US1480992A

US1480992A - chipman

Info

Publication number: US1480992A
Authority: US
Publication date: 1924-01-15
Anticipated expiration: 1941-01-15

Description

Jan. 15 1924. 1,480,992;

H E. CHIPMAN- TALKING PICTURE TRANSFER MECHANISM Filed Jan. 26. 1921 '7 Sheets-She et l Jan. 15, 1924.

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H. E, CHIPMAN TALKING PICTURE TRANSFER MECHANISM Filed Jan. 26. 1921 Jan. 15 1924.

H. E. CHIPMAN TALKING PICTURE TRANSFER MECHANISM Filed Jan. 26 1921 7 Sheets-Sheet 4 Jan. 15 p 1924.

w H. E. CHIPMAN TALKING PICTURE TRANSFER MECHANISM 7 Sheets-Sheet 5 Filed Jan. 26 1921 fig. 14.

A 375 al l'om lcu V Jan. 15 1924.

1,480,992 H. E. CHIPMAN TALKING PICTURE TRANSFER MECHANISM Filed Jan. 26. 1921 7 Sheets-Sheet e vwmtoz ssi fi a Jan. 15 1924.

H. E. CHIPMAN TALKING PICTURE TRANSFER MECHANISM i921 '7 Sheets-Sheet 7 Filed Jan. 26

IIIIII/IIIIIIIA I Svwzwtoz if/r7 Patented Jan. 15, 1924.

UNITED STATES PATENT OFFlCE.

HARRY E. CHIPMIAN, OF NEW HAVEN, CONNECTICUT, ASSIGNOR, BY DIRECT AND MENE ASSIGNMENTS, TO WILLIAM A. CHIPMAN AND HOWARD H. CHIPMAN, BOTH or new YbBK, N. Y.

TALKING-PICTURE TRANSFER MECHANISM.

Application flied January 26, 1921. Serial No. 439,913.

or member. In the preferred form of the device a magnetic sound record on the-face of a continuous film carrying negative images to beused in the production of moving pictures is transferred to a similar magnetizable member on a positive film strip at the same time that the negative images are imprinted upon the positive film to form the positive images which are tobe used for production.

In my application Serial Number 439,912, production and reproduction of talking motion pictures, filed on even date herewith,

I have described the production of a magnetic sound record on a metal ribbon or the like carried by the negative motion picture film, the photographic record and the record of the soundsaccompanying the action of the picture'being recorded simultaneously on the samefilm strip. For reproduction,

I a postive must, of course, be printed from the negative photographic images and accordingly the magnetic sound record must be transferred to the positive film strip. The object of my invention is to provide practical and efiicient mechanism for transferring the photographic record and the sound record.

In=.:practicin, my invention thenegative and positive films are progressed at a constant rate past an exposure opening, whereat 'thepositive images are imprinted. The negative film passes. between the pole pieces of electromagnets in which magetism of varying intensity is induced, corresponding to the varying magnetic ihtensity of the magnetic sound record of the negative film.

Correspondingfluctuations of current are induced in an accompany ng circuit, which latter fluctuations, preferably after being considerably amplified, are caused to vary the magnetic field of other electro-magnets, between the pole pieces of which is progressed the strip of magnetizable material on the positive film.

My invention comprises the various combinations of elements and structural details whichgo to make upan effective apparatus of the character referred to, as will be more fully pointed out hereinafter.

In order that a clearer understanding of my invention may be had attention is hereby d1- rected to the accompanying drawings forming part of this application and illustrating one embodiment of my invention. In the HEesUE drawings Fig. 1 represents a side elevation of a transfer mechanism of the character re ferred to embodying my invention, Fig.2 is atop plan view of the same, Fig. 3 is an enlarged end elevation of a portion of the same, Fig. 4 is an enlarged side elevation of a part of the mechanism shown in Fig. 1,

Fig. 5 is a top plan view of either the magnetic reproducing or recording device shown partly in section, Fig. 6 is a section taken on line 66 of Fig. 5, Fig. 7 is an end elevation of the apparatus shown in Fig. 6, Fig. 8 is a diagrammatic view of the motor starting, stopping], and locking mechanism, and connections, ig. 9 is a wiring diagram for the magnetic sound record transfer devices, Fig. 10 is an enlarged partial top plan view of the apparatus corresponding to the right hand end portion of the view shown in Fig. 2, Figs. 11-, 12 and 13 are respectively cross sections taken on the lines 11 -11, 12-12 and 1313 of Fig. 2, on enlarged scales and Fig-14.- is an end elevation of the motor controlling mechanism.

