Author Topic: Beam Compass we called them Trammels  (Read 1031 times)

Offline sbwhart

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Beam Compass we called them Trammels
« on: November 22, 2017, 02:33:51 PM »
Over the week end I made a Beam Compass or as we use to call them Trammels but I thing Beam Compass is a better description as the man said it does was it says on the tin.

Your probably wondering why I needed one of these old fashion drawing/marking out instruments in the modern days of cad. The reason is quite simple I need to draw large arcs in order to model the valve gear on the loco I'm building and my little lap top was just too small to be able to see what was happening so it was a mater of good old pen a paper to the rescue.





Stew
A little bit of clearance never got in the road
 :wave:

Location:- Crewe Cheshire

Offline Spurry

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Re: Beam Compass we called them Trammels
« Reply #1 on: November 22, 2017, 03:41:07 PM »
Neat work. Like the hex to keep everything square.  :clap:
Pete

Offline John Rudd

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Re: Beam Compass we called them Trammels
« Reply #2 on: November 22, 2017, 05:10:01 PM »
Yup, very nice Stew.... :bow: your usual standard of workmanship...

Maybe an article for ME mag?
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Offline krv3000

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Re: Beam Compass we called them Trammels
« Reply #3 on: November 22, 2017, 06:01:09 PM »
a job well dun  :clap:

Offline sbwhart

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Re: Beam Compass we called them Trammels
« Reply #4 on: November 23, 2017, 01:53:02 AM »
Yup, very nice Stew.... :bow: your usual standard of workmanship...

Maybe an article for ME mag?

Hi John

Yes I'm going to send it to Model Engineering Workshop, I've a little bit of tidying up to do on the drawings and I'll post them her to be down loaded.

Stew
A little bit of clearance never got in the road
 :wave:

Location:- Crewe Cheshire

Offline sbwhart

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Re: Beam Compass we called them Trammels
« Reply #5 on: November 23, 2017, 02:26:15 AM »
Ok I've attached the drawing

Stew
A little bit of clearance never got in the road
 :wave:

Location:- Crewe Cheshire

Offline Will_D

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Re: Beam Compass we called them Trammels
« Reply #6 on: November 23, 2017, 05:29:26 AM »
Very nice work.

How did you make the hex holes?
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Offline sbwhart

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Re: Beam Compass we called them Trammels
« Reply #7 on: November 23, 2017, 07:19:17 AM »
Thanks for the interest Will

They are not hex they are just 9mm holes for the 8mm (5/16") hex to pass through the locking rings pull down on the flat and keeps everything square and aligned.

Cheers
Stew
A little bit of clearance never got in the road
 :wave:

Location:- Crewe Cheshire