Admin at 23:10, 22 October 2021

2021-10-22T23:10:29Z

New page

Some of the slide rules I have gathered over the years:

==Sun Hemmi P280==

Low cost two color simplex rule. Plastic body rule with unusual blue tinted slide and two color scales. Basic student rule with trig scales, the T, ST and S scales have complimentary angles marked in red, and the scales are all self-documenting on the right hand side. Reversible slide has 3 log log scales. Unbreakable plastic cursor.

[[File:Sun-hemmi-p280 front.jpg|400px|thumb|none|Sun Hemmi P280 (front)]]

[[File:Sun-hemmi-p280 back.jpg|400px|thumb|none|Sun Hemmi P280 (back)]]

Manual: [[File:Sun-Hemmi P280-P281.pdf]]

* body: plastic
* cursor: plastic
* length: 27cm
* Scales: 13
* Front scale: T, K, A, [ B, CI, C, ] D, L, S, ST
* Slide Reverse: [ LL1, LL2, LL3 ]
* country of origin: Japan
* year of manufacture: October 1972 [Date Code: WJ]

==Sun Hemmi Teledyne 44CA-600 Versalog II==

About June, 1973. The last Post Versalog II is made. The first Teledyne-Post Versalog II (new model number 44CA-600) appeared a little before then, in June 1972. For a long time, the last T-P Versalog we knew of had the date code WH (August 1972), but a recently acquired Versalog 44CA-600 example has surfaced with the date code XF, indicating June 1973 production.

[[File:Sun-hemmi-versalog-II front.jpg|400px|thumb|none|Sun Hemmi Versalog II (front)]]

[[File:Sun-hemmi-versalog-II back.jpg|400px|thumb|none|Sun Hemmi Versalog II (back)]]

* body: laminated bamboo
* cursor: metal/plastic
* length: 27cm
* Scales: 24
* Front: logX, LL/1, LL/2, LL/3 [ T/T, SecT/ST, Cos/S, C ] D, LL3, LL2, LL1
* Back Scale: LL/00, K, A, DF [ CF, CIF, CI, C ] D, R1, R2, LL0
* country of origin: Japan
* year of manufacture: August 1972 [Date Code: WH]

==Faber Castell 52/82==

Plastic body duplex rule with trademark green accent stripes on fundamental scales, and multi-line cursor. Rule face is self-documenting, with scale functions listed, as well as scale letters.

[[File:Faber-Castell-52-82 front.jpg|400px|thumb|none|Faber-Castell 52/82 (front)]]

[[File:Faber-Castell-52-82 back.jpg|400px|thumb|none|Faber-Castell 52/82 (back)]]

* body: plastic
* cursor: plastic
* length: 10" (25.4)cm
* Scales: 22
* Front scales: L K A [ B BI CI C ] D LL1 LL2 LL3
* Back scales: T T2 DF [ CF CIF S' C ] D S ST P
* Country of origin: Germany
* year of manufacture: August 1961 [Date Code: 861]

==Faber Castell 67/87==

Plastic body simplex 15cm rule with 4-line cursor, two color (red/black) scale markings, and inch side ruler, reversible slide has S, ST, and T scales. Rule is self documenting on right hand side for all scales.

[[File:Faber-castell-67-87 front.jpg|400px|thumb|none|Faber-Castell 67/87 (front)]]

[[File:Faber-Castell-67-87 back.jpg|400px|thumb|none|Faber-Castell 67/87 (back)]]

Catalog in which this slide rule appears: [[File:Faber-Castell 1970 Catalog.pdf]]

* body: plastic
* cursor: plastic
* length: 15cm
* Scales: 10 + ruler
* Front scales: K, A [ B, Ci, C ] D, L
* Back ruler scales: S, ST, T
* Country of origin: Germany
* year of manufacture: April 1959 [Date Code: 459]

==Pickett N1006-ES==

Pickett 5" Trigonometry Duplex Rule. This is the "Eye Saver" yellow version of this rule,

[[File:Pickett-n1006-es front.jpg|400px|thumb|none|Pickett N1006-ES (front)]]

[[File:Pickett-n1006-es back.jpg|400px|thumb|none|Pickett N1006-ES (back)]]

Catalog in which this sliderule appears: [[File:M138 Dieterich-Post Catalog 1968.pdf]]

* body: aluminium
* cursor: nylon/plastic with metal screws
* length: 5" (12.7cm)
* Scales: 17
* Front scales: K, A [B, ST, T, S, C] D, DI
* Back scales: Ln, DF [CF, CIF, CI, C] D, L
* country of origin: USA
* year of manufacture: 1959

==Pickett N600-ES==

Pickett 5" Trigonometry Duplex Rule. This is the "Eye Saver" yellow version of this rule,

[[File:Pickett-N600-es front.jpg|400px|thumb|none|Pickett N600-ES (front)]]

[[File:Pickett-N600-es back.jpg|400px|thumb|none|Pickett N600-ES (back)]]

Catalog in which this sliderule appears: [[File:M138 Dieterich-Post Catalog 1968.pdf]]

* body: aluminium
* cursor: nylon/plastic with metal screws
* length: 5" (12.7cm)
* Scales: 19
* Front scales: LL1, A [B, ST, T, S, C] D, DI, K
* Back scales: LL2, DF [CF, Ln, L, CI, C] D, LL3
* country of origin: USA
* year of manufacture: 1962-1964

==The Scales==

After seeing so many slide rules it may appear confusing to see so many scales close together one one slide rule. Here is a list of the most common slide rule scales.

