Hyperbolic Match Output

Number:49

Maker:HEMMI (Japan)

Model:Duplex Slide Rule No. 275D (For Advanced Electrical Engineer)

PHOTO

Scales Front: || L, K, DF || CF, CIF, CI, C || D, LL3, LL2, LL1 ||

Scales Back: ||Sh1, Sh2, Th, A || B, TI2&TI2, TI1&TI1, SI&SI, C || D, DI, X, Θ || X is radians; Θ degrees.

Gauge Marks: π is on CF and DF and π/2 is on X; Mark c is on back scale C.

Cursor Front:

Cursor Back;

Construction: 50cm.; Plastic face on laminated wood ; Cursor is framed. Adjustable metal brackets.

Date: 1963+

Source: http://www5b.biglobe.ne.jp/~tomozawa/sr-annex/cat/hemmi/hemmi-275d/hemmi-275de.htm

Information: Rule has two cursors.