorand'the pins selected or projected.
  • Arotary shaft 48 driven bytheselectoroitheoithe phonograph carries an abutment 6 l which is adapted to engage any one of the selected pins 62 so as to terminate the motion of the shaft 43, the position of which shaft determines which phonograph record will be played.
  • the solenoid 63 is carried by the shaft 43 so as to be brought into alignment'with the arresting pin 62 and when the solenoid 63 is energized, the arresting pin 62 is returned to its normal position.
  • the switch 225 is arranged to close momentarily .just before the selected record is moved out toother side of the winding 3
  • opens and no pin 62 is in projected condition the graph motor ceases to operate.
  • I provide a normally open switch l2 adjacent the switch 4
  • One side 01 the switch I2 is connected to the power line Ill.
  • the other side is connected to a relay.
  • I3 which is arranged, when energized, to opena switch in the circuit of the motor relay 91.
  • the other. side of the relay I3 is connected to one pole or leaf of a switch l5 ota lockup relay l6.
  • which is'connected by means 'of a chain 22 to a sprocket wheel 23.
  • the shaft of. the sprocket wheel 23 carries a radial arm 24 which carries at 68, each of which corresponds to one particular its outer end a conductive pin 25.
  • the sprockets II and 23 are of the same size so'that the'pin 25 attains a definite position for each selecting position of the shaft 43.
  • I break one of the lines connecting the amplifier 2l6 to the voice coil of the loud speaker 223 and connect two lines 26 and 21 to the open ends. Across these two lines I connect a switch 263m a lockup relay 29 and in parallel with the switch 28 I connect the unlocking winding 36 of the lockup'relay 23. V
  • main winding of the lockup relay Hi The other side of this main winding is connected to the unlocking winding 32 of the lockup relay l6.
  • the other side of (the winding 32 is connected to a contact 33'which bears against the film 34 of the movie projector.
  • the other side of the film I provide a contact 35 which is connected to the power line Hi.
  • the film is provided'with an opening 36 which registers with the contacts 33 and 35 at the end of a projection of a film episode so that momentary engagement is established between the contacts 63 and 35, releasing the relay is, locking up the relay l6 and locking up the relay 29.
  • the momentum of the projector is suflicient to move the opening 36 clear of the contacts 33 and 35 so that the circuit is broken almost immediately.
  • I provide in the cabinet'means for receiving from patrons coins of various denominations.
  • I provide a coin chute 53, which may be intended for the reception of a dime.
  • a dime falling through this coin chute momentarily closes a switch 56, which is in circuit with an electromagnet 55 located adjacent a ratchet wheel 56.
  • the armature 51 of the mag- -net 55 carries a dog 56 adapted to move the ratchet wheel 56 one tooth from its normal posi-- tion.
  • a pin 59 carried by the ratchet wheel holds open a switch 66; but when the ratchet wheel is moved one or more tooth spaces from its normal position, this switch becomes closed.
  • a similar pin 64 'on the other side of the ratchet wheel is arranged in normal switch 65 is closed.
  • I mayprovide another coin chute66 for the reception of a fifty cent piece, and in the fifty cent piece coin chute I may provide five switches 61, all of which are connected to operate the magnet.55 so that the ratchet wheel 56 is displaced after pointed out, selections can be made only when. the switch 66 is closed, and each selection eflects return of the ratchet wheel 56 one tooth space towards its normal position.
  • the magazine switchconstituted by the ratchet wheel 56 and the switch 66 limits the number of selections which can be made, since, as .herein- Q normal position.
  • Solenoids 15 are arranged around the individual selector pins 52, the arrangement being such that when one of the solenoids I is energized, the corresponding pin' 92 is projected into the path of the arm II.
  • the button 68 also carries a movable contact I6, which is adapted to establish a circuit between two associated contacts 11 and III. It is arranged so that this last-named circuit is established not later than the instant the contact I0 engages the contact I4, since the establishment of this circuit discharges credit from the ratchet wheel 56; All
  • the contact I0 of the button 09 glass upon which the picture is projected.
  • Light On the other side ofelectromagnet an it is-connected to one side of a magnet 91, which is in turn. connected to the other power line I0 through switch 50.
  • the electromagnet SI is similar to the electromagnet 55, but it is arranged so that it feeds the ratchet wheel 55 one tooth in the opposite direction, that is, towards its normal position, each time that the magnet 9
  • the electromagnet 90 is associated with a ratchetwheel 92 so that on each energization the ratchet wheel 82 is moved one step from its initial or normal position.
  • the ratchet wheel 92 carries a pin-94, which controls a switch 95. In the normal position of the. ratchet wheel 92 this switch is open, and in all other positions it is closed.
  • the switch 85 is arranged inparallelwith the switch 55, both beingconnected to th'epower line II.
  • the other sides of the switches 95 and 95 are connected to the lamp projector. illuminated at all times during which either of the ratchet wheels 55 or 52 is displaced from their turned to their normal position, the lamp is-disconnected from the power supply.
  • the projector mechanism may be substantially identical with that described in my copending application Serial No. 460,080 referred to above.
  • the film 94 is wide enough for ten frames 89, and each episode consists 'of one longitudinal series of frames.
  • the frames may be about one-third of an inch wide; and in view of the relatively large size of film necessary.
  • the mechanism is contained within cabinet 89, as shown in Fig. 8, which cabinet is provided with a transparent screen 90 suitably of frosted from the lantern 9
  • a suitable lens structure 94 is provided on the outer side of the film 34 from the lantern 9
  • the film I4 is continuous; its ends being cemented together so as to constitute a relatively large loop.
  • the excess film may be stored in any suitable manner. For example, it may be arranged on sprocket wheels 95 located'behind the lantern 9I so that the major part of the film is located in vertical lengths in the manner shown in Fig. 3.
  • the film is fed from the sprockets 95 by means of feed sprockets 96 and cooperating rollers I09 ,the phonograph motor are preferably synchro- Consequently, the lamp is obviously motors so that the visual and tonal reproductions are maintained in synchronism.
  • the lower sprocket 99 is driven by a shaft I03.
  • the shaft I09 carries a worm I04, which meshes with the worm gear I05 rigidly mounted on the shaft carrying the sprocket 96.
