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Master Builder Construction Sets

Master Builder was a Meccano-like construction system. It was made in the USA from around 1915 to the mid 1920s

Manufacturer / Distributor

The Master Builder, 468 Broadway, New York, USA

Info from the Metal Constructional Systems Database for MASTER BUILDER (Ref:M B1)

Maker
 
System Type
Meccano principle but sig. differences
Country
USA
Dates
circa 1915 to 1924 (some significant doubt)
Material
Steel
Thread
8-32 (see comment *1)
Boss Type
 
Boss Thread
 
Diametrical Pitch of Gears
32 (see comment *2)
No. of Parts in System
57
Hole Pitch (Spacing) (mm)
12.7
Diameter of holes in Strips(mm)
4.2 (see comment *3)
Diameter of the Bore in Bosses(mm)
 
Diameter of Axle Rods(mm)
4.0
Types of Nuts and Bolts
Nuts: square
Bolts: round (slotted)
(see comment *4)
Material/Finish of Nuts and Bolts
Steel with a Nickel plated finish
Size of the Nuts across Flats (mm)
8.8
Bolt diameter (mm)
7.6(see comment *5)

Comments
Pts including 3 Formed Strip(s), curvy Triang Plate(s), 5x4,11 holes Flanged Plate(s), 8 holes Flanged Sector Plate(s) with 2x45° slots, 4" Tube, 3" Wheel. *1Trademark used from 7/14. *2and maybe 5/32x30. *3from Pinion. *44.1,4.3 in some parts. *5hex Nuts shown too. *6 and maybe 7.3.

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A Master Builder manual.

Page content last updated - 28th June 2019