US1445031A - Tape sound record - Google Patents

Description

Feb. 13, 1928. H. L. PAGE.

vTAPE SOUND RECORD.

ORIGINAL FILED sEPT.12.192x.

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TAPE SOUND RECORD ORIGINAL FILED SEPT. l2, 1921- Feb. 13, 1923.

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HOWARD L. PAGE, orcHrcAeo, ILLINOIS.,

TAPE SOUND l RECORD.

originar application inea september 12, waiyseiiai No. 500,012. 'mvide and this' application mediriay 411,1922. Serial No. 560,221.'

To aZZ whom t 'may concern.'

Be it known that I, HOWARD L. PAGE, a citizen'of the United States, residing at C hicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Tape Sound Records, of which the following is a specification. i

This' invention relates to machines of the phonographic type for reproducing recorded sound.

The object of the invention is to provide -a tape sound record usable in reels, like a motion picture film, for the purpose of being passed through a machine which will operate on the'record and thereby produce in audible sounds the same sounds which were originally spoken into a recording machine. The device of this invention is-primarily designed for use in the machine of my prior application, Serial No. 500,012,

filed September 12, 1 921, of which this is a division.

rihe object of this invention is to provide a record of this class which can be easil made in the proper machine from whic commercial duplicates Ycan be readily madev and which will in service accurately deliver I to the reproducing machine the exactvibrations originallyrsent to the record through the recording machine.

The invention consists in mechanism for attaining the foregoing and other objects and which possesses the special features and details lwhich willbe hereafter more fully set forth in the specification and claims.

In order to fully disclose the record of this invention, the drawings and specification will fully set forth the method of manufacture of the record from an original photographic negative produced by' sound waves entering the recordingimachine of said prior application Jand the apparatusy for using the record inthe reproduction of sound.

For the purposev of insuring identity of this divisional application with the originalapplication, Figures 12 to 27 of the original application are here reproduced with only the numerals indicating the figures properly reduced. All lettersof reference are those of the original'application.

Referringto the' drawings, in which like numerals designate thefsame partsthroughout the several views:

Figure 1 shows a piece of a record film produced, for instance, by the machine'lof `said originalapplication and indicates Ythe manner in' which a pointed pencil shaped f b eamof light, fullydescribed in said appl-ication, has operated to produce an accurate sound record on the film.

l Figure 2 is a sectional detail view on the line 2-2 of Figure 1 of the first sound photograph as actually'produced on the film of the machine.

Figures 3, 4, 5, 6, 7, 8, 9, 10 and 11 show succcessive steps in the method or process of converting the undeveloped film record of 4Figure 1 into thecommercial record of Figure 11, Figures 6 and 9 showing mechanical means for treatlng certain of the lntermediate records; F1 ures 7 and 8 being sections on the correspon ing lines of Figure 46 and Figures 10 and 11 being sectional views on correspondingly numbered cross .lines of Figure 9. N t Figure 12 shows the reproducing machine by which a commercial sound record of the type produced by the machine of said prior application is used to reproduce the original sounds. This figure is a side view of the mechanism of'Figure 13.

Figure 13 isa plan detail view of the mechanism of Figure 12. I

Figure 14 is a detail of the pivot'mechanism for the record reproducing bar taken from approximately the points indicated by the arrows at 141-14 of Figure 13.

