Calculagraph, Manual; Unknown Maker; Unknown; ZLB.3744
Calculagraph, ManualAbout this object
This is a manual calculagraph. The wind up calculagraph, invented in 1888 by 38 year old clockmaker Henry Abbot, was first used in telephony for timing toll calls in 1894. Calulagraphs were used in New Zealand telephone exchanges for 90 years.Maker
inorganic, processed material, metal, alloy, brass
inorganic, processed material, metal, alloy, steel
inorganic, processed material, metal, nickle
inorganic, processed material, synthetic, plastic
inorganic, processed material, glass
Engraved on the front: 'CALCULAGRAPH 679 408 697 427 US. PATENTS NO.S 424.291 424.292 449.192 583 320 TRADE MARK SEPT 13 - 1892 NO 21747
PUT CARD IN HERE
AND EUROPEAN PATENTS 10614'.
h 230 mm x w 250 mm x d 230 mmSubject and Association Keywords
This object is from
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