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A W Faber "Castell" 388
(50cm Scale Desktop rule, Electro)
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A W Faber "Castell" 388 (1929) |
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Summary
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System:
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Electro
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Specialization:
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Electrical & Mechanical Engineers
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Type:
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Closed frame
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Material:
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Pearwood
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Facings:
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Celluliod
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Scale Length:
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50cm
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No of Scales:
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11
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Front Length:
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572mm
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Front Width:
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32mm
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Language:
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English
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Origin:
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Bavaria
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Date:
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1929, May
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Features/Notes:
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Desktop rule.
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Scales (colours as shown)
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Front:
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LL2, A [ B, C ] D, LL3 |
Back:
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[ S, L, T ]
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Labels Left:
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-
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Labels Left:
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All, as scales
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Labels Right:
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-
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Labels Right:
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All, as scales
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Style:
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Railway track
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Typeface:
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Serif
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Extensions:
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-
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Decimals:
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As units between 1 & 2 on A, B, C & D
Units between 10 and 20 on A & B
0.5's as unit between 2 and 5 on C & D
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Gauge Marks:
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p (3.14) on A, B, C & D
M (1/p=0.318) on A & B
C (1.13) on C
C1 (3.57) on C
746 on A & B
W (3.32) on D
R (5.53) on D
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Rulers:
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cm on top edge
inch on bottom edge
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Features/Notes:
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Model 388 electro scale layout (DRGM 379365, 1924).
"Dynamo"/"Motor n=%" scale and "Volt" scale (DRGM 379366, 1924), labelled, in the well. Volt scale numbers and label in red.
Electrical resistance and power load (DRGM 881735, 1924) measured on the A scale.
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Construction
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Stock:
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2 part split stock joined with steel springs (DRGM 522689, 1912; DRGM 452965, 1911).
Braced with longitudinal metal strips (DRP 206428, 1908).
Tension adjustment screws in bottom edge (DRP 365637, 1922).
Left and right viewing cutouts with index marks, in back for reverse of slide.
Bevelled top edge, square bottom edge.
High cursor grooves both cut parallel to front face.
Shallow rebate in back .
Front, well, top and bottom edges celluloid faced, secured with wooden pins (DRGM 371190, 1908).
Length x Width x Height (mm) - 572 x 39 x 13
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Slide:
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Double sided
Braced with longitudinal metal strips (DRP 206428, 1908)
Aluminium index edge at the left end (DRGM 247514, 1905) secured with two rivets.
Celluliod faced on both sides, secured with wooden pins (DRGM 371190, 1908)
Shorter than stock, front face length x width (mm) - 565 x 12
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Cursor:
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Aluminium frame, glass pane.
Square window.
Centre riveted steel spring on top runner.
Single central full length hairline.
Width x Height (mm) - 32 x 36
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Printing (colours as shown)
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Stock:
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"388" + scales logo + "A.W. FABER" + ""CASTELL"" between lying castles in the well above the split towards the right, sans-serif.
"D.R.PATENT. No 206428. No 365637." and underneath "D.R.G.M. No 881735" in the well below the split towards the right, sans-serif.
"MADE IN BAVARIA." on the top centre of the back, sans-serif.
"Quot. +1" and "Prod. -1" on the left and right ends respectively of the front lower stock rail, sans-serif.
"10 Amp." & "KW" at the left and right ends respectively of the A scale.
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Slide:
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"10 m 10 mm2" & "H.P." at the left and right ends respectively of the B scale.
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Cursor:
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-
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Labels:
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On back, paper table featuring conversions and mathematical and physical constants.
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Instructions
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None
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Box (colours as shown)
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Style:
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Travel case
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L x W x D mm:
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580 x 47 x 23
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Material:
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Leather
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Colour:
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Brown
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Construction:
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Fold over flap.
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Printing:
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None
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Labels:
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None
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Detail Images
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Click on the images for enlargements.
Click on the images for enlargements.
Click on the images for enlargements.
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