Discussion:
timing an ITR master clock
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Jerry Hancock
2018-04-02 15:42:47 UTC
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I have a new to me International Time Recorder (pre-IBM) master clock. I has second, minute and hour closures and was thinking of using the second closure to check the beat and time. If others have done this kind of thing, let me know. I have a mix of timing equipment, of course, and have to be careful with DC always, so I was thinking of just using an oscillator looped through the second switch to get a rough idea of the timing.

Thoughts? Beautiful clock, a friend of mine is the current expert having over 300 such clocks and affiliated secondary clocks, etc.

Regards,

Jerry


Jerry Hancock
***@hanler.com
(415) 215-3779

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Tom Van Baak
2018-04-02 17:16:34 UTC
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Jerry,

Most people I know who time mechanical clocks use Bryan Mumford's Microset timer:

https://www.bmumford.com/microset.html

https://www.bmumford.com/mset/model3.html

Bryan has a wide variety of sensors: optical, acoustic, magnetic, laser, etc.

Of course it is possible to home-brew a solution. Many of us have done that. But it's not quite as easy as it sounds to get a system that gives you reliable data.

Several people use PC's as the timer, but be aware that pendulum clocks can easily achieve ppm levels of stability in which case the data you get might actually be your PC being timed by a pendulum, not a pendulum being timed by a PC.

You might also get good advice from one of the watch & clock forums on the 'net. We tend to stay away from generic mechanical clock topics here on time-nuts.

/tvb

----- Original Message -----
From: "Jerry Hancock" <***@hanler.com>
To: "Discussion of precise time and frequency measurement" <time-***@febo.com>
Sent: Monday, April 02, 2018 8:42 AM
Subject: [time-nuts] timing an ITR master clock
Post by Jerry Hancock
I have a new to me International Time Recorder (pre-IBM) master clock. I has second, minute and hour closures and was thinking of using the second closure to check the beat and time. If others have done this kind of thing, let me know. I have a mix of timing equipment, of course, and have to be careful with DC always, so I was thinking of just using an oscillator looped through the second switch to get a rough idea of the timing.
Thoughts? Beautiful clock, a friend of mine is the current expert having over 300 such clocks and affiliated secondary clocks, etc.
Regards,
Jerry
Jerry Hancock
(415) 215-3779
_______________________________________________
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-***@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

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