US1203191A - Method and means for recording and reproducing variations in light. - Google Patents

Description

C. E. FRITTS, DECD.

METHOD AND MEANS FOR RECORDING AND RE u H G .L N v ..m m I I. v. R A NM 0 m D E N DnE PR APPLICATION FI'LED JUNE 22. 1912.

Patented Oct. 31,1916.

'--2 SHEETSSHEET l- M M mm c. E. FRITTS, DEGD. l. H. FRITTS, ADMINISTRATRIX.

METHOD AND MEANS FOR RECORDING AND REPRODUCING VARIATIONS IN LIGHT. APPLICATION FILED JUNE 22. I912. RENEWED MAR.1. I916.

l,203,1 9 1 Patented Oct. 31, 1916.

2 SHEETSSHEET Z.

War/M5555.- f f 155 I 5 1.1% w 215m CAI (BMMW -BY 07L ai $531231 UNITED STATES; PATENT OFFICE.

ASSIGNMENTS, T OHN D. MYERS,

NEW YOBK, ASSIGNOB BY MESNE 0F PHILADELEEHIA, PENNSYLVANIA.

nrnon Aim mums roa ancoa'nme AND :anrnonuonvc vaarnrrons in near.

To all whom it may concern: 7 l

tric currents in a ratus disclosed for utilizing Be -'t known that CHARLns Epean FRn'rs, now deceased, but formerly a citizen of the United States residing at Oneonta, 1n the county of Otsego and State oi New York, didinvent a new and useful Im rovement m Methodsand Means for Recor 'ngjand Reproducing Variations in Light, of wh ch the 'following is a specification. This invention relates to recordlng varia;

tions or pulsations in sounds, light or elecand reproducing the same at will not merely at the-instrument instrument suitably connected therewith.

The present application is a div sion and alone, but also at any'other' Specification of Letters Patent.

ori ami application filed October as, 1880,8erial1i'o. 19,313,

' y 1918, Serial No. 705,858. IBenewed March 1,

permanent or tangible form continuationof the original application, Se-

rial No. 19,313, filed ctober 22,1880, and relates to one of the-forms of record shown and described in said ori 'nal appl1cat1on., The present invention includes the apphcation of photography and electrlclty recording and reproducing the variations or pulsations above mentioned. 0

For convenience of descriptlon the appathe record roduced will be called a phonograph, but it is to beexpressly understood that it is not the intention to limit the scope of the invention to what is commonly known as or done by the so-called phonograzhs or tgfnarrow or e mven ion in any restrict the scope of t way, but the term is used merely for convenience. I v

The novel features of the invention will be apparent from the following description taken in connection with the accompanying drawings.

In the drawings, Figure 1 is-an edge view of a speaking diaphragm having a shutter mounted thereon such as may 9 usedin carrying out the invention. Fig. 12 is a view partly broken away showing a speaking diaphragm carrying a shutter, 'a source of l ght and a roller carrying a sensitive strip exposed to said light through an opening controlled by said shutter.- ig. 3 s ows at the left a plan view of the sensitive strip and rollers and at ri ht an enlarged plan view of a portion of t e strip hav ngthe photo- -f graphic record thereon. Fig. 4 shows two forms of shutter mounted on diaphragms for mum cell with Patented Oct. 31, 1916.

Q Divided and this application filed June 22, 1918. 86118.1 1T0. 81,553.

' which may be used in carrying out the invention. Fig. 5 1s a] plan view of a strip having thereon a sinuous record produced by the shutter shown in Fig. 4. Fig. 6 shows two additional forms of shutters which may be used. Fig. 7 shows the producing and utilizing an opaque record by. reflected light. Fig. 10 shows an electric circuit having a selenium bar therein adapted to .be 'aifectedby light from my record. Fig. 11 is a similar view showing a flat selea lens for concentrating the light from the record on it.

laterally separated by a longitudinal blank strip. Fig. 13 shows two selenium cells arranged for exposure through a' single opening to produce alternatin'gcurrent. Fig. 14

shows diagrammatically a record such as bars for producing alternating current. Fig.

