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  2. Hole punch - Wikipedia

    en.wikipedia.org/wiki/Hole_punch

    A hole punch, also known as hole puncher, or paper puncher, is an office tool that is used to create holes in sheets of paper, often for the purpose of collecting the sheets in a binder or folder (such collected sheets are called loose leaves). A hole punch can also refer to similar tools for other materials, such as leather, cloth, or sheets ...

  3. 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]

  4. Punching machine - Wikipedia

    en.wikipedia.org/wiki/Punching_Machine

    A HACO CNC punching machine Punched hole: best results for cutting surface with above 70% cutting, low clearance necessary (8% material thickness) Punch presses are developed for high flexibility and efficient processing of metal stampings. The main areas of application are for small and medium runs.

  5. Keypunch - Wikipedia

    en.wikipedia.org/wiki/Keypunch

    The heart of the 024 and 026 keypunches was a set of twelve precision punches, one per card row, each with an actuator of relatively high power. 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.

  6. Punched card input/output - Wikipedia

    en.wikipedia.org/wiki/Punched_card_input/output

    An IBM 80-column punched card of the type most widely used in the 20th century IBM 1442 card reader/punch for 80 column cards. A computer punched card reader or just computer card reader is a computer input device used to read computer programs in either source or executable form and data from punched cards.

  7. 66 block - Wikipedia

    en.wikipedia.org/wiki/66_block

    A 66 block is a type of punch-down block used to connect sets of wires in a telephone system. They have been manufactured in four common configurations, A, B, E and M. [a] A and B styles have the clip rows on 0.25" centers while E and M have the clip rows on 0.20" centers. The A blocks have 25 slotted holes on the left side for position the ...

  8. 15 holiday gifts for dementia patients and caregivers ...

    www.aol.com/15-holiday-gifts-dementia-patients...

    Spending time and engaging with the person in meaningful ways can be the best gift of all." Original article source: 15 holiday gifts for dementia patients and caregivers: 'Cognitively appropriate ...

  9. Wire binding - Wikipedia

    en.wikipedia.org/wiki/Wire_binding

    In order to bind documents with double loop wire, a binding machine and a wire closer are required. Smaller organizations will often choose a small manual wire binding machine that offers a manual hole punch and a built-in wire closer. Medium-sized users will often choose a wire binding machine with an electric punch and built-in wire closer.

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