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Who said: “A change in motion is proportional to the motive force impressed and takes place along the straight line in which that force is impressed.”
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Thumbnail of Charles Thurber (source)
Charles Thurber
(2 Jan 1803 - 7 Nov 1886)

American inventor of a Printing Machine, an early form of typewriter.


Banner heading of Scientific American for Vol 2 No 16 page 121 on 9 Jan 1847
Thurber’s Chirographer.

from Scientific American (1847)

We some month’s since noticed Mr. Thurber’s very ingenious machine for writing or forming letters by means of a series of keys which are operated like the keys of an organ. As the inventor’s claim in this invention may be interesting to some of our readers, we give it an insertion. The patentee says—“The nature of my invention consists in communicating to a pen or pencil holder, the motions necessary to delineate any and all letters or other characters, by motions at right angles to each other, obtained by sets of cams, each set being so formed as to combine the right angle movements, and thus generate the vertical, horizontal, oblique, and curved lines required to delineate the letters or characters. Each set of cams is actuated by a separate or distinct lever or handle, as in a piano forte, and the table, with the paper, &c., caused to move for ward the required distance at the termination of each letter or character by the return motion of the lever or handle.

Claim—“Having pointed out the principle of my invention, and the manner of constructing and using the same, and indicated some of the variations in construction, which may be made without changing the principle or character which distinguishes it from all other things before known, what I claim as my invention, and desire to secure by letters patent is communicating the motions to the pen or pencil by means of cams acting on frames, so that the vertical and horizontal strokes can be given by separate movements, and the oblique curved strokes by the combined action of the two, substantially as herein described. And I also claim giving to the sheet of paper, or other substance to be written upon, a horizontal movement for spacing off the letters, and a vertical movement for the lines, in combination with the movements of the pen or pencil, substantially as herein described.”

[This refers to Thurber’s second patented machine, US patent 4,271 issued 18 Nov 1845. —Webmaster]

Banner image and text from Scientific American (Jan 1847), 2, No. 16, 121 & 124. (source)


See also:
  • 2 Jan - short biography, births, deaths and events on date of Thurber's birth.
  • More for Charles Thurber on Today in Science History page.
  • Charles Thurber - Printing Machine (Typewriter) Patent No. 3228 - Brief Descriptions.
  • Large picture of Charles Thurber Printing Machine (1000 x 700 px)

Nature bears long with those who wrong her. She is patient under abuse. But when abuse has gone too far, when the time of reckoning finally comes, she is equally slow to be appeased and to turn away her wrath. (1882) -- Nathaniel Egleston, who was writing then about deforestation, but speaks equally well about the danger of climate change today.
Carl Sagan Thumbnail Carl Sagan: In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) ...(more by Sagan)

Albert Einstein: I used to wonder how it comes about that the electron is negative. Negative-positive—these are perfectly symmetric in physics. There is no reason whatever to prefer one to the other. Then why is the electron negative? I thought about this for a long time and at last all I could think was “It won the fight!” ...(more by Einstein)

Richard Feynman: It is the facts that matter, not the proofs. Physics can progress without the proofs, but we can't go on without the facts ... if the facts are right, then the proofs are a matter of playing around with the algebra correctly. ...(more by Feynman)
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