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Barrett 6 adding machine

Barrett 6
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Barrett 6

This Barrett 6 is a relatively compact adding machine made in 1913. It has 6 columns of keys with a 6-digit register at the front. You enter a number on the keyboard, the keys stay depressed, and when you then pull the large lever on the right hand side the entered number is added to the register and the keys are released, ready for the next addition.

There is a Repeat button to the left of the keyboard with which you can disable the automatic clearing of the keyboard, allowing you to do repeated additions. The key top is missing on my machine. The top button of the left column of keys is not a 9 but is used for clearing the keyboard manually. The red button on the side of the large lever will also clear the keyboard, and if it is held down while pulling the crank then the main register is reset to zero.

There is a small metal switch between the fourth and fifth column of keys, counting from the right. Shifting this switch to the left activates the item counter. Every time the lever is pulled, 1 is added to the fifth column, allowing you to use the left two columns for counting the number of items that are added together and whose sum is in the right four columns. Carries from the fourth to the fifth column are suppressed.

Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine

The lever be removed simply by pulling it out. The case is held with 10 screws; 2 on top and 8 around the sides. Note however that to lift off the case, the tip of the axle lever must be unscrewed, and similarly, the top of the Repeat key and the tip of the item counter lever must be detached to clear the way.

The serial number of this machine is 9038-2, which can be found on the bottom of the base plate. The internal frame carries a different number.

Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine
Barrett 6 adding machine



The Barrett is named after its designer, Glenn J. Barrett. At first he designed typewriters, working for Fox Typewriter Company in Grand Rapids, and then in 1904 he set up the Barrett Typewriter Company to produce his own typewriter. He then left typewriters behind and designed an adding machine, and in 1910 set up the Barrett Adding Machine Company to produce them. In 1912 the company moved to Philadelphia because that is were he found more financial backing. The company was essentially refounded there with new management, though the factory stayed in Grand Rapids till 1919 when it too was relocated to Philadelhia. Glenn Barrett continued developing the Barrett adding machines for several years, but eventually left the company to become a consultant to other adding machine companies such as Burroughs. In 1922 he once again designed an adding machine and set up the Portable Adding Machine company to make it, though in 1924 it was acquired by Corona (later Smith-Corona) and the machine was renamed the Corona adding machine.

The Barrett Adding Machine Company was acquired by the Lanston Monotype Machine Company in 1922. The latter was founded in 1887 by Tolbert Lanston, an inventor of printing machines. He was particularly known for having developed hot metal typesetting, and a system for justifying text to completely fill a line. His company continued to make printing machines even after his death in 1913. Not long after acquiring Barrett, Lanston Monotype reduced the range of Barrett models to be more manageable, and focussed on just the two main model types. These two models were developed further. The last adding machine model went on the market in 1959. The company still exists today as Monotype Imaging, and owns the copyrights of many well-known fonts.


Full keyboard machines

The first models were the non-listing adding machines with 6 or 10 columns. These were marketed as being very portable machines, especially compared to the competition. To allow multiplication a "Mezzanine attachment" was optionally added to the model 10, which was a narrow keyboard that could shift left or right over the normal keyboard so that input entered once on the attachment could be applied repeatedly at any column on the underlying keyboard.

All remaining models with a full keyboard were listing machines. These came in two kinds - standard adding machines based on model 9, and those based on model 12 which can shift the input register to the left to allow multiplication. In 1924 Lanston discontinued all models except the 9 and 12. From then on they essentially stuck to those two models (or their successors), later in both manual and electric drive.

Non-listing machines
6 6x6 1910-1924
10 10x101910-1924As model 6 but larger capacity
10A/10X10x101913-1924Mezzanine attachment.
Listing machines
12 9x12 1914-1935Multiplication.
14 9x12 19??-1924As 12 but with wide paper carriage.
5 5x6 1921-1924
7 7x7 1921-1924Also variants with quarters, eighths.
7A 7x8 1921-1924
9 9x9 1921-1935Also variants with quarters, eighths.
9A 9x10 1921-1935
9B 9x11 1921-1935
9C 9x12 1921-1935
82A 8x9 1935-1940Subtraction.
82AE 8x9 1935-1940Subtraction, Electric.
122 9x12 1931-1940Subtraction, Multiplication.
122E 9x12 1931-1940Subtraction, Multiplication, Electric.
821A 8x9 1940-19??Subtraction.
831AE 8x9 1940-19??Subtraction, Electric.
1221 9x12 1940-19??Subtraction, Multiplication.
1221E 9x12 1940-19??Subtraction, Multiplication, Electric.

The table above is not complete. There appear to have been variants with model numbers 61, 83A, 90, 91, 92A, 123, and 193, most in manual and electric versions but it is unclear how they differ from the above.

10-key machines

In 1938 Lanston introduced 10-key machines, which they often called Figuring machines. The A series did not print, the B series did. The dates in the table below are questionable, and I am unsure what the exact differences between the models are.