17 shows a,modified form of divided shutter mounted as a key. Fi 18 is a view of another arrangement. Fig. 13 showin more. clearly. ig. 20 is a general view of the apparatus disclosed in Fig. 8 but more in detail showing more clearly the arrangement and connection of the parts. .Fig. 21' is a' horizontal section on the line w-m, Fig: 20.

Broadly speaking, this invention is'based upon the laws governing the behavior of certain substances when exposed to the action of radiant energy. The action rays of light upon certain substances producing efi'ects known as photogra not be explained, asthat method 0% utilizing radiant energy is well known.

Another mode of is in changing electrical resistance, as shdwn by the action of light upon certain substances, notably selenium, whose electrical Fig. 12 shows aphotographic pattern having records thereon may .be used either for ig. 19 is similar to the electrical connections of actinic formof record produced by the shutter shown in Fig. i

hic need 1 00 action of radiant energy conductivity is well known to be greatly increased by exposure to hght. Amorphous phosphorus is similarly afiected and other which may be emsubstances are known ThlS, 8.0131011 of radiployed in like manner.

ant energy 18 utilized for suitably controlling and varying electrical currents in different ways, but preferably by arrangm the sensitive substance in a current-contro plates being made from suitable material,-

especially hard rubber. Y Y

The invention 'sillustrated as applied to the production of sound records but it is to be expressly understood that it is not the in tention to therebyfilimit the scope of the invention to what is known'as or done by the so-called phonographs or to narrow or re-f strict the scope of the invention in any way. In carrying out this invention a record of varying phenomena is first made and said record is then used to reproduce the original 30 i phenomena.

In making the negatives as records of sound, the sound to be recorded is caused to impinge upon, a vibrating diaphragm, which is properly damped and arranged, as will be readily understood by those versed in telephony. To .the center of the diaphragm d, Fig. 1 is fixed a vertical screen or shutter s of mica or other light and stiff material, be-' ing attached by its center, and the outer] corners rounded off a little to prevent their contact with the diaphragm during'its 'back- Ward vibrations, or to the left. It projects out at right angles to the plane of the diaphragm, and in this particular form is made opaque to prevent the passage of any light through it. Fig. 2 is a vertical plan view; 8 is the shutter, d the diaphragm, Z is a powerful light throwing a beam of nearly parallel rays across to the screen or partition S, which has a long, narrow slit m in it, through which the light passes and strikes the prepared surface, which in this case is represented as a strip of sensitized paper, fed at a regular s eed over the rollers R R. As the diaphragm shutter 8 inv this form normally stands, its edges shut the light off from onehalf of the slit, and in vibrating it covers up more or less of the strip, according to the extent of the vibrations. The paper strip being carried along behind the slit m, Fig. 3, Y

the edge of the shutter will describe acurved line at the junction of the part c, not acted upon by the light, and e, which is acted upon, and by proper treatment the latter may be dissolved away or otherwise made transparling device of an elongated form in the path of the rays I on it by varythe illumlnated portion diaphragm,

ent, in any well known way, as will at once he understood by photographers.

By varying the relative distances of the light, the shutter, and the slit pr surface from each -other. the apparent amphtude of the sound waves as-reoo on the sensitive surface, can be increasedwith'out changing-their forms. This method of amplifying the vibrations is often important,' and can be applied for strengthening pulsations or variations in light-or MIMI 4311- rents, as wellsas in so mds- If, instead of an opaque shutter on the we leave .a' vertical transparent strip across said shutter, -the light will reach so he paper strip behind the screen on y through the intersection of the two in front of it, forming merely a square spot .of light, as shown by Fig. 4 at the intersection of the two slits n andm. The vertical-slit on he mica should make the light beam of about Y the same width as the stationary horizontal slit in the screen. AS the diaphragm vibrates and the paper is moved along, we produce (a ter s ing out t e parts exposed to light, blacking the rest, soaking 'in oil or otherwise rendering it transparent) a nar-v row, transparent curve on the paper strip, as represented in' Fig. 5. Instead'of the vertical strip, we may use a transparent spot atthe point which will fall on the center of the stationary slit .when the diaphragm is still as seen at n on the upper shutter shown in Fig. 4. This also makes a negative strip, like Fig. 5.

