Monroe publication 1045-S, instruction manual for the LN model of mechanical calculator. This is the September 1958 printing of the manual.

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Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 114, describing the fix for the KASC model mechanical calculator adding before shifting. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 376, describing a change from fibre washers to "dry" type washers in LA and MA model mechanical calculators to prevent uneven carriage shifts. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Instruction book for the Monroe MA series of electromechanical calculators. Also known as Form 878-S.

Topics: Calculator, Instructions, Monroe

Calculations and instructions for use with the obsolete Monroe electromechanical calculators, specifically, the model 8N.

Topics: monroe, monroe calculator, monroe machine, calculator

Advertisements from The World's Work, Advertiser section, possibly 1919.

Topics: Monroe Calculating Machine, Hammond Typewriter, The Edwards Mfg Co, Dickson School of Memory,...

Monroe Machine Service Bulletin No. 101, describing how to install and dismantle motors on the LA models of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 40E, describing some adjustments to the KAA models 1 and 2 of mechanical calculator. Note that there is a second MSB 40E that was published 18 months later. I have called that document MSB 40E prime. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 40F, describing some adjustments to the KAA models 1 and 2 of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 94, describing the setting of a mechanical calculator's universal motor between AC and DC input. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Ad by LaSalle Extension University about how J. L. Aldrich of Fargo, North Dakota, went from order clerk to district manager for the Monroe Calculating Machine Company. With quote from J. R. Monroe.

Topics: popular mechanics, monroe, lasalle

Form MO-96, a programming manual for the Monrobot XI general purpose computer. A general overview about this computer can be found on Wikipedia . This is the January 1964 edition.

Topics: computer, monroe calculating machine, monroe, monrobot

Monroe Machine Service Bulletin No. 24-B, illustrating parts used in improvements, additions and changes to the K series "2" and "2A" mechanical calculators up to 15 April 1926. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 106, describing the removal and reassembly of a more integrated motor power unit for LA mechanical calculators. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 284, describing the retrofit of a keyboard locking mechanism to the LA-5 and LA-6 models of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 440-D, a detailed description of the function, testing, adjustment, lubrication, and parts of the Monroe Calculating Machine Company's Monromatic CAA-10 calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, monroe

Article containing the text and slides of a slideshow given in May 1952 by George C. Chase, director of research at the Monroe Calculating Machine Company starting in 1917, about five years after the company started. The slides contains a overview of various mechanical calculators.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 48A, a supplement to MSB 40, containing the price list for parts and assemblies of the "3" series model mechanical calculator. The field office was instructed to destroy the "3" series parts and assembly list in MSB 48. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Publication B-154, covering basic algebra, and how to rearrange formulas for efficient calculation on a Monroe mechanical calculator.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 113, describing installation of insulation on a connector in the LA model mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 257, describing an adjustment for satisfactory shift of the carriage on LA-5 and LA-6 model mechanical calculators, after all other adjustments have been exhausted. This copy appears to be a reprint of an original document which, based on MSB numbering and dates, would have been originally published between 30 December 1935 and 26 June 1936. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating...

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Publication B-251, a better way to teach arithmetic with the Monroe Educator Calculating Machine.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 358, describing the adjustment for a condition where the LA-5 and LA-6 models of mechanical calculator would run continuously during automatic division and multiplication. This copy is an April 1946 reprint of the original 1940 document. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 112A, describing adjustments for the clear-out lock for KA "C" and "E" model mechanical calculators. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 285, describing the retrofit of an adjustable stop mechanism for the LA-6 model of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 257, describing an adjustment for satisfactory shift of the carriage on LA-5 and LA-6 model mechanical calculators, after all other adjustments have been exhausted. This copy appears to be a reprint of an original document which, based on MSB numbering and dates, would have been originally published between 30 December 1935 and 26 June 1936. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating...

