'Other' Constructional and Allied Systems Info & Downloads

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Big-Joy Construction Sets

Big-Joy was a Trix-like construction system. It was made in Australia in the early 1930s

Manufacturer / Distributor

A.M.K. Manufacturing Co., Melbourne, Australia

Info from the Metal Constructional Systems Database for BIG-JOY

System Type
as TRIX (inc MCX)
known in 1933
Boss Type
no boss
Boss Thread
Diametrical Pitch of Gears
No. of Parts in System
Hole Pitch (Spacing) (mm)
7.8 (some significant doubt)
Diameter of holes in Strips(mm)
3.6 (some significant doubt)
Diameter of the Bore in Bosses(mm)
Diameter of Axle Rods(mm)
--- (Screwed Rods or Bolts are used as axles.)
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: tapered cheese (slotted)
Material/Finish of Nuts and Bolts
Size of the Nuts across Flats (mm)
Bolt diameter (mm)

Generally TRIX-like but nickel or chrome parts, & poor quality. Pulley Disc has no holes & a Rubber Ring fits a made-up pulley. Card Windmill Blade.

The MCS document for this system is shown below. It 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.