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Jr Engineer Construction Sets

Jr Engineer was a Meccano-like construction system. It was made in the USA, in around 1946.


Manufacturer / Distributor

Coledi Inc., New York 55, N.Y. USA


Info from the Metal Constructional Systems Database for JR ENGINEER

Maker
 
System Type
Meccano principle but sig. differences
Country
USA
Dates
known in 1946
Material
Aluminium (Alloy) / Steel
Thread
6-40
Boss Type
single-tapped
Boss Thread
6-40
Diametrical Pitch of Gears
21 (approximately)
No. of Parts in System
27
Hole Pitch (Spacing) (mm)
12.7
Diameter of holes in Strips(mm)
3.6
Diameter of the Bore in Bosses(mm)
3.6
Diameter of Axle Rods(mm)
3.2
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: cheese (slotted)
(see comment *1)
Material/Finish of Nuts and Bolts
Steel with a Steel finish
(see comment *2)
Size of the Nuts across Flats (mm)
7.7
Bolt diameter (mm)
5.5

Comments
2 phases with some different parts. 1st mostly aluminium; 2nd mostly steel. Painted Plates in both. *1Square Nut in manual. *2*3 Ph.2: Nut hex plain brass 6.4; Bolt hex with slot Nickel plated steel 6.6. mushroom head on longer Bolts.

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

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