Pretty funny. As a ham radio operator I have had 4 clocks on the walls for
years.
I obtained 5 IBM clocks quite a while ago and built drivers and such for
them. Actually ran them for a while but found the noise annoying. Replaced
them with cheap wall clocks internal drivers removed and a master sys
The rapid clicking of slave clocks in schools was a design feature of IBM (and
later Simplex) clocks. The master clock sent out minute pulses to the slave
clocks for the first 50 minutes of each hour on the "A" side of the circuit.
Slave clocks operating on-time would automatically switch to the
Hi Hal:
I think there were a number of slave clock systems and some of them could do DST/ST changes and/or catch up from a power
failure.
That very well might have been what you heard.
To me the winding sounds like a muffled air compressor.
The setting sounds like Thunk.
Mail_Attachment --
Ha
bro...@pacific.net said:
> The click-click-click... is the self winding. A solenoid vibrates back and
> forth and a pawl and ratchet winds the main spring.
I don't think that's what I was referring to. It was a long time ago so my
memory may be buggy.
The click-click-click... that I remembe
ber 1, 2014 4:14 PM
Subject: Re: [time-nuts] 1903 Railroad self-Winding / Self-setting Clock
Hi Hal:
The click-click-click... is the self winding. A solenoid vibrates back and
forth and a pawl and ratchet winds the main
spring.
https://www.youtube.com/watch?v=QIxOVo_0xgo&feature
Hi Hal:
The click-click-click... is the self winding. A solenoid vibrates back and forth and a pawl and ratchet winds the main
spring.
https://www.youtube.com/watch?v=QIxOVo_0xgo&feature=youtu.be
Mail_Attachment --
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.co
Hi Mike:
The hourly synchronization 1 second wide pulse turns on a second prior to the
top of the hour and off at the top.
But . . . . it's not a low voltage pulse, but rather each clock is in a series loop where the external resistance is
more than an order of magnitude higher than the intern
Book info amazon
http://www.amazon.com/American-Clocks-Volume-Special-Self-Winding/dp/0930163
443/ref=sr_1_sc_3?ie=UTF8&qid=1414869823&sr=8-3-spell&keywords=american+cloc
ks+tran+duyly
73,
Bill, WA2DVU
Bill I responded to Mike there seems to be a number of threads running on
this.
So in fact y
The Western Union clocks used in broadcasting up through the middle 70's were
designed to be corrected through one-second current pulses over a standard 60
mA teletype loop. The clocks were wired in series like the old series
Christmas-tree bulbs.
Internally, the clocks employed two 1-1/2 V
Bill I responded to Mike there seems to be a number of threads running on
this.
So in fact you do have the telegraph coil in the clock. Makes sense to me.
Thats why the 100 V they needed to drive 10-20 ma through the coil over
distance and had to account for line loss.
The boook you mention. Online
It certainly depends on your comfort with any particular technology.
Be it discrete ICs or microprocessors what you ask for is indeed trivial to
do.
The hardest part may be building the pulse driver and thats not really hard.
The telegraphs should have been a higher voltage to drive a 10-20 ma
curr
I have the wall mounted version. I believe that the hour adjust solenoid
took 100 volts or so. I will check my manual on the clock. At a minute
before the top of the hour until a minute after the hour all traffic would
stop on the WU lines and at the top of the hour a 100 v dc pulse came over
the
ing one of
> these units I had modified but at the time there wasn't a single person
> who was interested. I have been using the RFTG-u REF1 since then and
> it is a nice unit. The modifications I added (including a power supply
> -see photo) allows the lights to cycle through their n
Hi
The “easy way” is probably to take a GPS module and get the time out of that.
There’s not a big need for a GPSDO in this case. The modules cost < $20 and run
on very little power.
Mate the module up with your processor du-jour and let it figure out when the
top of the hour is. There are a
We had something like that in school when I was a kid. (many years ago)
I remember occasional click-click-click... as it got reset.
mp...@clanbaker.org said:
> I am wondering what the easiest approach to this might be?I suppose I
> could take the 1-sec pulses from a GPSDO (Trimble Thunderb
Hello, Time-Nutters--
A friend has a vintage oak-cabinet pendulum movement
clock made by The Self Winding Clock Company some time
around 1903. The company was formed in 1886. By the
early 1900's era, this clock was known for its relative
accuracy. These clocks were pendulum controlled and
powe
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