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Registered Member #62109
Joined: Sun Jan 28 2018, 10:00PM
Location: Porto Alegre
Posts: 56
My grandpa had this clock while he was alive. It was hanging here on the wall for years, not working. First I thought, I will find a store to rebuilt this clock. Then I just took it from the wall and discovered it had very little problems actually. The clock "hands" or needles were a bit bent and loose. One washer was a bit damaged too. Now it works.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
One project on my to-do list for decades has been to make a precision pendulum clock, (I intend it to be 1.000000 'ticks' per second ) last year I bought a pendulum clock via eBay for £5 ... working, including delivery ! After a little cleaning and adjusting (it ran a little slow), I hung the clock in two different places in the house then finally in my shed, - because my family did not like the ticking sound, and hated the chimes. It is now in pieces waiting to be 'modified'
P.S. a bit of trivia : most pendulum clocks when well adjusted should not go 'Tick-Tock-Tick-Tock-..' it should be 'Tick-Tick-Tick-Tick ...'
Registered Member #103
Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
Fun project: Build a frequency synthesiser using the pendulum as a reference frequency. A magnetic or optical pickup could be input to a 4046 PLL, then with a bunch of dividers your output frequency could be in multiples of .5Hz, up to whatever frequency you desire! Good luck with the loop filter though
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3140
my plan was/is to feed the 1 pulse per second from the pendulum system (a simple 'pulse motor') to the electromagnet in a cheap analog display quartz clock - to display the time.
Due to thermal expansion, which can be the cycles of the Earth, Moon and Sun, tides etc. local "g" varies too much to be used as a precision reference, compared to e.g. a rubidium oscillator.
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Old Elias Ingraham clock
