US1726126A - Electric picture transmission - Google Patents

Electric picture transmission Download PDF

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Publication number
US1726126A
US1726126A US265779A US26577928A US1726126A US 1726126 A US1726126 A US 1726126A US 265779 A US265779 A US 265779A US 26577928 A US26577928 A US 26577928A US 1726126 A US1726126 A US 1726126A
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US
United States
Prior art keywords
picture
paper
layer
picture transmission
electric
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
US265779A
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English (en)
Inventor
Scheppmann Wilhelm
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1726126A publication Critical patent/US1726126A/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
    • H04N1/23—Reproducing arrangements

Definitions

  • the present invention relates to electric picture transmission systems, e. g., those working according tothe telegraphic, or an equivalent principle.
  • the object of this invention is particularly directed to an improved and simple means for reproducing the picture, drawing, or document at the receiving station.
  • Another object of the present invention is to provide a reproduction means which is very simple and does not need further treatment-after the picture has been received.
  • Still another object of the present invention is to provide a simple means for receiving pictures, drawings, and documents sentout by broadcasting stations for amateurs.
  • Fig. 2 shows a front view of a receiving apparatus in its simplest form.
  • the paper is of a darker color than the applied layer of wax. Only a small pressure on the layer exercised by a sharp tool operated by the picture current impulses will suffice to remove or scratch off the layer so that the paper will be laid open.
  • lines as thin as a hair may be produced in the wax layer. This latter may be made so thin (about 1/100 to 2/100 cm), that a very slight pressure produced by a stylus operated by an armature or a membrane will produce a mark on the layer.
  • the armature or membrane is actuated by the picture current impulses received from the transmitting station.
  • these current impulses are of shorter or longer duration, and will produce corresponding shorter or longer scratchings on the receiving paper, and thus build up the picture.
  • Numeral 1 is a rotating cylinder moved at the same time lengthwise in the direction of its axis. This cylinder is operated synchronously with a similar cylinder ar ranged at the transmitting station intended for scanning the picture to be transmitted. This latter may be prepared by applying a non-conducting material to a conducting sheet to be mounted 1011 the transmitting cylinder. A stylus or feeler scanning the picture on the transmitting station in a spirallike manner opens and closes an electric circuit and sends corresponding current impulses to the receiving station. This transmission may be effected by means of wire or by wireless, as is well-known in the art. These current impulses energize a receiving magnet 4.
  • the magnet 4 operates a lever 5 at the other end of which a stylus 6 is attached.
  • a spring 7 is provided to hold the lever in its zero position, i. e., the position at the time when coil 4 is not energized.
  • the registration paper 2 bearing the thin layer of wax 3 is fixed on the receiving cylinder 1.
  • the system described is very well adapted for transmitting so-called black and white pictures such as drawings, written or printed documents, weather maps, and is especially useful in wireless transmission for broadcasting purposes on account of its simplicity and easy operation.
  • An inclined straight line transmitted from the sending station would look on the receiving sheet somewhat as shown at L in Fig. .2.
  • the operation of the device represented in the drawing may also be such that normally the stylus 6 is pressing on the registration paper, and that an incoming picture current impulse will remove it therefrom. Thus, a negative picture with respect to that obtained before, will be received.
  • the synchronization of the sending and receiving cylinders may be effected in any known manner which is not described here, as being out offthe scope of this invention.
  • Means for picture reproduction in elec tric' picture transmission systems comprising a sheet of registration material having a dark paper, and means operated in accordance with the picture current impulses to scratch off said layer to directly produce a positive.
  • Means for reproduction of visual images by electric impulses comprising a cylinder, a registration surface on said cylinder having a dark colored background, a layer of Wax of light color compared to said surface on said surface, and means for recording the image elements corresponding to said electric impulses by mechanical indentations on said wax layer whereby a positivepicture is produced.
  • Means for reproduction of visual images by electric impulses comprising a cylinder, at registration surface on said cylinder having a dark shade background, a layer of wax of light color compared to said surface on said surface, and means comprising an electrically operated stylus for producing mechanical indentations of said wax layer in accordance to said image elements whereby a positive picture is produced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Magnetic Record Carriers (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
US265779A 1927-04-05 1928-03-29 Electric picture transmission Expired - Lifetime US1726126A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE288257X 1927-04-05

Publications (1)

Publication Number Publication Date
US1726126A true US1726126A (en) 1929-08-27

Family

ID=6059530

Family Applications (1)

Application Number Title Priority Date Filing Date
US265779A Expired - Lifetime US1726126A (en) 1927-04-05 1928-03-29 Electric picture transmission

Country Status (4)

Country Link
US (1) US1726126A (zh)
FR (1) FR654723A (zh)
GB (1) GB288257A (zh)
NL (1) NL21777C (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563119A (en) * 1948-03-03 1951-08-07 Otis Pressure Control Inc Recorder chart for oil or gas well recording instruments
US2676867A (en) * 1953-04-13 1954-04-27 Skanska Cementgjuteriet Ab Deformation recording device for rotary furnaces
US2859956A (en) * 1956-04-27 1958-11-11 Meriam Charles Liquid flow recorder
US2927833A (en) * 1956-09-27 1960-03-08 Itt Path recording system
US3032355A (en) * 1958-01-31 1962-05-01 Zalkind Joseph Meter ticket

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563119A (en) * 1948-03-03 1951-08-07 Otis Pressure Control Inc Recorder chart for oil or gas well recording instruments
US2676867A (en) * 1953-04-13 1954-04-27 Skanska Cementgjuteriet Ab Deformation recording device for rotary furnaces
US2859956A (en) * 1956-04-27 1958-11-11 Meriam Charles Liquid flow recorder
US2927833A (en) * 1956-09-27 1960-03-08 Itt Path recording system
US3032355A (en) * 1958-01-31 1962-05-01 Zalkind Joseph Meter ticket

Also Published As

Publication number Publication date
FR654723A (fr) 1929-04-10
NL21777C (zh)
GB288257A (en) 1928-05-10

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