 | Perry Fairfax Nursey - 1841 - 538 Seiten
...of this angle in one-inch screws was found to be about 55", and this was also pretty nearly the mean of the angle in screws of different diameters. As...exclusively on many of the railways, and in some of the most eitensive engineering establishments in England and Scotland. During the present year it has been introduced... | |
 | Joseph Whitworth - 1858 - 234 Seiten
...constant, more especially with reference to general uniformity of system, the angle of 55° has been adopted throughout the entire scale. A constant proportion...two-thirds of the pitch. The precaution of rounding oif is adopted to prevent the injury which the thread of the screw, and that of the taps and dies,... | |
 | Thomas Minchin Goodeve, Charles Percy Bysshe Shelley - 1877 - 116 Seiten
...instead of -96. A constant proportion is thus established between the depth and pitch of the thread. The precaution of rounding off is adopted to prevent...the taps and dies might sustain from accident. The standard pitches which are now universally acknowledged and adopted are given in the table which follows... | |
 | 1883 - 572 Seiten
...depth of the thread is rounded off from the top, and one-sixth from the bottom. The actual depth is rather more than three-fifths, and less than two-thirds of the pitch. The slow adoption of such an admirable system was perhaps due, in great measure, to the fact that it was... | |
 | British Association for the Advancement of Science - 1883 - 932 Seiten
...depth of the thread is rounded off from the top, and onesixth from the bottom. The actual depth is rather more than three-fifths, and less than two-thirds, of the pitch. The slow adoption of such an admirable system was perhaps due, in great measure, to the fact that it was... | |
 | 1887 - 640 Seiten
...instead of '96. A constant proportion is thus established between the depth and pitch of the thread. The precaution of rounding off is adopted to prevent...the taps and dies might sustain from accident." The Sellers thread has an angle of 60°, squared off to the extent of one-eighth of the pitch top and bottom.... | |
 | Britannia company - 1892 - 330 Seiten
...depth of the thread is rounded off from the top, and one-sixth from the bottom. The actual depth is rather more than three-fifths, and less than two-thirds of the pitch. " The slow adoption of such an admirable system was perhaps * See Chap. II. due, in great measure, to the... | |
 | Joseph Wickham Row - 1916 - 422 Seiten
...one-sixth from the bottom of the thread. Making this deduction it will be found that the angle of 55 deg. gives for the actual depth rather more than three-fifths...of the taps and dies, might sustain from accident. 6 ' ' Report of the British Commissioners to the New York Industrial Exhibition." London, 1854. was... | |
 | 1883 - 520 Seiten
...depth of the thread is rounded off from the top, and one-sixth from the bottom. The actual depth is rather more than three-fifths, and less than two-thirds of the pitch. The slow adoption of such an admirable system was perhaps due, in great measure, to the fact that it was... | |
| |
A constant proportion is thus established between the depth and the pitch of the thread. In calculating the former, a deduction is to be made for the quantity rounded off, amounting to one-third of the whole depth, that is, one-sixth from the top, and... 