Many thanks, Bill, that is certainly a part of the answer. Sector rule 
it is!

Bill W.
Nottingham, PA

On 11/2/2014 11:16 AM, William Ghio wrote:
> On Nov 2, 2014, at 11:03 AM, Bill Webber  wrote:
>
>> Gentle Galoots and Rule Users,
>>
>> I have a very nice new-to-me rule that has scales I don't recognize and no
manufacturers name.  Any information would be greatly appreciated.  It is a
nicely made four fold rule, 36-inches overall.   These pics show the four faces:
>>
>> http://billwebber.
galootcentral.com/side%201.JPG
>> http://billwebber.
galootcentral.com/side%202.JPG
>> http://billwebber.
galootcentral.com/side%203.JPG
>> http://billwebber.
galootcentral.com/side%203.JPG
>>
>> At first glance I thought the scale on the inside (Side 3 and 4 above) was a
metric scale, but obviously it is not.  This inside scale is linear and contains
112 divisions in 35 1/2 inches.
>> The rule is marked "Hays Improved Practical Mechanics Rule'. Other linear
scales show on side 1, but printed at an angle.  Side 2 has architects scales
for 1/4 and 1/2.
>>
>> Additional details here;
>> http://billwebbe
r.galootcentral.com/detail%201.JPG
>> http://billwebbe
r.galootcentral.com/detail%202.JPG
>> http://billwebbe
r.galootcentral.com/detail%203.JPG
>> http://billwebbe
r.galootcentral.com/detail%204.JPG
>> http://billwebbe
r.galootcentral.com/detail%205.JPG
>>
>> Could this be a logo of some sort?
>> http://billwebber.galo
otcentral.com/logo.JPG
>>
>> If I can't get information on how to use it, I'll probably have to give it
away.  If I leave it laying around shop someone might pick it up and ask me how
to use it...
> Could it be a form of sector rule?
>
> See htt
p://web.mat.bham.ac.uk/C.J.Sangwin/Sliderules/sector.html
>
> Bill
>
>
>