US1468542A - Copying telegraph - Google Patents

Copying telegraph Download PDF

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Publication number
US1468542A
US1468542A US476002A US47600221A US1468542A US 1468542 A US1468542 A US 1468542A US 476002 A US476002 A US 476002A US 47600221 A US47600221 A US 47600221A US 1468542 A US1468542 A US 1468542A
Authority
US
United States
Prior art keywords
light
mirror
rays
lens
slot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US476002A
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English (en)
Inventor
Petersen Magne Hermod
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DK31579D priority Critical patent/DK31579C/da
Priority to DEP41885D priority patent/DE418329C/de
Priority to CH97549D priority patent/CH97549A/de
Priority to GB1133421A priority patent/GB165074A/en
Priority to NL19303A priority patent/NL11019C/xx
Priority to FR535138D priority patent/FR535138A/fr
Application filed by Individual filed Critical Individual
Priority to US476002A priority patent/US1468542A/en
Application granted granted Critical
Publication of US1468542A publication Critical patent/US1468542A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/032—Details of scanning heads ; Means for illuminating the original for picture information reproduction
    • H04N1/036—Details of scanning heads ; Means for illuminating the original for picture information reproduction for optical reproduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/23—Reproducing arrangements

Definitions

  • the present invention has for its object a rocess and apparatus for reproducing writing or pictures by means of electric elementary impuises.
  • the invention principally consists in the use of on oscillogreph at the receiving Ste tion actuetei by nleens of electric elemen 'tery impulses in Combination with one or more optical arrangements for producing overiapping points on a light-sensitive ma teriai corresponding to elementary signs which form together a, reproduction of the Writing or picture to be reproduced.
  • Two or more of optical arrangements may be used which are so disposed that the light re s which are reflected from a mirror actuate by or mounted on an oscillograph overlap each other with regard to the nerrow slot, whereby there is caused the fee metion oi as number of points or elementary signs on the fight-sensitive materiel.
  • Two forms of the invention are illustreted on the drewing.
  • Figs. 1 and F23 represent front view and plan partiy in section of the apparatus eceorciing to one form of the invention.
  • Fig. 3 is diagram showin a particular errel'igenient for increasing t e number of clemente-rv signs.
  • Fig. 4- is a (iiegremrnnticel illustration of three iiifierent arrangements of the over lap ping oseservertions.
  • *ig. 5 is e, ifront View of e modified con strnctien.
  • Fig. is a, sectional plan of the some on the line 1 1 Fig. 5 and Fig. 7 e, sectional nlen on the line H II Fig. 5. v
  • the main feature of the invention con sists therein that the elementary impulses 1921. Serial LFo. $76,002.
  • tery signs are formed thereon, which form together a reproduction of the original writing or picture.
  • the apparatus comprises the following parts (Figs. 1 and 2) A stationary source of light A throwing intense light, two siots F on the ioop mirror of the osciiiograph, which egein' refleets the rays of light on to the Eight-smash tWe paper measuring icon with n loop mirror mounted thereon is pieced in the field of electromegnet J.
  • the measuring loop itself is coupled in. the circuit of the driving current necessary for taking up the picture enci. by alteration or this current is ceased to oseiiiete corresponding to the current tim pulses in the circuit. 7
  • a mirror arrangement C two rays of light on the loop mirror from each side of the some.
  • An eptieai arrangement concen the ray of iight refiecte from the ice mirror on the light-sensitive paper.
  • the apparatus 5 serves to mount anti. guide the lightsensitive peper.
  • a light-sensitive meteriei (pepenfiirn or the like) is pieced on the device or drum G to which is imparted by means of e suitehie driving mechanism a rotary and progressive movement.
  • the whoie of the apparatus is placed. in fight-tight H of which the sideturned against the loop mirror is pro-- vieieri with a narrow verticsi siet Uwing to the osciiietions of the current conducted to the measuring loop, correspomiing cscritetions ere imperterltc the mirror which is thereby eeuseti to reflect two or more rays of light (in. the present c two ⁇ in the dire ticn of the iight-ser paper, said rays oi light oscillating horizontally across the narrow Vertical slot K in front of the paper.
  • the original which is to be reproduced is directly or indirectly connected in the same circuit as the measuring loop and causes the electrical oscillation in the circuit by means of particular interrupting and closing arrangement.
  • the reproduction of pictures or writing thus takes place by production in the receiving apparatus of the necessary number of elementary signs corresponding to the original.
  • the illustrated form of the oscillograph receiver is provided with a double mirror and lens arrangement.
  • the oscillation angle 89 and 10-11 (Fig. 3) on the loop mirror is so adjusted that the top of the curve for both light rays passes the slot in front of the paper through the collecting lens placed at the point, whereby one, two or more elementary signs are produced on the paper for each alteration or half period.
  • the oscillating movement of the light rays reflected "from the mirrors C thus overlap each other with regard to the slot.
