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Australia/NZ

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ARCUS - Max Wurker Pty Ltd

REF ARCUS Brand Slide Rule

ARCUS Brand Slide Rule Made in Australia for Max Wurker Pty Ltd, Similar construction to "Electro" model produced by Service Slide Rules. Front Scale (Extended) LL3, A(KW) [ B(PS), CI, C ] LL2 Back Scale [ S, L, T ] Back: Equivalents, Formulae and Trig identities Scan provided by Cyril Catt. Australia

C.O. Browne, Melbourne, Australia

REF C.O. Browne Cylindrical "Long Scale Rule"

C.O. Browne Cylindrical "Long Scale Rule" Made in Australia by C.O. Browne. , No. F.C.46 Diameter 3", length 13" closed, 18" maximum Similar construction to Fuller Cylindrical Slide Rules. The single helical scale is marked on a cylinder about 2-3/4" in diameter and 4-1/2" long. The scale makes 50 turns around the cylinder, for a total length of 413" (34 feet, or 10.5 metres). It is marked to 4 significant figures at the top end, and can be read to 1 part in 20000. The inner core of the rule is covered with tables of constants, formulae, and conversion factor Scan provided by John Wolff. Australia

CAL Slide Rules

S411 CAL Slide Rule No. 2

CAL Slide Rule No. 2 Assumed to be Made in Australia - Patent pending 7415/42 Note: CAL is also the initials for Australia's Copyright Agency Ltd. Similar construction to British Unique's but with a different wood Front Scale (Extended) LU, S, A [ B, R(CI), C ] D, T, LL Back: Equivalents, Formulae and Trig identities

Ben Jordan

REF Ben Jordan's Scale Of Proportions Slide Rule

Ben Jordan's Scale Of Proportions Slide Rule For finding the dimensions of an engraving to be made smaller or larger than copy Made in Australia Front Scale: For Reductions: Copy ( Engraving) For Enlargemnets: Engraving ( Copy ) Scan provided by Cyril Catt. Australia Note: This was from an engraver near Sydney, New South Wales. It was made from the metal sheets used for engraving, and appear to be produced as advertising material, probably in the 1950s.

Griffin Computors, Sydney

REF Griffin 121 Simplified Slide Rule

Griffin 121 Simplified Slide Rule Made in Australia by Griffin Computors Front Scale (Extended) Units, C ( D ) Back: Blank Note: This was found in an Las Angeles bookshop run by an Australian. Scan provided by Cyril Catt. Australia Sleeve

MICADOR

Micador No. 7 Pocket Darmstad REF	Micador No. 7 Pocket Darmstad Made in Japan (Most Likely) Front Scale 15cm // LL3, LL2, A [ B, CI, C ] D, LL1 Back Scales: Unknown Archive - Scan by Darren Samphier Collection, UK
Micador 10
Micador 35
Micador 50
Micador 60 REF	Micador 60 Made in Germany - Same as Aristo 0903 Scholar Front Scale L, K, A [ B, CI, C ] D, S Cos, ST ST, T Cot Back Scales: 25cm [ ] 8-0,0-8 in Multiple hairlines Archive - Scan by Rod Lovette Collection, UK
Micador 530 Slide Rule REF	Micador 530 Slide Rule Possibly Made in Germany by Dennert & Pape (Aristo) Front Scale (Extended) LL01, LL02, LL03, A [ B, L, K, C ] D, LL3, LL2, LL1 Back: T Cot, ST ST, DF [ CF, CIF, CI, C ] D, P, S Cos Scan provided by Steve Seale Collection, Nashville, Tennessee
Micador Pocket Slide Rule ISRM 20.04.01.132	Micador Slide Rule Made in Japan Front Scale: 13cm// A [ B, CI, C ] D, K \\ 5in Back scale: [ S, L, T ] Gift Of Philip Stanley Collection
Micador Generic Pocket Slide Rule REF Instructions (1.46MB PDF	Micador Generic Pocket Slide Rule Made in Japan by Santok Front Scale: A [ B, CI, C ] D, K Back: Blank Archive - Ebay photo January, 2014

Industrial Models, Wellington, New Zealand

Industrial Models Dimension Dial ISRM 14.07.22.08

Industrial Models Dimension Dial For finding the proportion of a reproduction larger or smaller than copy Made in Wellington, New Zealand Front Scale: Pica, Inch ( Copy) Back: Instructions Gift of Phillip Rodley, Upper Hutt, New Zealand

Service Slide Rule - Sydney, Australia, 1954-1987

Service Slide Rule - Electro REF S440

Service Slide Rule - Electro Made by Service Slide Rule, Sydney, Australia Front Scale (Extended) LL3,  A(KW) [ B(PS), CI, C ] LL2 Back Scale [ S, L, T ] Back: Equivalents, Formulae and Trig identities Original Owner: N. Fogarty/N.S.W. Australia

Service Slide Rule - Reed (for Electrical Engineers) REF Designed by Joseph Grifith Reed, M.I.E., Aust. Chartered Engineer in 1935 See J.G. Reed's entry in Slide Rule Who's Who Gallery. REED Instructions (4.37MB PDF) Read this paper by David G. Rance: REED Riddle Solved (976KB pdf).

