en.wikipedia.org/wiki/Mechanical_pencil

A mechanical pencil (US English) or propelling pencil (UK English), also clutch pencil, is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" /ˈlɛd/. The lead, often made of graphite, is not bonded to the outer casing, and can ... Mechanical pencils were first used in the 18th century, with many designs ...

www.historyofpencils.com/writing-instruments-history/history-of-mechanical-pencils

Mechanical pencils are also old invention dating even from 16th century. First ones were fairly simple mechanisms, only to become more complex with time.

pencils.com/brief-history-mechanical-pencil

Nov 18, 2014 ... But the first mechanical pencil patent wasn't applied for until 1822, when ... This is when Joseph Hoffmann invented the pushbutton clutch in ...

www.popularmechanics.com/technology/a21567/history-of-the-pencil

Aug 16, 2016 ... In fact, pencil-makers have been making "lead holders," early versions of mechanical pencils, for centuries. These lead holders were made of ...

www.historyofinformation.com/detail.php?entryid=3851

Invention of the Mechanical Pencil ... and inventor Sampson Mordan were the first to patent a metal pencil with an internal mechanism for propelling the graphite ...

bleistift.blog/2013/08/origins-of-the-mechanical-pencil

Aug 16, 2013 ... 16 Aug, 2013 in Mechanical pencils tagged guest blog post by memm ... The actual mechanical pencil was invented and patented in ... Stationery Factlets #6: Staedtler was the first European manufacturer of mechanical pencil ...

www.sharp-world.com/corporate/info/his/h_company/1915_1919

A Writing Instrument Ahead of its Time. World's First Mechanical Pencils. The mechanical pencil is well known today throughout the world, largely thanks to ...

www.cultpens.com/pencyclopedia/guide-to-mechanical-pencils

Our guide to mechanical pencils - features they have, and how to choose the pencil ... The first pencils were more like modern clutch pencils than what we now think ... Tokuji Hayakawa made the 'Ever-Ready Sharp Pencil', which was a huge  ...

cwpencils.com/blogs/news/about-mechanical-pencils

Jul 17, 2018 ... The mechanical pencil experienced a couple moments in the early 20th century too. First, in 1915, when the Ever-Sharp pencil was designed ...