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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... greater than is usually attained , even in the best comparators and measuring machines . In this case the employment of link work was rendered impossible on account of the limited space at disposal , even granting that its employment ...
... greater than is usually attained , even in the best comparators and measuring machines . In this case the employment of link work was rendered impossible on account of the limited space at disposal , even granting that its employment ...
Seite 3
... greater than 10000 the length of the carriage ( in this case seven 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 ...
... greater than 10000 the length of the carriage ( in this case seven 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 ...
Seite 7
... greater care was taken in cleaning the surfaces before test- ing , and the results were then considerably better ; for com- 25 " , a quantity consider- * Resolving power as ordinarily used is defined by the relation ε = ^ / △ where is ...
... greater care was taken in cleaning the surfaces before test- ing , and the results were then considerably better ; for com- 25 " , a quantity consider- * Resolving power as ordinarily used is defined by the relation ε = ^ / △ where is ...
Seite 11
... greater the accuracy attainable with a given size of mirror and telescope . Al- though the shortest interval at which observations were plotted was three and one - half inches , the observations were in a sense continuous from one end ...
... greater the accuracy attainable with a given size of mirror and telescope . Al- though the shortest interval at which observations were plotted was three and one - half inches , the observations were in a sense continuous from one end ...
Seite 12
... greater than could have been caused by the simple removal of too great an amount of material at local places . Another curious thing was that the local grinding of a high spot seemed in many cases to increase rather than diminish the ...
... greater than could have been caused by the simple removal of too great an amount of material at local places . Another curious thing was that the local grinding of a high spot seemed in many cases to increase rather than diminish the ...
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Beliebte Passagen
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.