Another way is to have two shutters, one. on the diaphragm as before, only larger, and the other stationary, and parallel to but not touching it. These shutters are painted, or otherwise treated to make them opaque up to a "certain point, the rest being transparent. Y These opaque edges are notched, so that at their junction'they lap so as to form square or diamond spaces whicha're transparent, as in Fig. 6, where s is the vibrating shutter, and 8- is the stationary one. In this case, the slit in the screen before the paper strip is placed vertlcally, and the paper is fed past it horizontally. Consequently, as the movable shutter s is vibrated to and fro before the other, these transparent squares or-diamonds become alternately larger andsmaller. But

they should neither quite meet nor be 'quite or decreased, corresponding exactly to the 130 1, 9 pulsations of the diaphragm 01- the waves) not only in number and intensity,

but in the form or manerof vibrating.

It will thus be observed that the negative ma be made alike across its whole width an its transparenc variedso as to bemor'e or less opaque at di' erent parts of its length. Or an opaque strip may be slmllarly varied from white throughall the shades to blackso that a given cross-section of the strlp will reflect more or less light at different points. g

At 2, Fig. 7, is seen a fine-opaque line in the middle transparent strip. ThlS is made by placing a fine wire across the-center of the stationary slit m, to stop the light and indicate the center of the negat1ve strip.

Its convenience will be manifest. In prac-' tice the stationary notchedshutter s is not necessary, as the slit m is sufiicient in-connection with the vibrating notched shutter as seen by the lower figure in Fig. 6 which shows how the lateral vibration of the shutter with its transparent notch will vary the amount of light passing. through the stationary slit me. These patterns or negatlves,

. and others which can be made by the above described method, are suited for diflerent uses. It is evident that when a correct negative is once obtained, perfect copies can be produced not only by photographic but also by ordinary printing processes, or even by mechanical means, at a merely nominal cost,

.even for the most elaborate negatives.

Having thus explained the principles of the present invention, Fig. 8 represents an apparatus which has been devised for carrying outt-lie method and producing the record. At' A is a roll of the prepared sensi tized strip, wound upon a bobbm, which is mounted in journal bearings in any convenient way. This strip may be of any suitable thin and flexible material, which 7 may be strong fine paper, but what is known as paper parchment is preferred, although v man other substances, may be vused. It shou d be covered with a thin film made very sensitive to light, by any of the instantaneous processes employed in photogs raphy, although a dry process will be most convenient with this form of sensitized strip. After bein properly coated and sensitized, it shouldgn carefully dried, rolled up, and protected from light or damp till ready to use it. It may be thus coated and sensitized either before or after being cut up into strips of width suitable for use, but in the latter case care must :be taken in the cutting not to disturb the adhesion of the film to the strip. A suitable width is or *2 inch, and the length will of course be governed by convenience, or the choiceof the operator.

The roll A is free to turn, being held only by the spring Z, pressing upon it sufliciently to prevent it from turning faster than the stnp.1s needed. From A,'the.. strip passes over the flangedrollers R, R, Figs. 2, 3 and 8; at R is a rubber faced roller which presses the pa 'r strip between itself and R tlghtly-enoug to prevent the sli ping of the strip. It also fits between the -the' 'roller enough to carry that along If desired, it can also press lightly on the roller A, to assist in rewindi'ng the strip upon it. To this roller can be a power which feeds the strip along before the slit m in the screen. or partition S. For

w1th it.

anges of applied the v experiment, or common telegraphic pur-' poses, a crank may be attached to the roller R or R, as shown in Fig. 8, or the strip may be otherwise fed by hand. But when accuracy is required, some motor should be employed which Wlll five the negative a per fectly uniform an known rate of speed.