  • a worm I05 which drives a worm gear I01 rigidly mounted on a shaft I08, which extends through a claw housing'I09 rigidly mounted on the structure 40, which carries the frame 45.
  • the housing I09 car'ries three claws IIO, which are arranged to enter the sprocket holes 81, 98 and effect the normal step by step movement of the film in be of any known or suitable type; and since many such mechanisms are in ordinary use in movie projectors, it is unnecessary to describe the same in detail.
  • the shaft I03 is driven by a worm III, which meshes with the worm gear I I2, which is carried by the structure 49.
  • the worm gear H2 is slidably mounted on a gear shaft I I9, which extends from the gear reduction housing I02. The arrangement is such that the worm gear I I2 is free .to slide along the length of the shaft '3, while it is driven thereby in all of its positions.
  • the shafts carrying the upper sprockets 9,5 are provided with gears II4, which'are operatively connected by idler gears H5.
  • the forward gear H4 is driven by gear H6, which is rigidly connected to a worm gear I".
  • the lower series of sprockets 35 is driven by gear H2 in mesh with idler gear I2I of the foremost of the lower sprocket wheels 95.
  • the gear I22 has rigidly secured thereto a worm gear 123, which is in mesh with a worm I24 on the lower projecting end of the shaft H9. Since all the lower sprocket wheels 95, with the exception of the last one, have to rotate in a direction opposite to that of the upper sprockets 95, one of the The upper sprocket 96 may suitably be driven by means of a worm I21 on a shaft I28 carried by the structure 45.
  • the shaft I28 carriesa worm I29,'which is in mesh with a worm gear I30 also carried by the structure 48.
  • the gear I38 is slidably mounted relative to the gear shaft I3I, which carries a gear I32,
  • the contact 33 is also connected to one side of, an electromagnet I34 associated with the ratchet wheel 82 in the same manner as the electromagnet 8
  • the other side of the electromagnet I34 is connected to thcpower line II, and the arrangement is such that each time contacts 33 and 35 engage, that is, at the end of each reproduction, the ratchet wheel 82 is returned one step towards its initial position until at the end of all visual reproductions the switch 85 is opened and the illumination of the lantern 9I is terminated.
  • the projector ' is'driven by the motor 31 and a selector motor 38 is provided for the proper location of the film.
  • One side ,of the motor 31 is connected to power line Ill.
  • the other side of the motor 31 is connected to one side of a switch as which is connected to the side of the switch I5 which is connected to the re1ay-I3.
  • the switches 28 and 3a are controlled by the lockup relay 39. When the relay29 is locked up, switches 28 and 39 are open.
  • the arm 52 is connected to the power line Hl.
  • the pin 25 is connected to the unlocking winding of. the relay I1, which is connected through the unlocking winding of the relay I to the powe lineII.
  • switch M is open, and switches I4 and I9 are is supplied to either motor 31 or 38.
  • switch 29 is in series with the switch 40 so that' the power line II is connected to a terminal M of a reversing'switch 42 whereby power is supplied to the selector motor 38, this selector motor having its other side connected to the power line'lll.
  • a shaft 5I which carries an insulated arm-52 which is adapted to make contact with the pin 25.
  • the arrangement is such that the arm 52 moves almost through one revolution in one direction and then through one revolution in the opposite direction when driven by the revers-
  • the switches 60, 85 and 85 are open.
  • the credit ratchet wheel is moved a corresponding number of steps from its normal position, closing the switches 60, 65.
  • the operation of the phonograph motor moves the shaft 43 until its abutment 5I engages the projected pin 52 thus locating the phonograph selector for the moving out of the selected phonograph record for playing.
  • the switch 225 is closed momentarily, returning the actuated pin 62 and 'lockin'gup the relays I1 and I8.
  • the locking up-of the relay I1 maintains the switch I 9 open so that the phonograph motor re- 115; 9 1 is deenergized' and the phonograph motor s ps.
  • the locking up of the relay I8 closes the switch 20 so that the motor 38 is put into operation to move the frame 45 in one direction and in the other, and likewise to move the arm 52 in one direction and the other until the arm 52 engages the contact 25 in its position corresponding to the phonograph record selected. This occurs when the-frames constituting thecorresponding film .episodeon the film 34 is in alignment with the light emittingopening 44 of the projector.
  • the motor 31 is not put into operation immediately the relay I3 is unlocked because the switch 39 is open, the relay 29 being locked up.
  • the switch 23 is open.
  • the unlocking winding 39 is arranged so that it requires a substantial current to effect unlocking of the relay 29.
  • current is supplied to the voice coil, but this current is insufiicient to actuate the winding 39.
  • the switch 39 is closed and the switch 2, is closed.
  • the projector motor 31 starts to operate at an instant which is determined .by the sound track on the record.
  • the pictures constituting the film episode are located on the film in such relation that synchronization is obtained between the visual and sound records.
  • I may provide a special sound track on the record to give a suitable signal for starting the motor 31.
  • an initial section of wide amplitude corresponding to inaudible sound, thatis, sound of frequency above or below the range .of the human ear.
  • inaudible a corresponding number of steps away from switch-opening position, theoperation is the same.
  • the phonographmotor stops operation when the switch [2 is closed, because the switch i4 is opened and remains opened until the con-' tacts'29 are opened when the contacts 35 and 33 are brought into engagement at the end of a projecting operation.
  • theratchet wheel 32 merely moves one step toward switch-opening position, but the switch 95 remains closed and the projector lamp remains illuminated.
  • the circuit of the relay I3 is opened by the opening of the contacts and when the switch It closes, the motor relay 91 is energized, its circuit being completed through closed switch l9, closed switch-l4 and the engagesound can readily be arranged to energize the winding 3
  • Synchronism may readily be maintained by employing synchronous motors for the phonograph motor and for the projector motor 31.