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 238, describing an issue with the registering dials on LA-6-W and LA-6-C model mechanical calculators which can be solved with changed parts. This copy appears to be a reprint of the original 1935 document. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 244, describing a change to the through-carry unit and automatic multiplication mechanism of the LA-6-200-C mechanical calculator. The change was not to be retrofitted to existing models. This copy is a reprint from February 1946 of the original 1935 document, but without color. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 238, describing an issue with the registering dials on LA-6-W and LA-6-C model mechanical calculators which can be solved with changed parts. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 48, describing the difference between K "3" series and other K model mechanical calculators. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Pages 3 and 4 of a Monroe Calculating Machine Company newsletter from May 1971. Page 4 in particular describes the history of the L model mechanical calculator, from 1929 to 1971.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 420-A, describing the functions of, and how to disassemble, reassemble and lubricate, the L-160-X and L-200-X models of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 40N, describing some adjustments to the KAA models 1 and 2 of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 40G, describing some adjustments to the KAA models 1 and 2 of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 116-A, supplementing plate #12 in MSB 116. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 288, describing the retrofit of a locator arm mechanism on the LA, LA-5 and LA-6 models of mechanical calculator for prevention of stopping off-center. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Instruction book for the Monroe KA series of electromechanical calculator. Also known as Form 660 S. Originally printed 1928, this copy is a reprint edition from 1943.

Topics: Calculator, Instructions, Monroe

Monroe Publication 1250-A, a sales brochure for the Monroe 820, 920, 950, 990, 570 and 150 electronic calculators. Unknown year, but probably the 1970s.

Topics: calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 507, describing a change in color scheme for the LA-7 and LN models of mechanical calculator . The "color coding" referred to shows what color each exterior part is by symbols. Also gives the part numbers and list prices for each such part. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Book 4 of 6 of a service training manual for the Monroe Calculating Machine Company. Download the file to see the foldouts at the end -- the Archive's viewer doesn't seem to be able to handle different-sized pages very well. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 50, collecting all changes in design and new features in the K model mechanical calculator up to date. There is no cover letter in this copy of the bulletin, but the date is estimated to be between May and December 1927 based on the dates of surrounding bulletins. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 358, describing the adjustment for a condition where the LA-5 and LA-6 models of mechanical calculator would run continuously during automatic division and multiplication. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 430, describing a washer being added to the LA-5 and LA-6 models of mechanical calculator to prevent prevent misalignment of parts after automatic division. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 205, instructions for installing condensers for DC motors on the LA, MA, and Gardner mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 125, describing four improvements to KAS, KAA, C and E model mechanical calculators. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 161 Supplement C, the fourth installment describing the functioning and adjustment of the LA-6 model mechanical calculator. Other supplements contain further description. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 516, cataloging all parts used in gN-162 and 6N-212 models of mechanical calculator, with part numbers and prices. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Book 2 of 6 of a service training manual for the Monroe Calculating Machine Company. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Notes made by one M. H. Hitchcox on Monroe Service Bulletin 440-D pages 102 through 113, with a two-page annex not included in the MSB consisting of points to check in setting up CAA-10s.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Advertisements from Railway Age Gazette, June 22, 1917. Pages 25 and 26.

Topics: Monroe Calculating Machine Co, Nicholson File Company

Article in Joe Mitchell Chapple's National Magazine, Apr 1919, about the Monroe Calculating Machine Company and Jay Randolph Monroe.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe, national magazine, joe...

Monroe Publication B-243, about a study performed by Dr Howard F Fehr on whether the use of calculators in the classroom made students enjoy arithmetic more.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 165, describing the functioning and retrofitting of a locking mechanism to the LA-6 model mechanical calculator. The locking mechanism prevented the multiplication lever from being operated when the carriage was in the first or second position. The company wanted all existing and new LA-6 calculators to be retrofitted with this modification. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating...