These are not new, and need not be deor may simply be fed loosely into the bottom of the box-or case of the phono 'aph. It will now remain unchanged, if i ept from light and damp, for days or even weeks,or, on the other hand, it may beat once developed, intensified, fixed, or otherwise treated, to render the image permanent, according to the process employed or the effect desired. All of which will be at once understood by those versed in photography, who will be enabled, from the foregoing description, to readily make a negative stri havin the characteristics required. and wiil proba ly prefer the gelatin-bromid process. If the pa er seems to have a greasy nature, it may be ore applying thebromid emulsion. be coated with a4 per cent. solution of white of egg, to which suflicient chrome alum has been added to give it a slight bluish tinge. This will insure the film adhering perfectly, but it will seldom .be required if a good quality of paper or parchment is used. These strips bein fixed, they may be treated and used in di erent-ways.

The parts acted upon by light may be made transparent, and the rest blacked and rendered more opaque, and the strip used by varnish, or otherwise, and thelig 25632.: dered transparent by dipping in castor oil thinned with absolute alcohol.

shutter is removed, The square chamber which contained the diaphragm is now Elli empty or tree, and allows the light Z to shine unobstructed-across it, to and through the slit m, onto and through the strip which,

is rapidly Lied before it, whereby the light which-passes through the strip is varied in recisel the same-manner as the original am of? light was varied by the shutter on the diaphragmd, i. 6., the greater the pro.

portion of the strip which is'transparent, the greater the amount of light which is passed through it, and vice versa (see Fig. 3). This light can now be used to produce corresponding variations or pulsations .in

sound, electric currents, magnetic attractrons, etc. as desired. This varylng hght can be converted into sounds in difierent ways.

.It may be passed through a plano convex or rather plane-cylindrical lens 10 or any suitable optical. device, to widen and disperse it'properly, and be thrown directly upon a thin, hard-rubber diaphragm l), r properly arranged for speaking or giving out sounds.- @r, in place of the lens. 39, a selenium bar or cell may be arranged to receive the light and thereby vary a current of electricity flowing through it, as shown at p in Figs. 10, 11 and 15,which current may, then be conducted to a suitable telephone,

I which is substituted for the diaphragm D,

and thesounds will be produced byit with any desired loudness. Or-the current may "be conducted by wire to any other instru-' ment' or place, in the same Way as in telegraphy, and there converted into sounds or utilized for any other purpose, as in Fig. 15, where a current from D is represented as conveyed to a telephone T at one place and to an electrical receiver of any suitable kind ,El' at another place. 7

-When selenium is used for receiving the light and varying an'electric cur-gent, it may vbe either in the shape of a'bar p covering the slit m, as shown in Figs. 10 and 15, or that of a flat-cell p in Fig. 11, where the light ussing through the negative or pattern and the slit m is converged by the I lens p to a focus, upon the selenium cell 12.

or, for producing an intermittent current it. may consist of two selenium cells or bars suitably arranged as shown in Fig. 13. The same arrangement is used in connection with teacher lacing .altemating currents or undulating patterns like Figs. 2?, l and 21.2 ct-or procurrents of alternately opposite polarity...

The two cells arekarranged end to end with their approximating ends at the central line 2 0i the pattern strip so that one cell or is opposite one halt of the slit m and the other bar or cell opposite the other half. Each cell is arranged to send whatevee current flows through rt in direction opposite to that eithe currenttremthe :othercell,

any well-lmown unsuitable manner andeach may-be supplied with. its current from different ends or sections oi the same battery or from separate batteries, as shown in Figs. 16 and '19, where the two sections of the selenium areinsorted in derived circuits or branches of the ins-in circuit to w. lin either case, the electric. current is arranged to flow through the selenium by proper conducting wires and the varying quantity or light light, and the other cell or section will be I lighted, and operated by the .tormon the opposite half of the patternstrip. A pattern like Fig. 3. orrl, however, produces the changes of strength and polarity gradually.