  • Tee paths described by the pencils of light are approximately sin-curves, and as indicated at a the crests do not extend entirely across the illuminating slot K but they everlap within the opening by a small amount 0. As shown at y the overlap of the crests is greater than the width of the slot K. so that instead oi mailing only a single actinic impression as in at through the slot K, each crest makes two impressions on the moving actiuic surface.
  • each wave has a saddle back crest dicated at a. n, whereby they will whose amplitude is sufficient to traverse the slot K and leave four impressions on the actinic surface for each half period, the overlap 0 being greater than the width of slot K.
  • an incandescent lamp Z is mounted in a lamp-housing, a, said lamp being provided with two filaments c, c.
  • the lamp-housing also serves as holder for a double lens-arrangement with (l. (2' so placed that a picture of the source of light is formed on the small oscillograph mirror 6 placed in the magnetic field of magnets f, f. g and g are the two rays of light, which are thrown on the oscillograph mirror c from the two filaments c, o to different sides thereof at a suitable angle.
  • ⁇ Yhen the mirror is in its position of rest the light ray from g is reflected in the direction g and the light ray from g in the direction g.
  • the loop to which the mirror 6 is fastened is supplied with alternating current it begins to oscillate and by a suitable supply of current to the loop the oscillation may be so adjusted that the two rays of light from opposite sides pass the centerline of the apparatus.
  • the optical projection apparatus which is characteristic for the present invention.
  • the projection arrangement comprises the collecting lens i in the focus of which the oscillograph mirror 0 is placed.
  • the rays sent from mirror 6 into lens 2' will therefore be parallelized by the lens.
  • another collecting lens Z At a certain distance from the lens 1' suitable for the construction of the apparatus is placed another collecting lens Z in such a manner that the focus of the same falls on the light-sensitive paper h, which on the drawing is shown as mounted on a cylinder.
  • the mirror 6 When the oscillograph is actuated by means of signal current from the sending apparatus, the mirror 6 is oscillated and the rays of light reflected from the mirror will oscillate as indicated on Fig. 7, where m and m show the amplitudes when the mirror performs full oscillations. men the mirror is not actuated by signal current, it will either be completely at rest when the light rays are reflected outside the lens, or if a weak current always passes through the line the light rays will oscillate as inalso be outside the lens As it appears from the drawing both amplitudes of the signal current are utilized in this manner, and the light rays are utilized during the whole of their Ill passage across lens 1''.
  • two lamps may be used instead of a lamp with two filaments or a single lamp with a single filament may be used, whereby the rays are divided by means of mirrors.
  • the distance between the lens 11 and Z may be varied at will as. the rays of light are parallel and accordingly the light rays .may also be deflected by means of mirrors, if so desired.
  • an oscillograph including a mirror, means to supply a ray of light thereto, an actinic surface arranged to receive light reflected by said mirror and means to direct a light beam from said mirror and means to permit a plurality of exposures of saidsurface for each period of the alternating current supplied to said oscillogranh.
  • the angles of incidence of said beams being arranged to reflect from the mirror in overlap in crests onto said surface through sai s 0t.
  • an oscillograph In a copying telegraph, an oscillograph, an actinic surface, a collecting and a condensing lens combination .focussed on said surface, said combination arranged to direct crest portions of a light beam reflected from said mirror through said combination, the crest portions of one half period overlapping those of the. other half period of swing of the mirror.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Projection-Type Copiers In General (AREA)
US476002A 1920-06-17 1921-06-08 Copying telegraph Expired - Lifetime US1468542A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DK31579D DK31579C (da) 1920-06-17 1921-04-04 Anordning ved Kopitelegrafer.
DEP41885D DE418329C (de) 1920-06-17 1921-04-14 Empfangsvorrichtung fuer die Fernuebertragung von Bildern, Photographien u. dgl.
CH97549D CH97549A (de) 1920-06-17 1921-04-15 Verfahren und Vorrichtung zur Wiedergabe von Schrift und Bildern auf weite Entfernung.
GB1133421A GB165074A (da) 1920-06-17 1921-04-19
NL19303A NL11019C (da) 1920-06-17 1921-04-29
FR535138D FR535138A (fr) 1920-06-17 1921-05-07 Télégraphe copieur
US476002A US1468542A (en) 1920-06-17 1921-06-08 Copying telegraph

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO535138X 1920-06-17
US476002A US1468542A (en) 1920-06-17 1921-06-08 Copying telegraph

Publications (1)

Publication Number Publication Date
US1468542A true US1468542A (en) 1923-09-18

Family

ID=23890086

Family Applications (1)

Application Number Title Priority Date Filing Date
US476002A Expired - Lifetime US1468542A (en) 1920-06-17 1921-06-08 Copying telegraph

Country Status (7)

Country Link
US (1) US1468542A (da)
CH (1) CH97549A (da)
DE (1) DE418329C (da)
DK (1) DK31579C (da)
FR (1) FR535138A (da)
GB (1) GB165074A (da)
NL (1) NL11019C (da)

Also Published As

Publication number Publication date
GB165074A (da) 1921-12-22
FR535138A (fr) 1922-04-10
DK31579C (da) 1923-04-23
NL11019C (da) 1924-05-15
CH97549A (de) 1923-02-01
DE418329C (de) 1925-09-07

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