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Novel Zeitgeber devive for antique clock

Started by Unknown January 31, 2014
On Friday, January 31, 2014 9:58:24 PM UTC-5, Phil Hobbs wrote:
> On 1/31/2014 7:08 PM, John Larkin wrote: >
<lazy snip>
> > Many moons ago, Vannevar Bush and John Early Jackson spent part of their > retirement improving pendulum clocks, and learned a lot. > > http://jesseenterprises.net/amsci/1960/07/1960-07-fs.html > > http://jesseenterprises.net/amsci/1960/08/1960-08-body.html >
Fun.. (thread and links) We've got a torsional osicllator that goes at about 1 Hz. Next time one is set up I'll see if I can feed it 60 Hz and get it to lock. George H.
> Cheers > > > > Phil Hobbs > > > > -- > > Dr Philip C D Hobbs > > Principal Consultant > > ElectroOptical Innovations LLC > > Optics, Electro-optics, Photonics, Analog Electronics > > > > 160 North State Road #203 > > Briarcliff Manor NY 10510 > > > > hobbs at electrooptical dot net > > http://electrooptical.net
On Mon, 3 Feb 2014 06:24:40 -0800 (PST), George Herold
<gherold@teachspin.com> wrote:

>On Friday, January 31, 2014 9:58:24 PM UTC-5, Phil Hobbs wrote: >> On 1/31/2014 7:08 PM, John Larkin wrote: >> ><lazy snip> >> >> Many moons ago, Vannevar Bush and John Early Jackson spent part of their >> retirement improving pendulum clocks, and learned a lot. >> >> http://jesseenterprises.net/amsci/1960/07/1960-07-fs.html >> >> http://jesseenterprises.net/amsci/1960/08/1960-08-body.html >> >Fun.. (thread and links) We've got a torsional osicllator that goes at about 1 Hz. Next time one is set up I'll see if I can feed it 60 Hz and get it to lock. > >George H. >> Cheers >> >> >> >> Phil Hobbs >> >> >> >> -- >> >> Dr Philip C D Hobbs >> >> Principal Consultant >> >> ElectroOptical Innovations LLC >> >> Optics, Electro-optics, Photonics, Analog Electronics >> >> >> >> 160 North State Road #203 >> >> Briarcliff Manor NY 10510 >> >> >> >> hobbs at electrooptical dot net >> >> http://electrooptical.net
If I can find Jan Narud's thesis I'll post it. Just by hit and miss I'm discovering interesting (and useful) information about the effects of Q and where, in the cycle, injection should occur. I can clearly see clamping to ground at the zero crossings provides the most rapid acquisition and suggests an easy way to synchronize a sine wave to a crystal with better purity than with a straight filtering approach. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
On Fri, 31 Jan 2014 21:58:24 -0500, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>On 1/31/2014 7:08 PM, John Larkin wrote: >> On Fri, 31 Jan 2014 11:34:59 -0500, Phil Hobbs >> <pcdhSpamMeSenseless@electrooptical.net> wrote: >> >>> On 01/31/2014 10:19 AM, John Larkin wrote: >>>> On Fri, 31 Jan 2014 09:59:57 -0500, Phil Hobbs >>>> <pcdhSpamMeSenseless@electrooptical.net> wrote: >>>> >>>>> On 01/31/2014 09:27 AM, haiticare2011@gmail.com wrote: >>>>>> I have an antique clock which I have retrofitted with an >>>>>> oscillator circuit to make it very accurate. I did not use a >>>>>> sensor, nor did I modify the clock's mechanism or its iron >>>>>> pendulum bob in any way. There is absolutely no circuit or >>>>>> sensor which measures the clock. >>>>>> >>>>>> Yet it works. How did I do it? Any ideas? >>>>>> >>>>>> (I think it's novel, but it is so obvious, I am open to >>>>>> hearing differently..) >>>>>> >>>>>> >>>>>> >>>>> >>>>> You mechanically injection-locked it, perhaps? Pendulum clocks >>>>> will lock to each other if you put them close together on a >>>>> wooden floor. >>>>> >>>>> Cheers >>>>> >>>>> Phil Hobbs >>>> >>>> A coil below the pendulum, pulsed properly, would work. >>> >>> That's been done a lot, as you say. Of course it has a dead zone >>> right around lock, so the phase noise would be horrible. ;) (You >>> just have to put it slightly off center.) >>>> >>>> It should lock to a coil driven from 60 Hz (resistor+diode from >>>> AC line) and it might not even need the diode. >>> >>> That's a fun possibility. I wonder how close to 1 Hz it would have >>> to be in order to lock. The locking time would be pretty long, I >>> expect. >>> >>> Using a vibrator motor or something like that, you could probably >>> make an aftermarket injection locker for pendulum clocks that would >>> require zero mods to the clock. (I can just see an Android app for >>> that. Probably possible in some instances.) ;) >>> >>> Cheers >>> >>> Phil Hobbs >> >> How about a box that you stick to the back of the clock with velcro >> or something. Inside is a 1 RPS (or is that 0.5 RPS?) synchronous >> motor driving an eccentric weight on its shaft. It would slightly >> rock the clock case, probably not noticable. >> >That's the sort of thing I was thinking of--you might need to put some >polyurethane under the clock feet, or something like that. > >Many moons ago, Vannevar Bush and John Early Jackson spent part of their >retirement improving pendulum clocks, and learned a lot. > >http://jesseenterprises.net/amsci/1960/07/1960-07-fs.html > >http://jesseenterprises.net/amsci/1960/08/1960-08-body.html > >Cheers > >Phil Hobbs
Good book, "Endless Frontier" by Zachary. -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation
On Fri, 31 Jan 2014 23:08:02 +0000, Nico Coesel wrote:

> And yet they still tune the Big Ben in Londen by adding or removing > coins. I'll give them a ring on monday...
I once got pulled up over calling that clock "Big Ben". "Big Ben", apparently refers only to the large bell that strikes the hours. What the clock is called, I don't know. -- "Design is the reverse of analysis" (R.D. Middlebrook)
On 2014-02-05, Fred Abse <excretatauris@invalid.invalid> wrote:
> On Fri, 31 Jan 2014 23:08:02 +0000, Nico Coesel wrote: > >> And yet they still tune the Big Ben in Londen by adding or removing >> coins. I'll give them a ring on monday... > > I once got pulled up over calling that clock "Big Ben". > > "Big Ben", apparently refers only to the large bell that strikes the > hours. What the clock is called, I don't know.
AFAICT it doesn't have a special name. Victoria Tower Clock at the Brittish houses of parlement. or Victoria Tower Clock, Westminster, UK. -- For a good time: install ntp
On 5 Feb 2014 22:25:14 GMT, the renowned Jasen Betts
<jasen@xnet.co.nz> wrote:

>On 2014-02-05, Fred Abse <excretatauris@invalid.invalid> wrote: >> On Fri, 31 Jan 2014 23:08:02 +0000, Nico Coesel wrote: >> >>> And yet they still tune the Big Ben in Londen by adding or removing >>> coins. I'll give them a ring on monday... >> >> I once got pulled up over calling that clock "Big Ben". >> >> "Big Ben", apparently refers only to the large bell that strikes the >> hours. What the clock is called, I don't know. > > AFAICT it doesn't have a special name. > >Victoria Tower Clock at the Brittish houses of parlement. >or Victoria Tower Clock, Westminster, UK.
The "Great Clock of Westminster"? or perhaps "at Westminster"? Best regards, Spehro Pefhany -- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
On 31/01/2014 14:27, haiticare2011@gmail.com wrote:
> I have an antique clock which I have retrofitted with an oscillator circuit to make it very accurate. I did not use a sensor, nor did I modify the clock's mechanism or its iron pendulum bob in any way. There is absolutely no circuit or sensor which measures the clock. > > Yet it works. How did I do it? Any ideas? > > (I think it's novel, but it is so obvious, I am open to hearing differently.)
You have speeded it up slightly and installed it on a spacecraft which you move to and fro the earth at some very high speed as necessary to maintain the correct time? The so-called oscillator is a distraction barking up the wrong wild red herring goose chase tree. You don't fool me. Cheers -- Syd
On 05/02/2014 23:02, Spehro Pefhany wrote:
> On 5 Feb 2014 22:25:14 GMT, the renowned Jasen Betts > <jasen@xnet.co.nz> wrote: > >> On 2014-02-05, Fred Abse <excretatauris@invalid.invalid> wrote: >>> On Fri, 31 Jan 2014 23:08:02 +0000, Nico Coesel wrote: >>> >>>> And yet they still tune the Big Ben in Londen by adding or removing >>>> coins. I'll give them a ring on monday... >>> >>> I once got pulled up over calling that clock "Big Ben". >>> >>> "Big Ben", apparently refers only to the large bell that strikes the >>> hours. What the clock is called, I don't know. >> >> AFAICT it doesn't have a special name. >> >> Victoria Tower Clock at the Brittish houses of parlement. >> or Victoria Tower Clock, Westminster, UK. > > The "Great Clock of Westminster"? or perhaps "at Westminster"? > > > > Best regards, > Spehro Pefhany
Actually, we all call the clock and tower 'Big Ben'. The only people who don't are tour guides and smartarses. And maybe people called 'Ben' who happen to be big and are just fed up with it. cheers -- Syd
On Wednesday, February 5, 2014 6:21:16 PM UTC-5, Syd Rumpo wrote:
> On 05/02/2014 23:02, Spehro Pefhany wrote: > > > On 5 Feb 2014 22:25:14 GMT, the renowned Jasen Betts > > > <jqa9sen@xnet.co.nz> wrote: > > > > > >> On 2014-02-05, Fred Abse <excretatauris@invalid.invalid> wrote: > > >>> On Fri, 31 Jan 2014 23:08:02 +0000, Nico Coesel wrote: > > >>> > > >>>> And yet they still tune the Big Ben in Londen by adding or removing > > >>>> coins. I'll give them a ring on monday... > > >>> > > >>> I once got pulled up over calling that clock "Big Ben". > > >>> > > >>> "Big Ben", apparently refers only to the large bell that strikes the > > >>> hours. What the clock is called, I don't know. > > >> > > >> AFAICT it doesn't have a special name. > > >> > > >> Victoria Tower Clock at the Brittish houses of parlement. > > >> or Victoria Tower Clock, Westminster, UK. > > > > > > The "Great Clock of Westminster"? or perhaps "at Westminster"? > > > > > > > > > > > > Best regards, > > > Spehro Pefhany > > > > > > Actually, we all call the clock and tower 'Big Ben'. The only people > > who don't are tour guides and smartarses. And maybe people called 'Ben' > > who happen to be big and are just fed up with it. > > > > cheers > > -- > > Syd
Ad OP, I feel like I kicked a firecracker into a flea market. :) Hafta read all this soon...