When designed to be used with a divisional selenium cell, the atterns should, of course, be made by a divisional shutter on the diaphragm, as shown in Fig; 16. In using such a shutter to produce negatives, it should be arranged so that the central vertical line or division of the shutter will fallen the cen: tral line of the slit m, whichshould also be made preferably in two parts in difierent planes, as shown by the position of? and r in Fig. 16 or 17. When arranged as in Fi 16, the oqaque art 8 of the shutter stan s between the lig t and the party 1 of the slit and S covers up the slit r, as will be understood from Fig. 18, where theparts areso lid arranged. Now, when. the shutter vibrates to the right,-s' uncovers more or'less of slit r, and when moving to the left, the part 9'' of the slit 1s similarly exposed by the removal of S. The sensitive surface eing fed down past the slit, a pattern is produced like Fig. 3 or 7 but with the two halves in dependent, and possibly, dissimilar,--each corresponding to the movements of its own I half-of the shutter.- By now moving this pattern (when finished) past the slit again after arrangmg a sectional selenium cell beh nd it with each section of the selenium belundthe corresponding section or the cell of the way) we shall produce alternating mg precisely the same as durm a where currents whose variations in strength and olarity will correspond to the original v1- rations of the shutter and, therefore, .of the force which moved itt he principle in:

volved in making and using the pattern bea ready described. Iwould here remark that the method of constructing selenium cellsis now well under-.

stood and any known or suitable method or;

arrangement may be employed.

By arranging the dlaphragm d, or its shutter s, to be operated manually, feedmg the strip slowly and vibrating the shutter in a manner similar to that used in sending the ordinary Mdrse signals with the ordinary key, the result would be a strip hke Fig. 12, with transparent lines across 1t. The shutter can, of course, be actually arranged on a sort of key andbe vibrated manually before the slit m to intercept the li ht pro erly. Fig. 17 shows this dev1ce gapted or producing-alternatin currents. The parts 8 and s are-opaque, the rest of .the shutter transparent. The black bodles r and r represent the two sectionsof the slit m which are normally covered or protccted bythe opaque'portions s and 8'. .-But when the key K is operated to move the shutter to the right it uncovers the sect1on r, and vice versa, thus producing the pattern precisely as alread descr1bed,.only t.

is now done manually mstead of automatically. By arranging the shutter like Figs. 4 and 18, to be moved in both directions from the center and to difier'ent dlstances for the different letters or 81%}315, a strip like Fig. 12 would be made; 1g. 18 shows the key or lever K for movm the shutter, the proper distances belng 1n mated by the scale y. The springs 3 3 keep 1t normally in its central position and when moved to either side it uncovers one of the sections of the slit m precisely as descrlbedfor F g. 17 and the further the key is turned on its central pivot the more of the shts or openings are uncovered by the shutter and the reater the len h of time that the beam of l ight will be a1 owed to pass through to the sensitive surfaces behind the slit. Such a strip prepared in either way can then, be run through my instrument at almost unlimited speed and the s1 fectly produced by the light being var1ed its passage through the strip and, then alling on two selenium bars or strips or other current-controlling devices arranged behind the slit m, producing correthen sent over the line or other currents induced by them sent instead tov anotherphonograph or'to one of my telephones or other apparatus as shown at El in Fig. 19, is the pattern or strip moving past als will be perthe slit m in the partition S, and r and r represent the two sections of the slit with the sectional current-controlling device arranged behind it-each section, when lighted, sending a current of opposite polarity through the circuit. When the speed is so eat that the sounds or'signals are unintel 1gib1e to the eye or ear at the receiving station they may first be recorded by one of my phonographs and the negative so prepared be then run through another phonograph, (or telephone), at the ordinary speed.. In this way, the line wire can be utilized to its utmost capacity in speed for slit m transversely instead, of lengthwise of it as it would appear to be in the drawing.

