US1789687A - Analyzing system for multiplex facsimile transmission - Google Patents

Description

Jan. 20, 1931'. RH ER 1,789,687

ANALYZ I NG SYSTEM FOR MULTIPLEX FAG S IIIILE TRANSIII S SION 'Filed Ma's 5, 1929 0 JAM/Hm INVENTOR RJLMNGEK ATTORN EY 2o ping disk for visledwith V the periphery t pmjm w of) IRICHAEDI nnd fifneans; for {controlling light and' i'i'e es:

'ticles,"moving fact all types of Subjects wheifeifi' a; ivis resentation of the ubjeotinzitoef is to be reproduced at the receivingpoint? the? ligh tTchoppmg f mi on or multiplex,

i I "Another 0b light clioppin 7 (liming either mane-pr Tier-frequency clifeotly'fro i =jotecl conneoti t'lfiough "a" 'pict pe, in] 001111) tion with? film i tita nsmission. v

fi bWLAiTDpBLANGEE or ,Imwmm NE iii 11 1515 lose of aiipro'x imgtely soqg bf 'tlie 1 "availableeliminated and by mea s of which 1 oan The pi'esent im entionfeliiitesyoo fa metli'oa 'peoially applioablf find "Y adaptedlioj sywin usedfin the tr'an'sniiesioniof pictures anclqthe like rfojr' 'faic simile' 'a-nd "television W'Oik. f :By the fterni fpict ures fif of? course; I e n to in} elude the tfansmisio views,- printecl ma te 'fter, bhecks, fingerp iifs; photographs"; nzmc'ia l" stat ementsg-"neivs'papef articles; (1'; rangement of'pz gtsgj I VertiSemen t-S; fashion plates I mega'zii eas1ly= rotated wltliout" lie' I need% pictures; 3nd i 't l ie 'like entire amount of light ia'xfailabl at all times. 3 Still other obj eots of; myfinvention are to provide in z r'zina'nneffio Lbe llereineift'er set "forth, v a light ohopping diski arrang ment r f'i l 1: Hal-repansrnitte'tl f of existing apparatus using ohopping d isks 1 -fori-tl e'ipunpos'eof i -frequencies. i

the invention is"' relateol further l exfeloprnent of disks arfangenie'nt" set forth avncloliimed in inyoop'en'cling efpplic'atio'n, i Serial No.; 349,076, firedvimirgcir 22, 1929, wherein I'ha Ve "(lifslos e'cl i light' ckiopmed entiielyzaof glass la l ldfplfp shaped 'notcheseXte'ncli-Iig bout membe a single traokyoi 'in 1 concentric tmok'sfolep'ending, of

I More paiti'ciila'rly; too modification and th6afoll6yvihg speoifioafiion gnoli claii rnsxin Cori- Fig; 1 foon v'enplonally illustrates; Fa n lair} rangement jzforz -lmpresslng l1 Se, upon-Whether theis'ystem isft-o' be' used nlneo tion with a," nglefchanneli'transk ansmissionm i=1 7 t jinventionis to pr 9," cp mp $116. fi fd h" QElQGtIflO membere; and,

Fig

:- 12 illustrates ll :cationisystem',for example-:1

Referring no ixto thfe clravvin'gs: par-i? of; my present disclosure; and i j par- "-ticu'la'r; to Fig.;=vlthereof, light produced at source @1, ma j--1be directed tbrought a; lens xsy stflin' or thefiequiva'lent; l 'SllChjifiS iai 'lens forifmirrontqdiskj {5i 191011117G Or television surface; 5. from-which the 11 ht; beams maybe; reflectedi allongr'the paths :7 i and 9 Tespectively .1('oonsideringthe on" opaque tli'ansmissiomfl or 'e't of my 1 invention is to pi ovitle a-fclisk member for prodlioing: ait one or carrier i're uemy hich is] relatively simple in its construction and; aiireixigemen t and {a I lisk which w(22111 loe'--ma nniiactu 'e(ljapnd prot o r I @(119, ere fji'efleotecl; f riom the-i icti r j or r "S t ll}. a, further. objec of y inventionis'io .teleyieion Jsur'fzioe;5%tlie3? be; passed" provide a metallic-H itng'eihent fof prm through a film Mm 11 a. ir uw in :Whigh dividllalib :System which isj lreadily a plied to all" ,rbiii i wi Celine? ,1nvennee suggestthemselves:and be :l-comelaparenqito those skilled in the-art' to which" the ifiizhtiQn relates; by 'ons'ider'ing nectloili mth' sthe. acFlQmpallyllilg"idfawlng; e

i i -e preferred: typs"oflhghfichbpping disksgea sfl zapp ied lio 'a two ha l lel' multipileioc m orm n J communication isyste'm) ."Asthe light beams lens system ll froin' Whioh in-.

