The Sensimatic developed into the Sensitronic which could store balances on a magnetic stripe which was part of the ledger card. It could store 9, 18 or 27 balances during the ledger posting operations and worked with a mechanical adder named a Crossfooter. The Company developed a range of adding machines with different capabilities and created the office accounting machine range that began with the Sensimatic, which had a moving programmable carriage to maintain ledgers. The company moved to Detroit in 1904 and changed its name to the Burroughs Adding Machine Company, in honor of Burroughs, who died in 1898.īurroughs grew into the biggest adding machine company in America, although by the 1950s it was selling more than the basic adding machines, including typewriters and computers. Louis, Missouri selling an adding machine invented by William Seward Burroughs. The Burroughs Corporation began in 1886 as the American Arithmometer Company in St.
Burroughs portable adding machine serial number serial number#
Antique Burroughs Adding Machine Serial NumberĪntique Burroughs Adding Machine Serial Number. I was wondering if you knew the age and how much it would be worth and if you knew any one that would be interested in buying it. I have a Burroughs adding machine serial number 5-1332940 in working order. For each large card, the split has to result in two magic squares : square grids filled with unique numbers and giving, per square, the same sum for all rows, columns and diagonals. That's no problem because they are marked with the Mystic Symbol that represents that number. Half of these cards will show the number-to-be-added (1, 2, 4, 8, 16, 32), but the other half will not. What would these magic squares have looked like ? We can try to split each card with 32 numbers from the magic trick box into two cards with 4×4=16 numbers. The Henry Ford does not own the Magic Squares that are mentioned in the instructions. By asking the audience member which cards contain the chosen number, and secretly the adding the first numbers of these cards, you get the chosen number.īut these cards are not squares, let alone magic squares. The first number of each cards indicates this bit: 1, 2, 4, 8, 16, 32. The trick is simple if you think of binary representations of the numbers: each card contains numbers that share a specific bit. The Henry Ford indicates that the machine was made by a Burroughs employee around 1950 as a o ne-off, but a Burroughs machine with the same properties is described in the catalog of the 1933 –1934 Chicago World Fair. (If You Depress a Wrong Symbol Key, Press the Magic Key and Start Over) The Machine Will Print the Number You Have in Mind. Repeat this Procedure - Pressing First the Proper Mystic Symbol and Then the Memory Bar - Until You Have Depressed all the Keys for the Squares in Which Your Number Appears. Find This Symbol on the Keyboard of the Mystic Number Machine, and Depress That Key. 
Locate the Magic Squares in Which Your Number Appears. The “The Henry Ford” collection contains a unique Burroughs adding machine: The Mystic Number Machine (figure 1) This printing adding machine has only 8 keys: a “Memory Bar”, a “Magic Key” and 6 keys with a strange symbol.
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