Referring to the drawings, the positive film 1 is wound on a reel 2 and the negative film 3 is wound on a reel 4. These films are progressed from

reels

2 and 4 on to reels 5 and 6 respectively.

Each film, such for example as the film 1,

may be the usual transparent moving picture film having perforations 7 therethrou h adjacent the edges thereof.

Strips

8, 8 0 thin,

Pill

tions 7. As shown a pair of metal strips 8 are preferably carried by each film, these strips on the negative film carrying the magnetic sound record in duplicate, which record is transferred to or copied on the corresponding metal strips on the positive film, preferab y on an amplified scale.

The negative film- 3 is progressed through what I may term a re-producing head 9,-

containing electro-magnets in which variations of magnetism are induced by the passage of the magnetic sound record between the same. The positive film 1 passes through what if term a recording head 10, containing electro-magnets which are energized by amplifying circuit connections with the magnets in the head 9, so that a record of corresponding magnetic variation shall be impressed on the strips 8 of film 1 passing through head 1().'

F ilms

1 and 3 pass together past an exposure opening in the light box 11 where the photographic printing is e'lfected.

A motor 12 is employed, this rotating a sheave 13 on shaft 14, sheave 13 being driven by a belt 15.

Shafts

24 and 25 are rotated,

eachat the same speed, from shaft 14. Sprockets on

shafts

24 and 25

progress films

1 and 3 at the same rate, and the take-up reels and 6 are driven by connections from sheaves or

pulleys

16 and 17 on

shafts

24 and 25. r

Preferably provision is made for progress keyed, a knurled head 22 being provided atv the end of shaft 14 for adjusting the same.

- When the shaft is in the position shown in Fig. 12, gear 18 thereon will mesh with

gears

23, 23 on

shafts

24 and 25. When shaft 14 is pushed in somewhat, I gear 18 will move out of mesh with gears 23 and gear 19 will move into mesh with

gears

26, 26 on

shafts

24 and 25. Correspondingly gear is adapted to mesh with gears 27 27 on

shafts

24 and 25, whereby various speeds may be given the said shafts. v i

v The apparatus may be supported by a main frame 28 carrying a table 29. .

Reels

2 and 4 are rotatively mounted on shafts 30 and 3-1 which are carried by

brackets

32 and 33 extending upwardly and downwardly from the table or horizontal support 29. The

heads

9 and 10 are carried from support 29 by supporting

means

34 and 35 as is shown in Fig. 1.

Reels

5 and 6 are rotatably mounted on

shafts

36 and 37 which are carried by

brackets

38 and 39 from support 29.

" antenna The light box 11 may be supported by a standard 40 and may itself serve as a support for table 29. p

Driving connection for reel 5 is eifected by a belt 41 which extends from sheave 16 on shaft 24 to a sheave 42 on shaft 36 and correspondingly reel 6 is rotated by a belt 43 which extends from sheave 17 to a sheave 44 on shaft 37.

A friction or yielding device should be inserted in the driving connection of the

reels

5 and 6 to preventthe possibility of breaking the films. A suitable arrangement is shown in Fig. 11 in which sheave 42 is loosely mounted on shaft 36 but is frictionally secured thereto by a friction disc 45 which is secured to shaft 36, sheave 42 being pressed into engagement with disc 45 by means of a spring 46 on shaft 36, the tension of which is adjusted by a nut 47 mounted.

on a screw threaded portion of the shaft. In the same manner, sheave 44 is connected to shaft 37 by a friction disc 48. v

The

reels

2 and 4, from which the films are drawn, should be held fric'tionally so that the films will be drawn evenly therefrom. An arrangement by which this may .be accomplished is indicated in Fig. 13in which retarding

friction discs

49 and 50 are secured on

shafts

30 and 31, retarding with pawls 53".-

The upper or positive film -1 is guided between

idlers

54, 54, on the entrance side of the head 10 and by

idlers

55, 55, after it has passed through head 10. Similarly, film 3 is guided by

idlers

56, 56 and 57, 57,

idlers

54 and 56 being carried by brackets 58, 58-

and idlers and 57 by

brackets

59, 59 which extend upwardly and downwardly, respectively, from table 29. I

The films which are thus spaced apart when they pass through the

heads

10 and 9 are brought into parallel contacting relation as they enter the light box 11, the two films passing together between

idlers

60 and 61 which are secured on brackets extending upwardly, and downwardly, respectively, from table 29. After passing through the light box, the films pass-between a similar pair of

idlers

62, 63. After this the film 1 passes over an idler 64, thence under sprocket which is fast on shaft 24 (Fig. 12), thence over idler 66, from which point the film is led on to reel 5. Similarly the film 3 passes under idler 64, thence over sprocket 65 and under idler 66' from which pointthe film passes on to the reel 6.