m is the narrow slit long enough to cover the length of the two selenium bars p and g), each being inclosed and protected from all light except that which passes through the slit and the negative strip P. Each bar has proper wires to conduct the current throughit which are so connected up that each bar directs the current which flows in 'it through the line in an opposite direction,

and their resistances are such that no current (or a very slight one) flows through either of them as 1on as they are kept in the dark. But immediately that the.nega tive strip admits light to either bar, its resistance is-lessened and the current flows through that bar to the line or to the primary 'coil of an inductorium which sends the induced current to line or to any other device as the case may be-the strength of the current being in proportion to the portion of the bar, thereby exposed to the light. The electrical connections are, as more fully shown in Fig. 19, or they may be arranged in any other suitable or well-known manner.

The longer the transparent part of the strip I or signal, the more of the baris lighted up,

and the stronger the current which flows through it. When the other bar is ill'uminated the same efiect is produced but the current is sent through the line or circuit in,

the opposite direction-all of which will be readily comprehended and efiect'ed by electricians. y

When using an opaque strip or negative, the sound waves, or,.rather, the variations of light produced by them are recorded in the same way as already described. But to reproduce those variations the strip is fed along with the printed or formerly sensi parent pattern and so directed toward the strip that only the light from that part of the strip Which would be covered by the slit m can pass through both aperturesall of which will be readily understood by photographers. This light is then received by the lens or other suitable optical device p and properly thrown upon the diaphra' D as before orthe lens 11 may be replaced by the selenium bar or cell and the diaphragm D by one of the telephones, etc, exactly as before described for transmitted light. The distance or the illuminating arrangement from the negative strip is merely sufficient to thoroughly light up the field covered by the tube 5.- Tubes 3 and 5 may be of any'suitable'size, length, and material, all of which maybe left to the judgment of the operator, who should arrange the apparatus according to good photographic practice.

Fig. 20 shows the general arrangement of the apparatus in more detail than Fig. 8. El represents an electrical apparatus capable of vibrating the diaphragm D when a telephonic, telegraphic or-other suitable current is passed through it and thereby vibrating the shutter s placed in the path of the beam of radiant rays from Z here shown as an electric lamp, and thus varying said beam in accordance with the extent and character of its own movement.- The beam thus varied is in the first instance thrown upon the sensitized strip P fed down from reel A over guide roller R'before the o enapparatus El is moved back far enough to take shutter 8 out of the beam of radiant rays which then pass through the negative and are varied thereby as they had been previously varied by the shutter s, after which they fall upon a selenium cell or other suitable apparatus 72', all .as heretofore. explained.

Fi 21 is a horizontal section through the lines ww of Fig. 20, showing the li ht and lenses l, alum cell 2, shutter s, cylin rical lens 77 whichv converges the light laterally to a long narrow streak where it s nearly parallel.

essence through-the opening at to strip The 'niatically start off the strip P when the phenomenon eccursgwhich is to be recorded.-

Theshntter s is caused to vibrate, as already stated, and thereby uncovers the cell gr",- al-= lowing the light which had previously been stopped by. the shutter to fell upon the cell and by increasing its conductivity anelectrio impulse is sent through the starting magnet Thisimmediately pulls up'the armature and lever L and raises the pav'rl' which had previously held the reel A! whereupon the reel is suddenly revolveol' and draws the strip P past opening on until the sound or other phenomena ceases, when the shutter becomes still, the current substanti-ally ceases to flow through" the cell 39 and magnet M, the lever L drops and the reel A is stopped. When reproducing the recorded phenomena the lever L is lifted manually by a cord a; running over a pulley through an aperture to the outside at some accessible point, where it can be pulled when desired. The current oftl're cell 19*. can also be sentthrough induction coil l nd transmit the message if" desired to a telephone T at the same time that it is being recorded on F. i

