Odd request
Yes, I have heard of 30 movements, but the ones I am working with have a
sixty step racket and are designed for onece per minute stepping. That is
an awesome clock!
John
----- Original Message -----
From: "Dave Brown" tractorb@ihug.co.nz
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Thursday, January 25, 2007 6:07 PM
Subject: Re: [time-nuts] Odd request
----- Original Message -----
From: "jmfranke" jmfranke@cox.net
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Friday, January 26, 2007 10:57 AM
Subject: Re: [time-nuts] Odd request
I am going the same route and have discovered slave clocks which are
solenoid driven clocks. The clocks were once very popular in
schools and
factories. The hands typically step in one minute steps.
See: http://www.clockhistory.com/setclocks/index.html
I plan to use one of the clock movements to display minutes and
hours and a
two digit LED digital display for the seconds. I will divide the
1PPS
output from a Z3801A by 60 to get 1PPM.
John WA4WDL
Some used a 30 second pulse as well - might pay to check the
particular slave you have before you make the divider! I have a
Gents master clock here- I DID want to put it in the lounge but it was
considerd too 'industrial' so its been relegated to 'outer darkness'!
Personally I think it's rather elegant, but......
Picture here-
http://homepages.ihug.co.nz/~tractorb/gents%20master.gif
These were made in two pendulum lengths-this is the longer case (3
foot pendulum) model.
DaveB, NZ
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Yes- XYL, SWMBO, whatever!!!
But she does like my Telechron 8B01-like this one
http://uv201.com/Clock_Pages/Telechron/telechron_minitmaster.htm
which some 'twas say the original digital clock. The 50Hz motor in
mine needs replacing-considering a stepper motor driven from GPS-but
that's another story.
DaveB, NZ
----- Original Message -----
From: "Jack Hudler" jack@hudler.org
To: "'Discussion of precise time and frequency measurement'"
time-nuts@febo.com
Sent: Friday, January 26, 2007 12:09 PM
Subject: Re: [time-nuts] Odd request
It is elegant! Was that the XYL's opinion?
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]
On Behalf
Of Dave Brown
Sent: Thursday, January 25, 2007 5:07 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Odd request
----- Original Message -----
From: "jmfranke" jmfranke@cox.net
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Friday, January 26, 2007 10:57 AM
Subject: Re: [time-nuts] Odd request
I am going the same route and have discovered slave clocks which are
solenoid driven clocks. The clocks were once very popular in
schools and
factories. The hands typically step in one minute steps.
See: http://www.clockhistory.com/setclocks/index.html
I plan to use one of the clock movements to display minutes and
hours and a
two digit LED digital display for the seconds. I will divide the
1PPS
output from a Z3801A by 60 to get 1PPM.
John WA4WDL
Some used a 30 second pulse as well - might pay to check the
particular slave you have before you make the divider! I have a
Gents master clock here- I DID want to put it in the lounge but it
was
considerd too 'industrial' so its been relegated to 'outer
darkness'!
Personally I think it's rather elegant, but......
Picture here-
http://homepages.ihug.co.nz/~tractorb/gents%20master.gif
These were made in two pendulum lengths-this is the longer case (3
foot pendulum) model.
DaveB, NZ
time-nuts mailing list
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24/01/2007 18:48
Well well there's hope for her yet :)
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf
Of Dave Brown
Sent: Thursday, January 25, 2007 5:28 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Odd request
Yes- XYL, SWMBO, whatever!!!
But she does like my Telechron 8B01-like this one
http://uv201.com/Clock_Pages/Telechron/telechron_minitmaster.htm
which some 'twas say the original digital clock. The 50Hz motor in
mine needs replacing-considering a stepper motor driven from GPS-but
that's another story.
DaveB, NZ
----- Original Message -----
From: "Jack Hudler" jack@hudler.org
To: "'Discussion of precise time and frequency measurement'"
time-nuts@febo.com
Sent: Friday, January 26, 2007 12:09 PM
Subject: Re: [time-nuts] Odd request
It is elegant! Was that the XYL's opinion?