Figure 15 is an-enlargeddetail view of the reproducing bar showing the manner in' which it contacts the reproducingrecord in transmitting what Ais jon it `into audible l l parts, 176 the unexposed pant'swand '172 the juncture between them, and desired -t-o'produce the product of *this invention, the operaftor now takes undeveloped-film 54, Shown i'n Figure 1g and gives it' an-ordinary photographic'development, as shown in exaggerated*l section igi Figure2, viz.: a film body a 54, an exposed or opaque portion '174, and a clear portion 176 of the same thickness as the opaque portion 174. vrll`he two portions 174 and 176 contact each other in line 172. rllhe operator now takes this developed film and turns it top for, bottom and applies it as shown in Figure 8 to another parallel second film body 178 having on its lower surface` which is not in contact with any part of the first film, a coating of a gelatin emulsion sensitized by the use of potassium bichromate or other suitable alkali bichromate as well understood in the photographic art. 'l`he operator now prints in t-he ordinary manner from the top lthrough the two films 54 and 178` with the result that portion 180 of the gelatin emul-sion which is below opaque portion 174 of film 54 is unaffected b v light aud will wash off, while portion 182 of the gelatin emulsion which is below clear portion 170 of the/film 54 is visibly and actively affected by light and therefore caused to adhere permanently to the film 178. very important feature occurs at this point-the gelatin emulsion portion 182 is affected by the light along its height in proportion to the nearness of the portion affected to the light. in other words, the upper portion of the emulsion part 182 which is on top as viewed in Figure il and nearest the film 176 is more forcibly affected by the light and therefore most actively caused to'adhere to the film 178 while portions lower down in the coating 182 are less actively affected by light and the lower portions at the bottom may not really be affected at all` but be the lat-- ter as it may, the factl that the emulsion is on the bottom of the'fihn 178` when printing takes place. insures that this printed section 182 will closely adhere to the film 178 and not wash away when the operator places the printed film n178 in the bath 184 as shown in Figure 4. ln this bath 184, all of gelaitinized portion 180 washes away and possibly some parts of the bottom portion of' gelatinized printed portion 182 wash away leaving the film 178 when it is turned over from the bath position, as shown in Figure 5, with gelatinized member 182 adhering thereto and the rest of the film clear.

Gelatinized member 182 is in avery soft swelled condition due to the fact that it has just been in the bath and it is capable when it dries of shrinking to the form. 182, Figure 8, where it is too thin for actual use as a sound reproducing record and it is therefore necessary to make another film while the gelati'nized record 182 is still swelled. This is accomplished by placing the lm of Figure 5 in the machine of Figure (i and forming thereon the third record.

The machine of Figure 6 includes a delivery roll ,186, areceiving roll 188 for the film, a table 190 over which the f ilm passes,

Laaaoel ' adjustable trough edges 192 and 194 between whlch the film passes, a heated material tank 196 warmed by the electric coil 198 delivering record material through a spout 200 y onto the table 190; a scraper' 202 adjustable vertically on a rod 204 by means of a set screw 207. r1`he table may, if desired, be provided with a cooling coil 206, to keep the parts at proper temperature.

1n the operation of this machine, the film body 178 and soft spongy gelatinized member 182 is passed over the table 190 between the members 192 and 194 and under the spout 200. Tank 196 is filled with a material which when heated can flow down onto the film 178 on table 190 and fill up the space at the side of gelatinized'portion 182 'without injuring the gelatin. 1t should also be a material which when cooled does not materially shrink and which is hard enough to stand the forming of a final record from it when it is again run through thel machine of Figure 6 or one similar thereto as shown in Figure 9 for this purpose. Such a material is found to ,be gutta percha and wax and asphaltum in approximately equal parts. 'llhe asphaltum makes it set when cold, the gutta percha makes it flexible and the wax gives it body andholds the other parts together. As this material passes down the spout 200 onto the table it fills in the space on the film 178 not occupied by gelatin member 182 and forms the record 210 appearing in Figures G, 7 and 8,"

andy adheres firmly to the film 178. As the product of' the machine of Figure 6 is wound onto the reel 188, the whole thing dries and gelatinized member 182 shrinks down to the form 1823, heretofore referred to` leaving the unshrinkable member record 210 as the. outstanding feature of the film. This recordjust described and shown in section in Figure 8 is kept as the master record from which reproducing records for use in a reproducing machine may be made when and as desired. When it is desired to make such a reproducing record this master record is run through the machine'of Figure 9 which differs only from that of Figure 6 in that additional film carrying rolls 212 and 214 are provided above the machine, said rolls being adapted to have gummed paper 216 pass from roll 212 to roll 214 over a suitable moistening roll 218'and thence' over a pressing roller 2,20 locatedjmmediately above the tab-le 190 where it can force the paper 216 into contact withrecord member 222 formed on the table by feeding a mixture of'liquid Celluloid from tank 196 down onto the moving film 178 and between record 210 and the guide 194. 1n other respects, t-.he machine operates just as the machine of Figure (i does, the operator-if he likes-manipulating a rolling pin 226 to be sure that the Celluloid material 222 accurately fits into place in register with the record 210. When the-machine carries the gummed paper record 216 down into contact with the moving film 178 .carrying the Celluloid record 222, the paper adheres to this Celluloid 222 and forms the finished record 4from roller-220 lto roller 214.

