Tina's British Slide Rules

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Electronics

Abbot Brown Tank Capacity Slide Rule made for William Neill and Son Ltd, St. Helens. Abbot Brown is from Beaminster, Dorset, Makers of Engraved and Printed Scales including Slide Rules and Rulers.

Alan Menmuir Tank Capacity Calculator, made for the Globe Tank & Foundry (Wolverhampton) Ltd.

Austin Weight Calculator. Double Sharp Weight Calculator, Model A.

Arel GW Photo Slide Rule. This rule is probably American but I can't prove it so it is staying on this page for now.

Brinell Hardness Slide Rule, designed by S.A.Main, B.Sc for Hadfield's Ltd, Hecla and East Hecla Works, Sheffield, England.

The Technical Standard Slide Rule a product of The British Slide Rule Company, proprietors, Marine and Overseas Services Ltd, 16 Barter Street, Holborn, London, WC1

The Supreme Slide Rule a product of The British Slide Rule Company

Alcohol Proof Rule delivered with Buss Sykes Hydrometer

Buss 33 Hatton Garden, London, Ullaging Slide Rule with two slides and five piece 48" Ullaging rod the sections of which screw together. The Ullaging rod is used to find the depth of fliud (usually alcoholic beverages) in barrels. Ullage is the empty (air-filled) space above the fluid level in the barrel.

Classic Series 1.

Classic Series 1

Classic Series 2

Classic Series 2

Classic Series 3

Classic Log Log

Clementson Pipe Sizing Slide Rule.

Tina's Quarter Square Slide Rule. This is a homemade Non-Logarithmic Slide Rule based on the Equation :- xy = ((x+y)^2)/4-((x-y)^2)/4. If you have a set of tables or in this case a slide rule from which the Quarter Squares (w^2/4) of numbers can be found, Multiplication can be achieved solely using Addition and Subtraction. I designed this Slide Rule to Demonstrate this Concept.

Coggeshall Slide Rule F.B.Cox Maker Warranted Best Box Established 1780 with Scales A[B,C]D a Girt Line and an 8 Square Line (also known as a Mast Maker's Scale) used to set out an Octagon on a Square Timber.. 24" 2-Fold rule with 1/8" Sub-Divisions and 1/4", 3/8", 1/2", 5.8", 3/4" and 1" Scales

John Davis and Son Derby Ltd, Made in England Slide Rule with scales 10ins//A[B,CI,C]D||27cm, [S,L,T]. This rule is very similar in terms of construction method, dimensions and scales to my Stanley Rules which you can see below. This rule has a mode of construction which is different to my other Davis rules leading me to believe that this rule was made by Stanley for Davis.

John Davis and Son Derby Ltd, Made in England Slide Rule. This rule fits the description of the Davis Autocrat in the pamphlet, John Davis & Son (Derby) Ltd. A Chronology of Slide Rule Production by Colin Barnes. This has scales 10ins//A[B,C]D||27cm (extending to 56cm in the well), [S,L,T] with Gunner's gauge marks.

John Davis and Son Derby Ltd, British Made, Autocrat. This has the same scale set as the rule above except that it has a 26cm Rule on the side and no extended Centimetre Rule in the Well.

John Davis and Son Derby Ltd, British Made, Labelled as an Autocrat but with a Daffield scale set.

John Davis and Son Derby Ltd, British Made, Plutocrat.

John Davis and Son Derby Ltd, British Made, Murgatroyd's Percentage Calculator, signed by Peter Murgatroyd.

Dubilier Capacity Slide Rule designed by Philip R.Coursey. This rule is identical in construction to the Murgatroyd rule above; for this reason I have placed it with mu other John Davis slide rules even though the name John Davis does not appear on the rule.

Aristocrat. The Aristocrat was made by Davis and Son but this one has no maker's name.

Sivad Mannheim. Sivad is Davis backwards and Davis themselves have used Sivad as a brand name on some of their other products. This rule may be an example of the Davis Student as described in the pamphlet, John Davis & Son (Derby) Ltd. A Chronology of Slide Rule Production by Colin Barnes. A rule labelled John Davis & Son, Derby, Ltd, Patent 101051, 1918, Rule Slide, 10 Inches Mark 1 was recently sold on EBay, The Sivad rule seems to be a more recent version of this rule. The differences are that the Mark I has S,L,T scales on the back of the slide, has Gunner's Gauge Marks, two cursors and the celluloid is held in place with screws instead of pins. I think this confirms that Sivad is a Davis Brand Name.

De Havilland Aircraft Company DH 104 Dove Loading Slide Rule

Dring and Fage 44" Customs and Excise Slide Rule DF43 G6 and Dring and Fage 50" Cask Ullaging Rod DF73 C9.

Farmar's Rule, The Standard Slide Rule for the Entire Wine and Spirit Trade (Pocket Size)

Farmar's Rule, The Standard Slide Rule for the Entire Wine and Spirit Trade (Desk Size)

Farmar's Rule, The Standard Slide Rule for the Entire Wine and Spirit Trade (Desk Size)

Farmar's Profit Calculating Rule, a Business Slide Rule for Pricing, Buying and Selling.

Farmar's Profit Calculating Rule, a Business Slide Rule for Pricing, Buying and Selling. This is a simplified version of the rule shown above.