Tn the recording head 10 the film 1 passes through a horizontal slot 67 between the Inn has

cores or pole pieces 68 and 69 of a pair of upper electro-magnets 70 and 71 and the cores or pole pieces 72 and 73 of a pair of lower electro-magnets 7 4 and 75. The upper pole pieces 68 and 69 are spring-pressed into engagement with the upper surfaces of the

metal strips

8, 8, on the film 1 and the lower pole pieces 72, 7 3, are spring-pressed into engagement with the under surface of the film in longitudinal alignment with the]

metal strips

8, 8. If the

films

1 and 3 are each provided with a single magnetizable strip as 8, it is, of course, only necessary to provide the

heads

10 and 9 with upper and lower electro-magnets operating with the single strip in each instance.

Each core piece such as 69 may be carried by a spring strip .76 the ends of which are slidably mounted on pins 77 which extend upwardly from the casing, strip 7 6 being pressed downwardly by spiral springs 78 which surround pins 77 and bear at their upper ends on the heads of pins 77 and at their lower ends against the strip 76. The other core pieces are spring-pressed into contacting position in similar manner.

The lower electro-magnets 7 and are preferably secured in blocks 79 which are secured to the bottom of the casing while the upper electro-magnets are secured in

blocks

80,80 which are adjustable in the longitudinal direction of the film, these blocks be-.

ing secured in adjusted position by means of

set screws

81, 82. By this means the upper core pieces may be separated a slight distance in the longitudinal direction of the film from the core pieces of the corresponding lower electro-magnets as I find that an improved effect is obtained. when there is a slight gap in the longitudinal direction of the film between the upper and lower pole pieces. The casing of the head 10 is preferably made with separable upper and lower portions, which may join together at the horizontal central plane indicated at 83.

The construction of the lower head 9 is preferably identical with that of the upper head 19 and accordingly will not be described in detail. The mechanical arrangement of the recording and reproducing electro-magnets and their casings is prefererably the same as that which is described in my copending application production and reproduction of talking motion pictures referred to above.

Electrical connections whereby the magnetic sound record on the metal strips carried bythe negative film 3 are reproduced on the metal strips 8 of the positive film 1, will now be described, referring to 9. Each one of the recording and reproducing elec-- I tro-inagnets is provided with a primary and a secondary winding, each secondary winding having many more turns than the corresponding primary windings.

is progressed between the pole pieces of the upper and lower electro-magnets, an electric current which fluctuates in accordance. with the variations of magnetic intensity in the magnetized metal ribbon of the film will be induced in the primary windings 8st, 84, the circuit extending from one terminal of the induction coil winding 87 through conductor 89, thence through the two

primary windings

84 and 84 in series and thence returning by connection 90 to the other side of winding 87. A corresponding fluctuating current will be induced in the secondary windings 85, 85', these being connected, in

series, with each other and with the

wires

89 and 90, the result being that a fluctuating current from both the primary and secondary windings, one reinforcing the other, flows through the primary winding 87 of coil 86.

The upper and lower reproducing electromagnets on the opposite side of the film, which coact with theother magnetic sound record carried by the film, are wound in exactly the same way, and are connected by connections similar to those shown at 89 and 90 to the same connection points 91 and 92. towhich wires 89 and 90'2116 connected.

The fluctuating current induced in winding 88 of the induction coil is carried by a circuit 93, 94. the two wires'ot which are secured to the

terminals

95 and 96 of an amplifying device which is diagrammatically illustrated at 97. I prefer to use an amplifier of the audion type such as the well known de Forest audion amplifier, the details of which need not be illustrated.

