Inside the Millionaire
View 3 - The Rack Gears

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"These rack gears live directly below the input sliders. The position of the input slider moves the cog forward on a square shaft (note numbers engraved on the face of the normally hidden wheels to rear of cogs). Each rack gear is shifted to the right by a pin on the direct multiplier table assembly, which in turn rotates a gear that turns a square shaft and delivers a number to the carriage. " Jim McDermaid

Photos: Courtesy of Jim McDermaid

X-Number World of Calculators