Service Slide Rule - Reed (for Electrical Engineers) Made by Service Slide Rule, Sydney, Australia. Front Scale (Extended) inch // K, A [ B, CI, C ] D, L || cm Back Scale [ S, S&T, T ] Back: Equivalents, Formulae and Trig identities Well: D/L scale (Diameter to Length) scale better known as Nagaoka's coefficient. Note: The scale is more commonly known as Nagaoka's coefficient after its originator, the Japanese physicist Hantaro Nagaoka (1865-1950). Communication engineers often need to calculate the inductance of electrical windings, e.g. a solenoid of a certain length, a certain diameter and a number of windings. This previously unheard of 'Diameter to Length' (0 being the infinite length) logarithmic D/L coefficient scale is a masterly Reed innovation for reading off the Nagaoka factor. 'K' in the inductance formula in Microhenries - where d = the diameter in centimetres, b = the length in centimetres and n = the total number of turns. Without including the K factor there is a serious error due to magnetic non-uniformity when the coil is short and its length is comparable to its width. This was, for example, frequently the case in coils for the valve radio industry. (per David G. Rance). Scans by David G. Rance Collection, The Netherlands

Service Studios

Service Studio Slide Rule R.A. REF

Service Studio Slide Rule R.A. Made by Service Studio Slide Rule, - 1943 Front Scale (Extended) A [ B, C ] D Back Scale [ S, L, T ] Back: Equivalents, Trig identities, Range Formulae Scan provided by John Oakhill, Australia

Slide Charts of Australia, Sydney

SCA Circular Slide Rule REF

SCA Circular Slide Rule (1973) Made in Australia by Slide Charts of Australia Front Scale (Extended) CI, C ( D, A, K, L) Back Scale Orginal Area (Conversion Factor, Converted Area) Scan provided by Cyril Catt. Australia

Unnamed Australian Slide Rule

Unnamed Australian (Homemade?) Slide Rule REF

Unnamed Australian (Homemade?) Slide Rule Made in Australia - Manufacturer Unkown Front Scale (Extended) K, A [ B, CI, C ] D, L Back: Blank Note: Wood construction with paper scales (like Lawrence slide rules) Scan provided by Cyril Catt. Australia

