Locke Adder Antique Calculator

Locke Adder in Excellent Condition for its age. The Locke Adder was made by the C. Kensett, Iowa, and bears patent dates from 1901 and 1905. This adder was made circa 1901 and it is fully functional. The sliding metal rods are intact and work smoothly. The colours on the rods are still vibrant and show little if any discolouring. The adder has a metal base with grooves for nine sliding metal rods that move crosswise. Each rod represents a digit of a number being added. Protruding knobs on the rods represent different numerals. The rods are held in place by metal covers that extend over the right and left thirds of the instrument. When the device is in zero position, all the rods are in their rightmost position. Numbers are entered by sliding rods to the left, and the result appears in numbers immediately to the left of the cover on the right.

The base of it is covered with green cloth. The item "Locke Adder Antique Calculator" is in sale since Monday, December 14, 2020. This item is in the category "Collectables\Scientific Collectables\Scientific Instruments\Other Scientific Instruments".

The seller is "ramridge" and is located in Portsmouth. This item can be shipped worldwide.

Type: Scientific Instruments
Sub-Type: Calculators