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  • John Conrades Wahl and the Remington-Wahl Typewriter - Blogger
    In 1915 the Wahl Company took over a controlling interest in Charles Rood Keeran's Eversharp Mechanical Pencil Company In fairness, Wahl was to be issued with patents for innovations to the mechanical pencil beyond whatever Keeran had invented (the Wahl-style push button lead advance mechanism seen in the Doric pencils, for example)
  • Pencil Sharpening Patents (Class 144 28. 1) - Justia Patents Search
    Abstract: The invention relates to a pencil sharpener, comprising a clamping chuck (1) that feeds a pencil rotationally fixed therein to a rotating milling device The clamping chuck (1) comprises a plurality of locating tongues (8) pointing almost radially towards a clamp chuck axis (4) to fix the pencil, said tongues being connected to a
  • History of pencil sharpeners (until 1850) - patent-infos. de
    Incidentally, the company S Mordan Co will later encounter us as a pencil sharpener seller John Isaac Hawkins (1772-1855) was an English mechanical engineer, entrepreneur, inventor and patent agent - a very creative personality of his time He was born on March 14, 1772 in Taunton (Somerset, England)
  • THE MECHANICAL PENCIL SHARPENER - pasttools. org
    Webster Pencil Sharpener F S Webster Co Boston, MA: The Webster was a rotary type pencil sharpener with a single mill cutter Cast on the machine is the patent date, June 21st, 1892 but there is no record of this patent Patent App for Mar 19, 1901 Patent Received Nov 14, 1911: F B Canode Lakeside Pencil Sharpener Lakeside Specialty Co
  • US20100254746A1 - Mechanical pencil - Google Patents
    the mechanical pencil in accordance with the present invention made in order to solve the above-mentioned problems is a mechanical pencil which is arranged such that a chuck provided in a body cylinder reciprocates so as to grasp and release a writing lead to inch the above-mentioned writing lead forward, in which the above-mentioned chuck is held within the above-mentioned body cylinder so as
  • Google Patents
    Search within the title, abstract, claims, or full patent document: You can restrict your search to a specific field using field names Use TI= to search in the title, AB= for the abstract, CL= for the claims, or TAC= for all three For example, TI=(safety belt) Search by Cooperative Patent Classifications (CPCs): These are commonly used to represent ideas in place of keywords, and can also
  • US2818834A - Pencil sharpener - Google Patents
    ATTORNEYS United States Patent PENCIL SHARPENER Horace Keech, Erlton, and Donald H Lehr, Audubon, N 1 , assignors to C Howard Hunt Pen Co , Camden, N J , a corporation of New Jersey Application December 17, 1954, Serial No 475,871 It is a still further object of this invention to provide a pencil sharpener having a stop which can be
  • USD712481S1 - Mechanical pencil - Google Patents
    mechanical pencil mechanical pencil view ornamental design Prior art date 2013-03-15 Legal status (The legal status is an assumption and is not a legal conclusion Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed ) Active Application number US29 449,430 Inventor Carmen Okuku Lira
  • The Mechanical Pencil - UNREMEMBERED
    The Mechanical Pencil In 1822, the first patent for a lead pencil that needed no sharpening was granted to two British men, Sampson Mordan and Isaac Hawkins A silversmith by trade, Mordan eventually bought out his partner and manufactured the new pencils which were made of silver and used a mechanism that continuously propelled the lead forward
  • The Invention of the Pencil Sharpener - Today I Found Out
    Under US patent #594114, simply titled “pencil sharpener,” the patent describes a simple, light-weight, crank-powered pencil sharpener that caught the shavings Plus, as it is written in the patent, it could also act as a “as a paper-weight, desk ornament, and for other and similar purposes ” This sharpener was eventually called the “Love Sharpener ”
  • Mechanical pencil history : r mechanicalpencils - Reddit
    This is when Joseph Hoffmann invented the pushbutton clutch in New York City First incorporated into the Eagle Automatic, a product of the Eagle Pencil Company, this represents the first true mechanical pencil As impressive as these mechanical pencils had become, they still had a design flaw when compared to traditional wooden pencils
  • US4966208A - Pencil sharpener - Google Patents
    the pencil sharpener of this invention comprises a housing defining a vertical pencil passage, roller means for supporting and conveying a pencil back and forth along the pencil passage and abrasive means driven to rotate around the leading end of the pencil and self-rotate to produce a sharp point on the pencil and a control circuit for automatically performing pencil insertion, pointing
  • How the Pencil Sharpener Was Invented - Gizmodo
    On October 20, 1828, Parisian mathematician Bernard Lassimone applied for and was issued French patent number 2444 for his invention of the “taille crayon,” translated to English as “pencil
  • The Mechanical Pencil Sharpener - pasttools. org
    Sibley's Pencil Sharpener Waltham MA : This device was warranted to work twice as fast as any other pencil sharpener in the market It was advertised as the only practical pencil sharpener ever invented Sep 2, 1884: E S Stimpson Stimpson Pencil Sharpener Boston, MA : This sharpener was advertised as economical of time, labor and pencils
  • The History of Pencil Sharpeners - Back Then History
    In 1851, Walter K Foster of Bangor, Maine further improved on the prism sharpener's design, patented it, and started mass-producing pencil sharpeners in 1857 Several variations and improvements followed, with one of the most significant being John Lee Love’s crank-powered pencil sharpener, which he invented in the early 1900s





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