Froude Displacement Slide Rule made by Stanley, with two slides, one on each face

Heath & Co. Hezzanith Navigation Slide Rule. This rule is very similar to the Thornton PIC 3654 which you can see on the Thornton page. The differences are the navigation tables on the back and in the well of the Hezzanith and the inclusion of a reciprocal scale in the centre of the slide on the 3654. The 3654 also has a better quality steel and glass cursor.

Heath & C0. Hezzanith Carmody Slide Rule

Helix A50 LL. This rule is definitely not British, it is marked foreign, most of the evidence suggests that it is Japanese but it also shares similarities with some German rules so for now it can stay here. It is identical to the Regal A50LL suggesting that rule is not British either.

Helix Top Precision No.A102S. This rule is definitely not British, it is marked foreign, most of the evidence suggests that it is Japanese but it also shares similarities with some German rules so for now it can stay here.

Cardboard Slide Rule delivered with Chas. Hoare's Slide Rule Manual

Cardboard Slide Rule delivered with the 1868 Edition of Chas. Hoare's Slide Rule Manual

H.S and Company, Two Foot, Four Fold Boxwood Carpenter's Rule. On one face there is a 2 foot scale delineated in Inches, on one edge is a 2 foot scale delineated in 1/100ths of a foot. On the other side, one fold is occupied by a load table from 12 to 24 pence per cubic foot with prices in pounds, shillings and pence for a 50 Cubic feet full load; the adjacent fold has a two decade logarithmic scale and similarly delineated brass slide for calculation with an adjacent Girt Line running from 4 to 40 for calculating the volume of Timber in the Round. The remaining two folds are occupied by scales labelled 1/4, 3/8, 1/2, 5/8, 3/4, Inch, 1 1/4 and 1 1/2.

MAR Capacity Calculator for Circular and Rectangular Tanks

Lawes Rabjohns Ltd, Miles Druce and Co. Ltd. Weight Calculator for Iron and Steel Bars, Sections, Joists, Plates and Sheets

J.A.Nicholl and Company, London, 1916, Mark VI Slide Rule for the Observation of Fire Apparatus used by an Artillery observer to direct fire

Norton and Gregory, System Rietz. D.R.Patent No. 173660. Based on the patent number this was probably made by Nestler.

Rabone and Sons Limited Two-Fold 24" Rule with Brass Slide made to Slater's pattern for the textile industry. This rule is most similar to Rabone's No.2433 in the 1878 Price List.

Rabone and Sons Limited, Two Fold 24", Coggeshall Style. This rule is most similar to Rabone's No.2418 in the 1878 Price List. The labels Buck & Hickman Ltd. London and G.M.T.S are also stamped into the surface of this rule.

Regal A102S, an identical slide rule appeared on EBay recently described as being produced by Regal Harcote Limited.

Regal A50LL.

Regal F106.

Reliance Slide Rule.

F. Robson, Newcastle on Tyne, This has Scales on both Faces, with A, B and Girt Line Scales on one Face and Inverted Line (Reciprocal) B and A Scales on the other Face. The two edges have 24 Inch Scales. One of the Brass Straps is Engraved with the words Permanent Way Department Wearmouth.

Short & Mason Atmospheric Humidity with scales Based on Marvin's Tables (USA) Sling/Assmann and on British Met.Office Tables. Stevenson Screen.

Simplon Bi-Lateral S.B.5

Simplon S.P.5

Simplon Slide Rule S.R.10 Bi-Lateral (Reitz System) Patent No. 413308

Simplon Electro

Simplon Slide Rule X.L.10 Bi-Lateral (Log-Log) Patent No. 413308

Simplon Major (Log-Log) Slide Rule Patent No. 413308

Simplon Primary (Log-Log) Slide Rule (patent No. 413308) Made in England by Dargue Brothers Ltd. New Simplon Works, South Parade, Halifax, England

Simplon Bi-Lateral Log Log

Simplon Service WR2-A, Patent No. 413308.

Stanley Slide Rule with scales 10in//A[B,C]D||26cm, [S,L,T]

Stanley Slide Rule with scales 10in//A[B,C]D||27cm, [S,L,T]

The Stanton Ironworks Company Limited, Near Nottingham, England, Water Flow Calculator. Made by P.J.S.

The M.T.Slide Rule, J.H.Steward Ltd. 406 Strand London. For Calculating the Speed of Columns of Vehicles.

Taskmaster Linear Slide Rule, made in Leicester. Useful for demonstrating the mode of use of a slide rule to small children.

Techniculture Calculator. Not a Slide Rule but interesting nevertheless.

Thomas Hart, The Lambeth Cotton Rope Horse Power Calculator.

Thomlinson's Equivalent Paper Slide Scale, J.Thomlinson Ltd. Publishers, Partick, Glasgow.

Tie Clip in the shape of a Slide Rule with moveable slide and cursor.

Classroom Demonstration Slide Rule 5 Feet 6 Inches Long, Unknown Maker but could be Tiger Toys.

Unknown Slide Rule purchased in Britain but with design details which suggest it may be an early Nestler of German origin.

Vickers Machine Gun Slide Rule

Wheaton, Exeter Slide Rule with scales 26cm//A[B,C]D||10in, [S,L,T] L, un-labelled

Wills Brothers Company, Routledge, Bolton Engineer's Rule

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