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com]
On Behalf
Of Dave Brown
Sent: Thursday, January 25, 2007 5:07 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Odd request
----- Original Message -----
From: "jmfranke" jmfranke@cox.net
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Friday, January 26, 2007 10:57 AM
Subject: Re: [time-nuts] Odd request
I am going the same route and have discovered slave clocks which are
solenoid driven clocks. The clocks were once very popular in
schools and
factories. The hands typically step in one minute steps.
See: http://www.clockhistory.com/setclocks/index.html
I plan to use one of the clock movements to display minutes and
hours and a
two digit LED digital display for the seconds. I will divide the
1PPS
output from a Z3801A by 60 to get 1PPM.
John WA4WDL
Some used a 30 second pulse as well - might pay to check the
particular slave you have before you make the divider! I have a
Gents master clock here- I DID want to put it in the lounge but it
was
considerd too 'industrial' so its been relegated to 'outer
darkness'!
Personally I think it's rather elegant, but......
Picture here-
http://homepages.ihug.co.nz/~tractorb/gents%20master.gif
These were made in two pendulum lengths-this is the longer case (3
foot pendulum) model.
DaveB, NZ
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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--
No virus found in this incoming message.
Checked by AVG Free Edition.
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24/01/2007 18:48
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Oh, that would look so nice, next to some of my tube radios!
----- Original Message -----
From: "Dave Brown" tractorb@ihug.co.nz
To: "Discussion of precise time and frequency measurement"
time-nuts@febo.com
Sent: Thursday, January 25, 2007 4:27 PM
Subject: Re: [time-nuts] Odd request
Yes- XYL, SWMBO, whatever!!!
But she does like my Telechron 8B01-like this one
http://uv201.com/Clock_Pages/Telechron/telechron_minitmaster.htm
which some 'twas say the original digital clock. The 50Hz motor in
mine needs replacing-considering a stepper motor driven from GPS-but
that's another story.
DaveB, NZ
mark,
look at a cheap kitchen clock that runs on a battery and uses a 1pps to
move the second hand which moves gears for the rest.
tom w0kgw
----- Original Message -----
From: "Mark Amos" mark.amos@toast.net
To: time-nuts@febo.com
Sent: Thursday, January 25, 2007 3:50 PM
Subject: [time-nuts] Odd request
Time-nuts
I appreciate the comments regarding horological obsession. Mine started
with a desire for an accurate master
oscillator for my ham shack (built and use a couple Shera GPSDO's) and has
blossomed into a much broader interest
in time (Ex tempus, sapientia?)
This has led me to a silly quest. I'd like to use a traditional clock
face and hands as an output device for a
1PPS signal from my GPSDO.
I know this is a very broad question, but does anyone have advice on where
I might start hacking (or making) a
mechanical clock face to accomplish this? Is there a simple clock design
that I could start with to build my own?
Maybe replacing a pendulum or escapement with a solenoid? Any examples to
work from?
Mark
time-nuts mailing list
time-nuts@febo.com
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Hi Jack:
OK, so now I've won the Edwards school clock eBay item number 110081232209
I choose it because of the second hand.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110081232209
But how how to connect it?
Have Fun,
Brooke Clarke
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
Jack Hudler wrote:
There are some clocks like the ones in schools that use a 1PPS, 1PPM or faster.
On eBay
230081995247 nice
110082857347 neat!!
250076726064
110081232209
180076563718
This guy is selling a master simulator 200071362893
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf
Of Mark Amos
Sent: Thursday, January 25, 2007 3:51 PM
To: time-nuts@febo.com
Subject: [time-nuts] Odd request
Time-nuts
I appreciate the comments regarding horological obsession. Mine started with a
desire for an accurate master
oscillator for my ham shack (built and use a couple Shera GPSDO's) and has
blossomed into a much broader interest
in time (Ex tempus, sapientia?)
This has led me to a silly quest. I'd like to use a traditional clock face and
hands as an output device for a
1PPS signal from my GPSDO.
I know this is a very broad question, but does anyone have advice on where I
might start hacking (or making) a
mechanical clock face to accomplish this? Is there a simple clock design that I
could start with to build my own?
Maybe replacing a pendulum or escapement with a solenoid? Any examples to work
from?
Mark
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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On Thu, 25 Jan 2007 16:50:46 -0500, "Mark Amos" mark.amos@toast.net
wrote:
This has led me to a silly quest. I'd like to use a traditional clock face and hands as an output device for a
1PPS signal from my GPSDO.