  • the locking up of the relay I! also breaks'the circuit of the relay l3 so that the switch- I [closes The momentary engagement between the contacts 33 and as also energizes theelectromagnet' I34 so that theratchet wheel 82 is returned one 13 is locked up, conditioning the motor 39 for visible recordings, in combination, a circular'ar ray of movable selector members, means on said phonograph arranged to move into engagement with any actuated selector member whereby last said means is arrested, a contact operatively connected to lastsaid means whereby said contact is arranged to occupy an-individual position on arrestment of said phonograph means in any selected position, means for moving a multi-subject film to and from relative to the projector, contact means operatively connected to last said film moving means whereby last said contact means is moved to and fro in the path of the positions of first said contact, and means controlled by the engagement of said contact, and; contact means for arresting the to and fro movement or said means for eflecting actuation of any pluralit
  • selector means adapted the light emitting opening of the projector
  • contact member driven by said reversing motor to and fro, a contact arranged to move by steps in the same direction and in step with said arrestable member,.whereby said contact occupies any of a plurality of positions each corresponding to a recording, means controlled by the engagement of said contact and contact member for stopping said reversible motor, and means controlled by the sound record for initiating the operation of said projector.
  • selectormeans adapted to initiate the operation of the phonograph motor and efiect the selection of a sound record, means operated by the phonograph for arresting the phonograph motor before the record is played, a movie selector motor arranged to be to initiate the operation of the phonograph motor and eflect the selection of a sound record, means operated by the phonograph for arresting the phonograph motor before the record is played, a
  • movie selector motor arranged to -be put into operation by said phonograph operated means to locate a movie film in selective corresponding position, means driven by said motor for ter- -minating its drive, for starting the phonograph tel put into operation by said phonograph-operated means to locate a movie film in selective-correspondingposition, means driven by said motor for terminating its drive, .for starting the phono-i graph motor and a movie projector.
  • a plurality of movable selector members adapted to put -the phonograph into operation to efiect the selection and playing of a corresponding series-of sound recordings
  • a .movie selector motor adapted to put -the phonograph into operation to efiect the selection and playing of a corresponding series-of sound recordings
  • a .movie selector motor adapted to put -the phonograph into operation to efiect the selection and playing of a corresponding series-of sound recordings
  • a .movie selector motor adapted to put -the phonograph into operation to efiect the selection and playing of a corresponding series-of sound recordings
  • a .movie selector motor adapted to put -the phonograph into operation to efiect the selection and playing of a corresponding series-of sound recordings
  • a .movie selector motor adapted to put -the phonograph into operation to efiect the selection and playing of
  • a .combined automatic multi-selector phonograph and a selective movie projector ar-. rangedto reproduce synchronized audible and ,visible recordings
  • a plurality of movable selector members adapted to put the motor and the supply or power to the projector motor
  • movie selector means actuated by the movie selector motor to select a film corresponding to the selected sound record
  • means actuated by said movie selector for energizing the phonograph motor, for deenergizing the movie selector motor and for conditioning the projector motor for operation
  • means responsive to the operation of the phonograph for initiating the operation of the projector motor so that its film is in synchronism with the sound record
  • a combined automatic multi-selector phonograph and a selective movie projector arranged to reproduce synchronized audible and visible recordings
  • a plurality of movable 'selector members adapted to put the phonograph into operation to effect the selection and-playing of a corresponding series of sound recordings
  • a movie selector motor a.
  • a switch on said phonograph arranged to open momentarily at the end of the playing or a sound record, a second switch arranged to be closed momentarily when the first said switch is opened, a third switch on said phonograph adapted to be closed momentarily after the phonograph makes each selection, a plurality of movable selector members each adapted when actuated to establish a circuit in parallel with the first said switch and through a motor controlled circuit, a fourth and fifth switch in said motor controlled circuit, each being adapted,when opened to terminate the operation of the phonograph motor, a phonograph selector adapted to be positioned by engagement with any actuated selector member, a movie selector member adapted to move with said phonograph selector member and to be arrested in definite positions corresponding to the actuated selector members, a movie selector motor adapted to move a movie film into

Description

P 1943- J. F. EAKINS 2,330,036
COIN CONTROLLED MOVIE-SOUND MACHINE Filed Sept. 29, 1942 3 Sheets-Sheet l SELECTOR a P 1943- J. F. EAKlNS 2,330,036
COIN CONTROLLED MOVIE-SOUND MACHINE Filed Sept. 29, 1942 3 Sheets-Sheet 2 pfgz 7'0 34015670)? ZAMP Patented Sept. 21, 1943 UNITE-D srArss PATENT OFFICE com comaormn irons-scorn- John F. Eating assignme cage,
Ennston, 111., alsignor, by meme nts, to Plionovision Corporation, Chilli., a corporation of Illinois Application September 29, 1042, Serial No. 480,087
11 Claims. (01. 88 16.2)
This invention relates to coin controlled moviesound machines and has ior one ofitsprincipal objects to provide an improved, simple machine, whereby sound may be reproduced from records in-synchronism with a projected movie. film.
A further object of the invention is to provide an improved movie projector system which can readily be adapted for addition to selective automatic phonographs to provide a visual accompaniment tor the sound reproduction.
In providing a visual reproducer to operate in synchronism with sound produced from phonegraph records, considerable difiiculty arises from the fact that phonograph records do not play for the same length of time, some playing longer than others. Furthermore, considerable dimculty arises in securing synchronism. When the needle hits a record, it cannot be predetermined what part oi the spiral sound groove it will hit and the picture may be out oi synchronism unless special means are provided ior starting the film when the needle is. at 'a definite position on the sound roove.
One-oi the objects of the invention is to pro-- vide an improved connecting system whereby the sound film starts to operate when the needle is at definite position on the sound groove.
' A further object of the invention isto provide tudinal rows oi pictures, each row constituting a separate film episode. r a
Selector means are provided for bringing one row oi pictures constituting one film episode'into alignment with the projector and meansareprovided whereby the film selector is controlled by the. selector oi'the' phonograph. Since in that particular phonographthe selector moves con- L tinuously in one direction, the sound records are selected-inthewder 1, 2,3 9, 10, 1,3,3,- etc. Since the longitudinal rows 01 pictures on film must be moved backward and forward,
. oi the selectors presents a considerable problem because, to move irom selecwhichitisassociatedis.
a picture mechanismoi the tion 10 to selection 1, it is necessary for the film' to 'make a complete travel.
