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2. Wheatstone system - Wikipedia

   en.wikipedia.org/wiki/Wheatstone_system

   The paper punches were labelled with numbers: 1 for the top hole of the dot, 2 for the sprocket hole for dot, and 3 for the bottom hole for dot. When a dash was punched, extra hole punches to the right punched a centre hole with number 4 and a bottom hole with number 5. [2] The perforator was introduced in 1867. [6]

3. Punching machine - Wikipedia

   en.wikipedia.org/wiki/Punching_Machine

   A punching machine is a machine tool for punching and embossing flat sheet-materials to produce form-features needed as mechanical element and/or to extend static stability of a sheet section. According to the file, Richard Walsh, the county of Grayson, and the State of Texas had invented and applied for US patent in 1894.

4. Punched tape - Wikipedia

   en.wikipedia.org/wiki/Punched_tape

   Teletype 33 Automatic Send and Receive teleprinter with paper tape in both the reader and the punch Paper tape relay operation at US FAA's Honolulu flight service station in 1964. Punched tape was used as a way of storing messages for teletypewriters. Operators typed in the message to the paper tape, and then sent the message at the maximum ...

5. Hole punch - Wikipedia

   en.wikipedia.org/wiki/Hole_punch

   Some 2-hole punches have an "888" marking on their paper guide, to assist punching all four holes into A4 paper. [ 5 ] Konica Minolta specifies that for European 4-hole arrangements, all holes should be 11 ± 1 mm from the nearest (i.e. long/spine) edge of the paper, [ 6 ] which is slightly at variance with ISO 838's specification of 12 ± 1 mm .

6. Punching - Wikipedia

   en.wikipedia.org/wiki/Punching

   Punching is a forming process that uses a punch press to force a tool, called a punch, through the workpiece to create a hole via shearing. Punching is applicable to a wide variety of materials that come in sheet form, including sheet metal , paper , vulcanized fibre and some forms of plastic sheet.

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8. Keypunch - Wikipedia

   en.wikipedia.org/wiki/Keypunch

   Punch cards were stepped across the punch one column at a time, and the appropriate punches were activated to create the holes, resulting in a distinctive "chunk, chunk" sound as columns were punched. Both machines could process 51-, 60-, 66-, and 80-column cards. [20] The 026 could print the punched character above each column.

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