Non-listing machines
A-9 9x91938-
A-19 9x91941-
Listing machines
B-6 6x61938-
B-7 7x71938-
B-9 9x91938-
B-17E 7x71942- Electric
B-18 8x81950-
B-19E 9x91947- Electric
B-29E 9x91941- Electric
B-192 9x91948-1953Subtraction
B-192E9x91948-1953Subtraction, Electric


1910-1912 Barrett, Grand Rapids

1904-05-12 American Machinist
1904-11 Office Appliances
1905-08 Office Appliances
1910-07 Catalogue of copyright entries
1910-10 Office Appliances 3
1910-10 Office Appliances
1910-11 Office Appliances
1911-08 Office Appliances
1911-11 Office Appliances 1
1912-02 Office Appliances 1
1912-02 Office Appliances 2

1912-1921 Barrett, Philadelphia

1912-10 Office Appliances
1913-06 Office Appliances 2
1913-10 Office Appliances 3
1913-11 Office Appliances 2
1914 Modern instruments and methods of calculation
1914-04 Office Appliances
1914-05 Office Appliances
1914-09 Office Appliances
1914-10 Office Appliances
1915-08 Office Appliances
1916-04 Office Appliances 2
1919-01 Office Appliances 2
1919-03 Office Appliances 2
1920-02 Office Appliances 2
1920-02-21 Advertising and selling
1920-07 Office Appliances 1
1921 Orga-Handbuch - barrett 1
1921 Orga-Handbuch - barrett 2
1921 Orga-Handbuch - barrett 3
1921-01-17 Evening Public Ledger (Philadelphia Pennsylvania)
1921-12 Office Appliances 2
1921-12 Office Appliances
1922-01 Office Appliances

1922-1959 Lanston, Philadelphia

1922-01-21 The Commercial and financial chronicle
1922-02 Ben Franklin monthly 2
1922-02 Office Appliances
1922-05 Office Appliances
1922-06 Office Appliances
1922-08 Office Appliances
1922-12 Office Appliances
1923-08 Office Appliances
1924 The American Digest Of Business Machines 1
1924 The American Digest Of Business Machines 2
1924-05 Monotype A Journal of Composing Room Efficiency
1924-10 Office Appliances
1924-12 Office Appliances
1925 Ernst Martin 1
1925 Ernst Martin 2
1925 Ernst Martin 3
1925 Ernst Martin Barrett 4
1926-07 Office Appliances
1927-08 Office Appliances
1930 Organisations-Lexikon
1931 Moderne Buero-Maschinen
1931-06 Office Appliances
1931-09 Office Appliances
1931-11 Office Appliances
1935-08 Machine Design
1935-10 Office Appliances
1938-06 The Photo-Lithographer 1
1940-11 Office Appliances
1940-12 Geyer's Office Equipment Digest
1940-12 Office Appliances 1
1941-01 Office Appliances 1
1941-04 Office Appliances 1
1941-06 Geyer's Office Equipment Digest
1941-07 Geyer's Office Equipment Digest
1941-07 Office Appliances 1
1942 Mechanische hulpmiddelen in de administratie
1942-03 Office Appliances
1946-04 Office Appliances
1948-02 Bankers' Monthly
1948-10 Office Appliances 1
1949-06 Office Appliances 1
1949-07 Office Appliances 1
1949-11 Office Appliances 1
1949-12 Office Management and Equipment
1950-04 Office Appliances
1950-09 Office Management and Equipment
1951-08 Office Management and Equipment
1953-03-11 Meriden Record (Connecticut)
1953-04 The Paper Industry
1953-08 Office Management
1954-08 Office Management
1967 Commodore Annual Report


1910-1912 Barrett, Grand Rapids

1910-10 Office Appliances 2
1910-11 Office Appliances 2
1910-12 Office Appliances
1911-01 Office Appliances 2
1911-02 Office Appliances
1911-03 Office Appliances
1911-04 Office Appliances
1911-05 Office Appliances
1911-07 Office Appliances
1911-07-11 The Washington Post (Washington DC)
1911-09 Office Appliances
1911-10 Office Appliances
1911-11 Office Appliances 2
1911-12 Office Appliances
1912-01 Office Appliances 1
1912-02 Office Appliances 3

