 | William Emerson - Centrifugal force - 1769 - 170 pages
...friction, without any other power to futtain it. .- In the common fcrew, fuch as is here fuppofed j the threads are all one continued fpiral from one end to the other ; but where there are two or more Ipirals, independent of one another, as in the worm .of a jack •, you muft meafure between thread... | |
 | William Emerson - Centrifugal force - 1793 - 386 pages
...friction, without any other power to fuftain it. In the common fcrew, fuch as is here fuppofed ; ' the threads are all one continued fpiral from one...there are two or more fpirals, independent of one anorher, as in the worm of a jack ; you muft meafure between thread and thread of the fame fpiral,... | |
 | George Adams - Science - 1794 - 540 pages
...it's friction, without any other power to fuftain it. In the common fcrew, fuch as is here fuppofed, the threads are all one continued fpiral( from one...independent of one another, as in the worm of a jack, sou mult meafurc bctweea thread and thread of the fame fpiral, in computing the power. Of a micrometer... | |
 | George Adams - Physics - 1794 - 606 pages
...fuppofed, the threads are all one continued fpira!, from one end to the other ; but where there are two cr more fpirals, independent of one another, as in the worm of a jack, you muft meafure between thread thread and thread of the fame fpiral, in computing; the power. Of a micrometer fcre1jo. The fcrew is... | |
 | James Smith - Industrial arts - 1815 - 684 pages
...which (lie preceding observations are exclusively applicable, the threads are one continued spiral from one end to the other; but where there are two or more separate spirals running up together, as in the worm of a jack, or the principal screw of a common... | |
 | Alexander Jamieson - Industrial arts - 1829 - 654 pages
...which the preceding observations are exclusively applicable, the threads are one continued spiral, from one end to the other ; but where there are two or more serate spirals running up together, as in the worm of a jack, or the principal screw of a common printing... | |
 | Alexander Jamieson - Mechanics - 1845 - 572 pages
...to which the preceding observations are exclusively applicable, the threads are one continued spiral from one end to the other ; but where there are two or more separate spirals running up together, as in the worm of a jack, or the principal screw of a common... | |
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... if the power be taken away, the fcrew will retain its pofition, and hinder the weight from defcending again by its friction, without any other power to fuftain it. In the common fcrew, fuch as is here fuppofed ; ' the threads are all one continued... 