US2297462A - Type wheel for telegraph apparatus - Google Patents

Type wheel for telegraph apparatus Download PDF

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Publication number
US2297462A
US2297462A US356455A US35645540A US2297462A US 2297462 A US2297462 A US 2297462A US 356455 A US356455 A US 356455A US 35645540 A US35645540 A US 35645540A US 2297462 A US2297462 A US 2297462A
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US
United States
Prior art keywords
type wheel
wheel
recess
telegraph apparatus
printed
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
US356455A
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English (en)
Inventor
Dressler Max
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2297462A publication Critical patent/US2297462A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/18—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of receivers
    • H04L13/182—Printing mechanisms

Definitions

  • This invention relates to a type wheel for telegraph apparatus.
  • the above-mentioned drawback may be avoided in a very simple manner. This may be accomplished according to the invention by cutting out from the type wheel at least that portion of the rim which in its position of rest is opposite to the paper tape in such a manner that the last character of a communication printed by the type wheel is visible.
  • the type wheel In apparatus in which the type wheel is inked by an ink roller the type wheel is machined to such an extent as to leave on the side of the type wheel away from the operator sufiicient stock to maintain on this side the circular form of the type wheel. In this manner the ink roller is prevented from engaging the recess.
  • Fig. 1 shows an embodiment of the invention in diagrammatic form, including a type wheel recessed for the purpose stated above, and Fig. 2 shows a cross-section through the type wheel taken on a diameter which intersects the recess.
  • Fig. 1 a type wheel I for an apparatus whose individual characters are formed of character elements corresponding to portions of letters, as illustrated and described, for instance, in the U. S. Patent No. 2,139,452.
  • the type wheel of such an apparatus operating on the start-stop principle is, for instance, driven by the shaft 2 and inked by the ink-roller 4 mounted on the shaft 3.
  • the printing is brought about by pressing the paper tape 5 against the type wheel with the aid of a printing hammer (not shown). If it is assumed that the transmitted communication ends with the word Berlin as shown on the paper tape, and if an ordinary type wheel is employed, the operator cannot read the last letter on the tape inserted in the apparatus.
  • the type Wheel of the above-mentioned apparatus stops, however, according to the startstop principle always in a given angular position after each letter has been printed.
  • This fact is taken advantage of according to the invention to provide a recess H1 in the type wheel.
  • the type wheel is in the position of rest in which the recess I0 is opposite to the paper tape.
  • the last letter n of the word Berlin is visible on the paper tape H.
  • the ink roller 4 is so cut as to leave as indicated at I2, Fig. 2, on the side away from the operator, an amount of stock of the type wheel rim sufiicient to maintain the circular form thereof.
  • the invention may as in the embodiment shown be applied to an apparatus operating with characters formed of character elements. It may, however, also be employed in known apparatus employing the fiveor six-unit code and operating on the start-stop principle. In order that the invention may be carried into practice the type wheel must return after each letter has been printed to the initial position. However, this is the case with a great number of type wheel receivers employing the five-unit code and operating on the start-stop principle.
  • a type wheel having a recess in that portion of its periphery which is adjacent the tape in the normal position of the type wheel, whereby the last character of the printed communication is rendered visible.
  • a type wheel which is cut away on the side toward the operator to form. a recess intersecting the periphery of the wheel, said recess being located in that part of the periphery of the wheel which is adjacent the tape when the wheel is at rest, whereby the recess is effective to expose the tape beneath the wheel and render the last printed character visible to the operator.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Handling Of Cut Paper (AREA)
US356455A 1939-07-15 1940-09-12 Type wheel for telegraph apparatus Expired - Lifetime US2297462A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE216550X 1939-07-15

Publications (1)

Publication Number Publication Date
US2297462A true US2297462A (en) 1942-09-29

Family

ID=5829663

Family Applications (1)

Application Number Title Priority Date Filing Date
US356455A Expired - Lifetime US2297462A (en) 1939-07-15 1940-09-12 Type wheel for telegraph apparatus

Country Status (4)

Country Link
US (1) US2297462A (d)
BE (1) BE439001A (d)
CH (1) CH216550A (d)
FR (1) FR869439A (d)

Also Published As

Publication number Publication date
BE439001A (d)
FR869439A (fr) 1942-02-02
CH216550A (de) 1941-08-31

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