makeneeofubstantieilly-tthe"i z diaphragm so as to separatethe reflected light from the picture or television surface phragmrmember 13 provided with openings 15 and 17 therein. The diaphragmconstruction may be of the general type described and.

claimed in my copending application, Serial No. 321,821, filed November 26, 1928, Wherein, which should preferably be of a square formation, although this is not essential but merely for simpl city of illustration, may

be made larger or smaller by adjusting the 5 into two independent" and distinct paths" of light so as to scan more than a single unit area of the picture or television surfaceat theisame time. As thelight beam. passing through the diaphragm has beens'p'lit into two independent and distinct paths of light right angle prism 19 and deflected by the'surface 21 thereof so asto' follow a path through a" focusing lens system 23 formed preferably of. a plurality of lenses '25 and 27. .As the light beams leave the }lens=syste m 27, they I .are then preferably projected upon a disk copper, for example, laid out inadesign laboratory whereadisk maybe drawn out curately divided; into spaces, holes or aper tures of equal size, so that thedrawing may" copper plate forming the 'surface29 havinga plurality ofapertures,

slots, or holes, 31 "arranged in separate and distinct paths 1A and B respectively, assum ing the system to be a two, channelmultiplex communication system t y a a It will be seenby'looking at the drawings thatthetwo paths A and B formed by the apertures 31 onthe disksurface 29 are each of a; different number of, apertures. These paths may differ in the number'of holes therei in by any predetermined and chosen amount,

as was disclosed in connection with the V- sbaped grooves. forming the plurality of separate and, individual :tracksin connection with; the glass disk arrangement set forth and claimed in mg above referred to copending application, erial' No." 349,076, filed March 22,1929., The surface of'the disk 29 provided with theopenings or apertures 31 therein is preferably-formed fromiqa light metal such as 'and may be accurately on paper andmost' acbe placed in the hands of a photoengraver who may then make a photoengravin'g on-the disk and thus make it as, accurately aspossible. The copper plate photoengraving,

may thenbe cut down so, that at the points where the holes or apertures are intended to be placed inthefdisk, itwill be very thin, and then by approximately coating the .en-

tire copper'plate with wax andvmaking a the holes may be cut through the disk by the usual photoe'n'g ravnamed copendi-ng applications.

ing or etching process. Also, a disk may be formed by appropriatly punching theholes therein. After the disk has thus been prepared and the apertures or holes 31 formed therein, the disk is polished and preferably plated with a highly reflecting substance,

such as, for example, chromium or silver.

It will 'now be seen that as the two light beams 7 and 9 are focused respectively upon the tracks A and of the disk .29 and with the disk rotating fin the direction shown by the arrow thereon, rotational movement being derived from the supporting shaft 33 turn'edibymeans of asmall electric motor 7 or an air 'turbine, for example, the light projected along the paths and 9, will, at pre-- determined periods, pass through the holes or apertures '31 in the disk 29 and at other periods be reflectedfrom the surface of the t diskbetweensuccessive apertures.

7 and 9, it may then be projected through a- As shown by Fig. 1', he light which passes through the disk 29 may be directed'to a prism 35 andreflected from the face 37thereof as two independent .pathso'f light 7 and 9" to a photo cell 39,- and, similarly, light reflected from the surface of the disk 29along hotoelectriomember 41. As was 1929,, eachofthe photo cells 39 and41 may be of the elon' ated type so that they may simultaneously e influenced by lightpassing through each of the separate and distinct paths A and B on' thedi'sk member 29. These cells39 and 41 may then be connected with a transmitting circuit in i a manner similar to that disclosed-in the last of my above While I havedescribed myinvention parfltitcularly as being adaptedto two channel.

multiplex communication systems, it w ll readily be seen that the invention is likewise applicable to a single channel communicate tion system provided that only one path of apertures 01' holes inithe disk29 is utilized, 7 which mightbe produced, for eXample, -bycove-ring one'of the diaphragm openings'15 or 17, or by making the disk 29 with only a.

single-iti'ack'of holes therein, or,'in a imt .-lar manner,'the s stem may be adapted'to practically an infi nitejnumber of separate :and distinct channels-by providing-a corresponding number of: openings in the 'dia-. ,phragm 13 and making the disk 29 w th a correspondingnumber of separate and distinctpaths of holes 31therein,"in' which case, each of the separate paths on the disk will be v composed of a different number of apertures, so that the rate of. chopping the light for each, of the separate and distinct paths differs. It

is, however, preferable to have the number ofholes in the diski29 such. that due to the, speed of rotation of the disk; and the number-f corresponding to: some 'predetermin'edlharcated at the recelver usedzinconjunction' vvith v a multiplex system of the -type herein dis I closed so that the separate and individual tones or carriers may be theredistinguished; Having thus described my inventiomit will;

