Slide rule workshop AJ

Eric Rinehart history question

Pickett Pocket

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Reiss Artillery

While Pickett Pocket-size Rules are not especially rare or hard to identify, I haven't seen as much documentation about their development chronology as I have for Pickett full-size rules. Dr. Rodger Shepherd's familiar JOS article, and more recently, Thomas Croxton's expansion give a good picture of when features and design of Pickett full-size rules changed.

hook
Hooked stator posts
(N200-T and N1006-ES)

Questions:

  1. Do those features of the pocket rules coincide with those of the full-size rules?
  2. Did the pocket rules change from magnesium alloy to aluminum alloy at the same time as the full-size rules?
  3. Did the pocket rules change from metal cursor bars to plastic at the same time?
  4. →Can anyone give more information or a timeline about the ‘hooked’ stator posts on some pocket rules?