slide for making jigs for Barth's slide rules
Datecirca 1921
Inventory Number1990-4-0087
ClassificationSlide Rule
Subject
Maker
Carl G. Barth
1860-1939
Associate Name
Frederick W. Taylor
1856-1915
Cultural Region
Place of Origin
Dimensions0.6 x 50.9 x 2.5 cm (1/4 x 20 1/16 x 1 in.)
Material
Accessoriespossibly to be used with jigs 1990-4-38, 1990-4-39,...,1090-4-42
DescriptionRectangular wooden slide faced with off-white paper.
Printed along the top edge of the slide is a scale for "DIAMETER OF WORK," with values descending from 100 to 1. Printed along the bottom edge of the slide is a scale for "PRESSURE X DIAMETER," with values descending from 1,000,000 to 1,000. An "x" is superimposed on the mark for 100,000.
Printed along the top edge of the slide is a scale for "DIAMETER OF WORK," with values descending from 100 to 1. Printed along the bottom edge of the slide is a scale for "PRESSURE X DIAMETER," with values descending from 1,000,000 to 1,000. An "x" is superimposed on the mark for 100,000.
Signedback, center: CARL G. BARTH & SON / CONSULTING ENGINEERS / TAYLOR SYSTEM OF SCIENTIFIC MANAGEMENT / 10 SOUTH 18TH STREET PHILADELPHIA
Inscribedface, top left: FOR MAKING JIGS FOR LATHE RULES, ETC.;
face, on right: C.I.
Curatorial RemarksProbably made at the same time as 1990-4-0040;
Would be used with 1990-4-0086 to make a feed-speed jig for cutting in steel, see ex. 1990-4-0040.
FunctionFor making a jig from which a feed-speed slide rule (for cutting in cast iron) can be constructed.
The user first inserts the slide into the second-from-bottom groove of a jig form, see ex. 1990-4-0034. Then, holding the slide in place, he transfers the scales for "DIAMETER OF WORK" and "PRESSURE X DIAM." to the edges of the jig directly above and below the slide, respectively.
The user first inserts the slide into the second-from-bottom groove of a jig form, see ex. 1990-4-0034. Then, holding the slide in place, he transfers the scales for "DIAMETER OF WORK" and "PRESSURE X DIAM." to the edges of the jig directly above and below the slide, respectively.
ProvenanceThe papers and slide rules of Carl G. Barth and his son, J. Christian Barth, were transferred to the Baker Library of the Harvard Business School by J. Christian Barth in 1961.
The slide rules were transferred from Harvard Business School to the Collection of Historical Instruments in 1980.
Historical AttributesThis is part of a set of slide rules for machine shops designed by Carl G. Barth under Frederick Winslow Taylor's system of scientific management. Given the characteristics of a particular machine and a depth of cut, for example, a shop manager could quickly calculate the most efficient speed and feed settings using one of Barth's speed and feed slide rules. Other objects in the collection include slide rules for helical springs, belts, and gears, as well as jigs for making slide rules.
Carl G. Barth
Date: circa 1921
Accessories: possibly to be used with jigs 1990-4-38, 1990-4-39,...,1990-4-42
Object number: 1990-4-0056
Carl G. Barth
Date: circa 1921
Accessories: probably to be used with jig 1990-4-39. possibly to be used with jigs 1990-4-38, 1990-4-39,...,1990-4-42
Object number: 1990-4-0043
Carl G. Barth
Date: circa 1921
Accessories: possibly to be used with jigs 1990-4-38, 1990-4-39,...,1990-4-42
Object number: 1990-4-0044
Carl G. Barth
Date: circa 1921
Object number: 1990-4-0085
Carl G. Barth
Date: dated 1921
Object number: 1990-4-0040
Carl G. Barth
Date: dated 1921
Object number: 1990-4-0041
Carl G. Barth
Date: circa 1921
Object number: 1990-4-0042
Carl G. Barth
Date: circa 1921
Object number: 1990-4-0086
Carl G. Barth
Date: circa 1921
Object number: 1990-4-0084
Carl G. Barth
Date: circa 1921
Object number: 1990-4-0088
See also/See also