Topics: calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 40P, describing some adjustments to the KAA models 1 and 2 of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 95C, the illustrated parts and assemblies price list for the L model of mechanical calculator. The models covered are: L 1207 L 160 and L 200 LA 160 and LA 200 L 160-X and L 200-X LA 160-X and LA 200-X This MSB obsoleted and superseded MSB95 and MSB95A, and so ordered that they be destroyed. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 193, describing some adjustments for specific problems. This is a June 1945 reprint of the original 1934 document. Based on comparisons of other reprints, this document was most likely generated from the original mimeograph masters with the exception of a small reprint notice. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 177, describing the functioning and retrofitting to the LA-5 and LA-6 model mechanical calculators of an improved division lever return mechanism. The company wanted all existing and new LA-6 calculators to be retrofitted with this modification. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 195, describing new adjustment instructions for the LA-6-W model of mechanical calculators. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Photo, February 1946, of the Monroe Calculating Machine Company factory on Boylston and Exeter in Boston, Massachusetts. Taken standing on the east side of Exeter street facing north. Also contains Huntt's Cafeteria on the ground floor and the Exeter Street Theatre.

Topics: monroe calculator, monroe machine, monroe calculating machine company, factory, huntt's cafeteria,...

Press photo, September 9, 1930 at the Monroe Calculating Machine Company.

Topics: monroe calculator, monroe machine, monroe calculating machine company

Advertisements from Railway Age, June 14, 1920. Pages 39 and 40.

Topics: Monroe Calculating Machine, L C Chase & Co, The American Automatic Connector Co, Mohawk...

Monroe Machine Service Bulletin No. 108-A, description and retrofit instructions for plus, minus, and shift key locks on KAE and KASC model mechanical calculators. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe publication GS-713, instruction manual for the Simplex Electric Models 410-11-011 and 408-11-011 mechanical printing adding machines.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Form 991-S, a table of dividing factors for square roots, along with instructions for use. See also: 994-S (Table of multiplying factors for square roots) 769-S (Machine methods for the extraction of square root) 1191-S (Simplified methods for extracting roots) 1228-S (Simplified method for extraction of square root)

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 36, 36A and 36B, covering details about AC and DC motors used in the K models of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 40D, describing some adjustments to the KAA models 1 and 2 of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 100-C, specifying changed voltage range for a motor used in the LA model of mechanical calculator. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 230, indexing adjustments to LA-6, MA-4 and MA-5 mechanical calculators. Shows issue versus Machine Service Bulletin where the adjustment for the issue appears, up to 1935. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, mechanical calculator, monroe calculating machine, monroe

Monroe Machine Service Bulletin No. 429-A, describing how to install the revised plus and minus key mechanism. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 40E, containing a parts a price list for full automatic and 3-series model K machines. This list was intended to obsolete the list originally provided in MSB40 and MSB48. Note that there is a second MSB 40E that was published 18 months earlier. I have called that document MSB 40E. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Service manual for the Monroe Calculating Machine Company's obsolete data/log printer, model MC 10-40. The MC 10-40 was a 16 columns electromechanical printer printing on a continuous paper strip. The characters it could print were digits 0-9, A, B, -, +, and a dot.

Topics: printer, schematics

Press photo, October 3, 1945, at the Monroe Calculating Machine Company in Newark, New Jersey.

Topics: monroe machine, monroe calculator, monroe calculating machine company, strike

Monroe Machine Service Bulletin No. 130, stating that extra manual crank handles for the automatic MA mechanical calculator should be sent back to the main office. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe Machine Service Bulletin No. 24, illustrating the assembly and adjustment of K series "1" and "2" mechanical calculators. This copy was scanned from a set of documents originally kept at the Toledo, Ohio branch of the Monroe Calculating Machine Company.

Topics: calculator, monroe calculating machine, mechanical calculator, monroe

Monroe publication B-102, an office practice course using the Monroe LN Educator mechanical calculator. This copy is the 26th printing, Dec 1961.

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