Isotope Handling Calculator Mk III. Made by Abbot Brown of Beaminster, Dorset, Makers of Engraved and Printed Scales including Slide Rules and Rulers.
Aero Products CR-4
Aero Products Research, Time Speed Distance slide rule in the form of a Money Clip.
Alro 55-Nmmi. For Multiplication, Division and conversion between Inches and Centimetres
Alro 200R
Alro 300D
Alro 600E
Alro 1010, Commercial. From the estate of a former agent for Alro in Switzerland.
Alro Discabois System J.L.Brouhon
American Hydromath Co. Time-Distance-Speed Computer, Pitch-Speed-RPM Computer, Coasting Computer and Cross Drift Detector.
Aristo Aviat 617.
Aristo N623.
Aviation Supplies & Academics, Inc. ASA E6-B Flight Computer.
Blackburn Beverley C.A.R.P (Computed Air Release Point) Calculator
Blackwell Average Speed Calculator, Blackwell's Metallurgical Works Ltd., Thermetal House, Garston, Liverpool 19. Made By Abbott Brown, Beaminster.
Blundell Harling Ltd. Portland Dead Reckoning Calculator Patent. No. 1 530 487, Cat. No. 0655.33 (1084).
Blundell Harling Ltd, P.4883, Fujinon T.V.Lens Calculator.
Blundell Radiac N0 1 Ref. No. 6665-110060 Nuclear Bomb Effects Calculator. The top two pink discs are for calculating fallout on Land they can be turned over to show blue discs for calculating fallout at sea
Blundell Radiac N0 2 Ref. No. 6665-99-949-1446.
Blundell Gerry Decibel Calculator M615
Blundell Percentage Calculator M958
Blundell Decimal Percentage Calculator, P3430 made for Phillips with a cursor in the shape of a Light Bulb.
Blundell Reproduction Calculator M1158
Blundell Discount and Profit Calculator M2882
Bonwitt Slide Rule
BPB Instruments Resistivity Salinity Calculator
Breitling Circular Slide Rule used to show owners of Breitling Watches how the Slide Rule Bezel on their Watch functions. Its Quality and its Accuracy are Appalling.
British Railways Board Volume / Weight Calculator BR 1497
Circulator. Circulator Co. Ltd. London, N.W.9.
Concise, Imported and Supplied by Dargue Bros. Ltd. Halifax. This rule looks like an old version of the Concise 28. Dargue Brothers were the Manufacturers of the Simplon series of Slide Rules.
Concise 28N advertising Time-Life Books
Concise 32
Concise 270N
Concise 300
Concise 320. The trade mark of Takeda Drawing Instruments Mfg.Co.Ltd is on the cursor. The earliest possible year on the perpetual calendar is 1960, the latest is 1981.
Concise 380 Radio Computer
Concise Stadia Slide Rule
Hope 740 English-Metric Converter, Concise Co.Ltd, 2-16-23 Hirai, Edogawa-ku, Tokyo, Japan.
Concise Sama and Etani CTCS-552 Advertising Dowell Schlumberger. There is a list of Elements and a Celsius-Fahrenheit conversion scale on the back. Includes a Useful Constants and Data insert, Copyright 1966.
Concise Sama and Etani Radiological Tables and Circular Slide Rule. Anatomical Data on the back. The insert icludes half lives of radioactive isotopes, constants and formulae. Copyright 1966.
Concise Sama and Etani Model 600 CE with a Periodic Table of the Elements on the back. Includes Useful Constants and Data, CE insert Copyright 1968. Advertising Minnegasco, Minneapolis Gas Co.
Concise Sama and Etani Model 600 CE with a Periodic Table of the Elements on the back. Includes Useful Constants and Data, CE insert Copyright 1968. Property of U.S Government, 7520-00-926-2021, Slide Rule Type III Class 3
Concise Sama and Etani 200 EE Advertising Brown and Root Inc. There is a Reactance Nomograph on the back With insert EE. Copyright 1969.
Concise Sama and Etani DA-1 Especially Designed with inserts for Dresser Atlas. Resistivity of Saline Solutions nomograph on the back. This disc has two inserts, the Dresser Atlas, DA insert, Copyright 1971 and the Useful Constants and Data, CE insert Copyright 1968.
Concise Sama and Etani 1000 CE with an Addiator on the back.Includes Useful Constants and Data, CE insert Copyright 1968.
Concise Sama and Etani Model NL-1 Advertising Baroid. Drilling Mud data and calculations on the back. Mud Pump data and calculations insert NL, Copyright 1972.
