GB334498A - Automatic transmitter particularly for teaching telegraphic and radio telegraphic signalling - Google Patents

Automatic transmitter particularly for teaching telegraphic and radio telegraphic signalling

Info

Publication number
GB334498A
GB334498A GB1025929A GB1025929A GB334498A GB 334498 A GB334498 A GB 334498A GB 1025929 A GB1025929 A GB 1025929A GB 1025929 A GB1025929 A GB 1025929A GB 334498 A GB334498 A GB 334498A
Authority
GB
United Kingdom
Prior art keywords
telegraphic
teaching
levers
signalling
radio
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
Application number
GB1025929A
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
Priority to GB1025929A priority Critical patent/GB334498A/en
Priority to DEP60030D priority patent/DE544806C/en
Publication of GB334498A publication Critical patent/GB334498A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L15/00—Apparatus or local circuits for transmitting or receiving dot-and-dash codes, e.g. Morse code
    • H04L15/04—Apparatus or circuits at the transmitting end
    • H04L15/18—Automatic transmitters, e.g. controlled by perforated tape

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Toys (AREA)

Abstract

334,498. Papalia, M. April 2, 1929. Perforated strip transmitters ; telegraphy teaching.-In a transmitter for use in the teaching of telegraphy, a strip 9, perforated with three sets of holes, is drawn by star-wheels 8 over the ends 21 of three levers 11 which are insulated from one another and pivoted on a shaft 10, so that when the end 21 of one of the levers rises through a perforation in the strip the corresponding contacts 12, 13 close the circuit of a receiving instrument. A cylinder 14 holds two of the levers 11 out of action at a time, the remaining lever being free to work in a groove formed on the surface of the cylinder. The latter can be turned by means of the knob 16 so as to select the required lever.
GB1025929A 1929-04-02 1929-04-02 Automatic transmitter particularly for teaching telegraphic and radio telegraphic signalling Expired GB334498A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1025929A GB334498A (en) 1929-04-02 1929-04-02 Automatic transmitter particularly for teaching telegraphic and radio telegraphic signalling
DEP60030D DE544806C (en) 1929-04-02 1929-04-05 Self-contained telegraphic transmission device intended for teaching purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1025929A GB334498A (en) 1929-04-02 1929-04-02 Automatic transmitter particularly for teaching telegraphic and radio telegraphic signalling

Publications (1)

Publication Number Publication Date
GB334498A true GB334498A (en) 1930-09-02

Family

ID=9964564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1025929A Expired GB334498A (en) 1929-04-02 1929-04-02 Automatic transmitter particularly for teaching telegraphic and radio telegraphic signalling

Country Status (1)

Country Link
GB (1) GB334498A (en)

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