W&G 421 REF	W&G 421 Closed Made in Melbourne, Australia - W&G Record Processing Co. Front Scale (Extended) 10in // L, A [ B, Reciprocal, C ] D, Cube || 25cm Back scale: [ Sin, Sin & Tan, Tan ] Archive - University of Melbourne, School of Physics Museum
W&G 432 "Dual-Face" Comprehensive ISRM 14.07.22.01	W&G 432 "Dual-Face" Comprehensive Made in Melbourne, Australia - W&G Record Processing Co. Front Scale LL (or LL3), L, A [ B, Reciprocal (or CI), C ] D, Cu, LL (or LL2) Back Scale SINE1, SINE2, KW [ HP, TANGENT1, TANGENT2, F ] Voltage Drop, Dynamo Efficiency Unique thumb wheel for sliding cursor. Gift of Phillip Rodley of UpperHutt, New Zealand.
S356 W&G 432 "Dual-Face" Comprehensive REF S356	W&G 432 "Dual-Face" Comprehensive Made in Melbourne, Australia - W&G Record Processing Company Front Scale LL (or LL3), L, A [ B, Reciprocal (or CI), C ] D, Cu, LL (or LL2) Back Scale SINE1, SINE2, KW [ HP, TANGENT1, TANGENT2, F ] Voltage Drop, Dynamo Efficiency Conventional Cursor. The stock has the same dimension as most Hemmi duplex slide rules, including the Post Versalog, so this may be a Hemmi cursor
ISRM W&G 443 Artillery Slide Rule, VFA 3400 Mk1 ISRM 06.02.07.01 W&G 443 Instructions 6Mb	W&G 443 Artillery Slide Rule, VFA 3400 Mk1 1945 Made in Melbourne, Australia - W&G Record Processing Co. Front Scale (extended) L, A [ B, Reciprocal (or CI), C ] D, Cu Back Scale (extended) SINE1 0°-90° & 0-1.000 [ ANGLE2 5.8°-90° @ 174°-90° , ANGLE1 0°34'-5°30' ] RANGE 1-10, TAN 0-45° & 0-1.00 Conventional Cursor Donated by Stephen Sheen in memory of his father. This instrument belonged to the late WX1844 Gunner George Sheen (portrait from 1966) of the 2/3rd Australian Field Regiment (6th Division, 2nd AIF) during WWII. He obtained this at the end of the war. A Christmas menu of 1941 is signed by members of his battery. The emblem is for an officer of the Royal Regiment of Australian Artillery (RAA) and shows the The (British) Lion and (Australian) Kangaroo representing "imperial solidarity".
W&G 454 "Dual-Face" Survey REF	W&G 454 "Dual-Face" Survey Made in Melbourne, Australia - W&G Record Processing Co. Front Scale Sine, Cos [ Angle 2, Angle 1 ] Range, Tan, Cot Back Scale L, A [ B, Reciprocal, C ] D, Cu Archive - Greg Scott Collection Instructions 1.05Mb
W&G 465 "Dual-Face" Shipping Freight & General Purpose Slide Rule REF	W&G 465 "Dual-Face" Shipping Freight & General Purpose Slide Rule Made in Melbourne, Australia - W&G Record Processing Co. Front Scale L, A [ B, Reciprocal, CI, C ] D, Cu, K Back Scales Pounds-Shillings, Shillings-Pence, T/R, P, D2, D3/D1, CC Archive - Not in Collection
W&G 476 "Dual-Face" Trigonometrical (Stadia) ISRM 21.11.01.01 This slide rule was well-traveled. This specimen was obtained out of Illinois in October, 2021.	W&G 476 "Dual-Face" Trigonometrical (Stadia) Made in Melbourne, Australia - W & G Record Processing Co. Front Scale: LL (or LL3), L, A [ B, Reciprocal (or CI), C ] D, Cu, LL (or LL2) Back Scale: Stadia V, H, Chord, A [ B, SIN<6 COS>5, SIN>5 COS <6, C ] D, TAN 30-6, COT 84-90, TAN 5-45, COT 85-45 Original Owner: E.A. Bramhall (Marked on slide and sleeve). The ISRM curator researched the provenance of this slide rule that was owned by Eugene (Gene) Andrew Bramhall. (B. 1922 New York D. 1995 Louisiana) Used it at Univ of London after being discharged as a Private in the U.S. Army where he was stationed in England during World War II. He was in the 455 battalion of General Patton's Third Army in Europe. He met his wife Margaret Cecily Wilson (age 18) at a dance while in England. Maggie's records shows that she flew alone (age 19) by air on Pan American Airways) to New York on August 4, 1946. They were married in Flushing, Long Island, New York,, Note: Hailey Bramhall, granddaughter of Maggie, located the paperwork her grandmother completed on the New York passenger Lists, Gene and Maggie's daughter Teresa "Terri" Cecily Oberholtzer,(1951-2021) who was born in Teaneck, NJ, related that her early life was spent travelling the world with her three sisters, mother and father who worked as a road (civil) engineer. They lived in England, Africa, Bahamas and all over the United States.
Looking for Examples of:	W&G MkII Pilot Ballon Slide Rule (1928-1943+)
W&G Aerial Dead Reckoning Computer R.A.A.F. Mk 1 REF	W&G Aerial Dead Reckoning Computer R.A.A.F. Mk 1 Made in Australia by White & Gillespie Front Scale: Distance Naut Miles, True Air Speed (Time Min, Hrs, Density Altitude, Air Temp ) Back Scale: Wind Correction Angle( True Heading ) Scan provided by Cyril Catt. Australia
W&G Slide Rule Fv REF	W&G Slide Rule Fv Made in Australia by by White & Gillespie Front Scale Elevation, ho [ Frequency ] Ohms Back Scale Nomagraph: Km, h', degrees Scan provided by Cyril Catt. Australia
W&G Proportion Calculator REF	W&G Proportion Calculator Made in Melbourne, Australia - W&G Record Processing Co. Front Scale Depth [ Width ] Archive - not in collection

Winstone, Blackburn, Smith. Christchurch, New Zealand

Winstone Concrete Block/Volume Calculator ISRM 14.07.22.10

Winstone Concrete Block Calculator For finding the proportion of a reproduction larger or smaller than copy Slide Chart Made in Christchurch, New Zealand Front Scale (Block): No. 16in blocks, Total Length [No. 8in courses, Height of Wall, Blocks Reqd. ] Back Scale(Volume): A Thickness [ B, C ] D Cubic Yards. Gift of Phillip Rodley, Upper Hutt, New Zealand

G. M. YABSLEY, Murwillumbah

Yabsley Acreage Calculator REF

Yabsley Acreage Calculator (1972) Made in Australia - Designed and made by G.M. Yablsey Front Scale (Extended) $ balance per Claim ($ per cwt) 2 Ccwt/acre, 4 cwt/acre Back: Instructions Note: This was made by G.M. Yabsley, an agronomist colleague, of Cyril Catt in the NSW Dept. of Agriculture, to ease the burden of checking a few hundred applications for a former Government fertilizer subsidy. Scan provided by Cyril Catt. Australia

Early White & Gillespie Product List