Articles liés à MECHANICS OF THE SEWING MACHIN
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Measure the distance the weight must move when placed at toe end, while the wheel is making one-half a revolution. Measure the distance the weight moves, when placed at the heel end of the pedal while the driving wheel is making one-half a revolution. From the observations how will one calculate the amount of work one does to cause the driving wheel to make a complete revolution? Read paragraphs 13, 15, 16 and 17 in the textbook. Calculate the work put forth for case a, band c. Observe how many stitches are made while the driving wheel is making one revolution. Observe how many stitches are necessary to sew an inch of material. Calculate how much work is necessary to sew a yard in length when no cloth is under the presser foot, then when one thickness, and finally when two thicknesses of cloth are imder the presser foot. The following form is suggested for recording your results; use it or what is better make one for yourself. Should the distance between the individual observations be the same size as that between the series of observations and the series of calculations? Observations A AB BF orce applied atF orce applied at The distance the The distance the toe end or effort heel end or effort weight at the toe weight at the heel ab ca bc end moves, or end moves, or effort distance. effort distance. A v. Leave two (2) spaces between the two (2) sets of observations. Why? Number of stitches made during one revolution of the driving wheel Number stitches to an inch Time to sew a yard, when one sews at the ordinary rateL eave four (4) spaces between the observations and the calculations.
(Typographical errors above are due to OCR software and don't occur in the book.)
About the Publisher
Forgotten Books is a publisher of historical writings, such as: Philosophy, Classics, Science, Religion, History, Folklore and Mythology.
Forgotten Books' Classic Reprint Series utilizes the latest t
(Typographical errors above are due to OCR software and don't occur in the book.)
About the Publisher
Forgotten Books is a publisher of historical writings, such as: Philosophy, Classics, Science, Religion, History, Folklore and Mythology.
Forgotten Books' Classic Reprint Series utilizes the latest t
Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.
- ISBN 10 1141652749
- ISBN 13 9781141652747
- ReliureBroché
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