Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2

Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2

Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2
BLUNDELL OMEGA SLIDE RULE ARTILLERY 10 MILS MK 2. A CLOSED FRAME SLIDE RULE MADE OF PLASTIC WITH TWO PLASTIC CURSORS (REPLACEMENTS). SCALES ARE A{B, C}D//{S, ST, T}. THE TRIG SCALES ARE IN MILS (6400 MILS = 360 DEGREES). THERE IS A METRES AT 1/50,000 RULE ON THE UPPER EDGE EXTENSION AND THERE ARE INSTRUCTIONS AND FORMULAE ON THE BACK. GREEN CLOTH COVERED CARD CASE. THIS IS AN ARTILLERY SLIDE RULE FROM 1970. IT IS UNOPENED AND IN ITS ORIGINAL PACKAGING.

THE LABEL ON THE FRONT STATES. M'FTD BY BLUNDELL HARLING.

ONE SLIDE RULE, PREVIOUSLY, WAS UNPACKED TO TAKE THE PHOTOGRAPHS AND SHOW THE PACKAGING. THIS SLIDE RULE HASN'T BEEN UNWRAPPED. ONE END OF THE PLASTIC PACKAGING IS STILL SEALED. SEE PHOTOGRAPHS FOR DETAILS - THE FIRST 4 PHOTOGRAPHS ARE OF THIS SLIDE RULE AND ITS PACKAGING. BLUNDELL RULES LTD, ALSO KNOWN AS BRL AND LATER BLUNDELL-HARLING, IS A BRITISH COMPANY ESTABLISHED AS A FELT-MAKER IN LUTON IN 1852.

THEIR SLIDE RULES WERE GENERALLY PRODUCED IN PLASTIC (BEGINNING WITH BAKELITE BUT LATER USING THE GERMAN PLASTIC ASTROLON) AND USED ACRYLIC FOR THEIR CURSORS. MUCH OF THEIR PRODUCT RANGE WAS MANUFACTURED FOR THE BRITISH GOVERNMENT, FOR WHOM THEY ALSO PRODUCED ARTILLERY RULES, THE PILOT BALLOON RULE, A RADIAC CALCULATOR AS WELL AS THE BASIC SLIDE RULE. IN 1956 THEY MOVED FROM LUTON TO WEYMOUTH AND THEN IN 1964 THEY ACQUIRED THE ASSETS OF W. HARLING, WHO PRODUCED DRAWING OFFICE AND NAVIGATIONAL EQUIPMENT, BECOMING BLUNDELL-HARLING.

THEY PRODUCED INEXPENSIVE SLIDE RULES UNDER THE ACADEMY BRAND AS WELL AS MAKING RULES FOR W. AS THE MARKET FOR SLIDE RULES DECLINED IN THE 1970S BLUNDELL-HARLING BEGAN MAKING A VARIETY OF SPECIAL PURPOSE AND PROMOTIONAL SLIDE RULES AS WELL AS SLIDING CHARTS AND CONVERSION TABLES INCLUDING THEIR METRIVERTER SERIES OF IMPERIAL UNITS TO METRIC UNITS CONVERTERS. THEY STILL MAKE A SPEED, TIME AND DISTANCE CONVERSION RULE FOR NATO AND CONTINUE TO PRODUCE SPECIAL PURPOSE AND PROMOTIONAL RULES.

PROVENANCE: THIS ITEM IS PART OF THE PERSONAL COLLECTION OF THE LATE ASSOCIATE PROFESSOR ALLAN G. BROMLEY, OF THE UNIVERSITY OF SYDNEY. HE WAS REGARDED AS THE WORLD AUTHORITY ON CHARLES BABBAGE'S CALCULATING ENGINES INSTIGATING THE BUILDING OF THE DIFFERENCE ENGINE NO. 2 AT THE SCIENCE MUSEUM LONDON AND THE ANTIKYTHERA MECHANISM AND HAD EXTENSIVE KNOWLEDGE OF CALCULATORS, ANALOGUE COMPUTERS, LOGIC, STEREOPSIS, TOTALISATORS, CLOCKS AND TIME KEEPING AND MECHANICAL ENGINEERING. THE PHOTOGRAPHS FORM PART OF THE DESCRIPTION.

PROVENANCE: THIS ITEM IS PART OF THE PERSONAL COLLECTION OF THE LATE DR ALLAN G. FOR DOMESTIC CUSTOMERS, ALL OUR PARCELS/ITEM WILL BE POSTED BY REGULAR POST UNLESS OTHERWISE REQUESTED AND THERE WILL BE AN ADDITIONAL CHARGE. The item "RARE BLUNDELL OMEGA SLIDE RULE ARTILLERY 10 MILS MK 2" is in sale since Sunday, March 29, 2020. This item is in the category "Collectables\Science, Medical\Science".

The seller is "bromleybooks" and is located in Sydney, NSW. This item can be shipped worldwide.


Rare Blundell Omega Slide Rule Artillery 10 Mils Mk 2


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