Images(7)

Rule, Slide

Object number2012.125.1 a-k

Manufacturer J. R. Dempster

Manufacturer Eugene Dietzgen Company

Datec. 1933

OriginBerkeley, CA

Possible OriginChicago, IL

Possible OriginNew York, NY

Mediumplastics; metal; paper; glass; leather

Credit LineGift of Michael J. Haraburda

DescriptionRotarule slide rule consisting of rule, magnifying glass, role pin punch, flattened spring, brown leather case, directions card, for directions booklets, and paper packet for booklets.Dimensions(a) Width: 5.125; Length: 6; Depth: .5
(b) Height: 3.5 ; W: 1.75 ; Dp: .25
(c) L: 3.125 ; W: .375
(d) H: .75 ; W: .875
(e) H: 6 ; W: 5.75 ; H (opened): 9.125
(f-j) H: 6; W: 4.5
(k) H: 6.5; W: 5

Inscriptions(a)
Measurements/scales on both sides.

(g)
"Part 1".

(h)
"Part 2".

(i)
"Part 3".

(j)
"Part 4".
Marks(a)
Print on center of obverse "THE ROTARULE / TRADE MARK / A 50-INCH POCKET "SLIDE RULE" / PATENTS / 1849058, 1868816 / COPYRIGHT 1933 BY J.R. DEMPSTER, MANUFACTURER, BERKELEY, CALIFORNIA, U.S.A.".

(e)
Gold print on opening flap "EUGENE DIETZGEN COMPANY / DISTRIBUTORS / CHICAGO NEW YORK" and bottom edge "PROTECT FROM SUN AND HEAT".

(f)
Obverse, "FRICTION ADJUSTMENT / OF THE / ROTARULE" and reverse, "LUBRICATION / OF THE / ROTARULE".

(k)
Label attached to front "One Set of / DIRECTIONS / for using the / ROTARULE / TRADE MARK / (Model AA)". PRinted on bottom edge, "Copyright 1929 by J.R. Dempster".
Historical NotesGulf Research slide rule.

Related institution Gulf Oil Corporation (1907 - 1984)

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