Robertson screw, was Panel hauler

[Jim]

Peter Lymburner Robertson (1879-1951) is a Canadian inventor of the 
square-drive screw, first produced in his Milton, Ontario factory in 1908. 
The Robertson factory is still operating today.
Robertson had licensed the screw in England but the party with which he was 
dealing intentionally put the company under and purchased the rights from 
the trustee thus circumventing Robertson. He spent a small fortune buying 
back the rights. After that he refused to ever allow anyone to make the 
screws under license. When Henry Ford tried out the Robertson screws he 
found they saved considerable time in the production of cars but when 
Robertson refused to license the screws to Ford, he realized that the use 
of the screws would not be guaranteed and stopped using them. This largely 
explains why they never became established in the United States.

Today Robertson screws are almost unknown in the United Kingdom, scarce in 
the United States, where they are used mainly in theatrical set 
construction and account for 10% of screws sold, while being very common in 
Canada where 85% of the screws sold use the Robertson head.

P. L. Robertson From Wikipedia, 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20070120/0ba0238a/attachment-0001.html