Anotherobject. of the invention is to provide a correlated selector system for the sound. and
visual records whereby it is insured that the proper visual record is brought into operation simultaneously with the corresponding sound record. y
The invention will readily be understood from ti? following description 01 a preierred'embodi-e ment taken in conjunction with the accompanying drawings and with reference to the copending application of Marion R. Winkler, Serial No.- 342,419, filed June 26, 1940, which shows a complete disclosure of the Symphonola phonograph,
and in conjunction with my copending application Serial No; 460,086flled September 29, 1942, which shows in details film and a projector adapted to cooperate therewith for the reproduction of any particular episode on the-film.
Fig. l is a diagrammaticview oi the mechanism of the present invention,- including the principal wiring circuit;.
Pig. 2 is a wiring diagram of the selector and coin control means whereby the controlling pins "of Fig. 1-are actuated into selecting positions;
and
Fig. 3 is a sectional view, showing the moving machine located inside a cabinet.
Fig.1 disclom only that portion of the Winkle:
application which it is to modify for the purpose of the present invention. The reierence numeral I designates a transformerwhich is connected to the power lines III and H. One
end at the secondary oi thetransformer 80 is grounded. The other end of the secondary is connected to a relay .1 which includes the motor switch 08. Whemthe relay 91 is energized, the
- phonograph motoris put into operation.
Therelay I1 is grounded by a switch H or by engagement of an actuated grounded pin 62 into a position-where it engages a contact 83. As will be readily understood from the Winkler application, there is a sumcient number of the pins ll to correspond one toIeach of the recordings de- "sired to be reproducedm'lhe'winkler application a "switch 225 which isadapted to energise a solenold'Ct-which elects thereturn or the pin 0 s.
Fig. 2 discloses selector means whereby any desired number or pins I! corresponding toany desired selections may be paid iorand'the pins selected or projected. Arotary shaft 48 driven bytheselectoroitheoithe phonograph carries an abutment 6 l which is adapted to engage any one of the selected pins 62 so as to terminate the motion of the shaft 43, the position of which shaft determines which phonograph record will be played.
. The solenoid 63 is carried by the shaft 43 so as to be brought into alignment'with the arresting pin 62 and when the solenoid 63 is energized, the arresting pin 62 is returned to its normal position.
The switch 225 is arranged to close momentarily .just before the selected record is moved out toother side of the winding 3| is connected to the record changing-mechanism by .the operating motor of the phonograph, closes the switch ll so that the phonograph continues to operate until the selector record has been played and until it starts to fmove back to the magazine whereupon the switch 4| opens. Consequently, the phonograph motor operatesuntil the last selected record has been played. When the switch 4| opens and no pin 62 is in projected condition the graph motor ceases to operate.
To adapt the Symphonola phonograph of the Winkler application for the present invention, I provide a normally open switch l2 adjacent the switch 4| so that it closed when the switch ll is opened. One side 01 the switch I2 is connected to the power line Ill. The other side is connected to a relay. I3 which is arranged, when energized, to opena switch in the circuit of the motor relay 91. The other. side of the relay I3 is connected to one pole or leaf of a switch l5 ota lockup relay l6. y
In series with the solenoid63 I provide two lockup relays l1 and I8. when the relay I] isenergized, the lockup relay l1 opens and locks open a switch 19 which is also in the circuit of v the motor relay 91. The lockup relay l8, when the phonograph motor'stops until the lockup relay I1 is unlocked.
Upon the shaft 43' I provide a sprocket wheel 2| which is'connected by means 'of a chain 22 to a sprocket wheel 23. The shaft of. the sprocket wheel 23 carries a radial arm 24 which carries at 68, each of which corresponds to one particular its outer end a conductive pin 25. The sprockets II and 23 are of the same size so'that the'pin 25 attains a definite position for each selecting position of the shaft 43. Thus, if the shaft 62 is arrested by the engagement of its abutment 6| with the pin 62 corresponding to re'cord number 1, then the pin 25 has an individual 'position on its circular path corresponding to record number I.
I break one of the lines connecting the amplifier 2l6 to the voice coil of the loud speaker 223 and connect two lines 26 and 21 to the open ends. Across these two lines I connect a switch 263m a lockup relay 29 and in parallel with the switch 28 I connect the unlocking winding 36 of the lockup'relay 23. V
phono- One side of the main 3| of the lockup relay 29 is connected to the powerline H. The
main winding of the lockup relay Hi. The other side of this main winding is connected to the unlocking winding 32 of the lockup relay l6. The other side of (the winding 32 is connected to a contact 33'which bears against the film 34 of the movie projector.
0n the other side of the film I provide a contact 35 which is connected to the power line Hi. The film is provided'with an opening 36 which registers with the contacts 33 and 35 at the end of a projection of a film episode so that momentary engagement is established between the contacts 63 and 35, releasing the relay is, locking up the relay l6 and locking up the relay 29. The momentum of the projector is suflicient to move the opening 36 clear of the contacts 33 and 35 so that the circuit is broken almost immediately.
The machine being intended for coin operation, I provide in the cabinet'means for receiving from patrons coins of various denominations. Thus, as shown in Fig. 2, I provide a coin chute 53, which may be intended for the reception of a dime. A dime falling through this coin chute momentarily closes a switch 56, which is in circuit with an electromagnet 55 located adjacent a ratchet wheel 56. The armature 51 of the mag- -net 55 carries a dog 56 adapted to move the ratchet wheel 56 one tooth from its normal posi-- tion. In this normal position, a pin 59 carried by the ratchet wheel holds open a switch 66; but when the ratchet wheel is moved one or more tooth spaces from its normal position, this switch becomes closed. A similar pin 64 'on the other side of the ratchet wheel is arranged in normal switch 65 is closed.
f Of course, other coin chutes may be provided position of the ratchet wheel to open a switch but when the ratchet "wheel is moved'one'or more tooth spaces from its normal position, the
for the reception 01 coins of other denominations. Thus I mayprovide another coin chute66 for the reception of a fifty cent piece, and in the fifty cent piece coin chute I may provide five switches 61, all of which are connected to operate the magnet.55 so that the ratchet wheel 56 is displaced after pointed out, selections can be made only when. the switch 66 is closed, and each selection eflects return of the ratchet wheel 56 one tooth space towards its normal position.
