'Other' Construction and Allied Systems Downloads
Primus Engineering Construction Sets
Primus Engineering construction sets were made from both weed and metal. They were made in England from 1913-1926
Info from the Metal Constructional Systems Database
1913 (see comment *1) to circa 1926
Steel / Wood
1/8W (see comment *2)
97 (see comment *3)
4.1 (see comment *4)
Bolts: cheese (slotted)
Steel with a Copper finish
5.9(see comment *5)
*1 Or 14e. *2 Most, or 5BA? Some smaller. Later 5/32W. *3 Including Big Wheel parts. *4 Typical but up to 4.3. *5 For Bolts with slotted cheesehead look, but many others. Big Wheel N&B: 4x32 square nut and slotted mushroom head plain brass 6.4 7.6-7.9.
Below there are manuals/instructions which can be downloaded by clicking on the appropriate image.
© 2010-2019 Timothy Edwards