For those that are unfamiliar, the device in question is a step more recent than
the worm gear wheel and stopwatch tachometer (Starrett 104, for instance), in
that a mechanical timing device (spring driven watch) automatically starts and
stops the rev counter. Typically, these run for 3 or 6 seconds and have lovely
faces graduated to directly indicate speed, often with two hands. For example,
my slowest speed unit goes up to 200RPM, the big hand registering 10RPM per
revolution to the 1/20th, and the little hand registering 100RPM per revolution.
I have several from various manufacturers in differing ranges, and use them in
preference to the 'modern' 'lectrical devices for the same reason I prefer a
vernier caliper and dial indicator to the modern usurpers.
The question: Has anyone done disassembly to a Hasler made unit? I picked
another one up the other day by chance (semi-gloatable price: $5. Not as good as
the perfect Jaquet I was given a few years ago with "take it. I never could
figure out how this clock works", but good), and it runs very consistently
about 20% slow (readings are 20% high, as it is counting too long) and the
feedback through the case from the balance wheel feels.... weak, so, at a
minimum, adjustment is needed, possibly cleaning, and it may just be worn out,
though I have never seen one that was. These are pretty rugged devices, by the
standard of the day. I am loathe to pay a repair shop to touch it, as anyone
competent is the art is likely to be way out of my price range for a device that
is not particularly rare or expensive, but I prefer to do due diligence before I
start prying away at the case, and maybe learn something even if it requires
repair beyond my skill level.
Side note: I have been looking for a Jaquet two dial (Biddle is the distributor
name I see most in the US) type. They are, in my opinion, the coolest of the
breed. One day I will stumble upon one.
*** This message was sent from a convenience email service, and the reply
address(es) may not match the originating address
|