pictures

Monroe (1911)

"The Monroe emerged, so to speak, from the Baldwin Calculator (see Baldwin 1875). The designer of both machines is Frank Stephen Baldwin who was in his late seventies when he set out on his new job. His work was instigated by J . R. Monroe from whom the machine derived its name and who actively participated in the making of the first machine.

No details are available with regard to the first three models, which were only manufactured in small numbers. Model D appeared in 1915, model E in 1916, model F in 1917, model G in 1919; then in 1921 the present model K appeared."

Literature & links

John Wolff: Monroe Full-keyboard Rotary Calculator, Model K

model 6 N 162

manufacturer: Monroe Calc.Machines, Amsterdam, NL

	principle	divided stepped drum
	capacity	8 (w/o cr) x 8 (w tc) x 16
	input	full keyboard
	prod. years
	mach. built
	features	electric
	dimensions
	weight
	known s/n	1,346,013

		for bigger and more pictures, click on the picture

source: A.Devaux

parts catalog for the Monroe 6N-162 and 65N-212 source: Ite Weide

model 66 N 213

manufacturer: Monroe Calc.Machines, Amsterdam, NL

	principle	divided stepped drum
	capacity	10 (w/o cr) x 10 (w tc) + 11 (w/o tc) x 21
	input	full keyboard
	prod. years	ca. 1950 - 1970
	mach. built
	features	electric, fully automatic, storage and factor register
	dimensions	37 x 36 x 20 cm
	weight	15 kg
	known s/n	J 620,713

		for bigger and more pictures, click on the picture

source: A.Devaux

model CM-8 / CM-10

manufacturer: Monroe Calc.Machines, Amsterdam, NL

	principle	divided stepped drum
	capacity	8 (w/o cr) x 8 (w/o tc) x 16 10 (w/o cr) x 10 (w/o tc) x 20
	input	full keyboard
	prod. years	ca. 1960 -65
	mach. built
	features	electric, autom.multiplication, stop division, 8/10 digit factor storage
	dimensions	35 x 29 x 20 cm
	weight	11 kg
	known s/n	B101,929

		for bigger and more pictures, click on the picture

source: A.Jeanroy

model CSA-10

manufacturer: Monroe Calc.Machines, Amsterdam, NL

	principle	divided stepped drum
	capacity	10 (w/o cr) x 10 (w/o tc) x 20
	input	full keyboard
	prod. years	ca. 1956
	mach. built
	features	electric, fully automatic
	dimensions	35 x 29 x 20 cm
	weight	11 kg
	known s/n	210,659 , 627,261

		for bigger and more pictures, click on the picture

source: A.Jeanroy

model K

	principle	divided stepped drum
	capacity	various, example 8 (w/o cr) x 8 (w/o tc) x 16
	input	full keyboard
	prod. years	since 1921
	mach. built
	features
	dimensions
	weight	14 kg
	known s/n	94,864

		for bigger and more pictures, click on the picture

source: H.Bodahl

model L

	principle	divided stepped drum
	capacity	8 (w/o cr) x 8 (w/o tc) x 16
	input	full keyboard
	prod. years	since 1930
	mach. built
	features
	dimensions	29 x 24 x 9
	weight	4 kg
	known s/n	346.741

		for bigger and more pictures, click on the picture

source: A.Jeanroy

model L160-X

manufacturer: Monroe Calc.Machines, Amsterdam, NL

	principle	divided stepped drum
	capacity	8 (w/o cr) x 8 (w tc) x 16
	input	full keyboard
	prod. years	1950 - 1964
	mach. built
	features
	dimensions	28 x 26 x 10
	weight	4 kg
	known s/n	665,089

		for bigger and more pictures, click on the picture

source: R.Fedeli

model LA 5 - 160

	principle	divided stepped drum
	capacity	8 (w/o cr) x 8 (w/o tc) x 16
	input	full keyboard
	prod. years	since 1930
	mach. built
	features	electric, autom.division
	dimensions	30 x 28 x 17
	weight	7 kg
	known s/n	434,533

		for bigger and more pictures, click on the picture

source: A.Jeanroy

model LA 7 - 160

manufacturer: Monroe Calc.Machines, Amsterdam, NL

	principle	divided stepped drum
	capacity	8 (w/o cr) x 8 (w tc) x 16
	input	full keyboard
	prod. years	ca. 1958 - 1970
	mach. built
	features	electric, autom.division
	dimensions	31 x 30 x 17 cm
	weight	7 kg
	known s/n	J716,144

		for bigger and more pictures, click on the picture

source: A.Jeanroy

model LN - 160X

manufacturer: Monroe Calc.Machines, Amsterdam, NL

	principle	divided stepped drum
	capacity	8 (w/o cr) x 8 (w tc) x 16
	input	full keyboard
	prod. years	ca. 1960
	mach. built
	features
	dimensions	28 x 26 x 10 cm
	weight	3.5 kg
	known s/n	B550,966

		for bigger and more pictures, click on the picture

source: R.Fedeli

model Mach 1.07

manufacturer: Monroe Calc.Machines, Amsterdam, NL

Mark Glusker: "This machine was originally produced by Oerlikon of Switzerland as the Ultra 804. Monroe purchased the rights to the design and produced it in their Holland factory. It features high speed (800 rpm) multiplication, although division cycle speeds are much lower. Late in the 1960’s this machine was restyled and sold as the Monroe 570."

literature: Anthes, E.: Dr. Ing. Gustav Schenk - Konstrukteur des druckenden Vierspeziesautomaten "Ultra 804" (Mach 1.07) in: Von Menschen und Maschinen (Hrsg.: DBS), Essen, 1993, S.42 f.

	principle	pin wheel and tooth rack
	capacity	10 (w/o cr) x 11 (w/o tc) x 15
	input	10 keyboard
	prod. years	1962 - 1972
	mach. built	ca. 400,000
	features	electric, fully automatic, printing
	dimensions	25 x 40 x 16 cm
	weight	11 kg
	known s/n	B515,510

		for bigger and more pictures, click on the picture

source: A.Jeanroy

model 570

	principle	pin wheel and tooth rack
	capacity	10 (w/o cr) x 11 (w/o tc) x 15
	input	10 keyboard
	prod. years
	mach. built
	features	electric, fully automatic, printing
	dimensions	25 x 45 x 18 cm
	weight	13 kg
	known s/n	D000541

		for bigger and more pictures, click on the picture

source: A.Jeanroy

last updated: 19-Mrz-08