"monicof'abasicchosen frequency upon which I v 1 x, the entire system operates." This'tends to provide asimplicity of opera-tiom; lHoWever, it is notnecessary that the number ,ofholes be such that the, light is choppedat any predetermined harmonic,of anybasics'or" chosen frequency but the chopping'may-bepro ducedf-at any chosen ldesired vrate pro- Hvidedfofcourse, that suitable filters are lo 7 become apparent that various modifications such modifications fall-*fair'ly Within the spirit and scope of the invention asset forth Gl GCtIlC mBELIIS POSltlOl'lQCllIl' front and bej hind said disk, and means-provlded by rotat- A g ppgdisk ng Edonc} c I 'tricallyi-arranged row' of apertures adapted P v to'passlig ht, andl'a'light reflecting material on the disk surface between said apertures. 51 j, 8. ,A light choppin'gg disk having 'a' plu-I 7 picture surface,

' path of may be made therein,la nd I, therefore, believe myself to be entitled to make and use each of these modifications such as w'ould become: 1 obvious to one skilled in the'art to which the invention relates provided, ofcourse; that by thehereinafter appendedfclaims 7 Having nov'v described my invention, What Iclaim and desire to securebyLettersPat-I entis the following: Y 5' '1'. In 'a' -'picture transmitting system, a sourceof light for. illuminating a picture sur-v face, means for separating the light reflected from the picture surface into' a plurality of a distinct and independent paths corresponding in number to the number of channels in the communication system, a disk having arranged about the periphery thereof a plural ity of independent and distinct apertures? means for successively and alternately pro jecting light through the apertures of the disk and reflecting the'light from the space between successive apertures in the disk, and 1 t 11 ;'t' "h' tl f a c.

L pho 0 08 loned'm t O 6&0 tating disk provided with a-plura hty of rows of independent and distinct apertures ar-g. j i rangedfin concentric paths about-the periphery thereof, me'ans for sequentiallycproof said projected and reflected paths of light; P 2. .In a multiplex communication system,-

alight chopping disk having a plurality of zconcentrically arrangedwlaperturesextending about theT periphery thereof and-the space V between said aperturesjb ing highlyxreflect-f ing, means for projecting light a a plurality of light beams against each independent apertures "on said-disk, and photoing said disk for alternatelyand. successively subjecting the photoelectriczelements to dill" 3. In a picture transmitt ng system, a

source ofli "ht for illuminating picture sun] 7 c c V ertures each adapted to pass llght, and a light t freflecting material on the diskcsur face between successive apertures" of each of the 1- face, means for reflecting'saidjlight from the linfront and behind said disk, and means 'p'rovidedfby rotating said disk/for alternately I v I j and successively subjectingjthe photoelectric 1 elements to direct and reflected light pro-, ,7

a disk' j having i'arranged about the periphery thereof a! plurality of 1 n independent and distinct ap'ertures, means for successively. and'alternately-projecting, said reflected light, through" the said aper reflec ing theligli cc-es" ve apertures -1n ingiaplurant ng light as a 1 v s t f ight *b s' against each iI'iIdep endent *p'atho'f apertures on said j disk, photoelectric means positioned jected upon said rotating; disk 5. In a picture transmitt ng source of light for illuminating av picture surface, means for separating the light reflected T f f-romlthe picture surface .into' a plurality of distinct and independent paths correspond-u i I in in number tothe number of channels in the" communicationsystem, a disk having arsystem, a

ranged concentrically about the periphery thereof a plurality Ofindependentand dis} tinct rows of apertures,'means. for succe s-" sively" and alternately projecting Q light through thesaid' apertures in said'dis-k'and v I reflecting the light from the space between j successive apertures vin said disk, and aphoto.

projectedand reflected paths ofilight I 6. In a ipicture transmitting system, a

source of light for illuminating apicture j surface, means for separating the light re:

cell positioned in the'path of each. ofsaid v i jectingsaid plurality of light beams through.

and reflecting the light beams from the space rality of concentricallyarranged rowsof aprows. j H c. 9.:In a picture transmittingsystem, a

between the successive apertures in-the disk, i v

and a photo cell positionedin the pathf'of eacllli of said projected andreflected paths of lig t."

qsurface, alight chopping disk havin a, c01 1- \said disk for alternately an suecessively di e ecting the light reflected iromthe picture Q I fsurface through and fromthe surface of said sqas t0 841ternetely influenceeaeh Of said slight translating elements. V RICHARD RANGER.

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