This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 Excerpt: ... limits. It will be noted that in fig. 78 the ball arms are jointed on the axis of the vertical spindle, while in other cases the joints are at some distance from the axis; in other instances the arms are crossed as in fig. 81, so that the joints are on the sides of the spindle opposite to the corresponding balls. Each ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 Excerpt: ... limits. It will be noted that in fig. 78 the ball arms are jointed on the axis of the vertical spindle, while in other cases the joints are at some distance from the axis; in other instances the arms are crossed as in fig. 81, so that the joints are on the sides of the spindle opposite to the corresponding balls. Each of these arrangements affects the height of the cone of revolution for a given position of the balls. It is evident, from a mere inspection of the figures, for a given deviation of the balls from the axis of revolution, that the variation in the height is greatest in fig. 78, and least in fig. 81. It is quite possible to make a governor so inconveniently sensitive, that it is never still for a moment, but is affected by even the small periodic changes of velocity, which occui in each revolution of the engine. As the governor can, by its nature, never act until after the change of velocity actually occurs, which it is designed to control, and as, moreover, the periodic changes of velocity above referred to are only momentary in their duration, it may easily happen that the effect of a hypersensitive governor is only felt by the engine when it has resumed its normal speed of rotation, or R even attained a rate of speed which has fluctuated in the opposite sense to that which had affected the governor. In such cases, only harm can be done by the sensitiveness of the governor: for, supposing that it is affected at a period of the revolution when the crank-pin velocity is slightly above the average of the revolution, the supply of steam will be diminished when the crank-pin has re-attained its average speed, or even sunk below it, in which case the effect of the governor will be to aggravate the evil it was designed to cure. Many advantages are fo...
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In poor condition, suitable as a reading copy. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 650grams, ISBN:
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Seller's Description:
Good. Not Ex-Library. Hardback/Hardcover. Well read copy with EXTREME SPINE AND COVER WEAR, SPINE COVER ALMOST COMPLETELY GONE, FRONT AND BACK COVER HAVE WEAK BINDING and colouring of pages due to age but still very useable. Quick dispatch from UK seller.