Concise Weights and Measures Conversion Tables Type 26E. Includes Conversion Factors insert. Pat.No.381371.
Controller Mod. 75R, Controller Calculator K.G. Munchen 5, Jahnstrasse 19.
Controller Mod. 110R
Controller Mod. 200R
Corona 1
Czech Radiation Slide Rule.
Dalton Dead Reckoning Computer
Drayton Valve Sizing Calculator.
Dutch version of the Nuclear Bomb Effects Calculator
The Exchange Telegraph Yield Calculator published exclusively by The Daily Statistics Service of The Exchange Telegraph Co.Ltd. 64, Cannon Street, London, Tel:City 5700, Copyright, Designed and Produced Exclusively for the Exchange Telegraph Co.Ltd. by Concentric Indicator Laboratories. London and Slough, England.
Faber Castell 8/10. Sourced from Denmark.
G. Felsenthal & Sons. Chicago, Nautical Slide Rule, u.s.Navy Bureau of Ships, Manufacturer's Part No. FNS-3.
Fowler's Junior Type 4MJRG1 in Richard Blankenhorn and Robert de Cesaris' Catalogue Raisonne)
GC Profit Calculator.
Garbutt-Hatch Calculator
Gilson Binary Circular Slide Rule, 8.5" in diameter.
Dietzgen Gilson Circular Slide Rule
Golding Horse Power Computer for Steam Engines. Publishers, Charles Griffin & Co. Ltd. Exeter Street, Strand, London W.C. 1908
Hall's Clock Variations Calculator.
Hemmi Geotec 341-3910
Johnson and Phillips Ltd. Capacitor (kVAr) Calculator.
Kane Dead Reckoning Computer, Model MK-6B, Copyright 1957 Kane Aero Co. St.Paul, Minnisota.
Lee Sheet Steel Weight Calculator. Made by Smiths Calculators of Beaminster, Dorset.
Lovelace Nuclear Bomb Effects Computer.
Macbeth Illumination Calculator, Copyright in the United States and Canada, 1908, Copyright 1808 by Norman Macbeth. The Calculator includes scales for Horizontal and Vertical Illumination Angles, Normal Illumination Angles and Angles Determined by D/H. Norman Macbeth was the founder of the Macbeth Artificial Daylighting company in 1915, a company which still exists as a subsidiary of X-Rite Incorporated. Artificial Daylighting will be important to those Slide Rule Collectors (not me) who create high quality images of slide rules.
Maclean's Finance Calculator.
Memorex Magnetic Tape Calculator.
Multor
Norma Grafia 190, Germany
Perrygraf P200-10 Slide Rule advertising Carrier Air Conditioning Co. Syracuse, New York.
Pickett 101-C Lietz No.3625-10 Dial Rule
Pooley's Flight Equipment, Holding Pattern Calculator.
W.G.Pye & Co.Ltd RAF Course and Speed Calculator Mk IIA Serial No. 2095/39
Rota Easy Read Slide Rule, Instrumental Devices Ltd. London W.1.
Shaw Moisture Equivalent Chart and Pressure Calculator, Slide-Charts Britain Ltd. Abingdon, Oxon, OX14 3DH, England.
Circular Slide Rule GM Service School, Wellingborough, England. Smith's Calculators Ltd, beaminster.
Smith Chart
FXR Inc. Smith Chart and Circular Slide Rule
Speedivac calculator to determine the time to evacuate a vacuum system using a rotary pump. Edwards High Vacuum Ltd. Crawley, Sussex.
Water Flow Calculator for Staveley Spun Cast Iron Pipes.
Stephanus Computer for Vee Rope Drives.
Tina's Nystrom. Circular Slide Rule based on my guess concerning Nystrom's Calculator Design. There are Nystrom Calculators in the collections of The Royal Observatory Greenwich and in the National Museum of American History. The websites of both museums have pictures available using their search engines.
Tina's Logarithmic Spiral Slide Rule. The top picture shows the setting for the multiplier 8 in the sum 8 x 6. The lower picure shows the answer on the leftmost cursor. Read both the multipliers and the results on the linear scales on the cursors not on the spiral.
Calculator Downwind Toxic Vapor Hazard, Point Source, ABC-M2
K.Emil Troger, Mylaui.V., DRGM 227046.
Victor Fuel load Calculator for the Handley Page Victor B Mk.2 Supersonic Strategic Bomber
Weems and Plath Nautical Slide Rule 105
Young's Course Corrector. Designed by Walter Young, M.Inst. P.I.
Zambretti Weather Forecaster from Temeraire of Brixham.
NRK-2
RL
STM