The light employed for making the negative should be strongly actinic, and may be direct sunlight, or electric or other artificial light having suiiicient actinic power for"instantaneous photography. It should be an reflector or other means ior making therays At 2, Fig. 8, they pass ranged in a chamber preferably with a through a glass'cell filled with alumwater,

to stop the heat Without diminishing the light. They then pass through an aper .ture of suitable size, across the diaphragm chamber, where they are-manipulated by the shutter s, and through the slit m, as already described. For using the negative, so strong a light -w ll' not alwaysrhe needed,-

and a good kerosene lamp answer for Gas light is not most ordinary purposes. suitable, unless a steady flame can be ob tained, as a; flickering light 'will interfere with the perfection of the speaking; For purposes requiringaecuraey. however, a light should be used havingh'ample actinic Ig ower, and the stronger t e better. vNo

arm can be done by having alight unnec:

essarily strong as it cannot be strong enough to do any harm.

Having described the invention what I claim and desire to secure Letters-Pat ent iS.

1. The combination with a movable sensitized surface, of means for moving; said sur ms with regal-n timing, means for-em posing said surface periodically to light on different sides of a longitudinal line to produce photographic effects thereon in two adjacent rows.

2. The combination with a camera. of a movable sensitized surface therein, means for moving said surface with regulated timing,.shutter mechanism to control: the admission of light'to different lateral portions of said surface, and means for operating said shutter mechanism to form on said surface a plurality of longitudinal .laterally separated records of variations in light.

3. An apparatus for taking photographic impressions suitable for reproducing in proper sequence and with proper timing variations in light due to changing phenomena having in combination a camera, a single sensitized flexible strip therein, means for moving said strip. with. regulated timing, and means mechanically controlledfor admitting. light to laterally different portions of the strip to form-separate longitudinal records on the same strip.

4. An apparatus for taking photographic impressions suitable for reproducing in proper sequence and with proper timing variations in light "due to changing phenomena 'having in combination a camera, a single sensitized flexible strip therein, means sensitized flexible strip therein, means for.-

moving said strip with regulated timing, a

divided shutter for separately controlling the admission of-light to laterally different portions of said strip toform two photographic records thereon, and means for operating said shutter.

. 6. A record of variations in light capabl e of use in reproducing those variationswith proper tlming consisting in a surface having thereon a plurality of photographic records of variations in light side by side and in proper sequence.

7. A record of variations in lightcapable of use in reproducing those variations with proper timing consisting in a surface having thereon two longitudinal rows ofphotographic impressions of variations in light in proper sequence with a blankspace between said rows.

8. A record of variations in light capable of use in reproducing those variations with proper timing consisting in a surface having thereon two longitudinal rows of separated photographic impressions of variations in light in sequence taken in rapid succession with proper timing.

9. The method of recording successive variations in light, which-consists in moving a sensitive surface with regulated timing, and taking two closely adjacent longitudi nal rows of photographic impressions on said surface.

10. The method of recording and reproducing successive variations inlight which consists in taking two longitudinal slightly separated rows of photographic impressions of variations in light in proper sequence on a single sensitive surface developing and producing from said surface a permanent record and projecting light modified in succession by the impressions in said'rows on said permanent. record to a receiving surface with proper timing to reproducethe original light effects.

11. The method of recording and reproducing successive variations in light which consists in taking two longitudinal slightly separated rows of photographic impresslons of variations in light in proper sequence on a single elongated flexible strip having a sensitive surface, developlng said strip to fix said light effects, projecting light through said strip to a receiving surface modified in accordance with said photographic impressions in the -.two rows and moving said strip with regulated and proper timing to reproduce on said receiving surface the original variations in'light.

In testimony whereof I afiix my signature' in presence of two witnesses.

JOSEPHINE H. FRITTS,

Administratriw of the estate of Gharlea- Edgar/r Fa'z'tts. "Witnesses:

GEORGE L. GIBBS, FRANCES E. Fnrrrs.

Images