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Viewing 6691 to 6715 of 6715
1923-01-01
Technical Paper
230020
S O BJORNBERG
Detroit Section Paper - Since a gear is a product of the cutting tool, the gear-cutting machine and the operator, it can be no more accurate than the combined accuracy of these fundamental factors. All gear manufacturers aim to eliminate split bearings, high and low bearings, flats and other inaccuracies in tooth contour, because a gear having teeth the contours of which comply with the geometrical laws underlying its construction is by far the most satisfactory. Illustrations are presented to convey an understanding of the geometrical principles involved, together with other illustrations of testing instruments and comments thereon. The application of these instruments is termed quality control, which is discussed in some detail under the headings of hob control, machine control and gear control.
1922-01-01
Technical Paper
220058
JAMES A FORD
The process devised by the author was evolved to eliminate the difficulties incident to the finishing of the spline and body portions of a spline shaft, such as is used in transmission gearing, by grinding after the shaft has been hardened, and is the result of a series of experiments. The accuracy of the finished shaft was the primary consideration and three other groups of important considerations are stated, as well as four specific difficulties that were expected to appear upon departure from former practice. Illustrations are presented to show the tools used, and the method of using them is commented upon step by step. The shaft can be straightened to within 0.005 in. per ft. of being out of parallel with the true axis of the shaft, after the shaft has been hardened, and it is then re-centered true with the spline portion.
1922-01-01
Technical Paper
220008
ROBERT E WILSON, DANIEL P BARNARD
The authors state that the coefficient of friction between two rubbing surfaces is influenced by a very large number of variables, the most important being, in the case of an oiled journal, the nature and the shape of the surfaces, their smoothness, the clearance between the journal and the bearing, the viscosity of the oil, the “film-forming” tendency or “oiliness” of the oil, the speed of rubbing, the pressure on the bearing, the method of supplying the lubricant and the temperature. The primary object of the paper is to present the best available data regarding the fundamental mechanism of lubrication so as to afford a basis for predicting the precise effect of these different variables under any specified conditions. Definitions of the terms used are given and the laws of fluid-film lubrication are discussed, theoretical curves for “ideal” bearings being treated at length.
1922-01-01
Technical Paper
220056
K L HERRMANN
The different gear noises are classified under the names of knock, rattle, growl, hum and sing, and these are discussed at some length, examples of defects that cause noise being given and a device for checking tooth spacing being illustrated and described. An instrument for analyzing tooth-forms that produce these different noises is illustrated and described. Causes of the errors in gears may be in the hardening process, in the cutting machines or in the cutters. A hobbing machine is used as an example and its possibilities for error are commented upon. Tooth-forms are illustrated and treated briefly, and the hardening of gears and the grinding of gear-tooth forms are given similar attention.
1921-01-01
Technical Paper
210013
WILLIAM T MAGRUDER
The time has come when greater attention must be given to the smaller parts and the various appliances found on automotive machinery. Previously, investigations have been made by the research laboratories of a few companies manufacturing engines, carbureters and some other parts, but chiefly engines; by the laboratories of research corporations, including the Bureau of Standards and the Bureau of Mines; and by the engineering laboratories of colleges and technical schools. The number and value of the researches that can be conducted and reported on from time to time by these agencies depend entirely upon the appropriations that they can obtain by act of legislation and upon the personnel of the staff that can be attracted by the opportunity to do this class of work.
1919-01-01
Technical Paper
190055
F C GOLDSMITH
1918-01-01
Technical Paper
180016
F W GURNEY
1918-01-01
Technical Paper
180005
G W CARLSON
1918-01-01
Technical Paper
180025
A W SCARRATT
1917-01-01
Technical Paper
170016
ROLAND CHILTON
1917-01-01
Technical Paper
170008
F. G. DIFFIN
1915-01-01
Technical Paper
150033
A. L. STEWART
1913-01-01
Technical Paper
130046
A. RIEBE
1913-01-01
Technical Paper
130021
E. B. VAN WAGNER
1912-01-01
Technical Paper
120028
FRANK BURGESS
1912-01-01
Technical Paper
120011
J. B. HULL
1911-01-01
Technical Paper
110030
CYRUS E. MEAD
1911-01-01
Technical Paper
110024
ARNOLD C. KOENIG
1910-01-01
Technical Paper
100010
D. F. GRAHAM
1910-01-01
Technical Paper
100005
GEORGE WILLIAM SARGENT
1910-01-01
Technical Paper
100001
L. C. FREEMAN
The question of the selection of the proper sizes of ball-bearings for any given set of conditions is one that should properly receive the consideration of those most expert in their design and application. However, in change speed gear design, where the ratio between the diameters of the bearings and the diameters of the gears is small, the sizes of the bearings have so great an influence on the center distance of the shafts and the shape and outline of the casing that a change in the bearings from those originally laid out frequently necessitates the redesigning of the whole job.
1909-01-01
Technical Paper
090006
S. P. WETHERILL
1907-01-01
Technical Paper
070003
HENRY HESS
1906-01-01
Technical Paper
060002
HENRY HESS
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