Calculator
Object number2008.30.1 a,b
Made by
Walter J. Lyman
Datec. 1938
MediumWood; paper; ink; metal
Credit LineGift of Lois J. Lyman
DescriptionSystem calculator. Wooden palate with rectangular wooden sliding section on left and three wooden squares with sliding metal pointers. Each piece has graphs with handwritten numbers and words for energy mathematical calculations. System Calculator fits inside wooden box; embossed metal label on top has name of object. Metal hook in front.Dimensions(a) Width:6.75 ; Length: 9.75 ; Height: 1.375(b) W: 10.75 ; L: 7.65 ; H: 2.25
Inscriptions(b)
Embossed metal label on top, "SYSTEM CALCULATOR".
Historical NotesSystem Calculator handmade and used for calculating purposes for power generators at Duquesne Light. Invented by donor Lois J. Lyman's father-in-law, Walter J. Lyman, who was the Vice President of Duquesne Light from early 1950s until 1966. Lyman was a graduate of Carnegie Technical Institute in 1924.
Related institution
Carnegie Mellon University
Related institution
Duquesne Light Company
Terms
On View
Not on view
1970-1990
F. W. Woolworth Company
c. 1900
