Sun-Hemmi
153
"Electrical Engineer's Universal Duplex Slide Rule With Patent
Vector Scale, Gudermanian Scale and Log Log Scales"
(1946-50)
slide rule
slide rule
Click to view 300 dpi image.

Virtual slide rule available.
ManufacturerSun-Hemmi
Model153
Serial No.none
Date Codenone
Scale length25 cm
Overall length32.0 cm
Width4.0 cm
Body/Slide materialsPlastic on Bamboo
Post materialsMetal
Cursor materialsMetal / Glass
Scales L K A [B CI C] D T Gθ
θ Rθ P [Q Q' C] LL3 LL2 LL1
AccessoriesBlack cardboard case; repaired with electrical tape
NotesPatent covering special scales
Hemmi manual fragment covering trig and hyperbolic functions
JOS article about Hemmi trig and hyperbolic scales
Tag No.SH-153
[Back]