The fluctuations amplifier 97 are greatly amplified, the amplified fluctuating current flowing from the amplifier over circuit 98,- 99 to which the windings of the recording electro-magnets in head 10 are connected. Considering one upper electro-magnet and the corresponding lower electro-ma-gnet of the recording head 10. the upper electro-magnet is provided with a primary winding 100 and secondary windin 101-while the lower electro-magnet is simi arly provided with primary and secondary windings 100' and 101. These windings are connected together and to

conductors

98 and 99 in the same manner that of current entering the windings of the reproducing. head, de-

scribed above are connected to each other and to the

conductors

89 and 90. The windings of the upper and lower recording electro-magnets on the opposite side of the film are similarly connected to the same terminal points 102 and 103, to which the conductors leading from the

coils

100, 101 and 100, 101' are connected. In both the-recording and reproducing electro-magnets the secondary windings should be next to the core in each instance.

As a result of the construction described, the cores of the recording electro-magnets will be magnetized with an intensity which varies at each moment-in accordance with the. fluctuations of current in

circuit

98 and 99 and the metal ribbons 8. carried by the positive film 1, will have corresponding variations of magnetic intensity impressed there- The two'films pass together across an exposure opening in the light box 11, at which point the pictures on the positive film are printed in the usual manner, the light passing through the negative images on film 3. Means should be provided for adjusting the effective length of the exposure opening across which the films pass, the details 01: which it is not thought necessary to illustrate.

The starting and stopping of motor 12, or the starting and stopping of

reels

5 and 6, constitutes a feature of my invention. At a convenient point on table 29 three push buttons 10 1, 105 and 106 are arranged, in the preferred embodiment of my invention. Button 101 controls the starting of motor 12, whereupon the motor circuit is closed and latched in closed position. Button 105, when depressed, serves to trip the latchin device referred to, so as to stop the motor i button 1041 is in raised position. Button 106 closes a locking circuit, the actuation of which makes it impossible to start the motor until 1 the trip button 105 has first been depressed.

These results are effected by means of a number of electro-n'iagnets which are shown within a frame 107 adjacent to the motor.

The circuit connections for these devices are indicated in l ig. 8. Motor 12 may be operated from mains 108 by means of a plug and socket connection indicated at 109, 109", the motor circuit being indicated in heavy lines.

-Upon pressing the starting button 104, current flows from battery, or any conven ient source, 110, through connection 111, thence through contacts 112 which are closed by button 104e, thence through connection 113., through a pair of electro-magnets 11 1 and 115, in series, and thence by connection 116 back to battery. lElectro-magnets 114i and 115, upon being energized, attract their armatures which are secured respectively upon

neeoeea levers

117 and 118 which are pivoted respec-' Referring to Fig. 1 1, one of the levers 117.

and 118, is provided at its right hand end with an upwardly extending member 127. A. horizontal pin 128 is slidably mounted in a pairv of vertical frame members 129 and 130 of the relay casing 107. This pin carries an armature 131 which is adapted to coact with the electro-

magnets

132 and 133. 1 1-spiral spring 134 surrounds pin 128 and bears against armature 131, to press the pin to the right, referring to Fig. 14. When so pressed, and when the armature levers 117 and 118 are in neutral position, the forward end of pin 128 bears against the face of a boss 135 on the vertical extension 127.

/Vhen starting, button 101 has been depressed, to energize electro-magnets 11 1- and 115, the vertical member 127 will be lowered so that the forward end of pin 128 will be forced by spring 134 over the top of boss 135. Accordingly, levers 117 and 118 will be locked in the positions inwhich the same have been swung by the energizing of electro-magnets 114; and 115, and the connections of the motor circuit will remain closed after the starting button 104 has been released. It will be noted that the armature levers indicated at 117 and 118 are rigidly connected to swing together, as by connecting

strips

117 and 117 of insulating material.

When the motor is to be stopped button 105 is depressed whereupon circuit is com-- pleted from battery through connection 111 and the spring contacts 136 of button 105, and through electro'

magnets

132 and 133 and back to battery by connection 116. The electro-

magnets

132 and 133 being energized attract their armature 131 whereupon pin 128 is withdrawn from its latching position above lug 135, and levers 117 and 118 swing back into their neutra positions breaking the motor circuit.

"it is sometimes'desirah-le to prevent operation of the apparatus, in which case button 106 is depressed to close contact across the ,spring contacts 137.

When button 106 is depressed, current 1 will flow from battery 110, through conductor 111, contacts 137, conductor 138, electrotit ergization of electro-

magnets

139 and 140 raises arm 127 (Fig. 14) above its normal position so that the end of pin 128 will catch under the boss 135 thereby locking

armature levers

117 and 118 in a position in which the motor circuit is open and cannot be closed by depressing button 104. In order to operate the apparatus it is accordingly necessary to depress the trip button 105 whereupon

electromagnets

132 and 133 will be energized to withdrawpin 128 from its engagement with lug 135, thus permitting armature levers 117 and 118 to return to their neutral positions.

