Author : Moritz Grossmann
Publisher : Rarebooksclub.com
ISBN 13 : 9781230187891
Total Pages : 42 pages
Book Rating : 4.1/5 (878 download)
Book Synopsis Prize-Essay on the Detached Lever Escapement for Watches and Timepieces by : Moritz Grossmann
Download or read book Prize-Essay on the Detached Lever Escapement for Watches and Timepieces written by Moritz Grossmann and published by Rarebooksclub.com. This book was released on 2013-09 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1866 edition. Excerpt: ... the escapement? The answer to this question is very similar to those already given, when speaking of the proportions of the pallet. Any increase of length on the lever will require a greater radius of impulse, or a greater distance of the impulse-pin from the balance-centre, if the angle of lifting shall remain the same, and consequently the arc of intersection will be longer, and the friction of the acting parts must augment in the same ratio. The force transmitted both in the unlocking-and the impulseaction is the same, whether the lever be long or short, provided the angles performed and the proportions of lever-length and impulse-radius remain the same in both cases, and the only difference consists in the greater breadth of intersection, and the increased friction connected with the long lever. These considerations would lead to employing as short levers as possible, but it must be observed here, that the forementioned diminution of the intended effect of movement, by the necessary side-shake in the pivot-holes, must be taken notice of, because the loss, arising from this circumstance, though an absolute quantity, is in very different proportions to the extent of the distance to be performed by the fork and roller-action. Therefore it is advisable not to go too far in either direction, and it may be esteemed a good proportion to make the lever not so long as to allow its arbor standing beyond the circumference of the balance. One consequence of the short lever in all 3/ platewatches will be, that ithe pallet-arbor must be made veiy short and the escape-pinion too, if the escapement is not set in straight line, but the advantages of diminished friction outweigh this little defect of construction so much, that we see all the...
