Journal of the Franklin Institute, Band 138Elsevier, 1894 Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-59. |
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Seite 3
... inches ) , or about o of an inch . Although this was a rather high degree of accu- racy for such long straight edges ( 511⁄2 inches ) , it was hoped * A slight error is introduced on account of the finite width of the edges themselves ...
... inches ) , or about o of an inch . Although this was a rather high degree of accu- racy for such long straight edges ( 511⁄2 inches ) , it was hoped * A slight error is introduced on account of the finite width of the edges themselves ...
Seite 6
... inch . One division of the micrometer head corresponded then to about the limit of accuracy imposed . The resolving power of the telescope employed was such that differences of at least one - fourth this amount could be measured with 7 ...
... inch . One division of the micrometer head corresponded then to about the limit of accuracy imposed . The resolving power of the telescope employed was such that differences of at least one - fourth this amount could be measured with 7 ...
Seite 8
... inches long , another seven inches , and the third about three inches long . For the purpose of approximately determining the amount removed , a fine micrometer screw , with a large divided . head , reading to 1 mm . = 500 " was mounted ...
... inches long , another seven inches , and the third about three inches long . For the purpose of approximately determining the amount removed , a fine micrometer screw , with a large divided . head , reading to 1 mm . = 500 " was mounted ...
Seite 9
... inches " 2 14 29'5 30 5 27.2 + 27'2 " 6 2'3 + 5 ° 0 3 21 28.5 27'2 + 1'3 " 28 25'5 27 2 35 25.8 27 2 42 256 27 ° 2 49 25'0 27'2 2'2 190'4 = ' 00007 X y Difference of Level ( Inches ) . * 00000 * C0016 0039 * 00048 ' 00036 * C0027 ...
... inches " 2 14 29'5 30 5 27.2 + 27'2 " 6 2'3 + 5 ° 0 3 21 28.5 27'2 + 1'3 " 28 25'5 27 2 35 25.8 27 2 42 256 27 ° 2 49 25'0 27'2 2'2 190'4 = ' 00007 X y Difference of Level ( Inches ) . * 00000 * C0016 0039 * 00048 ' 00036 * C0027 ...
Seite 10
Franklin Institute (Philadelphia, Pa.) As seven - inch intervals on the bar are too great for accurately determining its ... inch intervals may , therefore , be considered to be represented by the heavy line , Fig . 3. It 10 [ J. F. I. ...
Franklin Institute (Philadelphia, Pa.) As seven - inch intervals on the bar are too great for accurately determining its ... inch intervals may , therefore , be considered to be represented by the heavy line , Fig . 3. It 10 [ J. F. I. ...
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Seite 433 - And, he gave it for his opinion, that, whoever could make two ears of corn, or two blades of grass, to grow upon a spot of ground where only one grew before, would deserve better of mankind, and do more essential service to his country, than the whole race of politicians put together.
Seite 34 - I intend in many cases to employ the expansive force of steam to press on the pistons, or whatever may be used instead of them, in the same manner as the pressure of the atmosphere is now employed in common fire-engines.
Seite 441 - The Government then of the United States can claim no powers which are not granted to it by the Constitution; and the powers actually granted must be such as are expressly given, or given by necessary implication.
Seite 307 - Mendeleeff, which states that the properties of the elements are periodic functions of their atomic weights.
Seite 443 - Any person who has invented or discovered any new and useful art, machine, manufacture, or composition of matter...
Seite 356 - With the standards of the people plunging through the thunder-storm; Till the war-drum throbbed no longer, and the battle flags were furled In the Parliament of man, the Federation of the world.
Seite 439 - Provided also, and be it declared and enacted, That any declaration before mentioned shall not extend to any letters patents and grants of privilege for the term of fourteen years or under, hereafter to be' made, of the sole working or making of any manner of new manufactures within this realm...
Seite 440 - ... any manner of new manufactures within this realm to the true and first inventor and inventors of such manufactures, which others at the time of making such Letters...
Seite 440 - ... and grants shall not use, so as also they be not contrary to the law nor mischievous to the state, by raising prices of commodities at home, or hurt of trade, or generally inconvenient, the said fourteen years to be accounted from the date of the first letters...
Seite 443 - ... not patented or described in any printed publication in this or any foreign country before his invention thereof, or more than two years prior to his application, and not in public use or on sale in this country for more than two years prior to his application, unless the same is proved to have been abandoned, may, upon payment of the fees required by law and other due proceedings had.