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DENNERT & PAPE ( ARISTO )
MANNHEIM POCKET ( 12.5 cm Scales )
( ARISTO-Werke ) Dennert & Pape, Hamburg / Germany (1929)
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VERSION (A)
S C A L E S of the DENNERT & PAPE MANNHEIM POCKET
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Front Side Back Side
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( 0 ... 13 cm Ruler )
A X2
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B X2 S sin(0.01X); sin(0.1X)
L lgX
C X T tan(0.1X)
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D X
( 0 ... 5" Ruler )
R E M A R K S : ( 1° = 60' ; 1' = 60" )
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The TRIGONOMETRIC SCALES are divided in MINUTES & SECONDS
S keyed to A/B ; T keyed to C/D
VERSION (A)
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This old model is made of mahogany with scales on celluloid
veneer. For the manufacturer the engravements in the bottom
»D&P« and »29« could be interpreted as "Dennert & Pape"
and "1929". Ref. to the print on the back side and on its
leather cover, this old Pocket Slide Rule was a gift from
the constructor company » WAYSS & FREYTAG A.-G., DRESDEN «
well known for their engagement in reinforced concrete.
Because the original cursor was missing, there is a home-
made of aluminum with a window of PVC from a CD case. The
hairline is made with a »X-ACTO« and colored with a marker.
Historical Remarks ...
VERSION (B)
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There is NO Year Code - The engravement in the bottom reads
» DENNERT & PAPE ALTONA « The CURSOR has a print »PERTODO«
May be the Pocket SR was a gift from this company ?
The picture from the side shows construction details: The
mahogany strips are glued on the celluloid base - and the
glass of a "Frameless Cursor" has grooves for the clips ...
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... The SCALES got EXTENTIONS in RED right and left
and have lost the historical "Ladder" pattern.