Selections are made by aplurality of butto stationary contact 1| and a relatively small sta tionary contact 12. Adjacent contacts 1| and 12 are connected together by conductors 13, and one end of the series constituted by contacts", 1l,
12, and conductors 13 is connected to one power line When a button 68 is pressed inwardly, the movable contact 16 clears the contact 12. Consequentlv, if the patron tries to press two buttons 66 simultaneously, separation of one pair or contacts 16 and 12 will prevent the supply of energy to 7 five tooth spaces by the insertion of a fifty-cent piece. 4
The magazine switchconstituted by the ratchet wheel 56 and the switch 66 limits the number of selections which can be made, since, as .herein- Q normal position.
-.any of the solenoids "cannot .be
I Is connected to the' solenoid 15, which is individual to the controlling button 59 and is indi-. vidual to the same'selection. Solenoids 15 are arranged around the individual selector pins 52, the arrangement being such that when one of the solenoids I is energized, the corresponding pin' 92 is projected into the path of the arm II. The button 68 also carries a movable contact I6, which is adapted to establish a circuit between two associated contacts 11 and III. It is arranged so that this last-named circuit is established not later than the instant the contact I0 engages the contact I4, since the establishment of this circuit discharges credit from the ratchet wheel 56; All
the contacts .1] are connected to power line II,
and all the contacts I9 are connected to a com- I mon linev I9 which is connected to an electromagnet 80, similar to the electromagnet 55.
The contact I0 of the button 09 glass, upon which the picture is projected. Light On the other side ofelectromagnet an it is-connected to one side of a magnet 91, which is in turn. connected to the other power line I0 through switch 50. The electromagnet SI is similar to the electromagnet 55, but it is arranged so that it feeds the ratchet wheel 55 one tooth in the opposite direction, that is, towards its normal position, each time that the magnet 9| is energized.
The electromagnet 90 is associated with a ratchetwheel 92 so that on each energization the ratchet wheel 82 is moved one step from its initial or normal position.
The ratchet wheel 92 carries a pin-94, which controls a switch 95. In the normal position of the. ratchet wheel 92 this switch is open, and in all other positions it is closed. The switch 85 is arranged inparallelwith the switch 55, both beingconnected to th'epower line II. The other sides of the switches 95 and 95 are connected to the lamp projector. illuminated at all times during which either of the ratchet wheels 55 or 52 is displaced from their turned to their normal position, the lamp is-disconnected from the power supply. It is to be noted that when there is credit on T the ratchet wheel 59, selections can be made by energizing the appropriate solenoids I5, and each actuation of a" button 59 to make such selections has the eifect -'of moving the ratchet wheel 55 one step back towards itsnormal position and has i the effect of moving the ratchet wheel 92 one step away from its normal position, thus transferring I the credit from the ratchet wheel 59 to the ratchet wheel 82. The other sides of the solenoids. I5 are connected to the side of the switch 90 The circuit through completed adjacent the magnet 9|.
unless the switch 50 is closed.
I The projector mechanism may be substantially identical with that described in my copending application Serial No. 460,080 referred to above.
For the purposes of my invention, I prefer to provide a plurality of film episodes on arelatively large film 34, which in the specific embodiment shown is arranged for ten episodes. The film 94 is wide enough for ten frames 89, and each episode consists 'of one longitudinal series of frames. The frames may be about one-third of an inch wide; and in view of the relatively large size of film necessary. I prefer-to provide at least one additional row of sprocket holes 91, in addition to the sprocket holes 88 along the edge of the film.
When both 'ratchets are re-" The mechanism is contained within cabinet 89, as shown in Fig. 8, which cabinet is provided with a transparent screen 90 suitably of frosted from the lantern 9| is projected through a frame of the film 94 onto a mirror 92, from which it is reflected upon a mirror 99, from which in turn it is again reflected onto the screen. A suitable lens structure 94 is provided on the outer side of the film 34 from the lantern 9| whereby the image is focused upon the screen 90. The film I4 is continuous; its ends being cemented together so as to constitute a relatively large loop. The excess film may be stored in any suitable manner. For example, it may be arranged on sprocket wheels 95 located'behind the lantern 9I so that the major part of the film is located in vertical lengths in the manner shown in Fig. 3.
The film is fed from the sprockets 95 by means of feed sprockets 96 and cooperating rollers I09 ,the phonograph motor are preferably synchro- Consequently, the lamp is nous motors so that the visual and tonal reproductions are maintained in synchronism. The lower sprocket 99 is driven by a shaft I03. The shaft I09 carries a worm I04, which meshes with the worm gear I05 rigidly mounted on the shaft carrying the sprocket 96. I
Also mounted on the shaft I03 is a worm I05, which drives a worm gear I01 rigidly mounted on a shaft I08, which extends through a claw housing'I09 rigidly mounted on the structure 40, which carries the frame 45. The housing I09 car'ries three claws IIO, which are arranged to enter the sprocket holes 81, 98 and effect the normal step by step movement of the film in be of any known or suitable type; and since many such mechanisms are in ordinary use in movie projectors, it is unnecessary to describe the same in detail.
The shaft I03 is driven by a worm III, which meshes with the worm gear I I2, which is carried by the structure 49. The worm gear H2 is slidably mounted on a gear shaft I I9, which extends from the gear reduction housing I02. The arrangement is such that the worm gear I I2 is free .to slide along the length of the shaft '3, while it is driven thereby in all of its positions.
The shafts carrying the upper sprockets 9,5 are provided with gears II4, which'are operatively connected by idler gears H5. The forward gear H4 is driven by gear H6, which is rigidly connected to a worm gear I". The worm gear. III
extending .wheels being driven in opposite"direction's,
have their gear wheels I29 in mesh. The other lower sprockets 95 have their gear wheels'I20I connected in series by intermediate idler gears I2l. i
The lower series of sprockets 35 is driven by gear H2 in mesh with idler gear I2I of the foremost of the lower sprocket wheels 95. The gear I22 has rigidly secured thereto a worm gear 123, which is in mesh with a worm I24 on the lower projecting end of the shaft H9. Since all the lower sprocket wheels 95, with the exception of the last one, have to rotate in a direction opposite to that of the upper sprockets 95, one of the The upper sprocket 96 may suitably be driven by means of a worm I21 on a shaft I28 carried by the structure 45. The shaft I28 carriesa worm I29,'which is in mesh with a worm gear I30 also carried by the structure 48.
