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Tri-Sector

Tri-Sector was a simple construction system, using left and right hand triangular flanged triangular plates. It was made in the UK in circa 1921.

Manufacturer / Distributor

The Hobran Engineering Co. Ltd., Shelsley Works, Wolverhampton, UK

Info from the Metal Constructional Systems Database for TRI-SECTOR (Ref:T-R)

Maker
 
System Type
Non-Meccano type
Country
United Kingdom
Dates
1921
Material
Steel
Thread
 
Boss Type
 
Boss Thread
 
Diametrical Pitch of Gears
--
No. of Parts in System
10 (some significant doubt)
Hole Pitch (Spacing) (mm)
31.8 (see comment *1)
Diameter of holes in Strips(mm)
4.7 (see comment *2)
Diameter of the Bore in Bosses(mm)
 
Diameter of Axle Rods(mm)
 
Types of Nuts and Bolts
Nuts:
Bolts:
Material/Finish of Nuts and Bolts
 
Size of the Nuts across Flats (mm)
` 
Bolt diameter (mm)
 

Comments
The only structural parts are right hand & left hand Flanged Triangles, 2½x3¾". Known from 1921 ads. May have been short lived. *1 1¼". *2 In the Flanged Triangles.

The MCS document for this system is shown below. It can also be downloaded to your computer if desired here

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Pages from the 'Other Systems Newsletter' which contain information on this system are shown below. They can also be downloaded to your computer if desired here

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The report can be zoomed into, made full screen or downloaded as a pdf document by using the controls provided

There are currently no manuals, leaflets or photos etc. available for downloading. If you can supply any, please get in contact with me.

Page content last updated - 26th March 2021