I know this is a very broad question, but does anyone have advice on where I might start hacking (or making) a
mechanical clock face to accomplish this? Is there a simple clock design that I could start with to build my own?
Maybe replacing a pendulum or escapement with a solenoid? Any examples to work from?
Finally something I can contribute.
Any el-cheapo quartz clock movement should work with a little mod.
I've disassembled several brands and they all appear to be the same on
the inside. A chip-on-board does the logic and a 2 coil stepping
motor drives the second hand. The minute and hour hands are driven
through conventional geartrains. The stepper has two coils and the
rotor turns 90 deg with each step. All you need is a little logic to
take the one PPS and turn it into stepper commands. Anything from a
PLA to a PIC should do.
If you didn't want to mod the clock you could build a 32khz oscillator
phase locked to the one PPS signal and feed this in place of the
tuning fork crystal. Hard to say which would be simpler but probably
modding the clock to drive the stepper directly.
John
John De Armond
See my website for my current email address
http://www.neon-john.com
Cleveland, Occupied TN
Don't let your schooling interfere with your education-Mark Twain
Hi Tom...
Not only Telechron were very popular electric clock
movements, they were BY FAR the very best mechanical
movements ever made.
When young, i've opened A LOT of used
electro-mechanical clock movements, and most of them
showed evident traces of wear. Worn-out gear pinions,
dried-out and seized brass/steel bushings, dried-out
and cracked nylon pinions (Nylon tends to harden and
shrink with time and heat, so Nylon parts shall NEVER
be put on a traction stress when manufactured) were
frequent on old clock movements, but NEVER on
Telechrons, except very
rare cases of pinion wear on the output shaft (3.6
RPM)
Telechron movements were very unique. The motors were
two-pole shaded pole synchronous motors with an
external solenoid and a completly sealed rotor
stuck within the poles pieces. The self-starting
rotor, composed of three spring steel disks forced in
place on a smooth shaft and spinning at 3600 RPM (60
Hz) was inside a sealed cylindrical aluminum gearbox
(older gearboxes were in a copper sealed box)
containing not only the rotor shaft, but also a 1000:1
reduction geartrain. Pinions were made of stacked thin
steel pinion disks forced on the shaft to form single
solid pinions. The faster rotating gears plates were
made of some kind of red-orange colored fiber material
and the slower rotating (higher torque) plates, of
soft brass. The gear holding plates were made of thick
alunimum with a thinner aluminum subplate that
prevented the gears from sliding longitudinally, but
far more important, the thin space between the plates
and subplates had a capital role: Keeping a fine
capillary oil film between the plate and subplate,
that film kept the gear shafts permanently lubricated,
thus eliminating all trace of wear. Even the gears
themselves (the rotor was spinning at 3600 RPM and the
second gear, at 864 RPM) didn't show any trace of
wear, even under a magnifying glass.
I even remember the gear ratios of a Telechron:
Rotor: 12 toothed pinion (3600 RPM)
Second gear: 50 tooth fiber plate coupled to a 12
tooth pinion R:r: 4.1666667:1
Third gear: 54 tooth fiber plate coupled to a 18
tooth pinion R:r: 4.5:1
Fourth gear: 60 tooth fiber plate coupled to a 12
tooth pinion R:r: 3.3333333:1
Fifth gear: 60 tooth brass plate coupled to a 12
tooth pinion R:r: 4:1
Output gear: 60 tooth brass plate coupled to an
external 10 tooth pinion R:r: 4:1
4.166674.53.33333344=1000
Definitely a fine movement! I still use an oooold
Telechron at my shop.
73 de Normand VE2UM
--- "Tom Van Baak (mobile)" tvb@LeapSecond.com
wrote:
See Mitchell's SWCC page at:
http://www.telechron.com/
/tvb
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On Thu, Jan 25, 2007 at 08:37:27PM -0800, Normand Martel wrote:
Hi Tom...
Not only Telechron were very popular electric clock
movements, they were BY FAR the very best mechanical
movements ever made.
