Historical information
Continuous cutting chain was patented in 1905 by Samuel Bens of San Francisco, while the first portable chainsaw was developed and patented in 1918 by Canadian millwright James Shand.
But the main advancements of modern petrol chainsaws occurred in Europe in the 1920s and 30s where Andreas Stihl is often hailed as the "father of the chainsaw"
After the second world war lighter materials, metal alloys and improved engine designs revolutionised the logging and timber industry.
This Wright Reciprocating Saw was made in Sheboygan, Wisconsin, between 1960 and 1962. Its a Rare GS-5020A model.
It has a 7.06 cu. in. (115.7 cc), two-stroke motor, which weighed 25 lbs. (11.3 kg) complete.
The blade doesn't stop reciprocating when the saw is running because it's attached directly to the crankshaft. There is no clutch system.
Physical description
Reciprocating Saw.