Size Standardization by Preferred Numbers (Classic Reprint).cC F Hirshfeld
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Author: C F Hirshfeld
Page Count: 66 pages
Published Date: 27 Sep 2015
Publisher: Forgotten Books
Publication Country: United States
Language: English
Type: Pdf
ISBN: 9781332196234
File size: 10 Mb
Download Link: Size Standardization by Preferred Numbers (Classic Reprint)
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Excerpt from Size Standardization by Preferred Numbers
In fact, the need for means of expressing size is probably the underlying reason for the heterogeneously assorted systems of expression now in use.
Further, size, in the general sense of the word and also in the specific sense, is directly or indirectly made up of two components or factors. One of these is a number and the other a dimension, as in "1-in." bar stock.
Numerous cases will be found in which this composite structure is not evident, but it will always appear if the search is carried far enough. When a given kind of equipment is sold under the size designations, Model No. 1, Model No. 2, etc., the model size itself is determined by its physical size or capacity. Thus Model No. 1 may be 4 ft. high, or may have a capacity of 1 ton in a given time, while Model No. 2 may be 6 ft. high or have a capacity of 2 tons, etc.
In any general study of sizes we must therefore consider two components which are respectively numerals and units of measurement. These units of measurement are matters of custom or use which vary both with the type of measurement and with the systems adopted in different countries.
In considering the so-called "Preferred Numbers" we have no direct interest in these dimensional units. Our concern is entirely with the numerical part of the doublet used for expressing size, except in so far as the relations between dimensions in any one system of measurement may make certain numerals more or less convenient. As an example of the significance of this exception, consider the possible means of expressing a length of 27 ft. in the English system. This might be called 9 yd., 27 ft., or 324 in. In measuring dress goods the yard is the most convenient or at least the conventional unit and thus brings about the necessity for the use of the numeral 9 in expressing the size indicated. In certain other types of measurement, as, for instance, in measuring length of lumber, the foot unit is the most convenient and thus makes necessary the use of the numeral 27. The inconvenience of using the number 324 probably explains the use of feet and yards instead of inches for large measurements.
Sizes used in industry and commerce may be divided into several different categories or classes, as follows:
1 Sizes which are entirely matters of style, such as the lengths of coats, the heights of hats, and other dimensions which change from year to year.
2 Sizes which are determined entirely by personal comfort, such as the sizes of men's collars, the sizes of hats and shoes, etc. Each of these series of sizes has been worked out by experience and it is not unreasonable to assume that at the present time they form satisfactory systems.
3 Sizes which are entirely matters of taste, though not necessarily matters of fashion.
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