An automatic sto should also be provided to prevent further ceding of the films when either

reel

5 or 6 becomes filled. Accordingly a stationary contact member 141 is provided, and also a contact member 142 comprising a spring strip, the upper and lower ends of which, 143, are adapted to be engaged by the film wound up on

reels

5 and 6 respectively, when these. reels have been filled. The contact members mentioned may be carried by table 29 as is indicated in Fig. 1.

Members

141 and 142 are provided with contact points at their upper and lower ends, the upper contacts being brought together when the upper reel is filled and the lower contacts when the lower reel is filled. In either case circuit wiil be completed to energize the

trip magnets

132 and 133. In such a case current flows from battery 110 through conductor 116,

electromagnets

133 and 132,- thence through conductor 144, lever 145 which is pivotally mounted at 148, contacts 147, conductor 148, contacts on

members

142 and 141, and thence by conductor 149 backto battery. It will be understood that lever 145 moves with

levers

117 and 118 and may be connected thereto by

strips

117 and 117 of insulating material, previously referred to. Accordingly, when button 104 has been actuated contacts 147 will be closed. The result of energizing electro-

magnets

132 and 133 will be to unlatch pin 128 from boss 135 so as to open the motor circuit as previously explained.

It is thought that the operation of the device will be entirely clear from the above description. It'should be understood that my invention is not limited strictly to the details of construction described but is as broad as is indicated by the accompanying claims, and also that my invention includes various sub-combinations of elements winch are set forth in some of the claims. For example, a testing machine may be constructed having many ofthe features of the complete apparatus described herein in which a film or continuous strip bearing the magnetic sound record is run from a reel such as that shown at 2, to a reel such as that shown at 5 and through a reproducing head such as that shown at 10, suitably connected to telephone transmitters or the like, for testing the reproduction of the magnetic record impressed on the -strip 8.

Suitable wiring connections for the circuits described above are indicated in. Fig. 10. a

What I claim is:--

1. In an apparatus for reproducing film carrying synchronized and registering sound and light records, the combination of means for continuously progressing a film having negative pictures thereon and also a magnetic sound record thereon, means for progressing at the same rate a positive film having a strip of magnetizable material thereon, means for printing positive pictures from said negative pictures on said positive film, and means for reproducing said magnetic sound record on said strip of magnetizable material, during the progress of said films.

2. In an apparatus for reproducing film carrying synchronized and registering sound and light records, the combination of a pair of electromagnets means for progressing between the pole pieces thereof a strip which is permanently ma netized with a varying intensity corresponding to sound vibrations, a second pair of electromagnets, means for progressing between the pole pieces thereof 3. In an apparatus for reproducing film carrying synchronized and registering sound and light records, the combination of sup ly and take-up reels. a reproducing head, electromagnets therein, means for guiding a strip which is permanently magnetized with awarying intensity corresponding to sound v1brations,-from said sup ly reel through said head, between the po e pieces of said electromagnets, and onto said take-u reel, a shaft, means for progressin sai strip therefrom, a prime mover, an means for rotating said shaft therefrom at various adjustable speeds.

4. An apparatus for reproducing film carrying synchronized and registerin sound and light records, the combination 0- upper and lower supply and take-up reels, means for progressing, at the same rate, a positive film from the upper supply to the upper take-up reel anda negatwe film from the lower supply to the lower take-up reel, said positive filrn carrying a strip of magnetizalole material and said negative film a strip which is perl'nanently magnetized with a varying intensity corresponding to sound vibrations, a light box, means for causing said films in passing from said supply reels to said take up reels to pass in contact with each other across theexposure opening of said box, to rint on the positiyetilm from the negative Elm, recording and reproducing heads, means for causing the positive and negative films respectively in passing from said supply reels to said take-up reels to pass through the same, said heads containing electromagnets aligned with said magnetizalole and magnetized strips, and means for causing a fluctuating current to flow messes through the elcctromagnets of said recordinghead corresponding to the current induced in the windings of the electromagnets of said reproducing head by the passage of the magnetized strip past the same, said printing and magnetizing means cooperating; to reproduce upon the positive film the sound and light records carried by the negative film in similar synchronisrn and registration.

This specification signed and witnessed this 12th day of January, 1921.

' HARRY E, GHKPMAN. Witnesses Warmer: F; CHIPMAN, Jr, M. J. NEENAN.