Hyperbolic Match Output

Number:96d

Maker:SHANGHAI (China)

Model:I-J Function Slide Rule

PHOTO

Scales Front: || ±G, ±Ii₁, I_m, 1/3X || 1/3X, ±J₁, J_m & J_m, C || D, LL3, LL2, LL1, L ||

Scales Back: || Th, Ch, K, A || B, T&T, ST&ST, S&S, C || D, DI, Sh₂, Sh₁ || (SHANGHAI is imprinted on Cursor)

Gauge Marks: π is on A, B, C, and D; π/4 is on A and B; v is on K.

Cursor Front:

Cursor Back: Has KW top middle, has mark HP(**) on right, and π/4 on left over A & B scales.

Construction: 25 cm.; Plastic; Cursor is not framed. Has fixed plastic end brackets.

Date: 1975

Source: WKR

Information:(The front scales are used to solve cubic and quartic equations. This SHANGHAI I-J Function Slide Rule was designed by Professor Lu Ya, Hefei Industrial University. Manufacturer is unknown as logo on rule is of unfamiliar design).