| Name | Thumbnail | Links | Notes |
|---|---|---|---|
| Concise 270 |  |
Front Back |
|
| Dietzgen 1734 |  |
Front Back |
|
| Dietzgen 1767 |  |
Front Back is blank |
|
| Dravo |  |
Front Back |
|
| Engineering Insturments 10B |  |
Front Back Box Front Box Back |
Cheap but popular wooden student's rule. |
| Jeppesen CR-3 |  |
Front Back |
|
| Jeppesen MB-9 |  |
Front Back |
|
| K&E 4053 |  |
Front Back |
|
| Pickett NT-4 |  |
Front Back |
The engineering student's status symbol. |
| Pickett 101-C |  |
Front Back |
|
| Pickett 115 |  |
Front Back is blank |
Inexpensive plastic rule. |
| Pickett 110-ES |  |
Front Back Documentation |
Unusual scales include: V1 & V2 scales for vector calculations; 50-inch expanded C & D scales; G scale for stadia calculation. See documentation for details. |
| Pickett 300 |  |
Front Back |
Still carried & used daily. |
| Pickett N600-ES |  |
Front Back |
|
| Pickett N902-ES |  |
Front Back |
|
| Pickett N902-T |  |
Front Back |
|
| Post 1447 |  |
Front Back |
|
| Post 1452 |  |
Front Back |
|
| Science Spectrum |  |
Front Back Documentation |
Unusual Octal-Decimal rule used by computer scientists back when
octal (not hexidecimal) was the norm. See documentation link for operation
details. U.S Patent 3,654,437 |
| Sun Hemmi 259D |  |
Front Back Magnifier |
A present on my 16th birthday. Thanks, Dad! |
| Sun Mannheim |  |
Front Back Slider Removed Cursor1 Cursor2 |
Reportedly a Model 64 (Rietz) Unusual pointer on cursor for keeping track of decimal. Original owner was my wife's great uncle, a Stanford grad and chemical engineer. |