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Clock 4 was designed with a Verge and Foliot escapement that was used before the
pendulum was introduced to clockmakers. The time keeping with this mechanism is not
as good as that of a pendulum because of the numerous variables within the mechanism,
but adjustment by positioning the two weights on the Foliot arm can bring it within
a reasonable accuracy. This is a visually interesting clock with its single hour
bar and weights, and the compound verge component made completely from wood is unusual.
More details of the Verge and Foliot mechanism can be seen here.
Drawings for this clock in PDF format can be downloaded here, they are drawn to scale
so that they can be printed at full size on either A3 or Super B papers. I realise
that not everyone has access to these large format printers so there is a way of
printing out smaller area’s at full size standard paper sizes using Acrobat Reader.These
files are free as are the ones for clocks 1,2 and 5 but for all newer clocks there
is a small charge.
For those clock builders who will be using CNC to cut the profiles the DXF files
for this clock and Clocks 1,2 and 5 are available for $25. This gets you all 4 clocks
in DXF format, the files have been compiled to place the flat profiled parts for
each one sheet for each clock.The files have all been re-created to remove as much
as possible the broken lines in the originals.To view an image file showing how the
DXF files are laid out click here
To print only a single item of the drawing to scale using Adobe Acrobat Reader, do
Go to Edit then click on Take a snapshot
Move the cursor to the top left of the item you want to print and hold down the left
mouse button whilst you drag a box around the item. The inside of the box turns
blue and you can now go to File and then click on Print . This brings up the print
dialogue, make sure Selected graphic is selected and that the Page scaling is set
to None and the click on OK .
As long as your printer is connected you will have printed the item at size.