This finished record has a very hard and strong record portion 222 of Celluloid and a very light and inexpensive carrier portion 216 of paper. It can be readily replaced without much expensey by\ running the same Celluloid or other Celluloid through the machine of Figure 9 in conjunction with the record 178-210.

In the whole productive operation, the only point requiring excessively competent high skilled labor is the making of the one master record while the gelatin portion 182 is spongyyat all other points, everything is hard and accurate and it is not easy to have f trouble.

When it is desired to use the final record 222-216 to produce audible sound, it is run through a reproducing machine of the type shown in Figures 12 and 16, inclusive. A preferred form of the device is shown conventionally mounted inside of a case 228 provided with recordV carrying reels 230 and 232 between which the record may be passed over driving rollers 234 suitably power actuated and an intermediate roller 236. At one side of the case there is a large opening 238 'over which fits the resonator 114 heretofore referred to, differing from the one of the producing machine only in that an ordinary reproducing disc 240 of'metal, mica or any other commercial form of material is substituted for the one yof gold beaters skin 120 heretofore referred to. y This resonator carries a frame 244 similar to frame 132 carrying soft rubber pivot bearings 242.between which is journaled a. shaft v246of a reproducing rod 248 adapted to transversely ofthe record 222216I and com! pletely across it andthe lrecord is located /near the end of the rod so that there is ample opportunity for the rod to follow all4 of the small movements and variations of the. cnrved line 172v as the record passes under jthe rod thereby insuring transmission of those variations from the rod 248 through a connecting rod 252 attached to the diaphragm 240 with the resultY that all thev variations in the record 222 are transmitted to the diaphragm and consequently into the air as sound, such sound being, because of initially delivered into the resonator 114 of the receiving machine.

Particular attention is called to Figure '15 which shows exactly how the rod 248 travels only on'the edge 172V of record 222 as dis- .\tinguished from contacting the upper surface of the thickened portion 222 and thereby insuring that the record indulations of line 172 are all accurately transmitted to lthe reproducer.

It is, of course, to be understood that. the markings of line 172 in the various drawings are very much exaggerated forI purposes of illustration'but records made by'this method do in fact vary in the same way that they are illustrated and the'machine does produce in actual practice the sounds recorded.

Figure 16 shows a modified form of construction in `which the reproducing bar 248 instead of operating directly upon the diaphragm 240, operates in conjunction with a transmitting magnet 254 connected in circuit through the wires and electrical mechanism 256 with a reproducer magnet 258 adapted to operate the diaphragm 240a of a distant resonator 114g. Under this construction the members 240a and 248 may be miles apart without affecting the' result.

Attention is called to the fact that the point 168 in thepartition 64, never under any circumstances leaves the film thereby insuring a line 172 of some sort always on the film; The Aslot 144 is made of such a length that regardless of the variations in the position of the point of the pencil on the film the lighted portion valways extends to the lower edge of the film as illustrated in Figure 1 with the result that the light af# fected area 174 always extends solidylyto the edge of the film thereby insuring a solidly and completely'exposed area 174 on that side of line 172.

By] the use of the pin slot connections resonators carrying different sized diaphragms 120 may be substituted one for the otherrif desired to vary the amplitude of the vibrations of the diaphragm and conseuently the amount of vertical vibration yin t 'e line 172 of the record.

Having thus described my invention, what l I claim as new and desire to secure by Letters Patent is: w

1. As an article of manufacture, a carrier formed with a flat surface, having thereon a raised portion, vsaid raised portionl having sound record indentations in one edge and extending'in varying Widths cross-Wise of the carrier, the portion being of sulicient and extending in varying widths cross-Wise of the carrier, the portion being of suiicient height above the strip to mechanically afect a transmitting device engaging said indentations.

3. An article of manufacture, a carrier formed with alat surface, having thereon a raised portion7 said raised portion having sound record indentations in one edge and extending in varying Widths .cross-Wise of tions can mechanically affect a lever pivoted at one side of thel carrier and bearing on said indentations.

4. As an article of manufacturga carrier formed with a flat surface and having thereon ay raised portion', said portion having sound record indentations in one edge at right angles tothe surface of the carrier and extending in varying Widths cross-wise of the carrier, the .portion being of `suliicient height above the strip so that the indentations can mechanically affect a lever pivoted at one side of the carrier and bearing on said indenta-tions. f

lin Witness whereof, l have hereunto subscribed iny name.

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