The gear I38 is slidably mounted relative to the gear shaft I3I, which carries a gear I32,
which may mesh with a suitable gear, for examplc the gear IIB, to provide the necessary drive for the upper sprocket wheel 96, notwithstanding that the position of this sprocket wheel may vary.
The contact 33 is also connected to one side of, an electromagnet I34 associated with the ratchet wheel 82 in the same manner as the electromagnet 8| is associated with the ratchet wheel 56,. The other side of the electromagnet I34 is connected to thcpower line II, and the arrangement is such that each time contacts 33 and 35 engage, that is, at the end of each reproduction, the ratchet wheel 82 is returned one step towards its initial position until at the end of all visual reproductions the switch 85 is opened and the illumination of the lantern 9I is terminated.
The projector 'is'driven by the motor 31 and a selector motor 38 is provided for the proper location of the film. One side ,of the motor 31 is connected to power line Ill. The other side of the motor 31 is connected to one side of a switch as which is connected to the side of the switch I5 which is connected to the re1ay-I3.
The switches 28 and 3a are controlled by the lockup relay 39. When the relay29 is locked up, switches 28 and 39 are open.
ing notor 38so that the arm 52 may be brought into contact with the pin 25 no matter in what selected, position the pin 25 may be. The movement of the carriage 46 is back and forward .sumcient to bring each film episode into alignment with the light emitting opening.
The arm 52 is connected to the power line Hl.
. The pin 25 is connected to the unlocking winding of. the relay I1, which is connected through the unlocking winding of the relay I to the powe lineII.
When the machine is out of operation, no pins 62 are projected,
The operation is as follows:
switch M is open, and switches I4 and I9 are is supplied to either motor 31 or 38.
locked up.
When the lockup relay I6 is locked up, the
switch 29 is in series with the switch 40 so that' the power line II is connected to a terminal M of a reversing'switch 42 whereby power is supplied to the selector motor 38, this selector motor having its other side connected to the power line'lll. Y,
As is fully. described in my copending applica- .-gears 50, a shaft 5I which carries an insulated arm-52 which is adapted to make contact with the pin 25. The arrangement is such that the arm 52 moves almost through one revolution in one direction and then through one revolution in the opposite direction when driven by the revers- The switches 60, 85 and 85 are open.
If the operator inserts a coin or coins into the coin chutes 53, 86, the credit ratchet wheel is moved a corresponding number of steps from its normal position, closing the switches 60, 65.
If the operator now makes his selection by depressing one of the buttons 88, the corresponding pin 82 is projected and at the same time the magnets 80, 8| are energized, moving the ratchet wheel 58 one step toward switchopening position" and moving the ratchet wheel 82"one step away from switch-closing position. When switch 65 was closed; the projector lamp was illuminated, and the circuit is maintained by the closing of the switch 85 so that the lamp remains illuminated until both ratchets 55 and 82, are returned to normal position. The final return of the ratchet 82 is effected by cooperation between the contacts 33 and 35, after all the visual reproductions paid for have been reproduced, which finally opens the lamp circuit. The projection of a pin 62 completes the circuit of the motor relay 91 so that the phonograph motor is put in operation immediately a button 68 is depressed. Immediately the phonograph motor starts operating switch I2- opens and the switch 4| closes. The closing of the switch I2 had no effect since its circuit was broken atthe switch 28 and the switch I6 is The motor 38 does not operate because the switch 20 is open.
The operation of the phonograph motor moves the shaft 43 until its abutment 5I engages the projected pin 52 thus locating the phonograph selector for the moving out of the selected phonograph record for playing. Before the phonograph record is moved out, the switch 225 is closed momentarily, returning the actuated pin 62 and 'lockin'gup the relays I1 and I8.
The locking up-of the relay I1 maintains the switch I 9 open so that the phonograph motor re- 115; 9 1 is deenergized' and the phonograph motor s ps.
The locking up of the relay I8 closes the switch 20 so that the motor 38 is put into operation to move the frame 45 in one direction and in the other, and likewise to move the arm 52 in one direction and the other until the arm 52 engages the contact 25 in its position corresponding to the phonograph record selected. This occurs when the-frames constituting thecorresponding film .episodeon the film 34 is in alignment with the light emittingopening 44 of the projector.
Engagement between the arm 52 and the contact 25 unlocks the relays I1 and I6. Consequently, the phonograph motor is put into operation to bring the selected record out onto the turntable and to start playing the selected record. The unlatching of the lockup relay It opens the circuit of the reversing motor 33 so that the film is no longer moved in one direction and in the other direction and the pictures constituting the corresponding film episode are in alignment with the light emitting opening 44.
The motor 31 is not put into operation immediately the relay I3 is unlocked because the switch 39 is open, the relay 29 being locked up. The switch 23 is open.
The unlocking winding 39 is arranged so that it requires a substantial current to effect unlocking of the relay 29. when the record starts to play, current is supplied to the voice coil, but this current is insufiicient to actuate the winding 39. when, however, the music starts, the current through the winding 39 increases to an extent which results in the unlocking of the relay 29. Thereupon, the switch 39 is closed and the switch 2, is closed.
Consequently, the projector motor 31 starts to operate at an instant which is determined .by the sound track on the record. The pictures constituting the film episode are located on the film in such relation that synchronization is obtained between the visual and sound records.
