 | Frederick Walter Simms - 1834 - 124 pages
...pillar, presses the rollers upwards, with a force nearly a counterpoise to the superincumbent weight; the rollers on receiving the axis yield to the pressure,...allow the pivots to find their proper bearings in the Y's, relieving them, however, from a great portion of the weight. The telescope, K, is connected with... | |
 | William Galbraith - 1842 - 216 pages
...friction-rollers on which it rests, whereof one of them is shewn at e. This is accomplished by a spiral-spring fixed in the body of each pillar, which presses the...which, as a centre, there are fixed the two circles JJ, each close against the telescope on both sides. The circles are fastened together by small brass... | |
 | Benjamin Pike (Jr.) - 1848 - 482 pages
...presses the rollers upwards, with a force nearly a counterpoise to the superincumbent weight ; the rollers on receiving the axis yield to the pressure,...allow the pivots to find their proper bearings in the Y's, relieving them, however, from a great portion of the weight. The telescope, K, is connected with... | |
 | Benjamin Pike - 1848 - 356 pages
...presses the rollers upwards, with a force nearly a counterpoise to the superincumbent weight ; the rollers on receiving the axis yield to the pressure,...allow the pivots to find their proper bearings in the Y's, relieving them, however, from a great portion of the weight. The telescope, K, is connected with... | |
 | W.H.C. BARTLETT,LL.D., - 1865 - 494 pages
...pillar, presses the rollers upward, with a force nearly a counterpoise to the superincumbent weight ; the rollers on receiving the axis yield to the pressure,...the pivots to find their proper bearings in the Ys, relieving them, however, from a great portion of the weight. The telescope K is connected with the... | |
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... with the load it carries, is prevented from pressing too heavily on its bearings, by two friction rollers on which it rests, one of which is shown at e. A spiral spring, fixed in the body of each pillar, presses the rollers upwards, with a force nearly... 