Dart History Final

first pencil invented

1560

in 1560 the first wooden pencil was invented by an italian couple simonio and lyndiana bernacotti created out of a hollow stick of juniper the original purpose of the first pencil was for carpenters to use and to make pencils that did not roll away

first design of the push pencil/mechanical pencil

1822

The mechanical pencils first design was created by sampson mordan and gabriel riddle and john isaac hawkins in Britain. A long time after the original pencil in 1822.Even after that was when they decided to add the metal shaft and made it into a screw mechanism instead of using the same functions as the regular pencil except with self sharpening lead

first patent for spring loaded mechanical pencil

1877

the first spring loaded push pencil/mechanical pencil was created in 1877 eventually by by sampson mordan and gabriel riddle and john isaac hawkins in Britain after years of giving up on the idea

first twist feed mechanical pencil

1895

the first twist feed mechanical pencil was created in 1895 including a ton of small improvements that came right after

ever ready sharp pencil

1915

the mechanical pencil became very popular in japan in 1915 when introduced as the ever ready sharp pencil also with some improvements by tokuji hayawkawa who was a metal worker who had just finished an apprenticeship and the big sell was the long lasting life at the time

eversharps

1920

early 1920s wahl had sold more than 12,000,000 eversharps

additional lead sizes

1939

the first mechanical pencil had 0.9 size lead in 1939 they started producing smaller lead sizes like 0.3, 0.5, 0.7, 1.3 and 1.4 mm lead

todays pencils

2000

Mechanical pencils today work on three principles Ratchet based pencils have two or three small jaws inside a ring at the tip, which hold the lead. When though button on the end of the pencil is pressed, jaws move forward and open pushing the lead forward. Released button closes the jaws, but lead stays at the place because a small rubber device holds it. Some ratchet-based pencils have a weight that moves back and forth and operate the mechanism that pushes the lead forward.