When young, i've opened A LOT of used
electro-mechanical clock movements, and most of them
showed evident traces of wear. Worn-out gear pinions,
dried-out and seized brass/steel bushings, dried-out
and cracked nylon pinions (Nylon tends to harden and
shrink with time and heat, so Nylon parts shall NEVER
be put on a traction stress when manufactured) were
frequent on old clock movements, but NEVER on
Telechrons, except very
rare cases of pinion wear on the output shaft (3.6
RPM)
Telechron movements were very unique. The motors were
two-pole shaded pole synchronous motors with an
external solenoid and a completly sealed rotor
stuck within the poles pieces. The self-starting
rotor, composed of three spring steel disks forced in
place on a smooth shaft and spinning at 3600 RPM (60
Hz) was inside a sealed cylindrical aluminum gearbox
(older gearboxes were in a copper sealed box)
containing not only the rotor shaft, but also a 1000:1
reduction geartrain. Pinions were made of stacked thin
steel pinion disks forced on the shaft to form single
solid pinions. The faster rotating gears plates were
made of some kind of red-orange colored fiber material
and the slower rotating (higher torque) plates, of
soft brass. The gear holding plates were made of thick
alunimum with a thinner aluminum subplate that
prevented the gears from sliding longitudinally, but
far more important, the thin space between the plates
and subplates had a capital role: Keeping a fine
capillary oil film between the plate and subplate,
that film kept the gear shafts permanently lubricated,
thus eliminating all trace of wear. Even the gears
themselves (the rotor was spinning at 3600 RPM and the
second gear, at 864 RPM) didn't show any trace of
wear, even under a magnifying glass.
I even remember the gear ratios of a Telechron:
Rotor: 12 toothed pinion (3600 RPM)
Second gear: 50 tooth fiber plate coupled to a 12
tooth pinion R:r: 4.1666667:1
�> Third gear: 54 tooth fiber plate coupled to a 18
tooth pinion R:r: 4.5:1
Fourth gear: 60 tooth fiber plate coupled to a 12
tooth pinion R:r: 3.3333333:1
Fifth gear: 60 tooth brass plate coupled to a 12
tooth pinion R:r: 4:1
Output gear: 60 tooth brass plate coupled to an
external 10 tooth pinion R:r: 4:1
4.166674.53.33333344=1000
Definitely a fine movement! I still use an oooold
Telechron at my shop.
73 de Normand VE2UM
--- "Tom Van Baak (mobile)" tvb@LeapSecond.com
wrote:
See Mitchell's SWCC page at:
http://www.telechron.com/
/tvb
time-nuts mailing list
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Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users.
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--
Dave Emery N1PRE, die@dieconsulting.com DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
�'For Rent' sign still vainly flapping outside on the weed encrusted pole - in
celebration of what could have been, but wasn't and is not to be no�
�
Brooke,
Well I would guess that all depends on what you fine under that cover!
:)
It appears to be a 4 wire system which could mean you may find a run
motor and a correction coil. But I'm just guess'n. :)
Send pictures!
Jack
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf
Of Brooke Clarke
Sent: Thursday, January 25, 2007 9:00 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Odd request
Hi Jack:
OK, so now I've won the Edwards school clock eBay item number 110081232209
I choose it because of the second hand.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110081232209
But how how to connect it?
Have Fun,
Brooke Clarke
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
Jack Hudler wrote:
There are some clocks like the ones in schools that use a 1PPS, 1PPM or faster.
On eBay
230081995247 nice
110082857347 neat!!
250076726064
110081232209
180076563718
This guy is selling a master simulator 200071362893
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On Behalf
Of Mark Amos
Sent: Thursday, January 25, 2007 3:51 PM
To: time-nuts@febo.com
Subject: [time-nuts] Odd request
Time-nuts
I appreciate the comments regarding horological obsession. Mine started with a
desire for an accurate master
oscillator for my ham shack (built and use a couple Shera GPSDO's) and has
blossomed into a much broader interest
in time (Ex tempus, sapientia?)
This has led me to a silly quest. I'd like to use a traditional clock face and
hands as an output device for a
1PPS signal from my GPSDO.
I know this is a very broad question, but does anyone have advice on where I
might start hacking (or making) a
mechanical clock face to accomplish this? Is there a simple clock design that I
could start with to build my own?
Maybe replacing a pendulum or escapement with a solenoid? Any examples to work
from?
Mark
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
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