It will of course be-understood that I may provide a special sound track on the record to give a suitable signal for starting the motor 31. Thus, at a definite position on the sound track of the record, there may be provided an initial section of wide amplitude, corresponding to inaudible sound, thatis, sound of frequency above or below the range .of the human ear. Such inaudible a corresponding number of steps away from switch-opening position, theoperation is the same. The phonographmotor stops operation when the switch [2 is closed, because the switch i4 is opened and remains opened until the con-' tacts'29 are opened when the contacts 35 and 33 are brought into engagement at the end of a projecting operation. In this case theratchet wheel 32 merely moves one step toward switch-opening position, but the switch 95 remains closed and the projector lamp remains illuminated. At the end of such operation, the circuit of the relay I3 is opened by the opening of the contacts and when the switch It closes, the motor relay 91 is energized, its circuit being completed through closed switch l9, closed switch-l4 and the engagesound can readily be arranged to energize the winding 3| without the reproduction of a sound in the loud speaker 229 which can beheard by the listeners. I prefer, however, to employ the normal sound recording of music or other -recorded material which is to be reproduced in the speaker 229 since in this way! avoid the-necessity ofspecial records.
The sound recording and the corresponding film episode are now reproduced in synchronism. Synchronism may readily be maintained by employing synchronous motors for the phonograph motor and for the projector motor 31.
Since sound recordings do not have exactly the ment'of one or more of the contacts 33 with one or more of the projected pins 92.
- Consequently, the cycle of operations above described is repeated, selected records being reproduced by the phonograph and the corresponding film episodes being reproduced by the projector. When all the selections have been reproduced, no pins 62- are in projected condition and when the last film episode has been, projected, the opening .38 establishes engagement between the contacts 33 and 35 with the result that the whole machine is put out of operation until further; coins are inserted and further selections made.
Although my invention has been described in connection with specific details of a preferred embodiment thereof, it must be understood that such details are not-intended to .be-limitative ofv the invention except in so far as set forth in the phonograph and aselective movie projector arranged to reproduce synchronized audible and same duration, I prefer to make the film 33 of such length so that it takes somewhat longer for the complete film to pass through its cycle than it does for the longest record which is to be played. The sound recording is therefore reproduced while the motor 31 is still operating and the record changing cycle of the phonograph goes i operation by closing the switch 40, and the relay 29 is locked up, opening switches 29 and 39.
The locking up of the relay I! also breaks'the circuit of the relay l3 so that the switch- I [closes The momentary engagement between the contacts 33 and as also energizes theelectromagnet' I34 so that theratchet wheel 82 is returned one 13 is locked up, conditioning the motor 39 for visible recordings, in combination, a circular'ar ray of movable selector members, means on said phonograph arranged to move into engagement with any actuated selector member whereby last said means is arrested, a contact operatively connected to lastsaid means whereby said contact is arranged to occupy an-individual position on arrestment of said phonograph means in any selected position, means for moving a multi-subject film to and from relative to the projector, contact means operatively connected to last said film moving means whereby last said contact means is moved to and fro in the path of the positions of first said contact, and means controlled by the engagement of said contact, and; contact means for arresting the to and fro movement or said means for eflecting actuation of any plurality of 1 said movable selector members, means on said phonograph arranged to move in one direction until it is-arrested by any actuated selector member, thereby determining the sound record to be reproduced,said selective movie projector being provided with a guide for a large film having a plurality of rows of pictures, each row be ng appropriate to one sound record in the phonograph, a reversing motor for moving said guide to and i fro to move every row of pictures past the light ber, whereby said contact occupies any of a plurality of positions each corresponding to a removie selector motor, amplifier control means for initiating the operation of the projector motor. and film controlled means for terminating the operation of the projector motorand for conditioning the movie selector motor for operation.
6. -In a combined automatic multi-selector phonograph and a selective movie projector arranged to reproduce synchronized audible and visible recordings, in combination, selector means cording, and means controlled by the engagement of said contact and contact member for stopping said reversible motor.
3. In a combined automatic mu l.ti-selector; phonograph and a selective movie projector ar ranged to reproduce synchronized audible and visible recordings, in combination, a circular array of movable selector members, manual selector :means for efiecting actuation of any plurality of provided with a guide for a large film having a plurality of rows of pictures, each row bein appropriate to one sound record-in 'the phonograph, a reversing motor for moving said guide .to and fro to move every row of pictures past adapted to initiate the operation 01 the phono- .graph motor and efifect the selection of a sound record, means operated by the phonograph for arresting the phonograph motor before the record is played, a movie selector motor arranged to be put into operation by said phonograph operated means to locate a movie film in-selective corresponding position, means driven by said motor for terminating its drive, for starting the phonograph motor and a movie projector motor arranged to be conditioned for operation by said movie selector motor, amplifier control means for initiating the operation of the projectormotor, and means for automatically terminating the operation of the phonograph motor at the end of the playing of a record. y
7. In a combined automatic multi-selec'tor photo reproduce synchronized audible and visible recordings, in combination, selector means adapted the light emitting opening of the projector, a
contact member. driven by said reversing motor to and fro, a contact arranged to move by steps in the same direction and in step with said arrestable member,.whereby said contact occupies any of a plurality of positions each corresponding to a recording, means controlled by the engagement of said contact and contact member for stopping said reversible motor, and means controlled by the sound record for initiating the operation of said projector.
4. In .a combined automatic multi-selector phonograph and a "selective movie projector arranged to reproduce synchronizedv audible and visiblerecording's, in combination, selectormeans adapted to initiate the operation of the phonograph motor and efiect the selection of a sound record, means operated by the phonograph for arresting the phonograph motor before the record is played, a movie selector motor arranged to be to initiate the operation of the phonograph motor and eflect the selection of a sound record, means operated by the phonograph for arresting the phonograph motor before the record is played, a
movie selector motor arranged to -be put into operation by said phonograph operated means to locate a movie film in selective corresponding position, means driven by said motor for ter- -minating its drive, for starting the phonograph tel put into operation by said phonograph-operated means to locate a movie film in selective-correspondingposition, means driven by said motor for terminating its drive, .for starting the phono-i graph motor and a movie projector. motor ar ranged to be conditioned for=opei ation by said movie selector motor, and amplifiercontrol means I for initiating the operation tor.
of th egiprojector mo- 5. In la combined automatic niu'lti-selector phonograph and a selective movie {projector arranged to reproduce synchronized audible and visible'recordings, in .combination,'- selectorfmeans adapted to initiate the operation of the phonograph proton and effect the's'el'ection of a sound record, means operated by-the phonograph for arresting the phonograph motor before the record motor and a movie projector motor arranged to be conditioned for operation by said movie selector motor, amplifier control means for initiating the operation of the projector motor, means ,for automaticallyterminating the operation of the phonograph motor at the endof the playing of a record, and film controlled means for causin the phonograph motor to resume playing.