{| style="background-color:#f9f9f9;" cellpadding="10" cellspacing="0" border="1"
|style="background-color:#f2f2f2;"|Letter(s)
|style="background-color:#f2f2f2;"|Description
|style="background-color:#f2f2f2;"|Applies to
|style="background-color:#f2f2f2;"|Colour
|style="background-color:#f2f2f2;"|Orientation
|style="background-color:#f2f2f2;"|Comments
|-
|C
|Single Logarithmic, 1 Decade (1-10)
|Multiplication, division
|style="color:black"|Black
|left to right
|Usually found on slide
|-
|D
|Single Logarithmic, 1 Decade (1-10)
|Multiplication, division
|style="color:black"|Black
|left to right
|Usually found on body
|-
|A
|Double Logarithmic, 2 Decades (1-10-100)
|Powers of 2 and Square Roots
|style="color:black"|Black
|left to right
|Usually found on body
|-
|B
|Double Logarithmic, 2 Decades (1-10-100)
|Powers of 2 and Square Roots
|style="color:black"|Black
|left to right
|Usually found on body
|-
|K
|Triple Logarithmic, 3 Decades (1-10-100-1000)
|Powers of three and Cube Roots
|style="color:black"|Black
|left to right
|
|-
|L
|linear scale (0-1)
|Mantissa for Common (base 10) Logs
|style="color:black"|Black
|left to right
|
|-
|S
|Sine scale
|Sines between 5.7° and 90°
|style="color:black"|Black
|left to right
|
|-
|S(cos)
|Cosine scale
|Cosines between 5.7° and 90°
|Red
|right to left, combined with S scale
|
|-
|T
|Tangent scale
|Tangents between 5.7° and 90°
|Black
|left to right
|
|-
|ST
|Single Decade 1-10, basic scale folded at 57.3
|Sines, Tangents between 0.6° and 5.7°
|style="color:black"|Black
|left to right
|
|-
|Ci
|Inverted Single Decade 1-10
|
|Red
|right to left
|
|-
|Di
|Inverted Single Decade 1-10
|
|Red
|right to left
|
|-
|Cf
|Folded Single Decade 1-10
|
|style="color:black"|Black
|left to right
|
|-
|Df
|Folded Single Decade 1-10
|
|style="color:black"|Black
|left to right
|
|-
|P
|Pythagorean Scale
|
|style="color:black"|Black
|left to right
|
|-
|LL1
|Log-Log scale 1
|Raising numbers to arbitrary powers
|style="color:black"|Black
|left to right
|
|-
|LL2
|Log-Log scale 2
|Raising numbers to arbitrary powers
|style="color:black"|Black
|left to right
|
|-
|LL3
|Log-Log scale 3
|Raising numbers to arbitrary powers
|style="color:black"|Black
|left to right
|
|-
|}

==Gauge Points==

Often used numbers such as Pi, e, conversions and other ratios can be found as Gauge Points on some scales. Here is a list of common gauge points.

{| style="background-color:#f9f9f9;" cellpadding="10" cellspacing="0" border="1"
|style="background-color:#f2f2f2;"|Symbol
|style="background-color:#f2f2f2;"|Value
|style="background-color:#f2f2f2;"|Name
|style="background-color:#f2f2f2;"|Applicable to
|style="background-color:#f2f2f2;"|Scales
|-
|g
|0.01745
|sin(1°)
|
|C,D
|-
|M
|0.31831
|1/π
|ratio of diameter to circumference
|A,B
|-
||
|0.78648
|π/4
|Area and Circumference of Circles
|C,B
|-
|//
|1.182°
|seconds in a radian, sin(1.1818)
|
|ST
|-
|C
|1.273
|4/π
|Volume of a cylinder
|C
|-
|/
|1.97°
|minutes in a radian, sin(1.97)
|
|ST
|-
|ℯ
|2.718281828
|Euler's Number
|Natural Logs, compound interest, half-life decay
|C
|-
|π
|3.141592654
|Pi
|ratio of circumference to diameter
|C
|-
|C1
|3.5683
|SQRT(40/π)
|volume of a cylinder
|
|-
|R
|57.299
|Reciprocal of Q
|1 radian = 57.3 degrees
|Ci
|-
|g′
|3437.74
|minutes in a radian
|Trig functions for small angles
|
|-
|g′′
|206264.8
|seconds in a radian
|Trig functions for small angles
|
|-
|}

Sliderules - Revision history

Admin at 23:10, 22 October 2021