1912-1921 Barrett, Philadelphia

1912-12-08 Star Tribune (Minneapolis Minnesota)
1913-01 Office Appliances
1913-04 Office Appliances
1913-04-19 The literary digest
1913-05 Office Appliances
1913-05-17 The literary digest
1913-06 Office Appliances 1
1913-07 Office Appliances
1913-10 Office Appliances 1
1913-11 Office Appliances 1
1913-11-06 The Wall Street Journal (New York)
1913-11-12 The Wall Street Journal (New York)
1913-12 Office Appliances
1913-12-10 The Wall Street Journal (New York)
1914-01 Office Appliances
1914-02 Office Appliances
1915-03-06 The Saturday Evening Post
1915-03-12 Evening Public Ledger (Philadelphia Pennsylvania)
1915-04-03 The Saturday Evening Post
1915-04-07 The New York Times (New York)
1915-05-01 The Saturday Evening Post
1915-06-12 The Saturday Evening Post
1915-09-23 The Sun (New York)
1915-09-28 The New York Times (New York)
1915-11-05 The New York times (New York)
1915-12-07 The New York Times (New York)
1915-12-10 The New York Times (New York)
1915-12-15 The New York Times (New York)
1916-02-16 Evening Public Ledger (Philadelphia Pennsylvania)
1916-04 Office Appliances
1916-10-18 Boston Post (Massachusetts)
1916-10-22 Boston Post (Massachusetts)
1916-10-23 The Evening Sun (Baltimore Maryland)
1916-12-29 Evening Public Ledger (Philadelphia Pennsylvania)
1917-07 Office Appliances
1917-08 Office Appliances
1917-08-22 Arkansas Democrat (Little Rock Arkansas)
1917-09 Office Appliances
1917-10 Office Appliances
1917-11 Office Appliances
1917-12 Office Appliances
1918-01 Office Appliances
1918-02 Office Appliances
1918-02-15 Evening Public Ledger (Philadelphia Pennsylvania)
1918-03 Office Appliances
1918-04 Office Appliances
1918-06 Office Appliances
1918-06 The Journal of Accountancy
1918-06-20 Manufacturers Record
1918-07 Office Appliances
1918-08-15 The New York Times
1918-11 Office Appliances
1919-01 Office Appliances
1919-02 Office Appliances
1919-03 Office Appliances 1
1919-04 Office Appliances 2
1919-05 Office Appliances
1919-06 Office Appliances
1919-07 Office Appliances
1919-08 Office Appliances
1919-09 Office Appliances
1919-09-30 The Courier Journal (Louisville Kentucky)
1919-10 Office Appliances
1919-10-18 De Sumatra post
1919-12 Office Appliances
1920-01 Office Appliances
1920-02 Office Appliances 1
1920-03 Office Appliances
1920-04 Office Appliances
1920-05 Office Appliances
1920-06 Office Appliances
1920-07 Office Appliances
1920-09 Office Appliances
1920-10 Office Appliances
1920-11 Office Appliances
1920-12 Office Appliances

1922-1959 Lanston, Philadelphia

1922-01 Canadian printer and publisher
1922-02 Office Appliances 2
1922-05 The Inland Printer
1923 The World almanac and book of facts
1923-12 The Inland Printer
1926-12 Office Appliances
1927-03 Office Appliances
1930-08-13 De Sumatra post
1931-04-15 De Sumatra post
1940-07 Geyer's Office Equipment Digest
1940-08 Geyer's Office Equipment Digest
1940-09 Geyer's Office Equipment Digest
1940-12 Office Appliances 2
1941-01 Office Appliances 2
1941-03 Office Appliances
1941-04 Office Appliances 2
1941-07 Office Appliances 2
1947-08 Office Appliances
1948-04 Office Appliances
1948-12 Office Appliances
1949-01 Office Appliances
1949-07 Office Appliances 2
1949-08 Office Appliances
1949-11 Office Appliances 2
1950-08 Office Appliances
1950-09 Office Appliances
1951-01 The Office
1951-04 The Office
1951-07 Office Appliances
1951-10 Office Appliances
1953-01 Office Appliances
1953-05-23 Business Week
1959-01-23 Fort Worth Star Telegram (Texas)
1959-02 The New York Certified Public Accountant


PatentFiling datePublish dateNameDescription
US 976,336 03-01-191022-11-1910Glenn J. BarrettAdding machine
   See also: FR 320,783, GB 1910/30,391
US 994,238 07-06-191006-06-1911Glenn J. BarrettCarry mechanism
US 1,000,36307-06-191015-08-1911Glenn J. BarrettActuating mechanism
US 1,003,08607-06-191012-09-1911Glenn J. BarrettAdding machine
US 1,003,41429-05-191119-09-1911Glenn J. BarrettRotary retarding mechanism
US 1,017,84329-05-191120-02-1912Glenn J. BarrettCarry mechanism
US 1,023,23524-06-191116-04-1912Glenn J. BarrettRegister locking and unlocking mechanism
US 1,108,11815-08-191125-08-1914Glenn J. BarrettActuating mechanism
US 1,108,11914-10-191225-08-1914Glenn J. BarrettItem counter
US 1,127,95304-02-191309-02-1915Glenn J. BarrettPunctuation device
US 1,130,46319-04-191302-03-1915Glenn J. BarrettOperating handle
US 1,173,64014-10-191229-02-1916Glenn J. BarrettAuxilliary keyboard
US 1,326,56422-09-191530-12-1919Glenn J. BarrettAdding listing machine


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