8. In a combined automatic multi-selector phonograph and a selective movie projector arranged to reproduce synchronized audible and visible recordings, in combination, a plurality of movable selector members adapted to put -the phonograph into operation to efiect the selection and playing of a corresponding series-of sound recordings, a .movie selector motor, a projector motor, means controlled by the phonograph selector for controlling the supply of power to last said motors and for interrupting the operation of the phonograph motor, switch means controlling the operation of the movie selector motor and the supply of power to the projectormotor, movie selectormeans actuated by the movie selector mo-' tor to select a: film, corresponding to the selected sound record, means. actuated by. said movie selector for energizing the phonograph'motor, for deenergizing the movie selector motor and-for conditioning the projector motor for operation,
and means responsive to tha -operation of the phonograph for initiating the operation of the projector motor so'tha-t its film is'in synchronism with the sound record. I
9. In a .combined automatic multi-selector phonograph and a selective movie projector ar-. rangedto reproduce synchronized audible and ,visible recordings, in combination, a plurality of movable selector members adapted to put the motor and the supply or power to the projector motor, movie selector means actuated by the movie selector motor to select a film corresponding to the selected sound record, means actuated by said movie selector for energizing the phonograph motor, for deenergizing the movie selector motor and for conditioning the projector motor for operation, means responsive to the operation of the phonograph for initiating the operation of the projector motor so that its film is in synchronism with the sound record, and means controlled by the phonograph at the end of its sound r roduction tor arresting the phonograph motor.
0. In a combined automatic multi-selector phonograph and a selective movie projector arranged to reproduce synchronized audible and visible recordings, in combination, a plurality of movable 'selector members adapted to put the phonograph into operation to effect the selection and-playing of a corresponding series of sound recordings, a movie selector motor, a. projector motor, means controlled by the phonograph selector for controlling the supply of power to last said motors and for interrupting the operation of the phonograph motor, switch means controlling the operation of the movie selector motor and the supply of power to the projector motor, movie selector means actuated by the movie selector motor to select a film corresponding to the selected sound record, means actuated by said movie selector for energizing the phonograph motor, for deenergizing the movie selector motor and for conditioning the projector motor for operation, means responsive to the operation of the phonograph for initiating the operation or the projector motor so that its film is in synchronism with the sound record, means controlled by the phonograph at the end or its sound reproduction i'or arresting the phonograph motor, and means controlled by the film at the end of its reproduction for interrupting the supply or energy to the movie selector motor and the pro- Jector motor, for conditioning the movie selector motor for operation, and for initiating the operation of the phonograph motor.
11. In a combined automatic multi-selector phonograph and a selective movie projector arranged to reproduce synchronized audible and visible recordings, in combination, a switch on said phonograph arranged to open momentarily at the end of the playing or a sound record, a second switch arranged to be closed momentarily when the first said switch is opened, a third switch on said phonograph adapted to be closed momentarily after the phonograph makes each selection, a plurality of movable selector members each adapted when actuated to establish a circuit in parallel with the first said switch and through a motor controlled circuit, a fourth and fifth switch in said motor controlled circuit, each being adapted,when opened to terminate the operation of the phonograph motor, a phonograph selector adapted to be positioned by engagement with any actuated selector member, a movie selector member adapted to move with said phonograph selector member and to be arrested in definite positions corresponding to the actuated selector members, a movie selector motor adapted to move a movie film into any of a plurality of positions for reproduction of any of a plurality of film episodes, an arm driven by last said motor for engaging said movie selector member in any of its said positions, a first lockup relay in series with third said switch adapted'to lock the fifth said switch open, a second lockup relay in series with first said lockup relay and electromagnetic means in series with said relay for returning the actuated selector members to initial position, a power switch on second said relay adapted to lock up a switch for the supply of energy to said movie selector motor and to the projector motor, a third lockup relay adapted when energized to connect last said switch to the movie selector motor and whenunlocked to connect last said switch to contacts on a fourth lockup, relay, second said switch being arranged to be connected to the power supply switch when the third lockup relay is unlocked, a relay in series'with second said switch for efiecting the opening or fourth said switch, the engagement of said arm andsaid contact being arranged to complete a circuit through the unlocking circuit of first said lockup relay and through the unlocking circuit of the third lockup relay, a film controlled circuit connected to the unlocking winding of second said relay, to the lockup winding of third said relay, and to the lockup winding of fourth said relay, and an amplifier'controlled circuit connected to the unlocking winding of the fourth lockup relay, whereby the phonograph motor is put into operation to select a sound record and its operation is terminated before the playing of the record and simultaneously with the initiation of the movie selector motor and resumed after the movie selection is made, the operation or the movie selector motor is terminated and the projector motor is conditioned for operation, the projector motor is started, the phonograph motor is stopped after the sound record is reproduced, and the projector motor is stopped after projection of the film episode and the phonograph motor is conditioned for renewed operation.
JOHN r". EAKINB.
US460087A 1942-09-29 1942-09-29 Coin controlled movie-sound machine Expired - Lifetime US2330036A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2416210A (en) * 1944-03-13 1947-02-18 Wurlitzer Co Film selecting mechanism
US2434201A (en) * 1944-02-23 1948-01-06 Mary A Engelken Control system for multiprogram projectors
US2434200A (en) * 1944-02-23 1948-01-06 Mary A Engelken Multiprogram projector
US3522988A (en) * 1964-09-22 1970-08-04 Intern Fonovisione Spa Soc Automatic audio and audio-visual projection apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434201A (en) * 1944-02-23 1948-01-06 Mary A Engelken Control system for multiprogram projectors
US2434200A (en) * 1944-02-23 1948-01-06 Mary A Engelken Multiprogram projector
US2416210A (en) * 1944-03-13 1947-02-18 Wurlitzer Co Film selecting mechanism
US3522988A (en) * 1964-09-22 1970-08-04 Intern Fonovisione Spa Soc Automatic audio and audio-visual projection apparatus

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