Re: Tell about invention of Pencil ?

Wed Jan 09, 2019 6:35 pm

remarkable history in the Petroski’s descriptions.

Wed Jan 09, 2019 6:35 pm

For instance, Johann Mathesis’s book-“A new discovery for writing

Wed Jan 09, 2019 6:35 pm

also gave some illustrations about the use of pencil

Wed Jan 09, 2019 6:36 pm

But none of them laid strong foundations for the invention of Pencil.

Wed Jan 09, 2019 6:36 pm

. As neither of them received any credits for the Invention of Pencil.

Wed Jan 09, 2019 6:36 pm

They had only expressed the benefits which the discovery had made to the ordinary people.

Wed Jan 09, 2019 6:36 pm

The glimpse of the actual imitation of the nowadays graphite pencils

Wed Jan 09, 2019 6:37 pm

can be seen in Ben Block’s Life-Cycle Studies: Pencils.

Wed Jan 09, 2019 6:37 pm

It is mentioned in the book that those imitated versions of graphite pencils

Wed Jan 09, 2019 6:37 pm

were made using large deposits of the pure graphite material

Wed Jan 09, 2019 6:37 pm

discovered by the Shepherds.

Wed Jan 09, 2019 6:37 pm

The material was easy to cut and even wrote very well.

Wed Jan 09, 2019 6:38 pm

Besides, People of that time used loaves of bread as their erasers

Wed Jan 09, 2019 6:38 pm

Those bread pieces when rubbed against the paper removed impressions of graphite from it.

Wed Jan 09, 2019 6:38 pm

On March 30, 1858, Hymen Lipman patented an invention in his name.

Wed Jan 09, 2019 6:38 pm

That Patent was for combining the graphite pencil and an eraser

Wed Jan 09, 2019 6:39 pm

Joseph Reckendofer then further brought up the patent

Wed Jan 09, 2019 6:39 pm

Joseph Reckendofer then further brought up the patent

Wed Jan 09, 2019 6:40 pm

tion, explained the construction of the pencil.

Wed Jan 09, 2019 6:40 pm

According to him, a lead or graphite is laid in a hollowed out interior groove

Wed Jan 09, 2019 6:40 pm

On the other end, a wider groove is carved and a little stick of rubber

Wed Jan 09, 2019 6:40 pm

this way, one can sharpen the pencil at both ends.

Wed Jan 09, 2019 6:40 pm

Unfortunately, a German firm, Faber-Castell, later on, overturned the patent

Wed Jan 09, 2019 6:41 pm

Unfortunately, a German firm, Faber-Castell, later on, overturned the patent

Wed Jan 09, 2019 6:41 pm

that without Lipman’s contribution to the prevailing design