Wooden Works Bow Clock No. 1

Wooden Works Bow clock No.1

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This clock was designed and built in the winter of 2005 as a prototype for a group co-operative project for the Central Ohio Wood Turners. The club's clock was shown at the Kansas City AAW convention in July of 2005 and won the "best in show" prize as well as taking top honors in the mechanical creations category.

The clock is powered by two laminated bows which work through a pulley system and fusee. It has a grasshopper escapement, a compound pendulum and a daisy wheel motion works. It is made of a variety of woods and veneers including cherry, figured maple, bubinga, bloodwood, boxwood, coco bolo and Brazilian rosewood. The wheels and pinions are made of plywood composed of veneer and epoxy using a vacuum press. They are drawn in BobCad-Cam and machined on a CNC mill using a 1/16 cutter.

The grasshopper escapement was invented by John Harrison in the early 18th century and was used in the first successful marine chronometer. It is ideal for wooden works clocks because it has almost no friction and is very efficient. This is the second grasshopper clock I have built and the first has been running trouble-free for 15 years.

© 2006 J.R. Beall